WO2009035261A2

WO2009035261A2 - Safety flashing device for a bicycle

Info

Publication number: WO2009035261A2
Application number: PCT/KR2008/005344
Authority: WO
Inventors: Jae Yong Lee
Original assignee: Jae Yong Lee
Priority date: 2007-09-10
Filing date: 2008-09-10
Publication date: 2009-03-19
Also published as: WO2009035261A3

Abstract

Disclosed is an improved safety light flashing device for a bicycle in which a plurality of light emitter such as LED is installed on a hollow bicycle seat column in order to irradiate light for rear viewing and side viewing so that the walkers on a street or vehicle drivers can recognize the bicycle. According to an embodiment of the present invention, a light emitting assembly and a power source assembly for supplying power to the light emitting assembly, which is connected electrically thereto, are arranged on the hollow bicycle seat column. Here, at least one first through-hole acting as a channel for light irradiated from the light emitting assembly is formed on the hollow bicycle seat column. In the hollow bicycle seat column, a PCB of the light emitting assembly is housed into a first safe keeping housing both ends of which are opened lengthwise, is connected electrically to at least one light emitter for irradiating light outside, and is controlled of an operation by an exposed operation button provided on the hollow bicycle seat column. The battery in the power source assembly is inserted into the hollow bicycle seat column through a lower opened surface thereof and is arranged in a battery site, and supported by a bracket fastened to the lower part of the hollow bicycle seat column. Preferably, the at least one light emitter is made of a light emitting diode.

Description

Description SAFETY FLASHING DEVICE FOR A BICYCLE

Technical Field

[1] The present invention relates to a light flashing device for a bicycle, and more particularly, to an improved safety light flashing device for a bicycle in which a plurality of light emitter such as LED, which flashes light with the power supplied from a power source such a battery, is installed on a bicycle seat column to irradiate light rearward the bicycle so that walkers or vehicle drivers on a street can recognize easily the bicycle at night to secure safety of a bicycle rider. Additionally, the light flashing device can be installed easily and less damaged. Background Art

[2] Generally, a headlamp is provided on a bicycle for a rider to see front views at night riding; however, since only reflectors are typically provided at a rear side of the bicycle, the walkers or vehicle drivers on a road, etc. have difficulties in recognizing the traveling bicycle. That is, the reflectors are not self-emitted light and act only on reflecting external light and thus they are limitative to brightness thereof because they depend on the external light. Accordingly, the aforementioned bicycle traveling on a road at night is not clearly recognized by the walkers or vehicle drivers, causing frequently accidents.

[3] Recently, various attempts have been made in order to solve the above problems, one example of which is Korean Patent Registration No. 10-0512754, registered on August 30, 2005 (entitled "A bicycle provided with a safety flashing device operated using a self-powered source"), which is schematically shown in the attached drawing FIG. 15.

[4] As shown in FIG. 15, a bicycle 10 provided with a safety flashing device operated using a self -powered source according to the prior art includes a self-powered device 20 and a safety flashing device 30 which is connected electrically to the self -powered device 20 and emits light using electromotive force generated from the self-powered device. The self -powered device 20 includes a generator 21 installed on frames 14 of a front wheel 11 and rear wheel 12, wherein a contact cap 24 enclosing a rotation shaft 22 of the generator 21 is contactable with a rim 15 of the wheels 11, 12, and a fitness groove 23 is formed on a side of the generator 21, on which an elastic ring 25 is installed to improve engagement force between the generator 21 and the rim 15. The safety flashing device 30 is connected electrically to the self-powered device 20 through an electric wire, and a plurality of light emitting diode 122 are installed on internal space 110 of a support rod 100 of the safety light flashing device. In addition, a warning light device 200 having an electric bulb 210 provided with a rotation plate 212, which is operated with a motor 214, is provided on the external part of the support rod 100. The bicycle 10 adapted as aforementioned can ensure safety riding at night through the safety light flashing device provided on the front wheel and rear wheel.

[5] However, there arises a problem in the bicycle 10 according to the prior art that much physical force needs to drive the generator 21, causing depleting physical strength of a rider thereon. Furthermore, the configuration thereof is complicated and difficult to install, and further the supporters exposed outside are susceptible to damage.

[6] Meanwhile, a bicycle safety light provided to a bicycle seat column was disclosed in

U.S. Patent No. 4, 860, 177, which was issued to John B. Simms on August 22, 1989. The '177 patent relates to a bicycle safety light which improves the visibility of the bicycle and rider during periods of low light levels such as at dawn, dusk and at night. For this purpose, a light assembly is installed on the bicycle seat column, which includes a pair of housings connected to each other. Here, a plurality of orifices are formed on the housing, and LED is arranged such that a portion thereof is exposed to the outside through the orifices. LED may be on-off, if necessary, by means of an on- off switch provided on one side of the housing. However, in the said configuration, there are drawbacks in that since the light assembly is provided outside the bicycle seat column, the external appearance is to be poor and damaged from external impact, and rain may sink into to cause malfunction.

[7] Additionally, a safety light flashing light device provided to a bicycle saddle was disclosed in U.S. Patent No. 5, 504, 622, which was issued to Wen-Chen Hung on April 2, 1996. The object of the above invention is to provide safety bicycle seat column which automatically gives a visual flash signal when a rider sits on a bicycle saddle wherein a flash light device is fastened to the back side of the bicycle saddle and a battery box is disposed within the bicycle saddle and connected electrically to the flash light device. Additionally, a control switch for controlling the above devices is disposed inside the safety bicycle saddle and a quick-flash starter is mounted on a frame of the bicycle. Here, the control switch is adapted to response to the body weight of the rider and thus can be easily switched on when the rider sits on the saddle. Additionally, when the quick-starter provided separately on a bicycle frame is operated, if necessary, the flash light device is driven to flash at a high frequency. However, in the configuration of the above invention, since the light flash device is installed on only one location of the rear part of the safety bicycle saddle, visual warning effect is not sufficient.

[8] Accordingly, in order to solve the aforementioned drawbacks strong needs exist for developing safety light flashing device for a bicycle, which can provide the walkers or vehicle drivers with excellent visual warning effect and keep safety during external impact, and further manufactured and installed easily. Disclosure of Invention

Technical Problem

[9] Accordingly, the present invention has been proposed to solve the above drawbacks, ant the object of the present invention is to provide a safety light flashing device for a bicycle in which a plurality of light emitter such as LED are installed on a hollow bicycle seat column to irradiate light toward rear side of the bicycle for securing safety riding at night.

[10] Another object of the present invention is to provide a improved safety light flashing device for a bicycle in which a plurality of light emitter such as LED are fastened to a hollow bicycle seat column to irradiate light toward rear side of the bicycle during periods of low light level such as at dawn, dusk, and at night, and which can be manufactured and installed easily and can prevent risk of losing and damaging. Technical Solution

[11] According to one aspect of the present invention in order to achieve the aforementioned object, there is provided a safety light flashing device for a bicycle comprising a hollow bicycle seat column, a light emitting assembly for irradiating light outside, which is arranged inside the hollow bicycle seat column, and a power source assembly for supplying power to the light emitting assembly, which is connected electrically thereto. Meanwhile, at least one first through-hole is formed on the bicycle seat column.

[12] Preferably, the number of the at least first through-hole may be selected within a range which will not affect strength of the bicycle seat column.

[13] Here, the light emitting assembly comprises a first safe keeping housing both ends of which are opened lengthwise and on one side of which at least one second through- hole is formed, a PCB to be housed inside the first safe keeping housing, at least one light emitter for irradiating light outside, which is connected electrically to the PCB, and an operation button for controlling operations of the PCB and at least one of light emitters, which is exposed outside the hollow bicycle seat column.

[14] Additionally, the power source assembly comprises a second hollow safe keeping housing which is connected electrically to the PCB housed inside the first safe keeping housing and inside which a battery site for housing a battery is provided, a battery which is arranged in the battery site, and an electrode bracket for supporting the battery which is arranged in the battery site, which is fastened to the second safe keeping housing. The battery is inserted into the second safe keeping housing through the opened lower surface of the hollow bicycle seat column, and arranged inside the battery site.

[15] According to another aspect of the present invention, there is provided a safety light flashing device for a bicycle comprising a hollow bicycle seat column, a light emitting assembly for irradiating light outside, which is arranged outside the hollow bicycle seat column, and a power source assembly for supplying power to the light emitting assembly, which is connected electrically thereto.

[16] Here, a housing groove for housing the light emitting assembly is formed on one radial external side of the hollow bicycle seat column.

[17] Additionally, the light emitting assembly comprises a PCB to be inserted into the housing groove and arranged, at least one light emitter for irradiating light outside, which is connected electrically and attached integrally to the PCB, and an operation button for controlling operations of the PCB and at least one light emitter, which is exposed outside the hollow bicycle seat column.

[18] Preferably, the at least one light emitter is made of a light emitting diode.

Advantageous Effects

[19] The safety light flashing device for a bicycle according to the present invention has some advantages such that since a plurality of light emitter such as LED is installed on a hollow bicycle seat column, when a rider travels on a bicycle during periods of cloudy day or at night, it can irradiate light with excellent visibility not only rearward, but also sideward to avoid traffic accidents. Furthermore, the commercially obtainable existing bicycle seat column can be replaced easily with the hollow bicycle seat column of the present invention which can easily assembled and disassembled to improve industrial utility. In addition, in a case of the safety light flashing device according to a first embodiment of the present invention as described in the following, it is arranged inside the bicycle seat column and there is no protrusion part to avoid lost and damage. Brief Description of the Drawings

[20] To complement the description being made and for the purpose of aiding to better understand the feature of the invention according to preferred practical embodiments thereof, a set of drawings is attached as an integral part of said description in which the following is shown with an illustrative and non-limiting character:

[21] FIG. 1 is a perspective view of a bicycle safety saddle provided with a safety light flashing device for a bicycle according to a first preferred embodiment of the present invention;

[22] FIG. 2 is an exploded perspective view of the bicycle safety saddle provided additionally with a laterally light emitting guide member;

[23]

[24] *FIG. 3 is a perspective view of an assembled light emitting member shown in FIG.

2; [25] FIG. 4 is a perspective view of an assembled power source member shown in FIG. 2;

[26] FIG. 5 is a front- sectional view of a first safekeeping housing shown in FIG. 2;

[27] FIG. 6 is a partially front- sectional view of the light emitting member mounted within the first safekeeping housing shown in FIG. 2;

[28] FIG. 7 is a view of a PCB and light emitter installed inside the bicycle safety saddle;

[29] FIG. 8 is a view of the PCB and light emitter installed outside the bicycle safety saddle;

[30] FIG. 9 is a perspective view of a bicycle safety saddle provided with a safety light flashing device for a bicycle according to a second preferred embodiment of the present invention;

[31] FIG. 10 is an exploded perspective view of the bicycle safety saddle shown in FIG.

9;

[32] FIG. 11 is a view of a housing groove for the bicycle safety saddle shown in FIGS. 9 and 10;

[33] FIGS. 12 to 14 are views of various connection way between the power source member and light emitter of the safety light flashing device for a bicycle according to the second embodiment of the present invention; and

[34] FIG. 15 is a view of a bicycle provided with a safety light flashing device according to the prior art. Best Mode for Carrying Out the Invention

[35] Other objects and advantages of the present invention will become more apparent from the following detailed description of, when taken in conjunction with the accompanying drawings which show, for the purpose of illustration only, two embodiments of the present invention. It should be borne in mind that, unless noted otherwise, like or corresponding elements among figures may be indicated by like or corresponding reference numerals.

[36] Although the invention is described with respect to specific embodiments, the principles of the invention, as defined by the claims appended herein, can obvious be applied beyond the specifically described embodiments of the present invention. Moreover, in the description of the present invention, certain details have been left out in order not to obscure the inventive aspect of the present invention. The details left out are within the knowledge of a person of ordinary skill in the art.

[37] A bicycle seat column provided with a safety light flashing device for a bicycle according to a first preferred embodiment of the present invention is shown in FIGS. 1 and 2.

[38] Referring to FIGS. 1 and 2, the safety light flashing device for a bicycle according to the first preferred embodiment of the present invention includes a hollow seat column 100, and a light emitting assembly 110 and a power source assembly 130 which are arranged inside the seat column 100.

[39] First, the seat column 100 is disposed such that it extended vertically from a pedal to a saddle of a bicycle and may be installed easily to a commercially obtainable bicycle. According to the first preferred embodiment of the present invention, at least one through-hole 102 may be formed in the seat column 100. Preferably, the number of the at least first through-hole may be selected within a range which will not affect strength of the bicycle seat column.

[40] The light emitting assembly 110 which is inserted into the inside of the seat column

100 acts on receiving power from the power source assembly 130 and irradiating light outside the seat column 100. For this purpose, the light emitting assembly 110 includes a first elastic safekeeping housing 112, PCB 116, light emitter 118 and operating button 120.

[41]

[42] *The first safekeeping housing 112 is opened lengthwise at its both ends and one side of which is opened lengthwise. Additionally, at least a second through-hole 124 is formed opposing side to the opened side of the safekeeping housing and at a location corresponding to the first through-hole 102 formed through the seat column 100.

[43] At least one light emitter 118 is attached integrally to one surface of the PCB 116 to connect electrically thereto and the numbers of which are corresponded to those of the first through-hole 102 and second through-hole 124. Differently from this configuration, at least one light emitter 118 may be arranged in a cluster form, corresponding to the respective second through-hole 124. The light emitter may be preferably comprised of LED. Furthermore, an operation button 120 is attached to one surface of PCB opposing to the surface on which at least one light emitter 118 is attached. Differently from this configuration, the operation button 120 may be attached to one surface of the PCB 116 to which at least one light emitter 118 is attached, or to side surface of the first safe keeping housing 112. The operation button 120 is connected electrically to the PCB 116 in order to light on/off the light emitter 118. Additionally, the operation button 120 is exposed outside through a hole (not shown) formed separately on the seat column 100 (see FIGS. 6A and 6B). At least one light emitter 118 may be lighted on/off using various ways depending on preset operation modes on a PCB circuit. That is, the light emitter 118 may be lighted all concurrently on, some lighted on, or some lighted on or off alternatively in a predetermined order.

[44] In FIGS. 3, 5 and 6, a configuration of the light emitting assembly and components making up the assembly are shown in detail.

[45] Referring to FIGS. 3, 5 and 6, an affixing groove 114 is formed lengthwise on both sides of an inner wall of the first safekeeping housing 112. Here, both sides of the PCB 116 are fitted into the affixing grooves 114, respectively, and thus the PCB 116 is housed inside the first safekeeping housing 112. Furthermore, since the first safekeeping housing is consisted of elastic material, and when the PCB 116 is fitted thereinto, it is to be opened slightly and then comes into initial shape with its recovery force, through which the PCB 116 is to be adhered firmly. At this time, a plurality of light emitter 118 attached to the PCB 116 is exposed outside through the second through-hole 124 of the first safekeeping housing 112. A light emitter protection lens 122, which intends to protect the light emitter which is partially exposed outside, is fitted into the first safekeeping housing 112. Here, the light emitter protection lens may be preferably made of transparent material. Preferably, the light emitter protection lens 122 is provided to the respective second though-hole 124.

[46] Referring back to FIG. 2, the power source assembly 130 is arranged inside the hollow bicycle seat column 100, and is connected electrically to the light emitting assembly 110 for supplying power thereto. The power source assembly 130 includes a second hollow safekeeping housing 132, a battery 134 and an electrode bracket 136. FIG. 4 shows the power source assembly in FIG.2, which is assembled.

[47] Referring to FIGS. 2 and 4, a conventional battery site (not shown) for housing the battery 134 is provided inside the second safekeeping housing 132, and the top end of which is connected to the PCB 116 with an electric wire. A plural of batteries 134 are arranged at the battery site and connected electrically to each other in a series. The battery 134 may be inserted preferably through the opened lower face of the hollow bicycle seat column 100. Here, the numbers of the battery can be varied and selected depending on necessity thereof. Two fitting holes 138 are formed adjacent to the lower end of the second safekeeping housing 132, into which both ends of the electrode bracket are fitted. As a result, the electrode bracket 136 allows the battery 134 not to descend inside the second safekeeping housing 132 by self- weight of the battery.

[48] Here, it has to be understood by those skilled in the art that, differently from the power source assembly 130 being adapted of the second hollow safekeeping housing 132, battery 134 and electrode bracket 136, the batteries cab be inserted and installed directly into the hollow bicycle seat column 100 without a separate safekeeping housing.

[49] Meanwhile, as shown in FIG. 2, a side light emitting assembly 140 is further provided on the outer peripheral surface of the hollow bicycle seat column 100 adjacent to the light emitting assembly 140. The side light emitting assembly 140 acts on guiding the light from the light emitting assembly 110 to be diverged sideward in order to improve visibility of the safe light flashing device according to the present invention. For this purpose, the side light emitting assembly 140 includes a side light body 142 and an afffixing band 144. The side light emitting assembly 142 may be made preferably of translucent material. The affixing bands 144 are provided on the upper end and lower end of the side light emitting assembly 140, respectively, for affixing the side light emitting assembly 142 to the hollow bicycle seat column 100. Here, it has to be understood by those skilled in the art that the side light body 142 may be affixed to the hollow bicycle seat column 100 using a prior fastening means such as screw.

[50] When the affixing bands 144 of the side light emitting assembly 140 are fitted into the hollow bicycle seat column 100, the side light body 142 is placed to cover a surface of the light emitter protection lens 122. As a result, the side light body 142 protrudes sideward with respect to the hollow bicycle seat column 100. The side light body 142 is made of translucent material, and the light from the light emitter 118 collide to the side light body 142 to reflect in a scattering. As a result, people can see the light from the light emitter 118 not only rearward but also sideward.

[51] FIG. 7 shows the PCB and light emitter assembled inside a hollow bicycle seat column. As shown in FIG. 7, the safe light flashing device for a bicycle according to the first embodiment of the present invention as aforementioned may be placed inside the hollow bicycle seat column 100 such that a portion of the light emitter 118 is exposed outside. Accordingly, since the light emitter 118 and printed circuit board 116 are placed inside the hollow bicycle seat column 100, avoiding damages caused from external impact.

[52] Differently from this configuration, as shown in FIG. 8, the safety light flashing device may be adapted such that the light emitting assembly 110 and power source assembly 130 except for the light emitter 118 are placed inside the hollow bicycle seat column 100. In other words, the light emitter 118 may be placed on radial external surface of the hollow bicycle seat column 100 to be exposed entirely outside. At this time, the light emitter 118 is connected electrically to the light emitting assembly 110 inside the hollow bicycle seat column 100. For clarity, the rest constitution thereof is omitted.

[53] Under the configuration of the safety light flashing device for a bicycle according to the first embodiment of the present invention as aforementioned, when a rider travels on a bicycle during periods of low light levels such as at dawn, dusk and at night, he/ she may light on/off the light emitter 118 depending on desired operation modes by operating the operation button 120 which is exposed outside the hollow bicycle seat column 100. At this time, the light emitter 118, which is arranged inside the hollow bicycle seat column 100 to expose a portion thereof, irradiates light with excellent visibility not only rearward, but also sideward with an aid of the side light emitting assembly 140.

[54] Meanwhile, a safety light flashing device according to a second preferred embodiment of the present invention is adapted such that the light emitting assembly is arranged outside the hollow bicycle seat column, differently from that described referring to FIGS. 1 to 8.

[55] The safety light flashing device according to the second preferred embodiment of the present invention includes a hollow bicycle seat column 300, a light emitting assembly placed outside the hollow bicycle seat column 300 and a power source assembly arranged inside the hollow bicycle seat column 300.

[56] As shown in FIGS. 9, 10 and 11, an elongated housing groove 302 for arranging the light emitting assembly is formed on one side of the radial external surface of the hollow bicycle seat column 300. As shown in FIG. 12, the light emitting assembly, that is, a PCB 310 and at least one light emitter 312 are arranged in the housing groove 302. Here, differently from this configuration, it has to be understood by those skilled in the art that a recess (not shown) for placing the PCB 310 and at least one light emitter 312 may be formed on one side of the radial external surface of the hollow bicycle seat column 300. The at least one light emitter 312 is connected electrically to the PCB 312 and installed integrally thereto. The light emitter 312 may be made preferably of LED. Additionally, the light emitter 312 can be lighted on/off in various ways depending on preset operation modes which is to be controlled by an electrical circuit in the PCB 310. As shown in FIG. 10, a protection cover 340 is placed outside the PCB 310 arranged inside the housing groove 302. The protection cover 340 is arranged on radial external surface of the hollow bicycle seat column 300 in such a way of surrounding the PCB 310 and at least one light emitter 312 in a state of being arranged inside the housing groove 302. Here, the protection cover 340 may be made preferably of translucent material.

[57] As shown in FIGS. 9 and 10, an operation button 314 is attached to a radial external surface of the hollow bicycle seat column 300. The operation button 314 is connected electrically to the PCB 310 to light on/off the light emitter 312. Additionally, the operation button 314 is exposed through a through-hole (not shown) which is formed separately on the hollow bicycle seat column 300.

[58] FIGS. 12 to 14 show various ways of assembling the power source assembly and light emitter of the safety light flashing device for a bicycle according to the second embodiment of the present invention.

[59] Referring to FIG. 12, the PCB 310 placed in the housing groove 302 which is formed on radial external surface of the bicycle seat column 300 is connected electrically to the power source assembly, that is, the battery 320, which is placed inside the bicycle seat column 300 through the electric wire 330 extending into the bicycle seat column 300 through the housing groove 302. The upper end of the battery site is connected electrically to the PCB 310 with the electric wire 330. The batteries 320 are arranged at the battery site and connected electrically to each other in a series. The battery 320 may be inserted preferably through the opened lower face of the hollow bicycle seat column 300. Here, the numbers of the battery 320 can be varied and selected depending on necessity thereof. As aforementioned, an electrode bracket is fitted to a location adjacent to the lower end of the hollow bicycle seat column 300 in order to prevent the battery 320 inserted inside the hollow bicycle seat column 300 from being descending by self- weight of the battery. Here, the constitution thereof is similar to that of the first embodiment of the present invention and thus description thereof is omitted.

[60] Meanwhile, referring to FIG. 13, a complementary groove 304 is formed on a location adjacent to the housing groove 302 outside the hollow bicycle seat column 300. A portion of the electric wire 330 is arranged on the complementary groove 304. In other words, one end of the electric wire 330 is connected electrically to the battery 320 placed inside the hollow bicycle seat column 300. The electric wire 330 extends outside through the opened upper end of the hollow bicycle seat column 300 and is arranged along the complementary groove 304 outside the hollow bicycle seat column 300. The other end of the electric wire 330 is connected electrically to the PCB 310.

[61] Alternatively, referring to FIG. 14, one end of the electric wire 330 is connected electrically to the battery 320 placed inside the hollow bicycle seat column 300. The electric wire 330 extends outside through the opened upper end of the hollow bicycle seat column 300 and further extends toward the PCB 310 without passing through any complementary groove at the outside the hollow bicycle seat column 300. The other end of the electric wire 330 is connected electrically to the PCB 310.

[62] Under the configuration of the safety light flashing device for a bicycle according to the second embodiment of the present invention as aforementioned, when a rider travels on a bicycle during periods of low light levels such as at dawn, dusk and at night, he/she may light on/off the light emitter 312 depending on desired operation modes by operating the operation button 314 which is exposed outside the hollow bicycle seat column 300. At this time, the light emitter 312, which is arranged outside the hollow bicycle seat column 300 to expose entire portion thereof, can irradiate light with excellent visibility not only rearward, but also sideward.

[63] While the present invention has been described particularly shown and described with reference to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be effected therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

[1] A safety light flashing device for a bicycle, comprising: a hollow bicycle seat column; a light emitting assembly for irradiating light outside, which is arranged inside the hollow bicycle seat column; and a power source assembly for supplying power to the light emitting assembly, which is connected electrically thereto.

[2] A safety light flashing device for a bicycle according to claim 1, further comprising a side light emitting assembly for diverging sideward the light which is irradiated from the light emitting assembly, which is placed adjacent to the light emitting assembly and provided on the external peripheral surface of the hollow bicycle seat column.

[3] A safety light flashing device for a bicycle according to claim 2, wherein the side light emitting assembly comprises a side body made of translucent material, and an affixing band for affixing the side body to the a hollow bicycle seat column.

[4] A safety light flashing device for a bicycle according to claim 1, wherein the light emitting assembly comprises; a first safe keeping housing both ends of which are opened lengthwise and on one side of which at least one second through-hole is formed; a PCB to be housed inside the first safe keeping housing; at least one light emitter for irradiating light outside, which is connected electrically to the PCB; and

*an operation button for controlling operations of the PCB and at least one of light emitters, which is exposed outside the hollow bicycle seat column.

[5] A safety light flashing device for a bicycle according to claim 4, wherein the light emitting assembly further comprises a protective lens for protecting the at least one light emitter, which is fitted to the first safe keeping housing outside the light emitter.

[6] A safety light flashing device for a bicycle according to claim 4, wherein an affixing groove is formed lengthwise on both inner sides of the first safe keeping housing and both sides of the PCB are fitted into the affixing groove, and thus the PCB is to be housed inside the first safe keeping housing.

[7] A safety light flashing device for a bicycle according to claim 4, wherein the power source assembly comprises: a second hollow safe keeping housing which is connected electrically to the PCB housed inside the first safe keeping housing and inside which a battery site for housing a battery is provided; a battery which is arranged in the battery site; and an electrode bracket for supporting the battery which is arranged in the battery site, which is fastened to the second safe keeping housing.

[8] A safety light flashing device for a bicycle according to claim 7, wherein the battery is inserted into the second safe keeping housing through the opened lower surface of the hollow bicycle seat column, and arranged inside the battery site.

[9] A safety light flashing device for a bicycle according to claim 7, wherein two fitting holes are formed a location adjacent to the lower end of the second safe keeping housing, and both ends of the electrode bracket are fitted into the two fitting holes after the battery is arranged inside the battery site.

[10] A safety light flashing device for a bicycle according to claim 4, wherein at least one through-hole is formed in the hollow bicycle seat column, which is corresponded to the at least one second through-hole which is formed on one side of the first safe keeping housing.

[11] A safety light flashing device for a bicycle according to claim 10, wherein the at least one light emitter is attached integrally to one surface of the PCB, a portion of which is exposed outside through the at least one second through-hole formed on one side of the firs safe keeping housing and the at least one first through-hole formed in the hollow bicycle seat column.

[12] A safety light flashing device for a bicycle according to claim 4, wherein the at lest one light emitter is arranged on radial external surface of the hollow bicycle seat column, and connected electrically to the light emitting assembly with electric wire.

[13] A safety light flashing device for a bicycle according to claim 12, wherein the electric wire is extended between the at least one light emitter and the light emitting assembly through the at least one second through-hole formed in one side surface of the first safe keeping housing.

[14] A safety light flashing device for a bicycle according to any one of claims 4 to

13, wherein the at least one light emitter comprises a light emitting diode.

[15] A safety light flashing device for a bicycle, comprising: a hollow bicycle seat column; a light emitting assembly for irradiating light outside, which is arranged outside the hollow bicycle seat column; and a power source assembly for supplying power to the light emitting assembly, which is connected electrically thereto.

[16] A safety light flashing device for a bicycle according to claim 15, wherein a housing groove for housing the light emitting assembly is formed on one radial external side of the hollow bicycle seat column. [17] A safety light flashing device for a bicycle according to claim 15, wherein the light emitting assembly comprises: a PCB to be inserted into the housing groove and arranged; at least one light emitter for irradiating light outside, which is connected electrically and attached integrally to the PCB; and an operation button for controlling operations of the PCB and at least one light emitter, which is exposed outside the hollow bicycle seat column. [18] A safety light flashing device for a bicycle according to claim 17, further comprises a protection cover for protecting the PCB and the at least one light emitter from external impact. [19] A safety light flashing device for a bicycle according to claim 18, wherein the protection cover is arranged to surround the PCB and at least one light emitter when the PCB and at least one light emitter is being housed in the housing groove. [20] A safety light flashing device for a bicycle according to claim 17, wherein the power source assembly comprises: a battery which is arranged in the battery site provided inside the hollow bicycle seat column; and an electrode bracket for supporting the battery which is arranged in the battery site, which is fastened to the lower radial external surface of the hollow bicycle seat column. [21] A safety light flashing device for a bicycle according to claim 20, wherein the battery is inserted into the hollow bicycle seat column through the opened lower surface of the hollow bicycle seat column, and arranged inside the battery site. [22] A safety light flashing device for a bicycle according to claim 20, wherein the

PCB is connected electrically to the battery provided in the battery site through an electric wire extending into the hollow bicycle seat column through the housing groove. [23] A safety light flashing device for a bicycle according to claim 20, wherein a complementary groove is formed on a location adjacent to the housing groove on a radial external surface of the hollow bicycle seat column, and the PCB is connected electrically to the battery through the electric wire extending into the hollow bicycle seat column through the complementary groove and opened upper end of the hollow bicycle seat column. [24] A safety light flashing device for a bicycle according to claim 20, wherein the

PCB is connected electrically to the battery through the electric wire extending into the hollow bicycle seat column through the opened upper end of the hollow bicycle seat column. [25] A safety light flashing device for a bicycle according to any one of claims 15 to

24, wherein the at least one light emitter comprises a light emitting diode.