US20070119607A1 - Power hand tool - Google Patents
Power hand tool Download PDFInfo
- Publication number
- US20070119607A1 US20070119607A1 US11/289,284 US28928405A US2007119607A1 US 20070119607 A1 US20070119607 A1 US 20070119607A1 US 28928405 A US28928405 A US 28928405A US 2007119607 A1 US2007119607 A1 US 2007119607A1
- Authority
- US
- United States
- Prior art keywords
- sighthole
- housing
- gearshift
- gear set
- changing gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
Abstract
A power hand tool includes a housing containing a motor, a speed changing gear set coupled to the power output end of the motor, a transmission mechanism coupled to the speed changing gear set and partially extending out of the housing for operation by the user to selectively shift the speed changing gear set to one of a series of gearshift positions thereof, a set of index signs marked on the transmission mechanism corresponding to the series of gearshift positions and alternatively moved to a sighthole in the housing subject to the gearshift position of the speed changing gear set, and a light emitting device mounted in the housing adjacent to the sighthole for illuminating one index sign of the transmission mechanism that is in alignment with the sighthole.
Description
- 1. Field of the Invention
- The present invention relates to a hand tool and more particularly, to a power hand tool having a transmission position indicator (gearshift position indicator) that can be recognized clearly.
- 2. Description of the Related Art
- Regular power hand tools are commonly provided with a multi-step speed changer (transmission) that is controllable to change the revolving speed of the output shaft subject to different working requirements.
- The multi-step speed changer of a conventional power hand tool has an operating knob disposed at one side for operation by the user to change the gearshift position. The operating knob has marked thereon index signs, for example, H for high speed, M for standard speed and L for low speed, or a series of numerical signs such as 1, 2, 3, etc. for indicating the current gearshift position. However, one may work with a power hand tool in the night or under a dark environment. When working in the night or under a dark environment, the user may be unable to see the indication of the respective index sign well. If the user directly uses the power hand tool that is shifted to a wrong gearshift position (wrong revolving speed), a working mistake or accidental injury may occur.
- The present invention has been accomplished under the circumstances in view. It is therefore an object of the present invention to provide a power hand tool, which enables the user to see the adjusted gearshift position clearly when in the dark.
- To achieve this object of the present invention, the power hand tool comprises a housing having a through hole and a sighthole, a motor fixedly mounted inside the housing and having a power output end, a multi-step speed changer, and an indicator. The multi-step speed changer has a speed changing gear set coupled to the power output end of the motor, and a transmission mechanism coupled to the speed changing gear set and partially extending out of the through hole of the housing for operation by the user to selectively shift the speed changing gear set to one of a series of gearshift positions thereof. The transmission mechanism has a series of index signs corresponding to the gearshift positions, and the index signs are alternatively moved to the sighthole subject to the gearshift positions of the speed changing gear set. The indicator has a light emitting device mounted in the housing adjacent to the sighthole for illuminating one of the index signs of the transmission mechanism that is moved to the sighthole.
-
FIG. 1 is a perspective view of a power hand tool according to a preferred embodiment of the present invention, wherein a part of the housing is removed for illustration purpose. -
FIG. 2 is a side view ofFIG. 1 . -
FIG. 3 is top view of the power hand tool according to the preferred embodiment of the present invention. -
FIG. 4 is similar toFIG. 3 but showing the gearshift position changed. - Referring to
FIGS. 1-4 , a power hand tool in accordance with a preferred embodiment of the present invention is shown comprising ahousing 10, amotor 20, amulti-step speed changer 30, anindicator 40, and abattery pack 50. - The
housing 10 has a throughhole 11 and asighthole 12 at one side, for example, the top side. Further, thehousing 10 defines therein a plurality of receiving chambers. - The
motor 20 is fixedly mounted inside thehousing 10, having a power output end for output of a rotary driving force to the outside. - The
multi-step speed changer 30 comprises a speed changinggear set 31 and atransmission mechanism 32. The speed changinggear set 31 is mounted inside thehousing 10 and coupled to the power output end of themotor 20 for selectively changing the rotary driving force (constant revolving speed) to different revolving speeds (because this speed changing gear set is of the known art, no further detailed description in this regards is necessary). Thetransmission mechanism 32 comprises agearshift control bar 321 and atransmission shaft 322. Thegearshift control bar 321 is axially slidably mounted inside thehousing 10, having anoperating knob 323 disposed at one side thereof and extending through the throughhole 11 to the outside of thehousing 10 for operation by an external force (the user) to move thegearshift control bar 321 axially forwards or backwards. Thegearshift control bar 321 has marked thereon index signs 324 (for example, H/M/L, or a series of numerical signs such as 1, 2, 3, etc.) corresponding to the gearshift positions provided by the speed changinggear set 31. Through thesighthole 12, one of theindex signs 324 can be seen. Thetransmission shaft 322 has the two distal ends thereof respectively coupled to the speed changinggear set 31 and thegearshift control bar 321. When operating theoperating knob 323 to move thegearshift control bar 321, thetransmission shaft 322 is moved to change the gearshift position and at the same time thecorresponding index sign 324 is moved into alignment with thesighthole 12. Therefore, when operating theoperating knob 323 to change the gearshift position (revolving speed), the user can see thecorresponding index sign 324 through thesighthole 12. - The
indicator 40 comprises alight emitting device 41 and a light-transmissible covering 42. Thelight emitting device 41 according to this embodiment is an LED (light emitting diode) mounted in thehousing 10 near thesighthole 12. The light-transmissible covering 42 according to this embodiment is a convex lens mounted in thesighthole 12 and adapted to magnify the image of theindex sign 324 that is visible through thesighthole 12. - The
battery pack 50 is mounted inside thehousing 10 and electrically coupled to themotor 20 and thelight emitting device 41 of theindicator 40 to provide themotor 20 and thelight emitting device 41 with the necessary working voltage, enabling themotor 20 to provide a rotary driving force and thelight emitting device 41 to give off light. - The operation of the present invention is outlined hereinafter with reference to
FIGS. 3 and 4 again. When operating theoperating knob 323 to shift thegearshift control bar 321 and to further drive thetransmission shaft 322 to change the gearshift position, thecorresponding index sign 324 is moved into alignment with thesighthole 12, and at the same time the light emitted from thelight emitting device 41 will stream on theindex sign 324, and therefore the user can see thecorresponding index sign 324 through the light-transmissible covering 42. By means of the illumination of thelight emitting device 41 and the magnifying effect of the light-transmissible covering 42, the user can see thecorresponding index sign 324 clearly when working in the dark.
Claims (6)
1. A power hand tool comprising:
a housing having a through hole and a sighthole;
a motor fixedly mounted inside said housing, said motor having a power output end for outputting a rotary driving force at a predetermined revolving speed;
a multi-step speed changer having a speed changing gear set coupled to the power output end of said motor, and a transmission mechanism coupled to said speed changing gear set and partially extending out of said through hole of said housing for operation by the user to selectively shift said speed changing gear set to one of a series of gearshift positions thereof, said transmission mechanism having a series of index signs corresponding to said gearshift positions, said index signs being alternatively moved to said sighthole subject to the gearshift positions of said speed changing gear set; and
an indicator having a light emitting device mounted in said housing adjacent to said sighthole for illuminating one of said index signs of said transmission mechanism that is moved to said sighthole.
2. The power hand tool as claimed in claim 1 , further comprising a battery pack mounted inside said housing and electrically coupled to said motor and said light emitting device to provide the necessary working electricity to said motor and said light emitting device.
3. The power hand tool as claimed in claim 1 , wherein said indicator further comprises a light-transmissible covering mounted in said sighthole for magnifying the image of the index sign of said transmission mechanism that is moved to said sighthole.
4. The power hand tool as claimed in claim 3 , wherein said light-transmissible covering is a convex lens.
5. The power hand tool as claimed in claim 1 , wherein said transmission mechanism comprises a gearshift control bar axially slidably mounted inside said housing, said gearshift control bar having an operating knob disposed at one side thereof and extending out of said housing through said through hole for operation by the user to move said gearshift control bar axially forwards or backwards, and a transmission shaft coupled between said speed changing gear set and said gearshift control bar and movable by said gearshift control bar to change the gearshift position of said speed changing gear set; wherein said index signs are marked on said gearshift control bar and alternatively shifted with said gearshift control bar to said sighthole.
6. The power hand tool as claimed in claim 1 , wherein said light emitting device is a light emitting diode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/289,284 US20070119607A1 (en) | 2005-11-30 | 2005-11-30 | Power hand tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/289,284 US20070119607A1 (en) | 2005-11-30 | 2005-11-30 | Power hand tool |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070119607A1 true US20070119607A1 (en) | 2007-05-31 |
Family
ID=38086316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/289,284 Abandoned US20070119607A1 (en) | 2005-11-30 | 2005-11-30 | Power hand tool |
Country Status (1)
Country | Link |
---|---|
US (1) | US20070119607A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080271904A1 (en) * | 2007-05-03 | 2008-11-06 | Mobiletron Electronics Co., Ltd. | Power hand tool |
US20110289998A1 (en) * | 2010-05-28 | 2011-12-01 | Link-tech (Tianjin) Metal Products Co., Ltd. | Crimping/cutting Working Head for Impact Wrench |
US20120222878A1 (en) * | 2006-02-03 | 2012-09-06 | Black & Decker Inc. | Power tool with transmission cassette received in clam shell housing |
JP2017213621A (en) * | 2016-05-30 | 2017-12-07 | マックス株式会社 | Electric tool |
Citations (17)
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US2525588A (en) * | 1946-12-12 | 1950-10-10 | Leroy F Cameron | Illuminated electric drill and the like |
US4689534A (en) * | 1979-06-28 | 1987-08-25 | Scintilla Ag | Electrically driven hand-operated tool |
US5339908A (en) * | 1990-10-02 | 1994-08-23 | Ryobi Limited | Power tool |
US5903462A (en) * | 1996-10-17 | 1999-05-11 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Computer implemented method, and apparatus for controlling a hand-held tool |
US5954458A (en) * | 1998-07-10 | 1999-09-21 | Test Rite Products Corporation | Cordless drill with adjustable light |
US6168287B1 (en) * | 1999-03-09 | 2001-01-02 | Kuo-Chen Liu | Combination of an electric-powered tool and an illuminating device received in the tool |
US6308378B1 (en) * | 1999-06-01 | 2001-10-30 | Porter-Cable Corporation | Frictional gripping arrangement for a power tool handle |
US6502949B1 (en) * | 2000-04-21 | 2003-01-07 | Makita Corporation | Adapters for use with an electric power tool |
US6517295B2 (en) * | 2000-05-15 | 2003-02-11 | Yuan-Ho Lin | Power drill housing and chuck rotation |
US6729743B2 (en) * | 2001-09-21 | 2004-05-04 | Jay V Gillette | Flashlight with bracket device for cordless drill |
US6729414B2 (en) * | 2002-07-16 | 2004-05-04 | Black & Decker Inc. | Cordless drill with metal housing |
US20050044728A1 (en) * | 2003-08-26 | 2005-03-03 | Credo Technology Corporation | Power hand tool right angle attachment having a light source with a self-generating power supply |
US6979155B2 (en) * | 2000-02-10 | 2005-12-27 | One World Technologies Limited | Hand-held power tool having a detecting device |
US7028784B2 (en) * | 2003-03-31 | 2006-04-18 | Hilti Aktiengesellschaft | Motor-driven hand-held tool with functional step display |
US7036703B2 (en) * | 2003-01-27 | 2006-05-02 | Hilti Aktiengesellschaft | Hand-held working tool |
USD525847S1 (en) * | 2005-03-31 | 2006-08-01 | Campbell Hauseld/Scott Fetzer Company | Portion of an electric drill |
US7094011B2 (en) * | 2000-02-17 | 2006-08-22 | Credo Technology Corporation | Power tool |
-
2005
- 2005-11-30 US US11/289,284 patent/US20070119607A1/en not_active Abandoned
Patent Citations (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2525588A (en) * | 1946-12-12 | 1950-10-10 | Leroy F Cameron | Illuminated electric drill and the like |
US4689534A (en) * | 1979-06-28 | 1987-08-25 | Scintilla Ag | Electrically driven hand-operated tool |
US5339908A (en) * | 1990-10-02 | 1994-08-23 | Ryobi Limited | Power tool |
US5903462A (en) * | 1996-10-17 | 1999-05-11 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Computer implemented method, and apparatus for controlling a hand-held tool |
US5954458A (en) * | 1998-07-10 | 1999-09-21 | Test Rite Products Corporation | Cordless drill with adjustable light |
US6168287B1 (en) * | 1999-03-09 | 2001-01-02 | Kuo-Chen Liu | Combination of an electric-powered tool and an illuminating device received in the tool |
US6308378B1 (en) * | 1999-06-01 | 2001-10-30 | Porter-Cable Corporation | Frictional gripping arrangement for a power tool handle |
US6979155B2 (en) * | 2000-02-10 | 2005-12-27 | One World Technologies Limited | Hand-held power tool having a detecting device |
US7094011B2 (en) * | 2000-02-17 | 2006-08-22 | Credo Technology Corporation | Power tool |
US6502949B1 (en) * | 2000-04-21 | 2003-01-07 | Makita Corporation | Adapters for use with an electric power tool |
US6517295B2 (en) * | 2000-05-15 | 2003-02-11 | Yuan-Ho Lin | Power drill housing and chuck rotation |
US6729743B2 (en) * | 2001-09-21 | 2004-05-04 | Jay V Gillette | Flashlight with bracket device for cordless drill |
US6729414B2 (en) * | 2002-07-16 | 2004-05-04 | Black & Decker Inc. | Cordless drill with metal housing |
US7036703B2 (en) * | 2003-01-27 | 2006-05-02 | Hilti Aktiengesellschaft | Hand-held working tool |
US7028784B2 (en) * | 2003-03-31 | 2006-04-18 | Hilti Aktiengesellschaft | Motor-driven hand-held tool with functional step display |
US20050044728A1 (en) * | 2003-08-26 | 2005-03-03 | Credo Technology Corporation | Power hand tool right angle attachment having a light source with a self-generating power supply |
USD525847S1 (en) * | 2005-03-31 | 2006-08-01 | Campbell Hauseld/Scott Fetzer Company | Portion of an electric drill |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120222878A1 (en) * | 2006-02-03 | 2012-09-06 | Black & Decker Inc. | Power tool with transmission cassette received in clam shell housing |
US9579785B2 (en) * | 2006-02-03 | 2017-02-28 | Black & Decker Inc. | Power tool with transmission cassette received in clam shell housing |
US10987793B2 (en) | 2006-02-03 | 2021-04-27 | Black & Decker Inc. | Power tool with tool housing and output spindle housing |
US20080271904A1 (en) * | 2007-05-03 | 2008-11-06 | Mobiletron Electronics Co., Ltd. | Power hand tool |
US20110289998A1 (en) * | 2010-05-28 | 2011-12-01 | Link-tech (Tianjin) Metal Products Co., Ltd. | Crimping/cutting Working Head for Impact Wrench |
US8342001B2 (en) * | 2010-05-28 | 2013-01-01 | Link-tech (Tianjin) Metal Products Co., Ltd. | Crimping/cutting working head for impact wrench |
JP2017213621A (en) * | 2016-05-30 | 2017-12-07 | マックス株式会社 | Electric tool |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MOBILTRON ELECTRONICS CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LIN, YUNG-TSUNG;REEL/FRAME:017294/0224 Effective date: 20051121 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |