WO2006047930A1

WO2006047930A1 - Projection lamp easy for focusing and positioning

Info

Publication number: WO2006047930A1
Application number: PCT/CN2005/001747
Authority: WO
Inventors: Xiaoling Luo
Original assignee: Xiaoling Luo
Priority date: 2004-11-08
Filing date: 2005-10-24
Publication date: 2006-05-11
Also published as: CN1603941A

Abstract

A projection lamp easy for focusing and positioning comprises a rack, a bulb and a reflection lens matched with the bulb. The bulb is located against the reflection lens with the bulb pole vertical to the light axis of the reflection lens and is fixed against to the lens through a position apparatus. The said reflection lens is an ellipsoid lens or a paraboloid lens or a composition lens.

Description

Easy-focusing projection lamp

The invention relates to a projection lamp for a projection system, in particular to a projection lamp for conveniently replacing a bulb and focusing positioning.

Background technique

The illumination device in a variety of projection systems, such as slide projectors, projectors, projection televisions, film projectors, and physical exhibition stands, usually consists of two parts: a light bulb and a mirror. The light emitted by the light bulb is reflected by the mirror and then predetermined. The direction is launched.

Generally, the lamp bulb can be divided into single-ended and double-ended, and the existing projection system mainly uses a double-ended bulb. The so-called double-ended bulb means that the bubble is in the middle, and the two ends of the bubble lead to a long electrode; and, the two electrodes are respectively wrapped by the glass column.

The lamp of the existing projection lamp is mounted and matched with respect to the mirror. As shown in FIG. 1 , the bulb 1 is vertically inserted into the tail hole 21 at the bottom of the mirror 2, and is bonded to the mirror by a high temperature resistant adhesive. The illumination device is provided with a light source for the projection system, and the bulb of the projection lamp is directly mounted with respect to the mirror, that is, the electrode of the bulb is coaxial with the optical axis of the projection lamp, and the bubble body is on the optical axis. In order to secure the mirror in the projection system, a special bracket is also required which supports and secures the mirror so that it is fixed in the projection system in a predetermined direction.

Such a projection lamp has the following disadvantages:

(1) It is difficult to adjust the focus of the bulb relative to the mirror when replacing the bulb, resulting in an increase in the maintenance cost of the user. Because of the current technical reasons, the error of the bulb in its axial direction is large. In the current projection lamp, the bulb and the mirror are coaxial when the bulb is directly mounted, and the bulb of the bulb is usually required to be located near the focus of the mirror, and the bulb is produced in the axial direction. A large error will cause the bubble to deviate from the predetermined position of the mirror in the direction of the optical axis. When the mirror is an ellipsoidal or parabolic mirror in the curved mirror, the quality of the output light is in the direction of the optical axis of the bulb. The deviation is very sensitive, and the focus of the bulb directly affects the projection effect, including uniformity and brightness. Therefore, in order to ensure the accuracy of the position of the replaced lamp bubble body in the direction of the optical axis of the mirror, accurate focus positioning must be performed. The work of focusing and positioning must be completed by a special technician and equipment, and the time is very delayed. At most, only manufacturers can do it. Therefore, the general maintenance mechanism can only use the mirror and the bulb (some even with the bracket) to replace the whole, which greatly increases the maintenance cost and increases the burden on the customer.

(2) Once the lamp is damaged, it is difficult to replace. Because you need to replace the lamp, you must first remove the entire lamp and bracket from the projection system, then remove the bracket, remove the adhesive, remove the old bulb, and then reinsert the new bulb into the rear hole of the mirror. After the focus positioning, the adhesive is applied again, and the adhesive can be re-assembled before being placed in the projection system. It can be seen that replacing the bulb is very time consuming.

Summary of the invention

The object of the present invention is to provide a projection lamp that is easy to focus and focus on the problem of the difficulty in focusing and positioning of the bulb and the mirror in the direct mounting manner of the conventional projection lamp, and the projection lamp can ensure the replacement of the bulb. The convenient and accurate focus positioning of the bulb in the direction of the optical axis of the mirror is convenient for the replacement of the bulb by the user or the maintenance mechanism.

The easy-focusing and positioning projection lamp provided by the invention adopts the following technical solutions: an easy-focusing projection lamp, comprising a bracket, a bulb and a mirror matched with the bulb, wherein: the bulb pole axis is perpendicular to the mirror The optical axis is mounted in cooperation with the mirror and is fixed relative to the mirror by a positioning device, which is an ellipsoidal mirror or a parabolic mirror or a combined mirror. The two ends of the bulb can be positioned on the mirror by the positioning device. Preferably, both ends of the bulb are mounted on the bracket by the positioning device.

The positioning device may have a structure in which the positioning device is composed of two mounts that can be mounted and fixed to the bracket and a connector that is mounted at both ends of the bulb in the mount.

The combined mirror refers to a mirror combined with a spherical surface and an ellipsoidal surface or a mirror combined with a spherical surface and a paraboloid.

The easy-focusing positioning projection lamp provided by the present invention has the following beneficial effects as compared with the prior art in which the bulb is directly mounted:

(1) Since the bulb axis is mounted perpendicular to the optical axis of the mirror relative to the mirror, the machining error of the bulb on its polar axis only affects the position of the bulb in the vertical direction of the optical axis of the mirror without affecting The position of the mirror in the optical axis direction of the output light of the lamp is sensitive. Therefore, the processing error of the lamp of this installation mode has no influence on the output light quality of the lamp, so there is no need for professionals and The special equipment is used for focusing and positioning, and the lamp can be replaced by the maintenance organization or even the user. When replacing the lamp, only the lamp needs to be replaced, which not only facilitates the user but also reduces the maintenance cost of the user.

(2) The bulb is mounted on the projection lamp by a positioning device consisting of a mounting seat and a mounting head. It does not need to be bonded with an adhesive, so the installation and disassembly is very convenient and quick.

DRAWINGS

1 is a schematic view showing the mutual installation structure of a bulb and a mirror of a projection lamp in the prior art;

2 is a schematic view showing the installation relationship between a bulb and a mirror of the easy-focusing projection lamp of the present invention;

3 is a connection head structure of one end of a projection lamp bulb with easy focus positioning according to the present invention; Schematic diagram

4 is a schematic view showing the structure of a connector at the other end of the easy-focusing projection lamp bulb of the present invention;

FIG. 5 is a schematic structural view of a mounting bracket corresponding to the connector shown in FIG. 3 in the easy-focusing positioning projection lamp of the present invention; FIG.

6 is a schematic structural view of a mounting bracket corresponding to the plug shown in FIG. 4 in the easy-focusing positioning projection lamp of the present invention;

FIG. 7 is a schematic view showing the assembly of the easy-focusing and positioning projection lamp of the present invention.

detailed description

The easy-focusing projection lamp of the present invention will be further described below in conjunction with the accompanying drawings and a preferred embodiment to facilitate an understanding of the present invention.

As shown in FIG. 2, the lamp for replacing the bulb includes a bracket (not shown), a bulb 1 and a mirror 2 matched with the bulb. The polar axis of the bulb 1 is perpendicular to the optical axis of the mirror 2 and is transverse to the mirror 2. In cooperation with the installation, the mirror 2 has two holes 22 for passing through the bulb 1, and the mirror 2 is an ellipsoidal mirror or a parabolic mirror or a combined mirror. Since the bulb 1 is mounted horizontally, its position on the optical axis is determined by the positioning device of the bulb and the position of the two holes 22 on the mirror 2, which is designed and fixed at the time of leaving the lamp, so the bulb is replaced. It can ensure that the installation position of the bulb of the lamp in the optical axis direction of the mirror 2 is constant, and the bulb is installed at a predetermined position near the focus of the mirror. This lateral mounting method is caused by the processing process of the projection lamp in the polar axis. The error in the direction also affects only the position of the projection lamp perpendicular to the optical axis, and for the ellipsoidal mirror or the parabolic mirror, the deviation of the projection lamp bulb 1 in the direction perpendicular to the optical axis of the mirror 2 is output. The quality of the light has little effect. Therefore, in this way, the replacement of the bulb does not affect the quality of the output light due to the error of the processing of the projection lamp, and can be entered by the user or the maintenance organization. Line replacement, without the need for precise focus positioning by professionals and equipment, and the need to replace the mirror 2 or even the bracket, so it is convenient to replace the bulb, reduce the time required, and reduce replacement and maintenance. cost.

As can be seen from Fig. 2, the projection lamp needs to open two holes 22 symmetrically on the mirror 2, but the tail hole 21 in Fig. 1 is not required. The relative fixation between the mirror 2 and the bulb 1 is accomplished by means of a bracket. The mirror 2 and the bulb 1 can be respectively fixed on the bracket, so that the bulb 1 can be individually pulled out or inserted from the two holes 22 opened in the mirror wall even if the mirror 2 and the bracket are not unloaded, and the replacement is very convenient. . If only one hole is opened in the mirror wall, the bulb can only be fixed at one end, stability and reliability, and light symmetry are reduced, and it is difficult to electrically connect the electrodes at both ends.

Since the bulb 1 is generally mounted near the focus of the mirror 2, when the focus is short, that is, closer to the bottom of the mirror, a method of symmetric opening as shown in Fig. 2 is preferred; and when the focus is long, it is close to At the edge of the mirror 2, it is conceivable to open a properly symmetrical notch (not shown) at the edge of the mirror 2 to facilitate the passage of the bulb. When the focal point is longer and grows beyond the edge of the mirror 2 (this is a waste of light), there is no need to open the hole.

The bulb 1 can be fixed to the mirror 2, for example, the glass rods of the two ends of the bulb 1 can be adhered to the outer surface of the mirror as in the prior art by means of an adhesive, or can be arranged on the mirror. There is a socket for mounting two electrodes, but in a more ideal manner, it is mounted on the bracket by a positioning device, so that it can be adapted to a mirror with a short focus or a long focal point, for example, to the edge of the mirror. The situation, and the mounting of the positioning device on the bracket is more powerful than on a thinner mirror. Easy and easy to connect wires. The positioning device can adopt the jack socket mode of the existing fluorescent lamp. The invention adopts the positioning device shown in FIG. 3 to FIG. 6 , and the connection head structure at both ends of the bulb and the safety device mounted on the bracket The structure of the mounting structure, as shown in FIG. 3, the connecting rod 3 at one end of the bulb is a glass rod 11 of one electrode end of the bulb inserted in a metal sleeve 31, and the electrode 12 is inserted into a hollow metal at the bottom of the metal sleeve 31. The screw 32 is threaded out of the screw 32, and the piercing portion can be welded to the end of the screw 32 to keep the screw 32 and the electrode 12 conductive. The inner diameter of the metal sleeve 31 is slightly larger than the outer diameter of the glass column 11 of the bulb to facilitate penetration, and the gap between the glass column 11 and the sleeve 31 is filled with an adhesive for reinforcement. The mounting seat 4 mated with the end is formed by a hollow metal threaded metal cylinder 41 and a metal plate 42 as shown in FIG. 5. The bottom of the cylinder 41 is welded to the metal plate 42, or the metal plate 42 and the metal cylinder 41 are In a unitary structure, the thread in the metal cylinder 41 cooperates with the external thread of the screw 32 at the electrode end of the bulb, and the screw 32 can be screwed into the cylinder 41 to be tightened in diameter, and the metal plate has a positioning hole 43 so as to be mounted on the bracket.

As shown in FIG. 4, at the other electrode end of the bulb, there is a connector 5, which also includes a metal sleeve 51. The bottom of the bottom of the metal sleeve 51 has a through hole, and the electrode 12 passes through the through hole. Thereafter, the sleeve 51 is welded to the sleeve 51 and the electrode 12 to conduct electricity. The gap between the sleeve 51 and the glass column 11 should also be filled with an adhesive to be fixed. The electrode 12 should not be worn too long relative to the sleeve 51, so that it is preferred to expose the head. The mounting seat 6 mated with the end is composed of a hollow metal cylinder 61 and a metal plate 62 as shown in Fig. 6. There is an elastic member at the bottom of the metal cylinder 61. In this embodiment, the elastic member is a spring piece 64. It can also be a spring or other conductive element with certain elasticity to elastically contact the sleeve 51 of the electrode end, which has the advantages of being able to adapt to the possible axial error of the bulb, and the thermal expansion and contraction during use. The situation causes a small change in the length of the bulb in the direction of the polar axis, and also ensures that the bulb 1 is not crushed when the other end is pressed too tightly. A positioning hole 63 is formed in the metal plate 62 to be fixed to the bracket by a screw or the like.

The installation method is as follows: First, the mounting seat 6 at one end is mounted to the mounting hole 63 by its positioning hole 63 On the bracket of the projection lamp (omitted from the drawing), a side hole 22 is formed on the mirror 2, and the direction of the opening of the cylinder 61 is directed into the mirror 2. Then screw the screw 32 at the other end of the bulb into the internally threaded metal cylinder 41 of its mount 4, hand-held the mount 4, insert the bulb 1 from the opening on the other side of the mirror 2, and make it from the mirror The opening in which the mount 6 is mounted is passed through, and the end thereof just enters the cylinder 61 of the mount 6 mounted at the opening, so that the front end abuts against the spring piece 64. The bulb 1 is then secured to the bracket by a locating hole 43 in the mount 4. The positioning of the bulb is completed. The process of disassembling the lamp is the reverse of the installation process.

The above-mentioned one end of the bulb is mounted on the bracket through the thread structure, and the other end is positioned by the spring piece and the metal cylinder, thereby ensuring the stable installation of the bulb through the thread structure and preventing the processing error of the bulb and the influence of thermal expansion and contraction during use. , can achieve a good overall effect, but the same mount or connector at both ends of the bulb is also feasible under certain conditions of use.

The installation method is low in cost, simple and practical. The shape of the bottom metal plates 42 and 62 of the mount can be a rectangular shape as illustrated in the embodiment. In practical applications, the fit of the mirror mount can be adjusted to be elliptical, rhombic or other three-dimensional shape. The positions of the positioning holes 43, 63 can also be adjusted as needed.

Claims

Rights request

1 . An easy-focusing projection lamp, comprising a bracket, a bulb and a mirror matched with the bulb, wherein: the bulb pole axis is perpendicular to the optical axis of the mirror and is mounted relative to the mirror, and passes through The positioning device is fixed relative to the mirror, and the mirror is an ellipsoidal mirror or a parabolic mirror or a combined mirror.

2. The easy-focusing projection lamp of claim 1 wherein: said two ends of said bulb are positioned on said bracket by said positioning means.

3. The easy-focusing positioning projection lamp according to claim 2, wherein: said positioning device comprises two mounting seats fixed to the bracket and a connector at both ends of the bulb mounted in the mounting seat. composition.

4. The easy-focusing projection lamp of claim 3, comprising: a metal sleeve, a glass column at the electrode end of the bulb is inserted into the sleeve, and the electrode is inserted at the bottom of the metal sleeve. a hollow metal screw penetrates from the screw, and the piercing portion is welded to the end of the screw; the mounting seat is composed of a hollow metal threaded metal cylinder and a metal plate, and the bottom of the cylinder is connected with the metal plate, and the metal cylinder is connected The thread is matched with the external thread of the screw at the electrode end of the bulb, and the positioning hole on the metal plate is screwed to the bracket.

5. The easy-focusing projection lamp of claim 3, wherein: the connector at both ends of the bulb and the mounting base are the same connector and the mounting bracket, the connector includes a metal sleeve, metal The bottom of the sleeve has a through hole at the center of the sleeve, and the electrode is connected to the sleeve through the through hole; the mounting seat is composed of a hollow metal cylinder and a metal plate, and an elastic member and the connector are arranged at the bottom of the metal cylinder. The sleeve is in elastic contact, and a positioning hole is fixed on the metal plate with a screw.

6. The easy-focusing positioning projection lamp of claim 3, wherein: The connector at one end of the bulb includes a metal sleeve into which the glass column at the electrode end of the bulb is inserted, and the electrode is inserted into a hollow metal screw at the bottom of the metal sleeve and pierced from the screw. The part is welded to the end of the screw. The end mounting seat is composed of a hollow metal threaded metal cylinder and a metal plate. The bottom of the cylinder is connected with the metal plate, and the thread in the metal cylinder is matched with the external thread of the screw at the electrode end of the bulb. The metal plate has a through hole and is mounted on the bracket through the through hole; the other end of the connector includes a metal sleeve, and the bottom of the metal sleeve has a through hole at a central position thereof, and the electrode passes through the through hole and is connected to the sleeve. The mounting seat of the end is composed of a hollow metal cylinder and a metal plate. At the bottom of the metal cylinder, an elastic member is elastically contacted with the sleeve of the connecting head, and a positioning hole on the metal plate is fixed with the bracket by a screw.

The easy-focusing projection lamp according to claim 5 or 6, wherein the elastic member is a spring piece or a spring.

The easy-focusing projection lamp according to claim 1 or 2, wherein: the mirror is symmetrically opened with a through hole, and the bulb passes through a through hole in the mirror.

9. The easy-focusing positioning projection lamp according to claim 1 or 1, wherein: the bulb of the bulb is spherical or ellipsoidal, tubular.