TWI309332B - Projector and the fixing mechanism of a light pipe thereof - Google Patents

Description

130113⁄4 : TW1600PA VIII. If there is a chemical formula in this case, please disclose the chemical formula that best shows the characteristics of the invention: No. 9. Description of the invention: The present invention relates to a projector and a light guide positioning mechanism thereof, and In particular, there is a projector for positioning a light guide tube on a light machine housing and a positioning mechanism thereof. [Prior Art] The projector has the advantages of large-size images and easy portability, and has become the best image display device for office briefings or home theaters. Conventional projectors include a light bulb, a light pipe, a light machine housing, and a Digital Micromirror Device (DMD). The light bulb is mounted in the housing of the optical machine and provides a light source and the light guide tube is assembled on the optical housing. The light pipe is one of the important optical components in the projector. The main function of the light pipe is to guide the light source into parallel light with a rectangular cross section. The projector is projected onto the digital micromirror element by parallel light to produce a reflected image. Both the optomechanical housing and the light pipe have a certain range of component dimensional tolerances. When the light guide tube is assembled on the light machine housing and the light guide tube is not disposed at the correct position, the parallel light emitted through the light guide tube will not be accurately projected onto the digital micromirror device. Therefore, the light pipe must be accurately positioned at the correct position of the casing of the machine to accurately project rectangular parallel light onto the digital micromirror element. In the projector assembly process, the dream of adjusting the positioning must be performed. 6

TW1600PA. There is a first fine adjustment screw and a second fine adjustment screw between the traditional light pipe and the light machine housing. The first fine adjustment screw is used to adjust the position of the light guide tube in the first direction, and the second fine adjustment screw is used to adjust the position of the light guide tube in the second direction. The first direction is perpendicular to the central axis direction of the light pipe, and the second direction is perpendicular to the first direction and the central axis direction. However, the conventional projector only adjusts the positioning positions of the first direction and the second direction. During the fine-tuning process or during use of the assembly, the light pipe may be offset in the direction of the central axis, leaving the correct position away from the central axis. A position that is not φ correct will cause parallel light to be accurately projected onto the digital micromirror element, resulting in a lower imaging quality of the projector. SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a projector and a light pipe positioning mechanism thereof, which use a positioning plate to penetrate a bearing plate, and an assembler can finely adjust the light pipe edge by moving the positioning plate. The position in the direction of the central axis. It can prevent the projector from shifting in the direction of the central axis during the assembly trimming process or during use. Not only can the accuracy of the light pipe assembly be increased, but also the quality of the projector image can be greatly improved. . In accordance with the purpose of the present invention, a positioning mechanism is provided for positioning a light pipe on a light machine housing. The optomechanical housing has a housing surface and a bearing plate. The bearing plate is protruded from the surface of the casing, and the bearing plate has a through opening. The positioning mechanism includes a clamping member and a light guide housing. The clamping component is coupled to the housing of the optical machine and defines an accommodation space with the bearing plate. The light pipe is disposed in the accommodating space. The light guide tube shell is wrapped around the light guide tube, and 7

: TW1600PA has a positioning plate. When the light guide tube is clamped between the clamping member and the bearing plate, the positioning plate passes through the through opening, and the assembler can move the positioning plate to finely adjust the position of the light guiding tube along a central axis of the light guiding tube. According to still another object of the present invention, a projector is provided comprising a light pipe, a light machine housing and a positioning mechanism. The optomechanical housing has a housing surface and a bearing plate. The bearing plate is protruded from the surface of the casing, and the bearing plate has a through opening. The positioning mechanism is used to position and adjust the light pipe. The positioning mechanism includes a clamping member and a light guide housing. The clamping member is lightly attached to the housing of the optical machine and defines an accommodation space with the bearing plate. The light pipe is disposed in the accommodating space. A light guide housing is wrapped around the light guide tube and has a positioning plate. When the light guide tube is clamped between the clamping member and the bearing plate, the positioning plate passes through the through opening, and the assembler can move the positioning plate to finely adjust the position of the light guiding tube along a central axis direction of the light guiding tube. The above described objects, features and advantages of the present invention will become more apparent from the following description. 2 is a schematic view showing a optomechanical housing, a light guide tube and a positioning mechanism according to a preferred embodiment of the present invention. Fig. 2 is an enlarged view showing a portion of the optomechanical housing, the light guide tube and the positioning mechanism of Fig. 1. The projector includes a light pipe 20, a light machine housing 10, and a positioning mechanism 30. The optomechanical housing 10 has a housing surface 11 and a bearing plate 12. The bearing plate 12 is protruded from the casing surface 11. 8

130: TW1600PA. And the bearing plate 12 has a through opening 12a. The positioning mechanism 30 is used to position and adjust the light guide tube 20. The positioning mechanism 30 includes a clamping member 31 and a light guide housing 32. The clamping member 31 is coupled to the optomechanical housing 10 and defines a receiving space with the bearing plate 12. As shown in Fig. 1, the light guide tube 20 is disposed in the accommodating space. The light pipe housing 32 is wrapped around the light guide tube 20 and has a positioning plate 32a. When the light guide tube 20 is placed in the accommodating space, the positioning plate 32a passes through the through opening 12a, and the assembler can move the positioning plate 32a to finely adjust the position of the light guide tube p20 along the central axis L20 of the light guide tube 20. . Please refer to FIG. 2 to FIG. 4 at the same time. FIG. 3 is a perspective view of the light guide tube and the light guide tube housing. Figure 4 shows a side view of the bearing plate, the light pipe and the positioning mechanism. The bearing plate 12 is composed of a first plate 13 and a second plate 14, and the absorbing member 31 is composed of a third plate 35 and a fourth plate 36. When the clamping member 31 is coupled to the optical housing 10, a hollow cylindrical receiving space is formed between the first plate 13, the second plate 14, the third plate 35 and the fourth plate 36. The light guide tube 20 is a four-sided cylinder. When the light guide tube 20 is placed in the accommodating space, the four sides of the light guide tube 20 respectively abut the first board 13 and the second board 14. The third plate 35 and the fourth plate 36. The light guide tube housing 32 covers the four sides of the light guide tube 20. When the light guide tube 20 is disposed in the accommodating space, the light guide tube housing 32 can prevent the light guide tube 20 from being damaged or overheated. As shown in Fig. 4, the positioning plate 32a is formed by bending the light guide tube case 32. The positioning plate 32a penetrates through the through opening 12a of the second plate 14. As shown in Fig. 2, the diameter of the through opening 12a along the central axis direction L20 is 9

Ϊ́3〇·2: TW1600PA. D12a is substantially larger than the length D32a of the positioning plate 32a along the central axis direction L20. The assembler can push and pull the positioning plate 32a to slide back along the central axis direction L20, and drive the light guide tube 20 to slide along the central axis direction L20. Thereby, the position of the light guide tube 20 in the central axis direction L20 is finely adjusted. Referring to FIG. 2, the positioning mechanism 30 further includes a first fine adjustment screw 33 and a second fine adjustment screw 34. The first fine adjustment screw 33 passes through the bearing plate 12 and abuts against the light guide tube 20, and the second fine adjustment screw 34 thread penetrates the bearing plate 12 and abuts against the light guide tube 20. The first fine adjustment screw 33 and the second fine adjustment screw 34 are movable in the direction of the light guide tube 20 or in the direction of the back light guide tube 20 for respectively adjusting the light guide tube 20 in a first direction L33 and a first The position of the L34 in the second direction. The first direction L33, the second direction L34, and the central axis direction L20 are perpendicular to each other. According to the above preferred embodiment, although the through opening 12a is illustrated as being disposed on the second plate 14, the through opening 12a of the present invention may be disposed on the first plate 13. As long as the positioning plate is used to penetrate the through opening of the bearing plate to finely adjust the position of the light guiding tube along the central axis, it does not deviate from the technical scope of the present invention. According to the above preferred embodiment, although the positioning plate is formed by taking a body forming structure of the bent light pipe housing as an example, the positioning mechanism of the present invention can also be protruded from the light guiding tube shell by a positioning pillar. The structure of the body. The use of a structural design to achieve fine-tuning of the position of the light pipe along the central axis does not depart from the technical scope of the present invention. The projector and the light pipe positioning mechanism thereof disclosed in the above embodiments of the present invention use a positioning plate to penetrate the bearing plate, and the assembler can move by 10 1309332

- Sanda number: TW1600PA. Positioning plate to fine-tune the position of the light pipe along the central axis. The projector can be prevented from shifting in the direction of the center axis during the assembly trimming process or during use. Not only can the accuracy of the light pipe assembly be increased, but also the quality of the projector image can be greatly improved. In view of the above, the present invention has been disclosed in a preferred embodiment, and is not intended to limit the present invention. Any changes and modifications may be made without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a housing, a light guide tube and a positioning mechanism in accordance with a preferred embodiment of the present invention. Fig. 2 is an enlarged view showing a portion of the optomechanical housing, the light guide tube and the positioning mechanism of Fig. 1. ❿ Fig. 3 is a perspective view of the light guide tube and the light guide tube housing. Figure 4 shows a side view of the bearing plate, the light pipe and the positioning mechanism. π

130 leak: TW1600PA [Main component symbol description]

10 : Optomechanical housing 11 : Housing surface 12 : Bearing plate 12a : Through opening 13 : First plate 14 : Second board 20 : Light guide tube 30 : Positioning mechanism 31 : Clamping element 32 : Light guide tube housing Body 33: First fine adjustment screw 34: Second fine adjustment screw 35: Third plate 36: Fourth plate 32a: Positioning plate D12a: Diameter D32a: Length L20: Center axis direction L33: First direction L34: Second direction 12

Claims (1)

• 1303⁄43⁄43⁄4 : TW1600PA . X. Patent Application Range: 1 · A positioning mechanism for positioning a light pipe on a light machine housing having a housing surface and a bearing a bearing plate is protruded from the surface of the housing, the bearing plate has a through opening, the positioning mechanism comprises: a clamping component coupled to the optical machine housing, and the bearing The light guide tube is disposed in the accommodating space; and a light guide tube shell is wrapped around the light guide tube and has a positioning plate; B. When the clamping member and the bearing plate are held between the clamping member and the bearing plate, the positioning plate passes through the through opening, and the assembler can move the positioning plate to finely adjust the light guiding tube along a central axis of the light guiding tube. position. 2. The positioning mechanism of claim 1, wherein the diameter of the through opening along the central axis is substantially greater than the length of the positioning plate along the central axis. 3. The positioning mechanism of claim 1, wherein the light guide tube housing is a metal housing. 4. The positioning mechanism of claim 1, wherein the positioning plate is formed by a partial bending of the light guide tube housing. 5. The positioning mechanism of claim 1, wherein the positioning plate is formed by the light guide tube housing at a ninety degree bend. 6. The positioning mechanism of claim 1, wherein the positioning mechanism further comprises: a first fine adjustment screw extending through the bearing plate and abutting the light guide tube, 13 130 view: TW1600PA is used to adjust the a light guide tube in a first direction, the first direction is perpendicular to the central axis direction; and a second fine adjustment screw extending through the bearing plate and abutting the light guide tube for adjusting the light guide The tube is in a second direction that is substantially perpendicular to the first direction and the central axis direction. 7. A projector, comprising: a light guide tube; a light machine housing having a housing surface, the light machine housing comprising: a bearing plate protruding from the surface of the housing, the bearing The plate has a through opening; and a positioning mechanism for positioning the light guide tube on the optical machine housing, the positioning mechanism includes: a clamping component coupled to the optical machine housing, and The bearing plate defines an accommodating space, the light guiding tube is disposed in the accommodating space; and a light guide tube shell is wrapped around the light guiding tube and has a positioning plate; When being sandwiched between the clamping member and the bearing plate, the positioning plate passes through the through opening, and the assembler can move the positioning plate to finely adjust the light guiding tube along a central axis direction of the light guiding tube s position. 8. The projector of claim 7, wherein the diameter of the through opening in the direction of the central axis is substantially greater than the length of the positioning plate in the direction of the central axis. 9. The projector of claim 7, wherein the guide TW1600PA light pipe housing is a metal housing. 10. The projector of claim 7, wherein the positioning plate is formed by a partial bending of the light guide tube housing. 11. The projector of claim 7, wherein the positioning plate is formed by the light guide tube housing at a ninety degree bend. 12. The projector of claim 7, wherein the positioning mechanism further comprises: a first fine adjustment screw extending through the bearing plate and abutting the light guide tube for adjusting the light guide tube a first direction position, the first direction is perpendicular to the central axis direction; and a second fine adjustment screw extending through the bearing plate and abutting the light guide tube for adjusting the light guide tube The position of the two directions is substantially perpendicular to the first direction. 15