A mechanical structure for adjusting the light outlet center point of a light guide tube of a projector

Abstract

The utility model discloses a kind of mechanical structures for adjusting the light guide pipe light center point of projector light machine, including the light guide pipe assembled in light machine interior, light guide pipe outer wall is covered with light guide pipe iron clothes;Light guide pipe and light guide pipe iron clothes constitute light guide pipe module;It further includes first outer adjusting mechanism and second outer adjusting mechanism;First outer adjusting mechanism includes first screw and first spring being arranged in the left and right two side walls of light guide pipe module, and first screw and first spring are oppositely arranged;Second outer adjusting mechanism includes second pressure mechanism being arranged in the top surface of light guide pipe module and second spring being arranged in the bottom surface of light guide pipe module, and second pressure mechanism and second spring are oppositely arranged.The utility model provides a kind of outer operable adjusting mechanism for adjusting the light center point of projector light machine light guide pipe, and the accurate adjustment of light guide pipe light center point position is realized by simple mechanical transmission, compensates production and assembly tolerance, simultaneously, solve the concentricity problem of light guide pipe and DMD chip, eliminate picture color band, ensure that projection parameter consistency.

Description

Technical Field

[0001] This utility model belongs to the field of projector optical engine light guides, and in particular, it is a mechanical structure for adjusting the light output center point of the projector optical engine light guide. Background Technology

[0002] In the design and manufacturing of existing projector optical engines, the installation accuracy of optical components (such as lenses, mirrors, and DMD chips) directly affects projection quality (such as brightness, contrast, and focus sharpness). However, due to the accumulation of machining tolerances and assembly errors in structural components, optical components may deviate from their theoretically designed positions, resulting in inconsistent projection parameters for each device. The position of the light-emitting center point of the light guide tube inside the optical engine has a significant impact on image color fringing and brightness.

[0003] Traditional solutions typically rely on two methods to adjust the position of the light-emitting center point of the optical guide tube: 1. Improving the machining accuracy of parts: significantly increasing manufacturing costs; 2. Internal manual adjustment: requiring disassembly of the outer casing and adjustment of internal screws using specialized tools, which is complex and inefficient. Therefore, there is an urgent need for an adjustment device that can quickly compensate for tolerances through external operation without disassembly. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing an externally operable adjustment mechanism for adjusting the light output center point of the light guide tube of a projector. Through simple mechanical transmission, the precise adjustment of the light output center point position of the light guide tube is achieved, compensating for production and assembly tolerances. At the same time, it solves the concentricity problem between the light guide tube and the DMD chip, eliminates color banding in the image, and ensures the consistency of projection parameters.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A mechanical structure for adjusting the light output center point of the light guide tube of a projector optical engine includes a light guide tube assembled inside the optical engine, and the outer peripheral wall of the light guide tube is covered with a light guide tube sheath; the light guide tube and the light guide tube sheath constitute a light guide tube module.

[0007] It also includes a first external adjustment mechanism and a second external adjustment mechanism; the first external adjustment mechanism includes a first screw and a first spring disposed on the left and right side walls of the light guide module, the first screw and the first spring being disposed opposite to each other; the second external adjustment mechanism includes a second pressing mechanism disposed on the top surface of the light guide module and a second spring disposed on the bottom surface of the light guide module, the second pressing mechanism and the second spring being disposed opposite to each other.

[0008] Furthermore, the first screw is installed through one outer wall of the optical engine body, and its end near the optical guide module is tightly fitted to the side wall of the optical guide module; the first spring is located in the space between the other side wall of the optical guide module and the side wall of the optical engine body, and is in a compressed state.

[0009] Furthermore, the second pressing mechanism includes a top adjusting bracket, a wedge engagement mechanism, a second screw, and a second spring; the top adjusting bracket includes a semi-enclosed space formed by the front, back, top surface, and one side surface, and the bottom of the adjusting bracket is engaged with the top surface of the light guide module; the top adjusting bracket forms an open installation space through the semi-enclosed space it forms and the top surface of the light guide module, and the wedge engagement mechanism is assembled in the open installation space.

[0010] Furthermore, the top surface and one side of the top adjustment bracket are formed with ear plates, which are fastened to the inside of the optical engine body.

[0011] Furthermore, the wedge engagement mechanism is formed by two triangular wedges sliding together on an inclined plane. The lower triangular wedge is fixed to the top surface of the optical guide module, and the top surface of the upper triangular wedge is pressed against the inner wall of the top adjustment bracket. The second screw is installed through an outer wall of the optical engine body, and its end near the optical guide module is pressed against the side wall of the upper triangular wedge. The second spring is located in the space between the bottom surface of the optical guide module and the inner bottom wall of the optical engine body, and is in a compressed state.

[0012] Furthermore, the first and second external adjustment mechanisms are located at the front of the optical guide module.

[0013] Furthermore, the optical guide module has no degree of freedom in the Z direction.

[0014] Furthermore, in the optical guide module, a claw is provided at the rear bottom of the optical guide metal casing, which is tightly embedded in the slot space opened inside the optical engine body.

[0015] Furthermore, the rear end of the optical guide module is equipped with an internal optical engine block.

[0016] Furthermore, multiple metal sheathing plates are provided at the rear position of the optical guide sheath, and the metal sheathing plates are pressed against the outer peripheral wall of the optical guide.

[0017] This utility model has the following beneficial effects:

[0018] This invention provides an externally operable adjustment mechanism for adjusting the light output center point of the light guide tube in a projector. Through simple mechanical transmission, it achieves precise adjustment of the light output center point position, compensating for production and assembly tolerances. Simultaneously, it solves the concentricity problem between the light guide tube and the DMD chip, eliminating color banding in the image and ensuring consistent projection parameters. This adjustment mechanism features a simple structure, high adjustment accuracy, and good stability, effectively solving the problem of difficult light output center point adjustment in existing technologies, and has broad application prospects.

[0019] 2) When fine-tuning of the light-emitting center point of the light guide in the Y direction is required, the upper triangular wedge can be pushed to slide up / down along the inclined plane by rotating the second screw, thereby achieving fine-tuning of the light guide module in the Y direction and thus fine-tuning of the light-emitting center point in the Y direction. Since the second screw is located outside the optical engine, the light guide's light-emitting center point in the Y direction can be quickly adjusted and tolerances compensated without disassembling the machine and by operating the second screw externally.

[0020] 3) The first screw is located on the outside of the optical engine body, installed along the X direction, and is positioned opposite to the first spring to complete the fine adjustment of the light output center point of the light guide in the X direction.

[0021] 4) In the optical guide module, a claw is located at the rear bottom of the optical guide armor, which is tightly embedded in a slot space inside the optical engine body to restrict the forward freedom of the optical guide module; an internal optical engine block is located at the rear end of the optical guide module to restrict the backward freedom of the optical guide module. Due to the restrictions of the internal optical engine block and the claw of the optical guide armor, the optical guide module is completely fixed in the Z direction. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the first external adjustment mechanism and the second external adjustment mechanism of this utility model.

[0023] Figure 2 This is an exploded disassembly diagram of the first and second external adjustment mechanisms of this utility model.

[0024] Figure 3 This is an assembly drawing of the mechanical structure of this utility model being installed in the optical engine body.

[0025] Figure 4 This is a cross-sectional view of the mechanical structure of this utility model in the XY direction.

[0026] Figure 5 This is a cross-sectional view of the mechanical structure of this utility model in the Z direction;

[0027] Figure 6 This is a schematic diagram of the Z-direction fixing structure of the mechanical structure of this utility model.

[0028] The components include: 1. Top adjustment bracket; 2. Upper triangular wedge; 3. Lower triangular wedge; 4. Optical guide module; 5. First spring; 6. Second spring; 7. First screw; 8. Second screw; 9. Second pressing mechanism; 10. Optical engine body; 11. Claw; 12. Optical engine internal stop; 13. Iron sheath pressing plate; 14. Slot space. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0030] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0031] like Figure 1-2 As shown, a mechanical structure for adjusting the light output center point of the light guide tube of a projector optical engine includes a light guide tube assembled inside the optical engine, and the outer peripheral wall of the light guide tube is covered with a light guide tube sheath; the light guide tube and the light guide tube sheath together form a light guide tube module 4.

[0032] Furthermore, multiple metal clamping plates 13 are provided at the rear position of the optical guide metal clamping plate. The metal clamping plates are pressed against the outer peripheral wall of the optical guide to improve the stability of the optical guide module assembly.

[0033] It also includes the first external investigation agency and the second external investigation agency.

[0034] The first external adjustment mechanism is mounted on the left and right side walls of the light guide module and is used to make fine adjustments to the light output center point of the light guide in the X direction (left and right direction).

[0035] The second external adjustment mechanism is assembled on the top and bottom surfaces of the light guide module and is used to make fine adjustments to the light output center point of the light guide in the Y direction (vertical direction).

[0036] Furthermore, such as Figure 4 As shown, the first external adjustment mechanism includes a first screw 7 and a first spring 5 disposed on the left and right side walls of the light guide module. The first screw 7 and the first spring 5 are arranged opposite to each other and cooperate to complete the fine adjustment of the light output center point of the light guide in the X direction.

[0037] Preferably, the first screw is installed through one outer wall of the optical engine body, with its end near the light guide module being tightly fitted against the side wall of the light guide module; the first spring is located in the space between the other side wall of the light guide module and the side wall of the optical engine body, and is in a compressed state. The first screw is located outside the optical engine body, installed along the X direction, and is positioned opposite to the first spring, cooperating to complete the fine adjustment of the light output center point of the light guide in the X direction.

[0038] Since the first screw is located outside the optical engine, the light-emitting center point of the light guide can be quickly adjusted in the X direction without disassembling the machine, thus compensating for tolerances.

[0039] Furthermore, such as Figure 4As shown, the second external adjustment mechanism includes a second pressing mechanism 9 disposed on the top surface of the light guide module and a second spring 6 disposed on the bottom surface of the light guide module. The second pressing mechanism and the second spring 6 are arranged opposite to each other and cooperate to complete the fine adjustment of the light output center point of the light guide in the Y direction.

[0040] Preferably, the second pressing mechanism includes a top adjusting bracket 1, a wedge-shaped engagement mechanism, a second screw 8, and a second spring 6; the top adjusting bracket includes a semi-enclosed space formed by the front, back, top, and one side surfaces, and the bottom of the adjusting bracket is engaged with the top surface of the light guide module, thereby forming the bottom surface of the semi-enclosed space with the top surface of the light guide module. Figure 1-2 As shown, the top adjustment bracket forms an open installation space through its own semi-enclosed space and the top surface of the light guide module. The wedge block engagement mechanism is installed in the open installation space through this opening.

[0041] The top surface and one side of the top adjustment bracket have ear plates, which are fastened to the inside of the optical machine body.

[0042] The wedge engagement mechanism is formed by two triangular wedges sliding together on an inclined plane. One triangular wedge is stationary and the other is moving. The lower triangular wedge 3 is fixed to the top surface of the light guide module, and the top surface of the upper triangular wedge 2 is pressed against the inner wall of the top surface of the top adjustment bracket.

[0043] Preferably, the second screw 8 is installed through an outer wall of the optical engine body, with its end near the light guide module abutting against the side wall of the wedge-shaped engagement mechanism; for example... Figure 1-2 As shown, the second screw is fitted tightly against the side wall of the upper triangular wedge near one end of the light guide module.

[0044] Furthermore, the second spring is located in the space between the bottom surface of the optical guide module and the inner bottom wall of the optical engine body, and is in a compressed state.

[0045] Furthermore, the second screw is located on the outside of the optical engine body, installed along the X direction, and works together with the wedge block engagement mechanism and the second spring to complete the fine adjustment of the light output center point of the light guide in the Y direction.

[0046] Specifically, within the open installation space, along the X direction, the second screw tightens against the side wall of the upper triangular wedge. Along the Y direction, due to the spring compression force on the bottom surface of the light guide module, the top surface of the upper triangular wedge is pressed against the inner wall of the top surface of the top adjustment bracket. At this time, due to the combined action of the tightening force of the second screw, the spring compression force, the inclined friction force of the wedge engagement mechanism, and the downward compression force of the top adjustment bracket, the wedge engagement mechanism remains stationary. When it is necessary to fine-tune the light output center point of the light guide in the Y direction, the upper triangular wedge can be pushed to slide up / down along the inclined surface by rotating the second screw, thereby achieving fine-tuning of the light guide module in the Y direction and thus fine-tuning of the light output center point in the Y direction.

[0047] Since the second screw is located outside the optical engine, the light output center point of the light guide tube can be quickly adjusted in the Y direction without disassembling the machine, thus compensating for tolerances.

[0048] Preferably, the first external adjustment mechanism and the second external adjustment mechanism are located at the front of the optical guide module.

[0049] Furthermore, the optical guide module has no degree of freedom in the Z direction.

[0050] In the optical guide module, a claw 11 is provided at the rear of the bottom of the optical guide iron cover. It is tightly embedded in the slot space 14 opened inside the optical engine body to restrict the forward freedom of the optical guide module.

[0051] Furthermore, the optical guide module has an internal optical engine block 12 at its rear end to restrict the optical guide module's backward degree of freedom.

[0052] like Figure 6 As shown, due to the limitations of the internal blocks of the optical engine and the metal clamps of the optical guide, the optical guide module is completely fixed in the Z direction.

[0053] The following is a description of the embodiments and appendices. Figure 1-6 Further details regarding this application:

[0054] The optical guide module has no degree of freedom in the Z direction, such as... Figure 4 As shown, the light guide module can be finely adjusted in the XY plane. When it is necessary to adjust the light output center point of the light guide in the X direction, the first screw installed on the outer wall of the optical engine body is rotated inward or outward, and the adjustment range in the X direction is -1.5mm to 1.1mm. When it is necessary to adjust the light output center point of the light guide in the Y direction, the second screw installed on the outer wall of the optical engine body is rotated inward or outward, and the adjustment range in the Y direction is -1.2mm to 2.1mm.

[0055] After adjustment, apply adhesive to the connection between the screw and the machine body to prevent the screw from loosening due to vibration during transportation and to ensure its stability.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A mechanical structure for adjusting the light-emitting center point of the optical engine light guide tube of a projector, characterized in that: Includes an optical guide tube assembled inside the optical engine, with the outer peripheral wall of the optical guide tube covered with an optical guide tube sheath; the optical guide tube and the optical guide tube sheath together form an optical guide tube module; It also includes a first external adjustment mechanism and a second external adjustment mechanism; the first external adjustment mechanism includes a first screw and a first spring disposed on the left and right side walls of the light guide module, the first screw and the first spring being disposed opposite to each other; the second external adjustment mechanism includes a second pressing mechanism disposed on the top surface of the light guide module and a second spring disposed on the bottom surface of the light guide module, the second pressing mechanism and the second spring being disposed opposite to each other.

2. The mechanical structure for adjusting the light output center point of the projector's optical engine light guide tube according to claim 1, characterized in that: The first screw is installed through one outer wall of the optical engine body, and its end near the optical guide module is tightly fitted to the side wall of the optical guide module; the first spring is located in the space between the other side wall of the optical guide module and the side wall of the optical engine body, and is in a compressed state.

3. The mechanical structure for adjusting the light output center point of the projector's optical engine light guide tube according to claim 1, characterized in that: The second pressing mechanism includes a top adjustment bracket, a wedge engagement mechanism, a second screw, and a second spring. The top adjustment bracket includes a semi-enclosed space formed by the front, back, top, and one side. The bottom of the adjustment bracket is engaged with the top surface of the light guide module. The top adjustment bracket forms an open installation space through its own semi-enclosed space and the top surface of the light guide module. The wedge engagement mechanism is assembled within this open installation space.

4. The mechanical structure for adjusting the light output center point of the projector's optical engine light guide tube according to claim 3, characterized in that: The top surface and one side of the top adjustment bracket have ear plates, which are fastened to the inside of the optical machine body.

5. The mechanical structure for adjusting the light-emitting center point of the projector's optical engine light guide tube according to claim 3, characterized in that: The wedge engagement mechanism is formed by two triangular wedges sliding together on an inclined plane. The lower triangular wedge is fixed to the top surface of the optical guide module, and the top surface of the upper triangular wedge is pressed against the inner wall of the top adjustment bracket. The second screw is installed through an outer wall of the optical engine body, and its end near the optical guide module is pressed against the side wall of the upper triangular wedge. The second spring is located in the space between the bottom surface of the optical guide module and the inner bottom wall of the optical engine body, and is in a compressed state.

6. The mechanical structure for adjusting the light-emitting center point of the optical engine light guide of a projector according to claim 1, characterized in that: The first and second external adjustment mechanisms are located at the front of the optical guide module.

7. The mechanical structure for adjusting the light-emitting center point of the projector's optical engine light guide tube according to claim 1, characterized in that: The optical guide module has no degree of freedom in the Z direction.

8. The mechanical structure for adjusting the light-emitting center point of the optical engine light guide of a projector according to claim 7, characterized in that: In the optical guide module, a claw is located at the rear bottom of the optical guide metal casing, which is tightly embedded in the slot space opened inside the optical engine body.

9. The mechanical structure for adjusting the light output center point of the optical engine light guide of a projector according to claim 8, characterized in that: The optical guide module has an internal optical engine block at its rear end.

10. The mechanical structure for adjusting the light output center point of the optical engine light guide tube of a projector according to claim 1, characterized in that: Multiple metal clips are located at the rear of the optical guide tube's metal jacket, and these metal clips are pressed against the outer peripheral wall of the optical guide tube.

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