Lens adjusting mechanism and projection device

Abstract

This utility model provides a lens adjustment mechanism and a projection device. The lens adjustment mechanism includes: a base, including an adjacent first surface and a second surface, wherein a guide extending along a first direction is provided on the second surface, and the first direction is parallel to the first surface; a movable member, having a sliding hole thereon, the sliding hole being slidably fitted onto the guide along the first direction, so that the movable member can move relative to the base along the guide; an actuating member, rotatably disposed on the second surface of the base and extending along the first direction; and the movable member having a contact portion that is motion-coupled with the outer surface of the actuating member; a supporting member, used to support the lens and fixedly connected to the movable member, wherein when the lens is mounted on the supporting member, the lens axis is perpendicular to the first surface; wherein, when the actuating member is rotated, through the coupling effect between the outer surface and the contact portion, the movable member causes linear movement relative to the base along the first direction, and the movable member drives the supporting member to move along the first direction, thereby adjusting the position of the lens relative to the base.

Description

Technical Field

[0001] This utility model relates to a lens adjustment mechanism, and more particularly to a lens adjustment mechanism suitable for projectors. Background Technology

[0002] With the development of display technology, DLP (Digital Light Processing) projection equipment has become the core solution for high-end optical projection because it adopts the digital reflective imaging principle and can provide high-definition, sharp, and stable image output.

[0003] In practical applications, due to differences in projection distance or installation location, it is often necessary to move and adjust the projected image to fit the screen area. Current technologies typically adjust the projection angle and position of the projection lens by adjusting the projector's stand or even moving the entire projection device, which is inconvenient. Furthermore, projectors currently on the market that support lens planar movement usually require additional mechanical components, including complex gears, linkages, or other electrically driven components. This can lead to larger tolerances accumulated during manufacturing and assembly, causing the projection lens angle or position to deviate from its normal state. It also increases the overall size and complexity of the projection device, resulting in higher manufacturing costs.

[0004] Therefore, it is necessary to design a lens adjustment mechanism and projection device to improve the above-mentioned defects. Utility Model Content

[0005] The purpose of this invention is to provide a lens adjustment mechanism and projection device with a simple structure and compact space; by simplifying the transmission mechanism, the lens position can be stably adjusted; by the motion coupling of the actuator and the moving part, the rotation of the actuator is converted into the movement of the lens, and the guide part provides guidance and constraint during the lens movement process, which is easy to operate and improves reliability.

[0006] To achieve the above objectives, this utility model provides a lens adjustment mechanism and a projection device. The lens adjustment mechanism includes:

[0007] The base includes an adjacent first surface and a second surface, on which a guide extending along a first direction is fixedly disposed, and the first direction is parallel to the first surface;

[0008] A movable component having a sliding hole, which is slidably fitted onto the guide component along the first direction, so that the movable component can move relative to the base along the guide component.

[0009] An actuator is rotatably disposed on the second surface of the base and extends along the first direction; and the movable member is provided with a contact portion that is motion-coupled with the outer surface of the actuator; and,

[0010] A support member is disposed on the first surface for supporting the lens, and the support member is fixedly connected to the movable member. When the lens is installed on the support member, the axis of the lens is perpendicular to the first surface.

[0011] When the actuator is rotated, the coupling between the outer surface and the contact portion causes the moving member to move linearly relative to the base along the first direction. As the moving member moves, the support member moves along the first direction to adjust the position of the lens relative to the base.

[0012] Preferably, the guide is inserted into the sliding hole, one end of the guide is fixedly mounted on the base, and the other end is provided with a stop.

[0013] The size of the stop portion is larger than the size of the sliding hole, so as to stop the moving part in the first direction.

[0014] Preferably, the lens adjustment mechanism further includes:

[0015] A positioning element, disposed on the second surface of the base, the positioning element comprising:

[0016] An axial through-hole is provided, with one end of the actuator passing through it. One end of the axial through-hole has a radial support surface for supporting the other end of the actuator.

[0017] A limiting member is disposed at the other end of the axial through hole to stop the actuator in the first direction; wherein the radial support surface cooperates with the limiting member to restrict the actuator from moving along the first direction.

[0018] Preferably, the actuator includes a screw extending along the first direction and its axial position constrained by the base; the contact portion is a threaded hole provided in the movable member, the threaded hole being helically engaged with the screw.

[0019] Preferably, it also includes operating components;

[0020] The operating element is connected to the screw and is used to drive the screw to rotate about its axis, thereby driving the moving element to move relative to the base along the first direction.

[0021] Preferably, the support member includes:

[0022] The adapter is fixedly connected to the moving part; and,

[0023] The support portion is fixedly connected to the adapter portion or is an integral part thereof, and the support portion is used to support the lens.

[0024] Preferably, one of the support portion and the base is provided with a limiting hole, and the other is provided with a protrusion; the limiting hole extends along the first direction, and the protrusion is inserted into the limiting hole;

[0025] The limiting hole, in conjunction with the protrusion, limits the range of movement of the lens along the first direction.

[0026] Preferably, it also includes a spring lock accessory;

[0027] The base has a first mounting hole extending along a second direction on its first surface, and the second direction intersects with the first direction. The support portion has a corresponding second mounting hole. The elastic lock accessory is sequentially inserted into the second mounting hole and the first mounting hole.

[0028] Preferably, the resilient lock accessory has a stepped shape structure in the second direction, including:

[0029] The first diameter section has an external threaded surface on its outer surface, and the first mounting hole has an internal threaded surface that is threadedly engaged with the external threaded surface; and,

[0030] The second diameter segment has its outer surface in contact with the inner surface of the second mounting hole, and the first diameter segment and the second diameter segment extend along the second direction.

[0031] A projection device, comprising:

[0032] The camera housing has a lens opening;

[0033] The lens adjustment mechanism, wherein the base is fixedly disposed within the housing; and,

[0034] The lens is fixed to the support of the lens adjustment mechanism and protrudes from the lens opening.

[0035] Compared with the prior art, the lens adjustment mechanism provided by this utility model has a guide and an actuator that both extend along a first direction. The moving part is slidably sleeved on the guide through a sliding hole, and the support is fixedly connected to the moving part. The guide provides effective guidance and constraint, enhances the stability of lens movement, and prevents the lens from tilting. The overall structure is simple and compact, which is conducive to miniaturization and cost control. In addition, the outer surface of the actuator is directly coupled to the contact part on the moving part, eliminating the need for additional transmission components. This allows the rotation of the actuator to be converted into lens movement, simplifying operation and improving stability. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of a lens adjustment mechanism according to an embodiment of the present invention;

[0037] Figure 2 for Figure 1A cross-sectional view of the center lens adjustment mechanism along the AA direction;

[0038] Figure 3 This is an exploded view of the lens adjustment mechanism according to an embodiment of the present invention. Detailed Implementation

[0039] To provide a better understanding of the purpose, structure, features and functions of this utility model, detailed descriptions are provided below with reference to the embodiments.

[0040] Certain terms are used in the specification and claims to refer to specific elements. It will be understood by those skilled in the art that manufacturers may use different names to refer to the same element. This specification and claims do not distinguish elements by differences in name, but rather by differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to".

[0041] See Figures 1-3 , Figure 1 This is a schematic diagram of the overall structure of the lens adjustment mechanism proposed in this utility model. Figure 2 for Figure 1 A cross-sectional view of the center lens adjustment mechanism along the AA direction. Figure 3 This is an exploded view of the lens adjustment mechanism according to an embodiment of the present invention.

[0042] The lens adjustment mechanism proposed in this utility model can be used in optical imaging or optical inspection equipment, etc. Taking a projector device as an example, this utility model can adjust the position of its lens 6.

[0043] See Figures 1-2 The aforementioned lens adjustment mechanism includes a base 1, a moving part 3, an actuating part 4, and a supporting part 5. The base 1 includes an adjacent first surface M1 and a second surface M2, wherein a guide part 2 extending along a first direction D1 is fixedly disposed on the second surface M2, and the first direction D1 is parallel to the first surface M1. Preferably, as... Figure 1As shown, the adjacent first surface M1 and second surface M2 of the base 1 are perpendicular to each other. The movable member 3 has a sliding hole 31, which slides along the first direction D1 onto the guide member 2, allowing the movable member 3 to move relative to the base 1 along the guide member 2. The guide member 2 provides rigid guidance, enhancing the stability of the movable member 3 during movement. The actuator 4 is rotatably mounted on the second surface M2 of the base 1 and extends along the first direction D1. The movable member 3 has a contact portion S1 that is motion-coupled with the outer surface of the actuator 4. The support member 5 is disposed on the first surface M1 to support the lens 6 and is fixedly connected to the movable member 3. When the lens 6 is mounted on the support member 5, the axial direction L1 of the lens 6 is perpendicular to the first surface M1 to prevent the optical axis of the lens 6 from tilting.

[0044] In this design, the user only needs to rotate the actuator 4, and the outer surface of the actuator 4 directly couples with the contact portion S1 on the moving part 3. This converts the rotational motion into linear movement of the moving part 3 relative to the base 1 along the first direction D1, without the need for additional complex gears, connecting rods, or other transmission components. For example, the actuator 4 can be a screw, and the contact portion S1 can be a threaded hole to achieve direct force transmission, but this invention is not limited to these limitations. As the moving part 3 moves linearly along the first direction D1, it can drive the support member 5 to move along the first direction D1, thereby adjusting the position of the lens 6 relative to the base 1 to adapt to the projection screen, reduce image offset, simplify operation, and effectively improve the user experience.

[0045] Furthermore, the guide member 2 and the actuator 4 proposed in this utility model are both disposed on the second surface M2 and extend along the first direction D1. The moving member 3 is directly slidably sleeved on the guide member 2 through the sliding hole 31, and the support member 5 is fixed on the moving member 3. This layout makes the space compact, simplifies the structure, and is conducive to miniaturization and cost control.

[0046] The aforementioned guide member 2 is inserted into the sliding hole 31 of the movable member 3. One end of the guide member 2 is fixedly mounted on the base 1, and the other end is provided with a stop part 21 (e.g., Figure 3 As shown, the size of the stop part 21 is larger than the size of the sliding hole 31. In this way, the guide 2 provides guidance to prevent the lens 6 from tilting or shifting during adjustment, while effectively preventing the moving part 3 from sliding out of the guide 2, thus improving reliability.

[0047] Refer to Figures 2-3As shown, in one embodiment, the lens adjustment mechanism further includes a positioning member 11 and a limiting member 12. The positioning member 11 is fixedly mounted on the second surface M2 of the base 1, and includes an axial through hole 11a. One end of the actuator 4 passes through the axial through hole 11a, and a radial support surface S2 is provided at one end of the axial through hole 11a to support the other end of the actuator 4. The limiting member 12 is located at the other end of the axial through hole 11a and stops the actuator 4 in the first direction D1. The radial support surface S2 cooperates with the limiting member 12 to jointly constrain the axial degree of freedom of the actuator 4, eliminating axial (along the first direction D1) movement of the actuator 4, ensuring linear transmission of rotational displacement, and converting the rotation of the actuator 4 into movement of the lens 6 relative to the base 1.

[0048] In one embodiment, the lens adjustment mechanism further includes an operating element 8 connected to an actuator 4 (such as a screw). The user rotates the operating element 8 to drive the screw to rotate, causing the moving element 3 and the support element 5 fixedly connected to the moving element 3 to move relative to the base 1 along a first direction D1, ultimately achieving precise adjustment of the lens 6 position relative to the base 1. The operating element 8 may be, for example, a knob or a gear; this invention is not limited to these.

[0049] In one embodiment, the screw 4 extends along the first direction D1 and is engaged with the limiting member 12 by the radial support surface S2. The axial position of the screw 4 is constrained on the second surface M2 of the base 1. The contact part S1 is a threaded hole provided in the moving member 3. The threaded hole is helically engaged with the screw 4 to realize the direct conversion from rotational motion to linear motion, but the present invention is not limited thereto.

[0050] In one embodiment, one of the support member 5 and the base 1 is provided with a limiting hole 51, and the other is provided with a protrusion 13, which is inserted into the limiting hole 51. Figure 3 As shown, the support member 5 includes, for example, a connecting part 5a and a supporting part 5b. The connecting part 5a and the supporting part 5b are fixedly connected, or are an integral unit (one-piece molding). The connecting part 5a is fixedly connected to the moving part 3. The supporting part 5b is used to support the lens 6, and the supporting part 5b is provided with the limiting hole 51. The limiting hole 51 is, for example, an elliptical limiting hole 51 extending along the first direction D1. A protruding post 13 is provided on the first surface M1 of the base 1. When the support member 5 moves along the first direction D1, the protruding post 13 is used to stop the limiting hole 51 to further limit the movement range of the support member 5 and the lens 6 relative to the base 1 in the first direction D1, so that the adjustment of the support member 5 and the lens 6 is more stable and reliable. The specific size and shape of the limiting hole 51 and the protruding post 13 can be designed as needed, and this utility model embodiment is not limited thereto.

[0051] Furthermore, at least one first mounting hole 14 is provided on the first surface M1 of the base 1, extending along the second direction D2. At least one second mounting hole 52 is correspondingly provided on the support portion 5b of the support member 5. The second mounting holes 52 and the corresponding first mounting holes 14 are sequentially secured by an elastic locking attachment 7. The second direction D2 intersects the first direction D1 and is preferably perpendicular to it. In other words, the second direction D2 is preferably parallel to the axial direction L1 of the lens 6, so that the axial direction L1 of the lens 6 mounted on the support portion 5b is always perpendicular to the first surface M1, preventing optical axis tilting. The elastic locking attachment 7 is preferably a rubber stepped screw with a stepped shape structure in the second direction D2, including a coaxial first diameter segment and a second diameter segment. The first diameter segment and the second diameter segment extend along the second direction. The outer surface of the first diameter segment has an external thread surface, and the first mounting hole 14 has an internal thread surface that engages with the external thread surface. The second diameter segment contacts the inner surface of the second mounting hole 52.

[0052] During the adjustment of the lens 6 position, when the user operates the aforementioned operating component 8 to rotate the screw 4 (actuator 4), the moving component 3, due to the helical engagement between its threaded hole and the screw 4, will move linearly along the first direction D1. At this time, the support component 5, fixedly connected to the moving component 3, along with the lens 6 it carries, will also move along the first direction D1. During this movement, a lateral force is applied to the second diameter section of the elastic locking accessory 7 through the side wall of the second mounting hole 52, causing the elastic locking accessory 7 to elastically deform to adapt to the displacement of the second mounting hole 52 and the support component 5.

[0053] As can be seen, the introduction of the elastic locking accessory 7 allows the support member 5 and the lens 6 to move along the first direction D1, while the elastic locking accessory 7 also enhances the stability between the support member 5 and the base 1 through the constraint of the second direction D2, effectively preventing the lens 6 from tilting and shifting during movement and in a stationary state, and ensuring the stability of the lens 6 during and after adjustment.

[0054] In one embodiment, when the lens adjustment mechanism is used in a projection device, the base 1 is fixedly disposed inside the housing of the projection device. The housing of the projection device has a lens opening corresponding to the position of the projection lens 6. The lens 6 is fixedly mounted on the support member 5 and protrudes from the lens opening for image projection. The user can drive the actuator 4 to rotate by operating (e.g., rotating) the operating member 8 connected to the actuator 4, thereby causing the moving member 3, the support member 5 fixedly connected to the moving member 3, and the lens 6 to move smoothly and linearly along the first direction D1. Preferably, the operating member 8 protrudes from the housing for easy access and operation by the user. This allows adjustment of the position of the lens 6 relative to the housing itself in a specific direction, thereby adjusting the position of the projected image without moving the entire projection device or adjusting its base stand.

[0055] In summary, the lens adjustment mechanism provided by this utility model provides rigid guidance and limiting through a guide member 2 extending along the first direction D1, and an actuator 4 (such as a screw) rotatably mounted on the base 1 and extending in the same direction. The actuator 4 and the contact portion S1 (such as a threaded hole) on the moving member 3 are directly coupled. By rotating only the actuator 4, the rotational motion can be directly converted into the linear displacement of the moving member 3 and the lens 6. This design is simple and compact, with a short transmission path, which is conducive to the miniaturization of the equipment and is easy and reliable to operate.

[0056] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A lens adjustment mechanism, characterized in that, include: The base includes an adjacent first surface and a second surface, on which a guide extending along a first direction is fixedly disposed, and the first direction is parallel to the first surface; A movable component having a sliding hole, which is slidably fitted onto the guide component along the first direction, so that the movable component can move relative to the base along the guide component. An actuator is rotatably disposed on the second surface of the base and extends along the first direction; and the movable member is provided with a contact portion that is motion-coupled with the outer surface of the actuator; and, A support member is disposed on the first surface for supporting the lens, and the support member is fixedly connected to the movable member. When the lens is installed on the support member, the axis of the lens is perpendicular to the first surface. When the actuator is rotated, the coupling between the outer surface and the contact portion causes the moving member to move linearly relative to the base along the first direction. As the moving member moves, the support member moves along the first direction to adjust the position of the lens relative to the base.

2. The lens adjustment mechanism as described in claim 1, characterized in that, The guide is inserted into the sliding hole, one end of the guide is fixedly mounted on the base, and the other end is provided with a stop. The size of the stop portion is larger than the size of the sliding hole, so as to stop the moving part in the first direction.

3. The lens adjustment mechanism as described in claim 1, characterized in that, Also includes: A positioning element, disposed on the second surface of the base, the positioning element comprising: An axial through-hole is provided, with one end of the actuator passing through it. One end of the axial through-hole has a radial support surface for supporting the other end of the actuator. A limiting member is disposed at the other end of the axial through hole to stop the actuator in the first direction; wherein the radial support surface cooperates with the limiting member to restrict the actuator from moving along the first direction.

4. The lens adjustment mechanism as described in claim 1, characterized in that, The actuator includes a screw that extends along the first direction and whose axial position is constrained by the base; the contact portion is a threaded hole provided in the movable member, the threaded hole being helically engaged with the screw.

5. The lens adjustment mechanism as described in claim 4, characterized in that, It also includes operating components; The operating element is connected to the screw and is used to drive the screw to rotate about its axis, thereby driving the moving element to move relative to the base along the first direction.

6. The lens adjustment mechanism as described in claim 1, characterized in that, The support component includes: The adapter is fixedly connected to the moving part; and, The support portion is fixedly connected to the adapter portion or is an integral part thereof, and the support portion is used to support the lens.

7. The lens adjustment mechanism as described in claim 6, characterized in that, One of the support and the base is provided with a limiting hole, and the other is provided with a protrusion; the limiting hole extends along the first direction, and the protrusion is inserted into the limiting hole; The limiting hole, in conjunction with the protrusion, limits the range of movement of the lens along the first direction.

8. The lens adjustment mechanism as described in claim 6, characterized in that, It also includes elastic lock accessories; The base has a first mounting hole extending along a second direction on its first surface, and the second direction intersects with the first direction. The support portion has a corresponding second mounting hole. The elastic lock accessory is sequentially inserted into the second mounting hole and the first mounting hole.

9. The lens adjustment mechanism as described in claim 8, characterized in that, The resilient lock accessory has a stepped shape structure in the second direction, including: The first diameter section has an external threaded surface on its outer surface, and the first mounting hole has an internal threaded surface that is threadedly engaged with the external threaded surface; and, The second diameter segment has its outer surface in contact with the inner surface of the second mounting hole, and the first diameter segment and the second diameter segment extend along the second direction.

10. A projection device, characterized in that, include: The camera housing has a lens opening; The lens adjustment mechanism as described in any one of claims 1-9, wherein the base is fixedly disposed within the housing; as well as, The lens is fixed to the support of the lens adjustment mechanism and protrudes from the lens opening.

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