Lens structure and projection display device

Abstract

The utility model belongs to the projection display technical field especially relates to a lens structure and projection display device. Lens structure includes: outer tube, inner tube and rotating part, outer tube has the accommodation cavity, inner tube is at least partial sliding setting in the accommodation cavity, the rolling surface of rotating part is the rotary surface, and rotating part is located in the accommodation cavity, rotating part rotationally connects outer tube and the rolling surface of rotating part abuts the outside surface of inner tube, or rotating part rotationally connects inner tube and the rolling surface of rotating part abuts the cavity wall of accommodation cavity, when the inner tube relative sliding with the outer tube, drive rotating part rotates. The utility model can reduce the friction when the inner tube relative sliding with the outer tube, can improve the smoothness and convenience of assembly or disassembly between the inner tube and the outer tube.

Description

Technical Field

[0001] This utility model belongs to the field of projection display technology, and in particular relates to a lens structure and a projection display device. Background Technology

[0002] A projector is an optoelectronic device that converts images or video signals into optical images and projects them onto a screen or wall. It is widely used in various places such as home theaters, office meetings, education and teaching, and commercial exhibitions, and has become an indispensable tool in daily life and work.

[0003] Most projectors on the market use a structure where the inner cylinder slides and extends relative to the outer cylinder to achieve focusing. By inserting the inner cylinder into the outer cylinder, and ensuring that the outer diameter of the inner cylinder matches the inner diameter of the outer cylinder, the inner cylinder is less prone to shaking after assembly, which is beneficial for projection and focusing.

[0004] However, during the assembly of the inner and outer cylinders, or during the disassembly of the outer and inner cylinders, the inner and outer cylinders are in surface-to-surface contact, resulting in significant friction during sliding. This makes the assembly and disassembly of the inner and outer cylinders difficult and inconvenient to use. Utility Model Content

[0005] The purpose of this application is to provide a lens structure that addresses the problem of how to improve the ease of use of a lens structure.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] In a first aspect, a lens structure is provided, comprising: an outer cylinder, an inner cylinder, and a rotating member. The outer cylinder has a receiving cavity, and the inner cylinder is at least partially slidably disposed in the receiving cavity. The rolling surface of the rotating member is a rotational surface, and the rotating member is located in the receiving cavity. The rotating member is rotatably connected to the outer cylinder, and the rolling surface of the rotating member abuts against the outer surface of the inner cylinder, or the rotating member is rotatably connected to the inner cylinder, and the rolling surface of the rotating member abuts against the cavity wall of the receiving cavity. When the inner cylinder slides relative to the outer cylinder, it drives the rotating member to rotate.

[0008] In some embodiments, the rotating member is rotatably connected to the inner cylinder, and a first receiving groove is provided on the outer surface of the inner cylinder. The first receiving groove extends along the axial direction of the inner cylinder or the outer cylinder. The two ends of the rotating member are respectively rotatably connected to the groove walls on opposite sides of the first receiving groove, and the rotating member is partially exposed from the first receiving groove and abuts against the outer cylinder.

[0009] In some embodiments, the rotating member is rotatably connected to the outer cylinder, and the cavity wall of the accommodating cavity is provided with a second accommodating groove. The second accommodating groove extends axially along the inner cylinder or the outer cylinder. The two ends of the rotating member are respectively rotatably connected to the groove walls on opposite sides of the second accommodating groove, and the rotating member is partially exposed from the second accommodating groove and abuts against the inner cylinder.

[0010] In some embodiments, a guide groove is provided on the outer surface of the inner cylinder, and the rotating member abuts against the bottom of the guide groove. The guide groove is used to guide the inner cylinder to move relative to the rotating member.

[0011] In some embodiments, multiple rotating members are arranged at intervals along the second receiving groove.

[0012] In some embodiments, multiple second receiving grooves are arranged circumferentially around the outer cylinder, and each second receiving groove is provided with the rotating member.

[0013] In some embodiments, the rotating component includes a rotating shaft and a rolling wheel connected to the rotating shaft, the rotating shaft being rotatably connected to the outer cylinder and the rolling wheel abutting against the inner cylinder.

[0014] In some embodiments, the rollers are rollers made of an elastic material, and each of the rollers is in an elastic deformation state.

[0015] In some embodiments, the lens structure further includes a drive assembly comprising a rack located in the inner cylinder, a gear rotatably connected to the outer cylinder and meshing with the rack, and a drive rod rotatably connected to the outer cylinder and used to drive the gear.

[0016] In a second aspect, a projection display device is provided, which includes the lens structure.

[0017] The beneficial effects of this application are as follows: by making the rolling surface of the rotating component a rotary surface, the rotating component is rotatably connected to the outer cylinder or the inner cylinder, and its rolling surface abuts against the outer surface of the inner cylinder or the cavity wall, the frictional force when the inner cylinder and the outer cylinder slide relative to each other can be reduced, thereby improving the smoothness and convenience of assembly or disassembly between the inner cylinder and the outer cylinder. It also reduces component wear caused by friction and extends the service life of the lens structure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the lens structure provided in the embodiments of this application;

[0020] Figure 2 yes Figure 1 An exploded diagram of the lens structure;

[0021] Figure 3 yes Figure 1 A cross-sectional schematic diagram of the lens structure.

[0022] The following are the labeling elements in the figure:

[0023] 100. Lens structure; 101. Support; 10. Outer tube; 20. Inner tube; 30. Drive assembly; 11. Receiving cavity; 12. Second receiving groove; 121. Adapter hole; 31. Drive rod; 32. Gear; 33. Rack; 40. Rotating component; 41. Rotating shaft; 42. Roller; 21. Guide groove; Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0025] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are for ease of description only, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0026] Please see Figures 1 to 3 This application provides a lens structure 100 and a projection display device having the same.

[0027] Please see Figures 1 to 3The lens structure 100 includes an outer cylinder 10, an inner cylinder 20, and a rotating component 40. Both the outer cylinder 10 and the inner cylinder 20 are hollow structures. The inner cylinder 20 can be used to house optical components, which include multiple optical lenses. Both the inner cylinder 20 and the outer cylinder 10 have circular cross-sectional shapes, and the outer cylinder 10 has a receiving cavity 11. The inner cylinder 20 is at least partially slidably disposed in the receiving cavity 11. By sliding the inner cylinder 20 relative to the outer cylinder 10, the focal length of the optical components can be adjusted. Of course, by inserting the inner cylinder 20 into the receiving cavity 11 through its opening, the inner cylinder 20 and the outer cylinder 10 can be assembled, or by pulling the inner cylinder 20 out of the receiving cavity 11, the inner cylinder 20 and the outer cylinder 10 can be separated.

[0028] Please see Figures 1 to 3 The rolling surface of the rotating member 40 is a surface of revolution, and the rotating member 40 is located in the accommodating cavity 11. It can be understood that a surface of revolution refers to a curved surface formed by rotating a planar curve or a spatial curve around a fixed straight line (called the axis of revolution). In other words, it is a three-dimensional surface formed by rotating a shape around a line. In this embodiment, the rolling surface of the rotating member 40 is a cylindrical surface; in other embodiments, the surface can be selected according to the actual situation, and no limitation is made here.

[0029] The rotating member 40 is rotatably connected to the outer cylinder 10, and the rolling surface of the rotating member 40 abuts against the outer surface of the inner cylinder 20. When the inner cylinder 20 slides relative to the outer cylinder 10, for example, when the inner cylinder 20 is inserted into the receiving cavity 11, the rolling surface of the rotating member 40 abuts against the inner cylinder 20, and under the drive of the inner cylinder 20, the rotating member 40 rotates around its rotation center, thereby changing the sliding friction between the inner cylinder 20 and the outer cylinder 10 into rolling friction between the rotating member 40 and the inner cylinder 20, reducing the contact area between the inner cylinder 20 and the outer cylinder 10, thereby reducing the friction between the inner cylinder 20 and the outer cylinder 10.

[0030] Please see Figures 1 to 3 The rotating member 40 is rotatably connected to the inner cylinder 20, and the rolling surface of the rotating member 40 abuts against the cavity wall of the receiving cavity 11. When the inner cylinder 20 and the outer cylinder 10 slide relative to each other, for example, when the inner cylinder 20 is pulled out of the receiving cavity 11, the rolling surface of the rotating member 40 abuts against the cavity wall of the receiving cavity 11. When the inner cylinder 20 and the outer cylinder 10 slide relative to each other, the rotating member 40 can be driven to rotate around its rotation center, thereby changing the sliding friction between the inner cylinder 20 and the outer cylinder 10 into rolling friction between the rotating member 40 and the cavity wall of the receiving cavity 11, reducing the contact area between the inner cylinder 20 and the outer cylinder 10, and ultimately reducing the friction between the inner cylinder 20 and the outer cylinder 10.

[0031] The lens structure 100 provided in this application embodiment, by making the rolling surface of the rotating member 40 a rotational surface, and the rotating member 40 rotatably connected to the outer cylinder 10 or the inner cylinder 20, with its rolling surface abutting against the outer surface of the inner cylinder 20 or the cavity wall of the receiving cavity 11, can reduce the frictional force when the inner cylinder 20 and the outer cylinder 10 slide relative to each other, thereby improving the smoothness and convenience of assembly or disassembly between the inner cylinder 20 and the outer cylinder 10. It also reduces component wear caused by friction, extending the service life of the lens structure 100.

[0032] Please see Figures 1 to 3 In some embodiments, the rotating member 40 is rotatably connected to the inner cylinder 20, and a first receiving groove is provided on the outer surface of the inner cylinder 20. The first receiving groove extends along the direction in which the inner cylinder 20 is inserted into the receiving cavity 11 or the direction in which the inner cylinder 20 is pulled out of the receiving cavity 11, that is, it can also extend along the axial direction of the inner cylinder 20 or the outer cylinder 10. The two ends of the rotating member 40 are respectively rotatably connected to the groove walls on opposite sides of the first receiving groove, and the rotating member 40 is partially exposed from the first receiving groove and abuts against the outer cylinder 10.

[0033] Optionally, the first receiving groove extends along the length of the inner cylinder 20, and the rotating part 40 is partially housed in the first receiving groove, thereby reducing the overall size of the inner cylinder 20. The first receiving groove can also position and protect the rotating part 40, so that the rotating part 40 can rotate stably in the first receiving groove, avoiding the displacement or instability of the rotating part 40 during the relative sliding process between the inner cylinder 20 and the outer cylinder 10.

[0034] It is understandable that multiple rotating parts 40 can be arranged at intervals in the first receiving groove. Each rotating part 40 is arranged at equal intervals along the extension direction of the first receiving groove. By setting multiple rotating parts 40, multiple points of support can be provided for the inner cylinder 20, thereby improving the stability of the inner cylinder 20 when it slides relative to each other.

[0035] Please see Figures 1 to 3 It is also understandable that multiple first receiving slots are arranged circumferentially around the inner cylinder 20, and each first receiving slot is provided with a rotating part 40. Thus, the friction between the inner cylinder 20 and the outer cylinder 10 can be further reduced through multiple first receiving slots, thereby improving the convenience of assembling or disassembling the inner cylinder 20 and the outer cylinder 10.

[0036] Please see Figure 3In some embodiments, the rotating member 40 is rotatably connected to the outer cylinder 10, and the cavity wall of the receiving cavity 11 is provided with a second receiving groove 12. The second receiving groove 12 extends along the direction in which the inner cylinder 20 is inserted into the receiving cavity 11 or the direction in which the inner cylinder 20 is pulled out of the receiving cavity 11, that is, it can also extend along the axial direction of the inner cylinder 20 or the outer cylinder 10. The two ends of the rotating member 40 are respectively rotatably connected to the groove walls on opposite sides of the second receiving groove 12, and the rotating member 40 is partially exposed from the second receiving groove 12 and abuts against the inner cylinder 20.

[0037] Please see Figure 3 It can be understood that, with the axial direction of the inner or outer cylinder as the X direction, and one radial direction of the inner or outer cylinder as the Y direction, the length direction of the second receiving groove 12 is along the X direction, while the groove depth direction of the second receiving groove 12 is along the Y direction.

[0038] Please see Figures 1 to 3 Optionally, the second receiving groove 12 extends along the length of the outer cylinder 10, and the rotating part 40 is partially housed in the second receiving groove 12, thereby reducing the overall size of the outer cylinder 10. The second receiving groove 12 can also position and protect the rotating part 40, so that the rotating part 40 rotates stably in the second receiving groove 12, avoiding the displacement or instability of the rotating part 40 during the relative sliding process between the inner cylinder 20 and the outer cylinder 10.

[0039] Optionally, by mounting the rotating component 40 on the outer cylinder 10, it is easier to process and maintain the outer cylinder 10, while maintaining a low-friction, high-stability sliding effect, thereby improving the assembly flexibility and focusing accuracy of the lens structure 100.

[0040] Please see Figures 1 to 3 It is understood that in this embodiment, the cross-sectional shape of the second receiving groove 12 is polygonal, such as rectangular, and the two opposite ends of the rotating member 40 are respectively rotatably connected to the opposite two sides of the groove wall of the second receiving groove 12.

[0041] Please see Figures 1 to 3 In some embodiments, a guide groove 21 is provided on the outer surface of the inner cylinder 20, and the rotating member 40 abuts against the bottom of the guide groove 21. The guide groove 21 is used to guide the inner cylinder 20 to move relative to the rotating member 40. It can be understood that when the inner cylinder 20 slides relative to the outer cylinder 10, the rotating surface of the rotating member 40 rolls into contact with the bottom of the guide groove 21, and the guide groove 21 guides the inner cylinder 20 to slide smoothly relative to the outer cylinder 10.

[0042] Please see Figures 1 to 3 In some embodiments, multiple rotating members 40 are arranged at intervals along the second receiving groove 12.

[0043] Optionally, by providing multiple rotating members 40 within the second receiving groove 12, the support stability and friction reduction effect during the sliding of the inner cylinder 20 and the outer cylinder 10 can be enhanced. The distribution of multiple rotating members 40 ensures that the inner cylinder 20 receives multi-point support during sliding, and the force is evenly distributed, avoiding the problems of local force concentration or unstable sliding that may be caused by a single rotating member 40.

[0044] Each rotating component 40 is arranged at equal intervals in the second receiving groove 12, and three rotating components 40 are provided in any second receiving groove 12. In other embodiments, four or more rotating components 40 may also be provided. There is no limitation here, and the selection can be made according to the actual situation.

[0045] Please see Figures 1 to 3 In some embodiments, multiple second receiving grooves 12 are arranged circumferentially around the outer cylinder 10, and each second receiving groove 12 is provided with the rotating member 40.

[0046] Optionally, multiple second receiving slots 12 are arranged along the circumference of the outer cylinder 10, which can improve the uniformity and stability of the circumferential support of the inner cylinder 20, so that multiple rotating parts 40 are evenly distributed in the circumference of the outer cylinder 10, and the inner cylinder 20 is subjected to balanced support forces in multiple directions when sliding, thus avoiding tilting or swaying problems caused by unidirectional support.

[0047] Please see Figures 1 to 3 In some embodiments, each of the second receiving grooves 12 is arranged with equal arc around the circumference of the outer cylinder 10.

[0048] Optionally, in this embodiment, four second receiving grooves 12 are provided. The four second receiving grooves 12 are arranged with equal arc along the circumference of the outer cylinder 10 to ensure that the rotating parts 40 are symmetrically distributed in the circumference of the outer cylinder 10, so that the inner cylinder 20 and the outer cylinder 10 have sufficient coaxiality, and the supporting force on the inner cylinder 20 during the sliding process is evenly distributed in the circumference, avoiding sliding deviation or jamming caused by uneven force.

[0049] Please see Figures 1 to 3 In some embodiments, the rotating member 40 includes a rotating shaft 41 and a rolling wheel 42 connected to the rotating shaft 41, the rotating shaft 41 being rotatably connected to the outer cylinder 10 and the rolling wheel 42 abutting against the inner cylinder 20.

[0050] Please see Figure 3 Optionally, when the rotating shaft 41 is connected to the outer cylinder 10, transition holes 121 can be opened on both sides of the second receiving groove 12, and the two ends of the rotating shaft 41 can be rotatably set in the two transition holes 121 respectively, so that the rotating part 40 can be rotated. During the process of the inner cylinder 20 sliding relative to the outer cylinder 10, the rotating shaft 41 rotates in the two transition holes 121, so that the rolling wheel 42 can roll and contact the inner cylinder 20.

[0051] Optionally, the rotating shaft 41 is rotatably connected to the inner cylinder 20 and the rolling wheel 42 abuts against the outer cylinder 10. That is, when the rotating shaft 41 is connected to the inner cylinder 20, transition holes 121 can be opened on both sides of the first receiving groove, and then the two ends of the rotating shaft 41 can be rotatably set in the two transition holes 121 respectively; thereby realizing the rotation setting of the rotating component 40. During the sliding process of the inner cylinder 20 relative to the outer cylinder 10, the rotating shaft 41 rotates in the two transition holes 121, so that the rolling wheel 42 can roll and contact the outer cylinder 10.

[0052] Of course, it is also understandable that the two sides of the rolling wheel 42 can respectively abut against the inner cylinder 20 and the outer cylinder 10, thereby reducing the friction when the inner cylinder 20 and the outer cylinder 10 slide relative to each other.

[0053] Please see Figures 1 to 3 In some embodiments, the roller 42 is made of an elastic material and each of the rollers 42 is in an elastic deformation state.

[0054] Optionally, the elastic material can be rubber or silicone. The rolling wheel 42 has a certain degree of elasticity, which can absorb minor vibrations or impacts during rolling, reducing wear or noise that may be caused by hard contact. At the same time, the rolling wheel 42 can deform slightly when in contact with the inner cylinder 20 or the outer cylinder 10, increasing the contact area and creating tension between the inner cylinder 20 and the outer cylinder 10, preventing the inner cylinder 20 from wobbling relative to the outer cylinder 10, and improving the stability and reliability during the projection process.

[0055] Please see Figures 1 to 3 In some embodiments, the lens structure 100 further includes a drive assembly 30, which includes a rack 33 located in the inner cylinder 20, a gear 32 rotatably connected to the outer cylinder 10 and meshing with the rack 33, and a drive rod 31 rotatably connected to the outer cylinder 10 and used to drive the gear 32.

[0056] Optionally, the rack 33 is located on the outer surface of the inner cylinder 20, the gear 32 is rotatably located in the accommodating cavity 11 and rotatably connected to the outer cylinder 10, and the drive rod 31 is provided with an external thread that matches the gear 32. The drive rod 31 is driven to rotate by an external torque, thereby driving the gear 32 to rotate, and then driving the rack 33 to slide, ultimately realizing the sliding of the inner cylinder 20 relative to the outer cylinder 10. By changing the rotation direction of the drive rod 31, the sliding direction of the inner cylinder 20 can be changed.

[0057] Please see Figures 1 to 3This utility model also proposes a projection display device, which includes a lens structure 100. The specific structure of the lens structure 100 is as described in the above embodiments. Since this projection display device adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0058] In some embodiments, the projection display device further includes a bracket 101 for fixing the lens structure 100, and one end of the outer cylinder 10 is connected to the bracket 101.

[0059] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A lens structure (100), characterized in that, include: The outer cylinder (10), inner cylinder (20), and rotating member (40) are provided. The outer cylinder (10) has a receiving cavity (11). The inner cylinder (20) is at least partially slidably disposed in the receiving cavity (11). The rolling surface of the rotating member (40) is a rotating surface. The rotating member (40) is located in the receiving cavity (11). The rotating member (40) is rotatably connected to the outer cylinder (10) and the rolling surface of the rotating member (40) abuts against the outer surface of the inner cylinder (20), or the rotating member (40) is rotatably connected to the inner cylinder (20) and the rolling surface of the rotating member (40) abuts against the cavity wall of the receiving cavity (11). When the inner cylinder (20) slides relative to the outer cylinder (10), it drives the rotating member (40) to rotate.

2. The lens structure (100) as described in claim 1, characterized in that: The rotating member (40) is rotatably connected to the inner cylinder (20), and a first receiving groove is provided on the outer surface of the inner cylinder (20). The first receiving groove extends along the axial direction of the inner cylinder (20) or the outer cylinder (10). The two ends of the rotating member (40) are rotatably connected to the groove walls on opposite sides of the first receiving groove, and the rotating member (40) is partially exposed from the first receiving groove and abuts against the outer cylinder (10).

3. The lens structure (100) as described in claim 1, characterized in that: The rotating member (40) is rotatably connected to the outer cylinder (10), and the cavity wall of the accommodating cavity (11) is provided with a second accommodating groove (12). The second accommodating groove (12) extends along the axial direction of the inner cylinder (20) or the outer cylinder (10). The two ends of the rotating member (40) are rotatably connected to the groove walls on opposite sides of the second accommodating groove (12), and the rotating member (40) is partially exposed from the second accommodating groove (12) and abuts against the inner cylinder (20).

4. The lens structure (100) as described in claim 3, characterized in that: The outer surface of the inner cylinder (20) is provided with a guide groove (21), and the rotating member (40) abuts against the bottom of the guide groove (21). The guide groove (21) is used to guide the inner cylinder (20) to move relative to the rotating member (40).

5. The lens structure (100) as described in claim 3, characterized in that: The rotating parts (40) are arranged in multiple intervals along the second receiving groove (12).

6. The lens structure (100) as described in claim 3, characterized in that: Multiple second receiving grooves (12) are arranged circumferentially around the outer cylinder (10), and each second receiving groove (12) is provided with the rotating member (40).

7. The lens structure (100) as described in any one of claims 1-6, characterized in that: The rotating component (40) includes a rotating shaft (41) and a rolling wheel (42) connected to the rotating shaft (41). The rotating shaft (41) is rotatably connected to the outer cylinder (10), and the rolling wheel (42) abuts against the inner cylinder (20).

8. The lens structure (100) as described in claim 7, characterized in that: The rolling wheel (42) is made of elastic material and each of the rolling wheels (42) is in an elastic deformation state.

9. The lens structure (100) as described in any one of claims 1-6, characterized in that: The lens structure (100) further includes a drive assembly (30), which includes a rack (33) located in the inner cylinder (20), a gear (32) rotatably connected to the outer cylinder (10) and meshing with the rack (33), and a drive rod (31) rotatably connected to the outer cylinder (10) and used to drive the gear (32).

10. A projection display device, characterized in that, include: The lens structure (100) as described in any one of claims 1-9.

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