Compensation structure and projection equipment
By designing a compensation structure in the optical device, the thermal expansion of the compensation member drives the lens housing movement, automatic adjustment of the focal length of the optical lens is achieved, the image blur problem caused by thermal expansion in the optical device is solved, and the image clarity is improved.
Patent Information
- Application Number
- CN202420989631.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-08
AI Technical Summary
The thermal expansion of electronic devices in optical devices causes changes in the focal position of the optical lens, causing blurred images. The prior art cannot realize automatic adjustment of the position of the optical lens structural member.
A compensation structure is designed, including a base, a compensator and a lens housing. By setting a housing cavity and a guide portion on the base, the thermal expansion of the compensation member drives the lens housing movement to achieve the lens housing opposite to the base. Automatic position adjustment ensures the stability of the focal length of the optical lens.
Automatic adjustment of the focal length of the optical lens is achieved, reducing the risk of deflection caused by thermal expansion, improving image clarity, and avoiding the need for manual or delayed adjustment.
Smart Images
Figure CN222354269U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of optical equipment, and in particular to a compensation structure and a projection device. Background Art
[0002] The electronic devices in the optical equipment will generate heat during operation. The heat is transferred to the structural parts and optical lenses in the optical equipment, causing the structural parts and optical lenses to expand thermally, thereby changing the focal position of the optical lens, and further blurring the image formed by the light beam passing through the optical lens.
[0003] In the related art, a driving mechanism for adjusting the position of an optical lens is provided in an optical device, so as to adjust the focal length of the optical lens so that the image can be restored to the required clarity. However, such an adjustment process has a delay, or requires manual adjustment by the user, and cannot achieve automatic adjustment of the position of the structural member for mounting the optical lens. Utility Model Content
[0004] The present application provides a compensation structure and a projection device, which can realize automatic adjustment of the position of a lens housing relative to a base.
[0005] On the one hand, the present application provides a compensation structure, which includes: a base, a compensation piece and a lens housing; wherein the base has a accommodating cavity, the accommodating cavity has a first opening and a second opening that are connected to each other; the first end of the compensation piece is connected to the edge of the first opening, at least a portion of the compensation piece is located in the accommodating cavity, and the second end of the compensation piece is located adjacent to the second opening; one end of the lens housing is located in the compensation piece and connected to the second end of the compensation piece, and the other end of the lens housing is located near the first end of the compensation piece; the lens housing is used to install an optical lens; in the process of temperature change of the compensation piece, the length of the compensation piece changes along the axial direction of the accommodating cavity to drive the lens housing to move relative to the base.
[0006] The compensation structure provided by the present application is provided with a base, so that the compensation structure can be installed in a device or apparatus through the base, and a receiving cavity is provided on the base, so that at least a part of the compensation member can be located in the receiving cavity. At the same time, the first end of the compensation member is connected to the edge of the first opening of the receiving cavity, and the second end of the compensation member is located at a position adjacent to the second opening of the receiving cavity, and one end of the lens housing is connected to the second end of the compensation member. In this way, during the temperature change of the compensation structure, the length of the base along the axis direction of the receiving cavity will change due to thermal expansion, which will drive the compensation member and the lens housing to move, and the length of the compensation member will also change due to thermal expansion, and the compensation member will drive the lens housing to move in the opposite direction relative to the base. By selecting the material and length of the compensation member, the lens housing can be prevented from being displaced relative to the second opening of the base, thereby realizing automatic adjustment of the position of the lens housing relative to the base.
[0007] In a possible implementation of the present application, the axial direction of the accommodating cavity and the axial direction of the compensating member are in a parallel relationship.
[0008] In the technical solution of the present application, since the axial direction of the accommodating cavity and the axial direction of the compensating member are parallel, during the process of thermal expansion of both the base and the compensating member, the lengths of the base and the compensating member can be changed along the same straight line as much as possible along the axial direction of the accommodating cavity, thereby reducing the risk of deflection of the lens housing caused by the base and / or the compensating member during thermal expansion.
[0009] In a possible implementation of the present application, the compensating member has a guiding portion, and when the temperature of the compensating member changes, the guiding portion is used to guide the compensating member to change in length along the axial direction of the accommodating cavity.
[0010] In the technical solution of the present application, since a guide portion is provided on the compensating member, the guide portion can guide the direction in which the compensating member is deformed during thermal expansion, and limit the amount of deformation of the compensating member in an undesired direction, so that the lens housing can be driven by the compensating member to move in a desired direction, so that the lens housing is in a desired position relative to the base.
[0011] In a possible implementation of the present application, the guide portion includes a plurality of guide ridges distributed on the wall of the compensating member along the circumferential direction of the compensating member, and the plurality of guide ridges are formed by extending from the wall along the axial direction of the compensating member.
[0012] In the technical solution of the present application, since the guide portion is provided as a structural form including a plurality of guide ridges, and the guide ridges are provided on the wall of the compensating member, the local thickness of the wall of the compensating member can be increased by the guide ridges, thereby reducing the amount of deformation of the compensating member in the radial direction during thermal expansion, and making the deformation of the compensating member occur as much as possible in the axial direction. At the same time, the guide ridges are extended along the axial direction of the compensating member, so that the structure of the compensating member in the axial direction can be made more stable and uniform, so that in the process of deformation of the compensating member in the axial direction, the bending deflection of the compensating member in the axial direction can also be reduced.
[0013] In one possible implementation of the present application, the first end of the compensating member has a base connecting portion, which extends from the edge of the first end along the radial direction of the compensating member in a direction away from the center of the compensating member; in the axial direction along the accommodating cavity, the compensating member and the base are fixedly connected through the base connecting portion.
[0014] In the technical solution of the present application, since a base connecting portion is provided on the first end of the compensating member and the base connecting portion is extended in the radial direction of the compensating member, the base connecting portion can be fixedly connected to the end face of the first opening of the base, so that the compensating member and the base can be fixedly connected along the axial direction of the accommodating cavity, thereby reducing the influence of the connection structure between the compensating member and the base on the compensating member along the axial direction of the accommodating cavity.
[0015] In a possible implementation of the present application, the compensating member has a compensating positioning portion, the base has a base positioning portion matching the compensating positioning portion, and the compensating positioning portion abuts against the base positioning portion to limit the installation position of the compensating member relative to the base.
[0016] In the technical solution of the present application, since a compensation positioning portion is provided on the compensation part and a base positioning portion is provided on the base, during the process of assembling the compensation part and the base, the compensation positioning portion and the base positioning portion can be abutted against each other to limit the position of the compensation part relative to the base, thereby limiting the compensation part to a certain and accurate installation position relative to the base.
[0017] In one possible implementation of the present application, the compensation positioning portion includes an axial compensation positioning surface, which is located on the surface of the base connecting portion close to the second end, and the base positioning portion includes an axial base positioning surface, which is located on the end surface of the first opening edge along the axial direction of the accommodating cavity; the axial compensation positioning surface abuts against the axial base positioning surface to limit the movement of the compensation member relative to the base along the axial direction of the accommodating cavity.
[0018] In the technical solution of the present application, since an axial compensation positioning surface is provided on the compensating member, and correspondingly, an axial base positioning surface is provided on the base, during the assembly of the compensating member and the base, the axial compensation positioning surface and the axial base positioning surface can be made to abut against each other, thereby limiting the assembly position of the compensating member relative to the base along the axial direction of the accommodating cavity. After the compensating member and the base are fixedly connected, the compensating member and the base can always be in a certain position through the axial compensation positioning surface and the axial base positioning surface, which is conducive to reducing the risk of displacement of the compensating member relative to the base along the axial direction of the accommodating cavity.
[0019] In one possible implementation of the present application, the compensation positioning portion includes a radial compensation positioning surface, which is located on the wall of the first end of the compensation member, and the base positioning portion includes a radial base positioning surface, which is located on the inner wall of the first opening edge of the accommodating cavity. The radial compensation positioning surface abuts against the radial base positioning surface to limit the movement of the compensation member relative to the base in the radial direction.
[0020] In the technical solution of the present application, since a radial compensation positioning surface is provided on the compensating member, and correspondingly, a radial base positioning surface is provided on the base, during the assembly of the compensating member and the base, the radial compensation positioning surface and the radial base positioning surface can be brought into contact with each other, thereby limiting the assembly position of the compensating member relative to the base in the radial direction. After the compensating member and the base are fixedly connected, the compensating member and the base can always be in a determined position through the radial compensation positioning surface and the radial base positioning surface, which is conducive to reducing the risk of displacement of the compensating member relative to the base in the radial direction.
[0021] In one possible implementation of the present application, the second end of the compensating member has a shell connecting portion, which extends from the edge of the second end along the radial direction of the compensating member toward the center of the compensating member; in the axial direction along the accommodating cavity, the lens housing and the compensating member are fixedly connected through the shell connecting portion.
[0022] In the technical solution of the present application, since a housing connection portion is provided at the second end of the compensating member, the lens housing and the second end of the compensating member can be fixedly connected via the housing connection portion. At the same time, the housing connection portion is formed to extend along the radial direction of the compensating member, so that the lens housing and the compensating member can be fixedly connected along the axial direction of the accommodating cavity, thereby reducing the influence of the connection structure between the lens housing and the compensating member on the compensating member along the axial direction of the accommodating cavity.
[0023] On the other hand, the present application provides a projection device, which includes: an optical-mechanical component, an optical lens, and a compensation structure provided by any one of the first aspects above; wherein the optical-mechanical component is connected to an end of a base in the compensation structure close to the second opening, and the optical lens is installed in a lens housing.
[0024] The projection device provided in the present application has the same technical effect because it includes any of the above-mentioned compensation structures, that is, the position of the lens housing relative to the optical-mechanical assembly can be automatically adjusted and compensated by the compensation component to achieve automatic adjustment of the focal length of the optical lens. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 A schematic diagram of the assembly of the compensation structure provided in this application;
[0026] Figure 2 A cross-sectional schematic diagram of the compensation structure provided in this application;
[0027] Figure 3 A schematic diagram of the structure of the base in the compensation structure provided in this application;
[0028] Figure 4 Schematic diagram of the structure of the compensation member in the compensation structure provided in this application Figure 1 ;
[0029] Figure 5 Schematic diagram of the structure of the compensation member in the compensation structure provided in this application Figure 2 .
[0030] Description of reference numerals:
[0031] 1-base; 11-accommodating cavity; 12-first opening; 13-second opening; 14-base positioning portion; 141-axial base positioning surface; 142-radial base positioning surface; 15-first threaded hole; 16-pre-positioning block; 2-compensating member; 21-first end; 22-second end; 23-guide portion; 24-wall; 25-base connecting portion; 251-first connecting through hole; 26-compensating positioning portion; 261-axial compensation positioning surface; 262-radial compensation positioning surface; 27-shell connecting portion; 271-second connecting through hole; 272-shell axial positioning surface; 28-shell radial positioning surface; 29-accommodating hole; 20-pre-positioning notch; 3-lens shell; 31-radial limiting protrusion; 4-optical lens; 5-first bolt; 6-second bolt; A-axial direction; F-first direction; S-second direction. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.
[0033] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.
[0034] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.
[0035] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.
[0036] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.
[0037] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.
[0038] Optical devices usually have optical lenses, which are used to change the transmission path of light. Light adjusted by the optical lens can form a clear image on the imaging surface. The distance between the optical lens and the imaging surface, that is, the change in focal length, has a great influence on the clarity of the image.
[0039] The electronic devices in the optical device will generate heat during operation. The heat is transferred to the structural parts in the optical device, causing the structural parts and the optical lens to undergo thermal expansion, which will also cause a slight change in the length of the structural parts. When the length of the structural part on which the optical lens is mounted changes due to thermal expansion, the focal length will change. In the related art, a driving mechanism for adjusting the focal length is provided in the optical device, so that when the focal length changes, the position of the structural part on which the optical lens is mounted can be adjusted by the driving mechanism to adjust the focal length of the optical lens so that the image is restored to the desired clarity. However, such an adjustment process often has a delay, or requires the user to make manual adjustments, and cannot achieve automatic adjustment of the position of the structural part on which the optical lens is mounted.
[0040] The present application provides a compensation structure that can automatically adjust the position of a lens housing for mounting an optical lens relative to a base in an optical device, so as to drive the optical lens mounted on the lens housing to move, so that the focal length of the optical lens is always maintained at an appropriate position. Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 shows a schematic diagram of the assembly of the compensation structure provided by the present application, Figure 2 shows a cross-sectional schematic diagram of the compensation structure provided by the present application, Figure 3 shows a schematic structural diagram of a base in the compensation structure provided by the present application, Figure 4 The structure of the compensation member in the compensation structure provided by the present application is shown in FIG. Figure 1 For the convenience of description and explanation, the compensation structure provided in the embodiment of the present application is explained below by taking a projection device as an example, but the compensation structure is not limited to be used only in a projection device. The compensation structure provided in the embodiment of the present application can be used in any applicable optical device.
[0041] The compensation structure provided in the embodiment of the present application includes: a base 1, a compensation member 2 and a lens housing 3; wherein the base 1 has a housing cavity 11, and the housing cavity 11 has a first opening 12 and a second opening 13 that are connected to each other; a first end 21 of the compensation member 2 is connected to the edge of the first opening 12, at least a portion of the compensation member 2 is located in the housing cavity 11, and a second end 22 of the compensation member 2 is located adjacent to the second opening 13; one end of the lens housing 3 is located in the compensation member 2 and connected to the second end 22 of the compensation member 2, and the other end of the lens housing 3 is located near the first end 21 of the compensation member 2; the lens housing 3 is used to install an optical lens 4; during the process of temperature change of the compensation member 2, the length of the compensation member 2 changes along the axial direction A of the housing cavity 11, so as to drive the lens housing 3 to move relative to the base 1.
[0042] In the embodiment of the present application, the base 1 is used to install the compensation structure in the required equipment or device. The overall shape of the base 1 can be designed according to the structure of other structural parts in the equipment or device using the compensation structure to facilitate the installation of the base 1 in the equipment or device.
[0043] For example, Figure 3 As shown, a plate-shaped portion connected to the device or apparatus may be provided on the base 1, and a receiving cavity 11 may be provided on the plate-shaped portion, so as to install the compensating member 2 and the lens housing 3 through the receiving cavity 11. For example, the receiving cavity 11 may be provided as a cylindrical through hole, that is, along the axial direction A of the receiving cavity 11, the two ends of the receiving cavity 11 respectively have a first opening 12 and a second opening 13, and the first opening 12 and the second opening 13 are connected through the receiving cavity 11. The base 1 may be made of plastic or metal material.
[0044] In the present application embodiment, Figure 1 and Figure 2 As shown, the lens housing 3 and the base 1 can be fixedly connected by the compensation member 2. The lens housing 3 can be designed according to the structure and quantity of the optical lens 4 to be installed. For example, the lens housing 3 can be set to a cylindrical structure. This facilitates the installation of the optical lens 4 in the cylindrical lens housing 3. Figure 4 As shown, the compensating member 2 can be set to a cylindrical structure, and the cylindrical compensating member 2 can be matched with the accommodating cavity 11 on the base 1. The lens housing 3 and the compensating member 2 can also be made of plastic or metal materials.
[0045] For example, the compensating member 2 may be configured to have a cylindrical shape. At least a portion of the cylindrical compensating member 2 may be disposed in the receiving cavity 11 of the base 1. A receiving hole 29 may also be formed on the compensating member 2, and the receiving hole 29 passes through the compensating member 2.
[0046] Another example, such as Figure 2As shown, the first end 21 of the compensating member 2 can be connected to the edge of the first opening 12 of the accommodating cavity 11 of the base 1, and the second end 22 of the compensating member 2 is located in the accommodating cavity 11, or the main body of the compensating member 2 is located in the accommodating cavity 11, and the second end 22 of the compensating member 2 is located near the second opening 13. That is, the compensating member 2 is inserted into the accommodating cavity 11, and the second end 22 of the compensating member 2 can be located in the accommodating cavity 11 or outside the accommodating cavity 11. At the same time, a part of the lens housing 3 can be arranged in the accommodating hole 29 on the compensating member 2, that is, one end of the lens housing 3 is inserted into the accommodating hole 29 of the compensating member 2, and this end of the lens housing 3 is fixedly connected to the second end 22 of the compensating member 2, and the other end of the lens housing 3 is located near the first end 21 of the compensating member 2, that is, the other end of the lens housing 3 can be located in the accommodating hole 29 of the compensating member 2 or outside the accommodating hole 29.
[0047] Thus, in the process of compensating the temperature rise of the structure, Figure 2 As shown, along the axial direction A of the accommodating cavity 11, with the plane where the second opening 13 on the base 1 is located as a reference, due to thermal expansion, the length of the base 1 is extended in the first direction F, so that the base 1 will drive the compensating member 2 and the lens housing 3 to move a small distance in the first direction F. At the same time, the compensating member 2 also undergoes thermal expansion, that is, with the plane where the first opening 12 on the base 1 is located as a reference, the length of the compensating member 2 is extended in the second direction S along the axial direction A of the accommodating cavity 11, so that the compensating member 2 will drive the lens housing 3 to move a small distance in the second direction S. Then, relative to the plane where the first opening 12 of the base 1 is located, the lens housing 3 can be kept in the original position without displacement, so that the optical lens 4 installed in the lens housing 3 can be prevented from being displaced along the axial direction A of the accommodating cavity 11 relative to the plane where the first opening 12 of the base 1 is located.
[0048] The compensation structure provided in the embodiment of the present application is provided with a base 1, so that the compensation structure can be installed in a device or apparatus through the base 1, and a receiving cavity 11 is provided on the base 1, so that at least a part of the compensation member 2 can be located in the receiving cavity 11. At the same time, the first end 21 of the compensation member 2 is connected to the edge of the first opening 12 of the receiving cavity 11, and the second end 22 of the compensation member 2 is located at a position adjacent to the second opening 13 of the receiving cavity 11, and one end of the lens housing 3 is connected to the second end 22 of the compensation member 2. In this way, during the temperature change of the compensation structure, along the axial direction A of the receiving cavity 11, the length of the base 1 will change due to thermal expansion, which will drive the compensation member 2 and the lens housing 3 to move, and the length of the compensation member 2 will also change due to thermal expansion, and the compensation member 2 will drive the lens housing 3 to move in the opposite direction relative to the base 1. By selecting the material and length of the compensation member 2, the lens housing 3 can be prevented from being displaced relative to the second opening 13 of the base 1, so that the position of the lens housing 3 relative to the base 1 can be automatically adjusted.
[0049] In some possible embodiments of the present application, the axial direction A of the accommodating cavity 11 of the base 1 and the axial direction A of the compensating member 2 are in a parallel relationship.
[0050] In the present application embodiment, Figure 2 As shown, the axis of the accommodating cavity 11 and the axis of the compensating member 2 can be arranged in a colinear manner. In view of manufacturing errors and assembly errors, the axis direction A of the accommodating cavity 11 and the axis direction A of the compensating member 2 can also be made parallel.
[0051] Exemplarily, the axial direction A of the accommodating chamber 11 and the axial direction A of the compensating member 2 can be made parallel to each other; or the axial direction A of the accommodating chamber 11 and the axial direction A of the compensating member 2 can have a small angle, such as making the angle between the axial direction A of the accommodating chamber 11 and the axial direction A of the compensating member 2 less than or equal to 0.5°, that is, making the axial direction A of the accommodating chamber 11 and the axial direction A of the compensating member 2 nearly parallel.
[0052] In the above embodiment, since the axial direction A of the accommodating cavity 11 and the axial direction A of the compensating member 2 are in a parallel relationship, during the process of thermal expansion of both the base 1 and the compensating member 2, the lengths of the base 1 and the compensating member 2 can be changed along the same straight line as much as possible along the axial direction A of the accommodating cavity 11, thereby reducing the risk of deflection of the lens housing 3 caused by the base 1 and / or the compensating member 2 during thermal expansion.
[0053] In some possible embodiments of the present application, the compensating member 2 has a guiding portion 23 , and when the temperature of the compensating member 2 changes, the guiding portion 23 is used to guide the compensating member 2 to change in length along the axial direction A of the lens housing 3 .
[0054] In the embodiment of the present application, the position of the optical lens 4 installed in the lens housing 3 relative to the base 1 is crucial to the clarity of the imaging. Therefore, during the thermal expansion of the compensating member 2, the compensating member 2 needs to change in length as much as possible in the desired direction.
[0055] For example, Figure 4 As shown, a guide portion 23 may be provided on the compensating member 2, so that the length change of the compensating member 2 during the thermal expansion process is limited to the axial direction A of the accommodating cavity 11 through the guide portion 23. For example, the guide portion 23 may be provided on the wall 24 of the compensating member 2, that is, the guide portion 23 may be provided inside or outside the wall 24 of the compensating member 2, so that the structural form of the wall 24 may be changed through the guide portion 23, so that the deformation direction and deformation amount of the wall 24 of the compensating member 2 during the thermal expansion process may be controlled. Then, the structural form of the guide portion 23 itself, as well as the distribution position and distribution number of the guide portion 23 on the wall 24, may be designed, so that the compensating member 2 may be guided to produce a length change along the axial direction A of the accommodating cavity 11 through the guide portion 23. That is, during the thermal expansion process of the compensating member 2, the maximum deformation amount of the compensating member 2 may occur as much as possible in the axial direction A of the accommodating cavity 11, and the possibility of the deflection of the compensating member 2 may be reduced.
[0056] In the above embodiment, since the guide portion 23 is provided on the compensation member 2, the guide portion 23 can guide the direction in which the compensation member 2 is deformed during thermal expansion, and limit the amount of deformation of the compensation member 2 in an undesired direction, so that the lens housing 3 can be driven by the compensation member 2 to move in a desired direction, so that the lens housing 3 is in a desired position relative to the base 1.
[0057] In some possible embodiments of the present application, the guide portion 23 includes a plurality of guide ridges distributed on the wall 24 of the compensating member 2 along the circumferential direction of the compensating member 2 , and the plurality of guide ridges are extended from the wall 24 along the axial direction A of the compensating member 2 .
[0058] In the present application embodiment, Figure 4 As shown, the guide portion 23 on the compensating member 2 can be configured as a structure of multiple guide ridges, that is, multiple guide ridges are configured on the wall 24 of the compensating member 2 to change the overall structure of the compensating member 2 through the guide ridges.
[0059] Exemplarily, along the circumferential direction of the compensating member 2, a plurality of guide ridges may be evenly distributed outside the wall 24 of the compensating member 2, and each guide ridge may be formed by extending from the wall 24 along the axial direction A of the compensating member 2. For example, 10, 15, 18, etc. guide ridges may be provided on the wall 24, and each guide ridge may extend from the first end 21 to the second end 22 of the compensating member 2.
[0060] In the above embodiment, since the guide portion 23 is provided as a structural form including a plurality of guide convex strips, and the guide convex strips are provided on the wall 24 of the compensating member 2, the local thickness of the wall 24 of the compensating member 2 can be increased by the guide convex strips, so that the deformation amount of the compensating member 2 in the radial direction during the thermal expansion process can be reduced, and the deformation amount of the compensating member 2 can be caused as much as possible in the axial direction A. At the same time, the guide convex strips are extended along the axial direction A of the compensating member 2, so that the structure of the compensating member 2 along the axial direction A can be made more stable and uniform, so that in the process of the compensating member 2 being deformed along the axial direction A, the bending deflection of the compensating member 2 along the axial direction A can also be reduced.
[0061] In some possible embodiments of the present application, refer to Figure 5 , Figure 5 The structure of the compensation member 2 in the compensation structure provided in this application is schematically shown. Figure 2 The first end 21 of the compensating member 2 has a base connection portion 25, which extends from the edge of the first end 21 of the compensating member 2 along the radial direction of the compensating member 2 in a direction away from the center of the compensating member 2; along the axial direction A of the accommodating cavity 11, the compensating member 2 is fixedly connected to the base 1 through the base connection portion 25.
[0062] In the embodiment of the present application, in order to facilitate the fixed connection between the first end 21 of the compensating member 2 and the base 1, a base connecting portion 25 may be provided at the first end 21 of the compensating member 2 so as to fix the compensating member 2 and the base 1 through the base connecting portion 25.
[0063] For example, Figure 4 and Figure 5 As shown, the base connection part 25 can be set to a convex ring structure, which is extended from the edge of the wall 24 of the first end 21 of the compensating member 2 in the radial direction of the compensating member 2, and extends from the edge of the wall 24 in a direction away from the center of the compensating member 2. For example, a first connecting through hole 251 can be set on the convex ring-shaped base connection part 25, such as three first connecting through holes 251 are evenly set on the base connection part 25 in the circumferential direction of the compensating member 2. Correspondingly, as shown in FIG. Figure 3 As shown, three first threaded holes 15 may be provided on the cavity wall of the accommodating cavity 11 of the base 1 , and the first threaded holes 15 are provided along the axial direction A of the accommodating cavity 11 .
[0064] In another example, the base connection portion 25 may be configured as a plurality of protrusions extending in the radial direction of the compensating member 2, such as three or four protrusions evenly distributed in the circumferential direction of the compensating member 2. A first connecting through hole 251 may be provided on each protrusion.
[0065] In this way, Figure 2 As shown, along the axial direction A of the accommodating chamber 11, the side surface of the base connecting portion 25 and the end surface of the first opening 12 of the accommodating chamber 11 can be abutted, and a first bolt 5 matching the first threaded hole 15 can be used to pass the first bolt 5 through the first connecting through hole 251 and screw it into the first threaded hole 15, so that the compensating member 2 and the base 1 can be fixedly connected by the first bolt 5, so that the compensating member 2 and the base 1 can be fixedly connected along the axial direction A of the accommodating chamber 11.
[0066] In the above embodiment, since a base connection portion 25 is provided on the first end 21 of the compensating member 2 and the base connection portion 25 is extended in the radial direction of the compensating member 2, the base connection portion 25 can be fixedly connected to the end surface of the first opening 12 of the base 1, so that the compensating member 2 and the base 1 can be fixedly connected along the axial direction A of the accommodating chamber 11, thereby reducing the influence of the connection structure between the compensating member 2 and the base 1 on the compensating member 2 along the axial direction A of the accommodating chamber 11.
[0067] In some possible embodiments of the present application, the compensating member 2 has a compensating positioning portion 26, and the base 1 has a base positioning portion 14 matching the compensating positioning portion 26. The compensating positioning portion 26 abuts against the base positioning portion 14 to limit the installation position of the compensating member 2 relative to the base 1.
[0068] In the embodiment of the present application, the accuracy of the assembly position of the compensating member 2 and the base 1, and the stability of the relative position of the compensating member 2 and the base 1 after assembly have a great influence on the performance of the supplementary structure. Corresponding positioning structures can be respectively provided on the compensating member 2 and the base 1 to improve the accuracy of the assembly position of the compensating member 2 and the base 1 and the stability of the relative position through the positioning structures.
[0069] For example, Figure 4 As shown, a compensation positioning portion 26 may be provided on the first end 21 of the compensation member 2. Correspondingly, as shown in FIG. Figure 3 As shown, a base positioning portion 14 can be provided at the edge of the first opening 12 on the base 1, and the base positioning portion 14 matches the compensation positioning portion 26. For example, the compensation positioning portion 26 and the base positioning portion 14 can be provided in a structural form capable of positioning the compensating member 2 and the base 1 along the axial direction A of the compensating member 2 and / or the radial direction.
[0070] In the above embodiment, since the compensation positioning portion 26 is provided on the compensation member 2 and the base positioning portion 14 is provided on the base 1, during the process of assembling the compensation member 2 and the base 1, the compensation positioning portion 26 and the base positioning portion 14 can be abutted against each other to limit the position of the compensation member 2 relative to the base 1, so that the compensation member 2 can be limited to a certain and accurate installation position relative to the base 1.
[0071] In some possible embodiments of the present application, the compensation positioning portion 26 includes an axial compensation positioning surface 261, which is located on the surface of the base connecting portion 25 close to the second end 22, and the base positioning portion 14 includes an axial base positioning surface 141, which is located on the end surface of the edge of the first opening 12 along the axial direction A of the accommodating cavity 11; the axial compensation positioning surface 261 abuts against the axial base positioning surface 141 to limit the movement of the compensation member 2 relative to the base 1 along the axial direction A of the accommodating cavity 11.
[0072] In the embodiment of the present application, along the axial direction A of the accommodating cavity 11 , the compensating member 2 can be positioned relative to the base 1 by the compensating positioning portion 26 on the compensating member 2 and the base positioning portion 14 on the base 1 .
[0073] For example, Figure 4 As shown, an axial compensation positioning surface 261 can be provided on the compensating member 2. For example, in the axial direction A along the compensating member 2, the axial compensation positioning surface 261 can be provided on the surface of the convex ring as the base connecting portion 25 close to the second end 22 of the compensating member 2, and each axial compensation positioning surface 261 protrudes from the surface of the base connecting portion 25 facing the second end 22 of the compensating member 2. In the circumferential direction along the compensating member 2, multiple axial compensation positioning surfaces 261 can be provided on the base connecting portion 25. For example, six axial compensation positioning surfaces 261 can be provided on the base connecting portion 25, or three or other numbers of axial compensation positioning surfaces 261 can be provided on the base connecting portion 25.
[0074] Correspondingly, if Figure 3As shown, an axial base positioning surface 141 can be provided on the base 1. For example, in the axial direction A along the accommodating cavity 11, the axial base positioning surface 141 can be provided on the end surface of the edge of the first opening 12 of the accommodating cavity 11. In the circumferential direction along the accommodating cavity 11, a plurality of axial base positioning surfaces 141 can be provided on the end surface of the edge of the first opening 12, and each axial base positioning surface 141 protrudes from the end surface of the edge of the first opening 12 on the base 1. For example, six axial base positioning surfaces 141 are provided on the base 1, and other numbers of axial base positioning surfaces 141 can also be provided on the base 1. The plurality of axial base positioning surfaces 141 and the plurality of axial compensation positioning surfaces 261 correspond to each other one by one. In this way, when the axial base positioning surface 141 and the axial compensation positioning surface 261 are abutted, the position of the compensating member 2 relative to the base 1 in the axial direction A along the accommodating cavity 11 can be limited.
[0075] In the above embodiment, since the axial compensation positioning surface 261 is provided on the compensating member 2, and correspondingly, the axial base positioning surface 141 is provided on the base 1, during the assembly of the compensating member 2 and the base 1, the axial compensation positioning surface 261 and the axial base positioning surface 141 can be made to abut against each other, thereby limiting the assembly position of the compensating member 2 relative to the base 1 along the axial direction A of the accommodating cavity 11. After the compensating member 2 is fixedly connected to the base 1, the compensating member 2 and the base 1 can always be in a determined position through the axial compensation positioning surface 261 and the axial base positioning surface 141, which is conducive to reducing the risk of displacement of the compensating member 2 relative to the base 1 along the axial direction A of the accommodating cavity 11.
[0076] In some possible embodiments of the present application, the compensation positioning portion 26 includes a radial compensation positioning surface 262, which is located on the wall 24 of the first end 21 of the compensation member 2. The base positioning portion 14 includes a radial base positioning surface 142, which is located on the inner wall of the edge of the first opening 12 of the accommodating cavity 11. The radial compensation positioning surface 262 abuts against the radial base positioning surface 142 to limit the movement of the compensation member 2 relative to the base 1 in the radial direction.
[0077] In the embodiment of the present application, along the radial direction of the compensating member 2 , the compensating member 2 can be positioned relative to the base 1 by the compensating positioning portion 26 on the compensating member 2 and the base positioning portion 14 on the base 1 .
[0078] For example, Figure 4As shown, a radial compensation positioning surface 262 can be provided on the compensating member 2. For example, in the radial direction along the compensating member 2, the radial compensation positioning surface 262 can be provided outside the wall body 24 of the compensating member 2, and at the same time, the radial compensation positioning surface 262 can be provided on the wall body 24 near the first end 21 of the compensating member 2, that is, the radial compensation positioning surface 262 is adjacent to the axial compensation positioning surface 261. And in the circumferential direction along the compensating member 2, a plurality of radial compensation positioning surfaces 262 can be provided on the wall body 24. Each radial compensation positioning surface 262 protrudes from the surface of the wall body 24 and is higher than the guide ridge serving as the guide portion 23. For example, six radial compensation positioning surfaces 262 are provided on the wall body 24, or three or other numbers of radial compensation positioning surfaces 262 can be provided on the wall body 24.
[0079] Correspondingly, if Figure 3 As shown, a radial base positioning surface 142 can be provided on the base 1. For example, in the radial direction along the accommodating cavity 11, the radial base positioning surface 142 can be provided on the inner wall of the edge of the first opening 12 of the accommodating cavity 11, and the radial base positioning surface 142 protrudes from the inner wall of the accommodating cavity 11. In the circumferential direction along the accommodating cavity 11, a plurality of radial base positioning surfaces 142 can be provided on the inner wall of the edge of the first opening 12 of the accommodating cavity 11, such as providing six radial base positioning surfaces 142 on the inner wall of the accommodating cavity 11, or providing other numbers of radial base positioning surfaces 142 on the inner wall of the accommodating cavity 11. In this way, the plurality of radial base positioning surfaces 142 and the plurality of radial compensation positioning surfaces 262 correspond to each other one by one. When the radial base positioning surface 142 and the radial compensation positioning surface 262 are abutted, the position of the compensating member 2 relative to the base 1 in the radial direction along the compensating member 2 can be limited.
[0080] Another example, such as Figure 3 As shown, in the axial direction A of the accommodating cavity 11, a pre-positioning block 16 can be provided on the end surface of the edge of the first opening 12 of the accommodating cavity 11. Correspondingly, as shown in FIG. Figure 4 As shown, a pre-positioning notch 20 matching the pre-positioning block 16 can be provided on the base connection portion 25 of the compensating member 2. In this way, during the assembly of the compensating member 2 and the base 1, the pre-positioning block 16 can be located in the pre-positioning notch 20, so as to limit the assembly position of the compensating member 2 relative to the base 1 along the circumferential direction of the compensating member 2.
[0081] In the above embodiment, since the radial compensation positioning surface 262 is provided on the compensating member 2, and correspondingly, the radial base positioning surface 142 is provided on the base 1, during the assembly of the compensating member 2 and the base 1, the radial compensation positioning surface 262 and the radial base positioning surface 142 can be made to abut against each other, thereby limiting the assembly position of the compensating member 2 relative to the base 1 in the radial direction. After the compensating member 2 is fixedly connected to the base 1, the compensating member 2 and the base 1 can always be in a determined position through the radial compensation positioning surface 262 and the radial base positioning surface 142, which is conducive to reducing the risk of displacement of the compensating member 2 relative to the base 1 in the radial direction.
[0082] In some possible embodiments of the present application, the second end 22 of the compensating member 2 has a shell connecting portion 27, and the shell connecting portion 27 extends from the edge of the second end 22 along the radial direction of the compensating member 2 toward the center of the compensating member 2; in the axial direction A along the accommodating cavity 11, the lens housing 3 and the compensating member 2 are fixedly connected through the shell connecting portion 27.
[0083] In the present application embodiment, Figure 4 and Figure 5 As shown, in order to facilitate fixed installation of the lens housing 3 and the compensating member 2 , a housing connecting portion 27 may be provided at the second end 22 of the compensating member 2 , so as to fixedly connect the lens housing 3 and the compensating member 2 via the housing connecting portion 27 .
[0084] Exemplarily, the housing connection portion 27 may be provided in the form of a convex ring structure. The convex ring-shaped housing connection portion 27 is formed by extending from the edge of the second end 22 of the compensating member 2, and is formed by extending in the radial direction of the compensating member 2 toward the center of the compensating member 2. For example, a second connecting through hole 271 may be provided on the convex ring-shaped housing connection portion 27, and correspondingly, a second threaded hole may be provided at one end of the lens housing 3, and the second threaded hole is formed by extending along the axial direction A of the accommodating cavity 11.
[0085] In this way, Figure 2 As shown, along the axial direction A of the accommodating cavity 11, the end face of one end of the lens housing 3 can be abutted against the housing connecting portion 27, and a second bolt 6 matching the second threaded hole is used to pass the second bolt 6 through the second connecting through hole 271 and screwed into the second threaded hole, so that the lens housing 3 can be fixedly connected to the compensation member 2.
[0086] Another example, such as Figure 5As shown, along the axial direction A of the compensating member 2, a housing axial positioning surface 272 can be provided on the surface of the housing connecting portion 27 close to the first end 21 of the compensating member 2, and the housing axial positioning surface 272 protrudes from the surface of the housing connecting portion 27. Correspondingly, a first limiting surface matching the housing axial positioning surface 272 can be provided on the end surface of one end of the lens housing 3. In this way, the first limiting surface can be brought into contact with the housing axial positioning surface 272 to limit and determine the position of the lens housing 3 relative to the compensating member 2 along the axial direction A of the accommodating cavity 11.
[0087] Another example, Figure 4 and Figure 5 As shown, a housing radial positioning surface 28 can be provided on the inner wall of the receiving hole 29 of the compensating member 2. The housing radial positioning surface 28 can be provided on the inner wall of the receiving hole 29 at a position close to the first end 21 of the compensating member 2. The housing radial positioning surface 28 extends along the circumferential direction of the compensating member 2 and protrudes from the inner wall of the receiving hole 29. Correspondingly, a second limiting surface matching the housing radial positioning surface 28 can be provided on the outer wall of the lens housing 3. In this way, when one end of the lens housing 3 is fixedly connected to the second end 22 of the compensating member 2, the second limiting surface can be brought into contact with the housing radial positioning surface 28 to limit the deflection of the lens housing 3 relative to the compensating member 2 in the axial direction A of the accommodating cavity 11.
[0088] In the above embodiment, since the housing connection portion 27 is provided at the second end 22 of the compensating member 2, the lens housing 3 can be fixedly connected to the second end 22 of the compensating member 2 through the housing connection portion 27. At the same time, the housing connection portion 27 is formed to extend along the radial direction of the compensating member 2, so that the lens housing 3 and the compensating member 2 can be fixedly connected in the axial direction A of the accommodating chamber 11, thereby reducing the influence of the connection structure between the lens housing 3 and the compensating member 2 on the compensating member 2 in the axial direction A of the accommodating chamber 11.
[0089] In addition, an embodiment of the present application also provides a projection device, which includes: an optical-mechanical component, an optical lens 4 and a compensation structure provided by any one of the above embodiments; wherein the optical-mechanical component is connected to one end of the base 1 close to the second opening 13, and the optical lens 4 is installed in the lens housing 3.
[0090] In the embodiment of the present application, the optical-mechanical assembly is used to generate projection light. The optical lens 4 can be a convex lens, a concave lens, or one or more of a flat lens. The optical lens 4 can be installed in the lens housing 3. The optical-mechanical assembly can be fixedly connected to one end of the second opening 13 of the accommodating cavity 11 of the base 1 in the compensation structure. The projection light generated by the optical-mechanical assembly can be processed by the optical lens 4 so that the projection light is formed into a projection picture that can be displayed on a curtain or a wall.
[0091] The projection device provided in the embodiment of the present application includes the compensation structure provided in any one of the above embodiments. Therefore, the position of the lens housing 3 relative to the optical-mechanical assembly can be automatically adjusted and compensated by the compensation component 2 to achieve automatic adjustment of the focal length of the optical lens 4.
[0092] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.
Claims
1. A compensation structure, characterized in that: include: A base (1), the base (1) having a receiving cavity (11), the receiving cavity (11) having a first opening (12) and a second opening (13) which are connected to each other; a compensating member (2), wherein a first end (21) of the compensating member (2) is connected to an edge of the first opening (12), at least a portion of the compensating member (2) is located in the accommodating cavity (11), and a second end (22) of the compensating member (2) is located adjacent to the second opening (13); A lens housing (3), one end of the lens housing (3) being located inside the compensating member (2) and connected to the second end (22) of the compensating member (2), and the other end of the lens housing (3) being located close to the first end (21) of the compensating member (2); the lens housing (3) being used for mounting an optical lens (4); Wherein, during the process of the temperature of the compensation component (2) changing, the length of the compensation component (2) changes along the axial direction of the accommodating cavity (11), thereby driving the lens housing (3) to move relative to the base (1).
2. The compensation structure according to claim 1, characterized in that: The axial direction of the accommodating cavity (11) and the axial direction of the compensating member (2) are in a parallel relationship.
3. The compensation structure according to claim 1, characterized in that: The compensating member (2) has a guiding portion (23), and when the temperature of the compensating member (2) changes, the guiding portion (23) is used to guide the compensating member (2) to change in length along the axial direction of the accommodating cavity (11).
4. The compensation structure according to claim 3, characterized in that: The guide portion (23) comprises a plurality of guide ridges distributed on the wall (24) of the compensating member (2) along the circumferential direction of the compensating member (2), and the plurality of guide ridges are formed by extending from the wall (24) along the axial direction of the compensating member (2).
5. The compensation structure according to any one of claims 1 to 4, characterized in that: The first end (21) of the compensating member (2) has a base connecting portion (25), and the base connecting portion (25) extends from the edge of the first end (21) along the radial direction of the compensating member (2) in a direction away from the center of the compensating member (2); along the axial direction of the accommodating cavity (11), the compensating member (2) and the base (1) are fixedly connected via the base connecting portion (25).
6. The compensation structure according to claim 5, characterized in that: The compensating member (2) has a compensating positioning portion (26), and the base (1) has a base positioning portion (14) matching the compensating positioning portion (26). The compensating positioning portion (26) abuts against the base positioning portion (14) to limit the installation position of the compensating member (2) relative to the base (1).
7. The compensation structure according to claim 6, characterized in that: The compensating positioning portion (26) includes an axial compensating positioning surface (261), and the axial compensating positioning surface (261) is located on the surface of the base connecting portion (25) close to the second end (22). The base positioning portion (14) includes an axial base positioning surface (141), and along the axial direction of the accommodating cavity (11), the axial base positioning surface (141) is located on the end surface of the edge of the first opening (12); the axial compensating positioning surface (261) abuts against the axial base positioning surface (141) to limit the movement of the compensating member (2) relative to the base (1) along the axial direction of the accommodating cavity (11).
8. The compensation structure according to claim 6, characterized in that: The compensating positioning portion (26) includes a radial compensating positioning surface (262), and the radial compensating positioning surface (262) is located on the wall (24) of the first end (21) of the compensating member (2). The base positioning portion (14) includes a radial base positioning surface (142), and the radial base positioning surface (142) is located on the inner wall of the edge of the first opening (12) of the accommodating cavity (11). The radial compensating positioning surface (262) abuts against the radial base positioning surface (142) to limit the movement of the compensating member (2) relative to the base (1) along the radial direction.
9. The compensation structure according to any one of claims 1 to 4, characterized in that: The second end (22) of the compensating member (2) has a shell connecting portion (27), and the shell connecting portion (27) extends from the edge of the second end (22) along the radial direction of the compensating member (2) toward the center of the compensating member (2); along the axial direction of the accommodating cavity (11), the lens housing (3) and the compensating member (2) are fixedly connected via the shell connecting portion (27).
10. A projection device, characterized in that: include: An optical-mechanical assembly, an optical lens (4), and a compensation structure as claimed in any one of claims 1 to 9; the optical-mechanical assembly is connected to an end of the base (1) close to the second opening (13), and the optical lens is installed in the lens housing (3).