Camera module temperature drift test installation tool
By designing a temperature drift test installation fixture for camera modules including base plate, bracket, press plate and rubber pad, the problem of low testing accuracy in the prior art is solved, and higher testing accuracy and stability are achieved.
Patent Information
- Application Number
- CN202421855033.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-02
AI Technical Summary
The existing camera module temperature drift testing equipment lacks fixtures for fixed camera modules, resulting in low testing accuracy.
A temperature drift test installation fixture for camera modules including bottom plate, bracket, press plate and rubber pad is designed. The camera module is fixed through the coordination of the placement groove on the bracket and press plate, and elastic compensation is provided through the rubber pad to reduce the impact of thermal expansion on the test accuracy.
The fixture significantly improves the accuracy of temperature drift tests by fixing the camera module and providing thermal expansion compensation, ensuring the stability and accuracy of the test.
Smart Images
Figure CN223053060U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of temperature drift test of camera modules, and particularly relates to a fixture for installing and testing the temperature drift of a camera module. Background Art
[0002] With the rapid development of technology and economy in the automotive industry, the usage rate of automobiles in people's lives in various countries around the world is increasing day by day, which makes the in-vehicle camera modules on automobiles increasingly important. There are more and more camera modules installed on automobiles, and people have higher and higher requirements for the resolution of in-vehicle camera modules at different temperatures. Automobile manufacturers need to design and accurately measure the temperature drift of camera modules. However, when testing the temperature drift of existing camera modules, the camera module is usually directly placed in the temperature drift test equipment, and no relevant fixture is designed to install and fix the camera module, resulting in low accuracy of the temperature drift test. Therefore, there is an urgent need for a fixture with high stability to fix the in-vehicle camera module for temperature drift test. Summary of the Utility Model
[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art. The utility model provides a fixture for installing and testing the temperature drift of a camera module, including:
[0004] A bottom plate, a bracket, a pressing plate and a first rubber pad;
[0005] The lower end of the bracket is fixedly connected to the bottom plate, and a placement groove is provided at the upper end of the bracket for accommodating the camera module to be tested;
[0006] The pressing plate includes a first through hole, the pressing plate is connected to the upper end of the bracket, and the first through hole is aligned with the placement groove. The pressing plate is used to fixedly install the camera module to be tested in the placement groove;
[0007] The first rubber pad includes a second through hole, the second through hole is aligned with the placement groove, and the first rubber pad is clamped between the bracket and the pressing plate.
[0008] Further, the coefficient of thermal expansion (CTE) of the bottom plate, the bracket and the pressing plate is less than 2×10^-6 / °C.
[0009] Further, the bottom plate, the bracket and the pressing plate are all made of invar material.
[0010] Further, the fixture for installing and testing the temperature drift of the camera module further includes a second rubber pad, and the second rubber pad is arranged in the placement groove for supporting the camera module to be tested.
[0011] Further, there are a plurality of the second rubber pads, and the plurality of second rubber pads are evenly distributed in the placement groove.
[0012] Further, both the first rubber pad and the second rubber pad are made of silicone rubber.
[0013] Further, an avoidance groove communicating with the placement groove is further provided at the upper end of the bracket, and the avoidance groove is located on the periphery of the placement groove.
[0014] Further, the pressing plate includes a butting plate and a butting groove. The first through hole is opened on the butting plate and communicates with the butting groove. The butting plate is used to abut against the to-be-tested camera module accommodated in the placement groove, and a part of the to-be-tested camera module is located in the butting groove.
[0015] Further, the camera module temperature drift test installation jig further includes a first screw, the first screw fixedly connects the pressing plate and the first rubber pad to the bracket, and the first screw is made of invar material.
[0016] Further, the camera module temperature drift test installation jig further includes a second screw, the second screw fixedly connects the lower end of the bracket to the bottom plate, and the second screw is made of invar material.
[0017] Compared with the prior art, the present utility model has the following beneficial effects: (1) The camera module temperature drift test installation jig fixes the to-be-tested camera module through the placement groove opened in the bracket and the pressing plate, ensuring the convenience of fixing the to-be-tested camera module; and the elastic first rubber pad is clamped between the bracket and the pressing plate to prevent the pressing plate from applying excessive pressure to the to-be-tested camera module and damaging the to-be-tested camera module. Moreover, during the temperature drift test, in order to prevent the influence of the expansion and contraction of the pressing plate or the bracket, the first rubber pad can also provide compensation to the to-be-tested camera module; at the same time, through holes are provided on the pressing plate and the first rubber pad to avoid the to-be-tested camera module, ensuring that light can pass through the pressing plate and the first rubber pad in sequence and enter the to-be-tested camera module, ensuring that the to-be-tested camera module can perform optical tests without detaching from the jig. (2) The thermal expansion coefficients (CTEs) of the bottom plate, the bracket, and the pressing plate are all less than 2×10^-6 / °C, and preferably invar material is selected. Utilizing the characteristics of small thermal deformation and small thermal conductivity of invar material, the influence of the deformation amounts of the three on the position offset of the to-be-tested camera module is reduced, and the temperature drift test accuracy is improved. (3) By arranging a plurality of second rubber pads in the placement groove of the bracket to support the to-be-tested camera module, the influence of the expansion of the bracket and the bottom plate during the temperature drift test on the position of the to-be-tested camera module is reduced by utilizing the elastic performance of the second rubber pads. (4) Both the first rubber pad and the second rubber pad are made of silicone rubber. Utilizing the outstanding high and low temperature resistance performance of silicone rubber and the characteristic of maintaining good elasticity within the temperature range of -70°C to 260°C, the temperature drift test accuracy is improved, and the aging speed of the first rubber pad and the second rubber pad is reduced. Description of the Drawings
[0018] Figure 1 Structural schematic diagram of a temperature drift test installation fixture for a camera module provided by the present utility model;
[0019] Figure 2 Exploded view of a temperature drift test installation fixture for a camera module provided by the present utility model;
[0020] Figure 3 Structural schematic diagram of a bracket provided by the present utility model;
[0021] Figure 4 Structural schematic diagram of a pressing plate provided by the present utility model.
[0022] Among them, the reference numerals in the drawings are as follows:
[0023] 1 - bottom plate;
[0024] 2 - bracket; 21 - placement groove; 22 - avoidance groove; 23 - first screw; 24 - second screw;
[0025] 3 - pressing plate; 31 - first through hole; 32 - abutting plate; 33 - abutting groove;
[0026] 4 - first rubber pad; 41 - second through hole;
[0027] 5 - second rubber pad;
[0028] 6 - camera module to be tested. Detailed implementation manners
[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "sheathed / connected", "connection", etc. 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 mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0032] Please refer to Figures 1 - 4 As shown, in this specific embodiment, a temperature drift test installation jig for a camera module includes: a bottom plate 1, a bracket 2, a pressing plate 3, and a first rubber pad 4; the lower end of the bracket 2 is fixedly connected to the bottom plate 1, and a placement groove 21 is provided at the upper end of the bracket 2 for accommodating the camera module 6 to be tested; the pressing plate 3 includes a first through hole 31, the pressing plate 3 is connected to the upper end of the bracket 2, and the first through hole 31 is aligned with the placement groove 21, and the pressing plate 3 is used to fixedly install the camera module 6 to be tested in the placement groove 21; the first rubber pad 4 includes a second through hole 41, the second through hole 41 is aligned with the placement groove 21, and the first rubber pad 4 is clamped between the bracket 2 and the pressing plate 3. The temperature drift test installation jig for the camera module fixes the camera module 6 to be tested through the placement groove 21 provided in the bracket 2 in cooperation with the pressing plate 3, ensuring convenient fixation of the camera module 6 to be tested; and the elastic first rubber pad 4 is clamped between the bracket 2 and the pressing plate 3 to prevent the pressing plate 3 from applying excessive squeezing force to the camera module 6 to be tested and damaging the camera module 6 to be tested. Moreover, during the temperature drift test, in order to prevent the influence of the expansion and contraction of the pressing plate 3 or the bracket 2, the first rubber pad 4 can also provide compensation to the camera module 6 to be tested; at the same time, through holes are provided in the pressing plate 3 and the first rubber pad 4 to avoid the camera module 6 to be tested, ensuring that light can enter the camera module 6 to be tested through the pressing plate 3 and the first rubber pad 4 in sequence, and ensuring that the camera module 6 to be tested can perform optical tests without detaching from the jig.
[0033] In one embodiment, the coefficient of thermal expansion (CTE) of the bottom plate 1, the bracket 2, and the pressing plate 3 is less than 2×10^-6 / °C. Preferably, the bottom plate 1, the bracket 2, and the pressing plate 3 are all made of invar material. By selecting that the coefficient of thermal expansion (CTE) of the bottom plate 1, the bracket 2, and the pressing plate 3 is less than 2×10^-6 / °C, and preferably utilizing the characteristics of small thermal deformation and small thermal conductivity of the invar material, the influence of the deformation amounts of the three on the position offset of the camera module 6 to be measured is reduced, and the temperature drift test accuracy is improved. It can be understood that considering that when the camera module 6 to be measured is subjected to the temperature drift test, the camera module temperature drift test fixture will also deform at high and low temperatures, and the influence of the deformation amount on the position offset of the camera module 6 to be measured will affect the temperature drift test accuracy of the camera module 6 to be measured. Therefore, in order to minimize this influence, in other words, in order to more stably fix the camera module 6 to be measured during the temperature drift test, it is necessary to limit the materials selected for the bottom plate 1, the bracket 2, and the pressing plate 3, that is, to control the coefficient of thermal expansion (CTE) of the three. Through a large number of material selections and verifications, the coefficient of thermal expansion (CTE) of the invar material is less than 2×10^-6 / °C, and it is strong and durable, with good corrosion resistance and high-temperature strength.
[0034] In one embodiment, the camera module temperature drift test installation fixture further includes a second rubber pad 5, and the second rubber pad 5 is arranged in the placement groove 21, and the second rubber pad 5 is used to support the camera module 6 to be measured.
[0035] On the basis of the above solution, there are multiple second rubber pads 5, and the multiple second rubber pads 5 are evenly distributed in the placement groove 21. By arranging multiple second rubber pads 5 in the placement groove 21 of the bracket 2 to support the camera module 6 to be measured, and utilizing the elastic performance of the second rubber pad 5, the influence of the expansion of the bracket 2 and the bottom plate 1 during the temperature drift test on the position of the camera module 6 to be measured is reduced, thereby improving the temperature drift test accuracy.
[0036] On the basis of the above solution, both the first rubber pad 4 and the second rubber pad 5 are made of silicone rubber. By utilizing the outstanding high and low temperature resistance performance of the silicone rubber material and the characteristic of maintaining good elasticity within the temperature range of -70°C to 260°C, the temperature drift test accuracy is improved, and the aging speed of the first rubber pad 4 and the second rubber pad 5 is reduced.
[0037] In one embodiment, an avoidance groove 22 communicating with the placement groove 21 is further provided at the upper end of the bracket 2, and the avoidance groove 22 is located on the periphery of the placement groove 21. It can be understood that the periphery of the placement groove 21 refers to the four sides of the placement groove 21. In this embodiment, the avoidance grooves 22 are arranged at the four corners of the placement groove 21. When the camera module 6 to be measured is placed in the placement groove 21, the avoidance grooves 22 can prevent the camera module 6 to be measured from interfering with the bracket 2, improve the product assembly efficiency, and play a protective role at the same time.
[0038] In one embodiment, the pressing plate 3 includes a butting plate 32 and a butting groove 33. The first through hole 31 is formed in the butting plate 32 and communicates with the butting groove 33. The butting plate 32 is used to abut against the camera module 6 to be tested accommodated in the placement groove 21, and a part of the camera module 6 to be tested is located in the butting groove 33. The butting plate 32 on the pressing plate 3 is used to abut against the camera module 6 to be tested. At the same time, the camera module 6 to be tested protruding from the placement groove 21 is accommodated through the butting groove 33, improving the assembly efficiency. Meanwhile, it is convenient for the pressing plate 3 to cope with camera modules 6 to be tested with different external dimensions, enhancing the usage scenarios of the jig.
[0039] In one embodiment, the installation jig for temperature drift test of the camera module further includes a first screw 23. The first screw 23 fixedly connects the pressing plate 3 and the first rubber pad 4 to the bracket 2, and the first screw 23 is made of invar material. The first screw 23 made of invar material realizes the fixed connection of the pressing plate 3, the first rubber pad 4 and the bracket 2, ensuring the connection problem. At the same time, it prevents the deformation of the first screw 23 during the temperature drift test, thereby affecting the test accuracy.
[0040] In one embodiment, the installation jig for temperature drift test of the camera module further includes a second screw 24. The second screw 24 fixedly connects the lower end of the bracket 2 to the bottom plate 1, and the second screw 24 is made of invar material. The second screw 24 made of invar material realizes the fixed connection of the bottom plate 1 and the bracket 2, ensuring the connection problem. At the same time, it prevents the deformation of the second screw 24 during the temperature drift test, thereby affecting the test accuracy.
[0041] The practical method of the installation jig for temperature drift test of the camera module of the present utility model is as follows:
[0042] First, the bracket 2 is fixedly connected to the bottom plate 1 through the second screw 24. Then, the camera module 6 to be tested is placed in the placement groove 21 at the upper end of the bracket 2, and a second rubber pad 5 is arranged between the camera module 6 to be tested and the bracket 2, that is, the second rubber pad 5 is arranged in the placement groove 21 at the same time. Next, the first screw 23 sequentially passes through the pressing plate 3 and the first rubber pad 4 and is fixed on the bracket 2, completing the fixation of the pressing plate 3 to the camera module 6 to be tested, that is, completing the installation and fixation of the camera module 6 to be tested. Finally, the installation jig for temperature drift test of the camera module is installed and fixed in the temperature drift test equipment through the bottom plate 1, and the temperature drift test is performed on the camera module 6 to be tested.
[0043] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its improved concept, makes equivalent replacements or changes, and all should be covered within the protection scope of the present utility model.
Claims
1. A camera module temperature drift test installation fixture, characterized in that: include: A bottom plate (1), a bracket (2), a pressing plate (3) and a first rubber pad (4); The lower end of the bracket (2) is fixedly connected to the bottom plate (1), and the upper end of the bracket (2) is provided with a placement groove (21), and the placement groove (21) is used to accommodate the camera module (6) to be tested; The pressing plate (3) comprises a first through hole (31), the pressing plate (3) is connected to the upper end of the bracket (2), and the first through hole (31) is directly opposite to the placement groove (21), and the pressing plate (3) is used to fix the camera module (6) to be tested in the placement groove (21); The first rubber pad (4) comprises a second through hole (41), the second through hole (41) is directly opposite to the placement groove (21), and the first rubber pad (4) is sandwiched between the bracket (2) and the pressing plate (3).
2. The camera module temperature drift test installation fixture according to claim 1, characterized in that: The coefficients of thermal expansion (CTE) of the base plate (1), the bracket (2) and the pressing plate (3) are all less than 2×10^-6 / °C.
3. The camera module temperature drift test installation fixture according to claim 2, characterized in that: The base plate (1), the bracket (2) and the pressing plate (3) are all made of Invar material.
4. The camera module temperature drift test installation fixture according to claim 1, characterized in that: The camera module temperature drift test installation fixture further comprises a second rubber pad (5), wherein the second rubber pad (5) is arranged in the placement groove (21), and the second rubber pad (5) is used to support the camera module (6) to be tested.
5. The camera module temperature drift test installation fixture according to claim 4, characterized in that: The second rubber pad (5) comprises a plurality of second rubber pads (5), and the plurality of second rubber pads (5) are evenly distributed in the placement groove (21).
6. The camera module temperature drift test installation fixture according to claim 5, characterized in that: The first rubber pad (4) and the second rubber pad (5) are both made of silicone rubber.
7. The camera module temperature drift test installation fixture according to claim 1, characterized in that: The upper end of the bracket (2) is also provided with an avoidance groove (22) which is in communication with the placement groove (21); the avoidance groove (22) is located on the peripheral side of the placement groove (21).
8. The camera module temperature drift test installation fixture according to claim 1, characterized in that: The pressing plate (3) comprises an abutment plate (32) and an abutment groove (33); the first through hole (31) is formed on the abutment plate (32) and communicates with the abutment groove (33); the abutment plate (32) is used to abut against the camera module (6) to be tested contained in the placement groove (21); and the camera module (6) to be tested is partially located in the abutment groove (33).
9. The camera module temperature drift test installation fixture according to claim 1, characterized in that: The camera module temperature drift test installation fixture also includes a first screw (23), the first screw (23) fixes the pressure plate (3) and the first rubber pad (4) to the bracket (2), and the first screw (23) is made of Invar material.
10. The camera module temperature drift test installation fixture according to claim 1, characterized in that: The camera module temperature drift test installation fixture also includes a second screw (24), the second screw (24) fixes the lower end of the bracket (2) to the base plate (1), and the second screw (24) is made of Invar material.