Light shield for testing photosensitive tube

Abstract

The utility model relates to a light shield for testing a photosensitive tube, and relates to the technical field of photosensitive tube testing, and the light shield comprises a test box, a cabinet door is rotatably installed on the test box, a test bench is slidably installed on the test box, a positioning assembly is arranged on the test bench, and the positioning assembly is used for positioning the test bench. A clamping assembly is arranged on the test bench, and the clamping assembly is used for clamping a photosensitive tube; a light-emitting part is arranged on the test table, the light-emitting part is installed in the test box, a shading film is arranged in the test box, and the shading film is laid on the inner side of the test box. The test result deviation caused by the fact that the photosensitive tube cannot align to the light-emitting part is reduced, the accuracy of the test result is improved, and the normal progress of consistency inspection is guaranteed.

Description

Technical Field

[0001] This application relates to the field of phototube testing technology, and in particular to a light shield for phototube testing. Background Technology

[0002] A phototube is an electronic component that changes its resistance or current in response to variations in light intensity. It is typically made of photosensitive materials (such as selenium or cadmium sulfide). When light shines on the surface of the phototube, the photosensitive material undergoes a photoelectric effect, causing a change in the material's conductivity, thereby altering the phototube's current or resistance. Phototubes are widely used in automatic control, photoelectric detection, and signal conversion.

[0003] When testing the electrical parameters of photosensitive BT products, the product needs to be shielded from light to test the dark current and photocurrent in order to verify whether the product's electrical parameters meet the detailed specifications.

[0004] The current testing method is to use a cardboard box to shield the product from light to test the dark current, and to use a light bulb to illuminate the product to test the photocurrent.

[0005] Because the cardboard boxes cannot be matched with the test fixtures, and the light bulbs sometimes cannot be aligned with the test fixtures, problems such as deviations in test results often occur, affecting the test results and thus affecting the normal progress of consistency inspection. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a light shield for testing phototubes, which solves the technical problem that the test results will be deviated because the light bulb cannot be aligned with the test fixture.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A light shield for testing photosensitive tubes includes a test chamber with a rotatable door and a test platform slidably mounted on it. A positioning component is provided on the test platform for positioning the platform, and a clamping component is also provided to clamp the photosensitive tube. A light-emitting element is provided on the test platform and installed inside the test chamber. A light-shielding film is provided inside the test chamber and laid on its inner side.

[0009] Furthermore, the test chamber is equipped with a slide rail, and the test platform is equipped with a slider, which is slidably mounted on the slide rail.

[0010] Furthermore, the positioning component includes a positioning block, a support spring is connected to the test platform, one end of the support spring is connected to the test platform, and the other end is connected to the positioning block. A positioning hole is provided on the slide rail, and the positioning block is inserted into the positioning hole.

[0011] Furthermore, a connecting block is provided inside the test box, a first conductive sheet is formed on the connecting block, a wire is provided on the connecting block and the wire is connected to the first conductive sheet, and a second conductive sheet is provided on the test platform, the second conductive sheet being spaced apart from the first conductive sheet.

[0012] Furthermore, the test platform is provided with slots, and a number of slots are spaced apart on the test platform. Clamping plates are provided in the slots, and the clamping plates are arranged opposite to each other. Clamping springs are provided between the clamping plates and the test platform, and the clamping springs are respectively connected to the clamping plates and the test platform.

[0013] Furthermore, the test box is provided with a connecting cylinder, which corresponds to the test platform, and one end of the connecting cylinder is inserted into the test box, with the light-emitting element threadedly connected to the side of the connecting cylinder that is inserted into the test box.

[0014] Furthermore, a connecting plate is provided on the cabinet door, and a connecting groove is opened on the connecting plate. A connecting rod is rotatably installed on the test box, and the connecting rod is embedded in the connecting groove. A positioning plate is provided at one end of the connecting rod, and a pressure plate is provided on one side of the positioning plate. The pressure plate abuts against the connecting plate, and a compression spring is provided between the pressure plate and the positioning plate. The compression spring is connected to the positioning plate and the pressure plate respectively.

[0015] In summary, this application includes at least one of the following beneficial technical effects of a light shield for phototube testing:

[0016] 1. Before use, place the phototube on the test stage. The clamping components on the test stage will clamp the phototube. Then close the cabinet door and use the light-blocking film to block external light. When using, turn on the light-emitting element and test the photocurrent of the phototube. Turn off the light-emitting element and test the dark current of the phototube. This will ensure that the phototube is aligned with the light-emitting element, reduce test result deviations caused by the phototube not being aligned with the light-emitting element, improve the accuracy of test results, and ensure the normal progress of consistency inspection.

[0017] 2. By using the slide rail and slider, as well as the first conductive sheet on the connecting block and the second conductive sheet on the test stage, the ease of mounting the phototube on the test stage is improved;

[0018] 3. By using the positioning block and positioning hole to engage and the connecting cylinder to ensure that the photosensitive tube is aligned with the light-emitting element, the accuracy of the test is improved. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a light shield for testing a phototube, which is the main feature of this application.

[0020] Figure 2 This is a schematic diagram of the test box structure mainly provided in this application;

[0021] Figure 3 This is a schematic diagram of the test bench structure mainly provided in this application;

[0022] Figure 4 This is a schematic diagram of the main connecting block and test bench structure provided in this application;

[0023] Figure 5 This is a schematic diagram of the main connecting block structure provided in this application.

[0024] Reference numerals: 1. Test box; 11. Cabinet door; 111. Connecting plate; 112. Connecting groove; 12. Light-emitting element; 13. Light-shielding film; 14. Connecting block; 141. First conductive sheet; 142. Wire; 15. Support plate; 151. Buffer spring; 16. Connecting cylinder; 17. Connecting rod; 171. Positioning plate; 172. Pressure plate; 173. Compression spring; 2. Test platform; 21. Slider; 22. Second conductive sheet; 23. Slot; 3. Positioning assembly; 31. Slide rail; 32. Positioning block; 33. Supporting spring; 34. Positioning hole; 4. Clamping assembly; 41. Clamping plate; 42. Clamping spring. Detailed Implementation

[0025] In order to make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0027] This application discloses a light shield for testing phototubes.

[0028] Reference Figure 1 A light shield for testing a phototube includes a test chamber 1 with a rotatable door 11. A test platform 2 is installed inside the test chamber 1, and the phototube is mounted on the test platform 2. The test platform 2 is equipped with a positioning component 3 and a clamping component 4. The positioning component 3 positions the test platform 2, and the clamping component 4 clamps the phototube, ensuring that the phototube remains in the same position within the test chamber 1 during each test. Furthermore, the test chamber 1 contains a light-emitting element 12 and a light-shielding film 13. The light-emitting element 12 is used to test the photocurrent of the phototube, and when the light-emitting element 12 is turned off, the dark current of the phototube is tested.

[0029] Reference Figures 2-3 The test chamber 1 is equipped with slide rails 31 arranged opposite each other. The test platform 2 is located between the two slide rails 31. In addition, sliders 21 are formed on both sides of the test platform 2 near the slide rails 31. The test platform 2 slides on the slide rails 31 via the sliders 21. When it is necessary to place the photosensitive tube onto the test platform 2, the test platform 2 is pulled out of the test chamber 1 along the slide rails 31. After the photosensitive tube is placed, the test platform 2 is pushed back into the test chamber 1.

[0030] Reference Figures 4-5 Furthermore, a connecting block 14 is provided inside the test chamber 1. A first conductive sheet 141 is provided on the connecting block 14, and a wire 142 is connected to the connecting block 14. One end of the wire 142 is connected to the first conductive sheet 141, and the other end extends out of the test chamber 1 to connect to an external testing device. A second conductive sheet 22 is provided on the test platform 2. When the test platform 2 is pushed into the test chamber 1, the second conductive sheet 22 on the test platform 2 comes into contact with the first conductive sheet 141 on the connecting block 14, so that the first conductive sheet 141 and the second conductive sheet 22 make contact and form an electrical connection. When the phototube is inserted into the test platform 2, the convenience of the external testing device to detect the photocurrent and dark current of the phototube is improved.

[0031] In order to improve the accuracy of external detection equipment in detecting the photocurrent and dark current of the phototube, the light-shielding film 13 is made of black opaque film. When in use, the light-shielding film 13 can effectively block light.

[0032] Reference Figure 3 To improve the stability of the test platform 2 during testing, the positioning component 3 includes a positioning block 32 and a support spring 33. A set of positioning blocks 32 and support springs 33 are provided on each side of the test platform 2 near the slide rail 31. One end of the support spring 33 is connected to the corresponding positioning block 32, and the other end is connected to the test platform 2. In addition, a positioning hole 34 is provided on the slide rail 31. During the sliding process of the test platform 2, when the positioning block 32 corresponds to the positioning hole 34, the support spring 33 presses the positioning block 32 against the positioning hole 34, thereby improving the stability of the position of the test platform 2 during testing.

[0033] Furthermore, a support plate 15 and a buffer spring 151 are provided on the side of the connecting block 14 near the test platform 2. The support plate 15 and the test platform 2 are spaced apart, and the two ends of the buffer spring 151 are connected to the support plate 15 and the buffer spring 151, respectively. When the test platform 2 moves towards the side near the connecting block 14, the buffer spring 151 is compressed. When the second conductive plate 22 on the test platform 2 contacts the first conductive plate 141 on the connecting block 14, the support plate 15 and the buffer spring 151 retract into the connecting block 14, thereby reducing the impact of the test platform 2 on the connecting block 14 when the test platform 2 is pushed into the test chamber 1.

[0034] The test stand 2 has slots 23, which are spaced apart. When the phototube is inserted into the slot 23 of the test stand 2, the phototube is connected to the second conductive sheet 22 on the test stand 2, so that external testing equipment can test the phototube.

[0035] Reference Figure 3 To improve the stability of the phototube on the test stage 2, the clamping assembly 4 includes clamping plates 41. The clamping plates 41 are arranged opposite each other in corresponding slots 23. A clamping spring 42 is provided between the two opposing clamping plates 41 and the test stage 2. One end of the clamping spring 42 is connected to the clamping plate 41, and the other end is connected to the test stage 2. In use, the phototube is inserted between the two clamping plates 41, and the clamping plates 41 lower and clamp the phototube under the action of the clamping spring 42.

[0036] The light-emitting element 12 is a device capable of emitting a light source. Preferably, the light-emitting element 12 in this application is an LED lamp. In order to improve the accuracy of the position of the light-emitting element 12 in the test chamber 1, a connecting cylinder 16 is provided on the test chamber 1. The connecting cylinder 16 corresponds to the test platform 2, and one end of the connecting cylinder 16 is inserted into the test chamber 1. In use, the LED lamp is threaded into the connecting cylinder 16. During the test, the LED lamp illuminates the photosensitive tube.

[0037] Reference Figures 1-2Furthermore, a connecting plate 111 is provided on the cabinet door 11, and a connecting groove 112 is opened on the connecting plate 111, with one side of the connecting groove 112 being open. A connecting rod 17 is rotatably connected to the test box 1, and the connecting rod 17 is embedded in the connecting groove 112 of the connecting plate 111. In order for the cabinet door 11 to close on the cabinet body, a positioning plate 171 is provided on the connecting rod 17. The positioning plate 171 is generally circular and is installed on the connecting rod 17. A pressure plate 172 is provided on the connecting rod 17, and the pressure plate 172 and the positioning plate 171 are spaced apart. In addition, a compression spring 173 is provided between the positioning plate 171 and the pressure plate 172, and the two ends of the compression spring 173 are respectively connected to the positioning plate 171 and the pressure plate 172. In use, rotate the cabinet door 11 towards the test chamber 1. When it is necessary to close the cabinet door 11 onto the test chamber 1, pull the pressure plate 172 towards the positioning plate 171. At this time, the compression spring 173 is compressed, and the connecting rod 17 rotates towards the cabinet door 11, embedding the connecting rod 17 into the connecting groove 112 of the connecting plate 111. Release the pressure plate 172, which is now pressed against the connecting plate 111 by the compression spring 173, thus preventing the cabinet door 11 from being opened during the test.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A light shield for testing phototubes, comprising a test chamber (1), wherein a cabinet door (11) is rotatably mounted on the test chamber (1), characterized in that: A test platform (2) is slidably mounted on the test box (1). A positioning component (3) is provided on the test platform (2) for positioning the test platform (2). A clamping component (4) is provided on the test platform (2) for clamping the photosensitive tube. A light-emitting element (12) is provided on the test platform (2) and is installed inside the test box (1). A light-shielding film (13) is provided inside the test box (1) and is laid on the inner side of the test box (1).

2. The light shield for testing a phototube according to claim 1, characterized in that: The test box (1) is equipped with a slide rail (31), and the test platform (2) is equipped with a slider (21), which is slidably mounted on the slide rail (31).

3. A light shield for testing a phototube according to claim 2, characterized in that: The positioning component (3) includes a positioning block (32), and a support spring (33) is connected to the test platform (2). One end of the support spring (33) is connected to the test platform (2), and the other end is connected to the positioning block (32). A positioning hole (34) is provided on the slide rail (31), and the positioning block (32) is inserted into the positioning hole (34).

4. A light shield for testing a phototube according to claim 1, characterized in that: The test box (1) is provided with a connecting block (14), a first conductive sheet (141) is formed on the connecting block (14), a wire (142) is provided on the connecting block (14), the wire (142) is connected to the first conductive sheet (141), and a second conductive sheet (22) is provided on the test platform (2), the second conductive sheet (22) and the first conductive sheet (141) are spaced apart.

5. A light shield for testing a phototube according to claim 1, characterized in that: The test bench (2) has slots (23) provided. Several slots (23) are spaced apart on the test bench (2). Clamping plates (41) are provided in several slots (23). The clamping plates (41) are arranged opposite to each other. A clamping spring (42) is provided between the clamping plate (41) and the test bench (2). The clamping spring (42) is connected to the clamping plate (41) and the test bench (2) respectively.

6. A light shield for testing a phototube according to claim 1, characterized in that: The test box (1) is provided with a connecting tube (16), which corresponds to the test platform (2), and one end of the connecting tube (16) is inserted into the test box (1). The light-emitting element (12) is threadedly connected to the side of the connecting tube (16) that is inserted into the test box (1).

7. A light shield for testing a phototube according to claim 1, characterized in that: A connecting plate (111) is provided on the cabinet door (11), and a connecting groove (112) is provided on the connecting plate (111). A connecting rod (17) is rotatably installed on the test box (1). The connecting rod (17) is embedded in the connecting groove (112). A positioning plate (171) is provided at one end of the connecting rod (17). A pressure plate (172) is provided on one side of the positioning plate (171). The pressure plate (172) abuts against the connecting plate (111). A compression spring (173) is provided between the pressure plate (172) and the positioning plate (171). The compression spring (173) is connected to the positioning plate (171) and the pressure plate (172) respectively.

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