A circuit board testing fixture

Abstract

The utility model discloses a circuit board test fixture, including test fixture main part and support leg. Advantageous effect: the utility model is provided with electromagnet, spring, limit rod, and personnel can directly put the circuit board to be tested into the test fixture main part top position, then according to the position difference of the hole used for installing on the circuit board surface to control the electromagnet of corresponding position to stop power supply, at this moment, the electromagnet will lose magnetism due to power failure, and then make the spring deformation reset and move up along the guide hole, at this moment, the limit rod can be inserted into the hole on the circuit board surface, and then through the insertion of multiple sets of limit rods, the limit fixing operation to the circuit board can be realized, and since the limit rod can move up and down and the circuit board is directly placed on the top position of the test fixture main part, after the subsequent test is completed, only need to clamp the limit rod to re-adsorb and move down, and the circuit board can be smoothly and quickly taken away, and has the advantage that the loading and unloading are labor-saving.

Description

Technical Field

[0001] This utility model relates to the field of test fixture technology, and more specifically, to a circuit board test fixture. Background Technology

[0002] A printed circuit board (PCB) is a conductive pattern, consisting of printed lines, printed components, or a combination of both, fabricated on insulating material according to a predetermined design. PCB testing requires PCB test fixtures. Existing PCB test fixtures are used by placing the PCB on the fixture and then controlling the test probe holder to descend until the test probe contacts the PCB to perform the test.

[0003] Currently, the circuit board under test (PCB) needs to be precisely placed in the placement slot of the test fixture before testing. After testing, it is inconvenient to remove it from the narrow placement slot due to limited operating space. Furthermore, when the placement slot on the test table does not match the PCB well, any misalignment of the PCB in the placement slot will affect the accuracy of the test probes in aligning with the test points, thus affecting the overall test results. At the same time, the fixed structural dimensions also limit the types of PCBs that can be applied, thereby reducing the overall applicability and greatly reducing the practicality of the device, which is not conducive to better use. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a circuit board testing fixture that has the advantages of wide applicability, labor-saving loading and unloading, and strong practicality, thereby solving the problems mentioned in the background technology.

[0005] (II) Technical Solution To achieve the advantages of wide applicability, labor-saving loading and unloading, and strong practicality, the specific technical solution adopted by this utility model is as follows: A circuit board testing fixture includes a main body and support legs. An adjustment groove is provided at the top of the main body. Several sets of electromagnets are evenly installed at the bottom of the adjustment groove. A guide hole is provided on the surface of the main body directly above the electromagnets. A limit rod is slidably connected inside the guide hole. An adsorption plate is welded to the bottom of the limit rod. A spring is sleeved on the outer periphery of the limit rod, and the two ends of the spring are fixed to the surface of the adsorption plate and the top of the adjustment groove, respectively.

[0006] Furthermore, the test fixture body has symmetrical drive slots on both sides of its top. A slide rod and a longitudinal lead screw are installed inside each drive slot. One end of the longitudinal lead screw passes through one side of the drive slot and connects to a second motor. Support arms are sleeved around the outer periphery of both the slide rod and the longitudinal lead screw. A guide rod is installed in the middle of the support arm. A drive arm is slidably connected between the guide rods. A transverse lead screw is installed in the middle of the drive arm. One end of the transverse lead screw is connected to the output end of a first motor, which is located inside the drive arm. A movable seat is sleeved around the transverse lead screw, and a test probe holder is installed at the bottom of the movable seat.

[0007] Furthermore, a top plate is welded to the top of the support arm, and an electric push rod is installed at the bottom center of the top plate, with one end of the electric push rod connected to the drive arm.

[0008] Furthermore, a controller is installed on one side surface of the test fixture body.

[0009] Furthermore, support legs are symmetrically installed on both sides of the bottom of the main body of the test fixture.

[0010] Furthermore, the size of the limiting rod is the same as the size of the mounting hole on the circuit board surface.

[0011] Furthermore, the size of the adsorption plate is larger than the size of the guide hole.

[0012] Furthermore, the adsorption plate is made of metal.

[0013] (III) Beneficial Effects Compared with the prior art, the present invention provides a circuit board testing fixture, which has the following beneficial effects: (1) This utility model is equipped with an electromagnet, a spring, and a limiting rod. Personnel can directly place the circuit board to be tested into the top position of the test fixture body. Then, according to the different positions of the holes on the surface of the circuit board for installation, the electromagnet at the corresponding position is controlled to stop supplying power. At this time, the electromagnet will lose its magnetism due to the power failure, which will cause the spring to deform and reset, moving the limiting rod upward along the guide hole. At this time, the limiting rod can be inserted into the hole on the surface of the circuit board. By inserting multiple sets of limiting rods, the circuit board can be fixed in a limited position. Since the limiting rod can move up and down and the circuit board is placed directly on the top position of the test fixture body, after the subsequent test is completed, it is only necessary to clamp the limiting rod and re-adsorb and move it down to remove the circuit board smoothly and quickly. It has the advantage of saving effort in loading and unloading.

[0014] (2) This utility model is equipped with a horizontal lead screw, a vertical lead screw, a first motor, and a second motor. After the circuit board is installed, the operation of the first motor can drive the test probe holder to move horizontally left and right along the horizontal lead screw, and the operation of the second motor can drive the support arm to move longitudinally back and forth along the vertical lead screw. The two are used together to drive the test probe holder to move arbitrarily left, right, and forward, so that the test probe holder can cover different positions of circuit boards of different sizes, thereby expanding the overall testing range and the applicable types of the device, making it easier to use and improving the overall practicality. It has the advantages of wide applicability and strong practicality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a circuit board testing fixture according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the support arm of a circuit board testing fixture according to an embodiment of the present utility model; Figure 3 This is a schematic diagram showing the connection between the limiting rod and the spring of a circuit board testing fixture according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the guide hole structure of a circuit board testing fixture according to an embodiment of the present utility model.

[0017] In the picture: 1. Test fixture body; 2. Adjustment groove; 3. Electromagnet; 4. Adsorption plate; 5. Spring; 6. Limiting rod; 7. Guide hole; 8. Drive groove; 9. Slide rod; 10. Support arm; 11. Guide rod; 12. First motor; 13. Drive arm; 14. Transverse lead screw; 15. Top plate; 16. Electric push rod; 17. Moving seat; 18. Test pin holder; 19. Longitudinal lead screw; 20. Controller; 21. Support leg; 22. Second motor. Detailed Implementation

[0018] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0019] According to an embodiment of the present invention, a circuit board testing fixture is provided.

[0020] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4 As shown, a circuit board testing fixture according to an embodiment of the present invention includes a testing fixture body 1 and a support leg 21. An adjustment groove 2 is provided at the top of the interior of the testing fixture body 1. Several sets of electromagnets 3 are evenly installed at the bottom of the interior of the adjustment groove 2. A guide hole 7 is provided on the surface of the testing fixture body 1 directly above the electromagnets 3. A limit rod 6 is slidably connected inside the guide hole 7. An adsorption plate 4 is welded to the bottom of the limit rod 6. A spring 5 is sleeved on the outer periphery of the limit rod 6, and the two ends of the spring 5 are fixed to the surface of the adsorption plate 4 and the top of the interior of the adjustment groove 2, respectively.

[0021] In one embodiment, drive slots 8 are symmetrically provided on both sides of the top of the test fixture body 1. A slide rod 9 and a longitudinal lead screw 19 are respectively installed inside the drive slots 8. One end of the longitudinal lead screw 19 passes through one side of the drive slot 8 and is connected to the second motor 22. Support arms 10 are sleeved on the outer periphery of both the slide rod 9 and the longitudinal lead screw 19. A guide rod 11 is installed in the middle of the support arm 10. A drive arm 13 is slidably connected between the guide rods 11. A transverse lead screw 14 is installed in the middle of the drive arm 13. One end of the transverse lead screw 14 is connected to the output end of the first motor 12. The first motor 12 is located inside the drive arm 13. A movable seat 17 is sleeved on the outer periphery of the transverse lead screw 14. A test needle seat 18 is installed at the bottom of the movable seat 17. The transverse lead screw 14 and the longitudinal lead screw 19 are common lead screws. The main difference here is in their installation positions, which does not affect the normal use of the structure.

[0022] In one embodiment, a top plate 15 is welded to the top of the support arm 10, and an electric push rod 16 is installed at the bottom center of the top plate 15. One end of the electric push rod 16 is connected to the drive arm 13. The electric push rod 16 is designed to move the support arm 10 so that the test pins on the test pin holder 18 on its surface can make smooth contact with the circuit board surface, thereby realizing the test operation of the circuit board.

[0023] In one embodiment, a controller 20 is installed on one side surface of the test fixture body 1. The controller 20 is set up to control multiple sets of electromagnets 3, multiple sets of motors and electric push rods 16. Since the controller 20 is of various types and the application technology is mature, personnel can select it according to their needs and implement it through programming. It will not be elaborated on here.

[0024] In one embodiment, support legs 21 are symmetrically installed on both sides of the bottom of the test fixture body 1. The support legs 21 can fix the entire device, thereby enhancing the overall stability of use.

[0025] In one embodiment, the size of the limiting rod 6 is the same as the size of the mounting hole on the surface of the circuit board. The size of the limiting rod 6 is set to ensure that it can be smoothly inserted into the hole on the surface of the circuit board for later fixation, thereby fixing the circuit board and ensuring that it will not move during testing, thus ensuring test accuracy and stability.

[0026] In one embodiment, the size of the adsorption plate 4 is larger than the size of the guide hole 7. The size of the adsorption plate 4 is set to ensure that it is blocked by the guide hole 7 when it moves to the top, thereby preventing it from detaching from the guide hole 7 and ensuring the effectiveness of the limiting rod 6 and the stability of its movement.

[0027] In one embodiment, the adsorption plate 4 is made of metal. The adsorption plate 4 is designed to drive the spring 5 to deform by being attracted and released by the electromagnet 3, thereby realizing the up and down movement of the limit rod 6, thus achieving the limitation and fixation of the circuit board and its release. Therefore, the adsorption plate 4 needs to be made of a material that can be attracted by the electromagnet 3, such as iron.

[0028] Working Principle: In actual use, the operator can directly place the circuit board to be tested onto the top of the test fixture body 1. Then, according to the different positions of the holes on the surface of the circuit board, the corresponding electromagnet 3 is de-energized. At this time, the electromagnet 3 loses its magnetism due to the power failure, causing the spring 5 to deform and reset, moving the limiting rod 6 upward along the guide hole 7. The limiting rod 6 can then be inserted into the hole on the surface of the circuit board. By inserting multiple sets of limiting rods 6, the circuit board can be limited and fixed, ensuring the stability of subsequent tests. This ensures that the test pin holder 18 can accurately contact the surface of the circuit board, thereby ensuring test accuracy and test results. Furthermore, since the limiting rod 6 can move up and down and the circuit board is placed directly on the top of the test fixture body 1, subsequent tests... After the test is completed, the circuit board can be easily and quickly removed by simply clamping the limiting rod 6 and re-attaching it. This facilitates subsequent circuit board installation and testing. After the circuit board is installed, the first motor 12 can drive the test probe holder 18 to move laterally along the horizontal lead screw 14, and the second motor 22 can drive the support arm 10 to move longitudinally along the vertical lead screw 19. The two motors working together can drive the test probe holder 18 to move arbitrarily in all directions, allowing it to cover different positions on circuit boards of different sizes. This expands the overall testing range and the applicability of the device, making it easier to use and improving its overall practicality. The device has the advantages of wide applicability, labor-saving loading and unloading, and strong practicality.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A circuit board testing fixture, comprising a main body (1) and support legs (21), characterized in that, An adjustment groove (2) is provided at the top of the test fixture body (1). Several sets of electromagnets (3) are evenly installed at the bottom of the adjustment groove (2). A guide hole (7) is provided on the surface of the test fixture body (1) directly above the electromagnet (3). A limit rod (6) is slidably connected inside the guide hole (7). An adsorption plate (4) is welded to the bottom of the limit rod (6). A spring (5) is sleeved on the outer periphery of the limit rod (6), and the two ends of the spring (5) are fixed to the surface of the adsorption plate (4) and the top of the adjustment groove (2) respectively.

2. The circuit board testing fixture according to claim 1, characterized in that, The test fixture body (1) has symmetrical drive slots (8) on both sides of the top. A slide rod (9) and a longitudinal screw rod (19) are installed inside the drive slots (8). One end of the longitudinal screw rod (19) passes through one side of the drive slot (8) and is connected to the second motor (22). Support arms (10) are sleeved on the outer periphery of the slide rod (9) and the outer periphery of the longitudinal screw rod (19). A guide rod (11) is installed in the middle of the support arm (10). A drive arm (13) is slidably connected between the guide rods (11). A transverse screw rod (14) is installed in the middle of the drive arm (13). One end of the transverse screw rod (14) is connected to the output end of the first motor (12). The first motor (12) is located inside the drive arm (13). A movable seat (17) is sleeved on the outer periphery of the transverse screw rod (14). A test needle seat (18) is installed at the bottom of the movable seat (17).

3. A circuit board testing fixture according to claim 2, characterized in that, A top plate (15) is welded to the top of the support arm (10), and an electric push rod (16) is installed at the middle of the bottom of the top plate (15). One end of the electric push rod (16) is connected to the drive arm (13).

4. A circuit board testing fixture according to claim 1, characterized in that, A controller (20) is installed on one side surface of the test fixture body (1).

5. A circuit board testing fixture according to claim 1, characterized in that, The test fixture body (1) has legs (21) symmetrically installed on both sides of its bottom.

6. A circuit board testing fixture according to claim 1, characterized in that, The size of the limiting rod (6) is the same as the size of the mounting hole on the circuit board surface.

7. A circuit board testing fixture according to claim 1, characterized in that, The size of the adsorption plate (4) is larger than the size of the guide hole (7).

8. A circuit board testing fixture according to claim 1, characterized in that, The adsorption plate (4) is made of metal.

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