Test fixture

Abstract

The utility model relates to the field of clamps, in particular to a test clamp, which comprises a test board, a plurality of switches fixedly mounted on the upper surface of the test board, a connector b and a connector c fixedly mounted on the upper surface of the test board close to the edge of one side, and a connector a fixedly mounted on one side of the connector b, and further comprises a plurality of mounting blocks fixedly mounted on two sides of the switches, and a plurality of insertion holes communicating with the mounting groove are symmetrically formed in the upper surface of the mounting block. According to the test fixture, clamping blocks are symmetrically installed in a mounting groove in a sliding mode, a plurality of connecting grooves are formed in the side wall of the mounting block in a penetrating mode, push rods are installed in the connecting grooves in a sliding mode, the push rods are of triangular prism structures, the clamping blocks are of trapezoidal structures, and the inclined faces of the push rods are always tightly attached to the inclined faces of the clamping blocks; and the bevel angle of the push rod extrudes the bevel angle of the clamping block, so that the clamping block moves towards the insertion hole to fix the line inserted into the insertion hole, and rapid fixation of lines of different sizes is realized.

Description

Technical Field

[0001] This utility model relates to the field of fixtures, and more particularly to test fixtures. Background Technology

[0002] Fixtures are essential auxiliary tools in machining, assembly, and testing processes. By fixing the workpiece in place, fixtures maintain its accurate geometric relationship with the machine tool or workpiece, avoiding errors caused by manual adjustments. Even for inexperienced operators, fixtures ensure correct workpiece clamping, reducing human error. Test fixtures are specialized auxiliary tools used in product testing. Their core function is to ensure the accuracy, efficiency, and consistency of testing, and they are widely used in industries such as electronics, automotive, aerospace, and semiconductors. In dual-pulse testing, it is necessary to test the parameters of different bridge arms of multi-unit modules. For multi-unit modules, this requires continuous disassembly and reassembly of the test board for testing, which is complex, inefficient, and prone to errors.

[0003] Chinese Patent CN221686460U discloses a PCB test fixture that uses an inverted inner board to quickly detach the PCB from the mounting slot, achieving the effect of installing and testing multiple PCBs. However, when changing test circuits, the clamping procedure for circuit replacement is complicated. Therefore, this test fixture is provided. Utility Model Content

[0004] The main purpose of this utility model is to provide a test fixture to solve the problem in related technologies where the clamping procedure for changing test circuits is complicated.

[0005] To achieve the above objectives, according to one aspect of the present invention, a test fixture is provided, comprising a test plate, wherein a plurality of switches are fixedly mounted on the upper surface of the test plate, and connectors b and c are fixedly mounted near one edge of the upper surface of the test plate, and connector a is fixedly mounted on one side of connector b. The fixture further comprises: mounting blocks, wherein a plurality of mounting blocks are fixedly mounted on both sides of the switches, mounting blocks have mounting grooves formed within them, and a plurality of insertion holes communicating with the mounting grooves are symmetrically formed on the upper surface of the mounting blocks. Clamping blocks are symmetrically slidably mounted within the mounting grooves, and connecting grooves are formed through the side walls at both ends of the mounting blocks. Push rods are slidably mounted within the connecting grooves, and when the push rods move downward along the connecting grooves, the push rods push the clamping blocks to fix the wires inserted into the insertion holes.

[0006] Furthermore, a gasket is fixedly installed on the side wall of connector a near the lower edge. The gasket is made of flexible material. Connectors a, b, and c have the same structure.

[0007] Furthermore, the upper and lower sidewalls of the mounting groove are symmetrically provided with several slide rail grooves, and the upper and lower surfaces of the clamping block are symmetrically fixedly installed with limiting blocks a. The limiting blocks a are snapped into the slide rail grooves, and the limiting blocks a are T-shaped structures adapted to the slide rail grooves.

[0008] Furthermore, one side of the clamping block has an oblique angle that slopes downward toward the connecting groove, and the other side of the clamping block has several clamping grooves, which are arc-shaped.

[0009] Furthermore, a spring is fixedly installed on the side wall of the slide rail near the insertion hole, and the other end of the spring is fixedly installed on the side of the limit block a.

[0010] Furthermore, limit blocks b are symmetrically fixedly installed on both sides of the push rod. The limit blocks b are slidably engaged in the connecting groove. The push rod has a triangular prism structure, and the clamping block has a trapezoidal structure. The inclined surface of the push rod and the inclined side of the clamping block are always in close contact.

[0011] Furthermore, several locking blocks are symmetrically fixedly installed on the side wall of the connecting groove. The upper surface of the locking blocks is provided with an oblique angle that slopes downward toward the center of the connecting groove. The locking blocks are made of flexible material.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This test fixture includes a mounting block with a mounting groove inside. Several symmetrical insertion holes communicating with the mounting groove are formed on the upper surface of the mounting block. A clamping block is symmetrically slidably mounted within the mounting groove. Several connecting grooves are formed through the side wall of the mounting block, and a push rod is slidably mounted within each connecting groove. One side of the clamping block has a downward-sloping angle towards the connecting groove. The push rod has a triangular prism structure, and the clamping block has a trapezoidal structure. The inclined surface of the push rod and the inclined side of the clamping block are always in close contact. When the push rod is pushed downwards, the inclined angle of the push rod presses against the inclined angle of the clamping block, causing the clamping block to move towards the insertion hole to fix the wire inserted into the insertion hole, thus achieving rapid fixing of wires of different sizes.

[0014] 2. This test fixture is equipped with clamping blocks, which are symmetrically fixedly installed on the side wall of the connecting groove. The upper surface of the clamping blocks has an angled opening that slopes downward toward the center of the connecting groove. The clamping blocks are made of flexible material. When the push rod is pushed downward, the position of the push rod is fixed at the plane of the lower surface of the clamping block to fix the position of the clamping block. When the push rod is moved upward, the push rod can be moved upward by force. The spring returns to its original position to push the clamping block to move to both sides of the mounting groove so as to facilitate the removal of the inserted wire. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the test board structure in a preferred embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the mounting block structure in a preferred embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure at point A in a preferred embodiment of the present invention;

[0018] Figure 4 This is a cross-sectional view of the mounting block in a preferred embodiment of the present invention;

[0019] Figure 5 This is a cross-sectional view of the mounting groove in a preferred embodiment of the present invention;

[0020] Figure 6 This is a schematic cross-sectional view of the slide rail groove in a preferred embodiment of the present invention;

[0021] Figure 7 This is a schematic diagram of the clamping block structure in a preferred embodiment of the present invention;

[0022] Figure 8 This is a schematic diagram of the push rod structure in a preferred embodiment of the present invention;

[0023] Figure 9 This is a cross-sectional view of the clamping block in a preferred embodiment of the present invention.

[0024] Figure label:

[0025] 1. Test board; 11. Connector a; 12. Connector b; 13. Connector c; 14. Switch; 111. Gasket;

[0026] 2. Mounting block; 21. Mounting slot; 22. Insertion hole; 23. Slide rail slot; 24. Connecting slot; 241. Locking block;

[0027] 3. Clamping block; 31. Clamping groove; 32. Limiting block a; 33. Push rod; 321. Spring; 331. Limiting block b. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0029] This embodiment provides a test fixture, including a test plate 1. Several switches 14 are fixedly installed on the upper surface of the test plate 1. A connector b12 and a connector c13 are fixedly installed on one side of the upper surface of the test plate 1. A connector a11 is fixedly installed on one side of the connector b12. The fixture also includes a mounting block 2. Several mounting blocks 2 are fixedly installed on both sides of the switches 14. The mounting block 2 has a mounting groove 21. Several insertion holes 22 communicating with the mounting groove 21 are symmetrically opened on the upper surface of the mounting block 2. Clamping blocks 3 are symmetrically slidably installed in the mounting groove 21. Connecting grooves 24 are opened through the side walls at both ends of the mounting block 2. Push rods 33 are slidably installed in the connecting grooves 24. When the push rods 33 move downward along the connecting grooves 24, the push rods 33 push the clamping blocks 3 to fix the wires inserted into the insertion holes 22. The push rods 33 pass through the connecting grooves 24 at both ends of the mounting block 2.

[0030] like Figure 1 As shown, a gasket 111 is fixedly installed on the side wall of connector a11 near the lower edge. The gasket 111 is made of flexible material. Connectors a11, b12, and c13 have the same structure. The gasket 111 prevents damage to the test board 1 during connection. When testing the upper bridge arm, the inductor connectors are connected to connectors a11 and c13 respectively. The drive signal terminal is inserted into the mounting block 2 above the test board 1. The mounting block 2 below the test board 1 is shorted with a short connector. The leftmost switch 14 is moved to the left, and the other switches 14 are moved to the right to test the U-phase upper bridge. The leftmost switch 14 is moved to the left, and the other switches 14 are moved to the right to test the V-phase upper bridge. The leftmost switch 14 is moved to the left, and the other switches 14 are moved to the right to test the V-phase upper bridge. Move switch 14 to the left and the remaining switches 14 to the right to test the upper bridge of phase W. When testing the lower bridge arm, connect the inductor connectors to connectors a11 and b12 respectively. Insert the drive signal terminal into the mounting block 2 below test board 1. Short-circuit the mounting block 2 above test board 1 with a short connector. Move the leftmost switch 14 to the left and the remaining switches 14 to the right to test the lower bridge of phase U. Move the leftmost switch 14 to the left and the remaining switches 14 to the right to test the lower bridge of phase V. Move the leftmost switch 14 to the left and the remaining switches 14 to the right to test the lower bridge of phase W. Move the leftmost switch 14 to the left and the remaining switches 14 to the right to test the lower bridge of phase B.

[0031] like Figure 5 , Figure 6 As shown, the mounting groove 21 has several slide rail grooves 23 symmetrically opened on its upper and lower side walls. The clamping block 3 has limit blocks a32 symmetrically fixedly installed on its upper and lower surfaces. The limit blocks a32 are snapped into the slide rail grooves 23. The limit blocks a32 are T-shaped structures that are adapted to the slide rail grooves 23.

[0032] like Figure 4 , Figure 6 , Figure 7 , Figure 9As shown, one side of the clamping block 3 is provided with an angled section that slopes downward toward the connecting groove 24, and the other side of the clamping block 3 is provided with several clamping grooves 31. The clamping grooves 31 are arc-shaped, and the arc-shaped clamping grooves 31 increase the contact range between the clamping grooves 31 and the line to increase the clamping effect.

[0033] like Figure 6 , Figure 9 As shown, a spring 321 is fixedly installed on the side wall of the slide rail groove 23 near the insertion hole 22. The other end of the spring 321 is fixedly installed on the side of the limit block a32. In the initial state, the spring 321 is not compressed and the clamping block 3 does not clamp the line. When the push rod 33 moves downward, the inclined surface of the push rod 33 presses the inclined angle of the clamping block 3 to push the clamping block 3 to move towards the insertion hole 22. The clamping block 3 clamps and fixes the line inserted into the insertion hole 22 through the arc-shaped clamping groove 31. At this time, the spring 321 is compressed. When it is necessary to remove the line, push the push rod 33 upward and the spring 321 returns to its original position to push the clamping block 3 to move towards both sides of the mounting groove 21 to facilitate the removal of the line.

[0034] like Figure 2 , Figure 3 , Figure 8 As shown, limit blocks b331 are symmetrically fixed on both sides of the push rod 33. The limit blocks b331 are slidably engaged in the connecting groove 24. The push rod 33 has a triangular prism structure, and the clamping block 3 has a trapezoidal structure. The inclined surface of the push rod 33 and the inclined side of the clamping block 3 are always in close contact. By pushing the limit blocks b331, the push rod 33 is driven to slide along the connecting groove 24.

[0035] like Figure 2 , Figure 3 As shown, several locking blocks 241 are symmetrically fixedly installed on the side wall of the connecting groove 24. The upper surface of the locking block 241 is provided with an oblique angle that slopes downward toward the middle of the connecting groove 24. The locking block 241 is made of flexible material, preferably flexible rubber material. The lower surface of the locking block 241 limits the push rod 33 to prevent the push rod 33 from moving upward, thereby fixing the position of the push rod 33 and thus fixing the position of the clamping block 3. When it is necessary to remove the line, the limiting block b331 is pushed upward to make the push rod 33 move upward.

[0036] In practical use, the wire is inserted into the socket 22 of the mounting block 2, and the limiting block b331 is pushed downward to drive the push rod 33 to move downward along the connecting groove 24. The clamping block 3 has a downward-sloping angle on one side towards the connecting groove 24. The push rod 33 is a triangular prism, and the clamping block 3 is a trapezoidal structure. The inclined surface of the push rod 33 and the inclined side of the clamping block 3 are always in close contact. When the push rod 33 moves downward, the inclined surface of the push rod 33 presses against the angle of the clamping block 3, pushing the clamping block 3 towards the socket 22. The clamping block 3 clamps the wire inserted into the socket 22 through the arc-shaped clamping groove 31. When the connection is fixed, the spring 321 is compressed. Several locking blocks 241 are symmetrically fixedly installed on the side wall of the connecting groove 24. The upper surface of the locking block 241 is provided with an angled opening that slopes downward toward the middle of the connecting groove 24. The locking block 241 is made of flexible material. The lower surface of the locking block 241 limits the push rod 33 to prevent the push rod 33 from moving upward, thereby fixing the position of the push rod 33 and thus fixing the position of the clamping block 3. When it is necessary to remove the line, the limiting block b331 is pushed upward to make the push rod 33 move upward. At this time, the spring 321 is reset, so as to push the clamping block 3 to move to both sides of the mounting groove 21, thereby facilitating the removal of the line.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A test fixture, comprising a test plate (1), characterized in that, The test board (1) has several switches (14) fixedly installed on its upper surface. A connector b (12) and a connector c (13) are fixedly installed on one side of the upper surface of the test board (1). A connector a (11) is fixedly installed on one side of connector b (12). The test board (1) also includes: Mounting blocks (2) are fixedly installed on both sides of the switch (14). Mounting slots (21) are provided in the mounting blocks (2). A number of insertion holes (22) communicating with the mounting slots (21) are symmetrically provided on the upper surface of the mounting blocks (2). Clamping blocks (3) are symmetrically slidably installed in the mounting slots (21). Connecting slots (24) are provided through the side walls at both ends of the mounting blocks (2). Push rods (33) are slidably installed in the connecting slots (24). When the push rods (33) move downward along the connecting slots (24), the push rods (33) push the clamping blocks (3) to fix the wires inserted into the insertion holes (22).

2. The test fixture according to claim 1, characterized in that, A gasket (111) is fixedly installed on the side wall of the connector a (11) near the lower edge. The gasket (111) is made of flexible material. The connectors a (11), b (12), and c (13) have the same structure.

3. The test fixture according to claim 1, characterized in that, The mounting groove (21) has several slide rail grooves (23) symmetrically opened on its upper and lower side walls. The clamping block (3) has a limiting block a (32) symmetrically fixedly installed on its upper and lower surfaces. The limiting block a (32) is snapped into the slide rail groove (23). The limiting block a (32) is a T-shaped structure that is compatible with the slide rail groove (23).

4. The test fixture according to claim 1, characterized in that, The clamping block (3) has a downward angled opening on one side towards the connecting groove (24), and a number of clamping grooves (31) are opened on the other side of the clamping block (3), and the clamping grooves (31) are arc-shaped.

5. The test fixture according to claim 3, characterized in that, A spring (321) is fixedly installed on the side wall of the slide rail groove (23) near the insertion hole (22), and the other end of the spring (321) is fixedly installed on the side of the limiting block a (32).

6. The test fixture according to claim 1, characterized in that, Limiting blocks b (331) are symmetrically fixed on both sides of the push rod (33). The limiting blocks b (331) are slidably engaged in the connecting groove (24). The push rod (33) has a triangular prism structure, and the clamping block (3) has a trapezoidal structure. The inclined surface of the push rod (33) and the inclined side of the clamping block (3) are always closely fitted.

7. The test fixture according to claim 1, characterized in that, The connecting groove (24) has several locking blocks (241) symmetrically fixedly installed on its side wall. The upper surface of the locking block (241) is provided with an oblique angle that slopes downward toward the middle of the connecting groove (24). The locking block (241) is made of flexible material.

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