Circuit board test tool clamp

Abstract

The utility model provides a circuit board testing tool clamp, and belongs to the technical field of circuit board testing. The utility model discloses a circuit board test tool clamp. Round tension spring grooves are formed between the upper clamping plate and the lower clamping plate which are located at the stress ends, and tension springs are arranged between the tension spring grooves of the upper clamping plate and the lower clamping plate. A threaded column protruding upwards is fixedly arranged at the circle center of the tension spring groove of the lower clamping plate. The threaded column is in threaded connection with one end of the first hexagonal hollow stud; transverse moving grooves corresponding to the threaded columns are formed in the upper clamping plate at the stress end in the length direction of the upper clamping plate in a penetrating mode. The first adjusting stud penetrates through the transverse moving groove and is in threaded connection with the first hexagonal hollow stud; the diameter of the first adjusting stud adjusting head is larger than the width of the transverse moving groove. According to the utility model, the preloading stroke of the tension spring can be flexibly and conveniently adjusted with low cost, the vertical and horizontal distance between the telescopic probe contact and the test point of the circuit board to be tested is adjusted, and the circuit boards to be tested with different thicknesses and structures can be tested in a compatible manner.

Description

Technical Field

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

[0002] After the circuit board is manufactured, it needs to undergo basic functional tests, such as power-on, short circuit, and open circuit. Initially, for small-batch production, the testing method involved manually aligning the probes of a multimeter with the test points on the circuit board. This method was extremely inefficient and unsuitable for batch testing. Later, circuit board testing fixtures were developed, which can fix the circuit board in the positioning slot of the base. By rotating the handle, the probes are moved towards the circuit board and accurately aligned with the test points, ensuring accurate alignment and convenient operation.

[0003] The applicant owns the utility model patents with patent application numbers CN202122068572.1 and CN202122068580.6. These two patents disclose a fixture for circuit board testing. However, some shortcomings were found in the further use of this fixture. It cannot conveniently and flexibly adjust the preload stroke of the tension spring according to the actual situation of the circuit board to be tested, so as to adjust the appropriate distance between the telescopic probe and the circuit board to be tested with different thicknesses and structures, and adapt to different testing modes. Utility Model Content

[0004] The technical problem to be solved by this utility model is that existing circuit board test fixtures cannot be flexibly and cost-effectively adapted to the thickness, structure and horizontal position of the test points on the circuit board to be tested. In view of the shortcomings of the prior art, a circuit board test fixture is provided.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A circuit board testing fixture includes an upper clamping plate, a lower clamping plate, a pin, a circuit board, an auxiliary positioning plate, a base plate, a telescopic probe, and a first adjusting stud. The upper and lower clamping plates are hinged together by the pin. One end of the circuit board testing fixture is a testing end, and the other end is a force-bearing end. A circuit board is mounted on the upper clamping plate at the testing end. The telescopic probe is electrically connected to the circuit board. The telescopic probe is fixedly connected to the auxiliary positioning plate. The telescopic probe passes vertically through the circuit board and the auxiliary positioning plate. The circuit board, the upper clamping plate, and the auxiliary positioning plate are sequentially fixedly connected by positioning bolts. A base plate is fixedly connected to the lower clamping plate at the testing end by bolts.

[0007] A preload assembly is provided between the upper and lower clamping plates at the force-bearing end; the preload assembly includes circular tension spring grooves on opposite sides of the upper and lower clamping plates; a tension spring is provided between the tension spring grooves of the upper and lower clamping plates; an upwardly protruding threaded post is fixedly provided at the center of the tension spring groove of the lower clamping plate; the threaded post is threadedly connected to one end of a first hexagonal hollow stud; a transverse sliding groove is provided through the upper clamping plate at the force-bearing end along the length direction of the upper clamping plate; the first adjusting stud passes through the transverse sliding groove and is threadedly connected to the first hexagonal hollow stud; the diameter of the adjusting head of the first adjusting stud is larger than the width of the transverse sliding groove.

[0008] Furthermore, a travel chamber is fixedly installed on the upper clamping plate at the force-bearing end.

[0009] Furthermore, an adjustment hole is provided above the travel chamber; a wire groove is provided through the travel chamber along the length of the upper clamping plate.

[0010] Furthermore, the circuit board is electrically connected via terminal blocks and wires passing through wire slots.

[0011] Furthermore, the compression stroke height of the tension spring is less than the height of the stroke chamber.

[0012] Furthermore, the circuit board, upper clamping plate, and auxiliary positioning plate located at the test end have several corresponding threaded holes on both sides along the length direction.

[0013] Furthermore, the base plate is positioned below the lower clamping plate; at least four second hexagonal hollow studs are embedded and fixed on the base plate; threaded holes corresponding to the second hexagonal hollow studs are opened on the lower clamping plate; the lower clamping plate and the base plate are fixedly connected by second adjusting studs.

[0014] Compared with the prior art, this utility model can flexibly and conveniently adjust the preload stroke of the tension spring, adjust the vertical distance between the telescopic probe contact and the test point of the circuit board to be tested according to the different thicknesses and structures of the circuit board to be tested, and flexibly adjust the position of the circuit board and the auxiliary positioning plate relative to the upper clamping plate according to the test point position of different circuit boards to be tested, thereby adjusting the horizontal extension distance of the telescopic probe. This circuit board testing fixture is low-cost and can be easily and quickly adapted to various types of circuit boards to be tested. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings.

[0016] Figure 1 : A three-dimensional structural schematic diagram of Embodiment 1 of this utility model;

[0017] Figure 2 : Schematic diagram of the structure of the transverse sliding groove inside the travel compartment in Embodiment 1 of this utility model;

[0018] Figure 3 : A three-dimensional structural schematic diagram of Embodiment 2 of this utility model;

[0019] Figure 4 : Enlarged structural schematic diagram of section A in Embodiment 2 of this utility model;

[0020] Among them, 1-upper clamping plate, 2-lower clamping plate, 3-pin shaft, 4-circuit board, 41-positioning bolt, 42-threaded hole, 43-terminal plug, 44-wire, 5-auxiliary positioning plate, 6-base plate, 61-second hexagonal hollow stud, 62-second adjusting stud, 7-telescopic probe, 8-preload assembly, 81-tension spring groove, 82-tension spring, 83-threaded stud, 84-first hexagonal hollow stud, 85-lateral groove, 86-first adjusting stud, 9-stroke chamber, 91-adjusting hole, 92-wire groove. Detailed Implementation

[0021] To better understand this utility model, the following embodiments further illustrate its content, but the scope of protection of this utility model is not limited to the embodiments described below. Numerous specific details are set forth in the following description to provide a more thorough understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without one or more of these details.

[0022] Example 1, see Figure 1-2 A circuit board testing fixture includes an upper clamping plate 1, a lower clamping plate 2, a pin 3, a circuit board 4, an auxiliary positioning plate 5, a base plate 6, and a telescopic probe 7. The upper clamping plate 1 and the lower clamping plate 2 are hinged together by the pin 3. One end of the circuit board testing fixture is a testing end, and the other end is a force-bearing end. The circuit board 4 is mounted on the upper clamping plate 1 at the testing end. The telescopic probe 7 is electrically connected to the circuit board 4. The telescopic probe 7 is fixedly connected to the auxiliary positioning plate 5. The telescopic probe 7 passes vertically through the circuit board 4 and the auxiliary positioning plate 5. The circuit board 4, the upper clamping plate 1, and the auxiliary positioning plate 5 are sequentially fixedly connected by positioning bolts 41. The base plate 6 is fixedly connected to the lower clamping plate 2 at the testing end by bolts.

[0023] A preload assembly 8 is provided between the upper clamping plate 1 and the lower clamping plate 2 at the force-bearing end; the preload assembly 8 includes a circular tension spring groove 81 opened on the opposite side of the upper and lower clamping plates; a tension spring 82 is provided between the tension spring grooves 81 of the upper and lower clamping plates; a threaded post 83 protruding upward is fixedly provided at the center of the tension spring groove of the lower clamping plate; the threaded post 83 is threadedly connected to one end of a first hexagonal hollow stud 84; a transverse sliding groove 85 is provided through the upper clamping plate at the force-bearing end along the length direction of the upper clamping plate; the first adjusting stud 86 passes through the transverse sliding groove 85 and is threadedly connected to the other end of the first hexagonal hollow stud 84; the diameter of the adjusting head of the first adjusting stud is larger than the width of the transverse sliding groove 85.

[0024] Furthermore, a travel chamber 9 is fixedly installed on the upper clamping plate 1 located at the force-bearing end. An adjustment hole 91 is provided above the travel chamber 9; a wire groove 92 is provided through the travel chamber along the length direction of the upper clamping plate.

[0025] Furthermore, the circuit board 4 is electrically connected via a terminal block 43 and a wire 44 passing through the wire groove 92.

[0026] Using this method, when the preload of the tension spring 82 needs to be adjusted according to the thickness of the circuit board to be tested, it is only necessary to use the adjustment hole 91 opened on the stroke chamber 9 and the tool corresponding to the adjustment head of the first adjustment stud 86 to perform the corresponding screw-in and screw-out operation, thereby changing the stroke of the threaded connection between the first adjustment stud 86 and the first hexagonal hollow stud 84, further adjusting the preload of the tension spring 82, and obtaining the appropriate vertical distance between the contact point of the telescopic probe 7 and the test point on the circuit board to be tested.

[0027] By setting the stroke chamber 9 on the upper clamping plate at the force-bearing end, the force-bearing end is further facilitated and pressure is applied. It also further protects the normal lateral movement of the first adjusting stud 86 along the transverse groove 85 when pressure is applied without interference. In addition, a wire groove 92 is opened through the stroke chamber 9 along the length of the upper clamping plate 1, which constrains the relative position of the wire and makes it neat and beautiful.

[0028] Furthermore, the compression stroke height of the tension spring 82 is less than the height of the stroke chamber 9.

[0029] Furthermore, the circuit board 4, upper clamping plate 1, and auxiliary positioning plate 5 located at the test end have several corresponding threaded holes 42 on both sides along their length. By adjusting the positioning bolts 41 as they pass through the different corresponding threaded holes 42 on the circuit board 4, upper clamping plate 1, and auxiliary positioning plate 5, the positions of the circuit board 4 and auxiliary positioning plate 5 relative to the upper clamping plate 1 are adjusted, thereby changing the horizontal extension distance of the telescopic probe 7 and adapting it to test points at different horizontal distances on the circuit board under test.

[0030] Compared with the prior art, this utility model can flexibly and conveniently adjust the preload stroke of the tension spring, adjust the vertical distance between the telescopic probe contact and the test point of the circuit board to be tested according to the different thicknesses and structures of the circuit board to be tested, and flexibly adjust the position of the circuit board and the auxiliary positioning plate relative to the upper clamping plate according to the test point position of different circuit boards to be tested, thereby adjusting the horizontal extension distance of the telescopic probe.

[0031] Example 2: See Figure 3-4 The circuit board testing fixture provided in this embodiment is an improvement on embodiment 1 with the following modifications:

[0032] This improvement is mainly aimed at situations where the test points on the circuit board to be tested are located on the connection terminals. The height of the connection terminals is several times thicker than the thickness of a normal circuit board to be tested, which makes it difficult for the upper clamp 1 and the lower clamp 2 to open and close in an efficient and rapid manner to test the test points on the connection terminals of the circuit board to be tested.

[0033] The base plate 6 is located below the lower clamping plate 2; at least four second hexagonal hollow studs 61 are embedded and fixed on the base plate 6; the lower clamping plate 2 has threaded holes corresponding to the second hexagonal hollow studs 61; the lower clamping plate 2 and the base plate 6 are fixedly connected by a second adjusting stud 62.

[0034] In use, at least four second adjusting studs 62 are screwed downwards through the threaded holes on the lower clamping plate 2 to the same length as the lower clamping plate, and then threadedly connected to the corresponding second hexagonal hollow studs 61 on the base plate 6. The at least four second adjusting studs 62 are screwed in to the same travel distance, which realizes the separation and fixation of the second adjusting studs 62, and the relative height between the lower clamping plate 2 and the base plate 6 can be freely adjusted. With the opening and closing angle of the upper clamping plate 1 and the lower clamping plate 2 remaining unchanged, the height of the base plate 6 to the contact point of the telescopic probe 7 can be adjusted to increase more conveniently and at a lower cost, making it more compatible with the circuit board under test whose test point is located on the connection terminal.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

[0036] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A circuit board testing fixture, comprising an upper clamping plate, a lower clamping plate, a pin, a circuit board, an auxiliary positioning plate, a base plate, and a telescopic probe, and a first adjusting stud; the upper clamping plate and the lower clamping plate are hinged by the pin; one end of the circuit board testing fixture is a testing end, and the other end is a force-bearing end; a circuit board is disposed on the upper clamping plate located at the testing end; the telescopic probe is electrically connected to the circuit board; the telescopic probe is fixedly connected to the auxiliary positioning plate; the telescopic probe passes perpendicularly through the circuit board and the auxiliary positioning plate; the circuit board, the upper clamping plate, and the auxiliary positioning plate are sequentially passed through and fixedly connected by positioning bolts; a base plate is fixedly connected to the lower clamping plate located at the testing end by bolts; characterized in that: A preload assembly is provided between the upper and lower clamping plates at the force-bearing end; the preload assembly includes circular tension spring grooves on opposite sides of the upper and lower clamping plates, and a tension spring is provided between the tension spring grooves of the upper and lower clamping plates; an upwardly protruding threaded post is fixedly provided at the center of the tension spring groove of the lower clamping plate; the threaded post is threadedly connected to one end of a first hexagonal hollow stud; a transverse sliding groove is provided through the upper clamping plate at the force-bearing end along the length direction of the upper clamping plate; the first adjusting stud passes through the transverse sliding groove and is threadedly connected to the other end of the first hexagonal hollow stud; the diameter of the adjusting head of the first adjusting stud is larger than the width of the transverse sliding groove.

2. The circuit board testing fixture according to claim 1, characterized in that: A travel chamber is fixedly installed on the upper clamp plate at the force-bearing end.

3. The circuit board testing fixture according to claim 2, characterized in that: An adjustment hole is provided above the travel chamber; a wire groove is provided through the travel chamber along the length of the upper clamping plate.

4. The circuit board testing fixture according to claim 3, characterized in that: The circuit board is electrically connected via terminal blocks and wires passing through wire slots.

5. A circuit board testing fixture according to claim 4, characterized in that: The compression stroke height of the tension spring is less than the height of the stroke chamber.

6. The circuit board testing fixture according to claim 1, characterized in that: The circuit board, upper clamping plate, and auxiliary positioning plate located at the test end have several corresponding threaded holes on both sides along the length direction.

7. A circuit board testing fixture according to claim 1, characterized in that: The base plate is located below the lower clamping plate; at least four second hexagonal hollow studs are embedded and fixed on the base plate; the lower clamping plate has threaded holes corresponding to the second hexagonal hollow studs; the lower clamping plate and the base plate are fixedly connected by second adjusting studs.

8. A circuit board testing fixture according to claim 7, characterized in that: The circuit board, upper clamping plate, and auxiliary positioning plate located at the test end have several corresponding threaded holes on both sides along the length direction.

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