A detection jig for a circuit board

Abstract

The utility model discloses a detection jig for circuit board, including base and setting on the base locating block, in the base both sides respectively recessed have the board area, be equipped with the jacking structure in the board area, the jacking structure includes sliding block, jacking piece and connecting rod, the board area both sides respectively recessed have the movable slot, the sliding block movable setting in movable slot can be relative base horizontal activity, the jacking piece up and down movable setting in the board area, the connecting rod is hinged in between sliding block and jacking piece. Through setting the jacking structure of sliding block, jacking piece and connecting rod in the board area, need not reserve too deep board area, can take the circuit board through jacking piece auxiliary, effectively thin the base thickness, reduce material cost, reduce the area of jig concrete, save the station space.

Description

Technical Field

[0001] This utility model specifically relates to a testing fixture for circuit boards. Background Technology

[0002] In the circuit board production and inspection process, the inspection fixture is a key piece of equipment for achieving precise positioning of the circuit board and ensuring inspection accuracy. It typically consists of a base and positioning blocks set on the base. The positioning blocks are used to fix and limit the circuit board. To facilitate the operator's easy removal of the circuit board after inspection, lifting areas are usually provided on both sides of the base. The operator can reach through the lifting areas to easily remove the circuit board from the positioning blocks.

[0003] However, in existing technologies, the lifting area needs to have sufficient depth to ensure that operators can easily reach and touch the circuit board to complete the retrieval action. This necessitates a relatively thick base to accommodate the lifting area. An excessively thick base not only increases raw material consumption and production costs but also increases the overall size of the fixture, occupying more testing station space. Furthermore, it hinders the lightweight design and handling adjustments of the fixture. Therefore, effectively reducing the thickness of the base while ensuring convenient circuit board retrieval in the lifting area has become a critical issue that urgently needs to be addressed in the development of circuit board testing fixtures. Utility Model Content

[0004] In view of the deficiencies of the existing technology, the technical problem to be solved by this utility model is to provide a testing fixture for circuit boards. A testing fixture for circuit boards includes a base and a positioning block disposed on the base. Recessed lifting areas are located on both sides of the base, and a lifting structure is provided within each lifting area. The lifting structure includes a slider, a lifting member, and a connecting rod. Movable grooves are recessed on both sides of the lifting areas. The slider is movably disposed within the movable grooves and can move horizontally relative to the base. The lifting member is movably disposed vertically within the lifting areas, and the connecting rod is hinged between the slider and the lifting member.

[0005] In one embodiment, the lifting structure further includes a spring, the movable groove includes a horizontal groove and a vertical groove that are interconnected, the spring abuts against the lower side of the slider, and the slider is positioned in the vertical groove by the spring.

[0006] In one embodiment, the lower side of the slider is recessed to accommodate the groove of the spring.

[0007] In one embodiment, the base includes an annular base plate and a positioning plate detachably connected to the inner ring of the annular base plate, wherein the positioning block is disposed on the positioning plate.

[0008] In one embodiment, the upper side of the annular substrate has a positioning groove recessed along its inner ring edge contour for cooperating with the circuit board, and the outer contour of the positioning plate is the same as the outer contour of the positioning groove, so that the positioning plate can be fitted into the positioning groove.

[0009] In one embodiment, the positioning plate is made of transparent acrylic.

[0010] In one embodiment, foot pads are threadedly connected to the four corners of the lower side of the base, and a guide hole is provided through the lower side of the lifting plate area. The lifting member is inserted into the guide hole through a linear bearing.

[0011] In summary, the advantages of this utility model over the prior art are: This utility model, by setting a lifting structure consisting of a slider, a lifting component and a connecting rod in the lifting area, eliminates the need to reserve an excessively deep lifting area. The lifting component can assist in picking up the circuit board, effectively reducing the thickness of the base, lowering material costs, reducing the size of the treatment unit, and saving workstation space. Furthermore, the spring configuration in the lifting structure can stably hold the slider at the upper end of the vertical groove in the movable slot to achieve self-locking, ensuring that the lifting part is always stored in the lifting plate area when not being picked up, avoiding accidental pop-out of the lifting part due to accidental contact, and improving the stability and safety of the fixture. During operation, only simple force is needed to break the self-locking, making it convenient to use. Attached Figure Description

[0012] Figure 1 This is one of the exploded views of a testing fixture for circuit boards according to one embodiment of the present invention; Figure 2 This is a second exploded view of a testing fixture for circuit boards according to one embodiment of the present invention; Figure 3 This is a perspective view of a testing fixture for circuit boards according to one embodiment of the present invention. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1 to 3 The present invention preferably provides a testing fixture for circuit boards, comprising a base 1 and a positioning block 2 disposed on the base 1. Lifting plate areas 3 are recessed on both sides of the base 1, and a lifting structure is provided within each lifting plate area 3. The lifting structure includes a slider 4, a lifting member 5, and a connecting rod 6. Movable grooves 7 are recessed on both sides of the lifting plate area 3. The slider 4 is movably disposed within the movable grooves 7 and can move horizontally relative to the base 1. The lifting member 5 is movably disposed vertically within the lifting plate area 3. The connecting rod 6 is hinged between the slider 4 and the lifting member 5.

[0014] Specifically, the left and right sides of the lifting area are recessed inward to form movable grooves, which extend along the width of the base. A slider is slidably installed within the movable groove, allowing for horizontal reciprocating motion. A lifting component is vertically mounted within the lifting area, with its top end designed as a smooth arc to prevent scratches to hands or the circuit board during handling. One end of a connecting rod is hinged to the side of the slider facing the lifting component, and the other end is hinged to the lower end of the lifting component, with the connecting rod arranged at an angle. When the circuit board needs to be retrieved after inspection, the sliders on both sides are pushed inward, moving horizontally within the movable grooves. This movement, via the connecting rod, pushes the lifting component upward, lifting the edge of the circuit board or providing a fulcrum for the hand, facilitating retrieval. After retrieval, the sliders are pulled outward, causing the lifting component to return to its original position within the lifting area via the connecting rod.

[0015] Furthermore, the lifting structure also includes a spring 8, and the movable groove 7 includes a horizontal groove 9 and a vertical groove 10 that are interconnected. The spring 8 abuts against the lower side of the slider 4, and the slider 4 is positioned in the vertical groove 10 by the spring 8.

[0016] Specifically, in its natural state, the spring is extended, using its elastic force to push the slider upwards, keeping it stably positioned at the top of the vertical groove, achieving self-locking. At this time, the slider cannot move freely horizontally, and the lifting component is stably stored within the lifting area. When the circuit board needs to be retrieved, the operator presses the slider downwards, overcoming the spring force to move it down to a position flush with the horizontal groove. Then, the operator pushes the slider towards the horizontal groove, causing it to move along the groove and drive the lifting component upwards via a connecting rod. After retrieval, the slider is pulled back below the vertical groove, and releasing it allows the spring force to lift the slider back to the top of the vertical groove, restoring self-locking.

[0017] Furthermore, the lower side of the slider 4 is recessed to accommodate the groove 11 of the spring 8.

[0018] Specifically, the inner diameter of the groove matches the outer diameter of the spring, and the upper end of the spring is embedded in the groove and tightly abuts against the top of the groove. The groove not only limits the spring, preventing it from shifting laterally or falling off the slider during extension and retraction, but also makes the spring's holding force on the slider more concentrated and uniform, ensuring that the slider's self-locking state at the upper end of the vertical groove is stable and reliable, and avoiding self-locking failure caused by uneven force.

[0019] Furthermore, the base 1 includes an annular base plate 12 and a positioning plate 13 detachably connected to the inner ring of the annular base plate 12, and the positioning block 2 is disposed on the positioning plate 13.

[0020] Specifically, the positioning plate is detachably connected to the inner ring of the annular substrate. The detachable connection can be achieved using a snap-fit ​​connection, with multiple elastic snaps on the inner ring sidewall of the annular substrate and corresponding slots on the edge of the positioning plate. The positioning plate is fixed to the annular substrate through the engagement of the snaps and slots. Alternatively, a screw connection can be used, with corresponding threaded holes on both the annular substrate and the positioning plate, allowing for secure fastening. The positioning plate can be replaced to adapt to the positioning requirements of different circuit boards for testing.

[0021] Furthermore, the upper side of the annular substrate 12 is recessed along its inner ring edge contour to accommodate the circuit board, and the outer contour of the positioning plate 13 is the same as that of the positioning groove 14, so that the positioning plate 13 can fit into the positioning groove 14.

[0022] Specifically, the outline of the positioning plate perfectly matches the outline of the positioning groove, allowing the positioning plate to be accurately embedded into the positioning groove for rapid positioning and installation. Simultaneously, the outline of the positioning groove matches the edge outline of the circuit board to be tested. When the circuit board is placed on the positioning plate, the edge of the circuit board fits against the inner wall of the positioning groove, further enhancing the positioning stability of the circuit board and not hindering operators from retrieving the circuit board from the lifting area.

[0023] Furthermore, the positioning plate 13 is made of transparent acrylic.

[0024] Specifically, transparent acrylic material has high light transmittance, allowing operators to clearly observe the contact between the bottom of the circuit board and the testing probe through the positioning plate during the inspection process. It also provides a direct view of the circuit board's placement when handling it, preventing damage due to obstructed vision and effectively improving the safety and efficiency of inspection and handling. Furthermore, transparent acrylic possesses good mechanical strength and wear resistance, meeting the long-term use requirements of the fixture.

[0025] Furthermore, foot pads 15 are threadedly connected to the four corners of the lower side of the base 1, and a guide hole is provided through the lower side of the lifting plate area 3. The lifting member 5 is inserted into the guide hole through a linear bearing.

[0026] Specifically, the foot pads with four threaded connections on the lower side of the base can be adjusted in height by rotation, allowing the fixture to be placed stably on worktables with varying flatness, enhancing overall placement stability and preventing fixture wobbling during testing that could affect accuracy. Linear bearings are installed in the guide holes on the lower side of the lifting plate area, and the lifting components move up and down via these bearings, significantly reducing frictional resistance during lifting, making the lifting action smoother, reducing component wear, and extending the service life of the lifting structure. Furthermore, the foot pads provide sufficient space for the lifting components to move up and down.

[0027] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A testing fixture for circuit boards, comprising a base (1) and a positioning block (2) disposed on the base (1), wherein a lifting plate area (3) is recessed on both sides of the base (1), characterized in that: The lifting plate area (3) is provided with a lifting structure; the lifting structure includes a slider (4), a lifting member (5) and a connecting rod (6). The lifting plate area (3) has recessed movable grooves (7) on both sides. The slider (4) is movably disposed in the movable groove (7) and can move horizontally relative to the base (1). The lifting member (5) is movably disposed in the lifting plate area (3). The connecting rod (6) is hinged between the slider (4) and the lifting member (5).

2. The testing fixture for circuit boards according to claim 1, characterized in that: The lifting structure also includes a spring (8), the movable groove (7) includes a horizontal groove (9) and a vertical groove (10) that are connected to each other, the spring (8) abuts against the lower side of the slider (4), and the slider (4) is positioned in the vertical groove (10) by the spring (8).

3. The testing fixture for circuit boards according to claim 2, characterized in that: The lower side of the slider (4) has a recess (11) that can accommodate the spring (8).

4. The testing fixture for circuit boards according to claim 1, characterized in that: The base (1) includes an annular base plate (12) and a positioning plate (13) detachably connected to the inner ring of the annular base plate (12), and the positioning block (2) is disposed on the positioning plate (13).

5. A testing fixture for circuit boards according to claim 4, characterized in that: The upper side of the annular substrate (12) has a positioning groove (14) recessed along its inner ring edge contour for cooperating with the circuit board, and the outer contour of the positioning plate (13) is the same as the outer contour of the positioning groove (14) so ​​that the positioning plate (13) can be fitted into the positioning groove (14).

6. A testing fixture for circuit boards according to claim 4, characterized in that: The positioning plate (13) is made of transparent acrylic.

7. A testing fixture for circuit boards according to claim 1, characterized in that: The base (1) has four foot pads (15) threadedly connected to the four corners of the lower side. The lifting plate area (3) has a guide hole through the lower side. The lifting member (5) is inserted into the guide hole through a linear bearing.

Images