Product resistance value test fixture

Abstract

The utility model discloses a product resistance value test fixture, relates to the field of circuit board production, and aims to solve the problem that in the prior art, circuit boards are put into a placement groove to be fixed, and due to the limitation of the size of the placement groove, the fixation applicability of the circuit boards with different sizes is limited. A rectangular sliding groove is formed in the middle of the interior of the containing table, fixing blocks are fixedly connected to the two sides of the middle of the interior of the rectangular sliding groove correspondingly, rectangular sliding blocks are arranged on the outer sides of the two fixing blocks correspondingly, strip-shaped openings are formed in the two sides of the middle of the upper end face of the containing table correspondingly, and connecting blocks are fixedly connected to the upper ends of the two rectangular sliding blocks correspondingly. The upper ends of the two connecting blocks penetrate through the two strip-shaped openings correspondingly, extend out of the upper end face of the placing table and are fixedly connected with U-shaped clamping rods correspondingly, and the front ends and the rear ends of the inner sides of the two U-shaped clamping rods are fixedly connected with triangular clamping blocks correspondingly.

Description

Technical Field

[0001] This utility model relates to the field of circuit board manufacturing, specifically a product resistance value testing fixture. Background Technology

[0002] A circuit board (PCB) is a substrate used to connect and support electronic components, with conductive lines and mounting positions for these components printed on it. It is an indispensable part of electronic devices, carrying the signal transmission and power supply between components. PCBs can be classified according to their characteristics into flexible printed circuit boards (FPCs), rigid printed circuit boards (PCBs), and rigid-flex boards. They are characterized by miniaturization and intuitive design, playing a crucial role in electronic products. After production, PCBs need to be fixed in fixtures for resistance testing.

[0003] For example, patent announcement number CN212646759U discloses a special fixture for testing the resistance value of PCB circuit boards, including a fixed plate, positioning posts, mounting holes, placement slots, a support plate, a guide slot, a guide block, a mounting plate, a cylinder, a clamping plate, a connecting box, a movable cavity, a slider, a through hole, a sliding groove, a first spring, a guide post, a sleeve, a second spring, and a connecting rod. The PCB board can be placed directly on the surface of the support plate, and then the PCB board is pressed down. The connecting rod moves along the sleeve to the bottom, compressing the second spring. At this time, the PCB board will be locked inside the placement slot, completing the positioning. Then, under the reaction force of the second spring, the support plate will pop out the PCB board for easy removal. The cylinder drives the clamping plate to move, and the clamping plate moves outward along the sliding groove. The first spring on the surface of the guide post is compressed by the slider, thus the clamping plate can limit the PCB board on the surface of the support plate. Under the action of the first spring, the clamping plate can be quickly reset for easy operation.

[0004] However, the above-mentioned technology, which fixes the circuit board by placing it inside the placement slot, has limited applicability to circuit boards of different sizes due to the size limitation of the placement slot; therefore, the market urgently needs to develop a product resistance value testing fixture to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a product resistance value testing fixture to solve the problem mentioned in the background art that the existing technology, which fixes the circuit board by placing it inside the placement slot, has limited applicability to fixing circuit boards of different sizes due to the size limitation of the placement slot.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a product resistance value testing fixture, including a placement platform, a rectangular slide groove is provided in the middle of the placement platform, fixing blocks are fixedly connected to both sides of the middle of the rectangular slide groove, rectangular sliding blocks are provided on the outer sides of the two fixing blocks, strip openings are provided on both sides of the middle of the upper surface of the placement platform, connecting blocks are fixedly connected to the upper ends of the two rectangular sliding blocks, the upper ends of the two connecting blocks extend out of the upper surface of the placement platform through the two strip openings respectively and are fixedly connected to U-shaped clamping rods, and triangular clamping blocks are fixedly connected to the front and rear ends of the inner sides of the two U-shaped clamping rods.

[0007] Preferably, guide rods are fixedly connected to the outer sides of the two fixed blocks and the two end faces of the rectangular sliding groove, and guide through holes are provided on the two rectangular sliding blocks.

[0008] Preferably, the two guide rods pass through the guide holes on the two rectangular sliding blocks respectively, and springs are provided on the outer sides of the two guide rods and between the two end faces of the rectangular slide groove and the outer sides of the two rectangular sliding blocks respectively.

[0009] Preferably, a linkage bar is fixedly connected to the inner side of each of the two rectangular sliding blocks, and a strip-shaped tooth is fixedly connected to the inner end face of each of the two linkage bars.

[0010] Preferably, a fixed shaft is fixedly connected to the center of the rectangular groove, and a linkage gear is rotatably connected to the fixed shaft.

[0011] Preferably, the toothed portions on the inner sides of the two linkage bars are respectively engaged with the teeth at the front and rear ends of the linkage gear.

[0012] Preferably, rubber pads are fixedly provided on the inner inclined end faces of both triangular clamping blocks.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, by designing a linked U-shaped clamping rod and a rectangular sliding block structure, the operator only needs to pull any one of the U-shaped clamping rods to achieve synchronous movement of the two U-shaped clamping rods, thereby simplifying the operation process and improving work efficiency. At the same time, this design also increases the applicability of the fixture, enabling it to easily cope with circuit boards of different sizes without the need to change to different specifications of fixtures.

[0015] (2) In this utility model, the restoring force of the spring is used as the clamping force, which not only achieves stable clamping of the circuit board, but also avoids the problem of excessive clamping force causing damage to the circuit board that may exist in traditional fixtures.

[0016] (3) In this utility model, by setting rubber pads, rubber pads are fixedly set on the inner inclined end surfaces of the two triangular clamps. The rubber pads separate the circuit board side and the triangular clamps to prevent the circuit board from being damaged due to excessive clamping force of the triangular clamps. Attached Figure Description

[0017] Figure 1 This is a front view of a product resistance value testing fixture according to the present invention;

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a top sectional view of the present invention;

[0020] Figure 4 This is a detailed enlarged view of part A of this utility model.

[0021] In the diagram: 1. Placement platform; 101. Rectangular slide groove; 102. Fixing block; 103. Strip opening; 2. Guide rod; 201. Spring; 3. Rectangular sliding block; 301. Guide through hole; 302. Linkage bar; 303. Strip toothed part; 304. Connecting block; 4. U-shaped clamping rod; 401. Triangular clamping block; 402. Rubber pad; 5. Fixing shaft; 501. Linkage gear. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4 This utility model provides an embodiment of a product resistance value testing fixture, including a placement platform 1. A rectangular slide groove 101 is provided in the center of the placement platform 1. Fixing blocks 102 are fixedly connected to both sides of the center of the rectangular slide groove 101. Rectangular sliding blocks 3 are provided on the outer sides of the two fixing blocks 102. Guide rods 2 are fixedly connected between the outer sides of the two fixing blocks 102 and the two end faces of the rectangular slide groove 101, respectively. Guide holes 301 are provided on the two rectangular sliding blocks 3. The two guide rods 2 pass through the guide holes 301 on the two rectangular sliding blocks 3, respectively. Springs 201 are provided on the outer sides of the two guide rods 2 and between the two end faces of the rectangular slide groove 101 and the outer sides of the two rectangular sliding blocks 3, so that when the rectangular sliding blocks 3 move along the rectangular slide groove 101, they are guided by sliding along the guide rods 2 through the guide holes 301 to ensure the stability of the sliding of the rectangular sliding blocks 3. When the rectangular sliding blocks 3 move, they compress the springs 201, so that when the rectangular sliding blocks 3 are no longer under force, they are reset by the restoring force of the springs 201.

[0024] Please see Figure 2-4 On both sides of the middle of the upper surface of the placement platform 1, there are strip openings 103. The upper ends of the two rectangular sliding blocks 3 are fixedly connected to the connecting blocks 304. The upper ends of the two connecting blocks 304 extend out of the upper surface of the placement platform 1 through the two strip openings 103 and are fixedly connected to the U-shaped clamping rods 4. The front and rear ends of the inner sides of the two U-shaped clamping rods 4 are fixedly connected to the triangular clamping blocks 401. By pulling the U-shaped clamping rods 4 outward, the U-shaped clamping rods 4 drive the connecting blocks 304 to slide along the strip openings 103, and then the connecting blocks 304 drive the rectangular sliding blocks 3 to move.

[0025] Please see Figure 2-4 Two rectangular sliding blocks 3 are fixedly connected to the inner sides of each other with linkage bars 302. Each linkage bar 302 has a strip-shaped toothed portion 303 fixedly connected to its inner end face. A fixed shaft 5 is fixedly connected to the center of the rectangular slide groove 101. A linkage gear 501 is rotatably connected to the fixed shaft 5. The strip-shaped teeth 303 on the inner sides of the two linkage bars 302 mesh with the teeth at the front and rear ends of the linkage gear 501, respectively. When a U-shaped clamping rod 4 is pulled outwards, it moves the rectangular sliding block 3 at its lower end, causing the rectangular sliding block 3 to move, thus driving the linkage bar 3 on its upper side. 02 moves, causing the linkage bar 302 to drive the linkage gear 501 to rotate, which in turn causes the linkage gear 501 to synchronously drive another linkage bar 302 to move. Through the connection, the two U-shaped clamps 4 move outward synchronously. After the circuit board is placed on the upper surface of the placement platform 1, the U-shaped clamps 4 are released, and the two rectangular sliding blocks 3 are pushed by the two springs 201 respectively, so that the two U-shaped clamps 4 clamp the two sides of the circuit board. The inclined end face of the triangular clamp 401 presses down on the two sides of the circuit board, so that the circuit board is stably clamped on the upper surface of the placement platform 1.

[0026] Please see Figure 1 and Figure 3 Rubber pads 402 are fixedly installed on the inner inclined end faces of the two triangular clamps 401. The rubber pads 402 separate the side of the circuit board from the triangular clamps 401 to prevent the triangular clamps 401 from clamping too much force and damaging the circuit board.

[0027] Working Principle: During use, the operator pulls either U-shaped clamp 4 outward. This action, through the linkage mechanism of connecting block 304 and rectangular sliding block 3, allows both U-shaped clamps 4 to move outward simultaneously and synchronously. This design utilizes the meshing relationship between linkage bar 302, toothed section 303, and linkage gear 501 to ensure convenient and synchronized operation. During the outward movement of the U-shaped clamp 4, the rectangular sliding block 3 slides along guide rod 2 and compresses spring 201, storing restoring force for subsequent clamping actions. Subsequently, the operator places the circuit board to be tested on the upper surface of the placement platform 1. After confirming that the circuit board is in the correct position, the operator releases the U-shaped clamp 4. At this time, the restoring force of spring 201 pushes the rectangular sliding block 3 inward, thereby causing the U-shaped clamp 4 and its inner triangular clamp 401 to move inward. The rubber pad 402 on the inner side of the triangular clamp 401 makes close contact with the edge of the circuit board, achieving a stable and safe clamping effect. This design not only allows circuit boards of different sizes to be effectively secured, but also protects the circuit boards from potential damage during clamping through the rubber pad 402. At this point, the circuit board is stably clamped on the placement platform 1, ready for subsequent resistance value testing.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A product resistance value testing fixture, comprising a placement stage (1), characterized in that: A rectangular slide groove (101) is provided in the middle of the interior of the placement platform (1). Fixing blocks (102) are fixedly connected to both sides of the middle of the rectangular slide groove (101). A rectangular sliding block (3) is provided on the outer side of the two fixing blocks (102). A strip opening (103) is provided on both sides of the middle of the upper surface of the placement platform (1). A connecting block (304) is fixedly connected to the upper end of the two rectangular sliding blocks (3). The upper ends of the two connecting blocks (304) extend out of the upper surface of the placement platform (1) through the two strip openings (103) and are fixedly connected to U-shaped clamping rods (4). Triangular clamping blocks (401) are fixedly connected to the front and rear ends of the inner sides of the two U-shaped clamping rods (4).

2. The product resistance value testing fixture according to claim 1, characterized in that: Guide rods (2) are fixedly connected to the outer sides of the two fixed blocks (102) and the two end faces of the rectangular slide groove (101), respectively. Guide through holes (301) are provided on the two rectangular sliding blocks (3).

3. The product resistance value testing fixture according to claim 2, characterized in that: The two guide rods (2) pass through the guide holes (301) on the two rectangular sliding blocks (3) respectively. Springs (201) are provided on the outer side of the two guide rods (2) and between the two end faces of the rectangular slide groove (101) and the outer side of the two rectangular sliding blocks (3).

4. The product resistance value testing fixture according to claim 1, characterized in that: Both rectangular sliding blocks (3) are fixedly connected to the inner side of a linkage bar (302), and both linkage bars (302) are fixedly connected to the inner end face of a strip tooth (303).

5. A product resistance value testing fixture according to claim 4, characterized in that: A fixed shaft (5) is fixedly connected to the center of the rectangular slide (101), and a linkage gear (501) is rotatably connected to the fixed shaft (5).

6. A product resistance value testing fixture according to claim 5, characterized in that: The toothed portions (303) on the inner sides of the two linkage bars (302) respectively mesh with the teeth at the front and rear ends of the linkage gear (501).

7. A product resistance value testing fixture according to claim 1, characterized in that: Rubber pads (402) are fixedly provided on the inner inclined end surfaces of the two triangular clamping blocks (401).

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