PCB test fixture

Abstract

The utility model discloses a PCB test fixture, which relates to the technical field of fixtures and comprises an adjusting frame, two adjusting fixtures are slidably arranged on the adjusting frame and can slide in the adjusting frame, and two ends of each adjusting fixture are movably connected to the edge of the adjusting frame. An edge limiting mechanism is arranged between the ends, connected with the edge of the same side of the adjusting frame, of the two adjusting clamps; the beneficial effects of the utility model are that the movable adjusting clamp is used for clamping PCBs with different sizes, then the edge limiting mechanism is used for limiting the edge of the upper end surface of the PCB, and then the PCB is slightly lifted without changing the deflection condition of the lifting plate by adjusting the adjusting head, so that the upper end surface of the PCB can be located on a detection plane, and the detection precision is improved. Waiting for subsequent testing; the device can adapt to clamping work of plates of different sizes, meanwhile, the positions of the plates are not adjusted according to different thicknesses of the plates, and deviation between the to-be-tested faces of the plates and the detection plane is avoided.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a PCB test fixture. Background Technology

[0002] As a commonly used electronic component, the PCB board has a large number of circuits and electrical connection points. Therefore, the continuity of the circuits on the PCB directly affects the operation of the entire electrical equipment. Thus, after the PCB is manufactured, it needs to be electrically tested. The existing testing method is to fix the PCB board on the testing instrument and then test each connection point with probes. Therefore, the clamping speed and accuracy of the PCB board directly affect the testing efficiency and accuracy. The existing testing instruments have low clamping efficiency. Utility Model Content

[0003] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application. Such simplifications or omissions shall not be used to limit the scope of this utility model.

[0004] In view of the problems existing in the above or prior art, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a PCB test fixture that solves the problem of low clamping efficiency of existing test instruments.

[0006] To solve the above technical problems, this utility model provides the following technical solution: a PCB test fixture, which includes an adjustment frame, two adjustment clamps slidably disposed on the adjustment frame, the adjustment clamps being slidable inside the adjustment frame, and the two ends of the adjustment clamps being movably connected to the edge of the adjustment frame; an edge limiting mechanism is provided between the ends of the two adjustment clamps connected to the same edge of the adjustment frame;

[0007] The adjusting fixture includes a movable bar, which is placed inside the adjusting frame. The two ends of the movable bar slide along the edge of the adjusting frame via sliding heads. A locking block is provided on the bottom center of the sliding head. Placement grooves are provided on both sides of the movable bar, and deflectable lifting plates are provided within these grooves. The sliding head is fixed to the edge of the adjusting frame by fastening bolts. An adjusting mechanism is provided within the movable bar and the sliding head. An internal long rod is provided on the inner wall of the movable bar, and both ends of the internal long rod are fixed to the inner wall of the adjusting frame.

[0008] As a preferred embodiment of the PCB test fixture of this utility model, the adjustment frame is provided with a longitudinal adjustment groove on the edge where it connects to the adjustment fixture, and the locking block is slidably placed in the longitudinal adjustment groove; the fastening bolt passes through the side of the sliding head and the side of the adjustment frame for fixation; the side of the longitudinal adjustment groove is provided with a transverse adjustment groove.

[0009] As a preferred embodiment of the PCB test fixture of this utility model, the edge limiting mechanism includes a mounting block, a central adjustment groove is provided in the middle of the mounting block, a side groove is provided on the inner wall of the central adjustment groove, and a bottom groove is provided on the bottom surface of the central adjustment groove.

[0010] The edge limiting mechanism also includes a limiting plate. One side of the limiting plate is connected to a sliding connecting head. Both ends of the sliding connecting head are placed in the side groove. The other side of the sliding connecting head is slidably placed in the bottom groove through a sliding protrusion. The inner wall side of the bottom groove facing the inside of the adjusting frame is provided with a head; the side of the sliding protrusion is provided with a slot.

[0011] In a preferred embodiment of the PCB test fixture of this utility model, the adjustment mechanism includes a first gear, which is located at one end of a first roller, and the other end of the first roller is movably connected to the inner wall of the adjustment frame; the first gear meshes with a second gear; one side of the second gear is movably connected to the outer wall of the sliding head, and the other side of the second gear is provided with an adjustment head;

[0012] The lower end of the lifting plate is connected to one end of the pull rope, and the pull rope is connected to the first roller after passing around the second roller;

[0013] The inner side of the raised plate is connected to one side of the internal long rod by a spring.

[0014] In a preferred embodiment of the PCB test fixture described in this utility model, when no PCB board is installed between the adjusting fixtures, the spring on the inner side of the lifting plate is in a compressed state.

[0015] The beneficial effects of this utility model are as follows: This utility model uses a movable adjustable clamp to clamp PCBs of different sizes, and then uses an edge limiting mechanism to limit the edge of the upper surface of the PCB. Then, by adjusting the adjusting head, the deflection of the lifting plate is changed, and the PCB is slightly raised so that the upper surface of the PCB can be located on the detection plane, waiting for subsequent testing.

[0016] The device can accommodate plates of different sizes and adjust their position according to their thickness to avoid deviation between the test surface and the detection plane. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of 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. Wherein:

[0018] Figure 1 This is an overall schematic diagram of the PCB test fixture;

[0019] Figure 2 A schematic diagram of the adjustment frame for a PCB test fixture;

[0020] Figure 3 This is a schematic diagram of the adjustment fixture for the PCB test fixture;

[0021] Figure 4 This is a schematic diagram of the bottom structure of the adjustment fixture for the PCB test fixture.

[0022] Figure 5 This is a schematic diagram of the internal structure of the adjustment fixture of the PCB test fixture;

[0023] Figure 6 A schematic diagram of the edge limiting mechanism of a PCB test fixture;

[0024] Figure 7 This is a breakdown diagram of the edge limiting mechanism of the PCB test fixture.

[0025] Marked in the image:

[0026] 100. Adjusting frame; 200. Adjusting clamp; 300. Edge limiting mechanism; 101. Placement opening; 102. Longitudinal adjustment groove; 103. Lateral adjustment groove; 201. Movable bar; 202. Sliding head; 203. Lifting plate; 204. Placement groove; 205. Locking block; 206. Fastening bolt; 207. Adjusting mechanism; 208. Internal long rod; 301. Mounting block; 302. Limiting plate; 303. Sliding connecting head; 304. Sliding protrusion; 305. Middle adjustment groove; 306. Side groove; 307. Bottom groove; 308. Locking head; 309. Locking slot; 207a. First gear; 207b. Second gear; 207c. Adjusting head; 207d. First roller; 207e. Second roller; 207f. Pull rope; 207g. Spring. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0030] Example 1

[0031] Reference Figures 1-5 This is the first embodiment of the present invention. This embodiment provides a PCB test fixture, which includes an adjustment frame 100. Two adjustment clamps 200 are slidably disposed on the adjustment frame 100. The adjustment clamps 200 are slidable inside the adjustment frame 100. The two ends of the adjustment clamps 200 are movably connected to the edge of the adjustment frame 100. An edge limiting mechanism 300 is provided between the ends of the two adjustment clamps 200 connected to the same edge of the adjustment frame 100.

[0032] The adjusting clamp 200 includes a movable bar 201, which is placed inside the adjusting frame 100. The two ends of the movable bar 201 are slidably mounted on the edge of the adjusting frame 100 via sliding heads 202. A locking block 205 is provided on the bottom surface of the middle part of the sliding head 202. Placement grooves 204 are provided on both sides of the movable bar 201, and a deflectable lifting plate 203 is provided in the placement grooves 204. The sliding head 202 is fixed to the edge of the adjusting frame 100 by fastening bolts 206. An adjusting mechanism 207 is provided inside the movable bar 201 and the sliding head 202. An internal long rod 208 is provided on the inner wall of the movable bar 201, and the two ends of the internal long rod 208 are fixed to the inner wall of the adjusting frame 100.

[0033] A longitudinal adjustment groove 102 is provided on the edge where the adjustment frame 100 connects to the adjustment clamp 200, and the locking block 205 is slidably placed in the longitudinal adjustment groove 102; the fastening bolt 206 passes through the side of the sliding head 202 and the side of the adjustment frame 100 for fixing; a transverse adjustment groove 103 is provided on the side of the longitudinal adjustment groove 102.

[0034] Preferably, the lateral adjustment groove 103 extends through the edge of the adjustment frame 100.

[0035] The edge limiting mechanism 300 includes a mounting block 301, a central adjustment groove 305 in the middle of the mounting block 301, a side groove 306 on the inner wall of the central adjustment groove 305, and a bottom groove 307 on the bottom surface of the central adjustment groove 305.

[0036] The edge limiting mechanism 300 also includes a limiting plate 302. One side of the limiting plate 302 is connected to a sliding connecting head 303. Both ends of the sliding connecting head 303 are placed in the side groove 306. The other side of the sliding connecting head 303 is slidably placed in the bottom groove 307 through a sliding protrusion 304. A head 308 is provided on the inner wall side of the bottom groove 307 facing the inside of the adjusting frame 100. A groove 309 is provided on the side of the sliding protrusion 304.

[0037] Preferably, the bottom surface of the limiting plate 302 is flush with the upper plane of the adjusting frame 100, and the upper plane of the adjusting frame 100 is the detection plane.

[0038] The adjusting mechanism 207 includes a first gear 207a, which is located at one end of a first roller 207d, and the other end of the first roller 207d is movably connected to the inner wall of the adjusting frame 100; the first gear 207a meshes with a second gear 207b; one side of the second gear 207b is movably connected to the outer wall of the sliding head 202, and the other side of the second gear 207b is provided with an adjusting head 207c;

[0039] Preferably, the size of the second gear 207b is smaller than that of the first gear 207a. There is a certain damping at the connection between the second gear 207b and the sliding head 202, which can be rotated manually using the adjusting head 207c. However, the first roller 207d cannot rotate the second gear 207b through the first gear 207a.

[0040] The lower end of the lifting plate 203 is connected to one end of the pull rope 207f, and the pull rope 207f passes around the second roller 207e and is then connected to the first roller 207d;

[0041] The inner side of the lifting plate 203 is connected to one side of the internal long rod 208 via a spring 207g.

[0042] When no PCB board is installed between the adjusting clamps 200, the spring 207g inside the lifting plate 203 is in a compressed state.

[0043] Preferably, when adjusting the adjusting clamp 200, the locking block 205 slides within the longitudinal adjusting groove 102, while the first roller 207d also slides along the transverse adjusting groove 103.

[0044] Preferably, the bottom surfaces of the placement opening 101 and the placement groove 204 are flush.

[0045] It should be noted that the placement port 101 can be equipped with a structure consistent with the adjustment mechanism 207, so that three plates can be clamped between the adjustment frame 100 and the adjustment fixture 200 for testing.

[0046] In use, first move the limiting plate 302 outward, adjust the distance between the adjusting clamps 200 according to the size of the plate, then install the plate between the adjusting clamps 200, and fix the position of the adjusting clamps 200 with the fastening bolts 206. Then slowly adjust the adjusting head 207c and slowly adjust the lifting plate 203 so that the upper surface of the plate is in contact with the bottom surface of the limiting plate 302. Then test it.

[0047] In summary, the device uses a movable adjustable clamp 200 to clamp PCBs of different sizes, then uses an edge limiting mechanism 300 to limit the edge of the upper surface of the PCB, and then adjusts the adjustment head 207c to change the deflection of the lifting plate 203, slightly raising the PCB so that the upper surface of the PCB can be located on the detection plane, waiting for subsequent testing.

[0048] The device can accommodate plates of different sizes and adjust their position according to their thickness to avoid deviation between the test surface and the detection plane.

[0049] 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. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A PCB test fixture, characterized in that: include, An adjusting frame (100) is provided, on which two adjusting clamps (200) are slidably provided. The adjusting clamps (200) are slidable inside the adjusting frame (100), and the two ends of the adjusting clamps (200) are movably connected to the edge of the adjusting frame (100). An edge limiting mechanism (300) is provided between the ends of the two adjusting clamps (200) connected to the same edge of the adjusting frame (100). The adjusting clamp (200) includes a movable bar (201) placed inside the adjusting frame (100); the two ends of the movable bar (201) are slidably mounted on the edge of the adjusting frame (100) via sliding heads (202); a locking block (205) is provided on the bottom surface of the middle part of the sliding head (202); placement grooves (204) are provided on both sides of the movable bar (201), and a deflectable lifting plate (203) is provided in the placement groove (204); the sliding head (202) is fixed to the edge of the adjusting frame (100) by fastening bolts (206); an adjusting mechanism (207) is provided in the movable bar (201) and the sliding head (202); an internal long rod (208) is provided on the inner wall of the movable bar (201), and the two ends of the internal long rod (208) are fixed to the inner wall of the adjusting frame (100).

2. The PCB test fixture as described in claim 1, characterized in that: The adjusting frame (100) is provided with a longitudinal adjusting groove (102) on the edge where it connects with the adjusting clamp (200), and the locking block (205) is slidably placed in the longitudinal adjusting groove (102); the fastening bolt (206) passes through the side of the sliding head (202) and the side of the adjusting frame (100) for fixation; the side of the longitudinal adjusting groove (102) is provided with a transverse adjusting groove (103).

3. The PCB test fixture as described in claim 1, characterized in that: The edge limiting mechanism (300) includes a mounting block (301), the mounting block (301) has a central adjustment groove (305) in the middle, the inner wall of the central adjustment groove (305) has a side groove (306), and the bottom surface of the central adjustment groove (305) has a bottom groove (307). The edge limiting mechanism (300) further includes a limiting plate (302), one side of which is connected to a sliding connecting head (303). Both ends of the sliding connecting head (303) are placed in the side groove (306), and the other side of the sliding connecting head (303) is slidably placed in the bottom groove (307) through a sliding protrusion (304). The inner wall side of the bottom groove (307) facing the inside of the adjusting frame (100) is provided with a head (308); the side of the sliding protrusion (304) is provided with a slot (309).

4. The PCB test fixture as described in claim 1, characterized in that: The adjusting mechanism (207) includes a first gear (207a), which is located at one end of a first roller (207d), and the other end of the first roller (207d) is movably connected to the inner wall of the adjusting frame (100); the first gear (207a) meshes with a second gear (207b); one side of the second gear (207b) is movably connected to the outer wall of the sliding head (202), and the other side of the second gear (207b) is provided with an adjusting head (207c); The lower end of the lifting plate (203) is connected to one end of the pull rope (207f), and the pull rope (207f) passes around the second roller (207e) and is then connected to the first roller (207d); The inner side of the lifting plate (203) is connected to one side of the internal long rod (208) by a spring (207g).

5. The PCB test fixture as described in claim 4, characterized in that: When no PCB board is installed between the adjusting clamps (200), the spring (207g) inside the lifting plate (203) is in a compressed state.

Images