CN202048869U - A height-limiting jig for detecting the height of the pins on the back of the PCB board - Google Patents

Abstract

The utility model relates to a height-limiting jig for detecting the height of pins on the back surface of a PCB (printed circuit board), which comprises a PCB support consisting of a bottom plate and two side bulges, wherein the inner sides of the bulges on the two sides of the PCB support are provided with supporting surfaces for supporting the PCB; the outer sides of the two convex parts are respectively provided with a guide shaft, guide sliding blocks are respectively arranged on the guide shafts, a reference rod is erected between the two guide sliding blocks, two ends of the reference rod are respectively fixed with a group of vertical guide pillars, the upper ends of the vertical guide pillars are respectively fixed with a connecting block, and a handle is arranged between the two connecting blocks; two movable pressing blocks are respectively arranged between the reference rod and the two connecting blocks and respectively move up and down along the vertical guide pillars, compression springs are respectively arranged between the two movable pressing blocks and the connecting blocks, pressing wheels are respectively arranged on the lower portions of the movable pressing blocks, and hollow portions for the pressing wheels to penetrate through are respectively arranged at two ends of the reference rod. The utility model discloses not only detect fastly, can help the person of detection to judge out the pin of superelevation accurately moreover.

Description

A height-limiting jig for detecting the height of the pins on the back of the PCB board

Technical field:

The utility model relates to the technical field of detection equipment for PCB boards, in particular to a height-limiting jig for detecting the height of pins on the back of a PCB board.

Background technique:

After soldering various electronic components on the PCB board of electronic products, the pins of each electronic component protrude from the back of the PCB board. In order to ensure the smooth installation of the PCB board in subsequent applications, avoid the pins on the back of the PCB board from being If there is improper contact with the mounting object, the protruding height of the pins on the back must be limited. At present, it is generally required that the height of the pins on the back of the PCB should not exceed 2.5±0.1mm. However, due to differences in pin lengths, installation positions, and manual operations of various electronic components, it is impossible to guarantee that all pins are not super high, so it is necessary to detect the height of each pin. Existing inspections mainly rely on manual visual inspection and then use measuring fixtures to further determine whether it is superhigh. This method is not only inefficient but also inaccurate.

Utility model content:

The purpose of the utility model is to overcome the above-mentioned shortcomings of the prior art, and provide a height-limiting jig for detecting the height of the pins on the back of the PCB board, which can quickly detect whether all the pins are super high, not only fast, but also high in accuracy .

The technical solution adopted by the utility model to achieve its purpose is: a height-limiting jig for detecting the height of the pins on the back of the PCB board. The inner side of the raised part on the side has a supporting surface for supporting the PCB board; the outer sides of the two raised parts are respectively equipped with guide shafts, and guide sliders are respectively arranged on the guide shafts, and a reference bar is set up between the two guide sliders. , the two ends of the reference rod are respectively fixedly installed with a group of vertical guide columns, the upper ends of the vertical guide columns are respectively fixedly equipped with connecting blocks, and a handle is installed between the two connecting blocks; two movable pressing blocks are respectively arranged on The reference rod and the two connecting blocks move up and down along the vertical guide columns respectively, and compression springs are respectively arranged between the two movable pressing blocks and the connecting blocks, and pressing wheels are respectively installed on the lower part of the movable pressing blocks , the two ends of the reference rod are respectively provided with hollow parts for the pressure rollers to pass through.

The lower part of the movable pressure block has an extension part extending to the hollow part of the reference rod, and the pressure roller is installed on the extension part through bolts.

The support surface is arranged on a detachable support bar, that is, the support bar is installed inside the raised portion.

The reference rod has a detachable middle section and two side sections plugged with the middle section.

The distance between the protrusions on both sides of the PCB board support is adjustable.

After the utility model adopts the above structure, the distance between the lower surface of the reference rod and the lowermost ends of the two rollers is used as the reference height, and the distance between the lowermost ends of the rollers and the supporting surface is consistent with the thickness of the PCB board to be tested. Place the edges on both sides of the PCB board on the supporting surfaces of the protrusions on both sides of the PCB board bracket, push the handle downwards obliquely, and drive the reference rod to slide along the edge of the PCB board under the guidance of the guide shaft through the connecting block and pressing block. That is, the reference rod slides above the PCB board. If there is a super high pin, it will block the reference rod, so it is easy to judge which pin is super high, and it can be processed quickly and continue to detect; if there is no super high pin, then The reference rod smoothly slides over the entire PCB board, indicating that the tested PCB board is qualified.

Therefore, the utility model not only has a fast detection speed, but also can help the inspector to accurately judge superhigh pins so that they can be processed quickly. In addition, the utility model designs a detachable support bar, a detachable reference rod, and an installation method of a raised portion with an adjustable distance, so that the jig can measure PCB boards of various specifications, and has a wide application range.

Description of drawings:

Fig. 1 is the overall plane structural representation of the utility model;

Fig. 2 is the structural representation of reference bar in the utility model;

Fig. 3 is the structural representation of movable briquetting block and pressure wheel in the utility model;

Fig. 4 is the structural representation of connection block and movable briquetting block in the utility model;

Fig. 5 is a partial enlarged view of A in Fig. 1 .

Detailed ways:

Below in conjunction with specific embodiment and accompanying drawing, the utility model is further described.

As shown in Figures 1 to 5, the fixture for detecting whether the height of the pins on the back of the PCB board is super high according to the utility model includes a PCB board support 1 composed of a bottom plate 11 and two side protrusions 12, the PCB board support 1 The inner sides of the protrusions 12 on both sides have a support surface 120 supporting the PCB; the outer sides of the two protrusions 12 are respectively equipped with guide shafts 121, and the guide shafts 121 are respectively provided with guide sliders 122, and the two guide sliders A reference rod 2 is erected between the blocks 122, and a set of vertical guide posts 21 are fixedly installed at both ends of the reference rod 2 respectively, and a connecting block 3 is fixedly installed on the upper ends of the vertical guide posts 21 respectively, and the two connecting blocks A handle 4 is installed between the 3; two movable pressing blocks 5 are respectively arranged between the reference rod 2 and the two connecting blocks 3 and move up and down along the vertical guide column 21 respectively, and the two movable pressing blocks 5 Compression springs 31 are respectively provided between the connecting block 3 , pressure rollers 51 are respectively installed on the lower part of the movable pressure block 5 , and hollow parts 22 for the pressure rollers 51 to pass through are respectively opened at both ends of the reference rod 2 .

As shown in FIG. 2 , the lower part of the movable pressure block 5 has an extension portion 50 extending to the hollow portion 22 of the reference rod 2 , and the pressure roller 51 is mounted on the extension portion 50 through bolts 52 .

Through the above structure, after placing the PCB board on the supporting surface 120 of the jig, push the handle 4 to drive the connecting block 3 and the reference rod 2 to slide horizontally along the guide shaft 121 through the guide slider 122, and at the same time drive the movable pressing block 5 and the pressure wheel 51 on it slide horizontally. When the pressure wheel 51 contacts the edge of the PCB, under the continuous driving of the handle 4, the pressure wheel 51 will roll on the edge of the PCB, that is, the movable pressure block 5 also rises to a certain height. Thus, the compression spring 31 between the movable pressing block 5 and the connecting block 3 is further compressed, and the compression spring 31 produces a reaction force on the movable pressing block 5, that is, the pressing wheel 51 is tightly pressed against the edge of the PCB board, and the pressing wheel 51 is kept tightly pressed. The purpose of the edge of the PCB board is: because when the edge of the PCB board, especially the large-size PCB board, is placed on the support surface 120, due to its own weight or the influence of the shape of the edge, it is difficult to ensure that the PCB board is in a straight state as a whole, such as the two sides Lifting the middle part of the depression, etc., which will affect the detection accuracy and detection efficiency. Therefore, in the detection process, it is necessary to make sure that the place where the reference rod 2 goes is in a flat state. In the utility model, a pressure block and a pressure wheel that move synchronously with the detection rod are provided. The function makes the contact between the edge of the PCB board and the support surface more sufficient, which is beneficial to ensure that the entire PCB board is in a flat state, and improves the detection accuracy and detection efficiency.

When the reference rod 2 slides above the PCB board, if any pin is super high, it will block the reference rod 2, so it is easy to judge which pin is super high, and it can be processed quickly and continue to detect; if no pin is super high , then the reference rod 2 smoothly slides over the entire PCB board, indicating that the tested PCB board is qualified.

In addition, the utility model can also adjust the jig according to the tested PCB boards of different specifications through the following structure to make it applicable.

For example, the reference rod 2 has a detachable middle section 22 and two side sections 23 plugged with the middle section 22, the two side sections 23 are fixed, and the middle section 22 has various length specifications to choose from Simultaneously, the handle 4 also has various specifications to choose from; The position on the bottom plate 11 can be adjusted flexibly; in this way, according to the width of the PCB board to be tested, first determine the length of the reference rod 2 to be selected, that is, determine the effective length of the middle section 22, and then adjust the protrusions 12 on both sides on the bottom plate 11, so that the distance between the two can support the PCB board under test.

For another example, the support surface 120 is arranged on the detachable support bar 123, that is, the support bar 123 is installed on the inner side of the raised portion 12, and the support bar 123 of different specifications can be replaced so that the support surface 120 reaches the roller 21. The distance between the bottom ends is adjustable, so as to meet the detection requirements of PCB boards with different thicknesses.

To sum up, the utility model not only has a fast detection speed, but also can help the inspector to accurately judge the super-high pins, so that they can be processed quickly. Moreover, the utility model designs installation methods such as detachable reference rods and adjustable distance protrusions, so that the jig can measure PCB boards of various specifications, and has a wide range of applications.

Claims (5)

1. limit for height tool that detects pcb board back side pin height, it is characterized in that: this tool comprises the pcb board support (1) that is made of base plate (11) and both sides lug boss (12), and lug boss (12) inboard of these pcb board support (1) both sides has the supporting surface (120) that supports pcb board; The outside of described two lug bosses (12) is separately installed with the axis of guide (121), be respectively equipped with guide runner (122) on this axis of guide (121), set up a baseline rod (2) between two guide runners (122), described baseline rod (2) two ends are installed with one group of vertical guide pillar (21) respectively, the upper end of described vertical guide pillar (21) is installed with contiguous block (3) respectively, and handle (4) is installed between two contiguous blocks (3); Two movable holddowns (5) are arranged between described baseline rod (2) and two contiguous blocks (3) respectively and move up and down along described vertical guide pillar (21) respectively, and be respectively equipped with compression spring (31) between two movable holddowns (5) and the contiguous block (3), movable holddown (5) bottom also is separately installed with pinch roller (51), and described baseline rod (2) two ends offer the hollow bulb (22) that passes for described pinch roller (51) respectively.

2. a kind of limit for height tool that detects pcb board back side pin height according to claim 1, it is characterized in that: described movable holddown (5) bottom has one and extends to the extension (50) that described baseline rod (2) is gone up hollow bulb (22), and described pinch roller (51) is installed on described extension (50) by bolt (52).

3. a kind of limit for height tool that detects pcb board back side pin height according to claim 1 is characterized in that: described supporting surface (120) is arranged on the removable support bar (123), and promptly described support bar (123) is installed in lug boss (12) inboard.

4. a kind of limit for height tool that detects pcb board back side pin height according to claim 1 is characterized in that: the both sides section (23) that described baseline rod (2) has removable interlude (22) and pegs graft and install with described interlude (22).

5. a kind of limit for height tool that detects pcb board back side pin height according to claim 1 is characterized in that: the distance between the both sides lug boss (12) of described pcb board support (1) is adjustable.

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