PCB test strip precision clamp and test system

Abstract

The utility model provides a PCB test strip precision clamp and a test system. The PCB test strip precision clamp comprises a support positioning mechanism; a positioning pin is arranged on the bottom plate; and the press-fit fixing mechanism comprises a pressing plate and an elastic extrusion piece, the pressing plate can move in a lifting mode, and the elastic extrusion piece is connected to the pressing plate. According to the utility model, to-be-clamped PCB slices in the device can be positioned, so that processing holes of a plurality of to-be-clamped PCB slices can be positioned on the same straight line, the purpose of performing batch hole-forming detection on the plurality of to-be-clamped PCB slices can be realized, and meanwhile, displacement deviation or warping of the plurality of to-be-clamped PCB slices in the moving or stacking process can be avoided, and the detection accuracy is improved. Therefore, the stability of the to-be-clamped PCB slice in the pressing space and the subsequent processing precision are ensured. Therefore, the method has the remarkable advantages of being convenient to operate, high in positioning precision, wide in application range, high in controllability, high in product yield, capable of improving the detection efficiency and the like, and has wide application prospects in the industry.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fixture, specifically refers to a kind of PCB test strip precision fixture and test system. BACKGROUND

[0002] In PCB production, test strip (Coupon) is a small-sized PCB specially designed, which contains the same or similar features as actual PCB, such as holes, lines and pads, etc., for evaluating and verifying the parameters and process of production process.

[0003] With the progress of technology, the design of PCB is becoming more and more complex, and the size and precision requirements of test strip holes are also increasing. However, the existing PCB slice test strip hole quality detection technology is facing a series of challenges. At present, the fixture used in the detection process often cannot accurately ensure that all the holes on the PCB slice are strictly located on the same straight line, which seriously limits the realization of high-precision batch detection.

[0004] The existing fixture mainly includes acrylic sheet fixture, plastic balance clamp and tripod sample clamp, etc., which are not capable of dealing with the slight deviation of PCB slice. Due to the inconsistency of hole position, the detection equipment is difficult to maintain constant precision when performing batch detection, which leads to large error in detection results. This not only affects the control of product quality, but also increases the rate of rework and unqualified products, thereby increasing the production cost.

[0005] In addition, the existing fixture performs poorly in adapting to PCB slices of different sizes and hole layouts, and frequent adjustment and calibration are required, which not only consumes time and effort, but also is difficult to meet the requirements of high-precision detection. In today's increasingly automated production process, this inefficient detection method has become a bottleneck restricting the production process. SUMMARY

[0006] Therefore, the technical problem to be solved by the utility model is to overcome the problem of insufficient precision of PCB slice in batch hole detection in the prior art, and to provide a PCB test strip precision fixture and test system.

[0007] To solve the above technical problems, the utility model provides a kind of PCB test strip precision clamp, it includes: support positioning mechanism;The bottom plate of support positioning mechanism is the pressing space above, at least two locating pins are equipped on the bottom plate, the locating pin extends towards the pressing space along the thickness direction of the bottom plate, and the at least two locating pins are arranged in the processing hole of the PCB slice to be clamped;Pressing fixed mechanism is arranged above the support positioning mechanism, and it includes pressing plate and multiple elastic extruding pieces, the pressing plate moves up and down along the height direction of the pressing space, multiple elastic extruding pieces are connected to the pressing plate respectively, and move towards / away from the pressing space by the pressing plate, to extrude / release the PCB slice to be clamped.

[0008] In an embodiment of the utility model, the support positioning mechanism includes at least one support column, one end of the support column is connected to the bottom plate, and the other end extends towards the pressing plate to support the pressing plate.

[0009] In an embodiment of the utility model, the support column is provided with a plug-in slot, the plug-in slot is recessed inwardly arranged from one end of the support column towards the pressing plate;The pressing fixed mechanism further includes at least one plug-in piece, and the plug-in piece can be arranged in the plug-in slot.

[0010] In an embodiment of the utility model, the support positioning mechanism includes two support columns, and the two support columns are arranged on opposite sides of the bottom plate, and any one end of the support column is connected to the bottom plate, and the other end extends towards the pressing plate to support the pressing plate.

[0011] In an embodiment of the utility model, the pressing plate, the support column and the bottom plate are all provided with scales, and the scales are arranged along the length and / or width and / or height direction of the PCB slice to be clamped.

[0012] In an embodiment of the utility model, the pressing fixed mechanism includes three elastic extruding pieces, and the three elastic extruding pieces are respectively located on three vertices of a triangle on the pressing plate.

[0013] In an embodiment of the utility model, the elastic extruding piece includes an assembly block, a spring and a pressing piece, the assembly block is connected to the pressing plate, one end of the spring is fixedly connected to the pressing plate, the other end extends towards the pressing space, and is connected to the pressing piece, and the pressing piece can be extruded with the PCB slice to be clamped.

[0014] In an embodiment of the utility model, the elastic extruding piece further includes a flexible connecting rod, the flexible connecting rod extends along the height direction of the pressing space, and both ends of the flexible connecting rod are connected to the pressing plate and the pressing piece respectively, and the spring is arranged around the flexible connecting rod.

[0015] The utility model still provides a kind of PCB test strip precision test system, it includes the PCB test strip precision fixture of above.

[0016] In an embodiment of the utility model, the PCB test strip precision test system further comprises a glue injection device and a grinding detection device, the PCB test strip precision fixture can be placed in the glue injection device, and the detected PCB slice group after glue injection can be placed in the grinding detection device.

[0017] The above technical solution of the utility model has the following advantages compared with the prior art:

[0018] The PCB test strip precision fixture and test system, by supporting positioning mechanism, the machining holes of multiple PCB slices to be clamped can be located on the same straight line, so that batch hole detection of multiple PCB slices to be clamped can be realized, and the pressing and fixing mechanism can also extrude and fix the PCB slices to be clamped, so that displacement deviation or warping of multiple PCB slices to be clamped during movement or stacking can be avoided, and the stability of the PCB slices to be clamped in the pressing space and the subsequent processing precision can be ensured. Compared with the conventional fixture at the present stage, the present application can realize accurate positioning of multiple PCB slices to be clamped without frequent adjustment and calibration, so as to have the advantages of easy operation, high positioning accuracy, wide application range, high controllability, high product yield and improved detection efficiency, and has broad application prospect in the industry. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the content of the utility model more easily understood, the utility model will be further described in detail in combination with the drawings according to the specific embodiments of the utility model.

[0020] Figure 1 is the three-dimensional structure schematic diagram of the PCB test strip precision fixture in the preferred embodiment of the utility model;

[0021] Figure 2 is Figure 1 the structure schematic diagram of another view of the PCB test strip precision fixture shown.

[0022] DESCRIPTION OF THE DRAWINGS: 100, supporting positioning mechanism; 110, bottom plate; 120, supporting column; 121, plug-in slot; 130, positioning pin; 200, pressing and fixing mechanism; 210, pressing plate; 220, elastic extrusion piece; 221, assembly block; 222, spring; 223, pressing piece; 224, flexible connecting rod; 230, plug-in piece; 300, PCB slice to be clamped. DETAILED DESCRIPTION

[0023] The utility model is further described below in combination with the drawings and specific embodiments, so that those skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0024] Embodiment one

[0025] Referring to Figure 1 As shown in the figure, the embodiment provides a PCB test strip precision clamp, which comprises: a support positioning mechanism 100; the bottom plate 110 of the support positioning mechanism 100 is provided with at least two positioning pins 130, the positioning pins 130 extend towards the pressing space along the thickness direction of the bottom plate 110, and the at least two positioning pins 130 are arranged in the machining holes of the PCB slices 300 to be clamped; a pressing fixing mechanism 200 is arranged above the support positioning mechanism 100, which comprises a pressing plate 210 and a plurality of elastic extrusion pieces 220, the pressing plate 210 moves up and down along the height direction of the pressing space, and the plurality of elastic extrusion pieces 220 are connected to the pressing plate 210 and move towards / away from the pressing space through the pressing plate 210 to extrude / release the PCB slices 300 to be clamped.

[0026] The PCB test strip precision clamp described in the embodiment can position the PCB slices 300 to be clamped inside through the support positioning mechanism 100, so that the machining holes of the plurality of PCB slices 300 to be clamped can be located on the same straight line, thereby achieving the purpose of batch hole detection of the plurality of PCB slices 300 to be clamped. At the same time, the pressing fixing mechanism 200 can also extrude and fix the PCB slices 300 to be clamped, thereby ensuring that the plurality of PCB slices 300 to be clamped will not be displaced or warped during movement or stacking, and further ensuring the stability of the PCB slices 300 to be clamped in the pressing space and the subsequent processing precision. Compared with the conventional clamp at the present stage, the application can realize accurate positioning of the plurality of PCB slices 300 to be clamped without frequent adjustment and calibration, thereby having the advantages of convenient operation, high positioning accuracy, wide application range, high controllability, high product yield, and improved detection efficiency, etc. It has broad application prospects in the industry.

[0027] Referring to Figure 1As shown, in the embodiment, the support positioning mechanism 100 can provide support to the pressing and fixing mechanism 200 and the PCB slices 300 to be clamped, and also provide a mounting and connecting platform for the connector 230, thereby realizing positioning and containing of the plurality of PCB slices 300 to be clamped. Correspondingly, the pressing and fixing mechanism 200 in the embodiment is used to press and fix the plurality of mutually stacked PCB slices 300 to be clamped after the support positioning mechanism 100 bears the PCB slices 300 to be clamped, thereby improving the stability of the PCB slices 300 to be clamped in the process of transfer or processing, and achieving the purpose of preventing the PCB slices 300 to be clamped from being warped and deformed.

[0028] As shown in Figure 1 and Figure 2 As shown, in the embodiment, the bottom plate 110 is preferably a flat rectangular plate, and two positioning pins 130 are arranged on the bottom plate 110 and are spaced apart along the length direction of the bottom plate 110, and are used to be arranged in the holes of the PCB slices 300 to be clamped to realize positioning and connection of the plurality of PCB slices 300 to be clamped. It should be noted that the number and spacing of the holes of the PCB slices 300 to be clamped can be correspondingly arranged according to the number and spacing of the positioning pins 130, and in different embodiments, the positioning pins 130 can also be designed to have other numbers or be arranged at other positions according to different actual use requirements, and the utility model does not make specific limitation on this.

[0029] Further, the support positioning mechanism 100 comprises at least one support column 120, one end of the support column 120 is connected to the bottom plate 110, and the other end extends towards the pressing plate 210 to support the pressing plate 210. Specifically, the support positioning mechanism 100 in the embodiment comprises two support columns 120, and the two support columns 120 are arranged on the opposite sides of the length direction of the bottom plate 110, and one end of any support column 120 is connected to the bottom plate 110, and the other end extends towards the pressing plate 210 to support the pressing plate 210. Further, in the embodiment, the plug-in groove 121 is arranged in any support column 120, and the plug-in groove 121 is arranged inwardly recessed from one end of the support column 120 towards the pressing plate 210, and is used to cooperate with the pressing and fixing mechanism 200 to realize fixed connection therebetween.

[0030] Correspondingly, the pressing fixing mechanism 200 in the embodiment also comprises two inserting pieces 230, which are symmetrically arranged at opposite ends of the pressing plate 210 along the length direction of the pressing plate 210, and the inserting pieces 230 can be arranged in the inserting groove 121. Based on the structure, the inserting groove 121 and the inserting piece 230 can guide the actual moving direction of the pressing plate 210 on one hand, so as to ensure that the pressing plate 210 can be pressed and fixed in a direction perpendicular to the to-be-clamped PCB slice 300, thereby avoiding the problem that the to-be-clamped PCB slice 300 is offset due to lateral extrusion caused by lateral deviation. On the other hand, the actual moving distance of the pressing plate 210 can be limited, so as to avoid the problem that the to-be-clamped PCB slice 300 in the extrusion space is damaged due to excessive movement of the pressing plate 210.

[0031] Referring to Figure 1 and Figure 2 , the pressing fixing mechanism 200 in the embodiment comprises three elastic extruding pieces 220, which are respectively arranged at three vertices of a triangle on the pressing plate 210, so as to realize multi-point uniform pressing of the to-be-clamped PCB slice 300. In different embodiments, different numbers or different positions of the elastic extruding pieces 220 can be designed according to the size and shape of the actual to-be-clamped PCB slice 300, and the utility model does not make specific limitation on this.

[0032] Further, the elastic extruding piece 220 in the embodiment comprises an assembling block 221, a spring 222 and a pressing piece 223, the assembling block 221 is connected to the pressing plate 210, one end of the spring 222 is fixedly connected to the pressing plate 210, the other end extends towards the pressing space and is connected to the pressing piece 223, and the pressing piece 223 can be extruded with the to-be-clamped PCB slice 300. Among them, the assembling block 221 is used to fix the spring 222 and the pressing piece 223 on the pressing plate 210, the spring 222 is used to provide a buffering force during pressing, and can also automatically reset the pressing piece 223 after the pressing plate 210 is separated from the to-be-clamped PCB slice 300; the pressing piece 223 is used to directly contact the to-be-clamped PCB slice 300, which is preferably a sheet structure with a large contact area, so as to improve the pressing area and extrusion uniformity. Further, the elastic extruding piece 220 in the embodiment also comprises a flexible connecting rod 224, which extends along the height direction of the pressing space, and the two ends of the flexible connecting rod 224 are respectively connected to the pressing plate 210 and the pressing piece 223, and the spring 222 is arranged around the flexible connecting rod 224. In the embodiment, the compression direction of the spring 222 can be guided based on the arrangement of the flexible connecting rod 224, thereby further improving the clamping precision.

[0033] In addition, in the embodiment, the pressing plate 210, the supporting column 120 and the bottom plate 110 are all provided with scales, and the scales are arranged along the length, width and / or height direction of the to-be-clamped PCB slice 300, so as to facilitate the operator to observe the collinearity and specific position of the plurality of PCB slices in real time.

[0034] Embodiment two

[0035] The embodiment provides a PCB test strip precision testing system, which comprises the PCB test strip precision clamp in the embodiment one. Further, the PCB test strip precision testing system in the embodiment further comprises a glue injection device and a grinding detection device, and the PCB test strip precision clamp can be placed in the glue injection device, and the to-be-detected PCB slice group after glue injection can be placed in the grinding detection device. In the actual detection process, the PCB test strip precision clamp clamping the PCB slice needs to be placed in the glue injection device, and the glue is injected through the acrylic powder, and then the PCB test strip after glue injection is placed in the grinding detection device, so that the holes of the plurality of PCB slices can be ensured to be located on the same straight line, thereby the batch high-precision grinding detection process of the plurality of PCB slices can be realized.

[0036] To sum up, the PCB test strip precision clamp and the testing system have the advantages that the supporting and positioning mechanism 100 is used for positioning the to-be-clamped PCB slice 300 in the clamp, so that the processing holes of the plurality of to-be-clamped PCB slices 300 can be located on the same straight line, thereby the purpose of batch hole detection of the plurality of to-be-clamped PCB slices 300 can be realized, and the pressing and fixing mechanism 200 can also be used for extruding and fixing the to-be-clamped PCB slice 300, so that the displacement deviation or warping of the plurality of to-be-clamped PCB slices 300 in the movement or stacking process can be avoided, and the stability of the to-be-clamped PCB slice 300 in the pressing space and the subsequent processing precision are ensured. Compared with the conventional clamp at the present stage, the application can realize accurate positioning of the plurality of to-be-clamped PCB slices 300 without frequent adjustment and calibration, so that the application has the advantages of convenient operation, high positioning precision, wide application range, high controllability, high product yield and high detection efficiency, and has wide application prospect in the industry.

[0037] Obviously, the above embodiments are only examples for clearly illustrating the application, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments cannot be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the application.

Claims

1. A precision fixture for PCB test strips, characterized in that: include: Support positioning mechanism; Above the base plate of the support positioning mechanism is a pressing space. At least two positioning pins are provided on the base plate. The positioning pins extend toward the pressing space along the thickness direction of the base plate. The at least two positioning pins pass through the processing holes of the PCB slice to be clamped. A pressing and fixing mechanism is disposed above the support and positioning mechanism. It includes a pressure plate and multiple elastic extrusion members. The pressure plate moves up and down along the height direction of the pressing space. The multiple elastic extrusion members are respectively connected to the pressure plate and move toward / away from the pressing space through the pressure plate to squeeze / release the PCB slice to be clamped.

2. The PCB test strip precision fixture according to claim 1, characterized in that: The support positioning mechanism includes at least one support column, one end of which is connected to the base plate and the other end extends toward the pressure plate to support the pressure plate.

3. The PCB test strip precision fixture according to claim 2, characterized in that: The support column is provided with a insertion groove, which is recessed inward from one end of the support column facing the pressure plate; the pressing and fixing mechanism also includes at least one insertion member, which can be inserted into the insertion groove.

4. The PCB test strip precision fixture according to claim 1, characterized in that: The support and positioning mechanism includes two support columns, which are respectively disposed on opposite sides of the base plate. One end of any support column is connected to the base plate, and the other end extends toward the pressure plate to support the pressure plate.

5. The PCB test strip precision fixture according to claim 2, characterized in that: The pressure plate, the support column, and the base plate are all provided with scales, which are set along the length and / or width and / or height of the PCB slice to be clamped.

6. The PCB test strip precision fixture according to claim 1, characterized in that: The pressing and fixing mechanism includes three elastic pressing members, which are located at the three vertices of a triangle on the pressing plate.

7. The precision fixture for PCB test strips according to claim 1, characterized in that: The elastic extrusion component includes an assembly block, a spring, and a pressure plate. The assembly block is connected to the pressure plate. One end of the spring is fixed to the pressure plate, and the other end extends toward the pressing space and is connected to the pressure plate. The pressure plate can be pressed against the PCB slice to be clamped.

8. The precision fixture for PCB test strips according to claim 7, characterized in that: The elastic extrusion member also includes a flexible connecting rod, which extends along the height direction of the pressing space and is connected at both ends to the pressure plate and the pressure sheet, respectively. The spring is arranged around the flexible connecting rod.

9. A precision testing system for PCB test strips, characterized in that: The PCB test strip precision fixture includes any one of claims 1 to 8.

10. The PCB test strip precision testing system according to claim 9, characterized in that: The PCB test strip precision testing system also includes a glue injection device and a grinding and inspection device. The PCB test strip precision fixture can be placed in the glue injection device, and the PCB slice group to be tested after glue injection can be placed in the grinding and inspection device.

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