Universal clamp for random vibration test of circuit board assembly

Abstract

The utility model discloses a circuit board assembly random vibration test universal clamp in the field of charging and discharging equipment and test equipment, and the clamp comprises a clamp frame, the clamp frame is horizontally and slidably connected with a plurality of moving strips, and each moving strip is vertically and slidably connected with a plurality of moving blocks used for fixing a circuit board assembly. The clamp in the scheme can be adapted to different circuit board assemblies, and is beneficial to assisting the vibration test of the circuit board assembly and preventing the circuit board assembly from falling off.

Description

Technical Field

[0001] The utility model relates to the field of charging and discharging equipment and testing equipment, in particular to a universal fixture for random vibration testing of circuit board components. Background Art

[0002] Circuit boards (charging and discharging boards, measuring boards, protection boards, etc.) are installed inside charging and discharging equipment and testing equipment. In order to improve the reliability of the equipment, components need to be screened for board-level environmental stress using a random vibration test. The purpose is to eliminate potential defects in components, eliminate early failures, improve the reliability of delivered products, and avoid degradation of product performance or shortened service life due to component defects.

[0003] To conduct random vibration test on the circuit board, it needs to be installed on the fixture. However, since there are many uneven components installed on the circuit board and it is not suitable for force, it can only be installed and supported through the mounting holes on the circuit board assembly, such as Figure 1 As shown, the existing random vibration test fixture for circuit board components is designed for a single model size and mounting hole size. Each circuit board is designed with a fixture, which can only be used one-to-one and cannot be universal. This has two problems: first, a large amount of space is required to store various types of fixtures, which wastes resources and requires special personnel to manage; second, it wastes manpower and material resources and increases product design costs and manufacturing costs. Utility Model Content

[0004] The utility model aims to provide a universal fixture for random vibration test of circuit board components, so as to solve the problem that the existing circuit board vibration test fixture has a single applicable size.

[0005] The universal fixture for random vibration test of circuit board assemblies in this scheme comprises a fixture frame, on which a plurality of moving bars are horizontally slidably connected, and on each of the moving bars a plurality of moving blocks for fixing the circuit board assemblies are vertically slidably connected.

[0006] The working principle and beneficial effects of this solution: The universal fixture for random vibration test of circuit board assemblies can be adjusted steplessly through the horizontal moving bar and vertical moving block inside the fixture to adapt to the clamping of circuit boards with different outer dimensions, different mounting hole distances, and indefinite number of mounting holes. It is easy to clamp and reliably fix, and can meet the requirements of environmental stress screening (random vibration) tests for electronic products. It is convenient to clamp circuit board assemblies of different sizes. The fixture in this solution reduces the design cost and manufacturing cost of the equipment and improves the market competitiveness of the product. In actual use, based on 30 new models of products per year, 30 sets of fixtures need to be designed and produced, each set of fixtures costs 10,000 yuan, totaling 300,000 yuan. However, only one newly designed fixture needs to be produced, and one fixture costs 20,000 yuan, which can adapt to circuit board assemblies of different sizes, saving 280,000 yuan. Compared with the prior art, this application can match different circuit board assemblies, and better fix multiple positions of circuit board assemblies, which is convenient for vibration testing of circuit board assemblies.

[0007] Furthermore, the clamp frame is provided with two slide grooves, which are symmetrically arranged, and the two ends of the moving bar are respectively slidably connected in the two slide grooves. This arrangement enables the moving bar to move more smoothly in the clamp frame.

[0008] Furthermore, a plurality of screws are arranged in the slide groove, and the screws abut against the moving bar, and the moving bar is fixed by the screws.

[0009] Furthermore, the moving bar is provided with a through slot, and the moving block is slidably connected in the through slot, so that the moving block can slide smoothly.

[0010] Furthermore, the moving block is provided with bolts, and the bolts are matched with nuts. This arrangement is convenient for locating the position of the moving block. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A fixture in the prior art;

[0012] Figure 2 This is a schematic diagram of the structure of a universal fixture for random vibration test of a circuit board assembly of the utility model;

[0013] Figure 3 for Figure 2 Schematic diagram of usage. DETAILED DESCRIPTION

[0014] The following is a further detailed description through specific implementation methods:

[0015] The reference numerals in the drawings of the specification include: existing fixture 1, circuit board assembly 2, support column 3, fixture frame 401, moving bar 402, slide slot 403, screw 404, through slot 405, bolt 406, nut 407.

[0016] The fixture in the prior art is Figure 1 As shown, the existing clamp 1 uses the support column 3 to fix the circuit board assembly 2.

[0017] The embodiment is basically as shown in the attached Figure 2 and Figure 3 As shown: a universal fixture for random vibration test of circuit board assembly 2, including a fixture frame 401, wherein the fixture frame 401 is provided with two slide grooves 403, the two slide grooves 403 are symmetrically arranged, three moving bars 402 are slidably connected between the two slide grooves 403, three screws 404 are provided in each slide groove 403, the screws 404 are M6 non-slip screws 404, the screws 404 abut the moving bars 402, the moving bars 402 are provided with through grooves 405, three moving blocks are slidably connected in each through groove 405, the moving blocks are provided with bolts 406, and the bolts 406 are matched with nuts 407.

[0018] The universal fixture for random vibration test of circuit board assembly 2 can be adjusted steplessly through the horizontal moving bar 402 and the vertical moving block inside the fixture to adapt to the clamping of circuit boards with different external dimensions, different installation hole distances, and indefinite number of installation holes. The moving bar 402 is fixed by screws 404 for convenient operation, and the moving block is fixed by bolts 406 and nuts 407 for convenient clamping. This disassembly method is convenient for clamping and reliable, and can meet the requirements of environmental stress screening (random vibration) test of electronic products. It is convenient to clamp circuit board assemblies 2 of different sizes. The fixture in this scheme reduces the design cost and manufacturing cost of the equipment and improves the market competitiveness of the product. In actual use, according to 30 new models of products per year, 30 sets of fixtures need to be designed and produced, each set of fixture costs 10,000 yuan, and the total is 300,000 yuan. However, only one new design fixture needs to be produced, and one fixture costs 20,000 yuan, which can adapt to circuit board assemblies 2 of different sizes, saving 280,000 yuan.

[0019] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Universal fixture for random vibration test of circuit board components, characterized by: The invention comprises a fixture frame, on which a plurality of moving bars are horizontally slidably connected, and on each of the moving bars a plurality of moving blocks for fixing the circuit board assembly are vertically slidably connected.

2. The universal fixture for random vibration test of circuit board assembly according to claim 1, characterized in that: The clamp frame is provided with two slide grooves, which are symmetrically arranged, and the two ends of the moving bar are respectively slidably connected in the two slide grooves.

3. The universal fixture for random vibration test of circuit board assembly according to claim 2, characterized in that: A plurality of screws are arranged in the slide groove, and the screws abut against the moving strip.

4. The universal fixture for random vibration test of circuit board assembly according to claim 3, characterized in that: The moving bar is provided with a through slot, and the moving block is slidably connected in the through slot.

5. The universal fixture for random vibration test of circuit board assembly according to claim 4, characterized in that: The moving block is provided with bolts, and the bolts are matched with nuts.

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