Electronic circuit board test fixture

Abstract

The utility model relates to the technical field of circuit board detection, in particular to an electronic circuit board test fixture, which comprises a bottom box and a lower movable plate arranged on the bottom box, limiting nails are fixedly mounted on the bottom box, and the lower movable plate is sleeved on the limiting nails. The limiting nails limit the movement range of the lower movable plate to move up and down in the limiting nails; the lower movable plate is provided with a recess corresponding to the size of the detection circuit board, the lower movable plate is sleeved above and below the limiting nail and is provided with a spring, and the spring provides an upward supporting force for the lower movable plate; the fixing shafts are arranged on the two sides of a pit formed in the lower movable plate, the fixing shafts are sleeved with check blocks, the check blocks rotate to the circuit board with the fixing shafts as the circle center, and manual pressing is changed into pressing controlled by a hydraulic device through cooperation of the limiting nails and the springs. The circuit board and the measuring probe are prevented from being damaged due to unstable pressing force during detection, and the loss is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit board detection technical field, concretely is a kind of electronic circuit board test fixture. BACKGROUND

[0002] The name of circuit board has: ceramic circuit board, alumina ceramic circuit board, aluminum nitride ceramic circuit board, circuit board, PCB board, aluminum substrate, high-frequency board, thick copper plate, impedance board, PCB, super-thin circuit board, super-thin circuit board, printed circuit board etc., circuit board makes circuit miniaturization, intuition, for the batch production of fixed circuit and the important role of optimizing electric appliance layout, circuit board can be called printed wiring board or printed circuit board, with the characteristics of high wiring density, light weight, thin thickness, good bending property.

[0003] Circuit board test fixture generally includes pressing handle, pressing column, test rack, control box, guide column and the structure and usually for employee manual depression operation.The working stability and pressure control performance of existing circuit board test fixture are still not ideal.In long time use, or when operator exists improper operation problem, the structure of circuit board test fixture can be loose, shift, lead to the deviation of test head and circuit board test point, misalignment condition when testing, inaccurate test result, or the control of pressure when detecting can lead to the damage of probe, therefore, the working stability of circuit board test fixture is not good, lead to error and fault in testing process. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of electronic circuit board test fixture to solve the problems in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme, a kind of electronic circuit board test fixture, including bottom box and the lower movable plate being set on bottom box.

[0006] Limiting peg, the limiting peg is fixedly installed on bottom box, and the lower movable plate is sleeved on the limiting peg, and the limiting peg limits the lower movable plate range of movement in the limiting peg up and down;

[0007] The recess corresponding to the size of detection circuit board is opened in the lower movable plate, and spring is arranged below the lower movable plate sleeved on the limiting peg, and the spring provides upward supporting force for the lower movable plate;

[0008] Fixed shaft is arranged on both sides of the recess opened in the lower movable plate, the fixed shaft is sleeved with stopper, and the stopper rotates to circuit board with fixed shaft as center, and the position is further limited.

[0009] Preferably, a bracket is fixedly installed on the rear side above the base box, and a horizontal plate is provided in the fixing hole on the bracket. The horizontal plate can be adjusted to adjust the horizontal position by changing the fixing hole on the bracket.

[0010] Preferably, a hydraulic cylinder is provided on the horizontal plate, a push rod is provided below the hydraulic cylinder, and an upper movable plate is fixedly installed at the lower end of the push rod.

[0011] Preferably, the upper movable plate is fixedly installed at the lower end of the push rod, and the upper movable plate is fixedly installed on the sleeve at the rear.

[0012] A probe is provided through the center of the upper movable plate, and a pressure bar is provided below the upper movable plate. A fixing rod is provided at the upper edge of the upper movable plate, and a needle guard plate is fixedly installed above the fixing rod.

[0013] Preferably, the sleeve is fitted onto the guide post, and the guide post is fixedly mounted on the bracket.

[0014] Preferably, control buttons are provided on the left and right sides of the inclined surface at the front of the base box, and a display is provided between the two control buttons.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This electronic circuit board testing fixture further limits the position of the circuit board to be tested by setting a stop on the lower movable plate, ensuring that the circuit board remains in the correct position during testing and reducing errors. Through the cooperation of limit pins and springs, and by changing the manual pressing down to hydraulically controlled pressing down, it prevents damage to the circuit board and measuring probe caused by unstable pressing down during testing, thereby reducing losses. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

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

[0019] In the diagram: base box 1, control button 101, display 102, limit pin 2, lower movable plate 201, spring 202, upper movable plate 3, fixing rod 301, needle guard plate 302, pressure bar 303, guide post 4, sleeve 401, probe 5, hydraulic cylinder 6, push rod 601, bracket 7, horizontal plate 701, fixed shaft 8, stop block 801. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 2 This utility model provides a technical solution: an electronic circuit board testing fixture, including a base box 1 and a lower movable plate 201 disposed on the base box 1, such as... Figure 2 As shown, the limiting pin 2 is fixedly installed on the base box 1 by threads, and the lower movable plate 201 is sleeved on the limiting pin 2. The limiting pin 2 restricts the movement range of the lower movable plate 201 within the limiting pin 2; as Figure 1 As shown, the lower movable plate 201 has a recess corresponding to the size of the circuit board to be tested. The lower movable plate 201 is a custom-made part based on the circuit board to be tested. A spring 202 is provided above and below the lower movable plate 201, which is sleeved on the limiting pin 2. The spring 202 provides upward support to the lower movable plate 201, allowing it to absorb some force when the device presses down on the circuit board for measurement, preventing excessive pressure from damaging the circuit board and probe 5 and causing unnecessary losses. Figure 1 As shown, the fixed shaft 8 is set on both sides of the recess on the lower movable plate 201. A stop block 801 is sleeved on the fixed shaft 8. The stop block 801 rotates around the fixed shaft 8 to the circuit board, further limiting its position and preventing the test head from deviating from the test point on the circuit board, misalignment, and inaccurate test results during testing.

[0022] Furthermore, such as Figure 1 As shown, a bracket 7 is fixedly installed on the rear side of the base box 1 with screws. A horizontal plate 701 is provided with a fixing hole on the bracket 7. The horizontal plate 701 can be adjusted to adjust the horizontal position by changing the fixing hole on the bracket 7, making the equipment more flexible and the replacement of parts more convenient.

[0023] Furthermore, such as Figure 1 As shown, a hydraulic cylinder 6 is provided on the horizontal plate 701, and a push rod 601 is provided below the hydraulic cylinder 6. The upper movable plate 3 is fixedly installed on the lower end of the push rod 601 by screws.

[0024] Furthermore, such as Figure 1 As shown, the upper movable plate 3 is fixedly installed on the lower end of the push rod 601 by screws. The push rod 601 can drive the upper movable plate 3 and its components to move up and down. The upper movable plate 3 is fixedly installed on the sleeve 401 at the rear by screws.

[0025] like Figure 2As shown, a probe 5 is installed through the center of the upper movable plate 3. The probe 5 is used to establish an electrical connection between the testing equipment and the test point on the circuit board, so as to measure electrical parameters such as voltage, current, and resistance. A pressure bar 303 is also provided below the upper movable plate 3. The pressure bar 303 can fix the position of the circuit board and prevent the circuit board from shifting due to vibration, movement or other external factors during the testing process. A fixing rod 301 is provided at the upper edge of the upper movable plate 3. A needle protection plate 302 is fixedly installed on the upper part of the fixing rod 301 by screws. The needle protection plate 302 prevents the probe 5 from being damaged by external impact.

[0026] Furthermore, such as Figure 2 As shown, sleeve 401 is fitted onto guide post 4, and guide post 4 is fixedly mounted on bracket 7 with screws to ensure accurate alignment of circuit board with probe 5 during testing. Guided by guide post 4, probe 5 and other components can accurately contact the point or area to be tested.

[0027] Furthermore, such as Figure 1 As shown, control buttons 101 are provided on the left and right sides of the inclined surface at the front of the base box 1, and a display 102 is provided between the two control buttons 101, making it simple and easy to operate.

[0028] In actual use, the circuit board to be tested is placed in the customized recess on the lower movable plate 201, and then the stop block 801 is rotated to position it above the circuit board to be tested and fix its position. The hydraulic cylinder 6 is commanded by the control button 101, the push rod 601 moves downward and drives the upper movable plate 3 and the probe 5 mounted on the upper movable plate 3 downward. The pressure rod 303 contacts the circuit board to fix its position and prevents the circuit board from shifting due to vibration, movement or other external factors during the test. The probe 5 contacts the contacts on the circuit board to establish an electrical connection so as to measure electrical parameters such as voltage, current and resistance. The spring 202 absorbs part of the pressure applied by the pressure rod 303 to prevent excessive pressure from damaging the circuit board and the probe 5.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electronic circuit board testing fixture, comprising a bottom box and a lower movable plate arranged on the bottom box, characterized in that: a limiting pin is fixedly installed on the bottom box, and the lower movable plate is sleeved on the limiting pin, and the limiting pin limits the moving range of the lower movable plate to move up and down within the limiting pin; a recess corresponding to the size of the detected circuit board is formed on the lower movable plate, and a spring is arranged below the lower movable plate sleeved on the limiting pin, which provides upward supporting force for the lower movable plate; a fixed shaft is arranged on both sides of the recess formed on the lower movable plate, and a stop block is sleeved on the fixed shaft, which rotates to the circuit board with the fixed shaft as the center to further limit the position of the circuit board.

2. The electronic circuit board testing fixture of claim 1, wherein: A support is fixedly installed on the upper rear side of the bottom box, a fixed hole on the support is provided with a horizontal plate, and the horizontal plate can be replaced in the fixed hole on the support to adjust the horizontal position.

3. The electronic circuit board testing fixture of claim 2, wherein: A hydraulic cylinder is arranged on the horizontal plate, a push rod is arranged below the hydraulic cylinder, and an upper movable plate is fixedly installed on the lower end of the push rod.

4. The electronic circuit board testing fixture of claim 3, wherein: The upper movable plate is fixedly installed on the lower end of the push rod, and the rear of the upper movable plate is fixedly installed on a sleeve; a probe is arranged through the center of the upper movable plate, and a pressure rod is further arranged below the upper movable plate, a fixed rod is arranged at the upper edge of the upper movable plate, and a needle guard plate is fixedly installed above the fixed rod.

5. The electronic circuit board testing fixture of claim 4, wherein: The sleeve is sleeved on a guide column, and the guide column is fixedly installed on the support.

6. The electronic circuit board testing fixture of claim 4, wherein: Control buttons are arranged on the left and right sides of the inclined surface at the front of the bottom box, and a display is arranged between the two control buttons.

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