Test jig for circuit board welding

Abstract

The utility model discloses a test frame for circuit board welding, which comprises a base station and a fixing frame, a carrier plate is arranged on the base station, a pressure switch is arranged on the carrier plate, a mounting seat is arranged on the fixing frame, a probe, a probe protection box and a pressing rod are arranged on the mounting seat, the probe is arranged in the probe protection box, a fan is arranged on the probe protection box, the fan is electrically connected with the pressure switch, and the pressing rod is electrically connected with the pressure switch. When the mounting base slides downwards, the pressing rod abuts against the carrier plate and extrudes the carrier plate, and the pressure switch on the carrier plate is started, so that the fan is driven to be started to lower the temperature in the needle protection box. Compared with the prior art, the test frame has the advantages that the mounting base is arranged on the test frame, the assembling base is arranged on the mounting base, and the top end of the probe extends out of the mounting base; a needle protection box is arranged on the mounting base, a fan is arranged on one side of the needle protection box, a carrier plate is arranged on the base table, a pressure switch is arranged on the carrier plate and electrically connected with the fan, and the carrier plate extrudes downwards to start the pressure switch so as to drive the fan to work to reduce the temperature in the needle protection box.

Description

Technical Field

[0001] This utility model relates to the field of circuit board testing technology, and in particular to a test fixture for circuit board soldering. Background Technology

[0002] Traditional circuit board soldering tests rely heavily on manual positioning, which is inefficient and prone to deviations, affecting soldering accuracy. Early test fixtures had simple structures, poor compatibility, and were difficult to adapt to circuit boards of different sizes. They also lacked high-temperature resistance design and were prone to deformation after long-term use. With the increasing demand for precision in electronic manufacturing, there is an urgent need for more stable and efficient test fixtures to ensure soldering quality and improve production efficiency.

[0003] During testing of existing circuit boards, the temperature of the probes used to test the circuit board increases when the board is powered on for a long time, which increases the contact resistance of the probes and thus affects the test results. Utility Model Content

[0004] In view of the above problems, the technical problem to be solved by this utility model is to provide a test fixture for circuit board soldering.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a test frame for circuit board soldering, comprising a base and a fixing frame, characterized in that a carrier plate is retractably provided on the base, a pressure switch is provided on the carrier plate, a mounting seat is slidably provided on the fixing frame, and a probe, a needle protection box and several pressure bars are provided on the mounting seat. The top of the probe is placed inside the needle protection box, and a fan is provided on the needle protection box. The fan is electrically connected to the pressure switch. When the mounting seat slides downward, the pressure bars abut against the carrier plate and press the carrier plate downward, causing the pressure switch on the carrier plate to be activated under pressure, thereby driving the fan to start and reduce the temperature inside the needle protection box.

[0006] A further preferred embodiment of this utility model is as follows: a guide post is provided on the fixing frame, a first sleeve is provided on the mounting base, the guide post is inserted into the first sleeve, and the mounting base slides up and down along the guide post through the first sleeve.

[0007] A further preferred embodiment of this utility model is as follows: a sliding rod is provided on the mounting base, a fixed seat is provided on the fixing frame, a handle and a second sleeve are rotatably provided on the fixed seat, and the sliding rod is inserted into the second sleeve and rotatably connected to the handle.

[0008] A further preferred embodiment of this utility model is: a reset spring is provided between the carrier plate and the base to reset the carrier plate.

[0009] A further preferred embodiment of this utility model is that the carrier plate is provided with a groove for placing the circuit board.

[0010] A further preferred embodiment of this utility model is that the two sides of the groove are symmetrically provided with notches to facilitate the removal of the circuit board.

[0011] A further preferred embodiment of this utility model is: a stop block for a limiting circuit board is provided on the carrier plate.

[0012] A further preferred embodiment of this utility model is: the mounting base is provided with an assembly base for fixing the probe.

[0013] A further preferred embodiment of this utility model is: the probe includes a needle tip and a needle base, and the needle tip is retractably disposed within the needle base.

[0014] A further preferred embodiment of this utility model is that the number of pressure bars is four, and the four pressure bars are evenly distributed on the mounting base.

[0015] Compared with the prior art, the present invention has the following advantages: a mounting base is provided on the test stand, an assembly base for fixing the probe is provided on the mounting base, the top of the probe extends out of the mounting base, a needle protection box for protecting the top of the probe is provided on the mounting base, a fan is provided on one side of the needle protection box, a carrier plate is provided on the base, a pressure switch is provided on the carrier plate, the pressure switch is electrically connected to the fan, and the carrier plate is pressed down to activate the pressure switch to drive the fan to work and reduce the temperature inside the needle protection box. Attached Figure Description

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0017] Figure 1 Schematic diagram of the overall structure of the test fixture Figure 1 ;

[0018] Figure 2 Schematic diagram of the overall structure of the test fixture Figure 2 ;

[0019] Figure 3 Exploded view of the slide bar and test fixture;

[0020] Figure 4 An exploded view of the circuit board and mounting bracket;

[0021] Figure 5 This is a schematic diagram of the overall structure of the mounting base;

[0022] Figure 6 This is a schematic diagram of the overall structure of the probe.

[0023] In the diagram: 1. Base; 2. Fixing frame; 3. Vertical plate; 4. Horizontal plate; 5. Guide post; 6. Handle; 7. Connecting plate; 8. Fixing seat; 9. Connector; 10. Hinge joint; 11. Slide rod; 12. First sleeve; 13. Second sleeve; 14. Probe; 14a. Needle; 14b. Needle seat; 15. Needle guard box; 16. Fan; 17. Mounting seat; 18. Pressure bar; 19. Carrier plate; 20. Circuit board; 21. Slot; 22. Notch; 23. Stop; 24. Return spring; 25. Assembly seat; 26. Pressure switch; 27. Protrusion; 28. Reinforcing plate. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0025] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0026] This embodiment mainly describes a test fixture for soldering circuit boards 20, as detailed below:

[0027] like Figure 1 , Figure 2 As shown, a test fixture for soldering circuit board 20 includes a base 1 and a fixing frame 2. The fixing frame 2 is fixedly mounted on the base 1. The base 1 is provided with an interface for connecting a power supply and a button for starting or stopping the test fixture.

[0028] The mounting bracket 2 includes two upright plates 3, two horizontal plates 4 and guide columns 5. The two upright plates 3 are symmetrically arranged on the base 1. Each upright plate 3 has a reinforcing plate 28 on its side. The upright plates 3 enhance the structural stability of the mounting bracket 2 during operation through the reinforcing plates 28, so as to ensure the smooth progress of the circuit board 20 testing operation.

[0029] A horizontal plate 4 is provided between the two vertical plates 3, and the two ends of the horizontal plate 4 are fixed between the two vertical plates 3 by screws.

[0030] The horizontal plate 4 is provided with a connecting plate 7 and a protrusion 27. There are two protrusions 27, which extend out of the horizontal plate 4. Each protrusion 27 is provided with a guide post 5. The connecting plate 7 is provided with a fixing seat 8.

[0031] like Figure 3As shown, a mounting base 17 is connected to the fixing frame 2. Specifically, a first sleeve 12 is provided on the mounting base 17. There are two first sleeves 12, and the two first sleeves 12 are set to correspond to the guide post 5. The guide post 5 is inserted into the corresponding first sleeve 12. The mounting base 17 slides up and down along the guide post 5 through the two first sleeves 12 to ensure that the mounting base 17 will not deviate during the sliding process.

[0032] The fixed base 8 is provided with a second sleeve 13 and a hinge joint 10. The hinge joint 10 is provided with a handle 6 that can be rotated. The mounting base 17 is provided with a slide rod 11. Specifically, the bottom end of the slide rod 11 is fixedly mounted on the mounting base 17 by means of screw connection, and the top end of the slide rod 11 passes through the second sleeve 13.

[0033] A connector 9 is provided between the handle 6 and the slide rod 11. There are two connectors 9, and the two connectors 9 are symmetrically arranged on both sides of the hinge joint 10. Specifically, the two ends of the two connectors 9 are respectively rotatably set on the top of the slide rod 11 and the handle 6. When the user rotates the handle 6, the rotation of the connectors 9 causes the slide rod 11 to slide, thereby driving the mounting base 17 to slide up and down, so that the operator can easily control the position of the mounting base 17 manually.

[0034] The mounting base 17 is provided with several probes 14 and pressure bars 18. Specifically, there are four pressure bars 18. The four pressure bars 18 are evenly arranged on the bottom surface of the mounting base 17 and correspond to the edge of the circuit board 20. When the handle 6 is rotated, the mounting base 17 slides downward, so that the pressure bars 18 press the circuit board 20 tightly to prevent the circuit board 20 from moving during the test and affecting the test results.

[0035] There are four probes 14, which pass through the mounting base 17. Specifically, the bottom surface of the mounting base 17 is fixedly provided with a mounting seat 25. The probes 14 are fixed in the mounting seat 25 by an interference fit connection to ensure the stability of the probes 14 during the test and to prevent the probes 14 from becoming loose and affecting the test results.

[0036] like Figure 6 As shown, the probe 14 includes a needle head 14a and a needle base 14b. The needle head 14a is telescopically disposed at both ends of the needle base 14b. The telescopic structure of the needle head 14a can adapt to the testing requirements of circuit boards 20 with different thicknesses. The bottom end of the needle head 14a abuts against the circuit board 20 for testing the circuit board 20. The top end of the needle head 14a extends out of the mounting base 17, and a needle protection box 15 is provided at the top end of the needle head 14a. The needle protection box 15 provides protection for the probe 14 to prevent the probe 14 from being damaged by the outside when not in use.

[0037] When the probe 14 is being tested, it needs to work for a long time while powered on, which causes the temperature of the probe 14 to rise gradually. The resistance of the probe 14 increases at high temperature, which leads to deviations in the test results.

[0038] To prevent the test results from changing due to the increased temperature of the probe 14, a fan 16 is provided on the side wall of the probe holder 15. When the mounting base 17 slides down to allow the needle 14a on the probe 14 to come into contact with the circuit board 20 for testing, the fan 16 on the probe holder 15 is activated to dissipate heat inside the probe holder 15, thereby reducing the temperature of the probe 14 and ensuring that the probe 14 is tested at a suitable temperature.

[0039] The base 1 is provided with a carrier plate 19 for placing the circuit board 20, and the carrier plate 19 can be placed on the base 1 in a telescopic manner. Specifically, a reset spring 24 is provided between the carrier plate 19 and the base 1 to reset the carrier plate 19. When the carrier plate 19 is pressed down by the pressure bar 18 on the mounting base 17, it slides downward. After the test is completed, the mounting base 17 extends, and the carrier plate 19 bounces upward under the elastic action of the reset spring 24, so that the carrier plate 19 returns to its initial position.

[0040] like Figure 4 As shown, the circuit board 20 is placed on the carrier board 19. Specifically, the carrier board 19 is provided with a groove 21, and the circuit board 20 is placed in the groove 21. Notches 22 are symmetrically provided on both sides of the groove 21. After the circuit board 20 has completed the test, the notches 22 make it easy for the operator to directly hold the notches 22 with their fingers and easily remove the circuit board 20.

[0041] The carrier plate 19 is also provided with a stop 23 for limiting the circuit board 20. The stop 23 abuts against the edge of the groove 21. The stop 23 can limit the position of the circuit board 20 of different thicknesses in the groove 21, prevent the circuit board 20 from sliding or shifting during the test, and ensure the accuracy of the test.

[0042] like Figure 5 As shown, a pressure switch 26 is provided on the bottom surface of the carrier plate 19. The pressure switch 26 is electrically connected to the fan 16 on the side wall of the needle protection box 15. When the mounting base 17 slides down, the pressure bar 18 abuts against the circuit board 20 and the carrier plate 19 is pressed down, so that the pressure switch 26 on the bottom surface of the carrier plate 19 abuts against the base 1. The pressure switch 26 is activated by the pressure to drive the fan 16 to start working, accelerate the air flow in the needle protection box 15, remove heat, thereby reducing the temperature in the needle protection box 15, thus protecting the probe 14, extending the service life of the probe 14, and ensuring the stability of the probe 14's performance during the test. After the test, the operator rotates the handle 6 in the opposite direction, so that the mounting base 17 slides up, the pressure bar 18 separates from the carrier plate 19, and the carrier plate 19 returns to its initial position under the action of the return spring 24. The pressure switch 26 is turned off, and the fan 16 stops operating.

[0043] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] The above provides a detailed description of a test fixture for circuit board soldering provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A test fixture for circuit board soldering, comprising a base and a fixing frame, characterized in that, A carrier plate is retractably mounted on the base, and a pressure switch is mounted on the carrier plate. A mounting base is slidably mounted on the fixing frame, and a probe, a needle protection box, and several pressure bars are mounted on the mounting base. The tip of the probe is placed inside the needle protection box, and a fan is mounted on the needle protection box. The fan is electrically connected to the pressure switch. When the mounting base slides downward, the pressure bars abut against the carrier plate and press down on the carrier plate, causing the pressure switch on the carrier plate to be activated, thereby driving the fan to start and reduce the temperature inside the needle protection box.

2. The test fixture for circuit board soldering according to claim 1, characterized in that, The fixed frame is provided with a guide post, and the mounting base is provided with a first sleeve. The guide post is inserted into the first sleeve, and the mounting base slides up and down along the guide post through the first sleeve.

3. The test fixture for circuit board soldering according to claim 1, characterized in that, The mounting base is provided with a sliding rod, the fixing frame is provided with a fixing seat, and the fixing seat is rotatably provided with a handle and a second sleeve. The sliding rod is inserted into the second sleeve and rotatably connected to the handle.

4. The test fixture for circuit board soldering according to claim 1, characterized in that, A reset spring is provided between the carrier plate and the base to reset the carrier plate.

5. A test fixture for circuit board soldering according to claim 1, characterized in that, The carrier plate is provided with slots for placing circuit boards.

6. A test fixture for circuit board soldering according to claim 5, characterized in that, The groove has symmetrical notches on both sides to facilitate the removal of the circuit board.

7. A test fixture for circuit board soldering according to claim 1, characterized in that, The carrier plate is provided with a stop for the limit circuit board.

8. A test fixture for circuit board soldering according to claim 1, characterized in that, The mounting base is equipped with a mounting bracket for fixing the probe.

9. A test fixture for circuit board soldering according to claim 1, characterized in that, The probe includes a needle tip and a needle base, with the needle tip retractably disposed within the needle base.

10. A test fixture for circuit board soldering according to claim 1, characterized in that, The number of pressure bars is four, and the four pressure bars are evenly distributed on the mounting base.

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