Precise detection jig for circuit board

Abstract

The utility model discloses a circuit board precision detection tool comprising a detection bench, the upper surface of the detection bench is fixedly provided with a support plate, the top bottom of the support plate is fixedly provided with a telescopic electric push rod, the bottom end of the telescopic electric push rod is fixedly provided with a lifting detection plate, and the bottom surface of the lifting detection plate is provided with a plurality of probe installation seats in a rectangular array distribution mode. The bottom end of the probe mounting seat is detachably provided with a detection probe, the detection probe comprises a connecting block, the bottom end of the connecting block is detachably connected with the bottom end of the probe mounting seat, the bottom end of the connecting block is slidably provided with a conductive connecting rod, and the bottom end of the conductive connecting rod is fixedly provided with a detection needle. The outer side of the conductive connecting rod is sleeved with a buffer spring, and the buffer spring is located between the connecting block and the detection needle. According to the utility model, by reducing the contact pressure between the detection probe and the detected circuit board, rigid impact between the detection probe and the circuit board is avoided, and the circuit board is prevented from being damaged during detection.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board detection fixtures, in particular to a precision detection fixture for circuit boards. Background Technique

[0002] A circuit board, also known as a printed circuit board or PC board, is an electronic device. The circuit board miniaturizes and visualizes the circuit, and plays an important role in the mass production of fixed circuits and the optimization of the layout of electrical appliances. If classified by the number of layers, the circuit board is divided into three major categories: single-sided boards, double-sided boards, and multi-layer circuit boards.

[0003] After production, the circuit board needs to be detected. During detection, a precision detection fixture is required to fix the circuit board, and then the circuit board is detected through the detection board and detection probes on the precision detection fixture. A fixture is a large category of tools for carpentry, ironworking, fitter work, machinery, electronic control, and other handicrafts. It is mainly a tool used to assist in controlling positions or movements. Fixtures can be divided into three categories: process assembly fixtures, project testing fixtures, and circuit board testing fixtures.

[0004] However, the probes on the circuit board detection fixture are fixedly installed with the detection board, which is not convenient for disassembly and replacement. Moreover, when the probes contact the circuit board, it is a rigid contact. Once the contact force is too large, it will cause damage to the circuit board. Therefore, it does not meet the existing requirements. For this reason, we propose a precision detection fixture for circuit boards. Content of the Utility Model

[0005] The purpose of the utility model is to provide a precision detection fixture for circuit boards to solve the problems raised in the above background technique, that is, the probes on the circuit board detection fixture are fixedly installed with the detection board, which is not convenient for disassembly and replacement, and when the probes contact the circuit board, it is a rigid contact. Once the contact force is too large, it will cause damage to the circuit board.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A precision detection fixture for circuit boards, including a detection table, a support plate is fixed on the upper surface of the detection table, a telescopic electric push rod is fixed at the bottom of the top of the support plate, a lifting detection board is fixed at the bottom end of the telescopic electric push rod, a plurality of probe mounting seats are distributed in a rectangular array on the bottom surface of the lifting detection board, a detection probe is detachably installed at the bottom end of the probe mounting seat, the detection probe includes a connection block, the bottom end of the connection block is detachably connected to the bottom end of the probe mounting seat, a conductive connecting rod is slidably installed at the bottom end of the connection block, a detection needle is fixed at the bottom end of the conductive connecting rod, and a buffer spring is sleeved outside the conductive connecting rod, and the buffer spring is located between the connection block and the detection needle.

[0007] Preferably, an insulating protective sleeve is provided outside the buffer spring. The insulating protective sleeve is made of rubber, and both ends of the insulating protective sleeve are respectively fixed to the bottom end of the connecting block and the top end of the detection needle.

[0008] Preferably, a round hole is provided at the bottom end of the connecting block, and two anti-disengagement tabs are fixed to the top end of the conductive connecting rod.

[0009] Preferably, the top end of the anti-disengagement tab is semi-circular, and two guiding grooves are provided on the inner wall of the round hole. The top end of the anti-disengagement tab is slidably clamped in the guiding grooves.

[0010] Preferably, a plug-in groove is provided at the bottom end of the probe mounting seat, and an assembly piece is clamped to the top end of the connecting block. Both ends of the assembly piece are bent at 90 degrees and are clamped to the top end of the connecting block.

[0011] Preferably, the assembly piece is slidably clamped inside the plug-in groove, and both sides of the assembly piece protrude outward in a V shape.

[0012] Preferably, a plurality of elastic support pieces are fixed to the inner side of the assembly piece, and the middle of the elastic support piece arches upward in an arc shape.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model drives the lifting detection plate to descend by energizing and starting the telescopic electric push rod, so that the bottom end of the detection needle approaches the circuit board. After the bottom end of the detection needle contacts the circuit board, the detection needle drives the conductive connecting rod to slide into the inside of the bottom end of the connecting block. At this time, the buffer spring will be compressed. The downward force of the buffer spring on the connecting block is buffered and partially offset, reducing the pressure of the detection needle on the circuit board, avoiding rigid impact between the detection needle and the circuit board, and preventing the circuit board from being damaged.

[0015] 2. When the detection probe is damaged during use in the present utility model, the staff only needs to hold the connecting block and pull it downward, so that the assembly piece slides to the bottom of the plug-in groove. At this time, both sides of the assembly piece will squeeze toward the middle and cause the elastic support piece to bend upward and deform until the assembly piece is separated from the bottom end of the connecting block. Then, a new connecting block can be reconnected to the probe mounting seat, realizing the overall replacement of the detection probe. The operation is simple and fast, facilitating the replacement and maintenance of the detection probe on the precision detection jig. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the whole of the present utility model;

[0017] Figure 2 is a schematic structural diagram of the probe mounting seat of the present utility model;

[0018] Figure 3This is a schematic structural diagram of the detection probe of the present utility model;

[0019] Figure 4 is Figure 3 an enlarged view of the structure at position A in

[0020] Figure 5 is Figure 3 an enlarged view of the structure at position B in

[0021] In the figure: 1, detection table; 2, lifting detection plate; 3, support plate; 4, telescopic electric push rod; 5, detection probe; 51, connecting block; 52, detection needle; 53, conductive connecting rod; 54, buffer spring; 55, insulating protective sleeve; 56, anti - detachment tab; 57, assembly piece; 58, elastic support piece; 6, probe mounting seat; 7, insertion slot. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0023] As Figures 1 to 4 shown, a precision detection fixture for a circuit board, a support plate 3 is fixed on the upper surface of the detection table 1, a telescopic electric push rod 4 is fixed at the bottom of the top end of the support plate 3, a lifting detection plate 2 is fixed at the bottom end of the telescopic electric push rod 4, a plurality of probe mounting seats 6 are distributed in a rectangular array on the bottom surface of the lifting detection plate 2, a detection probe 5 is detachably installed at the bottom end of the probe mounting seat 6, the detection probe 5 includes a connecting block 51, the bottom end of the connecting block 51 is detachably connected to the bottom end of the probe mounting seat 6, a conductive connecting rod 53 is slidably installed at the bottom end of the connecting block 51, a detection needle 52 is fixed at the bottom end of the conductive connecting rod 53, a buffer spring 54 is sleeved outside the conductive connecting rod 53, the buffer spring 54 is located between the connecting block 51 and the detection needle 52. The presence of the buffer spring 54 enables the detection needle 52 to move towards the connecting block 51 direction after contacting the circuit board, achieving buffering through the buffer spring 54, avoiding rigid impact between the detection needle 52 and the circuit board, and avoiding damage to the circuit board.

[0024] An insulating protective sleeve 55 is provided outside the buffer spring 54. The material of the insulating protective sleeve 55 is rubber. The two ends of the insulating protective sleeve 55 are respectively fixed to the bottom end of the connecting block 51 and the top end of the detection needle 52. The insulating protective sleeve 55 is used to surround and protect the buffer spring 54 and the conductive connecting rod 53, avoiding dust from contacting the conductive connecting rod 53 and causing the conductive connecting rod 53 to be corroded or contaminated.

[0025] The bottom end of the connecting block 51 is provided with a round hole. Two anti - detachment hanging pieces 56 are fixed at the top end of the conductive connecting rod 53. The top end of the anti - detachment hanging piece 56 is semi - circular. Two guiding grooves are provided on the inner wall of the round hole. The top ends of the anti - detachment hanging pieces 56 are slidably clamped in the guiding grooves. The anti - detachment hanging pieces 56 are used to hang and support the conductive connecting rod 53 and the detection needle 52, avoiding the separation or detachment of the conductive connecting rod 53 from the connecting block 51.

[0026] As Figure 3 and Figure 5 shown, the bottom end of the probe mounting seat 6 is provided with a plug - in slot 7. The top end of the connecting block 51 is clamped with an assembly piece 57. Both ends of the assembly piece 57 are bent at a right angle and clamped at the top end of the connecting block 51. The assembly piece 57 is slidably clamped inside the plug - in slot 7, and both sides of the assembly piece 57 protrude outward in a V - shape. By using the assembly piece 57 with both sides protruding outward in a V - shape and clamping it inside the plug - in slot 7, the connection strength between the connecting block 51 and the probe mounting seat 6 is increased, avoiding the separation or detachment of the connecting block 51 from the probe mounting seat 6.

[0027] A plurality of elastic support pieces 58 are fixed inside the assembly piece 57. The middle of the elastic support piece 58 arches upward in an arc. The elastic support piece 58 with an arched middle has good elasticity. By using the elastic elastic support piece 58 to squeeze the two ends of the assembly piece 57 against the inner wall of the plug - in slot 7, it is ensured that the assembly piece 57 cannot fall out of the plug - in slot 7 without external intervention.

[0028] Working principle: First, turn on the power supply of the precision detection jig. Then, the staff places the circuit board to be detected on the surface of the detection table 1. Subsequently, the telescopic electric push rod 4 is powered on and starts to drive the lifting detection board 2 to descend, so that the bottom end of the detection needle 52 approaches the circuit board. After the bottom end of the detection needle 52 contacts the circuit board, the detection needle 52 drives the conductive connecting rod 53 to slide into the bottom inside of the connecting block 51. At this time, the buffer spring 54 will be compressed. The buffer spring 54 buffers and partially offsets the downward force on the connecting block 51, reducing the pressure of the detection needle 52 on the circuit board, avoiding the rigid impact between the detection needle 52 and the circuit board, and preventing the circuit board from being damaged. When the detection probe 5 is damaged during use, the staff only needs to hold the connecting block 51 and pull it downward, making the assembly piece 57 slide towards the bottom of the plug - in slot 7. At this time, both sides of the assembly piece 57 will squeeze towards the middle and cause the elastic support piece 58 to bend upward deforming until the assembly piece 57 separates from the bottom end of the connecting block 51. Then, reconnect the new connecting block 51 with the probe mounting seat 6, realizing the overall replacement of the detection probe 5. The operation is simple and fast, facilitating the replacement and maintenance of the detection probe 5 on the precision detection jig.

[0029] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A precision inspection jig for circuit boards, comprising an inspection platform (1), a support plate (3) being fixed to the upper surface of the inspection platform (1), a telescopic electric push rod (4) being fixed to the top and bottom of the support plate (3), and a lifting inspection plate (2) being fixed to the bottom of the telescopic electric push rod (4), wherein: A plurality of probe mounting seats (6) are distributed in a rectangular array on the bottom surface of the lifting detection plate (2); a detection probe (5) is detachably mounted on the bottom end of the probe mounting seat (6); the detection probe (5) comprises a connecting block (51); the bottom end of the connecting block (51) is detachably connected to the bottom end of the probe mounting seat (6); a conductive connecting rod (53) is slidably mounted on the bottom end of the connecting block (51); a detection needle (52) is fixed to the bottom end of the conductive connecting rod (53); a buffer spring (54) is sleeved on the outer side of the conductive connecting rod (53); and the buffer spring (54) is located between the connecting block (51) and the detection needle (52).

2. The precision inspection jig for circuit boards according to claim 1, characterized in that: An insulating protective sleeve (55) is provided on the outside of the buffer spring (54), the insulating protective sleeve (55) is made of rubber, and the two ends of the insulating protective sleeve (55) are respectively fixed to the bottom end of the connecting block (51) and the top end of the detection needle (52).

3. The precision inspection jig for circuit boards according to claim 1, characterized in that: A round hole is provided at the bottom end of the connecting block (51), and two anti-detachment hanging plates (56) are fixed to the top end of the conductive connecting rod (53).

4. The circuit board precision detection jig according to claim 3, characterized in that: The top end of the anti-drop hanging piece (56) is semicircular, and the inner wall of the circular hole is provided with two guide grooves, and the top end of the book-searching anti-drop hanging piece (56) is slidably engaged in the guide grooves.

5. The precision inspection jig for circuit boards according to claim 1, characterized in that: The bottom end of the probe mounting seat (6) is provided with a plug-in slot (7), the top end of the connecting block (51) is clamped with an assembly piece (57), and both ends of the assembly piece (57) are bent at ninety degrees and clamped on the top end of the connecting block (51).

6. The circuit board precision inspection jig according to claim 5, characterized in that: The assembly piece (57) is slidably engaged with the inner side of the plug-in slot (7), and two sides of the assembly piece (57) are outwardly protruding in a V shape.

7. The circuit board precision inspection jig according to claim 6, characterized in that: A plurality of elastic support sheets (58) are fixed on the inner side of the assembly sheet (57), and the middle of the elastic support sheet (58) is arched upward in an arc shape.

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