WO2019000975A1

WO2019000975A1 - Electrical test jig

Info

Publication number: WO2019000975A1
Application number: PCT/CN2018/076512
Authority: WO
Inventors: 万彬; 陈汉; 宁培桓; 孙炜; 郜等; 乔恺
Original assignee: 京东方科技集团股份有限公司; 合肥鑫晟光电科技有限公司
Priority date: 2017-06-30
Filing date: 2018-02-12
Publication date: 2019-01-03
Also published as: CN206863176U

Abstract

Provided is an electrical test jig, comprising a base (100), and a pressing fit piece (200) hinged on a head-pressing end (220) and handle-pressing end (210) of the base. The base (100) comprises a main body (101), a limiting part (110) arranged on the main body (101) and used for accommodating a circuit board to be detected, a signal conversion board (120) arranged on the main body (101) and used for providing an electrical test signal, and a connector arranged in the limiting part (110) and connected to the signal conversion board (120), wherein two ends of the pressing fit piece (200) are respectively the head-pressing end (220) and the handle-pressing end (210); a first portion (201), located between the head-pressing end (220) and the handle-pressing end (210), on the pressing fit piece (200) is hinged on the base (100); and the positions of the head-pressing end (220) and the limiting part (110) are adapted to each other.

Description

Electric measuring fixture

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201720781941.2, filed on Jun.

Technical field

The present disclosure relates to the field of test equipment technologies, and in particular, to an electrical test fixture.

Background technique

At present, for products with flexible printed circuit boards (FPCA), such as liquid crystal display panels, in the manufacturing process, it is necessary to conduct electrical test of the flexible printed circuit board, and transmit signals to the flexible printed circuit board through the signal terminals. Therefore, it is required The flexible printed circuit board is connected to the signal terminal.

Summary of the invention

An electrical test fixture includes a base and a pressing member hinged on the base. The base includes a body, a limiting portion disposed on the body for accommodating the circuit board to be inspected, a signal conversion board disposed on the body for providing an electrical measurement signal, and a signal conversion board disposed at the a connector in the limiting portion and connected to the signal conversion board. Wherein the two ends of the pressing member are respectively a pressing end and a pressing end; a first portion of the pressing member between the pressing end and the pressing end is hinged on the base The indenter end is adapted to the position of the limiting portion.

Optionally, the connecting component includes a plurality of probes, and a plurality of probe receiving holes are disposed on the limiting portion, and the probes are respectively disposed in the probe receiving apertures.

Optionally, the limiting portion is detachably disposed on the body.

Optionally, the probe is disposed in a telescopic manner in the probe receiving hole of the limiting portion.

Optionally, the probe includes a first ejector connected to the signal conversion board, a second ejector for connecting to the circuit board to be inspected, and between the first ejector pin and the second ejector pin and An elastic member that connects the first thimble and the second thimble.

Optionally, the probe further includes a tube; one end of the first thimble, one end of the second thimble, and the elastic element are disposed in the tube; the first thimble and the first The two thimbles are electrically connected through the tube body.

Optionally, the body includes opposite first and second surfaces; the pressing member and the limiting portion are both disposed on the first surface of the body; the signal conversion board is disposed at the a second surface side of the body; the second surface of the body has a receiving cavity; the electrical measuring fixture further includes a probe disposed in the receiving cavity and facing the position of the limiting portion a needle mounter; the probe mounter is mounted with a plurality of the probes, and a plurality of the probes on the probe mounter extend through the body into the limit portion The probe is housed in the hole.

Optionally, the indenter end of the pressing member has a protruding pressing block matched with the structure of the limiting portion for pressing the circuit board to be inspected on the connecting member, and the protruding pressure is The position of the block is adapted to the position of the stop.

Optionally, the electric measuring fixture further comprises a resetting member for returning the pressing end of the pressing member from the pressed state to the raised state, wherein the resetting member is disposed on the pressing member and Between the bases.

Optionally, the first portion of the pressing member is hinged to the base by a rotating shaft, and the resetting member comprises a set of torsion springs disposed on the rotating shaft.

Optionally, the first portion is a middle portion of the pressing member.

Optionally, the electrical test fixture further includes an electrical signal insertion interface disposed on the signal conversion board for accessing an electrical measurement signal of the external electrical test device.

DRAWINGS

1 is a schematic perspective view showing the electrical measuring tool provided in the embodiment of the present disclosure in a pressed state;

2 is a front elevational view showing the electrical test fixture provided in the embodiment of the present disclosure in a pressed state;

Figure 3 shows the right side view of Figure 2;

4 is a schematic perspective view showing the electrical measuring tool provided in the embodiment of the present disclosure in an open state;

Figure 5 is a front elevational view showing the electrical test fixture provided in the embodiment of the present disclosure in an open state;

Figure 6 shows a right side view of Figure 5;

Figure 7 is an exploded view of the electrical test fixture provided in the embodiment of the present disclosure;

FIG. 8 is a schematic structural view of a probe provided in an embodiment of the present disclosure.

Detailed ways

The technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. It is apparent that the described embodiments are part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure are within the scope of the disclosure.

In the related art, the electric measuring fixture adopts a piano cover structure, which has high requirements on the operator's working ability, long working time, and difficulty in plugging. After the piano cover is closed, it is impossible to observe whether the circuit board to be tested is inserted into the position, The anti-dead measures, the high misconnection rate caused by poor plug-in, the high loss rate of the circuit board, and the problem of delaying the production capacity, etc., the present disclosure provides an electric measuring jig, which has a simple structure and is more convenient to replace the structure of the piano cover type electric measuring jig. Staff work, high stability.

As shown in FIG. 1, the electrical test fixture provided in the embodiment of the present disclosure includes a base 100 and a pressing member 200 hinged on the base 100.

As shown in FIG. 7 , the base 100 includes a body 101 having a mounting portion 103 , a limiting portion 110 disposed in the mounting portion 103 , a signal conversion board 120 disposed on the body 101 , and a limiting portion A connector in the 110 and connected to the signal conversion board 120 (described further below). The limiting portion 110 is configured to receive the circuit board to be inspected. In an embodiment, the limiting portion 110 may be a card slot or a surrounding circuit to be detected capable of accommodating the circuit board to be detected and limiting the circuit board to be detected. The raised structure of the board is set. The signal conversion board 120 is used to provide an electrical measurement signal. The connecting member is used for electrically connecting the gold finger of the circuit board to be inspected placed in the limiting portion 110 to the signal conversion board 120.

The first portion 201 of the pressing member 200, such as the middle portion of the pressing member 200, can be hinged on the base 100. The two ends of the pressing member 200 are a pressing end 220 and a pressing end 210 respectively, and the pressing end 220 is matched with the position of the limiting portion 110. Here, "fitted" means that the indenter end 220 can be pressed into the limiting portion 110 of the base 100.

When detecting the circuit board to be inspected by using the above-mentioned electrical measuring fixture, the pressing end 210 is first pressed, so that the indenter end 220 is lifted from the limiting portion 110, so that the circuit board to be inspected can be placed. In the limiting portion 110. Then, the shank end 210 is lifted, so that the ram end 220 is pressed against the limiting portion 110 of the base 100 to make the circuit board to be inspected in contact with the connecting member.

The electrical measuring fixture provided by the present disclosure is designed as a clip-type structure, that is, the signal conversion board 120 is designed on the base 100, that is, the signal conversion board 120 of the product is mounted on the body 101, and the pressing member 200 is mounted thereon. A central portion between the ram end 220 and the shank end 210 is hinged to the base 100 to form a clip structure. The electric measuring tool utilizes the principle of leverage to replace the piano cover turning method in the related art by pressing. When the electrical test fixture is to be used to detect the test circuit board, the press shank end 210 is depressed such that the ram end 220 is lifted. At this time, the clip structure of the electric measuring fixture is in an open state (as shown in FIG. 4, FIG. 5 and FIG. 6), and the gold finger of the circuit board to be inspected can be placed in the limiting portion 110 below the indenter end. . Then, the shank end 210 is lifted, and the ram end 220 presses the gold finger of the circuit board to be tested on the limiting portion 110 of the base 100 (as shown in FIG. 1 , FIG. 2 and FIG. 3 ). For example, the circuit board to be inspected is brought into contact with the connecting member, so that the signal to be detected by the circuit board to be tested can be received during testing to test the electrical performance of the circuit board to be inspected.

It can be seen that the electric measuring fixture provided by the present disclosure adopts the clip pressing structure, and has the following advantages:

1) The electric measuring fixture of the present disclosure can directly observe whether the golden finger is correctly placed, has a foolproof function, and avoids misjudgment;

2) The electric measuring fixture of the present disclosure uses the principle of the lever to directly place the signal conversion board inside the base 100 by pressing, thereby improving the service life (the service life can be ensured by simple maintenance such as replacing the connecting piece).

3) The electric measuring fixture of the present disclosure adopts a pressing method, and the working time is about 4 s, which effectively reduces the Tack time.

An alternative embodiment of the electrical test fixture provided by the present disclosure is described below.

In an optional embodiment provided by the present disclosure, the limiting portion 110 is detachably disposed on the body 101 of the base 100.

With the above solution, the limiting portion 110 is detachably disposed on the body 101 of the base 100, and the limiting portion 110 can be designed according to the shape of the golden finger of the circuit board to be inspected, so as to be different products. Replacing the corresponding limiting portion 110 improves the versatility of the electrical measuring fixture and has a foolproof effect.

In an alternative embodiment provided by the present disclosure, as shown in FIG. 7 , the connecting member includes a plurality of probes 106 , and a plurality of probe receiving holes 108 are disposed on the limiting portion 110 . The probe receiving hole 108 accommodates the probe 106.

With the above solution, the connector uses the probe 106 to realize the electrical connection between the circuit board to be inspected and the signal conversion board 120. The structure is simple, and the connection device of the signal conversion board 120 can be prevented from being directly exposed. After the damage, the probe can be directly replaced without replacing the signal conversion board 120, thereby increasing the productivity, reducing the loss, and reducing the cost.

It is to be understood that, in practical applications, the connector may be implemented in other manners, which is not limited thereto.

Moreover, in an alternative embodiment of the present disclosure, the probe is disposed in the probe receiving hole of the limiting portion 110 in a telescopic manner.

In the above solution, the probe is disposed in the probe receiving hole of the limiting portion 110 in a telescopic manner. When the circuit board to be inspected is pressed, the probe can be telescopically Retract the pressure of the board to be tested to avoid hard scratches on the board to be tested.

Optionally, as shown in FIG. 8, the probe 106 includes a tube body 1064, a first ejector pin 1061 connected to the signal conversion board 120, a second ejector pin 1063 for connecting to the circuit board to be detected, and a An elastic member 1065 between the first thimble and the second thimble. One end of the first ejector pin 1061, one end of the second ejector pin 1063, and the elastic member 1065 are disposed in the tube body 1064, and the first ejector pin 1061 and the second ejector pin 1063 are electrically connected through the tube body 1064.

According to the above solution, the elastic expansion and contraction of the probe can be realized by providing the elastic member, so that the scratch of the circuit board to be inspected can be avoided, and the contact between the probe and the circuit board to be inspected can be ensured. It should be understood that, in practical applications, the scalable setting manner of the probe is not limited thereto, and various implementation manners are possible.

Moreover, in an alternative embodiment provided by the present disclosure, as shown in FIG. 7, the body 101 of the base 100 includes opposing first and

second surfaces

1013, 1015. The pressing member 200 and the limiting portion 110 are both disposed on the first surface 1013 of the body 101. The signal conversion board 120 is disposed on a side of the second surface 1015 of the body 101. The second surface 1015 of the body 101 has an accommodating cavity 109 (shown by a broken line in FIG. 7 ), and a probe mounting disposed opposite to the position of the limiting portion 110 is disposed in the accommodating cavity 109 . 400. A plurality of the probes 106 are mounted on the probe mounter 400, and a plurality of probes on the probe mounter 400 extend through the body 101 to the limit portion 110. The needle is received in the hole 108.

The above solution is an alternative embodiment of the electrical test fixture of the present disclosure. The signal conversion board 120 can be protected by the base 100, and the probe can be mounted and fixed by the probe mounter 400. It can be understood that the specific installation manner of the signal conversion board 120 and the probe is not limited.

In addition, in the embodiment provided by the present disclosure, as shown in FIG. 1 to FIG. 7 , the ram end 220 of the nip member 200 has a structure matching the structure of the limiting portion 110 for The bumps 230 to be inspected are pressed against the bumps 230 on the connecting member, and the positions of the bumps 230 are matched with the positions of the limiting portions 110.

With the above solution, the protruding block 230 is disposed at the indenter end 220 of the pressing member 200 to cooperate with the structure of the limiting portion 110 to press the gold finger of the circuit board to be inspected. In the limiting portion 110.

In addition, in an optional embodiment provided by the present disclosure, as shown in FIG. 5, the electric measuring fixture further includes a function for resetting the pressing end 210 of the pressing member 200 from a pressed state to a lifting state. The reset member 114 is in a state, and the reset member 114 is disposed between the press member 200 and the base 100.

Optionally, as shown in FIG. 5, the middle portion of the pressing member 200 is hinged with the base 100 through a rotating shaft 112. The resetting member 114 includes a set of torsion springs disposed on the rotating shaft 112.

With the above arrangement, by providing the reset member, the shank end 210 of the pressing member 200 of the clip structure can be automatically reset. It should be understood that the specific structure of the reset member is not limited.

In addition, in an optional embodiment provided by the present disclosure, as shown in FIG. 7 , the electrical test fixture further includes an electrical test signal disposed on the signal conversion board 120 for accessing an external electrical test device. The electrical signal is inserted into the interface 300.

With the above solution, the electrical signal insertion interface 300 provided on the electrical measuring fixture can be a USB interface for connecting with an external electrical testing device (such as a computer) to apply a test signal to the circuit board to be tested.

The above is only an alternative embodiment of the present disclosure, and it should be noted that those skilled in the art can make several improvements and substitutions without departing from the principles of the disclosed technology. Substitutions are also considered to be the scope of protection of the present disclosure.

Claims

An electrical test fixture comprising:

Base; and

a pressing member hinged on the base;

The base includes a body, a limiting portion disposed on the body for accommodating the circuit board to be inspected, a signal conversion board disposed on the body for providing an electrical measurement signal, and a signal conversion board disposed at the a connector in the limiting portion and connected to the signal conversion board;

Wherein the two ends of the pressing member are respectively a pressing end and a pressing end; a first portion of the pressing member between the pressing end and the pressing end is hinged on the base The indenter end is adapted to the position of the limiting portion.
The electrical test fixture according to claim 1, wherein the connecting member comprises a plurality of probes, and a plurality of probe receiving holes are disposed on the limiting portion, and the probes are respectively disposed on the The probe is placed in the hole.
The electric test fixture according to claim 2, wherein the stopper is detachably provided on the body.
The electrical test fixture according to claim 3, wherein the probe is telescopically disposed in the probe receiving hole of the limiting portion.
The electrical test fixture according to claim 4, wherein said probe comprises a first ejector coupled to said signal conversion board, a second ejector for connection to a circuit board to be inspected, and said first An elastic member between the thimble and the second thimble and connecting the first thimble and the second thimble.
The electrical test fixture according to claim 5, wherein said probe further comprises a tubular body; one end of said first thimble, one end of said second thimble, and said elastic member are disposed in said tubular body The first thimble and the second thimble are electrically connected through the tube body.
The electrical test fixture of claim 2, wherein the body includes opposing first and second surfaces; the press member and the limit portion are both disposed on the first surface of the body The signal conversion board is disposed on a side of the second surface of the body; the second surface of the body has a receiving cavity;

The electrical test fixture further includes a probe mounter disposed in the accommodating cavity and facing the position of the limiting portion; the probe mounter is mounted with a plurality of the probes, and A plurality of the probes on the probe mount extend through the body into the probe receiving holes of the limiting portion.
The electrical test fixture according to claim 1, wherein the pressing end of the pressing member has a structure matching the structure of the limiting portion for pressing the circuit board to be inspected on the connecting member. a raised compact, the position of the raised compact being adapted to the position of the stop.
The electrical test fixture according to claim 1, wherein the electrical test fixture further comprises a reset member for returning the press shank end of the nip member from a depressed state to a raised state, A reset member is disposed between the pressing member and the base.
The electrical test fixture according to claim 9, wherein said first portion of said nip is hinged to said base by a rotating shaft, said reset member comprising a set of twists provided on said rotating shaft spring.
The electrical test fixture of claim 10, wherein the first portion is a middle portion of the nip.
The electrical test fixture according to claim 1, wherein the electrical test fixture further comprises an electrical signal insertion interface disposed on the signal conversion board for accessing an electrical measurement signal of an external electrical test device.