KR102458162B1 - Jig for PCB inspection - Google Patents

Abstract

The present invention relates to a jig for inspecting a PCB, in which at least one pinhole is formed in the center, and first and second plates are sequentially arranged on the upper and lower portions, and the lower end passes through the pinhole, the second plate It includes an inspection pin exposed downward, and on the lower surface of the second plate, receiving grooves concavely formed upwardly at both ends are formed, and a cushion part made of a cushion material is accommodated in the receiving groove, and the lower end of the cushion part is , when the first jig unit descends and comes into contact with the PCB in a state protruding downward than the second plate, the thickness may be reduced.

Description

Jig for PCB inspection {Jig for PCB inspection}

The present invention relates to a jig for PCB inspection.

In general, a printed circuit board (PCB) refers to a board immediately before mounting electronic components by forming a circuit line pattern on an electrically insulating board with a conductive material such as copper. Refers to a printed circuit board (PCB) with suitable electronic components.

The PCB is divided into a rigid PCB made of phenol and epoxy and a flexible PCB made of a material that can be easily bent, such as polyimide, depending on the type of substrate material.

On the other hand, as personal portable electronic devices such as mobile phones become popular, the circuit characteristics are stabilized and a small and lightweight PCB is used as the main board of personal portable electronic devices. used

After forming the circuit according to the pattern, such a PCB performs an electrical test to check whether the completed pattern is normally manufactured.

Electrical inspection uses a test facility to measure resistance at the beginning and end of the circuit to inspect the circuit’s open or short circuit. An inspection jig is used, and the inspection jig is made of a multi-layered plate and a plurality of inspection pins for electrical contact are inserted into the PCB, and the inspection is performed by connecting the test equipment and the PCB.

However, in the case of a conventional PCB inspection jig, when the upper jig descends from the upper side of the PCB or the lower jig rises from the lower side of the PCB, when the edge of the jig contacts the surface of the PCB, due to the edge of the jig, the surface of the PCB This phenomenon of being pressed or stamped occurs.

And, as described above, due to the contact between the edge of the jig and the PCB, a portion of the PCB is deformed and damaged, and there is a problem in that a good PCB is eventually reduced to a defective product.

Korean Patent No. 10-0551446

It is an object of the present invention to provide a PCB inspection jig that prevents dents or pressurization on the surface of the PCB even when the jig disposed on the upper or lower side of the PCB moves and touches the surface of the PCB for inspection of the PCB. there is

Another object of the present invention is to provide a PCB inspection jig capable of solving the problem that the surface of the PCB is deformed and damaged by contact with the edge of the jig, and can reduce the defect rate of the PCB.

The PCB inspection jig according to the present invention provided to achieve the above object includes a first jig unit disposed on the upper side of the PCB and a second jig unit disposed on the lower side of the PCB, the first jig The unit or the second jig unit forms at least one cushion part on a surface facing the PCB.

The first jig unit, at least one pinhole is formed in the center, the first plate and the second plate are arranged in succession on the upper and lower portions, and the lower end passes through the pinhole and is exposed to the lower side of the second plate Includes an inspection pin.

On the lower surface of the second plate, accommodating grooves concave upwardly are formed at both ends, and a cushion part made of a cushion material is accommodated in the accommodating groove.

When the cushion part comes into contact with the PCB while the first jig unit descends in a state in which the cushion part protrudes downward from the second plate, the thickness thereof may be reduced.

When the cushion part comes into contact with the PCB while the first jig unit descends in a state in which the cushion part protrudes downward from the second plate, the thickness thereof may decrease, and a plane may be formed with the second plate.

A height of the receiving groove may be smaller than a thickness of the cushion part.

The receiving groove may be formed to be concave inwardly at the lower end of both side surfaces of the second plate.

The cushion unit includes a cushion layer made of a cushion material, a reinforcing layer disposed under the cushion layer, a first adhesive layer bonding the cushion layer and the reinforcing layer, and bonding the upper surface of the receiving groove formed in the cushion layer and the second plate. It may include a second adhesive layer.

The cushion layer may be formed of conductive polyethylene.

The reinforcing layer may be formed of antistatic polyethylene.

The reinforcing layer may be formed of a material having high strength or hardness and excellent wear resistance.

The first adhesive layer and the second adhesive layer may be formed of an adhesive having conductivity.

When the lower end of the cushion layer comes into contact with the PCB while the first jig unit descends in a state that protrudes downward from the second plate, the thickness thereof is reduced, and the cushion layer may move upward than the second plate.

The first jig unit further includes a third plate and a fourth plate disposed on the first plate, at least one pinhole formed in the center, and consecutively disposed on the top and bottom, and the first plate A spacer may be formed between the first plate and the fourth plate to separate the first plate and the fourth plate.

An upper end of the inspection pin may pass through the pinholes of the third plate and the fourth plate.

The spacer may be disposed at both front and rear sides of the first plate and the fourth plate, respectively, to space the first plate and the fourth plate apart.

A groove formed concavely upward may be formed in the center of the second plate, and a lower end of the inspection pin may be exposed through the groove.

The second jig unit has at least one pinhole formed in the center, fifth and sixth plates sequentially arranged on the upper and lower portions, and the sixth plate arranged under the sixth plate, and at least one pinhole is formed in the center and a seventh plate and an eighth plate sequentially arranged on the upper and lower portions, a spacer disposed between the sixth plate and the seventh plate to space the sixth plate and the seventh plate, and an upper end and a lower end, respectively It may include an inspection pin penetrating through the pinhole and exposed to the upper side of the fifth plate.

The upper end of the test pin passing through the third plate and the lower end of the test pin passing through the eighth plate are connected to a tester through a wire, and the lower end of the test pin exposed to the lower side of the second plate and , an upper end of the inspection pin exposed to the upper side of the fifth plate may be connected to a contact point of the PCB.

At least a portion of the first jig unit and the second jig unit may be symmetrically disposed with respect to the PCB.

The disposition of the inspection pins of the first jig unit may be different from the arrangement of the inspection pins of the second jig unit.

According to the present invention as described above, for the inspection of the PCB, even when the jig disposed on the upper or lower side of the PCB moves and comes into contact with the surface of the PCB, there is an effect that the surface of the PCB is not dented or pressed.

In addition, it is possible to solve the problem that the surface of the PCB is deformed and damaged by contact with the edge of the jig, and there is an effect that can reduce the defect rate of the PCB.

1 is a perspective view showing a jig for PCB inspection without a cushion part;
2 is a perspective view showing the first jig unit of FIG. 1 upside down;
3 is a front view showing the inspection standby state of the PCB inspection jig not provided with a cushion part;
4 is a front view showing the inspection progress of the PCB inspection jig not provided with a cushion part;
5 is a perspective view showing a jig for PCB inspection according to the present invention;
6 is a perspective view showing a state in which the cushion part is attached to the first jig unit of FIG. 5;
7 is a front view showing the inspection standby state of the PCB inspection jig according to the present invention;
8 is a front view showing the inspection progress of the PCB inspection jig according to the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar elements throughout the specification.

In addition, in various embodiments, components having the same configuration will be described using the same reference numerals only in the representative embodiment, and only configurations different from the representative embodiment will be described in other embodiments.

Throughout the specification, when a part is "connected" to another part, it includes not only the case where it is "directly connected" but also the case where it is "indirectly connected" with another member interposed therebetween. In addition, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

Hereinafter, a jig for inspecting a PCB according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a perspective view showing a PCB inspection jig not provided with a cushion part, FIG. 2 is a perspective view showing the first jig unit of FIG. 1 upside down, and FIG. 3 is an inspection standby state of a PCB inspection jig not provided with a cushion part It is a front view shown, and FIG. 4 is a front view showing the inspection progress state of the PCB inspection jig which is not provided with a cushion part.

1 to 4 , the PCB inspection jig on which the cushion part is not formed includes a first jig unit 100 disposed above the PCB 10 and a second jig disposed below the PCB 10 . It may include a unit 200 .

The first jig unit 100 includes a second plate 120 disposed on an upper side of the PCB 10, a first plate 110 stacked on an upper side of the second plate 120, and the first plate ( It includes a fourth plate 140 spaced apart from the upper portion of the 110 , and a third plate 130 stacked on the upper side of the fourth plate 140 . In addition, a spacer 150 for separating the first plate 110 and the fourth plate 140 is provided between the first plate 110 and the fourth plate 140 . In addition, the upper end passes through the third and fourth plates 130 and 140 , and the lower end passes through the first and second plates 110 and 120 , and includes an inspection pin 160 exposed to the lower part of the second plate 120 . .

At this time, the central portion of the inspection pin 160 passes through the separation space 101 between the first plate 110 and the fourth plate 140 .

At this time, a protrusion 121 protruding downward is formed in the center of the lower end of the second plate 120 , and with the configuration of the protrusion 121 , protrusions 121 are formed on both sides of the lower end of the second plate 120 . ) is formed in the region where the cavity 122 is not formed.

In addition, corner portions 121a are formed on both sides of the protrusion portion 121 .

In addition, the second jig unit 200 includes a fifth plate 210 disposed under the PCB 10 , a sixth plate 220 stacked under the fifth plate 210 , and the sixth It includes a seventh plate 230 spaced apart from the lower portion of the plate 220 , and an eighth plate 240 stacked under the seventh plate 230 . In addition, a spacer 250 for separating the sixth plate 220 and the seventh plate 230 is provided between the sixth plate 220 and the seventh plate 230 .

In addition, the upper end passes through the fifth and sixth plates 210 and 220, is exposed to the upper portion of the fifth plate 210, and the lower end includes an inspection pin 260 passing through the seventh and eighth plates 230 and 240. . The lower end of the inspection pin 260 passes through the seventh and eighth plates 230 and 240 , but may protrude toward the lower end of the eighth plate 240 or may not be exposed.

At this time, the center of the inspection pin 260 passes through the separation space 201 between the sixth plate 220 and the seventh plate 230 .

And, in the inspection standby state, as shown in FIG. 3 , the first jig unit 100 is spaced apart from the upper side of the PCB 10 , and the second jig unit 200 is spaced apart from the lower side of the PCB 10 . do.

And, in the inspection progress state, as shown in FIG. 4 , the first jig unit 100 is in contact with the PCB 10 while moving from the upper side to the lower side of the PCB 10 , and the second jig unit 200 is While moving from the lower side to the upper side of the PCB (10), it is in contact with the PCB (10).

However, at this time, while the first jig unit 100 descends from the upper side of the PCB 10 , the corner portion 121a of the protrusion 121 formed at the lower end of the first jig unit 100 contacts the PCB 10 . and, due to this, a phenomenon in which the surface of the PCB 10 is pressed or stamped occurs.

And, as described above, by the contact of the corner portion 121a of the protrusion 121 of the first jig unit 100 and the PCB 10, a portion of the PCB 10, in particular, located outside the corner portion 121a. Deformation and damage occurred in the outer portion 10' of the PCB 10, and eventually there was a problem in that the good PCB 10 was reduced to a defective product.

In the present invention, in order to solve such a problem, a cushion part made of a cushion material is formed at the lower end of the first jig unit 100 .

5 is a perspective view showing a jig for inspecting a PCB according to the present invention, FIG. 6 is a perspective view showing a cushion part attached to the first jig unit of FIG. 5, and FIG. 7 is an inspection of the jig for inspecting a PCB according to the present invention It is a front view showing the standby state, and FIG. 8 is a front view showing the inspection progress state of the PCB inspection jig according to the present invention.

5 to 8 , in the case of the present invention, the cushion part 300 is formed at the lower end of the first jig unit 100 .

When an external force is applied, the cushion part 300 may be deformed in shape to absorb shock, and various embodiments may occur within the range of being restored to its original shape when the external force is removed.

In this case, at the lower end of the first jig unit 100 , a receiving groove 123 in which at least a portion of the cushion unit 300 is accommodated may be formed so that the cushion unit 300 may be disposed.

The lower end of the cushion unit 300 maintains a more protruding state than the lower end of the first jig unit 100 before contact with the PCB 10, and is compressed when in contact with the PCB 10, and its thickness decreases and , while absorbing the shock generated when the first jig unit 100 and the PCB 10 are in contact, the shock can be alleviated.

That is, in the case of the present invention, a buffer is made due to a change in the thickness of the cushion part 300, and thus, there is an effect that the PCB deformation is prevented.

Hereinafter, with reference to the drawings, the structure of the PCB inspection jig according to the present invention will be described in more detail.

Referring back to FIGS. 5 to 8 , the PCB inspection jig according to the present invention includes a first jig unit 100 disposed on the upper side of the PCB 10 and a second jig disposed on the lower side of the PCB 10 . A unit 200 is included, wherein the first jig unit 100 or the second jig unit 200 forms at least one cushion part 300 on a surface facing the PCB 10 .

At this time, when the cushion unit 300 is formed in the first jig unit 100 , the cushion unit 300 is attached to the lower end of the first jig unit 100 to protrude downward, and the second jig unit 200 . When the cushion part 300 is formed, the cushion part 300 may be attached to the upper end of the second jig unit 200 to protrude upward.

The cushion unit 300 may be formed at one position at the lower end of the first jig unit 100 or formed at a plurality of positions.

For example, the cushion unit 300 may be disposed at both lower ends of the second plate 120 disposed at the lower end of the first jig unit 100 .

The first jig unit 100, at least one pinhole is formed in the center, the first plate 110 and the second plate 120 are arranged in succession on the upper and lower portions, and the lower end passes through the pinhole, and an inspection pin 160 exposed to a lower side of the second plate 120 .

The lower end of the inspection pin 160 exposed to the lower side of the second plate 120 comes into contact with the contact formed on the upper surface of the PCB 10 .

On the lower surface of the second plate 120, accommodating grooves 123 concave upwardly are formed at both ends, and the cushioning part 300 made of a cushion material is accommodated in the accommodating grooves 123.

In the following description, the case where the cushion part 300 is attached to the lower end of the first jig unit 100 disposed on the upper side of the PCB 10 will be described as an example, but the scope of the present invention is not limited thereto. If necessary, the cushion unit 300 may be attached to the upper end of the second jig unit 200 disposed on the lower side of the PCB 10 .

The cushion unit 300 maintains a state protruding downward than the second plate 120 in the inspection standby state (state of FIG. 7 ), and at this time, the cushion unit 300 has a first thickness t1. have

Then, in the inspection progress state (the state of FIG. 8 ), when the lower end of the cushion unit 300 comes into contact with the PCB 10 while the first jig unit 100 descends, the cushion unit 300 becomes the first jig. The thickness of the unit 100 may be reduced to the second thickness t2 by the descending force.

In this case, the lower end of the cushion unit 300 may form a plane with the lower end of the second plate 120 .

On the other hand, the lower end of the cushion unit 300 may still protrude more than the lower end of the second plate 120 .

As described above, before the first jig unit 100 descends and the PCB 10 and the second plate 120 come into contact, the cushion unit 300 first contacts the PCB 10, and the cushion unit 300 is Compressed, as a result, an impact applied to the PCB 10 is reduced, and deformation and damage of the PCB 10 can be prevented.

In addition, the height of the receiving groove 123 may be formed to be smaller than the thickness of the cushion part 300 . Therefore, in the test standby state (the state of FIG. 7 ), the cushion part 300 may maintain a state protruding downward from the lower end of the second plate 120 .

In addition, the receiving groove 123 may be formed to be concave inwardly at the lower end of both sides of the second plate 120 .

That is, the accommodating groove 123 may be concave upwardly from the bottom surface of the second plate 120 , and the accommodating groove 123 may be concave inwardly from both side surfaces of the second plate 120 . it might be

In addition, the receiving groove 123 may be formed to be concave upwardly from the bottom surface of the second plate 120 , and may be formed to be concave inwardly from both side surfaces of the second plate 120 .

In addition, the cushion unit 300 includes a cushion layer 310 made of a cushion material, a reinforcing layer 320 disposed under the cushion layer 310 , and bonding the cushion layer 310 and the reinforcing layer 320 . It may include a first adhesive layer 340 and a second adhesive layer 330 for bonding the cushion layer 310 and the upper surface of the receiving groove 123 formed in the second plate 120 to each other.

The cushion layer 310 may be formed of conductive polyethylene.

The cushion layer 310 absorbs an impact generated when the PCB 10 and the second plate 120 come into contact, thereby preventing the PCB from being deformed and damaged. In addition, it is possible to prevent damage by alleviating the impact applied to the components mounted on the PCB.

The reinforcing layer 320 may be formed of antistatic polyethylene.

The reinforcing layer 320 may be formed of a material having a higher strength or hardness than the cushion layer 310 and excellent wear resistance.

In addition, the reinforcing layer 320 is located at the lowermost end of the cushion unit 300 , and firstly contacts the PCB 10 when the first jig unit 100 is lowered. Therefore, when in contact with the PCB 10, it is formed of an antistatic material so as not to generate static electricity, and serves to protect the PCB surface.

The first adhesive layer 340 and the second adhesive layer may be formed of an adhesive having conductivity.

In addition, when the lower end of the cushion layer 310 is in contact with the PCB 10 while the first jig unit 100 descends in a state that protrudes downward than the second plate 120, the thickness thereof is increased While shrinking, the second plate 120 may move upward.

In addition, the first jig unit 100 is disposed on the first plate 110, at least one pinhole is formed in the center, and the third plate 130 and the third plate 130 which are sequentially disposed on the top and bottom It further includes 4 plates 140, and between the first plate 110 and the fourth plate 140, a spacer 150 for separating the first plate 110 and the fourth plate 140 is provided. may include more.

An upper end of the inspection pin 160 may pass through the pinholes of the third plate 130 and the fourth plate 140 . Although the upper end of the inspection pin 160 passes through the third and fourth plates 130 and 140 , it may protrude toward the upper end of the third plate 130 or may not be exposed.

The spacer 150 may be disposed at both front and rear sides of the first plate 110 and the fourth plate 140 , respectively, to space the first plate 110 and the fourth plate 140 apart. .

A groove portion 125 concave upwardly is formed in the center of the bottom surface of the second plate 120 , and the lower end of the inspection pin 160 may be exposed through the groove portion 125 .

As described above, when the groove 125 and the receiving groove 123 are formed on the bottom surface of the second plate 120 , the groove 125 and the receiving groove 123 are formed between the groove 125 and the receiving groove 123 . In contrast, a protrusion 124 that protrudes downward relatively may be formed.

On the other hand, in the second jig unit 200, at least one pinhole is formed in the center, and the fifth plate 210, the sixth plate 220, and the sixth plate 220 are sequentially arranged on the upper and lower portions. The seventh plate 230 and the eighth plate 240, the sixth plate 220 and the seventh plate 230 arranged in succession on the upper and lower portions, and at least one pinhole formed in the center of the ), a spacer 250 that separates the sixth plate 220 and the seventh plate 230, and an upper end passing through the pinhole and exposed to the upper side of the fifth plate 210 It may include a pin 260 .

In addition, the upper end of the test pin 160 passing through the third plate 130 and the lower end of the test pin 260 passing through the eighth plate 240 are connected to a tester through a wire, The lower end of the inspection pin 160 exposed to the lower side of the second plate 120 and the upper end of the inspection pin 260 exposed to the upper side of the fifth plate 210 are to be connected to the contact point of the PCB 10 . can

In addition, although the upper end of the inspection pin 160 partially passes through the third plate 130 , it may protrude toward the upper end of the third plate 130 or may not be exposed. In addition, although the lower end of the inspection pin 260 partially passes through the eighth plate 240 , it may protrude toward the lower end of the eighth plate 240 or may not be exposed.

Accordingly, when the tester outputs the test signal (output signal), the signal is input to the contact point of the PCB 10 through a separate wire and through the test pins 160 and 260 . Then, the signal passing through the PCB 10 is again output through the inspection pins 160 and 260 at different positions, then transferred to a wire, and may or may not be finally input to the tester. In addition, the tester may compare the input signal and the output signal or determine whether the PCB 10 is defective according to whether the input signal is input.

In addition, at least a portion of the first jig unit 100 and the second jig unit 200 may be symmetrically disposed with respect to the PCB 10 .

For example, the first jig unit 100 and the second jig unit 200 may be formed to have a symmetrical overall configuration with respect to the PCB 10 .

As another example, the entire configuration of the first jig unit 100 and the second jig unit 200 may be symmetrical with respect to the PCB 10 , except for the inspection pins 160 and 260 .

As another example, the first jig unit 100 and the second jig unit 200 are to be formed so that the entire configuration is symmetrical with respect to the PCB 10 , except for the inspection pins 160 and 260 and the cushion unit 300 . can

Also, the arrangement of the inspection pins 160 of the first jig unit 100 may be different from the arrangement of the inspection pins 260 of the second jig unit 200 .

A plurality of contacts are formed at different positions on the upper and lower surfaces of the PCB 10 , and the arrangement of the inspection pins 160 of the first jig unit 100 is the position of the contacts formed on the upper surface of the PCB 10 . The arrangement of the inspection pins 260 of the second jig unit 200 formed to correspond to , may be formed to correspond to the position of the contact formed on the lower surface of the PCB 10 .

According to the present invention as described above, for the inspection of the PCB, even if the jig disposed on the upper or lower side of the PCB comes into contact with the surface of the PCB while moving, there is an advantage in that the surface of the PCB is not dented or pressed.

In addition, there is an advantage of solving the problem that the surface of the PCB is deformed and damaged by contact with the edge of the jig, and can reduce the defect rate of the PCB.

10: PCB
100: first jig unit
200: second jig unit
300: cushion part
310: cushion layer
320: reinforcing layer
330,340: adhesive layer

Claims (10)

In the PCB inspection jig comprising a first jig unit disposed on the upper side of the PCB, and a second jig unit disposed on the lower side of the PCB,
The first jig unit,
At least one pinhole is formed in the center, and the first plate and the second plate are arranged in succession on the upper and lower portions;
a lower end penetrating the pinhole and including an inspection pin exposed to the lower side of the second plate,
On the lower surface of the second plate, forming receiving grooves concave upwardly at both ends,
A cushion part is accommodated in the receiving groove,
The cushion part,
a cushion layer made of a cushion material;
a reinforcing layer disposed under the cushion layer;
a first adhesive layer bonding the cushion layer and the reinforcing layer;
a second adhesive layer bonding the cushion layer and the upper surface of the receiving groove formed in the second plate;
When the lower end of the cushion part is in contact with the PCB while the first jig unit descends in a state that protrudes downward from the second plate, the thickness of the PCB inspection jig is reduced.
The method of claim 1,
The height of the receiving groove is a PCB inspection jig that is formed smaller than the thickness of the cushion part.
The method of claim 1,
The receiving groove is a PCB inspection jig which is formed concavely inwardly at the lower end of both sides of the second plate.
delete The method of claim 1,
The cushion layer is a PCB inspection jig formed of conductive polyethylene.
The method of claim 1,
The reinforcing layer is a PCB inspection jig formed of antistatic polyethylene.
The method of claim 1,
The first adhesive layer and the second adhesive layer is a PCB inspection jig formed of an adhesive having conductivity.
The method of claim 1,
The first jig unit,
a third plate and a fourth plate disposed on the first plate, at least one pinhole formed in the center, and sequentially disposed on the upper part and the lower part;
It is disposed between the first plate and the fourth plate, further comprising a spacer separating the first plate and the fourth plate,
The inspection pin is a PCB inspection jig whose upper end passes through the pinholes of the third plate and the fourth plate.
9. The method of claim 8,
The spacer is a PCB inspection jig that is disposed on both sides of the front and rear of the first plate and the fourth plate, respectively, spaced apart the first plate and the fourth plate.
The method of claim 1,
A jig for PCB inspection in which a groove formed concavely upward is formed in the center of the second plate, and a lower end of the inspection pin is exposed through the groove.

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