CN108072832A - A kind of test fixture of the pcb board with stamp hole - Google Patents

Abstract

The invention relates to a test device, in particular to a test fixture for a PCB board with a stamp hole. The test fixture includes a test substrate and a special-shaped pogo pin arranged on the test substrate. The test substrate is provided with a notch penetrating the test substrate. The special-shaped pogo pins are distributed along the edge of the notch; the special-shaped pogo pins are bent from a long strip of conductive material, and the special-shaped pogo pins include a fixed part and a deformation part. The free section linked with the deformed section, the deformed section is located between the restricted section and the free section, the plug-in section and the deformed section are respectively located on both sides of the restricted section; the fixed part is connected to the test substrate through the plug-in section, and the deformed part is connected to the Stamp holes on the PCB are abutted to limit the position of the PCB relative to the test substrate. The invention increases the contact area between the special-shaped pogo pin and the stamp hole on the PCB, can improve the fixing effect of the PCB, and improves the reliability of contact.

Description

A test fixture for a PCB board with stamp holes

technical field

The invention relates to a test device, in particular to a test fixture for a PCB board with stamp holes.

Background technique

PCB (Printed Circuit Board), the Chinese name is printed circuit board, also known as printed circuit board, is an important electronic component, a support for electronic components, and a carrier for electrical connections of electronic components.

With the development of electronic technology, the function of the chip is becoming more and more powerful, and the peripheral circuits are also increasing. Putting these important functions on a core board and using the welding method of stamp holes can solve the problem of miniaturization and reliable connection. However, since the stamp holes are distributed on the edge of the PCB board, the spacing between the stamp holes is too dense, and the pads are small. It is relatively difficult to test the function of the empty board through SMT, and then through the entire process of DIP plug-in (referred to as PCBA). At present, the test racks provided on the market all use thimbles to position the PCB board. When positioning, the thimble The end touches the stamp hole of the PCB board, and the thimble is parallel to the upper surface substrate of the PCB board. This method has the following defects: the thimble tooling is expensive, the manufacturing process is complicated, and high precision is required; the contact area between the thimble and the stamp hole is small, and the reliability is low. Low, not easy to maintain, not conducive to mass production testing.

Contents of the invention

For the above problems of the prior art, the object of the present invention is to provide a test fixture for a PCB board with a stamp hole, the fixture adopts special-shaped pogo pins to cooperate with the stamp holes of the PCB board to increase the contact between the special-shaped pogo pins and the stamp holes area, can locate the PCB board conveniently and quickly.

The invention provides a test fixture for a PCB board with a stamp hole, comprising a test substrate, the test substrate is provided with a notch penetrating through the test substrate, and it is characterized in that the test substrate is also provided with multiple a special-shaped pogo pin, a plurality of the special-shaped pogo pins are distributed along the edge of the notch;

The special-shaped pogo pin is bent from a strip-shaped conductive material. The special-shaped pogo pin includes a fixing part and a deformation part. The fixing part includes a restricting section and a plug-in section. A linked free section, the deformation section is located between the restriction section and the free section, and the plug-in section and the deformation section are respectively located on both sides of the restriction section;

The fixing part is connected to the test substrate through the plug-in section, and the deformation part abuts against the stamp hole on the PCB board through the deformation section to limit the position of the PCB board relative to the test substrate.

Further, the test substrate is provided with multiple sets of mounting holes, the mounting holes are distributed along the edge of the notch, and the special-shaped pogo pins are connected to the test substrate through the mounting holes.

Preferably, each set of mounting holes includes a first mounting hole and a second mounting hole;

The plug-in section is fixed in the first installation hole, the restriction section and the deformation section are located above the test substrate, and the free section is located in the second installation hole and can be installed in the second installation hole. The deformation section is used to abut against the stamp hole on the PCB, and can be deformed when pressed by the stamp hole, thereby driving the free section to move in the second mounting hole.

Preferably, the restricting section and the inserting section form a battlement shape.

Preferably, the plug-in section passes through the first installation hole and is fixed by connecting material, and the second installation hole is a long through hole.

Preferably, the deformation section includes a support section and an abutment section, the support section is in contact with the restriction section, the abutment section is in contact with the free section, the abutment section is inclined toward the notch and is in contact with the An acute angle is formed between the test substrates, the abutment section is used to abut with the stamp hole on the PCB board, and the support section is used to provide support opposite to the direction of the extrusion force when the abutment section is squeezed force.

Preferably, the included angle between the abutting section and the test substrate is less than 80°.

Further, the test fixture further includes an ejection mechanism, the ejection mechanism is arranged below the test substrate, and the ejection rod of the ejection mechanism is facing the notch of the test substrate.

Preferably, the notch is rectangular, and the mounting holes and special-shaped pogo pins are arranged along at least one set of opposite sides of the notch.

Preferably, the cross-section of the special-shaped pogo pin is circular, and the diameter of the cross-section is 0.2mm-2mm.

Due to the above technical scheme, the present invention has the following beneficial effects:

(1) The test fixture provided by the present invention includes a test substrate and a special-shaped pogo pin arranged on the test substrate. The special-shaped pogo pin is bent from a deformable strip-shaped conductive material, and the fixing part of the special-shaped pogo pin is connected to the test substrate. Fixed, the deformation part of the special-shaped pogo pin can be elastically deformed when being squeezed. Place the PCB board above the test substrate so that the deformed part of the special-shaped pogo pin enters the stamp hole on the edge of the PCB board. By applying force to the PCB board, the PCB board is brought closer to the test substrate. The PCB board is in the process of moving to the test substrate. The deformed part of the special-shaped pogo pin is squeezed, so that the angle between the abutting section of the deformed part and the stamp hole gradually becomes smaller and even reaches the state where the abutting section and the inner wall of the stamp hole are completely attached, thus using the special-shaped pogo pin Clamping the PCB board, compared with the method of fixing the PCB board with thimbles in the prior art, the present invention increases the contact area between the special-shaped pogo pin and the stamp hole on the PCB board, which can improve the fixing effect of the PCB board and improve the reliability of the contact sex.

(2) Since the special-shaped pogo pins are distributed along the edge of the notch of the test substrate, the special-shaped pogo pins can be automatically positioned in the stamp holes during the test. After the test is completed, the upward ejection force is applied to the PCB board through the ejection mechanism, and the PCB can be made The plate is separated from the special-shaped pogo pin, which is easy to disassemble and maintain.

(3) Compared with the thimble pin, the special-shaped pogo pin of the present invention has a novel and unique structure, but does not have high requirements on the manufacturing process and precision, is easy to manufacture, and has low production cost, which is beneficial to mass production and testing.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the following will briefly introduce the drawings required for the embodiments or the description of the prior art. Apparently, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings according to these drawings without any creative work.

Fig. 1 is a kind of structural schematic diagram that is used for the test fixture of the PCB board that has stamp hole provided by the embodiment of the present invention;

Fig. 2 is a schematic structural view of a special-shaped pogo pin provided by an embodiment of the present invention;

Fig. 3 is a schematic structural view of a mounting hole on a test substrate provided by an embodiment of the present invention;

4 is a partial schematic view of a test fixture for a PCB board with stamp holes provided by an embodiment of the present invention;

Fig. 5 is a diagram of the use state of a test fixture for a PCB board with a stamp hole provided by an embodiment of the present invention;

Fig. 6 is a view of the use state of a test fixture for a PCB board with stamp holes provided by an embodiment of the present invention.

In the figure: 1-test substrate, 2-notch, 3-special-shaped pogo pin, 4-installation hole, 5-PCB board, 6-stamp hole, 31-fixing part, 32-deformation part, 311-first limiting section , 312-the second limiting section, 313-the first plugging section, 314-the second plugging section, 321-supporting section, 322-abutting section, 323-free section, 41-the first fixing hole, 42-the first Two fixing holes, 43-the second mounting hole, 44-welding hole, 7-ejector rod.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first" and "second" in the specification, claims and drawings of the present invention are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion.

Example

This embodiment provides a test fixture for a PCB board with stamp holes, please refer to Figures 1-6, the test fixture includes a test substrate 1, and the test substrate 1 is provided with a notch 2 that runs through the test substrate , the test substrate 1 is also provided with a plurality of special-shaped pogo pins 3, and a plurality of the special-shaped pogo pins 3 are distributed along the edge of the notch 2; the special-shaped pogo pins 3 are bent by strip-shaped conductive materials The special-shaped pogo pin 3 includes a fixed part 31 and a deformed part 32, the fixed part 31 is connected to the test substrate 1, and the deformed part 32 is used to abut against the stamp hole 6 on the PCB board 5 to limit the PCB board. 5 relative to the position of the test substrate 1. Preferably, the notch 2 is rectangular, and the mounting holes 4 and special-shaped pogo pins 3 are arranged along at least one set of opposite sides of the notch 2 .

Further, the test substrate 1 is provided with multiple sets of mounting holes 4, the mounting holes 4 are distributed along the edge of the notch 2, and the special-shaped pogo pins 3 pass through the mounting holes 4 and the test substrate 1 connection. The mounting holes 4 include a first mounting hole 4 and a second mounting hole 43 . The fixing part 31 includes a restricting section and an inserting section, and the restricting section and the inserting section form a battlement shape. The deformation part 32 includes a deformation section and a free section 323 linked with the deformation section, the deformation section is located between the restriction section and the free section 323, and the insertion section and the deformation section are respectively located at both sides of the restriction section. The plug-in section is fixed in the first installation hole 4, the restriction section and the deformation section are located above the test substrate 1, and the free section 323 is located in the second installation hole 43 and can be placed in the second installation hole 43. said second mounting hole 43, said deformation section is used to abut against stamp hole 6 on PCB board 5, and can be deformed when being squeezed by said stamp hole 6, thereby driving said free section 323 in The second mounting hole 43 moves inside.

As a preferred embodiment, the plug-in section passes through the first installation hole 4 and is fixed by connecting material, and the second installation hole 43 is a long through hole. The deformation section includes a support section 321 and an abutment section 322, the support section 321 is in contact with the restriction section, the abutment section 322 is in contact with the free section 323, and the abutment section 322 faces the notch 2 Inclined and form an acute angle with the test substrate 1, the abutment section 322 is used to abut with the stamp hole 6 on the PCB board 5, and the support section 321 is used to be squeezed on the abutment section 322 Provides a support force in the opposite direction to the extrusion force.

As a preferred implementation manner, the angle between the abutting section 322 and the test substrate 1 is less than 80°.

Further, the test fixture further includes an ejection mechanism, the ejection mechanism is arranged under the test substrate 1 , and the ejection rod 7 of the ejection mechanism faces the notch 2 of the test substrate 1 .

As a preferred embodiment, the cross-section of the special-shaped pogo pin 3 is circular, and the diameter of the cross-section is 0.2mm-2mm.

The test fixture provided in this embodiment includes a test substrate and a special-shaped pogo pin arranged on the test substrate. The special-shaped pogo pin is bent from a deformable strip-shaped conductive material, and the fixing part of the special-shaped pogo pin is connected and fixed to the test substrate. The deformation part of the special-shaped pogo pin can be elastically deformed when being squeezed. Place the PCB board above the test substrate so that the deformed part of the special-shaped pogo pin enters the stamp hole on the edge of the PCB board. By applying force to the PCB board, the PCB board is brought closer to the test substrate. The PCB board is in the process of moving to the test substrate. The deformed part of the special-shaped pogo pin is squeezed, so that the angle between the abutting section 322 of the deformed part and the stamp hole is gradually reduced, and even the state where the abutting section 322 is completely attached to the inner wall of the stamp hole can be achieved, thereby utilizing the special-shaped The pogo pins grip the PCB board.

Compared with the method of fixing the PCB board with thimbles in the prior art, the test fixture of this embodiment increases the contact area between the special-shaped pogo pin and the stamp hole on the PCB board, which can improve the fixing effect of the PCB board and improve the reliability of the contact . Since the special-shaped pogo pins are distributed along the edge of the notch of the test substrate, the special-shaped pogo pins can be automatically positioned in the stamp hole during the test. After the test is completed, the upward ejection force is applied to the PCB board through the ejection mechanism, and the PCB board can be aligned with the special-shaped pogo pin. The pogo pins are separated for easy disassembly and maintenance. Compared with the thimble pin, the special-shaped pogo pin of the present invention has a novel and unique structure, but does not require high manufacturing technology and precision, is easy to manufacture, and has low production cost, which is beneficial to mass production and testing.

Example

This embodiment provides a test fixture of a PCB board with stamp holes, the test fixture is used to fix the PCB board, wherein the PCB board is a rectangular plate, stamp holes are evenly distributed on the edge of the PCB board, and the shape of the stamp holes can be teeth half hole. Fig. 1 is a schematic structural view of a test fixture for a PCB board with stamp holes provided by an embodiment of the present invention, please refer to Fig. 1, the test fixture of this embodiment includes a test substrate 1, a special-shaped spring arranged on the test substrate The needle 3 and the ejection mechanism arranged under the test substrate.

Wherein, the test substrate can be made through a PCB process, or can be made through an insulating board. The test substrate is a rectangular plate, and the middle part of the test substrate 1 is provided with a rectangular notch 2, the notch 2 runs through the upper and lower surfaces of the test substrate 1, and the positions corresponding to the four corners of the test substrate 1 are provided with fixing holes, and the test substrate 1 is also provided with There are multiple sets of mounting holes, and the multiple sets of mounting holes are evenly distributed along the four sides of the notch 2 . Figure 2 shows a group of mounting holes, please refer to Figure 2, each group of mounting holes includes the third mounting hole 44, the first mounting hole and the second mounting hole 43 arranged in sequence, the first mounting hole is divided into the first fixing hole 41 and the second fixing hole 42, the third fixing hole 44 and the first fixing hole 41 are preferably circular holes, and the second fixing hole 42 and the second fixing hole 43 are preferably bar-shaped holes. A third mount 44 is used for soldering test wires.

The special-shaped pogo pins 3 are connected to the test substrate 1 through the mounting holes 4 . Specifically, the special-shaped pogo pin 3 is made of a strip-shaped conductive material with good elasticity, the cross-section of the conductive material is circular, and the diameter of the cross-section is 0.2mm-2mm. Figure 2 is a schematic diagram of the structure of the special-shaped pogo pin, the special-shaped pogo pin 3 is formed by bending a conductive material, and is divided into a fixed part 31 and a deformed part 32, wherein the fixed part 31 is used for connecting with the test substrate, and the deformed part 32 is used for connecting with the PCB The stamp hole 6 on the plate abuts. As a preferred implementation manner, the shape of the fixing part 31 may be a battlement shape, and the shape of the deformation part 32 is approximately "Λ" or "︹". As a preferred implementation manner, the conductive material may be brass wire or nickel-plated wire.

Wherein, the fixed part 31 of the special-shaped pogo pin 3 includes a first insertion section 313, a first restriction section 311, a second insertion section 314 and a second restriction section 312 connected in sequence, and the deformation part 32 of the special-shaped pogo pin 3 includes a deformation segment and free segment 323 , the two ends of the deformation segment are respectively connected to the second limiting segment 312 and the free segment 323 . Wherein, the strip-shaped conductive material is sequentially divided into a first end portion, a first middle portion, a second middle portion and a second end portion, and the first plug-in section 313 is formed by bending the first end portion of the conductive material to one side, The second insertion section 314 is formed by bending the first middle part of the conductive material to one side, the deformation section is formed by bending the second middle part of the conductive material to one side, and the free section 323 is formed by bending the second end of the conductive material. The conductive material part between a plug-in segment 313 and the second plug-in segment 314 is the first restricting segment 311, the conductive material part between the second plug-in segment 314 and the deformation segment is the second restricting segment 312, and the first plug-in segment The connection section 313 , the second insertion section 314 and the free section 323 are located on one side of the first insertion section 313 , and the deformation section is located on the other side of the first insertion section 313 . Preferably, the first restriction section and the second restriction section may be coaxial.

The first insertion section 313 is inserted into the first fixing hole 41, the second insertion section 314 is inserted into the second fixing hole 42, and the first insertion section 313 and the first fixing hole 41 are soldered or glued. For fixing, the second insertion section 314 and the second fixing hole 42 are fixed by soldering or gluing, and both the first limiting section 311 and the second limiting section 312 are attached to the upper surface of the test substrate 1 . On the basis of the plug-in fit, the connection material is further fixed, which can improve the fit tightness between the plug-in section and the fixing hole, make the fit between the special-shaped pogo pin and the first mounting hole more stable, and improve the reliability of the connection . The free section 323 enters into the second mounting hole and can move along the long axis of the second mounting hole.

The deformation section includes a support section 321 and an abutment section 322, the support section 321 is in contact with the restriction section, the abutment section 322 is in contact with the free section 323, and the abutment section 322 faces the notch 2 Inclined and form an acute angle of less than 80° with the test substrate 1, the abutment section 322 is used to abut with the stamp hole 6 on the PCB, and the support section 321 is used to abut against the abutment section 322 When squeezed, it provides support in the opposite direction of the squeeze force.

The ejector mechanism includes an ejector rod 7 and a drive mechanism. The ejector rod 7 is located below the test substrate 1 and faces the notch 2 of the test substrate 1. The drive mechanism is used to drive the ejector rod 7 to move up and down. .

When using the test fixture of this embodiment to test the PCB board, the PCB board is first placed above the test substrate, so that the abutment section 322 of the special-shaped pogo pin enters the stamp hole 6 on the edge of the PCB board. At this time, the abutment section 322 and An included angle is formed between the inner walls of the stamp holes 6, and then a force is applied from top to bottom on the PCB board, so that the PCB board approaches the test substrate, and the PCB board touches the abutting section 322 of the special-shaped pogo pin in the process of approaching the test substrate Squeeze to make the abutting section 322 move away from the direction of the notch 2, and the angle between the abutting section 322 and the stamp hole 6 gradually becomes smaller (even reaching the point where the abutting section and the inner wall of the stamp hole are fully fitted. state), since the position of the support section 321 connected to the abutment section 322 is relatively fixed with the test substrate 1, the support section 321 can provide support force for the abutment section 322, and the abutment section 322 is made of elastic material, so the abutment The segment 322 can clamp the PCB board to fix the PCB board.

In the prior art method of fixing the PCB board with a thimble, the end of the thimble is in contact with the stamp hole of the PCB, and the contact area between the thimble and the oil stamp hole does not exceed the area of the end of the thimble, which easily leads to unstable contact and contact reliability. Low, and this method requires high installation accuracy and high cost. Compared with the method of fixing the PCB board with thimbles in the prior art, the solution of the present invention increases the contact area between the special-shaped pogo pins and the stamp holes on the PCB, and can improve the reliability of the contact between the special-shaped pogo pins and the PCB board.

Since the special-shaped pogo pins are distributed along the edge of the notch of the test substrate, the position of the special-shaped pogo pins and the notch of the test substrate exactly corresponds, so the special-shaped pogo pins can be automatically positioned in the stamp hole during the test, and it is not easy to slip out of the stamp hole , its contact is reliable and easy to maintain. After the test is completed, the driving mechanism drives the ejector rod to move upwards to apply an upward ejection force to the PCB board to separate the PCB board from the special-shaped pogo pins, which is easy to operate, high in efficiency, and easy to maintain.

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above examples only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the scope of the patent for the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. a kind of test fixture for being used for the pcb board with stamp hole including test substrate (1), is set on the test substrate (1) There is the notch (2) through the test substrate, which is characterized in that be additionally provided with multiple deformed spring pins on the test substrate (1) (3), edge distribution of multiple deformed spring pins (3) along the notch (2)；

The deformed spring pin (3) is bent by strip conductive material, and deformed spring pin (3) includes fixed part (31) and shape Change portion (32), the fixed part (31) include restriction section and inserting section, the deformations (32) include deformation section and with the shape Become the free segment (323) of section linkage, the deformation section is between the restriction section and the free segment (323), the grafting Section and the deformation section are located at the both sides of the restriction section respectively；

The fixed part (31) is connected by the inserting section with the test substrate (1), and the deformations (32) are by described Deformation section abuts to limit position of the pcb board (5) compared with test substrate (1) with the stamp hole (6) on pcb board.

2. a kind of test fixture for being used for the pcb board with stamp hole according to claim 1, which is characterized in that described It tests substrate (1) and is equipped with multigroup mounting hole (4), edge distribution of the mounting hole (4) along the notch (2) is described different Shape spring needle (3) is connected by the mounting hole (4) with the test substrate (1).

3. a kind of test fixture for being used for the pcb board with stamp hole according to claim 2, which is characterized in that every group Mounting hole (4) includes the first mounting hole (4) and the second mounting hole (43)；

The inserting section is fixed in first mounting hole (4), and the restriction section and deformation section are located at the test substrate (1) Top, the free segment (323) is located in second mounting hole (43) and can be moved in second mounting hole (43), For being abutted with the stamp hole (6) on pcb board when the stamp hole (6) is subject to squeeze shape can occur for the deformation section Become, so as to which the free segment (323) be driven to be moved in second mounting hole (43).

4. a kind of test fixture for being used for the pcb board with stamp hole according to claim 3, which is characterized in that described Restriction section and inserting section form city wall pile shape.

5. a kind of test fixture for being used for the pcb board with stamp hole according to claim 3, which is characterized in that described Inserting section passes through first mounting hole (4) and passes through connecting material and is fixed, and second mounting hole (43) is strip Through hole.

6. a kind of test fixture for being used for the pcb board with stamp hole according to claim 3, which is characterized in that described Deformation section includes supporting section (321) and connecting section (322), and the supporting section (321) connects with restriction section, the connecting section (322) connect with free segment (323), the connecting section (322) to the notch (2) tilt and with it is described test substrate (1) it Between form acute angle, the connecting section (322) with the stamp hole (6) on pcb board for abutting, supporting section (321) use In the support force opposite with squeezing force direction of the offer when connecting section (322) is squeezed.

7. a kind of test fixture for being used for the pcb board with stamp hole according to claim 6, which is characterized in that described Angle between connecting section (322) and the test substrate (1) is less than 80 °.

8. a kind of test fixture for being used for the pcb board with stamp hole according to claim 1, which is characterized in that described Test fixture further includes ejecting mechanism, and the ejecting mechanism is arranged on the lower section of the test substrate (1), the ejection of ejecting mechanism The notch (2) of substrate (1) is tested described in bar (7) face.

9. a kind of test fixture for being used for the pcb board with stamp hole according to claim 2, which is characterized in that described Notch (2) is set for rectangle, the mounting hole (4) and deformed spring pin (3) along at least one set of opposite side of the notch (2).

10. a kind of test fixture for being used for the pcb board with stamp hole according to claim 1, which is characterized in that described The cross section of deformed spring pin (3) is circular, a diameter of 0.2mm-2mm of the cross section.