CN213581045U

CN213581045U - Test fixture

Info

Publication number: CN213581045U
Application number: CN202022279201.3U
Authority: CN
Inventors: 霍军军
Original assignee: Dongguan Huabei Electronic Technology Co Ltd
Current assignee: Dongguan Huabei Electronic Technology Co Ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-06-29
Anticipated expiration: 2030-10-13

Abstract

The utility model discloses a the utility model provides a test fixture for the test of PCBA board, include along vertical direction from bottom to top set gradually the accredited testing organization on the base, first pressing mechanism and second pressing mechanism all are the telescopic and set up on the base, accredited testing organization is demountable installation on the base, accredited testing organization is including installing the PCB board on the base and setting up a plurality of spring thimbles on the PCB board, the length of spring thimble differs, the PCBA board of the examination of awaiting measuring is placed on first pressing mechanism, second pressing mechanism moves and pushes down in order to drive first pressing mechanism to make the PCBA board that is located on first pressing mechanism switch on with the contact of spring thimble. The utility model discloses a test fixture, easy to assemble and maintenance not only guarantee test fixture's product property ability, have saved the manpower, have improved the efficiency of follow-up maintenance anchor clamps moreover.

Description

Test fixture

Technical Field

The utility model relates to a check out test set of electronic product especially relates to a test fixture.

Background

In the testing of PCBA boards, the products are typically contacted by probes on a test fixture. In the prior art, probes are generally directly fixed on a base, the probes and the base are fixed in a friction mode, and each probe is connected with the outside through a welding wire; in the using process, after the probe detects the PCBA for multiple times, multiple friction actions between the probe and the base can generate looseness, and the using requirement of the initial height cannot be met; in addition, the probe and the base can influence the welding wire after loosening, and the probe is connected with the outside through the welding wire, so that the problems of poor maintainability, troublesome operation, low efficiency and the like exist.

Therefore, a test fixture which is easy to install and maintain and does not affect the test performance due to multiple uses is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a test fixture of product performance just can be guaranteed in easy to assemble and maintenance.

In order to achieve the above object, the utility model provides a test fixture for the test of PCBA board, include along vertical direction from bottom to top set gradually accredited testing organization on the base, first pressing mechanism and second pressing mechanism, first pressing mechanism and the setting that second pressing mechanism all can reciprocate on the base, accredited testing organization is demountable installation on the base, accredited testing organization is including installing the PCB board on the base and setting up at least one spring thimble on the PCB board, wherein, first pressing mechanism is used for bearing the PCBA board that awaits measuring, and second pressing mechanism can drive first pressing mechanism and push down when the downstream, makes the spring thimble runs through logical groove on the first pressing mechanism and switches on with the PCBA board contact that awaits measuring.

Compared with the prior art, the utility model discloses a test fixture, including demountable installation in the accredited testing organization of base, accredited testing organization includes PCB board and spring thimble, contacts through the PCBA board that spring thimble and the examination of awaiting measuring for the test point of spring thimble and PCBA board switches on, thereby can realize testing test actions such as serial ports communication, power, switching on and shutting down. The spring ejector pin is attached to the PCB, has a certain telescopic function when contacting the PCBA, cannot move up and down to cause looseness due to the fact that the spring ejector pin abuts against the PCBA, cannot change height due to repeated use, and cannot influence testing effect due to repeated use. In addition, the whole testing mechanism is in a modular design and is detachably mounted on the base, and the PCB can be directly detached and replaced after being damaged, so that the efficiency of subsequent maintenance of the clamp is improved. The utility model discloses a test fixture, easy to assemble and maintenance not only guarantee test fixture's product property ability, have saved the manpower, have improved the efficiency of follow-up maintenance anchor clamps moreover.

Preferably, the testing mechanism further comprises a connector, and the connector and the spring ejector pin are attached to the PCB. The connector and the spring ejector pin are attached to the PCB, the spring ejector pin and the connector are electrically connected through the PCB, the connection is stable, and the structure is simple.

Preferably, the test fixture is externally connected with a test device for testing, and the spring thimble and a lead connected with the test device are detachably mounted on the connector. The spring thimble is led to the PCB board electricity with the connector and is connected, and the wire that the spring thimble is connected with external test equipment can be put through the spring thimble through the connector, and the wire is detachable and installs on the connector, simple to operate, and the maintenance is changed conveniently.

Preferably, the PCB board is fixed to the base by bolts. The PCB board passes through the bolt and installs on the base, and not only the structure is firm, can not influence the use, and convenient the change moreover.

Preferably, the first pressing mechanism comprises a bearing plate for bearing the PCBA to be tested, and the bearing plate is connected to the base through at least one elastically telescopic guide rod. The bearing plate on the first pressing mechanism is used for placing the PCBA to be detected, the guide rod for supporting the bearing plate is of an elastic telescopic structure, so that when force acts on the bearing plate, the bearing plate can move downwards to enable the PCBA to contact the spring ejector pins, certain elastic buffering force is further provided, and damage to the PCBA or the spring ejector pins due to downward moving direct acting force is avoided.

Preferably, the through groove is penetratingly arranged on the bearing plate for the spring thimble to penetrate through. The spring thimble passes logical groove and switches on treating the test point on the PCBA board.

Preferably, the face of the adapting plate far away from the testing mechanism is also provided with at least one supporting piece for placing the PCBA to be tested, and the supporting piece protrudes out of the upper surface of the adapting plate so that the PCBA placed on the supporting piece protrudes out of the upper surface of the supporting piece. The PCBA board supports through the protruding support piece that stretches out and accept the board upper surface, can avoid PCBA board direct contact in accepting the board for when the pressfitting, can not crush the PCBA board.

Preferably, one end of the support member is provided with an installation part matched with the PCBA board to be tested, and the installation part is used for reinforcing the installation of the PCBA board to be tested on the support member. In order to prevent the PCBA board from being stably placed on the support and not displaced, the support is provided with an installation part matched with the PCBA board.

Preferably, the second pressing mechanism includes a power member, a mounting plate, and a pressing member engaged with the supporting member, the power member is mounted on the mounting plate and connected to the pressing member, wherein the power member can drive the pressing member to move downward to contact the supporting member when moving downward. The power part acts to move the pressing part downwards and act on the supporting part, so that the PCBA board is stably moved downwards between the supporting part and the pressing part and contacts the spring thimble for testing.

Preferably, the second pressing mechanism further comprises a supporting rod for supporting the mounting plate, and the supporting rod is elastically and telescopically arranged on the base. The second pressing mechanism is provided with the elastic and telescopic supporting rod, so that the second pressing mechanism has elastic buffering force when pressing downwards again, and the PCBA board cannot be damaged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a test fixture according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a test fixture according to another embodiment of the present invention.

Fig. 3 is a partial structural schematic view of fig. 2.

Fig. 4 is a schematic structural diagram of a test fixture according to still another embodiment of the present invention.

Description of reference numerals:

100. testing the clamp; 101. a base; 102. a PCBA board to be tested;

10. a testing mechanism; 11. a spring thimble; 12. a PCB board; 121. a bolt; 13. a connector; 131. a screw hole;

20. a first pressing mechanism; 21. a bearing plate; 211. a through groove; 22. a support member; 221. an installation part; 23. a guide bar; 24. a first reset member;

30. a second pressing mechanism; 31. a power member; 32. mounting a plate; 33. a pressing part; 34. a support bar; 35. a second reset member.

Detailed Description

In order to explain technical contents and structural features of the present invention in detail, the following description is made with reference to the embodiments and the accompanying drawings.

Referring to fig. 1-3, a test fixture 100 for testing a PCBA board 102 to be tested is provided. The test fixture 100 comprises a base 101, and a test mechanism 10, a first pressing mechanism 20 and a second pressing mechanism 30 which are sequentially arranged from bottom to top along the vertical direction of the base 101. Wherein, the first pressing mechanism 20 and the second pressing mechanism 30 can be arranged on the base 101 in a way of moving up and down, the testing mechanism 10 is detachably mounted on the base 101, and the testing mechanism 10 is in a detachably mounted structure, so that the mounting, maintenance and replacement are more convenient. For example, the first pressing mechanism 20 and the second pressing mechanism 30 may be telescopically disposed on the base 101. Specifically, the testing mechanism 10 includes a PCB 12 mounted on the base 101 and at least one pogo pin 11 disposed on the PCB 12, and when the number of pogo pins 11 is plural, the height of each pogo pin 11 is set according to the testing requirement of the testing point of the PCBA board 102 to be tested. The first pressing mechanism 20 is used for bearing the PCBA board 102 to be tested, the PCBA board 102 to be tested is placed on the first pressing mechanism 20, the first pressing mechanism 20 and the second pressing mechanism 30 are arranged on the base 101 in a vertically movable mode, the second pressing mechanism 30 acts to drive the first pressing mechanism 20 and the PCBA board 102 to be tested on the first pressing mechanism 20 to move downwards together until the PCBA board 102 to be tested contacts the spring ejector pins 11 for testing, and the spring ejector pins 11 contact the PCBA board 102 to be tested and conduct the test points, so that whether the PCBA board 102 to be tested is a qualified product is detected. It can be understood that, a through slot 211 is provided on the first pressing mechanism 20 for the spring thimble 11 to pass through, and the second pressing mechanism 30 can drive the first pressing mechanism 20 to press down when moving downward, so that the spring thimble 11 passes through the through slot 211 on the first pressing mechanism 20 to be in contact with the PCBA board 102 to be tested.

After technical scheme more than adopting, the utility model discloses a test fixture 100, including demountable installation in the accredited testing organization 10 of base 101, and accredited testing organization 10 includes PCB board 12 and spring thimble 11, contacts with the PCBA board 102 that awaits measuring through spring thimble 11 for spring thimble 11 switches on with the test point of the PCBA board 102 that awaits measuring, thereby can realize testing test serial ports communication, power, testing actions such as switch-on and switch-off. The spring ejector pin 11 is attached to the PCB 12, the spring ejector pin 11 has a certain telescopic function when contacting the PCBA board 102 to be tested, looseness caused by up-and-down movement of the spring ejector pin 11 against the PCBA board 102 to be tested is avoided, the height of the spring ejector pin 11 is not changed due to repeated use, and the test effect cannot be influenced by repeated use of the spring ejector pin 11. The wire that spring thimble 11 and external test equipment are connected is detachable and sets up on PCB board 12, and the circuit has the problem and can directly dismantle the change wire, need not the bonding wire maintenance. In addition, the whole testing mechanism 10 is in a modular design, and the PCB 12 can be directly disassembled and replaced after the PCB 12 is damaged, so that the efficiency of subsequent maintenance of the clamp is improved. The utility model discloses a test fixture 100, easy to assemble and maintenance not only guarantee test fixture 100's product property ability, have saved the manpower, have improved the efficiency of follow-up maintenance anchor clamps moreover.

Referring to fig. 4, in some alternative embodiments, the testing mechanism 10 includes a probe for testing, the probe is directly inserted and fixed on the base 101, and the probe does not have a retractable spring inside, so that when the probe contacts the PCBA board 102 to be tested, an abutting downward force is generated, and after the testing fixture 100 is pressed for multiple times, the probe loosens, so that the thimble deviates, and the requirement of the initial height between the probe and the testing point cannot be met, thereby affecting the measuring result. On the other hand, the probe is connected with external test equipment through wire welding for communication, and when the welding wire is loosened, the maintenance is troublesome, and the maintainability is poor.

Referring to fig. 1 to 3, in some alternative embodiments, the PCB 12 is fixed to the base 101 by bolts 121, and the PCB 12 is mounted on the base 101 by the bolts 121 and has a detachable structure, which is not only convenient to mount and stable in structure, but also convenient to replace. The testing mechanism 10 further comprises a connector 13, the connector 13 and the spring ejector pin 11 are both attached to the PCB 12, and the attaching structure is simple and stable. The pogo pin 11 and the connector 13 are electrically connected to the PCB 12, and the pogo pin 11 and the connector 13 are electrically connected to the PCB 12. Specifically, the spring thimble 11 passes through the wire with external test equipment and is connected, and the wire of connecting is the screw 131 that is used for installing the wire of dismantlement on connector 13, is provided with on the connector 13, and the wire is detachable and secretly changes in the screw 131 on connector 13, the installation and the dismantlement of being more convenient for. The wire connected with the external test equipment of the spring thimble 11 can be communicated to the spring thimble 11 through the connector 13, so that the welding process is omitted, the operation is more convenient and faster, and the efficiency is improved; and the wire is the detachable and installs on connector 13, and it is more convenient to maintain the change.

Referring to fig. 1 to 3, in some alternative embodiments, the first pressing mechanism 20 includes a receiving plate 21 for receiving a PCBA board 102 to be tested, and the receiving plate 21 is connected to the base 101 through at least one elastically telescopic guide rod 23. Specifically, the guide bar 23 for connecting the base 101 and the receiving plate 21 may be installed in a linear bearing, so that when the first pressing mechanism 20 is pressed down, the guide bar 23 slides up and down in the vertical direction along the linear bearing. The outer surface of the guide rod 23 is sleeved with an elastic first reset piece 24, the first reset piece 24 can be a spring, and when the first pressing mechanism 20 is pressed down, the first reset piece 24 can play a role of elastic buffering, so that the PCBA board 102 to be tested is prevented from being directly and rigidly contacted with the spring ejector pins 11 and damaged by stress. When the pressing force of the first pressing mechanism 20 is removed, the first restoring member 24 applies an upward restoring force to the supporting plate 21 to drive the supporting plate 21 to restore. In other embodiments, the guide rod 23 may be provided with a spring, and has a structure similar to the spring thimble 11, when the receiving plate 21 presses down the guide rod 23, the guide rod 23 is elastically lowered, so as to not only perform an elastic buffering function, but also drive the receiving plate 21 to reset when the pressing force of the first pressing mechanism 20 is removed.

Referring to fig. 3, in some alternative embodiments, a through groove 211 for the pogo pin 11 to pass through is formed on the receiving plate 21. The through groove 211 is formed in the receiving plate 21 for receiving the PCBA board 102 to be tested, and the spring ejector pin 11 directly penetrates through the through groove 211 to be in contact with the PCBA board 102 to be tested, so that the spring ejector pin 11 is conducted to a point to be tested on the PCBA board 102 to be tested, and the test device is simple in structure and reasonable in design.

Referring to fig. 1 to 3, in some alternative embodiments, the face of the socket plate 21 remote from the testing mechanism 10 is further provided with at least one support member 22 for placing the PCBA board 102 to be tested, the support member 22 projecting out of the upper surface of the socket plate 21 so that the PCBA board 102 to be tested placed on the support member 22 projects out of the upper surface of the support member 22. One end of the supporting member 22 is connected to the receiving plate 21, the upper surface of the supporting member 22 is provided with a mounting portion 221 matched with the PCBA board 102 to be tested, and the PCBA board 102 to be tested is stably placed on the supporting member 22 through the mounting portion 221. In this embodiment, four corners of the PCBA board 102 to be tested are provided with mounting holes matched with the mounting portion 221, the PCBA board 102 to be tested is mounted on the mounting portion 221 through the mounting holes and is located on the supporting member 22, so that the PCBA board 102 to be tested is placed on the supporting member 22, the structure is stable, and a certain distance is reserved between the PCBA board 102 to be tested and the receiving plate 21, thereby preventing the PCBA board 102 to be tested from directly contacting the receiving plate 21, and preventing the PCBA board 102 to be tested from being crushed during pressing.

Referring to fig. 1 to 3, in some alternative embodiments, the second pressing mechanism 30 includes a power member 31, a pressing member 33 engaged with the supporting member 22, and a mounting plate 32 for connecting the power member 31 and the pressing member 33. The pressing members 33 are mounted on the mounting plate 32 and face the support member 22, and the number of the pressing members 33 is the same as that of the support member 22. Wherein, the power component 31 is installed on the side wall of the base 101 and connected with the pressing component 33 through the installation plate 32, and the power component 31 can be a hydraulic cylinder or an air cylinder, etc. The power member 31 is actuated to move the press member 33 downward and to drive the press member 33 downward until the press member 33 contacts the support member 22, thereby securing the PCBA board 102 to be tested between the support member 22 and the press member 33. It will be appreciated that the power member 31 is actuated to move the press member 33 downwardly and against the support member 22, and to move the first press mechanism 20 with the support member 22 down to contact the spring ejector pins 11 of the PCBA board 102 to be tested. During the downward movement of the PCBA board 102 to be tested, the PCBA board 102 to be tested is stably placed between the support member 22 and the press fitting member 33 without displacement, and the PCBA board 102 to be tested moves downward to the contact spring ejector pins 11 for various tests.

Referring to fig. 1 to fig. 3, in some alternative embodiments, the second pressing mechanism 30 further includes a supporting rod 34 for assisting to support the mounting plate 32, the pressing member 33 is connected to the power member 31 through the mounting plate 32, and the supporting rod 34 is elastically and retractably disposed on the base 101, so as to make the overall structure more stable. The outside cover at bracing piece 34 is equipped with and is elastic second piece 35 that resets, and second piece 35 that resets can be the spring, and when power component 31 pushed down, the second piece 35 that resets can play the effect of elastic buffer to avoid the direct rigid and support piece 22 contact of piece 33 of closing. When the force of the downward pressing of the power member 31 is removed, the second reset member 35 will drive the mounting plate 32 to reset. In other embodiments, the supporting rod 34 may be provided with a built-in spring, and the structure is similar to the spring thimble 11, when the power element 31 presses the supporting rod 34, the supporting rod 34 is elastically lowered, so as to not only play a role of elastic buffering, but also drive the mounting plate 32 to reset when the pressing force of the power element 31 is removed.

As shown in fig. 1 to 4, the utility model discloses a test fixture 100, including demountable installation in the accredited testing organization 10 of base 101, and accredited testing organization 10 includes PCB board 12, spring thimble 11 and connector 13, contacts with the PCBA board 102 that awaits measuring through spring thimble 11 for spring thimble 11 switches on with the test point of the PCBA board 102 that awaits measuring, thereby can realize testing test serial ports communication, power, testing actions such as switching on and shutting down. The spring ejector pin 11 and the connector 13 are both attached to the PCB 12, the spring ejector pin 11 has a certain telescopic function when contacting the PCBA board 102 to be tested, looseness caused by up-and-down movement of the spring ejector pin 11 against the PCBA board 102 to be tested is avoided, the height of the spring ejector pin 11 cannot be changed due to repeated use, and the test effect cannot be influenced by repeated use of the spring ejector pin 11. The wire that spring thimble 11 and external test equipment are connected is detachable and is connected on connector 13, and the direct wire of changing when the circuit has the problem need not the bonding wire maintenance. In addition, the whole testing mechanism 10 is in a modular design, and the PCB 12 can be directly disassembled and replaced after the PCB 12 is damaged, so that the efficiency of subsequent maintenance of the clamp is improved. The utility model discloses a test fixture 100, easy to assemble and maintenance not only guarantee test fixture 100's product property ability, have saved the manpower, have improved the efficiency of follow-up maintenance anchor clamps moreover.

The above disclosure is only a preferred embodiment of the present invention, and the scope of the claims of the present invention should not be limited thereby, and all the equivalent changes made in the claims of the present invention are intended to be covered by the present invention.

Claims

1. The utility model provides a test fixture for the test of PCBA board, its characterized in that includes along vertical direction from bottom to top set gradually in the accredited testing organization on the base, first pressing mechanism and second pressing mechanism, first pressing mechanism with the setting that second pressing mechanism all can reciprocate on the base, accredited testing organization is demountable installation in on the base, accredited testing organization including install in PCB board on the base with set up in at least one spring thimble on the PCB board, first pressing mechanism is used for bearing the PCBA board of awaiting measuring, just second pressing mechanism can drive when the lapse, first pressing mechanism pushes down, makes the spring thimble run through logical groove on the first pressing mechanism with the PCBA board contact of awaiting measuring switches on.

2. The test fixture of claim 1, wherein the testing mechanism further comprises a connector, the connector and the pogo pin are attached to the PCB, and the pogo pin and the connector are electrically connected through the PCB.

3. The test fixture of claim 2, wherein the test fixture is externally connected with a test device for testing, and the pogo pins are detachably mounted on the connector.

4. The test fixture of claim 1, wherein the PCB board is bolted to the base.

5. The test fixture of claim 1, wherein the first press-fit mechanism includes a receiving plate for receiving the PCBA board to be tested, the receiving plate being connected to the base by at least one resiliently flexible guide rod.

6. The test fixture of claim 5, wherein the through-slot is opened on the receiving plate for the pogo pin to pass through.

7. A test fixture as claimed in claim 5, in which the face of the adapter plate remote from the test mechanism is further provided with at least one support for the PCBA board to be tested, the support projecting above the upper surface of the adapter plate such that a PCBA board placed on the support projects above the upper surface of the support.

8. The test fixture of claim 7, wherein one end of the support is provided with a mounting portion for mating with the PCBA board to be tested, the mounting portion being configured to reinforce the mounting of the PCBA board to be tested on the support.

9. The test fixture of claim 7, wherein the second pressing mechanism comprises a power member, a mounting plate, and a pressing member engaged with the support member, the power member being mounted on the mounting plate and connected to the pressing member, wherein the power member can move the pressing member downward to contact the support member when moving downward.

10. The test fixture of claim 9, wherein the second pressing mechanism further comprises a support rod for supporting the mounting plate, the support rod being elastically and telescopically disposed on the base.