CN215728622U

CN215728622U - PCBA test fixture

Info

Publication number: CN215728622U
Application number: CN202121802645.9U
Authority: CN
Inventors: 李海清
Original assignee: Huaxin Tuoyuan Tianjin Technology Co ltd
Current assignee: Huaxin Tuoyuan Tianjin Technology Co ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-02-01
Anticipated expiration: 2031-08-03

Abstract

The utility model provides a PCBA test fixture, which comprises a PCB assembly board, a fixing clamp, an isolation component and a probe, wherein the PCB assembly board is provided with at least two layers of printed circuit boards which are arranged in parallel side by side, the fixing clamp is fixedly arranged on the topmost printed circuit board, the bottommost printed circuit board is fixedly provided with a test circuit, the printed circuit boards are fixedly overlapped together through the isolation component, the probe penetrates through the printed circuit boards, one end of the probe is fixedly connected with the test circuit, the other end of the probe is electrically connected with the PCBA board, and the fixing clamp is used for clamping the PCBA board so that the test point of the PCBA board is abutted to the probe. The utility model can test the PCBA board, has high manufacturing speed and low cost, is provided with a test circuit, greatly improves the test efficiency, saves the research and development cost, and is mainly used for the PCBA board which is not completely shaped in research and development and small batch.

Description

PCBA test fixture

Technical Field

The utility model relates to the technical field of electronic element test fixtures, in particular to a PCBA test fixture.

Background

PCBA is an abbreviation of english Printed Circuit Board + Assembly, and is a Printed Circuit Board without any element by pcb (Printed Circuit Board), and a Circuit Board with electronic components is finally completed through operations of SMT patch, DIP package, and the like. The finished PCBA cannot be directly used for production and assembly, individual unqualified products exist, and the qualification rate of finished products is greatly influenced if the finished PCBA is directly used. The reasons for these defects are mainly insufficient solder, missing solder, short circuit, flip chip, dislocation, wrong material usage of electronic components, high temperature deformation, etc. The quality of the PCBA needs to be checked, time is consumed for checking by using workers one by one, omission is easy to occur, and much manpower and space are occupied. In the research and development and small batch stage, the PCBA has the possibility of being changed, so that the special test fixture is expensive, long in time, high in communication cost, not used in the later stage and the like, and therefore a new test fixture of the simple PCBA board is needed to be used for supplementing the short board.

SUMMERY OF THE UTILITY MODEL

In view of the above, the problem to be solved by the present invention is to provide a PCBA test fixture which can be used in the period of incomplete development and small batch of PCBA, has a fast manufacturing speed, a small amount of money, and an additional test circuit, greatly improves the test efficiency, and saves the development cost.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a PCBA test fixture, includes PCB group board, fixation clamp, keeps apart subassembly and probe, PCB group board sets up the printed circuit board that arranges side by side into at least two-layer parallel, the top layer is located to the fixation clamp printed circuit board, the bottom printed circuit board has set firmly test circuit, each layer printed circuit board passes through keep apart the fixed pile of subassembly and establish together, the probe wears to establish printed circuit board, the one end of probe with test circuit fixed connection, the other end electric connection of probe has the PCBA board, the fixation clamp is used for blocking the PCBA board so that the test point of PCBA board with the probe is inconsistent.

In the utility model, preferably, the two fixing clamps are arranged oppositely, the fixing clamps are elastically connected with elastic pieces through springs, one end of each spring is fixedly connected with the elastic piece, and the other end of each spring is fixedly connected with the fixing clamp.

In the utility model, preferably, the PCB assembly is configured as a first PCB and a second PCB, and the probe is sequentially and fixedly inserted through the first PCB and the second PCB and penetrates out of the second PCB.

In the present invention, preferably, the isolation components are arranged in a plurality of groups, each group of the isolation components includes a first isolation column and a second isolation column, the first isolation column is fixedly disposed between the first PCB and the second PCB, and the second isolation column is fixedly connected to the second PCB.

In the utility model, preferably, studs are arranged in the first isolation column and the second isolation column in a penetrating manner, the studs extend to the outside of the first PCB, and the studs are fixedly connected with the first PCB through nuts.

In the present invention, preferably, the probe is provided as a copper needle.

In the present invention, preferably, the height of the second isolation column is greater than the height of the test circuit and the height of the probe penetrating through the second PCB.

In the present invention, preferably, the fixing clip is fixed to the printed circuit board at the topmost layer by a bolt.

In the present invention, preferably, the test circuit is fixed to the printed circuit board at the lowermost layer by soldering.

The utility model has the advantages and positive effects that: the PCB group board is set into at least two layers of printed circuit boards which are arranged in parallel and side by side, the printed circuit boards are fixed through the isolation component, the isolation component can ensure that the position of a welded probe is accurate, the printed circuit board at the topmost layer is provided with a fixing clamp for fixing the PCBA board to be tested, the effect of quickly fixing the PCBA board can be realized, the operation is convenient and flexible, then the test point of the PCBA board is communicated with the test circuit through the probe, and further whether the PCBA board is qualified can be quickly judged; the PCBA board can be quickly fixed and the test points and the probes can be accurately positioned through mutual matching of the PCBA board, the fixing clamp, the isolating component and the probes, so that the PCBA board can be conveniently tested, the manufacturing speed is high, the cost is low, a test circuit is attached, the test efficiency is greatly improved, the research and development cost is saved, and the PCBA board fixing clamp is mainly used when the PCBA is not completely shaped in research and development and small batch.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a perspective view of the overall structure of a PCBA test fixture of the present invention;

FIG. 2 is a schematic diagram of a front structure of a PCBA test fixture according to the present invention;

FIG. 3 is a schematic top view of a PCBA test fixture according to the present invention;

FIG. 4 is a schematic bottom view of a PCBA test fixture according to the present invention.

In the figure: 1. a fixing clip; 2. a probe; 3. a test circuit; 4. a first isolation column; 5. a second isolation column; 6. a nut; 7. a first PCB board; 8. a second PCB board; 9. PCBA board.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, 2 and 4, the utility model provides a PCBA test fixture, which comprises a PCB assembly board, a fixing clamp 1, an isolation component and a probe 2, wherein the PCB assembly board is provided with at least two layers of printed circuit boards which are arranged in parallel, the fixing clamp 1 is fixedly arranged on the topmost printed circuit board, the bottommost printed circuit board is fixedly provided with a test circuit 3, the printed circuit boards are fixedly overlapped together through the isolation component, the probe 2 penetrates through the printed circuit boards, one end of the probe 2 is fixedly connected with the test circuit 3, the other end of the probe 2 is electrically connected with a PCBA board 9, and the fixing clamp 1 is used for clamping the PCBA board 9 so that the test point of the PCBA board 9 is abutted against the probe 2. The PCB group board is set into at least two layers of printed circuit boards which are arranged in parallel and side by side, the printed circuit boards are fixed through an isolation component which can ensure the accurate position of a welded probe 2, the printed circuit board at the topmost layer is provided with a fixing clamp 1 for fixing a PCBA board 9 to be tested, the effect of quickly fixing the PCBA board 9 can be realized, the operation is convenient and flexible, then the test point of the PCBA board 9 is communicated with a test circuit 3 through the probe 2, and further the qualification of the PCBA board 9 can be quickly judged, the quick fixation of the PCBA board 9 and the accurate positioning between the test point and the probe 2 can be realized through the mutual matching among the PCBA board, the fixing clamp 1, the isolation component and the probe 2, thereby the PCBA board 9 can be conveniently tested, the manufacturing speed is high, the cost is low, the test circuit 3 is attached, and the test efficiency is greatly improved, and the development cost is saved.

In this embodiment, further, the fixing clip 1 is provided as two oppositely arranged, the fixing clip 1 is elastically connected with an elastic sheet through a spring, one end of the spring is fixedly connected with the elastic sheet, and the other end of the spring is fixedly connected with the fixing clip 1. On fixing clamp 1 is put to the alignment of PCBA board 9 that will await measuring, push down PCBA board 9 and make its edge withstand shell fragment compression spring, the spring produces elastic deformation, the shell fragment removes to the direction that is close to fixing clamp 1, along with PCBA board 9 continues downstream until PCBA board 9 is less than the shell fragment when, the shell fragment resumes initial position under the restoring force effect of spring, PCBA board 9's test point is inconsistent with probe 2 this moment, thereby realize PCBA board 9's the spacing fixed in position, press the shell fragment and can take out PCBA board 9, shell fragment and spring constitute the unblock structure of fixing clamp 1 jointly, can realize PCBA board 9's position locking and unblock through the mutually supporting between the two.

In this embodiment, further, the PCB assembly is set as a first PCB 7 and a second PCB 8, and the probe 2 sequentially and fixedly penetrates through the first PCB 7 and the second PCB 8 and penetrates out of the second PCB 8. The first PCB 7 is used as the topmost layer printed circuit board and is mainly used for fixing the fixing clamp 1 and the probes 2, in addition, LEDs, displays, switches and other devices interacting with users can be placed, the second PCB 8 is used as the bottommost layer printed circuit board and is mainly used for fixing the test circuit 3, the test circuit 3 corresponding to the test point characteristic configuration detected according to needs is arranged, and therefore whether the PCBA board 9 is qualified or not can be detected rapidly.

In this embodiment, further, the isolation components are arranged into a plurality of groups, each group of isolation components includes a first isolation column 4 and a second isolation column 5, the first isolation column 4 is fixedly disposed between the first PCB 7 and the second PCB 8, and the second isolation column 5 is fixedly connected to the second PCB 8. If only one layer of printed circuit board is arranged in the middle, the printed circuit board is difficult to ensure to be vertically arranged due to the fact that the thickness of the printed circuit board is small, and the printed circuit board is easy to deform in the actual use test process, therefore, the first isolation column 4 is arranged to divide the printed circuit boards of the adjacent layers at equal intervals, and two points are arranged in a straight line, so that the probe 2 cannot incline when penetrating through the printed circuit board, can accurately contact the test point of the PCBA board 9, and meanwhile solves the problem that the printed circuit board is easy to deform.

As shown in fig. 3, in this embodiment, further, studs are inserted into the first isolation post 4 and the second isolation post 5, the studs extend to the outside of the first PCB 7, the studs are fixedly connected to the first PCB 7 through nuts 6, and the nuts are used to fix the topmost PCB, so that the test fixture is integrated.

In this embodiment, furtherly, probe 2 sets up to the copper needle, has good electric conductive property through setting up probe 2 to the copper needle, is convenient for test PCBA board 9, and the one end that has the spring with probe 2 is fixed through welding and bottommost layer printed circuit board, and the scalable copper post probe head of probe 2 other end wears out topmost layer printed circuit board, and after putting into the PCBA board 9 that awaits measuring, PCBA board 9 can contact the probe and compress the probe head to can ensure the reliability of test point contact on probe 2 and the PCBA board 9.

In the present embodiment, further, the height of the second isolation column 5 is greater than the height of the test circuit 3 and the height of the probe 2 penetrating through the second PCB board 8. The second isolation column 5 mainly plays a role in supporting the bottom of the jig, the test circuit 3 is fixedly mounted at the bottom of the bottommost printed circuit board, the test circuit and the probe head need to be higher than the PCB, and the isolation column can support the test jig.

In this embodiment, further, the fixing clip 1 is fixed with the topmost printed circuit board by bolts, and the fixing clip 1 is used for limiting or releasing the limiting function of the PCBA board.

In this embodiment, the test circuit 3 is fixed to the bottom printed circuit board by soldering, the test circuit 3 is used to test a signal processing circuit designed on the PCBA board 9, and the signal processing circuit includes a power supply voltage circuit, a voltage detection circuit, a reference voltage supply circuit, a programming line lead-out circuit, and the like, and the test circuit 3 is designed according to the actual requirements of the PCBA board 9 to be tested.

The working principle and the working process of the utility model are as follows: when in use, firstly, the bottommost printed circuit board is placed on the isolation column, in the embodiment, the first PCB 7 is used as the topmost printed circuit board, the second PCB 8 is used as the bottommost printed circuit board, specifically, the second PCB 8 is placed on the second isolation column 5, the first isolation column 4 is placed on the corresponding position of the second PCB 8 in an aligning way and the first isolation column 4 is screwed, then the printed circuit boards are sequentially arranged in parallel and side by side, the fixing clamp 1 is fixedly arranged on the topmost printed circuit board, the nut 6 is placed on the stud but not screwed, the PCBA 9 to be tested is placed on the fixing clamp 1 in an aligning way, the edge of the PCBA 9 is pressed against the elastic sheet to be compressed, the elastic sheet is restored to the initial position under the restoring force of the spring when the PCBA 9 is lower than the elastic sheet along with the continuous downward movement of the PCBA 9, and the probe 2 is placed along the direction from the bottommost printed circuit board to the topmost printed circuit board, one end that probe 2 has the flexible head is towards PCBA board 9, the position of adjustment first PCB board 7 makes probe 2 can aim at with the PCBA board 9's that awaits measuring test point, screw up nut 6 after aiming at, press down about 2mm of probe then through welded fastening to second PCB board 8 on, probe 2 wears to establish each layer printed circuit board in proper order and wears out first PCB board 7, then press down the shell fragment and take off PCBA board 9, pass through welded fastening with probe 2 and first PCB board 7 together, if still be provided with other PCB boards between first PCB board 7 and the second PCB board 8, then other PCBs only play the assistance-localization real-time effect, therefore need not to be in the same place with probe 2 welding, the whole installation process of tool is accomplished to the top. The specific test process is as follows: during the test, the power supply makes test circuit 3 normally work, and the PCBA board 9 that will await measuring is fixed with the tool through fixation clamp 1 fast, makes the examination point that awaits measuring of PCBA board 9 contradict with the tip of probe 2, judges through observing test circuit 3's human-computer interaction interface or external terminal whether performance parameters such as the electric current of PCBA board 9, voltage are qualified, after obtaining the test result, press the shell fragment and take off PCBA board 9, put into new PCBA board 9 again and continue the test, has greatly improved PCBA board 9's detection efficiency.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.

Claims

1. The utility model provides a PCBA test fixture, its characterized in that includes PCB group board, fixation clamp (1), keeps apart subassembly and probe (2), PCB group board sets up the printed circuit board that arranges side by side into at least two-layer parallel, fixation clamp (1) sets firmly in the top layer printed circuit board, bottom layer printed circuit board has set firmly test circuit (3), each layer printed circuit board passes through keep apart the fixed stack of subassembly and establish together, probe (2) are worn to establish printed circuit board, the one end of probe (2) with test circuit (3) fixed connection, the other end electric connection of probe (2) has PCBA board (9), fixation clamp (1) are used for blocking PCBA board (9) are so that the test point of PCBA board (9) with probe (2) counterbalance.

2. The PCBA test fixture according to claim 1, characterized in that the fixing clamps (1) are arranged in two opposite directions, the fixing clamps (1) are elastically connected with elastic pieces through springs, one ends of the springs are fixedly connected with the elastic pieces, and the other ends of the springs are fixedly connected with the fixing clamps (1).

3. The PCBA test fixture according to claim 1, wherein the PCBs are arranged into a first PCB (7) and a second PCB (8), and the probe (2) is sequentially and fixedly arranged through the first PCB (7) and the second PCB (8) and penetrates out of the second PCB (8).

4. A PCBA test fixture according to claim 3, wherein the spacer elements are arranged in groups, each group of spacer elements comprising a first spacer column (4) and a second spacer column (5), the first spacer column (4) being fixedly arranged between the first PCB (7) and the second PCB (8), the second spacer column (5) being fixedly connected to the second PCB (8).

5. A PCBA test fixture as claimed in claim 4, characterised in that studs are arranged through the first and second spacer columns (4, 5), the studs extend to the outside of the first PCB (7), and the studs are fixedly connected with the first PCB (7) through nuts (6).

6. A PCBA test fixture according to claim 1, characterised in that the probes (2) are provided as copper pins.

7. A PCBA test fixture as claimed in claim 4, characterised in that the height of the second spacer columns (5) is greater than the height of the test circuit (3) and the height of the probes (2) passing out of the second PCB board (8).

8. A PCBA test fixture according to claim 1, characterised in that the retaining clip (1) is secured to the topmost printed circuit board by bolts.

9. A PCBA test fixture according to claim 1, characterised in that the test circuit (3) is secured to the lowermost printed circuit board by soldering.