CN112858877A

CN112858877A - Test fixture and test method for detecting PCB

Info

Publication number: CN112858877A
Application number: CN202110012463.XA
Authority: CN
Inventors: 张慈
Original assignee: Anhui Xiangfan Technology Co Ltd
Current assignee: Anhui Xiangfan Technology Co Ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-05-28

Abstract

The invention discloses a test fixture for detecting a PCB (printed circuit board), which comprises a bearing piece, an ejector pin, a display screen and a button switch, wherein a movable positioning structure and a sliding pressing positioning structure are arranged on the bearing piece, the movable positioning structure is used for fixing the PCB, and the sliding pressing positioning structure is used for pressing the movable positioning structure down to a welding hole of the PCB to be in close contact with the ejector pin. The invention has the beneficial effects that: through the first movable positioning structure and the second sliding pressing structure which are arranged on the bearing piece, the PCB is placed in the accommodating groove of the first movable structure during testing, and the movable handle of the second sliding pressing structure is pressed down to drive the first movable structure to move down so as to achieve the purpose that the welding hole of the PCB is in close contact with the thimble at the bottom. Compared with the mode of welding wires and wiring on the welding holes of the PCB, the test fixture eliminates the defects of wrong welding wires and wiring.

Description

Test fixture and test method for detecting PCB

Technical Field

The invention relates to the technical field of testing, in particular to a testing jig for detecting a PCB.

Background

For some electronic products, the PCB board needs to be tested to detect whether its data identification and some basic functions are normal. For a traditional test scheme, welding is usually performed through reserved welding holes of a PCB, then wiring and supplying power are performed, and reading detection is performed through a test instrument. When mass production is detected, the scheme is easy to cause welding errors and wiring errors, and a large amount of manpower and material resources are needed, so that the testing efficiency and the safety are influenced, and the cost is increased.

Disclosure of Invention

The invention aims to provide a test fixture for detecting a PCB, wherein the PCB is placed in a containing groove of a first movable structure during testing through a first movable positioning structure and a second sliding pressing structure which are arranged on a bearing piece, and the first movable structure is driven to move downwards through pressing a movable handle of the second sliding pressing structure so as to enable a welding hole of the PCB to be in close contact with a bottom thimble. Compared with the mode of welding wires and wiring on the welding holes of the PCB, the test fixture eliminates the defects of wrong welding wires and wiring.

The technical scheme of the invention is realized as follows:

a test fixture for detecting a PCB comprises a bearing piece, a thimble, a display screen and a button switch.

The bearing part is provided with a movable positioning structure and a sliding compression positioning structure, the movable positioning structure is used for fixing the PCB, and the sliding compression positioning structure is used for pressing the movable positioning structure down to the PCB welding hole to be in close contact with the thimble.

The thimble is used for being connected with PCB board solder hole.

The display screen is used for being connected with the PCB board so as to display results, and the PCB board is connected with an external power supply through the wiring pillar.

The button switch is used for controlling the power supply to be switched on and off.

Furthermore, the movable positioning structure comprises a containing groove, the surface of the containing groove is concave, and a positioning hole is formed in the containing groove.

The PCB board support device further comprises a sliding support column and a positioning support column, wherein the sliding support column is connected with the accommodating groove in a sliding mode and fixed on the surface of the bearing piece, the positioning support column is arranged in the positioning hole of the accommodating groove, and the PCB board is placed in the accommodating groove through the positioning support column.

Furthermore, a guide pillar is further arranged in the accommodating groove, surrounds the accommodating groove and is arranged on a perpendicular bisector of a semicircular arc formed by the two adjacent positioning pillars.

Furthermore, be provided with the thimble hole between direction pillar and the location pillar, the bottom that lies in the storage tank on the carrier is provided with the thimble with thimble hole matched with.

Furthermore, the sliding compression positioning structure comprises a positioning seat, a downward pressing sliding rod, a positioning column and a positioning sliding plate, wherein the positioning seat is connected with the sliding rod through a positioning side plate, one end, far away from the positioning side plate, of the sliding rod is fixedly connected with the surface of the bearing piece, the sliding rod is connected with the positioning sliding plate in a sliding mode, the downward pressing sliding rod is arranged on the surface of the positioning sliding plate, and the top end of the downward pressing sliding rod is connected with a movable handle.

Furthermore, the side surface of the positioning side plate is in sliding fit with the pressing slide rod through a connecting part.

Furthermore, the bottom of location slide is provided with a plurality of reference columns of mutually supporting with the PCB board, makes PCB board solder hole and thimble in close contact with.

A test method for inspecting a PCB board, comprising the steps of:

the method comprises the following steps: is connected with a power supply through a wiring support;

step two: placing the PCB in the accommodating groove through the positioning support column and the guide support column;

step three: pressing down the movable handle to drive the positioning sliding plate to move downwards, so that the PCB welding hole is in close contact with the bottom thimble, and the PCB is electrically connected with the power supply and the display screen;

step four: and pressing a button switch to supply power to the PCB, and reading the data identification of the PCB and whether some basic functions are normal or not through the display screen.

The invention has the beneficial effects that: through the first movable positioning structure and the second sliding pressing structure which are arranged on the bearing piece, the PCB is placed in the accommodating groove of the first movable structure during testing, and the movable handle of the second sliding pressing structure is pressed down to drive the first movable structure to move down so as to achieve the purpose that the welding hole of the PCB is in close contact with the thimble at the bottom. Compared with the mode of welding wires and wiring through welding holes of the PCB, the test fixture eliminates the defects of welding wires and wiring errors, the PCB can be completely placed in the accommodating groove of the first movable structure only in one mode under the control of the guide post and the positioning support post, the damage of the PCB caused by the placement errors is avoided, and the test safety is ensured. In addition, the test fixture is used for testing, the test fixture is very convenient and fast, a single person can quickly carry out large-batch test, welding wires and wiring links are saved, manpower and material resources are saved, and therefore the test efficiency is greatly improved, and the cost is saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a test fixture for inspecting a PCB;

FIG. 2 is a front view of a test fixture for inspecting a PCB;

FIG. 3 is a testing flow chart of a testing fixture for testing a PCB.

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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

According to an embodiment of the invention, a test fixture for detecting a PCB is provided.

Referring to fig. 1 to 3, a test fixture for inspecting a PCB according to an embodiment of the present invention includes a carrier 100, a thimble 300, a display 400, and a button switch 200.

The bearing member 100 is provided with a movable positioning structure 120 and a sliding pressing positioning structure 130, the movable positioning structure 120 is used for fixing the PCB, and the sliding pressing positioning structure 130 is used for pressing the movable positioning structure 120 down to the PCB welding hole to be in close contact with the thimble 300.

The thimble 300 is used for being connected with a welding hole of a PCB.

The display screen 400 is used for being connected with a PCB (printed circuit board) to display results, and the PCB is connected with an external power supply through a wiring support column.

The button switch 200 is used to control the power on and off.

Further, the movable positioning structure 120 includes a receiving groove 121, and the receiving groove 121 is recessed in surface and provided with a positioning hole.

Further, the PCB further includes a sliding support post 124 and a positioning support post 122, the sliding support post 124 is slidably connected to the receiving groove 121 and fixed on the surface of the carrier 100, the positioning support post 122 is disposed in the positioning hole of the receiving groove 121, and the PCB is placed in the receiving groove 121 through the positioning support post 122.

Further, a guide support post 123 is further disposed in the accommodating groove 121, and the guide support post 123 surrounds the accommodating groove 121 and is disposed on a perpendicular bisector of a semicircular arc formed by two adjacent positioning support posts 122.

Further, an ejector pin hole 125 is disposed between the guide support post 123 and the positioning support post 122, and an ejector pin 125 matched with the ejector pin hole 125 is disposed at the bottom of the containing groove 121 on the carrier 100.

Further, slide and compress tightly location structure 130 includes positioning seat 134, pushes down slide bar 138, reference column 12 and location slide plate 137, positioning seat 134 is connected with slide bar 131 through location curb plate 136, slide bar 131 keeps away from the one end of location curb plate 136 and is connected with the fixed surface that holds carrier 100, sliding connection has location slide plate 137 on slide bar 131, the surface of location slide plate 137 is provided with pushes down slide bar 138, the top that pushes down slide bar 138 is connected with movable handle 133.

Further, the side surface of the positioning side plate 136 is slidably engaged with the push-down sliding rod 138 through the connecting portion 15.

Further, the bottom end of the positioning sliding plate 137 is provided with a plurality of positioning columns 132 matched with the PCB, so that the PCB soldering holes are in close contact with the thimble 300.

Referring to fig. 1, a test fixture according to an embodiment of the present invention is used for testing a PCB to detect whether data recognition and some basic functions of the PCB are normal, and the PCB can be used in an electronic product. The test fixture comprises a bearing part 100, a button switch 200, a thimble 300 and a display screen 400. The carrier 100 is provided with a movable positioning structure 120 and a sliding and pressing positioning structure 130, the movable positioning structure 120 is used for placing a PCB, and the sliding and pressing positioning structure 130 is used for sliding and pressing the movable positioning structure 120. The push button switch 200 is used to control the power supply to be turned on. The thimble 300 is used for connecting with a welding hole of a PCB and acts as a conducting wire. The display screen 400 is connected to the PCB through a thimble connection line, and is used to display the detection result of the PCB whether normal or not in the aspects of data identification, some basic functions, and the like.

The movable positioning structure 120 includes a receiving groove 121, a positioning pillar 122, a guiding pillar 123 and a sliding pillar 124. The surface of the receiving groove 121 is partially recessed by a predetermined depth. The positioning support column 122 and the guiding support column 123 are respectively formed by an opening in the receiving groove 121 and a mounting support column around the receiving groove, and serve as the only fixing and guiding device for correctly placing the PCB.

The sliding pressing and positioning structure 130 includes a positioning seat 134, a pressing rod 138, a positioning column 12 and a positioning sliding plate 137. The positioning column 132 is installed at the bottom end of the positioning sliding plate 137, and is connected with the pressing slide bar 138 through the movable handle 133, so that the movable handle 133 is pressed downwards to drive the movable handle to move downwards so as to enable the PCB board soldering hole to be in close contact with the bottom thimble 300.

In the testing process, firstly, the testing fixture is powered by the external power supply, then the PCB is placed in the accommodating groove 121 through the positioning support column 122 and the guiding support column 123, and the movable handle 133 is pressed down to drive the positioning sliding plate 137 to move down so as to make the PCB solder hole tightly contact with the bottom thimble 300. The test result can be observed by pressing the button switch 200 through the display screen. Therefore, by providing the movable positioning structure 120 and the sliding pressing positioning structure 130 on the carrier 100, the PCB is placed in the receiving groove 121, and the electrical connection with the PCB is achieved through the thimble 300.

Compared with the traditional mode of welding wire connection of the PCB welding holes, the jig eliminates the defects of fussy welding and easy error, prevents the phenomenon of power-on damage of the PCB caused by welding wrong wires, and improves the safety and the test efficiency.

A test method for inspecting a PCB board, comprising the steps of:

By providing the movable positioning structure 120 and the sliding pressing positioning structure 130 on the carrier 100, the PCB is placed at the movable positioning structure 120, and the electrical connection with the PCB is achieved through the ejector pin 300. Compared with the traditional mode of welding wire connection of the PCB welding holes, the jig eliminates the defects of fussy welding and easy error, prevents the phenomenon of power-on damage of the PCB caused by welding wrong wires, and improves the safety and the test efficiency.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A test fixture for detecting a PCB is characterized by comprising a bearing piece (100), a thimble (300), a display screen (400) and a button switch (200);

the bearing piece (100) is provided with a movable positioning structure (120) and a sliding pressing positioning structure (130), the movable positioning structure (120) is used for fixing the PCB, and the sliding pressing positioning structure (130) is used for pressing the movable positioning structure (120) down to a PCB welding hole to be in close contact with the thimble (300);

the thimble (300) is used for being connected with a PCB welding hole;

the display screen (400) is used for being connected with a PCB (printed circuit board) to display results, and the PCB is connected with an external power supply through a wiring support;

the button switch (200) is used for controlling the power supply to be switched on and off.

2. The testing fixture for inspecting PCB of claim 1, wherein the movable positioning structure (120) comprises a receiving cavity (121), the receiving cavity (121) is recessed and has positioning holes.

3. The testing fixture for testing the PCB according to claim 2, further comprising a sliding pillar (124) and a positioning pillar (122), wherein the sliding pillar (124) is slidably connected to the receiving slot (121) and fixed on the surface of the carrier (100), the positioning pillar (122) is disposed in the positioning hole of the receiving slot (121), and the PCB is placed in the receiving slot (121) through the positioning pillar (122).

4. The test fixture for inspecting PCB of claim 3, wherein said receiving slot (121) is further provided with a guiding pillar (123), said guiding pillar (123) surrounds said receiving slot (121) and is disposed on a vertical bisector of a semi-circular arc formed by two adjacent positioning pillars (122).

5. The testing fixture for inspecting PCB of claim 4, wherein a thimble hole (125) is disposed between the guiding pillar (123) and the positioning pillar (122), and a thimble (125) is disposed on the bottom of the containing slot (121) of the carrier (100) and is matched with the thimble hole (125).

6. The test fixture for detecting the PCB according to claim 1, wherein the sliding compression positioning structure (130) comprises a positioning seat (134), a pressing-down sliding rod (138) and a positioning sliding plate (137), the positioning seat (134) is connected with the sliding rod (131) through a positioning side plate (136), one end of the sliding rod (131) far away from the positioning side plate (136) is fixedly connected with the surface of the bearing member (100), the sliding rod (131) is connected with the positioning sliding plate (137) in a sliding manner, the surface of the positioning sliding plate (137) is provided with the pressing-down sliding rod (138), and the top end of the pressing-down sliding rod (138) is connected with a movable handle (133).

7. The test fixture for inspecting PCB of claim 6, wherein the side of said positioning side plate (136) is slidably engaged with the down slide bar (138) through the connecting portion (15).

8. The testing fixture for testing the PCB according to claim 7, wherein the bottom end of the positioning sliding plate (137) is provided with a plurality of positioning posts (132) matched with the PCB so that the solder holes of the PCB are in close contact with the thimble (300).

9. A test method for detecting a PCB board is characterized by comprising the following steps: