CN219369922U

CN219369922U - Test fixture for circuit board through hole

Info

Publication number: CN219369922U
Application number: CN202223240281.7U
Authority: CN
Inventors: 赵志刚; 文东升
Original assignee: Suzhou Kelinyuan Electronic Co ltd
Current assignee: Suzhou Kelinyuan Electronic Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-07-18
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses a test fixture for a through hole of a circuit board, which belongs to the technical field of circuit board test and comprises projection boards and lamp boards which are arranged at intervals and in parallel; the lamp panel is used for emitting parallel light beams to act on the circuit board to be tested, and the parallel light beams can pass through the through holes on the circuit board to be tested and are displayed on the projection board. The setting through lamp plate and projection board can make things convenient for the staff to test whether the through-hole lacks on the circuit board that awaits measuring, and simple structure, and the test result is accurate, is fit for using widely.

Description

Test fixture for circuit board through hole

Technical Field

The utility model relates to the technical field of circuit board testing, in particular to a testing jig for a circuit board through hole.

Background

In the process of manufacturing the circuit board, a plurality of through holes are required to be formed on the surface of the circuit board for inserting and welding the electrical components in the mounting process, so that the through holes are required to be checked after the circuit board is produced, and whether hole blocking or hole leakage exists or not is required. Because the through holes are too many, personnel are easy to leak when checking, and the circuit board is not easy to detect in batches.

Through retrieval, the patent application number 2022207195998. X proposes a detection tool for a through hole of a circuit board, comprising a platform, wherein two rails for transporting the circuit board are connected to the platform, and a detection assembly is arranged between the two rails; the detection component comprises a PIN needle and a needle tube matched with the PIN needle for use, the PIN needle is connected between the two rails through a shell, the needle tube is connected above the rails through a cover plate, a driving piece is further arranged between the rails, the driving piece can drive the PIN needle to vertically move up and down along the height direction of the rails, so that the PIN needle corresponds to the needle tube one by one, and a circuit board placed between the PIN needle and the needle tube is detected. The technical problems that the detection of the through holes of the circuit board is difficult and the batch detection cannot be realized are solved.

However, in the prior art, more probes are required to be used, the structure is complex, and the phenomenon of needle clamping may occur when the probes are used, so that the detection is inaccurate.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide a test fixture for a through hole of a circuit board, which can avoid the problems that more probes are needed to be used, the structure is complex, and the probes possibly have the phenomenon of clamping pins during use, so that the detection is inaccurate.

The utility model adopts the following technical scheme:

a test fixture for a circuit board through hole comprises a projection board and a lamp board which are arranged at intervals and in parallel;

the lamp panel is used for emitting parallel light beams to act on the circuit board to be tested, and the parallel light beams can pass through the through holes on the circuit board to be tested and are displayed on the projection board.

Further, the test fixture further comprises a base and a top seat, the projection plate is fixedly arranged at the top of the base, and the lamp panel is fixedly arranged at the bottom of the top seat;

at least two stand columns are fixed between the base and the top seat, and each stand column is provided with a supporting structure for supporting the circuit board to be tested.

Further, the supporting structure comprises supporting pieces arranged on the upright posts, and the supporting pieces are provided with supporting parts for placing circuit boards to be tested.

Further, the support piece is a sliding sleeve, and the sliding sleeve is arranged on the upright post in a sliding sleeve mode.

Further, the sliding sleeve is provided with a sliding hole, a rubber bushing is fixed on the inner wall of the sliding hole, and the upright post is arranged in the rubber bushing in a sliding manner.

Further, a locking bolt is connected to the sliding sleeve in a threaded mode, and the threaded end of the locking bolt abuts against the outer wall of the upright post.

Further, the supporting part is a supporting cylinder, the supporting cylinder is fixedly arranged on the outer side wall of the sliding sleeve, and a supporting rod for placing the circuit board to be tested is horizontally and movably inserted in the supporting cylinder.

Further, each upright post is provided with a scale which is vertically arranged.

Compared with the prior art, the utility model has the beneficial effects that:

the setting through lamp plate and projection board can make things convenient for the staff to test whether the through-hole lacks on the circuit board that awaits measuring, and simple structure, and the test result is accurate, is fit for using widely.

Drawings

FIG. 1 is a schematic diagram of a test fixture for a through hole of a circuit board according to the present utility model;

FIG. 2 is a front view of a test fixture for a through hole of a circuit board according to the present utility model;

fig. 3 is a schematic structural view of the support structure in fig. 1 and 2.

In the figure: 1. a base; 2. a projection plate; 3. a top base; 4. a lamp panel; 5. a column; 6. a sliding sleeve; 601. a rubber bushing; 7. a support rod; 8. a locking bolt; 9. a support cylinder; 901. an adjustment aperture; 10. a graduated scale; 11. and the circuit board to be tested.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.

In the description of the present application, it should be understood that the terms "top," "bottom," "inner," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The test fixture for circuit board through holes as shown in fig. 1-3 comprises a projection board 2 and a lamp board 4 which are arranged at intervals and in parallel, wherein the lamp board 4 is used for emitting parallel light beams to act on a circuit board 11 to be tested, and the parallel light beams can pass through the through holes on the circuit board 11 to be tested and are displayed on the projection board 2.

It should be noted that, in the utility model, the preferred lamp panel 4 is an LED lamp panel, i.e. a plurality of LED lamp beads are arranged in a rectangular array, when the LED lamp beads emit light, the lamp panel 4 emits a parallel-like light beam to act on the circuit board 11 to be tested, and the parallel light beam passes through the through holes on the circuit board 11 to be tested and is displayed on the projection board 2, and a corresponding through hole layout diagram is arranged on the projection board 2 in advance, when the light beams on all the through holes are projected on the through hole positions on the through hole layout diagram, the through holes on the circuit board are indicated to be not missing, otherwise, the through holes on the circuit board are indicated to be missing;

the lamp panel 4 of the utility model can also be provided with an infrared sensor, namely, the infrared transmitters are arranged on the lamp panel 4 in a matrix manner, the infrared receivers are arranged on the projection board 2 in a matrix manner, and when the infrared receivers do not receive infrared light of the infrared transmitters, the situation that no through holes exist in the infrared receivers is indicated, so that whether the through holes on the circuit board are missing can be rapidly detected by utilizing the infrared sensor.

On the basis of the structure, in order to facilitate the installation of the projection plate 2 and the lamp plate 4, the test fixture further comprises a base 1 and a top seat 3, the projection plate 2 is fixedly arranged at the top of the base 1, the lamp plate 4 is fixedly arranged at the bottom of the top seat 3, the base 1 is used for the installation of the projection plate 2, the top seat 3 is used for the installation of the lamp plate 4, and it is worth to say that the base 1 and the top seat 3 are parallel to each other.

On the basis of the structure, at least two stand columns 5 are fixed between the base 1 and the top seat 3, supporting structures for supporting the circuit board 11 to be tested are arranged on the stand columns 5, preferably 4 stand columns 5 are arranged and distributed at four corners of the base 1, and the four corners of the circuit board 11 to be tested can be supported.

On the basis of the structure, the supporting structure comprises supporting pieces arranged on the upright posts 5, the supporting pieces are provided with supporting parts for placing the circuit boards 11 to be tested, the supporting pieces are provided with sliding sleeves 6, the sliding sleeves 6 are arranged on the upright posts 5 in a sliding sleeved mode, the supporting parts are provided with supporting cylinders 9, the supporting cylinders 9 are fixedly arranged on the outer side walls of the sliding sleeves 6, supporting rods 7 for placing the circuit boards 11 to be tested are horizontally and movably inserted in the supporting cylinders 9, the positions of the supporting rods 7 can be adjusted, the contact area between the supporting rods 7 and the circuit boards 11 to be tested can be adjusted, and the fact that the supporting rods 7 overlong influence on detection of through holes is avoided.

Further, the locking bolt 8 is connected to the sliding sleeve 6 in a threaded mode, the threaded end of the locking bolt 8 abuts against the outer wall of the upright post 5, the locking bolt 8 is a plum blossom locking bolt, when the sliding sleeve is used, the locking bolt 8 is screwed down, the sliding sleeve 6 can be fixed, and the sliding sleeve 6 can be adjusted and fixed conveniently.

Further, the sliding sleeve 6 is provided with a sliding hole, a rubber bushing 601 is fixed on the inner wall of the sliding hole, the upright post 5 is arranged in the rubber bushing 601 in a sliding manner, the friction force between the rubber bushing 601 and the upright post 5 can be increased, and even if a locking piece is not arranged, when the sliding sleeve 6 is placed on the upright post 5, the position of the sliding sleeve 6 can be kept still within a certain stress range.

Further, the supporting cylinder 9 is provided with an adjusting hole 901, the supporting rod 7 is arranged in the adjusting hole 901 in a sliding mode, the supporting rod 7 horizontally slides in the adjusting hole 901, the supporting rod 7 is not required to be locked and fixed, the supporting rod 7 can be directly pulled to realize the position adjustment of the supporting rod 7, of course, the supporting cylinder 9 can be provided with a locking bolt, and the stability of the supporting rod 7 can be further improved.

On the basis of the structure, after the sliding sleeve 6 is adjusted, in order to ensure that each sliding sleeve 6 is positioned on the same horizontal plane, a scale 10 which is vertically arranged is arranged on each upright post 5, so that the sliding sleeve 6 can adjust the same height, and further the height adjustment of a plurality of sliding sleeves 6 is realized.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims

1. A test fixture for circuit board through-hole, its characterized in that: the projection board and the lamp panel are arranged at intervals and in parallel;

2. The test fixture for a circuit board through hole of claim 1, wherein: the test fixture further comprises a base and a top seat, the projection plate is fixedly arranged at the top of the base, and the lamp panel is fixedly arranged at the bottom of the top seat;

3. The test fixture for a circuit board through hole of claim 2, wherein: the supporting structure comprises supporting pieces arranged on the upright posts, and the supporting pieces are provided with supporting parts for placing circuit boards to be tested.

4. The test fixture for a circuit board through hole of claim 3, wherein: the support piece selects the sliding sleeve, the sliding sleeve slip cap is located on the stand.

5. The test fixture for a circuit board through hole of claim 4, wherein: the sliding sleeve is provided with a sliding hole, a rubber bushing is fixed on the inner wall of the sliding hole, and the upright post is arranged in the rubber bushing in a sliding manner.

6. The test fixture for a circuit board through hole of claim 5, wherein: the sliding sleeve is connected with a locking bolt in a threaded mode, and the threaded end of the locking bolt abuts against the outer wall of the upright post.

7. The test fixture for a circuit board through hole according to any one of claims 4-6, wherein: the supporting part is a supporting cylinder, the supporting cylinder is fixedly arranged on the outer side wall of the sliding sleeve, and a supporting rod for placing a circuit board to be tested is horizontally and movably inserted in the supporting cylinder.

8. The test fixture for a circuit board through hole according to any one of claims 3 to 7, wherein: and each upright post is provided with a graduated scale which is vertically arranged.