CN211122928U

CN211122928U - Carrier and test fixture

Info

Publication number: CN211122928U
Application number: CN201921057873.0U
Authority: CN
Inventors: 黄亮; 黄龙; 邵勇锋; 汪兴友; 高玲; 周强
Original assignee: Shenzhen Ioranges Automation Co ltd; Huawei Technologies Co Ltd
Current assignee: Shenzhen Ioranges Automation Co ltd; Huawei Technologies Co Ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-07-28
Anticipated expiration: 2029-07-08

Abstract

The utility model relates to the field of testing, and discloses a carrier and a testing jig, wherein the carrier comprises a mounting plate and a gland, a PCB assembly is positioned between the mounting plate and the gland, a clamping device is arranged on the mounting plate, and the gland is tightly pressed on the mounting plate by the clamping device; the test fixture comprises a carrier and a base, wherein the base comprises a turnover mechanism, and the turnover mechanism can drive the carrier to turn over for at least 180 degrees. Through fixing PCB or PCBA with the mode that compresses tightly, still can realize reliably fixedly to PCB or PCBA that does not have the flange, then can realize the flying probe test to this type of PCB or PCBA that does not have the flange.

Description

Carrier and test fixture

Technical Field

The utility model relates to a test field especially relates to a carrier and test fixture.

Background

With the continuous miniaturization, lightness and thinness of various electronic products, the requirement on the integration level of various PCBAs is higher and higher. Detection of PCBA failures is increasingly difficult and flying probe tests are in force. The flying probe test is a process for detecting a PCB or PCBA entering a corresponding station by adopting a movable test probe, a flying probe tester on the market fixes and positions the edge of the PCB or PCBA entering the test station, and then the test probe contacts the surface of the PCB or PCBA for testing, but the positioning and fixing of the flying probe tester must depend on the edge of the board, so that the PCB or PCBA without the edge of the board cannot be tested. In some industries, especially 3C industries, each year in the production process and after-sales maintenance of the PCBA, there will be about several million "bad boards", these bad boards have no board edge, the flying probe tester cannot be applied to the detection and maintenance of these PCBA without board edge, therefore, a carrier and a corresponding test fixture capable of bearing the PCBA without board edge are needed, and the problem that the existing test device cannot detect the PCB or the PCBA without board edge can be solved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a carrier and test fixture, the problem that current testing arrangement can not detect no flange PCB or PCBA has been solved.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a carrier, includes mounting panel and gland, the gland can compress tightly PCB subassembly on the mounting panel, the gland with the mounting panel all is equipped with the through-hole that supplies the test probe to pass, be equipped with clamping device on the mounting panel, clamping device includes clamping state and unblock state, clamping device is located during clamping state, clamping device moves towards the mounting panel direction compresses tightly the gland.

As a further improvement of the above technical solution, the mounting plate further includes a plurality of positioning pins, and the positioning pins are matched with the positioning holes of the gland to realize the positioning of the gland relative to the mounting plate.

As a further improvement of the above technical solution, a mounting groove is provided on the mounting plate, the mounting groove can accommodate the PCB assembly, the mounting groove includes a plurality of positioning surfaces, the PCB assembly abuts against the positioning surfaces, and the positioning surfaces restrict the PCB assembly to move along the plane of the mounting plate.

As a further improvement of the technical scheme, the bottom of the positioning pin is a flange type linear bearing, and the side surface of the flange type linear bearing is the positioning surface.

As a further improvement of the above technical solution, a surface of one side of the mounting plate close to the gland is a plane, the mounting plate is provided with a plurality of stoppers, and the stoppers abut against the PCB assembly and limit the PCB assembly to move along the surface of the mounting plate.

The testing jig comprises the carrier and a base, wherein the base comprises a turnover mechanism, and the turnover mechanism can drive the carrier to turn over for at least 180 degrees.

As a further improvement of the above technical solution, the turnover mechanism is detachably connected to the carrier through an intermediate member, and the turnover mechanism drives the intermediate member to move, thereby driving the carrier to move.

As a further improvement of the technical scheme, the turnover mechanism comprises a turnover shaft, the intermediate piece comprises a positioning block, one end of the positioning block is fixed on the turnover shaft, and the other end of the positioning block is clamped with the carrier.

As a further improvement of the technical scheme, one side of the positioning block, which is close to the mounting plate, is of a groove structure, the mounting plate is clamped in the groove structure, and the positioning block abuts against the mounting plate and is detachably connected with the mounting plate.

As a further improvement of the technical scheme, the bottom of the base is provided with an avoiding hole, and the carrier can partially penetrate through the avoiding hole when rotating.

The utility model has the advantages that: through fixing PCB or PCBA with the mode that compresses tightly, still can realize reliably fixedly to PCB or PCBA that does not have the flange, then can realize the flying probe test to this type of PCB or PCBA that does not have the flange.

Drawings

The present invention will be further explained with reference to the drawings and examples.

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

fig. 2 is a schematic structural diagram of a test fixture according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating the turning of the test fixture according to an embodiment of the present invention;

fig. 4 is a schematic diagram of the test fixture after turning in one embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which function is to supplement the description of the text part of the specification with figures, so that each technical feature and the whole technical solution of the present invention can be understood visually and vividly, but it cannot be understood as a limitation to the scope of the present invention.

In the description of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. When a feature is referred to as being "disposed," "secured," or "connected" to another feature, it can be directly disposed, secured, or connected to the other feature or be indirectly disposed, secured, or connected to the other feature.

In the description of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "more than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.

In addition, unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The utility model provides an embodiment both can be used for testing PCB, can test PCBA again, and the PCB subassembly can refer to the corresponding subassembly of PCB (bare board) here, can refer to the corresponding subassembly of PCBA (finished product board) again.

Referring to fig. 1, which illustrates the structural schematic diagram of the carrier in an embodiment of the present invention, carrier 1 is used to fix the PCB to be tested, carrier 1 is composed of a gland 11 and a mounting plate 12, the central position of mounting plate 12 is provided with a mounting groove corresponding to gland 11, that is, gland 11 compresses the PCB assembly to be tested at the central position of mounting plate 12 (i.e., mounting groove position), PCB 15 is located between gland 11 and mounting plate 12, substrate 16 is actually a Torlon plate, substrate 16 is located between PCB assembly 15 and mounting plate 12, substrate 16 is matched with the shape of PCB 15, substrate 16 has a plurality of microneedles on the surface, the microneedle corresponds to the contact with the stitch of the PCB to be tested, the central positions of gland 11 and mounting plate 12 are all hollowed out, so that the probe is not blocked when contacting the PCB plate from the outside.

In order to fix the gland 11, a quick clamp 13 is arranged on one side, close to the gland, of the mounting plate 12, the quick clamp 13 is a quick clamp, the quick clamp 13 is overlapped with a projection part of the gland 11 on the mounting plate 12, when the gland is not stressed, the gland 11 is pressed on the mounting plate 12 through the quick clamp 13, when the gland is stressed, the quick clamp 13 is separated from the gland 11, and the gland 11 can freely leave the mounting plate 12.

In addition to fixation, the gland 11 needs to be positioned on the mounting plate 12, a column hole is used for positioning, a positioning pin 14 is arranged on one side, close to the gland, of the mounting plate 12, the positioning pin 14 corresponds to a positioning hole 17 in the gland 11 to achieve positioning of the gland 11 on the mounting plate 12, the bottom of the positioning pin 14 is a flange-type linear bearing, a first inclined surface 151 of the PCB 15 is abutted by the side surface of the flange-type linear bearing, a second inclined surface 152 of the PCB 15 is abutted by the side surface of the flange-type linear bearing, and similarly, a third inclined surface and a fourth inclined surface are also abutted by the side surfaces of the corresponding flange-type linear bearing respectively, so that limiting of the PCB 15 in all directions in the horizontal direction of the mounting plate is achieved, the base 16 and the PCB 15 are identical in shape, and the base 16 is pressed on the mounting plate 12 by the PCB 15. In other words, the side of the flange type linear bearing is also a part of the mounting groove, and in other embodiments of the present invention, it is feasible to rely only on the side of the flange type linear bearing as the limit of the PCB board without the mounting groove.

Because here adopt the fixed PCB board of mode or PCBA of pressfitting, not fix to the flange limit of PBC board, consequently the embodiment of the utility model provides a test fixture can deal with the condition that does not have the flange limit, has improved test fixture's range of application.

In addition, for convenience of illustration, the positioning block 21 is also shown in the figure, one side of the positioning block 21 close to the mounting plate 12 is a groove structure, when the positioning block 21 is connected with the mounting plate 12, the mounting plate 21 is clamped in the groove of the positioning block 21, that is, the positioning block 21 is positioned relative to the mounting plate 12 by the groove structure, and the positioning block 21 and the mounting plate 12 are connected through the mounting hole 212. The connection hole 211 is connected to the base of the test fixture, and will be described later.

Referring to fig. 2, showing the structure diagram of the testing fixture in an embodiment of the present invention, the testing fixture includes a carrier 1 and a base 2, the base 2 includes a turnover mechanism 22, a turnover shaft 221 of the turnover mechanism 22 is installed in a connection hole 211 (shown in fig. 1) of a positioning block 21, the positioning block 21 is used as an intermediate piece, the fixation and separation of the turnover mechanism 22 and the carrier 1 are realized, the positioning block 21 uniformly transmits the force applied by the turnover shaft 221, and the service life of the carrier 1 is prolonged.

After pressing tightly gland 11 at quick clamp 13, the probe is tested the PCB subassembly from test fixture's top downwards, and in actual engineering, what test here is the top layer of PCB subassembly, for test bottom layer, here overturns whole carrier 1 through tilting mechanism, need not to dismantle back adjustment direction to the PCB subassembly that awaits measuring.

Referring to fig. 3 and 4, fig. 3 shows a schematic diagram of an embodiment of the present invention illustrating a turning of the test fixture, and fig. 4 shows a schematic diagram of an embodiment of the present invention illustrating a post-turning of the test fixture. Fig. 2-4 show the process of changing the test fixture from the first state in fig. 2 to the second state in fig. 4, in order to leave enough space for the carrier 1 to turn over, the bottom of the base 2 is dug, and the whole set of test fixtures occupies a small space.

While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications and substitutions without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims

1. The utility model provides a carrier, its characterized in that, includes mounting panel and gland, the gland can compress tightly PCB subassembly on the mounting panel, the gland with the mounting panel all is equipped with the through-hole that supplies the test probe to pass, be equipped with clamping device on the mounting panel, clamping device includes clamping state and unblock state, clamping device is located during the clamping state, clamping device orientation the mounting panel direction compresses tightly the gland.

2. The carrier according to claim 1, further comprising a plurality of positioning pins on the mounting plate, wherein the positioning pins cooperate with the positioning holes of the gland to position the gland relative to the mounting plate.

3. The carrier according to claim 2, wherein the mounting plate is provided with a mounting groove, the mounting groove can accommodate the PCB assembly, the mounting groove includes a plurality of positioning surfaces, the PCB assembly abuts against the positioning surfaces, and the positioning surfaces restrict the movement of the PCB assembly along the plane of the mounting plate.

4. The carrier according to claim 3, wherein the bottom of the positioning pin is a flange-type linear bearing, and a side surface of the flange-type linear bearing is the positioning surface.

5. The carrier according to claim 2, wherein a surface of the mounting plate near the gland is a plane, and a plurality of stoppers are disposed on the mounting plate, and the stoppers abut against the PCB assembly and limit the movement of the PCB assembly along the surface of the mounting plate.

6. A test fixture, comprising the carrier of any one of claims 1-5, and further comprising a base, wherein the base comprises a turnover mechanism, and the turnover mechanism can turn the carrier over at least 180 °.

7. The testing fixture of claim 6, wherein the turnover mechanism is detachably connected to the carrier via an intermediate member, and the turnover mechanism drives the intermediate member to move, so as to drive the carrier to move.

8. The test fixture of claim 7, wherein the turnover mechanism comprises a turnover shaft, the intermediate member comprises a positioning block, one end of the positioning block fixes the turnover shaft, and the other end of the positioning block is clamped with the carrier.

9. The testing fixture of claim 8, wherein a side of the positioning block, which is close to the mounting plate, is a groove structure, the mounting plate is clamped in the groove structure, and the positioning block abuts against the mounting plate and is detachably connected with the mounting plate.

10. The test fixture of claim 6, wherein the base has an avoiding hole at a bottom thereof, and the carrier can partially pass through the avoiding hole when rotating.