CN213023450U - Single-reference PCB function test positioning structure and device - Google Patents

Abstract

The utility model discloses a single benchmark PCB functional test location structure and device, include: a pressing plate module, a carrier plate module, a middle frame plate module and a needle plate module; the lower end of the pressing plate module is provided with at least one pressing plate guide post; the middle frame plate module further comprises a single-datum guide post; the single reference guide posts are distributed at the corners of the middle frame plate and correspond to the pressure plate guide posts one by one; through holes are formed in the corners of the support plate and correspond to the single reference guide posts one by one; the lower part of the single-reference guide column penetrates through the middle frame plate, a through hole is correspondingly formed in the needle plate module, and a positioning structure is formed between the through hole and the lower part of the single-reference guide column; the utility model discloses the advantage lies in that three big modules of support plate module, faller module, clamp plate module have single benchmark location, form tolerance chain closed loop, improve probe positioning accuracy.

Description

Single-reference PCB function test positioning structure and device

Technical Field

The utility model relates to a PCB board testing arrangement technical field especially relates to a single benchmark PCB functional test location structure and device.

Background

With the rapid development of electronic product technology and the increasing requirements for process efficiency and yield, the electronic industry gradually starts to enhance the development and optimization of product function test equipment while improving the process efficiency of electronic products. Among them, the requirement for the function test of the mainboard of the electronic product is the most urgent. At present, the application of the clamp structure is wider, but the following defects are always existed:

1. the traditional test fixture adopts multilayer reference positioning, the tolerance levels among modules are multiple, and the risk of accumulated tolerance exists.

2. Traditional test fixture faller module adopts fixed structure, forms rigid power conduction between faller module and the center plate, and the clamp plate module pushes down the in-process and can cause impulse vibrations in the twinkling of an eye, influences probe contact stability, and increase probe damage risk, and the faller module makes center region production increase deformation under the clamp plate module pushes down the pressure effect, still influences test stability.

Chinese patent CN206281949U discloses an ICT needle bed test jig, the on-line screen storage device comprises a base, be fixed with the mount pad on the base, the mount pad is fixed with the support plate through the elastic support post, still be provided with the probe on the mount pad, this probe is located between support plate and the mount pad, the test box is still installed through the backup pad to the base, install drive arrangement on the test box, this drive arrangement's below is fixed with the mounting panel, the mounting panel is located the support plate directly over, be fixed with a plurality of pressure heads in the below of mounting panel, when drive arrangement sinks, the pressure head contacts with the PCB board that awaits measuring, the probe contacts with the stitch of the PCB board that awaits measuring. Above-mentioned technical scheme has alleviated the probe impact through the damping spring structure, but does not solve the condition that the tolerance is accumulative together.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a single benchmark PCB functional test location structure and device can solve above-mentioned problem.

For this purpose, the utility model is implemented by the following technical scheme.

A single reference PCB functional test location structure, includes: a pressing plate module, a carrier plate module, a middle frame plate module and a needle plate module;

the lower surface of the middle frame module is provided with the needle plate module, and the upper surface of the middle frame module is provided with the support plate module; the pressing plate module is positioned above the carrier plate module;

the pressing plate module further comprises a flip pressing plate, a floating pressing plate, a pressing plate guide column and a pressing block; the lower part of the flip pressing plate is connected with the floating pressing plate in a floating mode, and at least one pressing plate guide post is installed at the corner of the lower surface of the floating pressing plate; the pressing block is arranged in the center of the lower surface of the floating pressing plate;

the lower part of the carrier plate module is connected with the middle frame plate module in a floating way;

the middle frame plate module further comprises a single-reference guide column and a middle frame plate; the single reference guide posts are distributed at the corners of the middle frame plate and correspond to the pressure plate guide posts one by one; the upper end of the single-reference guide post is provided with a positioning groove, and the positioning groove and the lower part of the pressure plate guide post form an inserting positioning structure; the carrier plate module also comprises a carrier plate; through holes are formed in the corners of the support plate and correspond to the single reference guide posts one by one; the lower part of the single-reference guide column penetrates through the middle frame plate, a through hole is correspondingly formed in the needle plate module, and a positioning structure is formed between the through hole and the lower part of the single-reference guide column

The pin plate module also comprises a pin plate floating plate, a signal conversion plate and a functional test plate; the needle plate floating plate comprises at least one layer of needle plate, the signal conversion plate is arranged below the needle plate floating plate, and the functional test plate is arranged below the signal conversion plate; the probe is arranged on the needle plate, the needle head of the probe faces upwards and is used for connecting a PCB contact, and the needle tail faces downwards and is used for connecting the signal adapter plate; the needle plate floating plate is connected with the middle frame plate module in a floating mode.

Furthermore, the floating connection structure of the flip pressing plate and the floating pressing plate comprises a pressing plate spring, a pressing plate and a high screw; each corner of the floating pressing plate is provided with a through hole, and the equal-height screws of the pressing plate penetrate through the through holes from bottom to top and are vertically arranged on the lower surface of the flip pressing plate; the pressing plate spring is sleeved on the pressing plate equal-height screw; the upper end of the pressing plate spring is in contact with the lower surface of the flip pressing plate, and the lower end of the pressing plate spring is in contact with the upper surface of the floating pressing plate.

Furthermore, the diameter of the through hole at the corner of the floating pressure plate is larger than the shaft diameter of the pressure plate equal-height screw, and the through hole and the shaft shoulder of the pressure plate equal-height screw form clearance fit.

Furthermore, the floating connection structure of the carrier plate module and the middle frame plate module comprises a carrier plate spring, a carrier plate and a high screw; each corner of the carrier plate is provided with a through hole, and screws with the same height of the carrier plate penetrate through the through holes from top to bottom and are vertically arranged on the upper surface of the middle frame plate; the support plate spring is sleeved on the support plate equal-height screw; the upper end of the support plate spring is in contact with the lower surface of the support plate, and the lower end of the support plate spring is in contact with the upper surface of the middle frame plate.

Furthermore, the diameter of the through hole at the edge of the carrier plate is larger than the shaft diameter of the carrier plate equal-height screw, and the through hole and the shaft shoulder of the carrier plate equal-height screw form clearance fit.

Furthermore, the floating connection structure of the needle plate floating plate and the middle frame plate module comprises a floating stop block, a floating guide column, a floating spring and a mounting seat; the mounting seat is of an inward concave structure, the upper end of the mounting seat is fixedly connected with the floating stop block, an open cuboid cavity is formed in the middle of the mounting seat, the floating guide columns are mounted in the cavity along the vertical direction, and the floating springs are mounted in parallel; the upper end surface of the floating stop block is fixedly connected with the corner of the lower surface of the middle frame plate; the needle plate floating plate is characterized in that a through hole is formed in the corner of the needle plate floating plate and sleeved on the floating guide post, and the upper end of the floating spring is in contact with the lower surface of the needle plate floating plate.

Furthermore, the diameter of the through hole at the corner of the floating plate of the needle plate is larger than the shaft diameter of the floating guide post, and the through hole and the floating guide post form clearance fit.

Furthermore, the needle plate floating plate is formed by compounding a plurality of layers of needle plates, and the needle plates are sequentially a first layer of needle plate, a second layer of needle plate, a third layer of needle plate, a fourth layer of needle plate and a fifth layer of needle plate from top to bottom, wherein the third layer of needle plate is used as an installation base of other needle plates.

On the other hand, the utility model also provides a PCB testing device which is composed of the positioning structure, and also comprises a driving module and a bottom plate; the driving module is arranged on the upper surface of the bottom plate and also comprises a horizontal driving module and a vertical driving module; the movable end of the vertical driving module is connected with the pressing plate module; the movable end of the horizontal driving module is connected with the middle frame module.

The utility model has the advantages of as follows:

1. the three big modules of support plate module, faller module, clamp plate module have single benchmark location, and single benchmark guide post is fixed a position with the guide hole of support plate module and faller module simultaneously, and clamp plate module guide pillar and the guide hole location of single benchmark guide post make support plate module, faller module, clamp plate module three all become tolerance chain closed loop for single benchmark guide post, reduce the tolerance accumulation that the tolerance level was many to be introduced between the module, improve probe positioning accuracy.

2. The floating structure of the needle plate module enables elastic force transmission to be formed between the needle plate module and the middle frame plate, the needle plate module is stressed and only the middle frame plate is transmitted through the needle plate floating module, instant impulse vibration generated by rigid force transmission is avoided, the contact stability of the probe is improved, and the damage risk of the probe is reduced; meanwhile, the central area of the middle frame plate is prevented from sinking and deforming.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only one or several embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive efforts.

The distribution positions and distribution numbers of the same structures shown in the drawings are only for convenience of describing the invention, but do not indicate or imply that the structures referred to must have a specific orientation, distribution number and therefore should not be construed as limiting the invention.

Fig. 1 is an exploded view of the positioning structure of the present invention;

FIG. 2 is an exploded view of the platen module;

FIG. 3 is an exploded view of a carrier module;

FIG. 4 is an exploded view of the middle frame module;

FIG. 5 is an exploded view of the needle plate module;

FIG. 6 is an exploded view of a floating attachment structure;

FIG. 7 is a schematic view of single datum positioning;

FIG. 8 is a perspective view of the PCB testing device of the present invention;

fig. 9 is an exploded view of a PCB testing apparatus.

In the figure:

1-a platen module; 2-PCB; 3-a carrier module; 4-middle frame plate module; 5-a needle plate module; 6-floating connection structure; 7-a flip press plate; 8-platen spring; 9-floating pressing plate; 10-platen guide posts; 11-pressing plate equal height screw; 12-briquetting; 13-carrier plate equal-height screws; 14-a carrier plate; 15-carrier plate springs; 16-single reference guide post; 17-a middle frame plate; 18-a first layer of needle boards; 19-a second layer of needle boards; 20-a probe; 21-a needle plate floating plate; 22-a third layer of needle boards; 23-a fourth layer of needle boards; 24-a fifth layer of needle boards; 25-a signal conversion board; 26-a functional test board; 27-a floating stop block; 28-floating guide post; 29-a floating spring; 30-a mounting seat; 31-an electronic control module; 32-a horizontal driving module; 33-a vertical driving module; 34-bottom plate.

Detailed Description

In the description of the present invention, it is to be understood that the terms "upper end", "lower end", "upper portion", "lower portion", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings.

It should also be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

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

A single-reference PCB functional test positioning structure is shown in combination with FIG. 1, and mainly comprises: a pressing plate module 1, a carrier plate module 3, a middle frame plate module 4 and a needle plate module 5.

As shown in fig. 2, the pressing plate module 1 further includes a floating pressing plate 9, a pressing plate guide post 10, and a pressing block 12; a floating pressure plate 9 is connected below the flip pressure plate 7 in a floating way, and 4 pressure plate guide posts 10 are arranged at the corners of the lower surface of the floating pressure plate 9; a pressing block 12 is arranged at the center of the lower surface of the floating pressing plate 9; preferably, the floating connection structure of the flip cover pressing plate 7 and the floating pressing plate 9 comprises a pressing plate spring 8, a pressing plate contour screw 11; each corner of the floating pressing plate 9 is provided with a through hole, and a pressing plate equal-height screw 11 penetrates through the through holes from bottom to top and is vertically arranged on the lower surface of the flip pressing plate 7; the pressure plate spring 8 is sleeved on the pressure plate equal-height screw 11; the upper end of the pressure plate spring 8 is contacted with the lower surface of the flip pressure plate 7, and the lower end is contacted with the upper surface of the floating pressure plate 9. The diameter of the through hole at the corner of the floating pressure plate 9 is larger than the shaft diameter of the pressure plate equal-height screw 11, and the through hole and the shaft shoulder of the pressure plate equal-height screw 11 form clearance fit.

As shown in fig. 4, the middle frame plate module 4 further includes single reference guide posts 16 and a middle frame plate 17; the single reference guide posts 16 are distributed at the corners of the middle frame plate 17 and correspond to the press plate guide posts 10 one by one; the upper end of the single reference guide post 16 is provided with a positioning groove, and the positioning groove and the lower part of the pressing plate guide post 10 form an inserting positioning structure.

The lower part of the carrier plate module 3 is connected with the middle frame plate module 4 in a floating way. As shown in fig. 3, the carrier module 3 further includes a carrier 14; the carrier plate 14 is provided with through holes at the corners, which correspond to the single reference guide posts 16 one-to-one. Preferably, the floating connection structure of the carrier module 3 and the middle frame module 4 comprises a carrier spring 15, a carrier contour screw 13; each corner of the carrier plate 14 is provided with a through hole, and a carrier plate equal-height screw 13 penetrates through the through holes from top to bottom and is vertically arranged on the upper surface of the middle frame plate 17; the carrier plate spring 15 is sleeved on the carrier plate equal-height screw 13; the carrier springs 15 have upper ends contacting the lower surface of the carrier 14 and lower ends contacting the upper surface of the middle frame 17. The diameter of the through hole at the corner of the carrier plate 14 is larger than the shaft diameter of the carrier plate equal-height screw 13, and the through hole and the shaft shoulder of the carrier plate equal-height screw 13 form clearance fit.

Preferably, the lower part of the single reference guide column 16 passes through the middle frame plate 17, and the needle plate module 5 is correspondingly provided with a through hole and forms a positioning structure with the lower part of the single reference guide column 16.

As shown in fig. 5, the pin plate module 5 further includes a pin plate floating plate 21, a signal transfer plate 25, and a function test plate 26. Preferably, the needle plate floating plate 21 is composed of a plurality of layers of needle plates in a composite manner, and comprises a first layer of needle plate 18, a second layer of needle plate 19, a third layer of needle plate 22, a fourth layer of needle plate 23 and a fifth layer of needle plate 24 from top to bottom in sequence, wherein the third layer of needle plate 22 is used as an installation base of other needle plates. A signal conversion plate 25 is arranged below the needle plate floating plate 21, and a functional test plate 26 is arranged below the signal conversion plate 25; the needle plate is provided with a probe 20, the needle head of the probe faces upwards and is used for connecting a PCB contact, and the needle tail faces downwards and is used for connecting a signal adapter plate 25; the needle plate floating plate 21 is connected with the middle frame plate module 4 in a floating way.

Preferably, as shown in fig. 5 and 6, the floating connection structure 6 of the needle plate floating plate 21 and the middle frame plate module 4 comprises a floating stop block 27, a floating guide column 28, a floating spring 29 and a mounting seat 30; the mounting seat 30 is of a concave structure, the upper end of the mounting seat is fixedly connected with the floating stop block 27, an open cuboid cavity is formed in the middle of the mounting seat, a floating guide post 28 is installed in the cavity along the vertical direction, and floating springs 29 are installed in parallel; the upper end surface of the floating stop block 27 is fixedly connected with the lower surface corner of the middle frame plate 17; the corner of the needle plate floating plate 21 is provided with a through hole which is sleeved on the floating guide post 28, and the upper end of the floating spring 29 contacts the lower surface of the needle plate floating plate 21. The diameter of the through hole at the corner of the needle plate floating plate 21 is larger than the shaft diameter of the floating guide post 28, and the through hole and the floating guide post 28 form clearance fit.

Principle of positioning

As shown in fig. 7, the flip cover pressing plate 7 moves downward, so as to push the floating pressing plate 9 and the upper pressing block 12 thereof to contact the PCB2 downward and press the same to contact the probes 20 on the needle plate module 5, so as to conduct the PCB2, the signal conversion plate 25 and the function testing plate 26 for testing; the single reference guide column 16 passes through the through hole of the carrier plate 14 upwards and is inserted into the pressing plate guide column 10 to complete upper positioning, and the lower part of the single reference guide column 16 sequentially passes through the through holes of the middle frame plate 17 and the needle plate floating plate 21 to complete lower positioning.

On the other hand, the utility model also provides a PCB testing device composed of the positioning structure in the embodiment, which also comprises a driving module arranged on the upper surface of the bottom plate 34, and the driving module also comprises a horizontal driving module 32 and a vertical driving module 33; preferably, as shown in fig. 8 and 9, the power unit of the driving module is a cylinder; the vertical driving module 33 has two cylinders 35, which are respectively vertically installed on two sides of the bottom plate 34; the horizontal driving module 32 has two cylinders 35, which are horizontally mounted on the inner side of the vertical driving module 33 and are connected to the middle frame module 4 through the bracket 38; the two side ends of the flip cover pressing plate 7 are fixed with a sliding block 37, the sliding block is connected across the two parallel sliding rails 3, and the sliding rails 3 are vertically arranged on the bottom plate 34. The movable end of the cylinder 35 of the vertical driving module 33 is connected with the slide block 37 and drives the pressing plate module 1 to move vertically. The movable end of the horizontal driving module 32 is connected with the middle frame module 4, the lower surface of the middle frame module 4 is provided with the needle plate module 5, and the upper surface of the middle frame module 4 is provided with the carrier plate module 3; the pressing plate module 1 is located above the carrier plate module 3. Preferably, the electronic control module 31 is further mounted on the bottom plate 34, and the electronic control module 31 is respectively connected with all the cylinders of the driving module.

The above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims (8)

1. The utility model provides a single benchmark PCB functional test location structure which characterized in that includes: a pressing plate module (1), a carrier plate module (3), a middle frame plate module (4) and a needle plate module (5);

the needle plate module (5) is mounted on the lower surface of the middle frame plate module (4), and the carrier plate module (3) is mounted on the upper surface of the middle frame plate module (4); the pressing plate module (1) is positioned above the carrier plate module (3);

the pressing plate module (1) further comprises a flip pressing plate (7), a floating pressing plate (9), a pressing plate guide column (10) and a pressing block (12); the lower part of the flip pressing plate (7) is connected with the floating pressing plate (9) in a floating mode, and at least one pressing plate guide column (10) is installed at the corner of the lower surface of the floating pressing plate (9); the pressing block (12) is arranged at the center of the lower surface of the floating pressing plate (9);

the lower part of the carrier plate module (3) is connected with the middle frame plate module (4) in a floating way;

the middle frame plate module (4) further comprises a single-reference guide column (16) and a middle frame plate (17); the single-datum guide posts (16) are distributed at the corners of the middle frame plate (17) and correspond to the pressure plate guide posts (10) one by one; the upper end of the single-datum guide post (16) is provided with a positioning groove, and the positioning groove and the lower part of the pressure plate guide post (10) form an inserting positioning structure; the carrier plate module (3) further comprises a carrier plate (14); through holes are formed in the corners of the carrier plate (14), and the through holes correspond to the single-reference guide posts (16) one by one; the lower part of the single-reference guide column (16) penetrates through the middle frame plate (17), a through hole is correspondingly formed in the needle plate module (5), and a positioning structure is formed between the through hole and the lower part of the single-reference guide column (16);

the pin plate module (5) further comprises a pin plate floating plate (21), a signal conversion plate (25) and a function test plate (26); the signal conversion plate (25) is arranged below the needle plate floating plate (21), and the function test plate (26) is arranged below the signal conversion plate (25); the needle plate floating plate (21) is connected with the middle frame plate module (4) in a floating mode.

2. The positioning structure according to claim 1, wherein the floating connection structure of the flip pressing plate (7) and the floating pressing plate (9) comprises a pressing plate spring (8), a pressing plate contour screw (11); each corner of the floating pressing plate (9) is provided with a through hole, and a pressing plate equal-height screw (11) penetrates through the through holes from bottom to top and is vertically arranged on the lower surface of the flip pressing plate (7); the pressing plate spring (8) is sleeved on the pressing plate equal-height screw (11); the upper end of the pressure plate spring (8) is in contact with the lower surface of the flip pressure plate (7), and the lower end of the pressure plate spring is in contact with the upper surface of the floating pressure plate (9).

3. The positioning structure according to claim 2, wherein the diameter of the through hole at the corner of the floating pressure plate (9) is larger than the shaft diameter of the pressure plate equal-height screw (11), and the through hole and the shaft shoulder of the pressure plate equal-height screw (11) form clearance fit.

4. The positioning structure of claim 1, wherein the floating connection structure of the carrier plate module (3) and the middle frame plate module (4) comprises a carrier plate spring (15), a carrier plate contour screw (13); each corner of the carrier plate (14) is provided with a through hole, and a carrier plate equal-height screw (13) penetrates through the through holes from top to bottom and is vertically arranged on the upper surface of the middle frame plate (17); the support plate spring (15) is sleeved on the support plate equal-height screw (13); the upper end of the carrier plate spring (15) is in contact with the lower surface of the carrier plate (14), and the lower end of the carrier plate spring is in contact with the upper surface of the middle frame plate (17).

5. The positioning structure according to claim 4, wherein the diameter of the through hole at the corner of the carrier plate (14) is larger than the shaft diameter of the carrier plate contour screw (13), and the through hole is in clearance fit with the shaft shoulder of the carrier plate contour screw (13).

6. The positioning structure according to claim 1, characterized in that the floating connection structure (6) of the needle board floating board (21) and the middle frame board module (4) comprises a floating stop block (27), a floating guide column (28), a floating spring (29) and a mounting seat (30); the mounting seat (30) is of a concave structure, the upper end of the mounting seat is fixedly connected with the floating stop block (27), an open cuboid cavity is formed in the middle of the mounting seat, the floating guide columns (28) are installed in the cavity along the vertical direction, and the floating springs (29) are installed in parallel; the upper end surface of the floating stop block (27) is fixedly connected with the corner of the lower surface of the middle frame plate (17); the needle plate floating plate is characterized in that a through hole is formed in the corner of the needle plate floating plate (21), the through hole is sleeved on the floating guide column (28), and the upper end of the floating spring (29) is in contact with the lower surface of the needle plate floating plate (21).

7. The arrangement as claimed in claim 6, characterized in that the diameter of the through-hole at the corner of the needle board floating plate (21) is larger than the axial diameter of the floating guide post (28), and the through-hole forms a clearance fit with the floating guide post (28).

8. The PCB function test device formed by the positioning structure according to any one of claims 1 to 7, further comprising a driving module, a bottom plate (34); the driving module is arranged on the upper surface of the bottom plate (34) and further comprises a horizontal driving module (32) and a vertical driving module (33); the movable end of the vertical driving module (33) is connected with the pressing plate module (1); the movable end of the horizontal driving module is connected with the middle frame plate module (4).

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