CN219840902U

CN219840902U - Split fool-proof pin

Info

Publication number: CN219840902U
Application number: CN202320961961.3U
Authority: CN
Inventors: 李文锐; 彭镜辉; 向参军
Original assignee: Guangzhou Guanghe Technology Co Ltd
Current assignee: Guangzhou Guanghe Technology Co Ltd
Priority date: 2023-04-25
Filing date: 2023-04-25
Publication date: 2023-10-17
Anticipated expiration: 2033-04-25

Abstract

The utility model relates to the technical field of PCB processing, and particularly discloses a split fool-proof pin, wherein in the split fool-proof pin, the outer diameter size of a first positioning part is smaller than the inner diameter size of a fool-proof hole, and the first positioning part is positioned in the fool-proof hole; the lid includes second location portion, and second location portion is equipped with the grafting groove, and second location portion is arranged in preventing slow-witted hole, and first location portion fastening fit is in the grafting groove, and the external diameter size of second location portion equals the internal diameter size in preventing slow-witted hole. This split type prevents slow-witted pin has add the lid through on the basis of original pin body, peg graft second location portion in preventing slow-witted hole, and will be located the first location portion fastening fit in the spliced eye in preventing slow-witted hole to pack the clearance between first location portion and the slow-witted hole, make PCB pass through lid and pin body and bottom plate relatively fixed, and then guaranteed the precision of drilling, reduced PCB rejection rate.

Description

Split fool-proof pin

Technical Field

The utility model relates to the technical field of PCB processing, in particular to a split fool-proof pin.

Background

The pin positioning belongs to part matching, the part matching generally has interference fit, clearance fit and tight fit, and clearance fit and tight fit can be selected for general drilling. After the lamination of the multilayer circuit board is completed, fool-proof holes are formed to improve the efficiency of mounting the multilayer circuit board on a processing platform.

However, because a large gap is formed between the split fool-proof pin and the side wall of the fool-proof hole of the multilayer circuit board, the gap is easy to cause position deviation during drilling, so that the situation of deviation of the drilling position occurs, and finally, the rejection rate of the multilayer circuit board is high.

Therefore, research on a split fool-proof pin is needed to solve the problem that the gap between the split fool-proof pin and the side wall of the fool-proof hole causes drilling deviation, thereby causing high rejection rate of the multi-layer circuit board.

Disclosure of Invention

The utility model aims to provide a split foolproof pin, which aims to solve the problem that a gap between the split foolproof pin and the side wall of a foolproof hole causes drilling deviation, so that the rejection rate of a multi-layer circuit board is high.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a split fool-proof pin, which is used for positioning in the process of installing a PCB on a bottom plate, and comprises the following components:

the pin body comprises a fixing part and a first positioning part, wherein the fixing part is tightly matched in a mounting hole of a bottom plate, the outer diameter size of the first positioning part is smaller than the inner diameter size of a fool-proof hole of the PCB, and the first positioning part is positioned in the fool-proof hole;

the cover body comprises a second positioning part, wherein the second positioning part is provided with an inserting groove, the second positioning part is positioned in the fool-proof hole, the first positioning part is in fastening fit with the inserting groove, and the outer diameter size of the second positioning part is equal to the inner diameter size of the fool-proof hole.

As an optional technical scheme of split type fool-proof pin, the lid includes the cap body, the cap body is located the second location portion is kept away from the one end of pin body.

As an alternative technical scheme of the split fool-proof pin, the outer diameter of the cap body is larger than that of the second positioning part.

As an alternative technical scheme of the split fool-proof pin, the cap body is pressed on the PCB in a state that the first positioning part is tightly matched in the inserting groove.

As an alternative technical scheme of the split fool-proof pin, the outer circumferential surface of the cap body is provided with anti-skid patterns.

As an alternative technical scheme of the split fool-proof pin, the anti-skid stripes comprise at least one of transverse stripes, vertical stripes and diagonal stripes.

As an alternative technical scheme of the split fool-proof pin, the cap body and the second positioning part are integrally formed.

As an alternative technical scheme of split type fool-proof pin, a plurality of first bar grooves are uniformly distributed on the outer peripheral surface of the second positioning part, and the extending direction of the first bar grooves is parallel to the axis of the fool-proof hole.

As an alternative technical scheme of split fool-proof pin, the second positioning part is provided with an exhaust hole penetrating through the inserting groove.

As an optional technical scheme of split type fool-proof pin, a plurality of bar-shaped channels are uniformly distributed on the second positioning part, and the extending direction of the bar-shaped channels is parallel to the axis of the fool-proof hole and penetrates through to the inserting groove.

The beneficial effects of the utility model are as follows:

the utility model provides a split fool-proof pin, which is characterized in that a cover body is additionally arranged on the basis of an original pin body, a plug-in groove is formed in a second positioning part of the cover body, the outer diameter size of the second positioning part is equal to the inner diameter size of a fool-proof hole, when the split fool-proof pin is used, the second positioning part is plugged in the fool-proof hole, and a first positioning part positioned in the fool-proof hole is tightly matched in the plug-in hole, so that a gap between the first positioning part and the fool-proof hole is filled, a PCB is relatively fixed with a bottom plate through the cover body and the pin body, the drilling precision is further ensured, and the rejection rate of the PCB is reduced.

Drawings

Fig. 1 is an assembly schematic diagram of a split fool-proof pin, PCB and chassis in an embodiment of the present utility model;

FIG. 2 is a schematic view showing a bottom view of a cover according to an embodiment of the present utility model, including a first bar-shaped groove and a second bar-shaped groove;

FIG. 3 is a schematic diagram of a front view of a cover according to an embodiment of the present utility model;

fig. 4 is a schematic bottom view of a cover according to an embodiment of the present utility model, including a strip-shaped channel.

In the figure:

100. a pin body; 110. a fixing part; 120. a first positioning portion;

200. a cover body; 210. a second positioning portion; 211. a plug-in groove; 212. a first bar-shaped groove; 213. an exhaust hole; 214. a second bar-shaped groove; 215. a strip-shaped channel; 220. a cap body; 221. anti-skid lines;

300. a PCB; 310. fool-proof holes;

400. a bottom plate.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, 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 above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1 to 3, the present embodiment provides a split fool-proof pin for positioning during the process of mounting a PCB300 on a base plate 400, the split fool-proof pin including a pin body 100 and a cover 200, wherein the pin body 100 includes a fixing portion 110 and a first positioning portion 120, the fixing portion 110 is tightly fitted in a mounting hole of the base plate 400, an outer diameter size of the first positioning portion 120 is smaller than an inner diameter size of a fool-proof hole 310 of the PCB300, and the first positioning portion 120 is located in the fool-proof hole 310; the cover 200 includes a second positioning portion 210, the second positioning portion 210 is provided with a plugging slot 211, the second positioning portion 210 is located in the fool-proof hole 310, the first positioning portion 120 is tightly matched in the plugging slot 211, and the outer diameter of the second positioning portion 210 is equal to the inner diameter of the fool-proof hole 310.

This split type fool-proof pin has set up lid 200 through on original pin body 100's basis, lid 200's second location portion 210 is equipped with the grafting groove 211, and the external diameter size of second location portion 210 equals with fool-proof hole 310's internal diameter size, during the use, peg graft second location portion 210 in fool-proof hole 310, and will be located the first location portion 120 fastening fit in the grafting hole in fool-proof hole 310, thereby pack the clearance between first location portion 120 and fool-proof hole 310, make PCB300 pass through lid 200 and pin body 100 and bottom plate 400 relatively fixed, and then guaranteed drilling's precision, the PCB300 rejection rate has been reduced.

After drilling, the cover 200 is first pulled out of the fool-proof hole 310, so that the cover 200 is pulled out of the fool-proof hole 310, and in this embodiment, the cover 200 includes a cap 220, and the cap 220 is located at one end of the second positioning portion 210 away from the pin body 100.

In the prior art, the pin is tightly matched with the fool-proof hole 310, and both sides of the PCB300 are directly buckled to be disassembled upwards after the drilling is completed, at this time, the PCB300 is slightly bent and clamped to cause the pin to be pulled out from the bottom plate 400, the pin needs to be reseed, the drilling precision of the first part is reconfirmed, and the time and the labor are wasted, and the drilling quality of the PCB300 is unstable. In this embodiment, the cover 200 is first pulled out, so that a gap is formed between the fool-proof hole 310 and the first positioning portion 120, so as to avoid clamping and pulling out the pin body 100.

In this embodiment, the outer diameter of the cap 220 is larger than the outer diameter of the second positioning portion 210. Further, the cap 220 is a solid structure.

In order to improve the fixing effect on the PCB300, in the present embodiment, the cap 220 is ballasted on the PCB300 in a state that the first positioning portion 120 is tightly fitted in the insertion groove 211. That is, in a state where the first positioning portion 120 is tightly fitted in the insertion groove 211, the cap 220 is ballasted to a surface of the PCB300 remote from the bottom plate 400. The above arrangement enables the PCB300 to be ballasted on the base plate 400. The bottom plate 400 is a table of the drilling machine.

The outer circumferential surface of the cap 220 is provided with anti-slip patterns 221. The provision of the anti-slip pattern 221 helps to improve the friction between the tool and the cap 220, saving grip. In other embodiments, a hanging hole may be disposed on the cap 220, the hanging hole penetrates through the entire cap 220, and the extending direction of the hanging hole is perpendicular to the extending direction of the second positioning portion 210. The hanging hole may be provided by hooking both ends of the hanging hole, thereby withdrawing the cover 200 from the fool-proof hole 310.

In this embodiment, the cap 220 and the second positioning portion 210 are integrally formed. The process is simple and the cost is low.

The anti-slip pattern 221 includes at least one of a cross pattern, a vertical pattern, and a diagonal pattern. Specifically, in the first embodiment of the present embodiment, the anti-skid thread 221 includes a transverse thread, the transverse thread is in a ring structure, and is wound on the cap 220, and the axis of the transverse thread is parallel to the axis of the fool-proof hole 310. In the second implementation manner of this embodiment, the anti-slip patterns 221 include a plurality of vertical patterns, where the plurality of vertical patterns are uniformly distributed in the circumferential direction of the cap 220, and the axes of the vertical patterns and the foolproof holes 310 are parallel. In the third embodiment of the present embodiment, the anti-skid threads 221 include transverse threads and vertical threads, the transverse threads are in a ring structure and are wound on the upper portion of the cap 220, and the axes of the transverse threads are parallel to the axis of the fool-proof hole 310; the number of the vertical lines is plural, the vertical lines are uniformly distributed at the lower part of the circumference of the cap body 220, and the axes of the vertical lines and the fool-proof holes 310 are parallel. Wherein, the lower portion of the cap 220 is located between the upper portion of the cap 220 and the second positioning portion 210. In the fourth embodiment of the present embodiment, the anti-slip patterns 221 include a plurality of diagonal patterns, the plurality of diagonal patterns are uniformly distributed in the circumferential direction of the cap 220, and the axes of the anti-fool holes 310 are parallel.

In the fourth implementation manner of this embodiment, the anti-skid patterns 211 include at least two of transverse patterns, vertical patterns and diagonal patterns, and are in a grid shape.

The outer peripheral surface of the second positioning portion 210 is uniformly provided with a plurality of first bar-shaped grooves 212, and the extending direction of the first bar-shaped grooves 212 is parallel to the axis of the fool-proof hole 310 on the PCB300. On the one hand, the arrangement of the first strip-shaped groove 212 reduces the contact area between the second positioning part 210 and the side wall of the fool-proof hole 310, reduces the friction force and is convenient to disassemble and assemble; on the other hand, the material consumption is reduced, and the cost is saved.

The second positioning portion 210 is provided with an exhaust hole 213 penetrating to the insertion groove 211. The exhaust hole 213 is provided to facilitate exhausting the gas in the insertion groove 211, so as to avoid the influence of the air pressure compression on the assembly effect when the first positioning portion 120 is matched with the insertion groove 211.

In other embodiments, a plurality of second grooves 214 are uniformly distributed on the side wall surface of the plugging slot 211, and the extending direction of the second grooves 214 is parallel to the axis of the fool-proof hole 310 on the PCB300. The arrangement of the second strip-shaped groove 214 reduces the contact area of the first positioning part 120 and the side wall of the inserting groove 211, reduces friction force and is convenient to assemble and disassemble; on the other hand, the material consumption is reduced, and the cost is saved.

Wherein the first slot 212 and the second slot 214 are disposed directly opposite. The first and second grooves 212 and 214 are provided in plural and facing each other. In this embodiment, the vent hole 213 may not be provided.

In other embodiments, as shown in fig. 4, the second positioning portion 210 is uniformly provided with a plurality of strip-shaped channels 215, and the extending direction of the strip-shaped channels 215 is parallel to the axis of the fool-proof hole 310 on the PCB300 and penetrates into the inserting slot 211. The arrangement of the strip-shaped channel 215 enables the second positioning portion 210 to be divided into a plurality of inserting structures, so that the material consumption of the cover body 200 is further reduced, and the cost is lowered.

The length dimension of the first positioning portion 120 is smaller than the length dimension of the fool-proof hole 310. The length of the insertion slot 211 is smaller than the length of the fool-proof hole 310. The first positioning portion 120 has a solid structure, and the first positioning portion 120 of the solid structure does not deform when clamped by pliers, which is beneficial to prolonging the service life.

In this embodiment, a chamfer is disposed at an end of the first positioning portion 120 away from the fixing portion 110. In an embodiment, the second positioning portion 210 has a chamfer on the inner sidewall of the opening of the insertion slot 211. In an embodiment, a chamfer is disposed on the outer periphery of the second positioning portion 210 at the opening of the insertion slot 211. In an embodiment, the second positioning portion 210 has a chamfer on the inner sidewall of the opening of the plugging slot 211, and the outer periphery of the second positioning portion 210 has a chamfer on the opening of the plugging slot 211.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. A split fool-proof pin for positioning during installation of a PCB (300) to a chassis (400), comprising:

the pin body (100), the pin body (100) comprises a fixing part (110) and a first positioning part (120), the fixing part (110) is tightly matched in a mounting hole of a bottom plate (400), the outer diameter size of the first positioning part (120) is smaller than the inner diameter size of a fool-proof hole (310) of the PCB (300), and the first positioning part (120) is positioned in the fool-proof hole (310);

the cover body (200), the cover body (200) includes second location portion (210), second location portion (210) are equipped with jack-in groove (211), second location portion (210) are located prevent slow-witted hole (310), first location portion (120) secure fit in jack-in groove (211), the external diameter size of second location portion (210) equals prevent the internal diameter size in slow-witted hole (310).

2. The split fool-proof pin according to claim 1, wherein the cover body (200) comprises a cap body (220), the cap body (220) being located at an end of the second positioning portion (210) remote from the pin body (100).

3. The split fool-proof pin according to claim 2, wherein an outer diameter dimension of the cap (220) is larger than an outer diameter dimension of the second positioning portion (210).

4. The split fool-proof pin according to claim 3, wherein the cap (220) is pressed against the PCB (300) in a state that the first positioning portion (120) is tightly fitted in the insertion groove (211).

5. The split fool-proof pin according to claim 2, wherein the outer circumferential surface of the cap body (220) is provided with a skid-proof pattern (221).

6. The split fool-proof pin of claim 5, wherein the anti-slip pattern (221) comprises at least one of a cross pattern, a vertical pattern, and a diagonal pattern.

7. The split fool-proof pin according to claim 2, wherein the cap (220) and the second positioning portion (210) are integrally formed.

8. The split fool-proof pin according to any one of claims 1 to 7, wherein a plurality of first strip-shaped grooves (212) are uniformly distributed on the outer peripheral surface of the second positioning portion (210), and the extending direction of the first strip-shaped grooves (212) is parallel to the axis of the fool-proof hole (310).

9. The split fool-proof pin according to any one of claims 1-7, wherein the second positioning part (210) is provided with a vent hole (213) penetrating to the insertion groove (211).

10. The split fool-proof pin according to any one of claims 1-7, wherein the second positioning portion (210) is uniformly provided with a plurality of strip-shaped channels (215), and the extending direction of the strip-shaped channels (215) is parallel to the axis of the fool-proof hole (310) and penetrates into the inserting slot (211).