CN113038706A

CN113038706A - Guide device for blind insertion of double-layer circuit board connector and circuit board

Info

Publication number: CN113038706A
Application number: CN202110234687.5A
Authority: CN
Inventors: 余世茂
Original assignee: Shandong Yingxin Computer Technology Co Ltd
Current assignee: Shandong Yingxin Computer Technology Co Ltd
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2021-06-25
Anticipated expiration: 2041-03-03
Also published as: CN113038706B

Abstract

The invention discloses a guide device for blind plugging of a double-layer circuit board connector and a circuit board. The device comprises: the first sleeve penetrates through the first circuit board and is fixedly connected with the first circuit board; the stud longitudinally penetrates through the first sleeve and is provided with a stud cap at one end far away from the second circuit board; the spring is arranged on the stud and clamped between the stud cap and the first circuit board, and one end, close to the first circuit board, of the spring is located in the first sleeve; the second sleeve is in sliding sleeve joint with one end of the first sleeve, which is close to the second circuit board, so as to shield or expose the end part of the stud; and the nut is fixed on the second circuit board and is used for being matched with the stud, and the outer diameter of the nut is smaller than the inner diameter of the second sleeve. The scheme of the invention can effectively reduce the risk of circuit board collision, reduce the product development cost, improve the stability of the connector between the circuit boards, accelerate the product development period and have better universality.

Description

Guide device for blind insertion of double-layer circuit board connector and circuit board

Technical Field

The invention belongs to the technical field of electronics, and particularly relates to a guide device for blind plugging of a double-layer circuit board connector and a circuit board.

Background

With the improvement of the performance requirements of the server and the diversity of the requirements of customers, the design limitation of the server is larger and larger, the available space is smaller and smaller, and the layout space of the device is denser and denser. Therefore, the operation and maintenance difficulty of parts such as component modules and the like is increased frequently, and the potential damage risk of collision is increased continuously. Especially, in a scenario where dual-layer or multi-layer Printed Circuit Board (PCB) cards are inserted back to back, a problem of blind insertion between PCB boards often occurs due to space and the like.

Conventional solutions in the industry have focused on modifying custom interconnect connectors (e.g., adding alignment guide features to the connector) or adding guide pins (pins) to the interconnect PCB. However, most of the existing solutions belong to the situation of later-stage optimization, frequently, the problems that the matching degree of a connector manufacturer is poor, the layout space of a PCB needs to be adjusted in a large range and the like occur, the marketing progress of the whole product can be directly influenced, and the research and development cost of the product is improved.

Disclosure of Invention

In view of the above, it is desirable to provide a guiding device and a circuit board for blind mating of a dual-layer circuit board connector.

According to a first aspect of the present invention, there is provided a guide for blind mating of a two-layer circuit board connector, the guide comprising:

the first sleeve penetrates through the first circuit board and is fixedly connected with the first circuit board;

the stud longitudinally penetrates through the first sleeve and is provided with a stud cap at one end far away from the second circuit board;

the spring is sleeved on the stud and clamped between the stud cap and the first circuit board;

the second sleeve is in sliding sleeve connection with one end, close to the second circuit board, of the first sleeve so as to shield or expose the end part of the stud;

the nut is fixed on the second circuit board and used for being matched with the stud, and the outer diameter of the nut is smaller than the inner diameter of the second sleeve.

In one embodiment, the device further comprises a third sleeve;

the third sleeve is sleeved on the stud, the third sleeve is held between the stud cap and the first circuit board, and one end, far away from the second circuit board, of the first sleeve is located inside the third sleeve.

In one embodiment, one end of the stud, which is far away from the second circuit board, is a smooth cylinder, and one end of the stud, which is close to the second circuit board, is provided with a thread.

In one embodiment, the outer wall of the middle part of the first sleeve is provided with an annular first limiting table;

a through hole is formed in the first circuit board in a penetrating mode, and the diameter of the first limiting table is larger than that of the through hole.

In one embodiment, a diameter of an end of the first sleeve distal from the second circuit board is larger than a diameter of an end of the first sleeve proximal to the second circuit board.

In one embodiment, an annular second limiting table is arranged in the middle of the inner wall of the middle of the first sleeve, tapping threads matched with the threads of the stud are arranged on the edge of the second limiting table, and one end, located in the first sleeve, of the spring abuts against the second limiting table.

In one embodiment, the end part of the first sleeve, which is close to the second circuit board, is provided with an annular third limiting table;

the diameter of an opening at one end, close to the first circuit board, of the second sleeve is smaller than that of the third limiting table, and the diameter of an opening at one end, close to the second circuit board, of the second sleeve is larger than that of the third limiting table.

In one embodiment, the first sleeve is made of metal, and the second sleeve is made of plastic.

In one embodiment, the connector further comprises a male connector head arranged on one side of the first circuit board close to the second circuit board, and a female connector head arranged on the second circuit board and matched with the male connector head, wherein the maximum distance from the distal end of the second sleeve to the first circuit board is greater than the length of the male connector head extending out of the first circuit board.

According to a second aspect of the invention, there is also provided a circuit board employing at least one of the above-described devices.

The utility model provides a guider for double-deck circuit board connector blind plugging, through fixed setting run through the first sleeve of thickness direction on first electroplax, stretch into the double-screw bolt from first telescopic one end and stretch out from the other end, the one end that the second circuit board was kept away from to the double-screw bolt is provided with the screw cap, still with the spring centre gripping between screw cap and first circuit board, and the one end that is close to the second circuit board at first sleeve slides and cup joints the second sleeve, cooperate through first sleeve and second sleeve and provide the direction for the nut connection on double-screw bolt and the second circuit board, can effectively reduce the risk that the circuit board collided the piece damage, reduce product development cost, the stability of the connector between the improvement circuit board, accelerate the cycle of product development, the commonality that has the preferred.

In addition, the invention also provides a circuit board, which can also realize the technical effects and is not described again.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art 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 that other embodiments can be obtained by using the drawings without creative efforts.

Fig. 1 is a schematic view of a blind-mate application scenario of a guiding apparatus for blind-mating of a dual-layer circuit board connector according to an embodiment of the present invention;

fig. 2 is a schematic bottom structure diagram of a first circuit board according to another embodiment of the invention;

fig. 3A is a front view of a guiding device for blind mating of a dual-layer circuit board connector according to another embodiment of the present invention;

FIG. 3B is a cross-sectional view taken along B-B of FIG. 3A;

FIG. 3C is a partial, pictorial illustration of the area IV of FIG. 3B;

FIG. 4A is a schematic view of the assembled state of a part of the structure of the device according to another embodiment of the present invention;

fig. 4B is an exploded view of fig. 4A.

[ description of reference ]

1: a first sleeve; 11: a first limit table; 12: a second limit table; 13: a third limiting table;

2, a stud; 21: a stud cap; 22: a cylinder;

3: a spring;

4: a second sleeve;

5: a nut;

6: a first circuit board;

7: a second circuit board:

8: a third sleeve;

91: a connector male; 92: a connector female.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.

In one embodiment, as shown in fig. 1, fig. 2 and fig. 3A-fig. 3C, the present invention provides a guiding apparatus for blind mating of a two-layer circuit board connector, the guiding apparatus comprising:

the first sleeve 1 penetrates through the first circuit board 6 in the thickness direction and is fixedly connected with the first circuit board 6;

the stud 2 extends into one end of the first sleeve 1 and extends out of the other end of the first sleeve, and a stud cap 21 is arranged at one end, far away from the second circuit board 7, of the stud 2;

the spring 3 is sleeved on the stud 2 and clamped between the stud cap 21 and the first circuit board 6, for example, one end of the spring 3 close to the first circuit board 6 can be positioned inside the first sleeve 1;

the second sleeve 4 is in sliding sleeve connection with one end, close to the second circuit board 7, of the first sleeve 1, and the stud 2 does not extend out of the second sleeve 4 when the second sleeve 4 slides to the end of the first sleeve 1;

the nut 5 is fixed on the second circuit board 7, the outer diameter of the nut 5 is smaller than the inner diameter of the second sleeve 4, and one end, far away from the first sleeve 1, of the second sleeve 4 is sleeved on the periphery of the nut 5.

In yet another embodiment, shown in conjunction with fig. 4A and 4B, the device further comprises a third sleeve 8;

the third sleeve 8 is sleeved on the stud 2, the third sleeve 8 is clamped between a stud cap 21 of the stud 2 and the first circuit board 6, and one end, far away from the second circuit board 7, of the first sleeve 1 is located inside the third sleeve 8.

In another embodiment, referring to fig. 4B again, the stud cap 21 extends to one side to form a cylinder 22, an end of the stud 2 away from the second circuit board 7 is a smooth cylinder, and an end of the stud 2 close to the second circuit board 7 is threaded. For example, the portion of the column 22 left on the first circuit board 6 is a smooth column, the lower half of the column 22 is provided with an external thread, and the nut 5 is provided with an internal thread.

In another embodiment, please refer to fig. 3C and 4B, an annular first position-limiting table 11 is disposed on an outer wall of the middle portion of the first sleeve 1;

a through hole is formed in the first circuit board 6 in a penetrating mode, and the diameter of the first limiting table 11 is larger than that of the through hole. Preferably, the through hole on the first circuit board can be a Pad hole exposed with copper on the existing circuit board or the Pad hole is slightly enlarged.

In another embodiment, referring to fig. 4B, a diameter of an end of the first sleeve 1 away from the second circuit board 7 is larger than a diameter of an end of the first sleeve 1 close to the second circuit board 7.

In another embodiment, please refer to fig. 3C again, an annular second limiting table 12 is disposed in the middle of the inner wall of the middle of the first sleeve 1, a thread matched with the screw thread of the stud 2 is disposed at the edge of the second limiting table 12, and one end of the spring located in the first sleeve abuts against the second limiting table.

In another embodiment, referring to fig. 3C and fig. 4B again, an annular third limiting table 13 is disposed at an end of the first sleeve 1 close to the second circuit board 7;

the diameter of an opening of the second sleeve 4 close to the first circuit board 6 is smaller than that of the third limiting table 13, and the diameter of an opening of the second sleeve 4 close to the second circuit board 7 is larger than that of the third limiting table 13.

For example, as shown in fig. 4B, the lower portion of the first sleeve 1 is a cylindrical structure, a sunken ring structure and a protruding ring slightly protruding from the ring portion are disposed outside the cylinder, the sunken ring mainly provides a moving area for the lower second sleeve 4, the diameter of the protruding ring is a structure with an inverted C-angle, and the diameter of the protruding ring is slightly smaller than the inner diameter of the small opening of the lower second sleeve, the large C-angle at this position can facilitate the installation of the second sleeve, and the slightly smaller diameter of the ring protrusion can ensure that the second sleeve is not easy to fall off and slip out after being fixedly installed in the sleeve.

Preferably, the first sleeve 1 is made of metal, and the second sleeve 4 is made of plastic. When the first sleeve is made of metal, the first sleeve and the first circuit board can be fixed in a welding mode, and the welding mode is convenient to assemble and disassemble; in addition, the second sleeve is the direct overall arrangement with the contact of second circuit board, adopts the material to contain the device on the circuit board more easily to the dismouting is comparatively convenient, and extrusion deformation through appropriate dynamics can realize with the block of the spacing platform of third.

Preferably, the device further comprises a male connector 91 arranged on one side of the first circuit board 6 close to the second circuit board 7, and a female connector 92 arranged on the second circuit board 7 and matched with the male connector 91, wherein the maximum distance from the distal end of the second sleeve 4 to the first circuit board 6 is greater than the length of the male connector 91 extending out of the first circuit board 6, that is, when the second sleeve 4 slides to the end of the first sleeve 1 close to the second circuit board 7, the distance from one end of the second sleeve 4 close to the second circuit board 7 to the first circuit board 6 is greater than the length of the male connector 91 extending out of the first circuit board 6.

In another embodiment, referring again to fig. 1, fig. 3 and fig. 4B, the following detailed description will be made on the principle of the fixing and the specific implementation of the guiding of the device, if the first circuit board is a small PCB card, the second circuit board is a main board of a server,

when the connector is installed, the first sleeve 1 is welded on the PCB small card 1, and attention is paid to the same side of the PCB small card as the male connector 91 of the stud 2; combining the stud 2, the spring 3 and the third sleeve 8 according to the mode of fig. 4B, and screwing the stud cap 21 at the top into the welded first sleeve; and then the second sleeve 4 is pushed and welded at the end part of the first sleeve 1 of the PCB small card and clamped between the third limit table 13 and the PCB small card, so that the second sleeve 4 can freely slide between the bottom of the PCB small card and the bottom of the PCB small card.

Further, the assembled PCB card is placed over the motherboard, slightly aligning the connector positions. Then the PCB small card is directly put down from top to bottom, and at the moment, the second sleeve 4 on the PCB small card slides to the far end far away from the bottom of the PCB small card due to the self gravity. In the descending process of the PCB small card, the second sleeve 4 can preferentially contact the nut 5 welded on the main board, and because the second sleeve 4 is of a hollow structure and the inner diameter of the second sleeve 4 is larger than the outer diameter of the nut 5 on the main board, the nut 5 on the main board can be sleeved on the second sleeve 4 along with the descending of the PCB small card, and at the moment, the stud bolt is retained in the second sleeve 4 due to the supporting effect of the spring 3 on the stud bolt and cannot touch the main board and devices on the main board; when the second sleeve contacts the main board, the PCB small card can always move along the axial direction of the nut 5 on the main board in the subsequent descending process. After the bottom of the second sleeve is pushed against the nut 5 on the main board, the second sleeve still has the degree of freedom along the axial direction, so that the subsequent continuous descending process of the PCB small card cannot be influenced, the PCB small card can be ensured not to move, and the hot-melt screw can be locked and fixed along the axial direction through a screwdriver until the threaded part (such as the hot-melt screw) of the stud on the PCB small card is pushed against the nut on the main board. Then the rest parts are fastened by screws.

When the PCB small card and the main board are detached and replaced, firstly, common screws are sequentially loosened, then a screw bolt on the PCB small card is loosened by a screwdriver, the whole PCB small card is lifted up until the second sleeve 4 on the PCB small card leaves a nut on the main board, and at the moment, the PCB small card and the main board can be separately placed at one position.

Preferably, the stud 2 on the PCB small card is mainly divided into two parts, namely the upper part and the lower part of the PCB small card, the part above the PCB small card is of a cylindrical structure, a platform with two inverted large C-shaped corners is arranged inside the cylinder, tapping is arranged at the edge of the platform, and the main purpose is that the cylinder 22 can be screwed inside the first sleeve 1 through the tapping, so that the stud 2 cannot fall off or be lost. In addition, the inverted C-shaped platform inside the first sleeve 1 can provide support for the spring 3, so that the moving range of the inner spring can be limited. Specifically, the stud 2 can rebound under the action of the elastic force of the spring after being loosened, and manual operation action is omitted.

The device can effectively reduce the risk of damaging the collision piece on the PCB, reduce the product development cost, improve the stability of the connector between the PCBs, accelerate the product development period, accelerate the step of marketing the product and improve the research and development speed of a new product of a company. In addition, it should be noted that the device is not limited to the blind-mating range with the double-layer or multi-layer PCB in the server industry, and may also be in other scenarios where double circuit boards are mated with each other.

According to another aspect of the invention, a circuit board is also provided, wherein the circuit board adopts at least one device.

For example, the double-layer circuit board is usually fixed at four corners of the circuit board in order to ensure that the fixing effect is stable when the double-layer circuit board is fixed, for example, the multiple groups of screws and nuts are used for fixing at four corners of a small PCB card, the device can be used for replacing two groups of screws and nuts on one group of diagonals of the small PCB card, if the layout space on the small PCB card is large enough, all the screws and the screws can be replaced, the mode is fixed more stably, and the possibility of device collision during blind plugging of the connector of the double-layer circuit board is greatly reduced.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A guide assembly for blind mating of a two-layer circuit board connector, said assembly comprising:

2. The device of claim 1, further comprising a third sleeve;

3. The apparatus of claim 1, wherein an end of the stud remote from the second circuit board is a smooth cylinder, and an end of the stud near the second circuit board is threaded.

4. The device of claim 1, wherein the outer wall of the middle part of the first sleeve is provided with an annular first limit stop;

5. The apparatus of claim 4, wherein a diameter of an end of the first sleeve distal from the second circuit board is larger than a diameter of an end of the first sleeve proximal to the second circuit board.

6. The device as claimed in claim 4, wherein the middle part of the inner wall of the middle part of the first sleeve is provided with an annular second limit table, the edge of the second limit table is provided with a tapping matched with the thread of the stud, and one end of the spring, which is positioned in the first sleeve, abuts against the second limit table.

7. The apparatus of claim 4, wherein the end of the first sleeve near the second circuit board is provided with an annular third stop;

8. The apparatus of claim 1, wherein the first sleeve is a metal and the second sleeve is a plastic.

9. The apparatus of claim 1, further comprising a male connector disposed on a side of the first circuit board adjacent to the second circuit board, and a female connector disposed on the second circuit board and mated with the male connector, wherein a maximum distance from a distal end of the second sleeve to the first circuit board is greater than a length of the male connector extending out of the first circuit board.

10. A circuit board, characterized in that it employs at least one device according to any one of claims 1-9.