CN113382537B

CN113382537B - Circuit board fixing structure

Info

Publication number: CN113382537B
Application number: CN202010163140.6A
Authority: CN
Inventors: 傅永滕
Original assignee: Inventec Pudong Technology Corp; Inventec Corp
Current assignee: Inventec Pudong Technology Corp; Inventec Corp
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2022-10-25
Anticipated expiration: 2040-03-10
Also published as: CN113382537A

Abstract

The invention provides a circuit board fixing structure which comprises a first fixing piece and a circuit board. The first fixing piece comprises a column, a first flange and a second flange; the first flange is connected to a side of the cylinder, and the second flange is connected to a side of the cylinder and spaced apart from the first flange. The height of the second flange relative to the side of the column is greater than the height of the first flange relative to the side of the column. The circuit board is fixedly arranged on the surface of the first flange far away from the second flange and forms a surface adhesion structure with the first fixing piece.

Description

Circuit board fixing structure

Technical Field

The invention relates to the technical field of circuit boards, in particular to a circuit board fixing structure.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

A circuit board is usually fixed by a circuit board fixing member (standoff) having a screw hole by directly disposing the circuit board fixing member having the screw hole on the upper surface of the circuit board to facilitate further combination with other circuit boards or boards, or a housing member using the screw hole. Still other fastening methods use non-threaded fasteners, such as rivets (spools), for example, and the "I" portion of a "E" fastener, such as a "E" fastener, is used to fasten the circuit board, while the protruding "E" head portion is then combined with the metal housing by means of press-riveting. When fixing adjacent circuit boards, one of the circuit boards is usually provided with a gourd hole for facilitating the disassembly of the circuit board, and the portion provided with the gourd hole is substantially unable to be provided with a circuit or place a part. Therefore, the fixing manner inevitably reduces the routing space of the circuit board.

Disclosure of Invention

With the recent technological progress, high system integration, multiplexing, and high-speed signal requirements, the circuit layout density has increased, and the layout space of the circuit board circuits and components has a great influence on the signal quality and the product cost.

In view of the above, an objective of the present invention is to provide a circuit board that can reduce the space occupied by the fixing structure on the circuit board and has more flexible installation requirements, thereby further improving the space utilization of the circuit board, so that the positions of the circuit traces and the components can have more flexibility to meet the layout requirements of the circuits and the components.

The main purpose of the invention is to arrange a first fixing piece on a circuit board in a surface bonding mode for supporting the circuit board and having a second flange which is large enough to be combined with a second fixing piece so as to provide a friction force which is large enough to fix the circuit board; and the outer diameter of the first flange of the first fixing part is smaller than that of the second flange, so that the circuit layout space on the circuit board is more, or the circuit layout is reduced to surround the avoided path, and the high-speed signal is greatly facilitated.

Some embodiments of the present invention provide a circuit board fixing structure, including a first fixing member and a circuit board. The first fixing piece comprises a cylinder, a first flange and a second flange; the first flange is connected to the side of the cylinder and the second flange is connected to the side of the cylinder and spaced apart from the first flange. The height of the second flange relative to the side of the column is greater than the height of the first flange relative to the side of the column. The circuit board is fixedly arranged on the surface of the first flange far away from the second flange and forms a surface adhesion structure with the first fixing piece.

In one or more embodiments of the present invention, the second fixing member is partially sandwiched between the first flange and the second flange.

In one or more embodiments of the present invention, the second fixing member is a housing.

In one or more embodiments of the present invention, the housing has a through hole, a portion of the column between the first flange and the second flange passes through the through hole, and the first flange and the second flange abut against two opposite surfaces of the housing, respectively.

In one or more embodiments of the invention, the housing has a through-hole through which the portion of the column between the first flange and the second flange pass, the housing comprising a connected base portion and a recessed portion, the through-hole extending at least to the recessed portion, the second flange being located within the recessed portion.

In one or more embodiments of the present invention, one end of the pillar penetrates through the circuit board and is coplanar with a surface of the circuit board facing away from the housing, and the first flange is interposed between the one end and the second flange.

In one or more embodiments of the present invention, the second fixing member is a slot member, the slot member has a slot portion, and a portion between the first flange and the second flange is clamped to an upper edge of the slot portion of the slot member.

In one or more embodiments of the present invention, the second fixing member is a slot element, the slot element has a groove portion, and a portion of the second flange is clamped to the groove portion.

In one or more embodiments of the invention, the side surface of the post includes a stop surface that is planar.

In one or more embodiments of the present invention, the outer edge of the second flange has directivity.

The above embodiments of the present invention at least reduce the area of the opening required by the circuit board and increase the space for routing or component arrangement on the circuit board by fixing the circuit board on the surface of the first flange away from the second flange.

In order to make the technical features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic cross-sectional view of a circuit board fixing structure according to an embodiment of the present invention;

fig. 2A is a schematic view illustrating a circuit board directly fixed on a first fixing member according to an embodiment of the present invention;

fig. 2B is a perspective view of a circuit board fixing structure according to an embodiment of the present invention;

fig. 2C is a schematic perspective view of a circuit board fixing structure according to an embodiment of the present invention;

FIG. 3A is a schematic side view of a first fixing element according to an embodiment of the present invention;

fig. 3B is a schematic perspective view of a first fixing element according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of another first fixing element according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of another first fixing element according to an embodiment of the present invention;

fig. 6A is a schematic view of a side of the concave portion of the housing facing away from the circuit board according to the embodiment of the invention;

FIG. 6B is a schematic view of a step of mounting the first fixture to the housing from the perspective of FIG. 6A;

FIG. 6C is a schematic view of another step of mounting the first mount to the housing from the perspective of FIG. 6A;

FIG. 6D is a schematic view of a further step of mounting the first attachment member to the housing from the perspective of FIG. 6A;

fig. 7A is a schematic perspective view of a card slot device according to an embodiment of the invention;

fig. 7B is a schematic perspective view illustrating the first fixing element and the slot element being clamped together according to an embodiment of the present invention;

wherein the reference numbers are as follows:

100-a circuit board fixing structure; 110. 110A, 110B-a first fixture; 112-a column; 1122-side; 1122S-stop face; 1124-one end; 1129-moiety; 114-a first flange; 1142-surface; 116. 116' -a second flange; 116' S-side; 120-a circuit board; 122. 124-surface; 13-a second fixture; 130-a housing; 130' -card slot elements; 1310' -a clamping portion; 1312' -a groove portion; 130B-a base portion; 130R-recess; 1302-through vias; 1304. 1306-surface; d1, D2-height; h-opening width; l-major axis length; s-minor axis length.

Detailed Description

To make the description of the invention more complete and complete, the following illustrative description is given of examples and embodiments of the invention; it is not intended to be the only form in which the embodiments of the invention may be practiced or utilized. The various embodiments provided below may be advantageously combined with or substituted for one another, or additional embodiments may be added to one embodiment, without further recitation or description.

In the following description, numerous specific details are set forth to provide a thorough understanding of the following embodiments by those skilled in the art. However, embodiments of the invention may be practiced without these specific details. In other instances, well-known structures and devices are shown schematically in order to simplify the drawing.

Please refer to fig. 1. Fig. 1 is a schematic cross-sectional view of a circuit board fixing structure 100 according to the present embodiment. The circuit board fixing structure 100 includes a first fixing member 110 and a circuit board 120. The circuit board 120 may be a computer motherboard (e.g., a server motherboard), or may be a small adapter card or a solid state disk with a specific function, but not limited thereto. In the present embodiment, the circuit board fixing structure 100 also includes a second fixing member 13. One example of the second fixing member 13 in the present invention is a housing 130, and another example will not be mentioned. The housing 130 may be a metal member (e.g., an iron member) or a plastic member, but is not limited thereto. The first mount 110 includes a cylinder 112, a first flange 114, and a second flange 116. The first flange 114 connects the sides 1122 of the cylinder 112. The second flange 116 is connected to the side 1122 of the cylinder 112 and is spaced apart from the first flange 114. In the present embodiment, the first flange 114 and the second flange 116 are annularly disposed on the side 1122 of the cylinder 112. The first and

second flanges

114, 116 are penetrated by the cylinder 112, and the first and

second flanges

114, 116 contact the side 1122 of the cylinder 112. The first fixing member 110 may be made of metal, such as aluminum, carbon steel, but not limited thereto. The first fixing element 110 may be integrally formed, but is not limited thereto. The circuit board 120 is fixedly disposed on a surface 1142 of the first flange 114 away from the second flange 116. In the embodiment, the circuit board 120 and the first fixing element 110 form a surface-mount technology (SMT) structure. After the circuit board 120 and the first fixing member 110 form a surface mount structure with each other, the housing 130 is partially sandwiched between the first flange 114 and the second flange 116. In the present embodiment, one end 1124 of the cylinder 112 passes through the circuit board 120 and is coplanar with the surface 122 of the circuit board 120 facing away from the housing 130, and the first flange 114 is interposed between the end 1124 and the second flange 116. Because no part of the first fixing member 110 protrudes from the surface 122, continuity of a placing space of the components on the circuit board 120 is more complete, and the components can be more flexibly arranged.

Reference is made to fig. 1, 2A and 2B simultaneously. Fig. 2A is a schematic view illustrating the circuit board 120 directly fixed on the first fixing member 110 in this embodiment. As described above, the circuit board 120 is bonded to the first fixing member 110 by using the surface mount technology. Specifically, when the electronic device is manufactured, the circuit board 120 is fixed to the first fixing member 110, and then is manually assembled to a subsequent component, such as the housing 130. Fig. 2B is a perspective view of the circuit board fixing structure 100 in the present embodiment. Fig. 2B optionally does not show the circuit board 120 to clearly illustrate the structural relationship between the housing 130 and the first fixing member 110. In the present embodiment, the housing 130 has a through hole 1302. A portion of the housing 130 is removably secured between the first flange 114 and the second flange 116 through the through-hole 1302, and a portion 1129 of the post 112 between the first flange 114 and the second flange 116 passes through the through-hole 1302. In this embodiment, the first and

second flanges

114, 116

abut opposing surfaces

1304, 1306 of the housing 130, respectively. In this embodiment, only the first flange 114 abuts the surface 1304 of the housing 130. In this embodiment, only the second flange 116 abuts the surface 1306 of the housing 130. In this embodiment, a portion 1129 of the cylinder 112 between the first flange 114 and the second flange 116 abuts the housing 130. Since the portion 1129 of the column 112 between the first flange 114 and the second flange 116 is matched with the first flange 114 and the second flange 116 to clamp the housing 130, and the circuit board 120 is fixedly disposed on the surface 1142 of the first flange 114 away from the second flange 116, more space for routing and disposing components on the circuit board 120 can be saved, and a hole with a larger area on the circuit board 120 can be omitted, thereby optimizing the space utilization of the circuit board 120. A hole with a larger area (for example, but not limited to, a gourd hole) is opened in the housing 130.

Refer to fig. 2B and 2C. Fig. 2C is a perspective view of the circuit board fixing structure 100 in this embodiment. In the present embodiment, the housing 130 includes a base portion 130B and a recess portion 130R connected. The through hole 1302 extends at least to the recess 130R, and the second flange 116 is located in the recess 130R. The recess 130R can receive the second flange 116 of the first fixing element 110 of the clamping housing 130. Since the recess 130R is recessed toward the circuit board 120 (e.g., Z direction shown in fig. 1, 2B and 2C), the second flange 116 is disposed in the recess 130R, which makes the surface of the housing 130 opposite to the circuit board 120 flush with the whole, and there is no appearance that the second flange 116 protrudes (along the negative Z direction) relative to the housing 130.

Refer to fig. 1, 3A, and 3B. Fig. 3A is a schematic side view of the first fixing element 110 in this embodiment. Fig. 3B is a perspective view of the first fixing element 110 in this embodiment. The first fixing member 110 of fig. 3A and 3B may be regarded as an example of the first fixing member 110 of fig. 1. The cylinder 112 illustrated in fig. 3A and 3B is a cylinder and the side 1122 is a cylinder. In the present embodiment, the height D2 of the second flange 116 relative to the side 1122 (along the direction extending along the X-Y plane) of the post 112 is greater than the height D1 of the first flange 114 relative to the side 1122 of the post 112. Reference may be made to the label of fig. 3A and to the first flange 114 and the second flange 116 of fig. 1, 3A and 3B. In such an embodiment, since the second flange 116 protrudes outward from the column 112 than the first flange 114, the contact area between the second flange 116 and the housing 130 is increased, the clamping is more stable, and the circuit board 120 is more stable when being mounted to the housing 130. Meanwhile, since the first flange 114 protrudes less than the second flange 116, the influence on the circuit trace space of the circuit board 120 contacting the surface 124 of the first flange 114 is reduced. Referring to FIG. 3A, in another embodiment, a width W2 of a portion 1129 of the column 112 between the first and second flanges 114, 116 (measured in the direction in which the aforementioned heights D1, D2 extend) is greater than a width W1 of other portions of the column 112. Such an embodiment may further increase the contact area with the housing 130, thereby making the clamping more stable. Of course, embodiments in which the width W1 and the width W2 are the same are not excluded from the invention.

Refer to fig. 4. Fig. 4 is a perspective view of another first fixing element 110A provided in this embodiment. The first fixing member 110A of fig. 4 can be regarded as another variation example of the first fixing member 110. In the present embodiment, the side 1122 of the column 112 has a stop surface 1122S, and the stop surface 1122S may be a flat surface. The benefit of side 1122 including stop surface 1122S is that: when the application is specific, if the stress condition of the circuit board 120 in the application is known in advance, the planar stop surface 1122S facing the stress direction may be disposed according to the specific stress direction. Generally, the plane stop surface 1122S is more resistant to the force applied to the plane than the arc surface or the cylindrical surface of the first fixing element 110 shown in fig. 3A and 3B, so that the circuit board 120 and the peripheral components and the circuit traces can be further protected from being damaged in the specific example.

Refer to fig. 5. Fig. 5 is a perspective view of the first fixing element 110B in the embodiment. The first fixing member 110B of fig. 5 can be regarded as a variation of the first fixing member 110. In the present embodiment, the outer edge of the second flange 116 'has a directionality, which may be understood as a non-circular shape, or as a lateral length of the second flange 116' measured in different directions of extension on the plane of the disk (e.g., the X-Y plane of fig. 1 and 2B) may be different. The viewing direction that is defined as non-circular is the direction in which the pillars 112 extend (e.g., the Z direction in fig. 1 and 2B). For example, as shown in FIG. 5, side 116'S of second flange 116' may be chamfered or planar, which may make first fastener 110B easier to install in a more crowded part layout. In some special cases, only the second flange 116' with a specific direction or geometry can make the first fixing member 110B clamp the housing 130 due to the placement of the parts. The non-circular second flange 116' is more flexible in application than the circular second flange 116 of the first fixing member 110 shown in fig. 3B.

Refer to fig. 6A to 6D. Fig. 6A is a schematic view of a surface of the recess 130R of the housing 130 facing away from the circuit board 120 in the embodiment. Fig. 6B, 6C and 6D are schematic diagrams illustrating an exploded step of mounting the first fixing member 110B to the housing 130 from the perspective of fig. 6A. In the present embodiment, the second flange 116' with non-circular outer edge has directionality, so that it can be rotatably mounted or dismounted on the circuit board 120 in accordance with the shape of the through hole 1302 of the housing 130 extending to the recess 130R. For example, if the outer edge of the second flange 116' is elliptical-like as shown in FIG. 6B. The ellipse-like shape refers to, for example, a straight outer edge at the middle section and arc outer edges at two ends, which are similar to the common playground shape, but not limited thereto. As shown in the figure, the major axis length L of the quasi-elliptical shape is greater than the maximum opening width H of the through hole 1302 on the recessed portion 130R, and the opening width H is greater than the minor axis length S of the quasi-elliptical shape. Under this arrangement, the first fixing member 110 may be rotated to make the extending direction of the major axis length L of the second flange 116' face the through hole 1302, so as to pass the second flange 116' through the maximum opening width H of the through hole 1302 of the housing 130 on the recess 130R (refer to fig. 6B to 6C), and then rotate the second flange 116' by 90 degrees to form a fixed position (refer to fig. 6C to 6D). At this time, since the major axis length L of the quasi-elliptical shape is greater than the opening width H and the extending direction of the major axis length L is parallel to the extending direction of the opening width H, the first fixing member 110B does not slip out of the through hole 1302 of the housing 130 due to external force. When the circuit board 120 needs to be detached, the circuit board 120 together with the first fixing member 110B is rotated by 90 degrees again, and the second flange 116' exits the recess 130R of the housing 130 through the through hole 1302 along the extending direction of the long axis length L (refer back to fig. 6D, and return to fig. 6B through fig. 6C).

Refer to fig. 7A and 7B. Fig. 7A is a perspective view of the card slot element 130' in the present embodiment. Fig. 7B is a perspective view illustrating the first fixing member 110 and the slot element 130' clamped together in the embodiment. Specifically, in addition to the housing 130, in the present embodiment, the second fixing member 13 may also be a card slot element 130'. The card slot element 130 'retains the second flange 116, or the first flange 114 and the second flange 116 retain the card slot element 130'. In this embodiment, the slot member 130 'has a grip portion 1310' and a recessed portion 1312', an upper edge of the recessed portion 1312' being defined by the grip portion 1310', and a portion 1129 of the post 112 between the first flange 114 and the second flange 116 being grippable to the upper edge of the recessed portion 1312'. In this configuration, the side of the card slot element 130' facing away from the first fixing element 110 may be further connected to other components, such as another housing, another circuit board, etc., to expand the application flexibility and structural variation of the circuit board fixing structure 100.

In summary, the circuit board fixing structure provided by the embodiment transfers the opening of the hole to the housing to a large extent, so as to overcome the defects that the circuit board needs to be provided with the gourd-shaped hole and the wiring and the component installation space are sacrificed due to the fixing of the two sides of the circuit board to the first fixing element in the prior art.

Based on the foregoing embodiments of the present invention, the present invention can be applied to various forms of Computer Architecture (Computer Architecture), such as network communication devices, industrial computers, servers and their peripherals, and can be further applied to Artificial Intelligence (AI) operation, edge computing (edge computing) operation, cloud computing server, cloud storage server, 5G server or car networking server.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A circuit board fixing structure, comprising:

a first fastener, comprising:

the device comprises a column body, a first fixing device and a second fixing device, wherein one side surface of the column body is provided with a stop surface which is a plane;

a first flange connected to a side of the column; and

a second flange connected to the side of the column and spaced apart from the first flange, wherein a height of the second flange relative to the side of the column is greater than a height of the first flange relative to the side of the column; and

and the circuit board is fixedly arranged on one surface of the first flange, which is far away from the second flange, and forms a surface adhesion structure with the first fixing piece.

2. The circuit board fixing structure according to claim 1, further comprising a second fixing member partially sandwiched between the first flange and the second flange.

3. The circuit board fixing structure according to claim 2, wherein the second fixing member is a housing.

4. The circuit board fixing structure according to claim 3, wherein the housing has a through hole, a portion of the column between the first flange and the second flange passes through the through hole, and the first flange and the second flange abut against opposite surfaces of the housing, respectively.

5. The circuit board fixing structure according to claim 3, wherein the housing has a through hole through which the column is located between the first flange and the second flange and through which the second flange passes, the housing includes a base portion and a recessed portion connected, the through hole extends at least to the recessed portion, and the second flange is located in the recessed portion.

6. The circuit board fixing structure according to claim 3, wherein one end of the post passes through the circuit board and is coplanar with a surface of the circuit board facing away from the housing, and the first flange is interposed between the one end and the second flange.

7. The circuit board fixing structure according to claim 2, wherein the second fixing member is a card slot member, wherein the card slot member holds the second flange, or the first flange and the second flange hold the card slot member, the card slot member has a groove portion, and a portion between the first flange and the second flange is held in the groove portion at an upper edge of the card slot member.

8. The circuit board fixing structure according to claim 2, wherein the second fixing member is a card slot member having a groove portion, and a portion of the second flange is held in the groove portion.

9. The circuit board fixing structure according to claim 1, wherein an outer edge of the second flange has directivity.