TWI775598B - Fixing structure for circuit board - Google Patents

Abstract

A fixing structure for circuit board includes a buckle bump and a fixing piece. The buckle bump is formed by protruding a buckle area of a casing toward a convex direction, and has a buckle edge. An insertion opening is formed between the buckle edge and the casing. The buckle bump defines a concave edge from the edge of the buckle toward an insertion direction. The fixing piece includes a locking section, a supporting and fixing section, a connecting section and a engaging section in sequence along a locking direction. The locking section has a locking hole opened along the locking direction for a locking member to fix a circuit board. The supporting and fixing section is connected to the locking section. The connecting section is connected to the supporting and fixing section for inserting into the concave edge along the insertion direction. The engaging section is fixedly connected to the connecting section, and is used to clamp the buckle bump with the supporting and fixing section after the connecting section is inserted into the concave edge.

Description

Circuit board fixing structure

The present invention relates to a circuit board fixing structure, in particular to a circuit board fixing structure for assembling a circuit board to a casing.

Please refer to the first figure. The first figure is a schematic exploded perspective view of the circuit board of the prior art being locked to the server case through the locking support structure. As shown in the first figure, a server casing PA1 is provided with a locking support structure PA2, which is used to lock a locking hole PA31 of the circuit board PA3 when a circuit board PA3 is installed on the server casing PA1 On the locking support structure PA2.

Please continue to refer to the second figure. The second figure is an exploded perspective view showing that the server casing of the prior art is provided with another locking support structure for installing another circuit board. As shown in the first and second pictures, generally speaking, the size of the server case PA1 is usually not changed, but the specifications of the circuit board PA3 are often changed in size in order to meet new technologies, specifications or changes in design. For example, the size of the circuit board PA3a of another specification is different from the size of the circuit board PA3, and although the circuit board PA3a can be universally used in the server case PA1, its size changes are limited, but due to the circuit board PA3a The keyhole PA31a often needs to be changed in order to match the optimized circuit design, so the keyhole PA31a of the circuit board PA3a often cannot be used for the locking support structure PA2 of the server case PA1 for the circuit board PA3.

Based on the above, in order to allow the circuit board PA3a to be installed on the server case PA1, another locking support structure PA2a is usually installed on the existing server case PA1, so that the lock hole PA31a of the circuit board PA3a can be installed. The corresponding locking is secured to the locking support structure PA2a. Among them, the locking support structure PA2a is a support column (standoff), but another locking support structure PA11 can also be used, and the locking support structure PA11 is an anthill structure (anthill), in practice, the support column and the anthill structure The only difference is that the support column is additionally locked and combined with the server casing PA1, and the anthill structure is an integrally formed structure punched out by the server casing PA1 through a stamping process.

Please continue to refer to Figures 3 and 4. Figure 3 is an exploded perspective view showing that the prior art server case is provided with another locking support structure and cannot be installed with the original circuit board; Figure 4 is the third A-A cross-sectional schematic diagram of the figure. As shown in Figures 1 to 4, when the server case PA1 is used for users who need to assemble the circuit boards PA3 and PA3a at the same time, the locking support structures PA2 and PA2a are usually installed on the server at the same time. On the chassis PA1, for the user to selectively disassemble and assemble, but because the specifications and dimensions of the server chassis PA1 are unchanged, in practice, it often happens that the user does not attach the locking support structure PA2a from the server chassis PA1. In the case of removing the above, the circuit board PA3 is to be installed on the server case PA1, so that the circuit board PA3 will directly collide with the locking support structure PA2a at the position corresponding to the locking support structure PA2a, and the circuit board PA3 is not. The area with the keyhole PA31 is usually provided with other electronic components. Therefore, when the circuit board PA3 is to be installed on the server case PA1 with the locking support structure PA2a, the electronic components on the circuit board PA3 may easily be damaged. It may be damaged by collision, and may even be deformed and damaged due to the mismatch of size.

In view of the fact that in the prior art, in order to install circuit boards of different specifications in the existing server case, a fixed support structure is usually added according to different installation positions. However, when the user does not adjust the fixed support structure for the circuit board to be installed When the position and quantity of the circuit board are installed, it is very likely that the circuit board will collide with the non-corresponding fixed support structure, thereby causing damage to the parts on the circuit board, or causing the circuit board to deform. Therefore, the main purpose of the present invention is The purpose is to provide a circuit board fixing structure, which can be used for circuit boards with different locking positions together with the existing fixing support structure, so as to fix the circuit board to the casing according to the locking position of the circuit board, and can avoid the circuit board The electronic components are excessively squeezed, resulting in damage to the electronic components or deformation of the circuit board.

In order to solve the problems of the prior art, the necessary technical means adopted by the present invention is to provide a circuit board fixing structure for fixing a circuit board to a casing. The circuit board fixing structure includes a snap boss and a fixing structure. pieces.

The buckle boss is formed by protruding a buckle area of the casing toward a convex direction, and a buckle space is formed on an outer surface of the casing away from the convex direction, and has a buckle edge, and the buckle An inserting opening is formed between the edge system and the casing, and a concave edge is formed on the buckling boss along an insertion direction from the buckling edge toward the inserting direction.

The fixing member includes a locking section, a supporting and fixing section, a connecting section and a locking section in sequence along a locking direction. The locking section has a locking hole opened along the locking direction for a locking member to pass through the circuit board along the locking direction to fix the locking member, thereby fixing the circuit board.

The supporting and fixing section is fastened to the locking section, and a maximum distance between the center and the edge of the supporting and fixing section is greater than a radius of a locking section of the locking section. The connecting section is fastened to the supporting and fixing section for inserting into the concave edge along the insertion direction. The engaging section is fastened to the connecting section, and is used for clamping the locking boss with the supporting and fixing section after the connecting section is inserted into the concave edge.

In an auxiliary technical means derived from the above-mentioned necessary technical means, the supporting and fixing section has two mutually parallel side surfaces.

In an auxiliary technical means derived from the above-mentioned necessary technical means, the connecting segment has a connecting segment radius, and the connecting segment radius is smaller than the maximum distance. Preferably, the engaging segment has a radius of the engaging segment, and the radius of the engaging segment is larger than the radius of the connecting segment.

In an auxiliary technical means derived from the above-mentioned necessary technical means, the concave edge has a concave edge depth along the insertion direction, and the concave edge depth is greater than the diameter of the connecting section.

In an auxiliary technical means derived from the above-mentioned necessary technical means, the engaging section has a conical peripheral surface, and the conical peripheral surface is tapered from bottom to top.

In an auxiliary technical means derived from the above-mentioned necessary technical means, the locking hole is a screw hole.

In an auxiliary technical means derived from the above-mentioned necessary technical means, the supporting and fixing section is integrally connected to the locking section, the connecting section is integrally joined to the supporting and fixing section, and the engaging section is integrally formed connected to the link segment.

The circuit board fixing structure of the present invention mainly utilizes the cooperation between the buckle boss and the fixing member, so that when the lock hole of the circuit board does not fit the casing, the buckle boss provided on the circuit board will not contact the circuit board. When the lock hole of the circuit board corresponds to the buckle boss, the fixing member of the present invention can be locked at the lock hole, so that the circuit board can be locked through the cooperation of the fixing member and the buckle boss. Fixing the circuit board on the casing can effectively increase the flexibility during assembly, and can effectively prevent the circuit board from being damaged due to inconsistent specifications.

The specific embodiments adopted by the present invention will be further described by the following embodiments and drawings.

Please refer to Figures 5 to 9. Figure 5 is a schematic exploded perspective view of the circuit board fixing structure of the present invention for fixing the circuit board to the casing; Figure 6 is a schematic perspective view of Figure 5 after assembly; Figure 6 Figure 7 is a schematic plan view of the locking boss of the present invention disposed on the casing; Figure 8 is a schematic cross-sectional view of Figure 6 B-B; Figure 9 is a schematic exploded cross-sectional schematic view of Figure 8 .

As shown in FIGS. 5 to 7 , a circuit board fixing structure 100 is used for fixing a circuit board 200 to a casing 300 .

The circuit board fixing structure 100 includes a snap boss 1 and a fixing member 2 . The buckle boss 1 is formed by protruding a buckle area SA of the casing 300 toward a convex direction D1, and a buckle space SS is formed on the outer surface of the casing 300 facing away from the convex direction D1 (marked in No. nine pictures). In addition, the buckle boss 1 has a buckle edge 11, an insertion opening 10 is formed between the buckle edge 11 and the casing 300, and the buckle boss 1 is further opened from the buckle edge 11 along an insertion direction D2 A concave edge 111, and the concave edge 111 has a concave edge depth d1 in this embodiment.

Please continue to refer to FIG. 10, which is a schematic cross-sectional view of the fixing member of the present invention. As shown in Figures 5 to 10. The fixing member 2 includes a locking section 21 , a supporting and fixing section 22 , a connecting section 23 and a locking section 24 in sequence along a locking direction D3 .

The locking section 21 has a locking hole 211 opened along the locking direction D3 for a locking member 400 to pass through the locking hole 201 of the circuit board 200 along the locking direction D3 to fix the locking member 400 , so that the fixing member 200 can be fixed. fixed on the circuit board 200 . The locking section 21 is a cylinder in this embodiment, the locking hole 211 is a screw hole, and the locking section 21 has a locking section radius d2.

The supporting and fixing section 22 is integrally formed and fixed to the locking section 21 . Among them, the supporting and fixing section 22 is a kind of elliptical sheet body in this embodiment, and in more detail, the supporting and fixing section 22 in this embodiment is cut out two parallel sides 221 ( Only one is marked in the figure) to form an elliptical sheet. In addition, a maximum distance d3 between the center and the edge of the supporting and fixing section 22 is greater than the locking section radius d2 of the locking section 21 .

The connecting section 23 is integrally fixed to the supporting and fixing section 22 for being inserted into the concave edge 111 along the insertion direction D2. The connecting section 23 is also a cylinder in this embodiment, and the connecting section 23 has a connecting section radius d4 which is smaller than the maximum distance d3 between the center and the edge of the supporting and fixing section 22 . In addition, the diameter of the connecting section 23 (ie twice the connecting section radius d4 ) is smaller than the above-mentioned depth d1 of the concave edge.

The engaging section 24 is fastened to the connecting section 23 and used to clamp the locking boss 1 with the supporting and fixing section 22 after the connecting section 23 is inserted into the concave edge 111 . The engaging segment 24 has an engaging segment radius d5, and the engaging segment radius d5 is greater than the connecting segment radius d4. In addition, the engaging section 24 also has a tapered peripheral surface 241 tapered from bottom to top.

Please continue to refer to Figures 11 to 12. Figure 11 is a schematic cross-sectional view of the fixing member of the present invention being locked to the circuit board through the fastener; Figure 12 is the fixing member of the present invention after the fixing member is fixed on the circuit board. , a schematic cross-sectional view of the insertion opening.

As shown in FIGS. 5 to 12, in practice, the user can first pass the locking section 21 of the fixing member 2 through the locking hole 201 of the circuit board 200, and then use the locking member 400 to face each other from the circuit board 200. The other side of the fixing member 2 is locked into the locking hole 211 of the locking section 21, so that the fixing member 2 is fixed to the circuit board 200; wherein, since the supporting and fixing section 22 in this embodiment has two side surfaces 221 parallel to each other, Therefore, the user can use the clamping tool to clamp the two side surfaces 221 to rotate the fixing portion of the fixing member 2 , and then the user can rotate the locking member 400 relative to the fixing member 2 to lock the locking member 400 into the locking hole 211 .

Next, align the fixing member 2 with the insertion opening 10, and move the circuit board 200 together with the fixing member 2 along the locking direction D3, so that the fixing member 2 can be placed in front of the insertion opening 10 and attached to the surface of the circuit board 200 .

Finally, the circuit board 200 is moved along the insertion direction D2, so that the fixing member 2 can be inserted into the buckle boss 1 through the insertion opening 10 along the insertion direction D2. At this time, the connecting section 23 will penetrate into the concave edge 111, and The engaging section 24 will go deep into the snapping space SS, and the supporting and fixing section 22 will be located on the other side of the snapping boss 1 relative to the engaging section 24, so that the supporting and fixing section 22 and the engaging section 24 will be opposite to each other. Clamp the snap boss 1. Since the engaging section 24 of this embodiment further has a tapered peripheral surface 241 , when the fixing member 2 moves along the insertion direction D2 , the tapered peripheral surface 241 can be in contact with the locking boss 1 , and further The guide engaging segment 24 penetrates into the engaging space SS.

Please refer to Figure 13. Figure 13 is a schematic cross-sectional view showing that when another circuit board is locked to the casing, the electronic components disposed on the circuit board do not touch the snap-on bosses. As shown in FIG. 13, when another circuit board 200a having a different size and specification from the circuit board 200 is to be installed and fixed to the casing 300, since the locking hole 201a of the circuit board 200a does not correspond to the buckle boss 1, it is necessary to The lock hole 201a is fixed on the circuit board 200a through the locking member 400a through the original locking support structure 500, so the position of the circuit board 200a corresponding to the buckle boss 1 is usually provided with electronic components because the lock hole is not provided 202a, at this time, the buckle boss 1 of the present invention does not directly contact the circuit board 200a to provide support, so that the buckle boss 1 and the circuit board 200a are spaced apart from each other, so the electronic component 202a is mounted on the circuit board 200a. When placed on the casing 300 , it will not be contacted and collided by the buckle boss 1 .

In addition, even if the size of the electronic component 202a is large enough to be in contact with the snap boss 1, the low-height design of the snap boss 1 can effectively reduce the extent of the circuit board 200a being stretched and deformed.

To sum up, compared with the prior art, the server case is provided with fixed support structures in order to be able to install circuit boards of different specifications. The original circuit board may cause damage to the parts on the circuit board, or cause the circuit board to deform; the circuit board fixing structure of the present invention mainly utilizes the cooperation between the buckle boss and the fixing member, so that the keyhole of the circuit board is connected to the machine. When the shell is not closed, the snap bosses on the circuit board will not contact the electronic components on the circuit board, and when the lock holes on the circuit board correspond to the snap bosses, they can be locked at the lock holes. The fixing member of the present invention enables the circuit board to be fixed to the casing through the cooperation between the fixing member and the buckle boss, which effectively increases the flexibility during assembly and can effectively prevent the circuit board from being damaged due to inconsistent specifications. .

In an embodiment of the present invention, the casing to which the circuit board fixing structure of the present invention is applied is a server casing, and the server can be used for artificial intelligence (English: Artificial Intelligence, AI for short) computing, edge computing ( Edge Computing), it can also be used as a 5G server, cloud server or Internet of Vehicles server.

Through the detailed description of the preferred embodiments above, it is hoped that the features and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various modifications and equivalent arrangements within the scope of the claimed scope of the present invention.

PA1: Server case PA2: Locking support structure PA3,PA3a: circuit board PA31,PA31a: keyhole PA11,PA2a: Locking support structure 100: Circuit board fixing structure 1: Snap boss 11: Snap edge 111: concave edge 2: Fasteners 21: Locking segment 211: Lock hole 22: Support fixed segment 221: Side 23: Link segment 24: Engagement segment 241: Conical peripheral surface 200, 200a: circuit boards 201, 201a: Keyhole 202a: Electronic Components 300: Chassis 400, 400a: Locker 500: Locking Support Structure D1: bulge direction D2: Insertion direction D3: Locking direction d1: depth of concave edge d2: radius of locking segment d3: maximum distance d4: link segment radius d5: radius of engagement segment SA: Snap area SS: Snap space IO: Insertion opening

The first figure is an exploded perspective view showing the circuit board of the prior art being locked to the server case through the locking support structure; The second figure is an exploded perspective view showing that the server case of the prior art is provided with another locking support structure for installing another circuit board; Figure 3 is an exploded perspective view showing that the server case of the prior art is provided with another locking support structure and cannot be installed with the original circuit board; The fourth figure is the A-A cross-sectional schematic diagram of the third figure; Figure 5 is an exploded perspective view showing the circuit board fixing structure of the present invention for fixing the circuit board to the casing; The sixth figure is a three-dimensional schematic diagram after the assembly of the fifth figure; Fig. 7 is a schematic plan view of the locking boss of the present invention disposed on the casing; The eighth figure is a schematic diagram of the B-B cross-section of the sixth figure; The ninth figure is a schematic cross-sectional exploded view of the eighth figure; Figure 10 is a schematic cross-sectional view of the fastener of the present invention; Fig. 11 is a schematic cross-sectional view of the fixing member of the present invention being locked to the circuit board through the locking member; Figure 12 is a schematic cross-sectional view of the fixing element of the present invention being placed in the insertion opening after being fixed on the circuit board; and Figure 13 is a schematic cross-sectional view showing that when another circuit board is locked to the casing, the electronic components disposed on the circuit board do not touch the snap-on bosses.

100: Circuit board fixing structure

1: Snap boss

2: Fasteners

200: circuit board

300: Chassis

400: Lock firmware

Claims (8)

A circuit board fixing structure is used for universally fixing a circuit board or another circuit board with a size and specification different from the circuit board to a casing. The circuit board fixing structure comprises: a snap boss, It is formed by protruding a buckle area of the casing toward a convex direction, and a buckle space is formed on an outer surface of the casing facing away from the convex direction, which has a buckle edge. The buckle edge An insertion opening is formed between the system and the casing, and a concave edge is formed on the buckle protruding platform from the buckle edge toward an insertion direction; a fixing piece includes in sequence along a locking direction: The segment has a locking hole opened along the locking direction for a locking member to pass through the circuit board or the other circuit board along the locking direction to fix the locking member, thereby fixing the circuit board or the circuit board. Another circuit board; a supporting and fixing section, fastened to the locking section, and a maximum distance between the center and the edge of the supporting and fixing section is greater than a radius of the locking section of the locking section; a connecting section, fastened to the support-fixing section for inserting into the concave edge along the insertion direction; and a snap-fit section fastened to the connecting section for fixing with the support after the connecting section is inserted into the concave edge and a locking support structure is arranged on the casing, and the locking support structure is a support column; wherein, when the circuit board is fixed on the casing, the locking support In addition to the locking support structure, the electrical The circuit board is fixed to the casing; when the other circuit board is fixed to the casing, the fixing member is removed, so that the other circuit board is fixed to the casing through the locking support structure, and the other circuit board is The snap boss and the other circuit board are spaced apart from each other. The circuit board fixing structure according to claim 1, wherein the supporting and fixing section has two side surfaces parallel to each other. The circuit board fixing structure of claim 1, wherein the connecting segment has a connecting segment radius, and the connecting segment radius is smaller than the maximum distance. The circuit board fixing structure of claim 3, wherein the engaging segment has a radius of the engaging segment, and the radius of the engaging segment is larger than the radius of the connecting segment. The circuit board fixing structure of claim 1, wherein the concave edge has a concave edge depth along the insertion direction, and the concave edge depth is greater than the diameter of the connecting section. The circuit board fixing structure according to claim 1, wherein the engaging section has a tapered peripheral surface, and the tapered peripheral surface is tapered from bottom to top. The circuit board fixing structure according to claim 1, wherein In the middle, the locking hole is a screw hole. The circuit board fixing structure of claim 1, wherein the supporting and fixing section is integrally connected to the locking section, the connecting section is integrally connected to the supporting and fixing section, and the engaging section is integrally formed connected to the link segment.

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