Fastening structure and electronic device

Abstract

The invention relates to a fastening structure and an electronic device. The fastening structure is used for fixing a circuit board and comprises a structural plate, a detachable base and a fastener, the detachable base sequentially comprises a bottom, a matching part and a connecting part in one direction, and the matching part is detachably arranged in a non-circular through hole of the structural plate in a clearance fit mode; the bottom and the connecting part are located on the two sides of the structural plate in the direction, the projection, on the structural plate, of the matching part is located in the non-circular through hole, and the projection, on the structural plate, of the bottom protrudes out of the non-circular through hole. The matching part is matched with the non-circular through hole in outline so as to prevent the matching part from rotating relative to the structural plate, and the fastener is detachably connected with the connecting part. The electronic device comprises a circuit board and a case with the fastening structure, wherein the circuit board is fixed in the case through the fastening structure.

Description

Technical Field

[0001] The present application relates to the technical field of electronic devices, and in particular to a fastening structure and an electronic device. Background Art

[0002] In principle, the circuit boards in electronic devices need to be effectively fixed to facilitate stable operation. Some circuit boards are directly fixed to the tray in the device housing using multiple screws. In one example, the tray is provided with corresponding fixed threaded holes for the corresponding screws to be locked in; in practice, this fixing method can be used in conjunction with the use of spacer columns. In addition, some circuit boards are fixed to the tray in the device housing using multiple sets of slider / guide groove structures and supplemented by one or more fixing screws. In this example, a slider structure (such as a plastic spacer column, one end of which is inserted into the hole in the circuit board and the other end is formed with a T-shaped column) is fixed to the circuit board, and a corresponding guide groove structure is formed on the tray for the slider structure to slide in. Summary of the invention

[0003] Based on this, it is necessary to provide a fastening structure and an electronic device to fix the circuit board.

[0004] According to one aspect of the present application, there is provided a fastening structure suitable for fixing a circuit board, the fastening structure comprising:

[0005] A structural plate having a non-circular through hole;

[0006] A removable base, the removable base comprising a bottom, a matching portion and a connecting portion in sequence along a direction, the matching portion being disposed in the non-circular through hole in a clearance-matching manner, the bottom and the connecting portion being located on both sides of the structural plate in the direction, the projection of the matching portion on the structural plate being located within the non-circular through hole, the projection of the bottom on the structural plate being protruding from the non-circular through hole, the matching portion matching the contour of the non-circular through hole to prevent the matching portion from rotating relative to the structural plate; and

[0007] A fastener, detachably connected to the connecting portion;

[0008] The circuit board is fixed to the structural plate by the fastener being detachably connected to the connecting portion, and the fastener is tightly against the circuit board.

[0009] According to another aspect of the present application, an electronic device is provided, including:

[0010] A chassis, the chassis comprising the fastening structure as described in any of the above embodiments; and

[0011] A circuit board is fixed in the chassis through the fastening structure.

[0012] Therefore, in actual use, after the circuit board is placed on the structural plate, the removable base is installed upward from the bottom of the structural plate; wherein the connecting portion of the removable base passes through the non-circular through hole of the structural plate, and the matching portion of the removable base is located in the non-circular through hole. Then, the fastener is removably connected with the connecting portion of the removable base from the top of the circuit board downward and pressed against the circuit board to fix the circuit board on the structural plate. wherein, by matching the matching portion with the contour of the non-circular through hole, the matching portion can be prevented from rotating relative to the structural plate, so that when the fastener is connected with the removable base, it is only necessary to simply hold the removable base to prevent it from falling, and no additional tools are needed to prevent the removable base from rotating relative to the structural plate. In addition, the removable base and the fastener can be removed from the structural plate when not in use.

[0013] The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a partial exploded view of an electronic device in one embodiment of the present application.

[0015] Figure 2 for Figure 1 An exploded view of the structure at circle A in the illustrated embodiment.

[0016] Figure 3 for Figure 1 A cross-section along line XX in the illustrated embodiment.

[0017] Brief description of component symbols:

[0018] 1: Electronic device 10: Circuit board

[0019] 102: Through hole 104: Washer

[0020] 12: Chassis 122: Bottom shell

[0021] 124: Upper cover 126: Fastening structure

[0022] 1262: Structural plate 12621: Boss

[0023] 12622: Non-circular through hole 12623: Avoidance space

[0024] 12624: Straight edge 1264: Removable base

[0025] 12641: Bottom 12642: Mating part

[0026] 12643: Connecting part 12644: External thread

[0027] 12645: Guide groove 1266: Fastener

[0028] 12661: Connecting piece 12662: Rotatable piece

[0029] 12663: Elastic part 12664: Internal thread

[0030] 12665: convex column 12666: lower edge

[0031] 90: Direction DETAILED DESCRIPTION

[0032] See also Figure 1 The electronic device 1 provided in one embodiment of the present application mainly includes a circuit board 10 (shown in the figure as a single board structure to simplify the drawing), a chassis 12 for accommodating the circuit board 10, and other components (not shown in the figure, such as storage devices, heat dissipation systems, power modules, etc.) accommodated in the chassis 12. The chassis 12 includes a bottom shell 122, an upper cover 124, and a structure for fixing the circuit board 10, and the structure includes at least one fastening structure 126. The bottom shell 122 and the upper cover 124 are detachably connected to form a housing space to accommodate the aforementioned components.

[0033] See also Figure 2 and Figure 3 The fastening structure 126 includes a structural plate 1262, a removable base 1264 and a fastener 1266. The structural plate 1262 has a boss 12621, and the structural plate 1262 has a non-circular through hole 12622 on the top of the boss 12621. Figure 3 From a perspective, that is, below the boss 12621) forms an escape space 12623. The removable base 1264 is moved along direction 90 (indicated by a double-headed arrow at Figure 312642 and the connecting portion 12643. The cross section of the connecting portion 12643 is smaller than the profile (or hole cross section) of the non-circular through hole 12622, the matching portion 12642 matches the profile of the non-circular through hole 12622, and the cross section of the bottom 12641 is larger than the cross section of the matching portion 12642. The connecting portion 12643 has an external thread 12644 and a guide groove 12645 located in the middle, and the guide groove 12645 extends parallel to the direction 90; in this embodiment, the guide groove 12645 actually runs through the entire detachable base 1264, but it is not limited to this in practice. The fastener 1266 includes a connecting member 12661, a rotatable member 12662 and an elastic member 12663. The connecting member 12661 has an internal thread 12664, which can be connected with the external thread 12644 of the connecting portion 12643 of the removable base 1264. The rotatable member 12662 is rotatably connected to the connecting portion 12661 and can move parallel to the direction 90. The rotatable member 12662 has a protrusion 12665 ​​that protrudes downward from the lower edge 12666 ( Figure 3 ). The elastic member 12663 elastically abuts between the connecting member 12661 and the rotatable member 12662 to drive the boss 12665 ​​to move downward relative to the connecting member 12661. In addition, in this embodiment, the structure plate 1262 is structurally integrated with the chassis 12, and the structure plate 1262 is a part of the bottom of the bottom shell 122; but the implementation is not limited to this. For example, the structure plate 1262 is a part of a support plate, and the support plate is fixed to the bottom shell 122 by other fixing means (such as screw locking).

[0034] like Figure 3As shown, the circuit board 10 can be fixed in the chassis 12 through the fastening structure 126. In the actual fixing operation, the circuit board 10 is first placed on the structural plate 1262, so that the through hole 102 of the circuit board 10 is aligned with the non-circular through hole 12622 of the structural plate 1262. The connecting portion 12643 of the removable base 1264 is aligned with the non-circular through hole 12622 from the bottom of the structural plate 1262 and moved upward, so that the connecting portion 12643 passes through the non-circular through hole 12622 and the through hole 102 of the circuit board 10 and protrudes from the through hole 102, and the bottom 12641 of the removable base 1264 is stopped by the structural plate 1262, and the matching portion 12642 is located in the non-circular through hole 12622. At this time, the removable base 1264 is against the structural plate 1262, the bottom 12641 and the connecting portion 12643 are located on both sides of the structural plate 1262 in the direction 90, and the bottom 12641 is completely accommodated in the avoidance space 12623. Among them, the matching portion 12642 is arranged in the non-circular through hole 12622 in a clearance fit manner (for example but not limited to, the clearance between the matching portion 12642 and the non-circular through hole 12622 can be designed to be about 0.05mm, that is, the size difference is 0.10mm), so in the above-mentioned process of moving the removable base 1264 upward, the user can easily implement it by hand without using tools.

[0035] On the other hand, the projection of the connecting portion 12643 of the removable base 1264 on the structural plate 1262 is located within the non-circular through hole 12622 of the structural plate 1262, that is, the cross section of the connecting portion 12643 is smaller than the profile (or hole cross section) of the non-circular through hole 12622, so that the connecting portion 12643 can easily pass through the non-circular through hole 12622. The projection of the bottom 12641 of the removable base 1264 on the structural plate 1262 protrudes from the non-circular through hole 12622, so that the bottom 12641 cannot pass through the non-circular through hole 12622 in the direction 90. In this embodiment, the non-circular through hole 12622 is completely located within the projection of the bottom 12641 on the structural plate 1262. In addition, the projection of the matching portion 12642 of the removable base 1264 on the structural plate 1262 is located within the non-circular through hole 12622. The mating portion 12642 of the removable base 1264 matches the contour of the non-circular through hole 12622 of the structural plate 1262 to prevent the mating portion 12642 from rotating relative to the structural plate 1262, so that when the removable base 1264 is connected to the fastener 1266, the user does not need to apply additional force or use tools to prevent the removable base 1264 from rotating relative to the structural plate 1262.

[0036] Next, the user can control the fastener 1266 through the tool to make the connecting member 12661 of the fastener 1266 connect with the connecting portion 12643 of the detachable base 1264 (i.e., rotate the connecting member 12661 so that its internal thread 12664 connects with the external thread 12644 of the connecting portion 12643). Among them, because the boss 12665 ​​of the rotatable member 12662 of the fastener 1266 protrudes relative to the lower edge 12666 of the connecting member 12661, the boss 12665 ​​can enter the guide groove 12645 before the connecting member 12661 contacts the connecting portion 12643 (i.e., the boss 12665 ​​is inserted into the guide groove 12645 before the external thread 12644 connects with the internal thread 12664). This structural feature enables the guide groove 12645 to position the boss 12665 ​​, that is, to align the internal thread 12664 with the external thread 12644 , so that the two can be correctly rotated and connected, making it convenient for the user to screw and lock the fastener 1266 .

[0037] Thus, the fastener 1266 (the connecting member 12661 thereof) is removably connected to the removable base 1264 (the connecting portion 12643 thereof). The circuit board 10 is fixed to the structural plate 1262 by the removable connection between the fastener 1266 and the removable base 1264, and the fastener 1266 is tightly against the circuit board 10; that is, the circuit board 10 is fixed in the chassis 12 through the fastening structure 126.

[0038] In addition, in this embodiment, a washer 104 is provided on the circuit board 10, which surrounds the through hole 102. The lower edge 12666 of the connecting member 12661 of the fastener 1266 is pressed against the washer 104, that is, indirectly pressed against the circuit board 10. The washer 104 can withstand deformation to prevent the lower edge 12666 of the connecting member 12661 from causing damage to the circuit board 10 due to rotation. The washer 104 is made of an insulating material and can also provide an insulating effect. In addition, in this embodiment, the lower edge 12666 of the connecting member 12661 forms a rough surface or a serrated or wavy structure, which helps the lower edge 12666 of the connecting member 12661 and the washer 104 to engage with each other, and helps maintain the stability of the connection between the fastener 1266 and the removable base 1264.

[0039] In addition, in this embodiment, the matching of the profile of the matching portion 12642 of the removable base 1264 and the non-circular through hole 12622 of the structural member 1262 is achieved by the cross section of the matching portion 12642 (perpendicular to the direction 90) being similar to the profile of the non-circular through hole 12622. In this embodiment, the non-circular through hole 12622 has a straight edge 12624, which can make the matching portion 12642 unable to rotate relative to the non-circular through hole 12622. In addition, in this embodiment, the non-circular through hole 12622 is a cut-edge circular hole, which is a D-shaped hole. In practice, the profile of the non-circular through hole 12622 can also be other non-circular geometric shapes, such as a polygon, a star, a straight edge and a curved edge, etc. In addition, in practice, the matching of the profile of the matching portion 12642 of the removable base 1264 and the non-circular through hole 12622 of the structural member 1262 is not limited to the similarity of the profiles of the two. For example, the non-circular through hole 12622 is implemented as a square hole, and the cross-sectional profile of the matching portion 12642 can be an octagon, which can also achieve the effect of preventing the matching portion 12642 from rotating relative to the structural member 1262.

[0040] In addition, after the circuit board 10 is fixed in the chassis 12 by the fastening structure 126 , if the circuit board 10 is to be removed from the chassis 12 , the above-mentioned installation method can be reversed, which will not be described in detail.

[0041] In addition, in one embodiment of the present invention, the electronic device of the present invention may be a server, which may be used for artificial intelligence (AI) computing, edge computing, and may also be used as a 5G server, a cloud server, or an Internet of Vehicles server.

[0042] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the present invention.

Claims

1. A fastening structure, suitable for fixing a circuit board, characterized in that: The fastening structure comprises: A structural plate having a non-circular through hole; A removable base, the removable base comprising a bottom, a matching portion and a connecting portion in sequence along a direction, the matching portion being disposed in the non-circular through hole in a clearance-matching manner, the bottom and the connecting portion being located on both sides of the structural plate in the direction, the projection of the matching portion on the structural plate being located within the non-circular through hole, the projection of the bottom on the structural plate being protruding from the non-circular through hole, the matching portion matching the contour of the non-circular through hole to prevent the matching portion from rotating relative to the structural plate; and A fastener, detachably connected to the connecting portion; The circuit board is fixed to the structural plate by the fastener being detachably connected to the connecting portion, and the fastener is tightly against the circuit board.

2. The fastening structure according to claim 1, characterized in that: The structural plate has a boss, the non-circular through hole is formed on the top of the boss, an escape space is formed inside the boss, and the bottom of the detachable base is accommodated in the escape space.

3. The fastening structure according to claim 1, characterized in that: The non-circular through hole is located within the projection of the bottom on the structural plate.

4. The fastening structure according to claim 1, characterized in that: The projection of the connecting portion on the structural plate is located within the non-circular through hole.

5. The fastening structure according to claim 1, characterized in that: The connecting portion has an external thread, the fastener has an internal thread, and the connecting portion and the fastener are connected through the external thread and the internal thread.

6. The fastening structure according to claim 5, characterized in that: The connecting portion has a guiding groove, and the fastener has a convex column, and the convex column is inserted into the guiding groove before the external thread is connected with the internal thread.

7. The fastening structure according to claim 1, characterized in that: A cross section of the matching portion perpendicular to the direction is similar to a profile of the non-circular through hole.

8. The fastening structure according to claim 1, characterized in that: The non-circular through hole has straight sides.

9. The fastening structure according to claim 1, characterized in that: The non-circular through hole is a D-shaped hole.

10. An electronic device, characterized in that: include: A chassis, the chassis comprising the fastening structure according to any one of claims 1 to 9; as well as A circuit board is fixed in the chassis through the fastening structure.

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