Fixing assembly, radiator assembly and server

Abstract

The utility model relates to the technical field of radiators, in particular to a fixing assembly, a radiator assembly and a server. A fixing assembly is used for fixing a radiator to a circuit board so as to enable the radiator to be in thermal connection with the circuit board, the fixing assembly comprises a screw rod and an elastic piece, the screw rod is provided with a first threaded part and a second threaded part, the first threaded part is used for being in threaded connection with the circuit board, and the second threaded part is used for being in threaded connection with the radiator; the elastic piece is sleeved on the screw rod and is propped against the screw rod for limiting; when the first threaded part is in threaded connection with the circuit board and the second threaded part is in threaded connection with the radiator, the elastic piece abuts against the radiator in a pre-compression mode. According to the application, the second threaded part is arranged, so that the force applied by the elastic piece to the radiator is counteracted with the force generated at the threaded connection part of the second threaded part and the radiator, and the acting force between the radiator and the circuit board during pressing and limiting is relatively small.

Description

Technical Field

[0001] This application relates to the field of heat sink technology, and in particular to a fixing component, a heat sink assembly, and a server. Background Technology

[0002] In the design and manufacturing of modern electronic devices, with the continuous increase in chip integration and performance on circuit boards, the heat generated by the chips during operation increases dramatically. Therefore, it is usually necessary to install heat sinks on the circuit boards in thermal contact to dissipate the heat generated by the chips and maintain their operating temperature within a reasonable range.

[0003] Currently, existing heat sinks are usually fixed to the circuit board with screws and pushed by a pre-compressed spring to make thermal contact between the heat sink and the circuit board. During this process, the pre-compressed spring will generate a pushing force on the heat sink, resulting in a large force between the heat sink and the circuit board when they are pressed and limited. This can easily damage the circuit board and affect the normal operation of the chips on the circuit board. Utility Model Content

[0004] Therefore, it is necessary to provide a fixing component, a heat sink assembly, and a server that do not exert pressure on the heat sink.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0006] A fixing assembly for securing a heat sink to a circuit board to achieve a thermal connection between the heat sink and the circuit board, the fixing assembly comprising:

[0007] The screw has a first threaded portion and a second threaded portion, the first threaded portion being used to screw onto the circuit board, and the second threaded portion being used to screw onto the heat sink;

[0008] An elastic element is fitted onto the screw and abuts against and limits its movement on the screw.

[0009] When the first threaded portion is screwed onto the circuit board and the second threaded portion is screwed onto the heat sink, the elastic element abuts against the heat sink in a pre-compressed manner.

[0010] It is understandable that by screwing the first threaded part of the screw to the circuit board and the second threaded part to the heat sink, and by having the elastic element abut against the screw and the heat sink respectively in a pre-compressed manner, the connection and fixation between the heat sink and the circuit board are achieved. At the same time, the setting of the second threaded part makes the force applied by the elastic element to the heat sink cancel out the force generated at the screwed connection between the second threaded part and the heat sink, thereby reducing the force between the heat sink and the circuit board when they are pressed and limited.

[0011] In one embodiment, the first threaded portion is disposed independently relative to the second threaded portion;

[0012] The outer diameter of the screw at the location of the first threaded portion is smaller than the outer diameter of the screw at the location of the second threaded portion.

[0013] Understandably, by making the outer diameter of the first threaded portion of the screw smaller than the outer diameter of the second threaded portion, the first threaded portion can smoothly pass through the heat sink and be screwed onto the circuit board during installation.

[0014] In one embodiment, the fixing component further includes a limiting piece disposed between the first threaded portion and the second threaded portion and connected to the screw;

[0015] The limiting piece is used to abut against and limit the circuit board.

[0016] It is understandable that by setting a limit plate, the screw is stopped when it is screwed to the heat sink and circuit board. When the screw is screwed to the heat sink and circuit board and reaches the preset position, it cannot be screwed further, making the position of the completed assembly clearer.

[0017] In one embodiment, the limiting piece is configured as a gasket, which is connected to the screw in a snap-fit ​​manner.

[0018] Understandably, by configuring the limiting piece as a gasket and installing the gasket on the screw through a snap-fit ​​method, assembly becomes more convenient.

[0019] In one embodiment, the screw further has a screw head, which can abut against and limit the elastic element.

[0020] The screw head is used to cooperate with an external screwing tool.

[0021] In one embodiment, the elastic element is configured as a spring.

[0022] This application also provides the following technical solutions:

[0023] A heat sink assembly includes a heat sink and a fixing component in any of the above embodiments;

[0024] The screw passes through the radiator, and the second threaded portion is screwed to the radiator, while the elastic element abuts against and limits the radiator.

[0025] In one embodiment, the heat sink includes a heat sink body and a sleeve, one end of the sleeve abutting against the heat sink body, and the other end of the sleeve abutting against the circuit board;

[0026] The second threaded portion is screwed to the sleeve, and the elastic element abuts against and limits the radiator body.

[0027] In one embodiment, the fixing component is arranged at each corner of the heat sink.

[0028] This application also provides the following technical solutions:

[0029] A server includes a heat sink, a circuit board, and a fixing component as described in any of the above embodiments;

[0030] The heat sink can be fixed to the circuit board by the fixing component.

[0031] Compared with the prior art, by screwing the first threaded part of the screw to the circuit board and the second threaded part to the heat sink, and by having the elastic element abut against the screw and the heat sink respectively in a pre-compressed manner, the connection and fixation between the heat sink and the circuit board are achieved. At the same time, the setting of the second threaded part makes the force applied by the elastic element to the heat sink cancel out the force generated at the screwed connection between the second threaded part and the heat sink, thereby reducing the force between the heat sink and the circuit board when they are pressed and limited. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A schematic diagram of the fixed component structure provided in this application.

[0034] Figure 2 The main view of the fixed components provided in this application.

[0035] Figure 3 For this application Figure 2 Sectional view at point AA.

[0036] Figure 4 Exploded view of the fixing component provided in this application.

[0037] Figure 5 A schematic diagram of the heat sink assembly structure provided in this application.

[0038] The component labels are as follows:

[0039] 100. Fixing component; 10. Screw; 11. First threaded portion; 12. Second threaded portion; 13. Screw head; 131. Cross groove; 14. Groove; 15. Boss; 20. Elastic element; 30. Limiting piece;

[0040] 200. Radiator assembly; 210. Radiator; 211. Radiator body; 212. Sleeve; 213. Limiting ring; 214. Single-threaded screw;

[0041] 300. Server; 310. Circuit board. Detailed Implementation

[0042] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0043] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0047] Please see Figures 1 to 5 This application provides a fixing component 100 for fixing a heat sink 210 to a circuit board 310 so that the heat sink 210 and the circuit board 310 are thermally connected.

[0048] Specifically, the fixing assembly 100 includes a screw 10 and an elastic member 20. The screw 10 has a first threaded portion 11 and a second threaded portion 12. The first threaded portion 11 is used to screw onto the circuit board 310, and the second threaded portion 12 is used to screw onto the heat sink 210. The elastic member 20 is fitted onto the screw 10 and abuts against the screw 10 for limiting. When the first threaded portion 11 is screwed onto the circuit board 310 and the second threaded portion 12 is screwed onto the heat sink 210, the elastic member 20 abuts against the heat sink 210 in a pre-compressed manner.

[0049] As can be seen from the above, the screw 10 is screwed to the circuit board 310 via the first threaded portion 11 and to the heat sink 210 via the second threaded portion 12. The elastic element 20 is pre-compressed and abuts against the screw 10 and the heat sink 210 respectively. While securing the heat sink 210 to the circuit board 310, the second threaded portion 12 ensures that the force exerted by the elastic element 20 on the heat sink 210 is offset by the force generated at the screw joint between the second threaded portion 12 and the heat sink 210, thus reducing the force exerted between the heat sink 210 and the circuit board 310 during pressure limiting. Furthermore, during long-term operation of the electronic device, factors such as equipment vibration may cause the screw 10 to gradually loosen, altering the pressure exerted by the heat sink 210 on the chip and increasing the risk of chip damage. By setting the elastic element 20 to abut against the screw 10 and the heat sink 210 respectively in a pre-compressed manner, the screw 10 and the heat sink 210 can be made to move in opposite directions, thereby increasing the friction at the contact point between the second threaded part 12 and the heat sink 210, which can prevent the connection between the screw 10 and the heat sink 210 from becoming loose, and thus can avoid the heat sink 210 changing the pressure on the chip and damaging the chip.

[0050] Here, the pitch of the first threaded portion 11 and the second threaded portion 12 is the same.

[0051] like Figure 4 As shown, the first threaded portion 11 is independently provided relative to the second threaded portion 12; the outer diameter of the screw 10 at the location of the first threaded portion 11 is smaller than the outer diameter of the screw 10 at the location of the second threaded portion 12. This allows the first threaded portion 11 to pass smoothly through the connection point of the second threaded portion, thereby enabling the screw 10 to smoothly fix the heat sink 210 and the circuit board 310. Moreover, by making the outer diameter of the location of the first threaded portion 11 of the screw 10 smaller than the outer diameter of the location of the second threaded portion 12, the first threaded portion 11 can directly pass through the sleeve 212 during installation and then be screwed onto the circuit board 310, making the assembly of the screw 10 more convenient. It can be understood that in other embodiments, the outer diameter of the location of the first threaded portion 11 may also be equal to the outer diameter of the location of the second threaded portion 12.

[0052] In one embodiment, the screw 10 further has a screw head 13, which can abut and limit the elastic element 20; wherein, the screw head 13 is used to cooperate with an external tightening tool. Here, the screw head 13 may have grooves of the shape of a straight line, cross, etc., to cooperate with the external tightening tool.

[0053] In this embodiment, the screw head 13 has a cross groove 131 for cooperating with an external screwing tool to facilitate screwing.

[0054] like Figure 3 and Figure 4 As shown, a groove 14 is provided on the screw 10, which is used to accommodate the limiting piece 30.

[0055] In one embodiment, a boss 15 is provided inside the screw 10, and one end of the elastic member 20 abuts against the screw head 13, and the other end abuts against the boss 15 inside the screw, thereby compressing the elastic member 20.

[0056] Preferably, the elastic element 20 is configured as a spring.

[0057] In one embodiment, the fixing assembly 100 further includes a limiting piece 30, which is disposed between the first threaded portion 11 and the second threaded portion 12 and connected to the screw 10; wherein, the limiting piece 30 is used to abut against and limit the circuit board 310. By setting the limiting piece 30, it plays a limiting role when the screw 10 is screwed to the heat sink 210 and the circuit board 310, so that when multiple screws 10 fix the heat sink 210, their relative positions to the heat sink 210 and the circuit board 310 are the same, thus ensuring that each area of ​​the heat sink 210 maintains the same distance from the circuit board 310 after installation, thereby making the assembly of the heat sink 210 on the circuit board 310 more precise.

[0058] In this embodiment, the limiting piece 30 is configured as a gasket, and the gasket is connected to the screw 10 by a snap-fit ​​method. Here, the material of the gasket can be configured as metal, rubber, polyurethane, or other materials.

[0059] This application also provides the following technical solution: a radiator assembly 200, including a radiator 210 and a fixing component 100 in any of the above embodiments; a screw 10 is disposed through the radiator 210, and a second threaded portion 12 is screwed to the radiator 210, and an elastic member 20 abuts against and limits the radiator 210.

[0060] like Figure 5 As shown, the radiator 210 includes a radiator body 211 and a sleeve 212. One end of the sleeve 212 is attached to the radiator body 211, and the other end of the sleeve 212 is used to attach to the circuit board 310. The second threaded portion 12 is screwed to the sleeve 212, and the elastic element 20 abuts against and limits the radiator body 211. Here, the sleeve 212 and the radiator 210 can be connected by a fixed connection or by abutting for limiting.

[0061] In this embodiment, a limiting ring 213 is fitted on the sleeve 212. The sleeve abuts against the radiator 210 through the limiting ring 213 to limit the sleeve 212 to be fixed to the radiator 210.

[0062] In one embodiment, a fixing component 100 is arranged at each corner of the heat sink 210.

[0063] In this embodiment, a fixing component 100 is arranged at each of the four corners of the heat sink 210, and the middle position of the heat sink is fixed by four single-threaded screws 214 with springs.

[0064] This application also provides the following technical solution: a server 300, including a heat sink 210, a circuit board 310 and a fixing component 100 in any of the above embodiments; the heat sink 210 can be fixed to the circuit board 310 by the fixing component 100.

[0065] The process of installing the heat sink 210 on the circuit board 310 is as follows: The first threaded portion 11 of the fixing component 100 passes through the sleeve 212. By tightening the screw 10, the first threaded portion 11 is screwed onto the circuit board 310, and at the same time, the second threaded portion 12 is screwed onto the sleeve 212 of the heat sink 210. Tightening stops when a preset position is reached, thereby fixing the heat sink 210 onto the circuit board 310. The heat sink 210 can dissipate heat from the circuit board 310. At this time, the elastic element 20 abuts against the screw 10 and the heat sink 210 respectively in a pre-compressed manner to prevent the connection between the screw 10 and the heat sink 210 from loosening. A limiting piece 30 is provided to prevent the screw 10 from being over-tightened by limiting the screw 10.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A fixing assembly for fixing a heat sink (210) to a circuit board (310) to thermally connect the heat sink (210) with the circuit board (310), characterized in that, The fixing assembly (100) comprises: a screw rod (10) having a first threaded portion (11) for screwing with the circuit board (310) and a second threaded portion (12) for screwing with the heat sink (210); an elastic member (20) sleeved on the screw rod (10) and abutting against the screw rod (10) for limiting; when the first threaded portion (11) is screwed with the circuit board (310) and the second threaded portion (12) is screwed with the heat sink (210), the elastic member (20) is abutted against the heat sink (210) in a pre-compressed manner.

2. The fixture assembly of claim 1, wherein, The first threaded portion (11) is independently arranged relative to the second threaded portion (12); an outer diameter of the screw rod (10) at a position of the first threaded portion (11) is smaller than an outer diameter of the screw rod (10) at a position of the second threaded portion (12).

3. The fixture assembly of claim 2, wherein, The fixing assembly (100) further comprises a limiting sheet (30) arranged between the first threaded portion (11) and the second threaded portion (12) and connected with the screw rod (10); wherein the limiting sheet (30) is used for abutting against the circuit board (310) for limiting.

4. The fixture assembly of claim 3, wherein, The limiting sheet (30) is configured as a gasket which is connected with the screw rod (10) in a clamping manner.

5. The fixture assembly of claim 1, wherein, The screw rod (10) further has a screw rod head (13), and the screw rod (10) can abut against the elastic member (20) for limiting through the screw rod head (13); wherein the screw rod head (13) is used for cooperating with an external screwing tool.

6. The fixture assembly of claim 1, wherein, The elastic member (20) is configured as a spring.

7. A heat spreader assembly, comprising: The heat sink (210), the fixing assembly (100) according to any one of claims 1 to 6; The screw rod (10) is arranged through the heat sink (210), and the second threaded portion (12) is screwed with the heat sink (210), and the elastic member (20) abuts against the heat sink (210) for limiting.

8. The heat spreader assembly of claim 7, wherein, The heat sink (210) comprises a heat sink body (211) and a sleeve (212), one end of the sleeve (212) is abutted against the heat sink body (211), and the other end of the sleeve (212) is used for abutting against the circuit board (310); wherein the second threaded portion (12) is screwed with the sleeve (212), and the elastic member (20) abuts against the heat sink body (211) for limiting.

9. The heat spreader assembly of claim 7, wherein, The fixing assembly (100) is arranged at each corner position of the heat sink (210).

10. A server, characterized by The heat sink (210), the circuit board (310), and the fixing assembly (100) according to any one of claims 1 to 6; The heat sink (210) can be fixed to the circuit board (310) through the fixing assembly (100).

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