Fixing device and electronic device

Abstract

This application relates to the field of computer hardware installation technology, and provides a fixing device and electronic device, including: a first heat dissipation component, with a first end fixedly disposed on a circuit board and a second end provided with a first mounting portion; a connecting seat, fixedly disposed on the circuit board and penetrating through the first mounting portion, configured to fix the first mounting portion to the circuit board; a second heat dissipation component, with a first end connected to the first end of the first heat dissipation component and a second end provided with a second mounting portion; a locking member, including a locking member body and a threaded connection portion disposed on the first end of the locking member body, and a first pressure platform and a second pressure platform are also provided on the locking member body; wherein, in a first state, the threaded connection portion of the locking member is threadedly connected to the connecting seat, and the free end of the lower component to be fixed is pressed between the first pressure platform and the first mounting portion; in a second state, the free end of the upper component to be fixed is pressed between the first pressure platform and the second mounting portion, and the side of the second mounting portion away from the upper component to be fixed contacts the second pressure platform.

Description

Technical Field

[0001] This application relates to the field of computer hardware installation technology, and more particularly to a fixed device and electronic device. Background Technology

[0002] To reduce the footprint of expansion cards (such as solid-state drives) on the motherboard, these cards can be arranged in a stacked configuration to improve space utilization. For two-layer stacked expansion cards, screws are typically used to secure them to the motherboard; however, this method is inconvenient for installation and removal, and the screws are prone to being lost. Summary of the Invention

[0003] In view of this, this application provides a fixing device and electronic device that avoids the problems of inconvenience in disassembling and assembling expansion cards and easy loss of screws when using screw fastening to fix stacked expansion cards.

[0004] According to a first aspect of the present application, a fixing device is provided, suitable for fixing two layers of components stacked on a circuit board, comprising: a first heat dissipation assembly, with a first end fixedly disposed on the circuit board and a second end provided with a first mounting portion; a connecting seat, fixedly disposed on the circuit board and penetrating the first mounting portion, configured to fix the first mounting portion to the circuit board; a second heat dissipation assembly, with a first end connected to the first end of the first heat dissipation assembly and a second end provided with a second mounting portion; and a locking member, including a locking member body and a threaded connection portion disposed at the first end of the locking member body, the locking member body further comprising a first pressure platform and a second pressure platform; wherein the locking member has a first state of fixing the lower layer component to be fixed and a second state of fixing the upper layer component to be fixed, in the first state, the threaded connection portion is threadedly connected to the connecting seat, and the free end of the lower layer component to be fixed is pressed between the first pressure platform and the first mounting portion; in the second state, the free end of the upper layer component to be fixed is pressed between the first pressure platform and the second mounting portion, and the side of the second mounting portion away from the upper layer component to be fixed contacts the second pressure platform.

[0005] According to an embodiment of this application, a limiting bridge is provided at the end of the first mounting part. The limiting bridge has a protrusion facing the direction of the second heat dissipation component, and a limiting groove is provided at the highest point of the protrusion. A snap-fit ​​part protruding from the first pressing platform is provided, and the snap-fit ​​part is configured to snap into the limiting groove in a first state.

[0006] According to an embodiment of this application, the limiting bridge is an arched structure, with one end of the limiting bridge fixedly connected to the first mounting part and the other end suspended in the air.

[0007] According to an embodiment of this application, the first pressing platform includes a semi-cylindrical structure protruding from the locking member body, such that in both the first and second states, the first pressing platform can press against the free end of the lower member to be fixed.

[0008] According to an embodiment of this application, a rotating handle is provided at the second end of the locking member.

[0009] According to an embodiment of this application, a limiting arm is provided at the end of the second mounting part. The fixed end of the limiting arm is connected to the second mounting part, and the free end of the limiting arm is higher than the fixed end, so that in the second state, the free end of the limiting arm abuts against the rotating handle to prevent the rotating handle from rotating.

[0010] According to an embodiment of this application, the second pressure platform includes a quarter-cylindrical structure protruding from the locking member body, such that in a first state, the second pressure platform allows the limiting arm of the second heat dissipation assembly to be located in the gap position between the second pressure platform and the first pressure platform.

[0011] According to an embodiment of this application, the fixing device further includes: a first heat sink, wherein a recess is provided on the side of the first heat sink component facing the second heat sink component, and the first heat sink is disposed in the recess.

[0012] According to an embodiment of this application, the fixing device further includes: a second heat sink, wherein the second heat sink component has an upper recess on the side facing the first heat sink component, and the second heat sink is disposed in the upper recess.

[0013] According to a second aspect of the present application, an electronic device is provided, including: a circuit board, a connector, and a lower layer member to be fixed and an upper layer member to be fixed, which are adapted to electrically connect the stacked components; and the fixing device provided above.

[0014] In the fixing device of one or more embodiments described above, the first heat dissipation component, the connecting seat, the second heat dissipation component, and the locking member can cooperate with each other to lock and unlock two layers of components to be fixed. The locking member is provided with a threaded connection portion, a first pressure plate, and a second pressure plate. For the lower component to be fixed, during the process of threading the locking member to the connecting seat, the first pressure plate located on the lower layer can press the lower component to be fixed, thereby fixing the lower component. At this time, the locking member is in the first state. For the upper component to be fixed, by further rotating the locking member to the second state in the first state, the upper component to be fixed can be further fixed between the first pressure plate and the second pressure plate, based on the fixing of the lower component. Tool-free installation of the upper and lower components to be fixed can be achieved without screw fastening, overcoming the problems of inconvenience in disassembly and assembly and easy loss of screws that exist with screw fastening. Attached Figure Description

[0015] The above-mentioned contents, other objects, features and advantages of this application will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0016] Figure 1This schematic diagram illustrates a mounting device on a circuit board according to an embodiment of the present application.

[0017] Figure 2 for Figure 1 Exploded view;

[0018] Figure 3 The diagram schematically illustrates a perspective view of a locking member according to an embodiment of this application from one viewpoint;

[0019] Figure 4 A perspective view of a locking member according to an embodiment of this application is shown schematically from another angle;

[0020] Figure 5 A perspective view of a first heat dissipation assembly according to an embodiment of this application is schematically shown;

[0021] Figure 6 A perspective view of a second heat dissipation assembly according to an embodiment of this application is schematically shown;

[0022] Figure 7 An enlarged view of the second heat dissipation assembly at the second mounting portion according to an embodiment of this application is shown schematically;

[0023] Figure 8 The schematic diagram illustrates a fixing device in a first installation state according to an embodiment of this application;

[0024] Figure 9 A schematic diagram of the fixing device according to an embodiment of this application in a second installation state is shown;

[0025] Figure 10 A schematic diagram illustrating the fixing device according to an embodiment of this application in a third installation state is shown.

[0026] Figure 11 A schematic diagram illustrating the fixing device according to an embodiment of this application in a fourth installation state is shown.

[0027] Figure 12 This schematically illustrates a fixing device according to an embodiment of the present application in a fifth installation state;

[0028] Figure 13 The schematic diagram illustrates the fixing device according to an embodiment of this application in a sixth installation state;

[0029] Figure 14 for Figure 13 Enlarged view of the central locking component;

[0030] Figure 15 The schematic diagram illustrates the fixing device according to an embodiment of the present application at the second pressure platform in the sixth installation state.

[0031] Among them, 1. Fixing device; 11. First heat dissipation assembly; 111. First mounting part; 1111. Limiting bridge; 1112. Limiting groove; 112. Recessed part; 113. First connecting part; 114. Second connecting part; 12. Connecting seat; 13. Second heat dissipation assembly; 131. Second mounting part; 1311. Limiting arm; 132. Upper recessed part; 133. Third connecting part; 14. Locking member; 141. Locking member body; 1411. First pressure table; 1412. Second pressure table; 1413. Snap-fit ​​part; 142. Threaded connection part; 143. Rotating handle; 15. First heat sink; 16. Second heat sink; 2. Circuit board; 21. First fixing hole; 22. Second fixing hole; 3. Connector; 41. Lower layer to be fixed part; 42. Upper layer to be fixed part.

[0032] It should be noted that, for clarity, the dimensions of the whole, part of the structure, or the whole or part of the region in the drawings used to describe the embodiments of this application may be enlarged or reduced, that is, these drawings are not drawn to actual scale. Detailed Implementation

[0033] The embodiments of this application will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of this application. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of this application for ease of explanation. However, it will be apparent that one or more embodiments may be implemented without these specific details. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this application.

[0034] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The terms “comprising,” “including,” etc., as used herein indicate the presence of features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0035] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0036] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0037] It should be noted that in the description of the embodiments of this application, the terms "upper", "lower", "left", "right", "one side", "the other side", "one end", "the other end", "side", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure referred to has a specific orientation, or is constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "connection," "direct connection," "indirect connection," "fixed connection," "installation," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. The terms "installation," "connection," and "fixed connection" can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] With the increasing demand for lightweight and miniaturized personal computer (PC) products, motherboards need to be designed to be as small as possible, thus requiring improved space utilization. Taking a solid-state drive (SSD) on a desktop computer motherboard as an example, a certain model of desktop computer motherboard requires two SSDs. However, placing each SSD and its corresponding heatsink parallel to each other on the motherboard occupies a significant amount of space, posing a major challenge to the placement and routing of other electronic components on the motherboard.

[0040] To reduce the footprint of expansion cards (such as solid-state drives) on the motherboard, these cards can be arranged in a stacked configuration to improve space utilization. For two-layer stacked expansion cards, screws are typically used to secure them to the motherboard. However, this method has several drawbacks. First, screws are required for installation and removal, posing a risk of damage to motherboard components and making the process cumbersome and time-consuming. Second, there are issues with missing expansion cards and lost screws during motherboard manufacturing.

[0041] Based on this, in the embodiments of this application, a fixing device is provided that can fix two stacked components without tools, so as to avoid the problems of inconvenience in disassembly and assembly and easy loss of screws that exist when fixing the stacked expansion card by screw fastening.

[0042] Figure 1 This schematic diagram illustrates the structure of the fixing device assembled on the circuit board according to an embodiment of the present application. Figure 2 for Figure 1 Explosion diagram, Figure 3 The schematic illustration shows a perspective view of a locking member according to an embodiment of this application from one viewpoint. Figure 4 The diagram schematically illustrates a perspective view of a locking member according to an embodiment of this application from another viewpoint. Figure 5 A perspective view of a first heat dissipation assembly according to an embodiment of this application is schematically shown. Figure 6 A perspective view of a second heat dissipation assembly according to an embodiment of this application is schematically shown. See also Figures 1-6 In the embodiments of this application, the fixing device includes: a first heat dissipation assembly 11, with a first end fixedly disposed on the circuit board 2 and a second end provided with a first mounting portion 111; a connecting seat 12, fixedly disposed on the circuit board 2 and passing through the first mounting portion 111, configured to fix the first mounting portion 111 to the circuit board 2; a second heat dissipation assembly 13, with a first end connected to the first end of the first heat dissipation assembly 11 and a second mounting portion 131 provided at the second end; and a locking member 14, including a locking member body 141 and a threaded connection portion 142 disposed on the first end of the locking member body, the locking member body 141 also being provided with... The device includes a first pressure platform 1411 and a second pressure platform 1412. The locking member 14 has a first state of fixing a lower layer member 41 to be fixed and a second state of fixing an upper layer member 42 to be fixed. In the first state, the threaded connection part 142 is threadedly connected to the connecting seat 12, and the free end of the lower layer member 41 to be fixed is pressed between the first pressure platform 1411 and the first mounting part 111. In the second state, the free end of the upper layer member 42 to be fixed is pressed between the first pressure platform 1411 and the second mounting part 131, and the side of the second mounting part 131 facing away from the upper layer member 42 is in contact with the second pressure platform 1412.

[0043] In the embodiments of this application, the first heat dissipation component, the connecting seat, the second heat dissipation component, and the locking member can cooperate with each other to lock and unlock the two layers of components to be fixed. The locking member is provided with a threaded connection part, a first pressure plate, and a second pressure plate. For the lower component to be fixed, during the process of threading the locking member to the connecting seat, the first pressure plate located on the lower layer can press the lower component to be fixed, thereby fixing the lower component to be fixed. At this time, the locking member is in the first state. For the upper component to be fixed, by further rotating the locking member to the second state in the first state, the upper component to be fixed can be further fixed between the first pressure plate and the second pressure plate on the basis of fixing the lower component to be fixed. Tool-free installation of the upper and lower components to be fixed can be achieved without screw fastening, overcoming the problems of inconvenience in disassembly and assembly and easy loss of screws that exist with screw fastening.

[0044] In the embodiments of this application, the component to be fixed can be an expansion card stacked on the motherboard, such as a solid-state drive or memory module. The distinction between upper and lower layers of the component to be fixed is merely for ease of describing its position and does not limit its structure or function. Here, the lower layer refers to the component closer to the circuit board among two stacked components, and the upper layer refers to the component farther from the circuit board among two stacked components. Furthermore, to meet the heat dissipation requirements of the expansion card and ensure its long-term operational stability, each component to be fixed can be attached to a heatsink while fixing both the upper and lower layers.

[0045] In the embodiments of this application, the fixing end of the component to be fixed can be connected to the connector 3 on the circuit board. The connector can be provided with a second interface that matches the first interface of the component to be fixed. The end of the component to be fixed with the first interface is inserted into the end of the connector with the second interface. The end of the component to be fixed that does not mate with the connector is called the free end of the component to be fixed. The free end can be fixed by a fixing device to fix the expansion card to the circuit board.

[0046] The first heat dissipation component has a plate-like structure and can be made of metal or other non-metallic materials that meet thermal conductivity requirements. Furthermore, the first heat dissipation component can work in conjunction with a first heat sink 15 to dissipate heat from the underlying component to be fixed. The first heat sink can be a non-metallic thermally conductive material such as a thermally conductive silicone pad or a graphite thermally conductive pad, and is filled between the first heat dissipation component and the underlying component to be fixed. In the embodiments of this application, the fixing device includes a first heat sink 15, and a recess 112 is provided on the side of the first heat dissipation component 11 facing the second heat dissipation component 13, with the first heat sink 15 disposed in the recess 112.

[0047] The recessed portion can be formed by recessing a structural part or the entire first end of the first heat dissipation component in a direction away from where the first heat sink is disposed, so that the first heat sink can be disposed in the recessed portion. In the embodiments of this application, the first heat dissipation component can be made of metal and includes a recessed portion 112 and a first mounting portion 111 connected to each other. The recessed portion 112 and the first mounting portion 111 can be formed by bending a whole sheet of metal. The first heat sink 15 can be attached to the recessed portion 112, and when the first heat sink is attached to the recessed portion, the side of the first heat sink away from the recessed portion is flush with the first mounting portion, so that after the lower layer to be fixed is installed, the first heat sink can be attached to the lower layer to be fixed to meet the heat dissipation requirements of the lower layer to be fixed.

[0048] In the embodiments of this application, a limiting bridge 1111 is provided at the end of the first mounting part 111. The limiting bridge 1111 has a protrusion facing the direction of the second heat dissipation component, and a limiting groove 1112 is provided at the highest point of the protrusion. A snap-fit ​​part 1413 protruding from the first pressing platform 1411 is provided on the first pressing platform 1411. The snap-fit ​​part 1413 is configured to snap into the limiting groove 1112 in the first state.

[0049] In the embodiments of this application, the limiting bridge is used to limit the locking member in the first state and engage the locking part of the locking member. On the one hand, it can indicate the installation of the upper layer to be fixed and the second heat dissipation component in this state. On the other hand, it can prevent the locking member from being accidentally touched and causing the locking member to rotate when installing the upper layer to be fixed and the second heat dissipation component, thereby improving the operational convenience of fixing the lower layer to be fixed and the upper layer to be fixed by the fixing device.

[0050] In the embodiments of this application, the limiting bridge is an arched structure, with one end of the limiting bridge fixedly connected to the first mounting part and the other end suspended in the air.

[0051] In the embodiments of this application, the limiting bridge is constructed as an arched structure, with one end fixed and the other end suspended, thereby enabling small-amplitude elastic deformation. During the deformation process, the limiting bridge can deform through the relative movement between the suspended end and the first mounting part. On the one hand, this satisfies the limiting requirements and improves the snap-fit ​​strength of the snap-fit ​​part. On the other hand, it facilitates the further screwing of the locking member into the connecting seat when the snap-fit ​​part is snapped into the limiting groove, thereby further changing the locking member from the first state to the second state and realizing the fixation of the upper-layer member to be fixed.

[0052] In the embodiments of this application, a first fixing hole 21 may be formed on the circuit board 2. The first fixing hole 21 is a through hole and is configured to accommodate the first end of the connector 12, so that the first end of the connector 12 can be fixedly disposed on the circuit board.

[0053] In an embodiment of this application, the first mounting portion is provided with a mounting hole to allow the connecting seat 12 to pass through. The mounting hole is formed by an inward recess in the first mounting portion away from the side connected to the recessed portion. A limiting bridge is provided at the edge of the mounting hole located on the side of the first mounting portion away from the side connected to the recessed portion to avoid limiting the locking member when it is not in the first state.

[0054] In an embodiment of this application, a first connecting portion 113 is provided on the side of the first end of the first heat dissipation component facing away from the circuit board. A limiting slot is provided on the first connecting portion 113 for engaging the second heat dissipation component, so that the second heat dissipation component can be engaged with the first end of the first heat dissipation component by cooperating with the limiting slot.

[0055] In an embodiment of this application, a second connecting portion 114 is provided on the side of the first end of the first heat dissipation component facing the circuit board. The first end of the second connecting portion is connected to the first heat dissipation component, and the second end is used to connect to the circuit board.

[0056] A second fixing hole 22 can be provided on the circuit board. The number of the second fixing holes 22 is equal to the number of the second connecting parts 114 and their positions correspond, so that the second connecting parts 114 can pass through the second fixing holes 22 and fix the first heat dissipation component 11 to the circuit board through the second fixing holes 22. In the embodiments of this application, the first end and the second end of the second connecting part 114 are bent to form a bent structure, which can be obtained by bending a piece of metal or non-metal material to improve the firmness of the second connecting part in the second fixing hole.

[0057] In the embodiments of this application, the locking body 141 is generally cylindrical, with a threaded connection portion 142 at the first end for threaded connection with the connecting seat 12; and a rotating handle 143 at the second end for manual rotation to lock or unlock the two layers of components to be fixed. A first pressure plate 1411 and a second pressure plate 1412 are provided on the outer periphery of the locking body.

[0058] In embodiments of this application, the second end of the connector 12 can pass through the mounting hole of the first mounting portion and be fixedly connected to the first mounting portion through the mounting hole. In some embodiments, the mounting hole and the connector can be configured to have an interference fit so that the connector can fix the first mounting portion to the circuit board. With the second connector 114, both ends of the first heat dissipation assembly can be fixed to the circuit board.

[0059] See Figure 3 , Figure 4 In the embodiments of this application, the first pressing platform 1411 includes a semi-cylindrical structure protruding from the locking member body, so that in both the first state and the second state, the first pressing platform can press against the free end of the lower member to be fixed.

[0060] In the embodiments of this application, the first pressing platform protrudes entirely from the locking member body to facilitate pressing the lower member to be fixed. To maintain the pressing state on the lower member during the rotation of the locking member, the first pressing platform can surround and cover a certain range of the outer periphery of the locking member body, for example, around half of the outer periphery of the locking member body. In this case, the first pressing platform is a semi-cylindrical structure, which allows for rotation of the locking member within 180°. In the embodiments of this application, during the transition from the first state to the second state, the locking member needs to rotate a certain angle around its own axis. During this process, the first pressing platform can maintain the pressing state on the lower member to be fixed, preventing the lower member from falling off.

[0061] In the embodiments of this application, the snap-fit ​​portion 1413 is disposed on the edge of the first pressure table 1411 and protrudes from the first pressure table. In the first state, the snap-fit ​​portion is snapped into the limiting groove of the limiting bridge. After rotating the locking member by a certain angle, it can be changed from the first state to the second state. At this time, the snap-fit ​​portion disengages from the limiting groove, does not restrict the rotation of the locking member, and the first pressure table can continuously press the lower layer to be fixed, ensuring the fixing strength of the lower layer to be fixed. At the same time, the second pressure table can also fix the upper layer to be fixed, thereby realizing the simultaneous fixing of the upper layer to be fixed and the lower layer to be fixed.

[0062] In the embodiments of this application, a rotating handle 143 is provided at the second end of the locking member 14. The rotating handle can be plate-shaped or cross-shaped, so that the user can rotate the locking member by rotating the rotating handle to tighten or release the upper and / or lower components to be fixed. The embodiments of this application do not limit the shape of the rotating handle.

[0063] Figure 7 An enlarged view schematically illustrating the second heat dissipation assembly according to an embodiment of this application at the second mounting portion 131 is shown. Figure 4 , Figure 7 As shown in the embodiment of this application, a limiting arm 1311 is provided at the end of the second mounting part. The fixed end of the limiting arm 1311 is connected to the second mounting part, and the free end of the limiting arm is higher than the fixed end, so that in the second state, the free end of the limiting arm abuts against the rotating handle to prevent the rotating handle from rotating.

[0064] It should be noted that, in the embodiments of this application, the free end of the limiting arm is higher than the fixed end, meaning that... Figure 7 In the indicated orientation, the free end is positioned above the fixed end, meaning the free end is farther from the first heat dissipation component than the fixed end. The connection between the fixed end and the second mounting portion can be partial. For example, the area of ​​the fixed end facing the second mounting portion that is farther from the first heat dissipation component can be connected to the second mounting portion, while the area closer to the first heat dissipation component remains unconnected, thus creating an approximately elastic connection between the limiting arm and the second mounting portion. During the transition from the first to the second state of the locking member, the second pressure plate presses against the free end of the limiting arm. When the locking member is in the second state, the second pressure plate does not press against the limiting arm, allowing the free end of the limiting arm to tilt upwards and abut against the rotating handle to prevent rotation and avoid loosening of the fixing device on the upper and lower components to be fixed.

[0065] In the embodiments of this application, the first end of the second heat dissipation component 13 is provided with a third connecting portion 133. The third connecting portion has a protruding locking block that can be engaged with the limiting slot of the first connecting portion 113 to achieve relative fixation between the second heat dissipation component and the first heat dissipation component. The depth of the limiting slot of the first connecting portion 113 can be slightly larger than the size of the locking block of the third connecting portion, so that when the third connecting portion is engaged with the first connecting portion, it can rotate relative to the first connecting portion within a certain angle range around the position where the locking block and the limiting slot mate, thereby facilitating the installation of the second heat dissipation component.

[0066] See Figure 4 In an embodiment of this application, the second pressure platform 1412 includes a quarter-cylindrical structure protruding from the locking member body, such that in a first state, the second pressure platform allows the limiting arm of the second heat dissipation assembly to be located in the gap position between the second pressure platform and the first pressure platform.

[0067] The second pressure plate protrudes from the locking member body to facilitate pressing the upper component to be fixed. To facilitate fixing the upper component while pressing the lower component, the second pressure plate can cover a certain area of ​​the outer periphery of the locking member body, and the projection of the second pressure plate onto the plane containing the lower surface of the first pressure plate at least partially coincides with the lower surface of the first pressure plate. For example, in an embodiment of this application, the second pressure plate can be set to surround one-quarter of the outer periphery of the locking member body. In this case, the first pressure plate is a quarter-cylindrical structure, and the projection of the second pressure plate onto the plane containing the lower surface of the first pressure plate covers half of the lower surface of the first pressure plate.

[0068] In the embodiments of this application, the fixing device further includes a second heat sink 16, and the second heat sink is provided with an upper recess 132 on the side of the second heat sink component facing the first heat sink component, and the second heat sink is disposed in the upper recess.

[0069] It should be noted that, in the embodiments of this application, the terms "upper" and "lower" in "upper recess" and "lower recess" are used interchangeably. Figure 2 The direction shown is used as an example for illustration only, and is not necessarily used to distinguish between two structures. It does not necessarily indicate the orientation of the structural depression.

[0070] The upper recess can be formed by recessing a portion or the entire structure at the first end of the second heat dissipation component in a direction away from where the second heat sink is located, so that the second heat sink can be disposed in the upper recess. In the embodiments of this application, the second heat dissipation component can be made of metal and includes an upper recess 132 and a second mounting portion 131 connected to each other. The upper recess 132 and the second mounting portion 131 can be formed by bending a single piece of metal sheet. The second heat sink 16 can be attached to the upper recess 132, and when the second heat sink is attached to the upper recess, the side of the second heat sink away from the upper recess is flush with the second mounting portion, so that after the upper component to be fixed is installed, the second heat sink can be attached to the upper component to be fixed, thereby meeting the heat dissipation requirements of the upper component to be fixed.

[0071] To ensure that the threaded connection of the locking member is fully screwed into the connecting seat and the first pressure plate completely fixes the lower layer to be fixed, the second pressure plate can press the second heat dissipation component to fix the upper layer to be fixed. The length and pitch of the threaded connection can be designed to match. For example, in the embodiment of this application, during the process of the locking member changing from the first state to the second state, the locking member rotates a quarter turn relative to the connecting seat. Therefore, the length of the threaded connection of the locking member can be configured such that, in the first state, the gap between the first pressure plate, the lower layer to be fixed, and the first heat dissipation component is a quarter pitch, so that after the locking member rotates a quarter turn and changes from the first state to the second state, the first pressure plate just presses the lower layer to be fixed.

[0072] Figure 8 This schematic diagram illustrates a fixing device according to an embodiment of the present application in a first installation state. Figure 9 This schematic diagram illustrates a fixing device according to an embodiment of the present application in a second installation state. Figure 10 The diagram schematically illustrates the fixing device according to an embodiment of this application in a third installation state. Figure 11 The diagram schematically illustrates the fixing device according to an embodiment of this application in a fourth installation state. Figure 12 The diagram schematically illustrates the fixing device according to an embodiment of this application in a fifth installation state. Figure 13 The diagram schematically illustrates the fixing device according to an embodiment of this application in a sixth installation state. Figure 14 for Figure 13 Enlarged view of the locking mechanism. Figure 15 A schematic diagram of the fixing device according to an embodiment of this application at the second pressure platform in a sixth installation state is shown. Figures 8-15 As shown, the fixing device according to the embodiment of this application fixes the lower and upper components to be fixed in the following ways.

[0073] Connector 3, connector 12, and first heat dissipation component 11 are pre-installed on the circuit board, and the first heat sink is pre-installed in the recess of the first heat dissipation component. First, the end of the lower component to be fixed 41 with the first interface is inserted into the connector. Since the free end of the lower component to be fixed is not limited, there may be a slight upward tilt, such as... Figure 8 As shown; then as Figure 9 As shown, install the locking member 14 by screwing the threaded connection of the locking member into the connecting seat. During the screwing process, the lower side of the first pressure platform, i.e., the side facing the first heat dissipation assembly, remains in contact with the lower part to be fixed, causing the first pressure platform to gradually press down the lower part to be fixed until the locking part at the first pressure platform engages with the limiting groove of the limiting bridge. Figure 10 As shown. Further, the end of the upper component to be fixed, having the first interface, is inserted into the connector to secure the upper component using a locking mechanism, as shown. Figure 11 As shown. After installing the upper-layer fixing component, install the second heat dissipation assembly with the second heat sink. Secure the third connecting part of the second heat dissipation assembly to the first connecting part of the first heat dissipation assembly, and manually press down the limiting arm of the second heat dissipation assembly until the end of the limiting arm is flush with the lower surface of the second pressure table. Figure 12 As shown. The locking component is rotated 90° counterclockwise until it reaches the second state. During this rotation, the first pressure plate continuously presses against the lower component to be fixed, while the second pressure plate presses against the second heat dissipation assembly and the limiting arm. (See diagram.) Figure 13 , Figure 14 , Figure 15 As shown, after rotating the locking member, the locking member is in the second state. At this time, the first pressing platform presses the lower layer of the component to be fixed, and the second pressing platform 1412 presses the second heat dissipation component, but does not press the limiting arm. The end of the limiting arm 1311 is raised upward and abuts against the side wall of the rotating handle 143, preventing the rotating handle from rotating back, thereby limiting the locking member and completing the fixing of the lower layer and the upper layer of the component to be fixed.

[0074] To unlock, simply press down the limit arm manually and then rotate the locking component to unlock both the upper and lower components to be fixed.

[0075] According to the fixing device provided in the embodiments of this application, during the replacement or disassembly of the upper and lower components to be fixed, it is only necessary to manually rotate the locking member to release the fixing of the upper and lower components to be fixed, without the need for additional tools or complicated operations, making disassembly and assembly convenient. The limiting bridge of the first heat dissipation component and the limiting arm of the second heat dissipation component effectively prevent loosening and detachment under conditions such as vibration, improving the firmness of the fixing of the upper and / or lower components to be fixed.

[0076] In some embodiments, an electronic device is further provided, such as Figure 1 As shown, it includes: a circuit board 2, a connector 3, and the aforementioned fixing device 1. The connector is disposed on the circuit board and is suitable for electrically connecting the lower and upper layers of the stacked components to be fixed. The fixing device is disposed on the circuit board and is used to fix the lower and upper layers of the stacked components to be fixed.

[0077] Those skilled in the art will understand that the features described in the various embodiments of this application can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in this application. In particular, the features described in the various embodiments of this application can be combined and / or combined in various ways without departing from the spirit and teachings of this application. All such combinations and / or combinations fall within the scope of this application.

Claims

1. A fixing device, suitable for fixing two layers of components stacked on a circuit board, characterized in that, include: The first heat dissipation component has a first end fixedly disposed on the circuit board and a second end provided with a first mounting part; A connector is fixedly disposed on the circuit board and extends through the first mounting portion, and is configured to fix the first mounting portion to the circuit board; The second heat dissipation component has a first end connected to the first end of the first heat dissipation component, and a second mounting part provided at the second end. The locking member includes a locking member body and a threaded connection portion disposed at a first end of the locking member body. The locking member body is also provided with a first pressure plate and a second pressure plate. The locking member has a first state of fixing a lower part to be fixed and a second state of fixing an upper part to be fixed. In the first state, the threaded connection is threaded to the connecting seat, and the free end of the lower part to be fixed is pressed between the first pressing platform and the first mounting part. In the second state, the free end of the upper part to be fixed is pressed between the first pressing platform and the second mounting part, and the side of the second mounting part away from the upper part to be fixed is in contact with the second pressing platform.

2. The fixing device according to claim 1, characterized in that, The end of the first mounting part is provided with a limiting bridge, the limiting bridge having a protrusion facing the direction of the second heat dissipation component, and a limiting groove is provided at the highest point of the protrusion; The first pressing platform is provided with a snap-fit ​​part protruding from the first pressing platform, and the snap-fit ​​part is configured to snap into the limiting groove in the first state.

3. The fixing device according to claim 2, characterized in that, The limiting bridge has an arched structure, with one end fixedly connected to the first mounting part and the other end suspended in the air.

4. The fixing device according to claim 1, characterized in that, The first pressing platform includes a semi-cylindrical structure protruding from the locking member body, such that in both the first state and the second state, the first pressing platform can press against the free end of the lower member to be fixed.

5. The fixing device according to claim 1, characterized in that, The second end of the locking member is provided with a rotating handle.

6. The fixing device according to claim 5, characterized in that, The end of the second mounting part is provided with a limiting arm. The fixed end of the limiting arm is connected to the second mounting part, and the free end of the limiting arm is higher than the fixed end, so that in the second state, the free end of the limiting arm abuts against the rotating handle to prevent the rotating handle from rotating.

7. The fixing device according to claim 6, characterized in that, The second pressure plate includes a quarter-cylindrical structure protruding from the locking member body, such that in the first state, the second pressure plate allows the limiting arm of the second heat dissipation assembly to be located in the gap position between the second pressure plate and the first pressure plate.

8. The fixing device according to claim 1, characterized in that, Also includes: The first heat sink has a recessed portion on the side of the first heat dissipation component facing the second heat dissipation component, and the first heat sink is disposed in the recessed portion.

9. The fixing device according to claim 1, characterized in that, Also includes: The second heat sink has an upper recess on the side of the second heat sink component facing the first heat sink component, and the second heat sink is disposed in the upper recess.

10. An electronic device, characterized in that, include: circuit board Connectors suitable for electrically connecting lower and upper components to be secured in a stacked configuration; The fixing device according to any one of claims 1 to 9.

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