Lifting device for heat dissipation plate, heat dissipation device and server

Abstract

The utility model provides a lifting device for a heat dissipation plate, a heat dissipation device and a server. The lifting device comprises a pair of fixing seats used for fixing the heat dissipation plate; a pair of arm parts are formed at the two ends of the lifting main body, the tail end of each arm part is hinged to the side wall of the corresponding fixed seat, and a sliding groove is formed in each arm part; and the pair of locking devices is used for removably locking the arm part at the preset position on the fixed seat. A section of arc-shaped outer edge is formed on the side wall of each fixed seat, and a locking groove is formed in the arc-shaped outer edge and / or the outer side of the end part of the arc-shaped outer edge; each locking device comprises a spring and a sliding block, the spring exerts force towards the hinge point on the sliding block, a first part of the sliding block is arranged in the sliding groove of the arm part and can slide in the longitudinal direction of the arm part, and a second part of the sliding block protrudes out of the sliding groove and can abut against the arc-shaped outer edge and be clamped into the locking groove under the action of the force of the spring. And an unlocking structure is connected or formed on the second part of the sliding block.

Description

Technical Field

[0001] This disclosure relates to the fields of heat dissipation and computer technology, and in particular to a lifting device for a heat sink, a heat dissipation device, and a server. Background Technology

[0002] In recent years, with the increase in CPU (Central Processing Unit) frequency, core count, and manufacturing process technology, CPU power consumption has increased year by year. Traditional air cooling systems have limited heat dissipation capacity when handling high CPU loads. As a result, the liquid-cooled server market has gradually grown. Liquid-cooled servers utilize liquid cooling systems to reduce the operating temperature of the CPU in the server. The liquid cooling system directly absorbs and removes heat from the CPU through fluid channels flowing through the heatsinks in contact with the CPU, effectively reducing the CPU operating temperature. For 2U and larger (4U / 6U / 8U) dual-node CPU liquid-cooled servers, at least one pair of CPUs are installed on the server motherboard, and each CPU surface is equipped with a CPU heatsink. The circulation pipeline of the liquid cooling medium can be connected to both CPU heatsinks simultaneously.

[0003] With the rapid growth of the liquid-cooled server market, server manufacturers and server room operators are facing a surge in the production and maintenance of liquid-cooled components. The biggest problem when installing and removing CPU heatsinks is that at least two people are required: one to hold both heatsinks while the other installs and manages the piping. This significantly reduces production and field maintenance efficiency. Although lifting devices have been developed to lift both heatsinks at once, issues remain such as the inability or difficulty in locking the position, and inconvenient operation. Utility Model Content

[0004] In view of the above problems, this disclosure provides a lifting device for a heat sink, a heat dissipation device, and a server.

[0005] In a first aspect, this disclosure provides a lifting device for a heat sink, the lifting device comprising:

[0006] A pair of mounting brackets, used to fix a pair of heat sinks respectively;

[0007] The carrying body has two ends forming a pair of opposing arms, the end of each arm being hinged to a hinge point on the side wall of a corresponding fixed base; and

[0008] A pair of locking devices are provided for cooperating with the pair of arms and the pair of fixing seats to releasably lock the pair of arms of the lifting body, which is in a predetermined position, onto the pair of fixing seats, wherein...

[0009] Each fixed seat has a side wall with an arc-shaped outer edge around the corresponding hinge point, and a locking groove corresponding to the predetermined position is formed on the arc-shaped outer edge and / or on the outer side of the end of the arc-shaped outer edge.

[0010] Each arm has a groove extending longitudinally along the arm;

[0011] Each locking device includes a spring and a slider. One end of the spring is connected to a corresponding arm, and the other end contacts the slider to apply a force toward the hinge point. A first portion of the slider is positioned within a groove in the arm and configured to slide longitudinally along the arm. A second portion of the slider protrudes from the groove and is configured to abut against the arcuate outer edge and engage with the locking groove under the force of the spring. An unlocking mechanism is attached to or formed on the second portion of the slider, the unlocking mechanism being configured to be operated by a user to apply an external force to the slider against the force of the spring.

[0012] Secondly, this disclosure provides a heat dissipation device, the heat dissipation device comprising:

[0013] The lifting device according to the first aspect of this disclosure; and

[0014] A pair of heat sinks, the pair of heat sinks being spaced a certain distance apart, and the top surfaces of the pair of heat sinks being fixed to the bottom surfaces of the pair of mounting bases respectively.

[0015] Thirdly, this disclosure provides a server, the server comprising:

[0016] The heat dissipation device according to the second aspect of this disclosure; and

[0017] At least two CPU chips, of which,

[0018] The pair of heat sinks are respectively installed on two of the at least two CPU chips to dissipate heat from the two CPU chips.

[0019] The lifting device for heat sinks disclosed herein allows a user to lift two heat sinks at once by means of a lifting body hinged to a fixed base. The user can also perform other operations with the other hand while holding the heat sink with one hand. With the help of a specially designed locking device and the side wall structure of the fixed base, the user can easily lock the lifting body in and unlock it from a predetermined position. The locking of the lifting body is reliable and will not be unlocked due to accidental contact, which greatly improves the efficiency of production and field maintenance. Attached Figure Description

[0020] In the accompanying drawings of the embodiments disclosed herein:

[0021] Figure 1 This is a schematic diagram of the heat dissipation layout for a standard 2U dual-node server.

[0022] Figure 2 This is an exploded view of the lifting device according to an embodiment of the present disclosure;

[0023] Figure 3 This is an assembly diagram of the lifting device according to an embodiment of the present disclosure, wherein the unlocking structure is lifted;

[0024] Figure 4 This is a partially enlarged schematic diagram of the lifting device according to an embodiment of the present disclosure;

[0025] Figure 5 This is a schematic diagram formed by superimposing views of the lifting device according to an embodiment of the present disclosure when the lifting body is in different positions.

[0026] Figure 6 and Figure 7 This is a schematic diagram of a heat dissipation device according to an embodiment of the present disclosure, wherein, in Figure 6 In the middle, the main body of the handle is in the folded position. Figure 7 In the middle, the main body of the handle is in the open position.

[0027] In this embodiment of the disclosure, the reference numerals have the following meanings:

[0028] 1: Lifting device; 10: Fixing base; 11: Side wall; 12: Hinge point; 13: Arc-shaped outer edge; 141, 142: Locking groove; 15: Base plate; 16: End wall; 17: Connecting bolt; 18: Connecting hole; 19: Countersunk screw; 20: Lifting body; 21: Arm; 211: Arm end; 212: Slide groove; 22: Crossbar; 30: Locking device; 31: Spring; 311, 312: Spring ends; 32: Slider; 321: First part of slider; 322: Second part of slider; 33: Hook handle; 332: Rib plate; 34: Cover plate; 341: Opening; 342: Small countersunk screw; 4: Heat sink; 5, 51, 52, 53: Liquid cooling pipes; 6: Fluid connector; 7: Server motherboard. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of this disclosure, the tube-insertion assembly provided in the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0030] The present disclosure will be described more fully below with reference to the accompanying drawings; however, the embodiments shown may be embodied in different forms, and the present disclosure should not be construed as limited to the embodiments set forth below. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of the disclosure.

[0031] The accompanying drawings of the embodiments disclosed herein are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the detailed embodiments to explain this disclosure and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the description of the detailed embodiments with reference to the accompanying drawings.

[0032] This disclosure may be described with reference to plan and / or cross-sectional views using the ideal schematic diagrams of this disclosure. Therefore, the example illustrations may be modified according to manufacturing techniques and / or tolerances.

[0033] Where there is no conflict, the various embodiments of this disclosure and the features thereof in the embodiments may be combined with each other.

[0034] The terminology used in this disclosure is for describing particular embodiments only and is not intended to limit the disclosure. The term "and / or" as used in this disclosure includes any and all combinations of one or more of the associated enumerated entries. The singular forms "a" and "the" as used in this disclosure are also intended to include the plural forms unless the context clearly indicates otherwise. The terms "comprising," "made of," etc., as used in this disclosure specify the presence of the stated feature, integral, step, operation, element, and / or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. The terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "top," "bottom," etc., as used in this disclosure, indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the disclosure.

[0035] Unless otherwise specified, all terms used in this disclosure (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and will not be interpreted as having an idealized or overly formal meaning, unless expressly so defined in this disclosure.

[0036] Figure 1 This diagram illustrates a typical thermal layout for a 2U dual-node server. Figure 1 As shown, the two CPU heatsinks (liquid cooling plates) 4 are respectively mounted on the two CPU chips (which are...) on the server motherboard 7. Figure 1The two CPU heatsinks 4 are blocked by the heatsink 4. Liquid cooling media flows through the two heatsinks 4 via liquid cooling pipes 5. These pipes are connected to an external liquid supply device via fluid connectors 6, carrying away heat from the two CPU chips. Installing and removing the CPU heatsinks 4 typically requires at least two people: one to hold both heatsinks 4, and the other to install and manage the liquid cooling pipes 5. This significantly reduces production and field maintenance efficiency.

[0037] Firstly, referring to Figure 2 and Figure 3 This disclosure provides a lifting device 1 for a heat sink, wherein the heat sink may be, but is not limited to, the heat sink. Figure 1 CPU heatsink 4 is shown. Figure 2 This is an exploded view of the lifting device 1. Figure 3 This is an assembly diagram of the lifting device 1. (Refer to...) Figure 2 and Figure 3 The lifting device 1 includes: a pair of fixed seats 10 for fixing to a pair of heat dissipation plates respectively; a lifting body 20, the two ends of which are formed as a pair of arms 21 facing each other, the end 211 of each arm 21 is hinged to a hinge point 12 on the side wall 11 of the corresponding fixed seat 10, and each arm 21 is formed with a groove 212 extending longitudinally along the arm 21; and a pair of locking devices 30 for cooperating with the pair of arms 21 and the pair of fixed seats 10 to releaseably lock the pair of arms 21 of the lifting body 20 in a predetermined position to the pair of fixed seats 10.

[0038] Each fixing seat 10 has a side wall 11 forming an arc-shaped outer edge 13 around the corresponding hinge point 12, and locking grooves 141 and 142 corresponding to the predetermined positions are formed on the outer sides of both ends of the arc-shaped outer edge 13.

[0039] Each locking device 30 includes a spring 31 and a slider 32. One end 311 of the spring 31 is connected to a corresponding arm 21, and the other end 312 contacts the slider 32 to apply a force toward the hinge point 12 to the slider 32. A first portion 321 of the slider 32 is placed in a groove 212 of the arm 21 and configured to slide longitudinally along the arm 21. A second portion 322 of the slider 32 protrudes from the groove 212 and is configured to abut against the arcuate outer edge 13 and engage in the locking grooves 141, 142 under the force of the spring 31. An unlocking structure is formed on the second portion 322 of the slider 32, which is configured to be operated by a user to apply an external force to the slider 32 that overcomes the force of the spring 31.

[0040] The lifting device 1 for heat sinks provided in this embodiment allows a user (such as a maintenance personnel) to lift two heat sinks 4 at once by means of a lifting body 20 hinged to a fixed base 10. While holding the heat sink 4 with one hand, the user can use the other hand to install and manage the liquid cooling pipes 5, install and remove screws, or perform other operations. With the help of a specially designed locking device 30 and the structure of the side wall 11 of the fixed base, the user can easily lock the lifting body 20 in a predetermined position and unlock it from the predetermined position. The locking of the lifting body 20 in the predetermined position is reliable and will not be unlocked due to accidental contact, which greatly improves the efficiency of production and field operation and maintenance.

[0041] It should be noted that, Figure 2 and Figure 3 The XY coordinates in the figure are established relative to the lifting body 20, and are only for the convenience of describing the structure of the lifting body 20 and its cooperating components.

[0042] In some embodiments, the carrying body 20 is generally U-shaped, including a pair of arms 21 extending generally in the Y direction and a crossbar 22 connecting the pair of arms 21 extending generally in the X direction. To make efficient use of space, the distance between the portions of the pair of arms 21 with grooves 212 (i.e., near the ends of the arms 21) can be smaller than the distance between the portions of the pair of arms 21 connected to the crossbar 22 (i.e., near the base ends of the arms 21), meaning the arms 21 can have a short tapered section. Of course, the arms 21 can also be designed as straight plates, straight bars, curved plates, curved bars, or other forms; this disclosure does not impose any special limitations on this.

[0043] In some embodiments, each mounting base 10 includes a base plate 15, a side wall 11 erected from one side of the base plate 15 in the X direction, and an end wall 16 erected from the base plate 15 and connected to one end of the side wall 11. The base plate 15, side wall 11, and end wall 16 may be an integral structure, wherein the base plate 15 is used for fixed connection to the top surface of the heat sink 4, the side wall 11 is used for hinge connection to the arm 21 and to form an arcuate outer edge 13 and locking grooves 141, 142; the end wall 16 is used to increase the strength of the side wall 11 and to limit the rotation range of the lifting body 20 (arm 21). In some embodiments, the arcuate outer edge 13 is an arcuate outer edge centered at the hinge point 12. In some embodiments, connecting holes 18 are provided at both ends of the base plate 15, and screws (not shown) are correspondingly provided on the heat sink 4, and the base plate 15 and the heat sink 4 are fixedly connected by countersunk screws 19. Of course, the mounting base 10 and its connection structure with the heat sink 4 can also take different forms, and this disclosure does not impose any special restrictions on this.

[0044] In some embodiments, each arm 21 has a through hole at its end 211, and each mounting base 10 has a corresponding screw hole at its hinge point 12. A connecting bolt 17, with a threaded end and a smooth rod at the other end, can be used as a pivot. The connecting bolt 17 is passed through the corresponding through hole and screwed into the corresponding screw hole, thereby hinged each arm 21 to the side wall 11 of the corresponding mounting base 10. To facilitate the rotation of the lifting body 20, the smooth rod portion of the connecting bolt 17 can be a stepped shaft. Of course, other hinge structures can also be used between the arm 21 and the side wall 11, and this disclosure does not impose any special limitations on this.

[0045] In some embodiments, to facilitate user operation of the unlocking mechanism, a pair of grooves 212 are formed on the opposing surfaces of a pair of arms 21. Thus, the unlocking mechanism is located on the outer side of the opposing surfaces of the arms 21, allowing the user to operate the unlocking mechanism with their index and / or middle fingers.

[0046] In some embodiments, the width of the first portion 321 of each slider 32 is greater than the width of the second portion 322 of the slider 32. Each locking device 30 also includes a cover plate 34 that covers the groove 212 of the corresponding arm 21 and is fixed to the arm 21 (e.g., by a plurality of small countersunk screws 342). The cover plate 34 has an opening 341 extending longitudinally along the arm 21. The width of the opening 341 is greater than or equal to the width of the second portion 322 of the corresponding slider 32 to allow the second portion 322 to pass through, and the width of the opening 341 is less than the width of the first portion 321 of the corresponding slider 32 to prevent the first portion 321 from disengaging from the groove 212. In addition, in some embodiments, protrusions (or hooks) that cooperate with the spring 31 are formed on the end face of the first portion 321 of the slider 32 near the crossbar portion 22 and on the end face of the groove 212 near the crossbar portion 22, respectively. When assembling the locking device 30, the first part 321 of the slider 32 can be placed in the groove 212, the spring 31 can be installed between the two protrusions, and then the second part 321 of the slider 32 can be passed through the opening 341 of the cover plate 34. The cover plate 34 can be fixed to the outer surface of the arm 21 with a countersunk screw 342. In this way, the slider 32 is installed in the groove 212 without falling out, and can reciprocate in the Y direction (i.e., the longitudinal direction of the groove 212 and the length direction of the opening 341), while being subjected to a force (force in the Y direction) applied by the spring 31 toward the hinge point 12. It is understood that... Figure 2 The spring 31 that applies the thrust shown can also be replaced by a tension spring connecting the end face of the first part 321 of the slider 32 away from the crossbar 22 and the end face of the groove 212 away from the crossbar 22. In addition, the cover plate 34 can be replaced by other structures that prevent the slider 32 from falling out (e.g., using a T-shaped groove 212), and this disclosure does not impose any special limitations on these.

[0047] In some embodiments, the first portion 321 of each slider 32 is formed as a rectangular block, and the second portion 322 of each slider 32 is formed as a cylindrical block, preferably a cylindrical block (see reference). Figure 4 ).

[0048] In some embodiments, the unlocking mechanism is a hook 33 connected to the second portion 322 of the slider 32, the hook 33 being arranged further away from the hinge point 12 than the second portion 322 of the slider 32, and the hook 33 being configured to be hooked by a user's finger. Figure 4 As shown more clearly, a rib 332 can be connected between the end of the hook handle 33 and the second part (cylindrical block) 322 of the slider 32. The length of the rib 332 can be designed as needed to facilitate the user's operation of the hook handle 33.

[0049] In other embodiments, the second portion 322 of the slider 32 can be directly lengthened to replace the hook handle 33. In this case, the second portion 322 of the slider 32 spans and protrudes from the side wall 11 of the corresponding fixing seat 10 (e.g., protruding outward from the side wall 11 by about 1 cm), so that the unlocking structure is directly formed by the portion of the second portion 322 of the slider 32 that protrudes from the side wall 11.

[0050] In some implementations, each unlocking structure is formed as a single unit.

[0051] In some implementations, reference Figure 1 , Figure 2 , Figure 5 Each sidewall 11 has two locking grooves 141 and 142, which are located on the outer sides of the two ends of the arcuate outer edge 13 of the sidewall 11 and are adjacent to the two ends of the arcuate outer edge 13. However, this disclosure is not limited thereto. As needed, the number of locking grooves may be one, three or more, and all or part of the locking grooves may be formed on the arcuate outer edge 13.

[0052] Figure 5 This is a schematic diagram formed by superimposing views of the lifting device when the lifting body 20 is in different positions. For example... Figure 5 As shown, in some embodiments, the predetermined positions of the carrying body 20 include: a folded position in which the carrying body 20 is horizontally positioned relative to the pair of heat dissipation plates 4, and an open position in which the carrying body 20 is vertically positioned relative to the heat dissipation plates 4. For example... Figure 5 As shown, when the lifting body 20 is in the folded position, the second part 322 of the slider 32 is locked in the locking groove 141, and when the lifting body 20 is in the open position, the second part 322 of the slider 32 is locked in the locking groove 142.

[0053] By providing a folding position, the height of the entire lifting device can be reduced during normal use, minimizing the impact on other components. By providing an open position, the user can lift the lifting device and its fixed heat sink with one hand, and the lifting body will not wobble relative to the fixed base after being lifted.

[0054] The specific steps for switching the carrying handle from the folded position to the open position are as follows: Figure 5 As shown: 1. The user hooks their fingers onto the unlocking mechanisms of the left and right sliders 32 respectively, thereby overcoming the spring force and pulling the sliders 32 upwards, causing each slider 32 (second part 322) to disengage from the locking groove 141; 2. When the slider 32 disengages from the locking groove 141, the user rotates the lifting body 20 upwards. At this time, the fingers no longer need to hook onto the unlocking mechanisms, and the slider 32 can slide smoothly along the arc-shaped outer edge 13 of the side wall 11 while its second part 322 is in contact with the arc-shaped outer edge 13; 3. When the lifting body 20 reaches the open position, the second part 322 of the slider 32 can automatically engage with the locking groove 142 under the spring force, thereby locking the slider 32 in the open position. Except for changing the upward rotation of the lifting body 20 to a downward rotation, the operation of switching the lifting body from the open position to the folded position is similar to steps 1-3 above, and will not be repeated here.

[0055] Although the lifting device for heat sinks provided in the embodiments of this disclosure is particularly suitable for CPU heat sinks in liquid-cooled servers, this disclosure is not limited thereto. The lifting device can also be applied to heat sinks of other heat-generating devices such as GPUs. The heat sink can be a liquid-cooled heat sink, an air-cooled heat sink, or a semiconductor heat sink utilizing the Peltier effect, etc.

[0056] As an example, in the case of a 2U server chassis, refer to Figure 3 When the carrying body 20 is in the folded position, the size of the carrying device 1 in the X direction can be 15-17cm, the size in the Y direction can be 10-13cm, and the size in the height direction perpendicular to the X and Y directions can be about 4cm.

[0057] Secondly, referring to Figure 6 and Figure 7 This disclosure also provides a heat dissipation device, which includes a lifting device 1 as described in the first aspect of this disclosure, and a pair of heat dissipation plates 4. The pair of heat dissipation plates 4 are spaced apart from each other, and the top surfaces of the heat dissipation plates 4 are respectively fixed to the bottom surfaces of a pair of fixing seats 10 of the lifting device 1.

[0058] In some embodiments, as described above, the heat sink 4 and the mounting base 10 can be connected by countersunk screws 19 (see...). Figure 2 (To be fixed)

[0059] In some embodiments, the heat sink 4 is a liquid-cooled plate, and the heat dissipation device further includes at least one liquid-cooled pipe 5 connected to one or both of the pair of heat sinks 4.

[0060] In some implementations, such as Figure 6 and Figure 7 As shown, the two heat sinks 4 are connected to three liquid cooling pipes 51-53. Two of the liquid cooling pipes 51 and 52 are connected at one end to a fluid connector 6 to connect to an external liquid supply device. The other liquid cooling pipe 53 connects the outlet of one heat sink 4 to the inlet of the other heat sink 4. Each heat sink 4 has a liquid cooling channel (not shown) formed inside between the inlet and outlet. The liquid cooling pipe 53 may be longer than the lifting body 20 so that it does not interfere with the liquid cooling pipe 53 during rotation of the lifting body 20.

[0061] Thirdly, embodiments of this disclosure also provide a server, the server comprising: a heat dissipation device according to the second aspect of this disclosure; and at least two CPU chips, wherein a pair of heat sinks in the heat dissipation device are respectively mounted on two of the at least two CPU chips for dissipating heat from the two CPU chips.

[0062] Understandably, assuming there are 4 (or 6, 8) CPU chips in the server, a heat dissipation device according to the second aspect of this disclosure can be applied to every two CPU chips, that is, a lifting device according to the first aspect of this disclosure can be applied.

[0063] In some implementations, the server is a dual-node CPU liquid-cooled server of 2U or larger (4U / 6U / 8U).

[0064] In a server chassis (e.g., but not limited to a 2U chassis), in addition to the CPU, components such as memory modules and windshields (not shown) are also installed. The server provided in this embodiment, when the lifting body is at its lowest height (folded position), will not interfere with the memory modules between the CPU and the windshield above, and will not affect the installation and maintenance of components such as memory modules and windshields, making the production and maintenance of the entire machine more flexible and convenient.

[0065] This disclosure has disclosed exemplary embodiments, and although specific terminology has been used, it is for general illustrative purposes only and should not be construed as limiting. In some instances, it will be apparent to those skilled in the art that features, characteristics, and / or elements described in conjunction with particular embodiments may be used alone, or in combination with features, characteristics, and / or elements described in conjunction with other embodiments, unless otherwise expressly indicated. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of this disclosure as set forth by the appended claims.

Claims

1. A lifting device for a heat sink, characterized in that, The lifting device includes: A pair of mounting brackets, used to fix a pair of heat sinks respectively; The carrying body has two ends forming a pair of opposing arms, the end of each arm being hinged to a hinge point on the side wall of a corresponding fixed base; and A pair of locking devices are provided for cooperating with the pair of arms and the pair of fixing seats to releasably lock the pair of arms of the lifting body, which is in a predetermined position, onto the pair of fixing seats, wherein... Each fixed seat has a side wall with an arc-shaped outer edge around the corresponding hinge point, and a locking groove corresponding to the predetermined position is formed on the arc-shaped outer edge and / or on the outer side of the end of the arc-shaped outer edge. Each arm has a groove extending longitudinally along the arm; Each locking device includes a spring and a slider. One end of the spring is connected to a corresponding arm, and the other end contacts the slider to apply a force toward the hinge point. A first portion of the slider is placed in a groove in the arm and configured to slide longitudinally along the arm. A second portion of the slider protrudes from the groove and is configured to abut against the arcuate outer edge and engage in the locking groove under the force of the spring. An unlocking structure is connected to or formed on the second portion of the slider, the unlocking structure being configured to be operated by a user to apply an external force to the slider that overcomes the force of the spring.

2. The lifting device according to claim 1, characterized in that, The predetermined positions include: a folded position in which the carrying body is horizontally positioned relative to the pair of heat dissipation plates, and an open position in which the carrying body is vertically positioned relative to the heat dissipation plates.

3. The lifting device according to claim 1, characterized in that, The unlocking mechanism is a hook connected to the second part of the slider, the hook being further away from the hinge point than the second part, and the hook being configured to be hooked by the user's finger. or The second portion of the slider crosses over and protrudes from the side wall of the corresponding mounting base, and the unlocking structure is formed by the portion of the second portion protruding from the side wall.

4. The lifting device according to any one of claims 1 to 3, characterized in that, The width of the first part of each slider is greater than the width of the second part of the slider; Each locking device also includes a cover plate that covers and secures to the corresponding arm's groove. The cover plate has an opening extending longitudinally along the arm, the width of which is greater than or equal to the width of a second portion of the corresponding slider to allow the second portion to pass through. The width of the opening is less than the width of a first portion of the corresponding slider to prevent the first portion from dislodging from the groove.

5. The lifting device according to claim 4, characterized in that, The first part of each slider is formed as a rectangular block, and the second part of each slider is formed as a cylindrical block.

6. The lifting device according to any one of claims 1 to 3, characterized in that, The pair of arms form the grooves on surfaces that are opposite to each other.

7. The lifting device according to claim 6, characterized in that, The carrying body also includes a crossbar that connects the pair of arms. The distance between the grooved portions of the pair of arms is less than the distance between the portions of the pair of arms that are connected to the crossbar.

8. A heat dissipation device, characterized in that, The heat dissipation device includes: The lifting device according to any one of claims 1 to 7; and A pair of heat sinks, the pair of heat sinks being spaced a certain distance apart, and the top surfaces of the pair of heat sinks being fixed to the bottom surfaces of the pair of mounting bases respectively.

9. The heat dissipation device according to claim 8, characterized in that, The heat dissipation device further includes at least one liquid cooling pipe connected to one or both of the pair of heat dissipation plates.

10. A server, characterized in that, The server includes: The heat dissipation device according to claim 8 or 9; and At least two CPU chips, of which, The pair of heat sinks are respectively installed on two of the at least two CPU chips to dissipate heat from the two CPU chips.

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