WO2023124569A1

WO2023124569A1 - Fastener, heat dissipation module and electronic device

Info

Publication number: WO2023124569A1
Application number: PCT/CN2022/131151
Authority: WO
Inventors: 李洋
Original assignee: 北京比特大陆科技有限公司
Priority date: 2021-12-28
Filing date: 2022-11-10
Publication date: 2023-07-06
Also published as: CN217336227U

Abstract

The embodiments of the present disclosure provide a fastener, a heat dissipation module and an electronic device. The fastener comprises a stem and an insulating limiting member. The stem comprises a first portion and a second portion connected to the first portion. The insulating limiting member is sleeved on the second portion.

Description

Fasteners, cooling modules and electronic equipment

Cross References to Related Applications

This application is based on a Chinese patent application with application number 202123348781.8 and a filing date of December 28, 2021, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The present disclosure relates to the field of electronic technology, in particular to a fastener, a heat dissipation module and electronic equipment.

Background technique

In current electronic equipment, heat sinks are generally installed on devices with severe heat generation, and heat sinks are generally fixed on surfaces such as printed circuit boards (PCB) by screws. In the related art, positioning steps are often formed on the studs of the screws to contact the PCB, so as to prevent the heat sink from crushing the PCB device.

Utility model content

Embodiments of the disclosure provide a fastener, a heat dissipation module, and an electronic device.

The first aspect of the embodiments of the present disclosure provides a fastener, including: a rod body and an insulating stopper;

The rod body includes a first part and a second part connected with the first part;

The insulating limiting member is sheathed on the second part.

In one embodiment, the second portion comprises a first section and a second section, the first section is close to the first section, and the second section is away from the first section;

The insulating limiting member is sheathed on the first section; the second section is provided with threads.

In one embodiment, the outer surface of the first section is knurled.

In one embodiment, the material of the insulating limiter includes:

insulating plastic;

and / or,

Insulated fabric.

In one embodiment, the insulating plastic includes at least one of the following: nylon PA, polycarbonate PC, poly-acrylonitrile-butadiene-styrene ABS, polyethylmethacrylate PMMA, polypropylene plastic PP.

In one embodiment, the insulating cloth includes: nylon cloth.

In one embodiment, the fastener further includes: an elastic component; the elastic component is sheathed on the first part.

In one embodiment, the first diameter of the first portion is larger than the second diameter of the second portion.

In one embodiment, the insulating limiting member is sleeved on the second part through interference fit, glue or screw fit.

In one embodiment, the fastener is used to connect the heat sink and the heat generating module; the first part is used to be assembled in the heat sink, and the second part is used to be fixedly connected to the heat generating module .

In one embodiment, the upper surface of the insulating limiting member is in contact with the first part, and the lower surface of the insulating limiting member is in contact with the heat generating module.

The second aspect of the embodiments of the present disclosure provides a heat dissipation module, including: a heat dissipation plate and the fastener described in one or more of the foregoing technical solutions;

The fastener is used to connect the heat dissipation plate and the heat generating module.

In one embodiment, the heat dissipation plate has a mounting position;

The first part of the fastener is assembled in the installation position, and the second part of the fastener is used for fixed connection with the heat generating module; the insulating limiter of the fastener is used for Contact with the heat generating module.

In one embodiment, the fastener further includes: an elastic component;

The elastic component and the first part are jointly assembled in the installation position.

The third aspect of the embodiments of the present disclosure provides an electronic device, including: a heat generating module and the heat dissipation module described in one or more of the foregoing technical solutions;

The fastener in the heat dissipation module is used to connect the heat generation module and the heat dissipation plate in the heat dissipation module.

In one embodiment, the heat generating module has mounting holes;

The second part of the fastener is fixedly connected with the heat generating module through the installation hole.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

In the technical solution provided in the embodiments of the present disclosure, the fastener includes: a rod body and an insulating limiter; the rod body includes a first part and a second part connected to the first part; the insulating limiter is sleeved on the Describe the second part. In this way, by setting the insulating limiting member on the second part, when the fastener is connected to the heat-generating module such as the PCB to be dissipated, the insulating limiting member can be positioned in contact with the heat-generating module, and the second part of the fastener can be restrained. The metal step surface between the first part and the second part is in direct contact with the heat generating module to be dissipated, and there is no need to arrange pads on the heat generating module, so that the available area on the heat generating module will not be wasted.

For the technical solutions provided by the embodiments of the present disclosure, it should be understood that the above general description and the following detailed descriptions are only exemplary and explanatory, and cannot limit the embodiments of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

Fig. 1 is a structural schematic diagram of a fastener shown according to an exemplary embodiment;

Fig. 2 is a structural schematic diagram of a fastener shown according to an exemplary embodiment;

Fig. 3 is a structural schematic diagram of a fastener shown according to an exemplary embodiment;

Fig. 4 is a schematic structural diagram of a heat dissipation module according to an exemplary embodiment;

Fig. 5 is a schematic structural diagram of an electronic device according to an exemplary embodiment;

Fig. 6 is a schematic structural diagram of a spring screw according to an exemplary embodiment.

Explanation of reference signs

1. Fasteners; 2. Cooling plate; 3. Heat generating module;

11. Rod body; 12. Insulation limiter; 13. Elastic component; 111. First part; 112. Second part;

1121, the first paragraph; 1122, the second paragraph.

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the embodiments of the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of embodiments of the invention.

Terms used in the embodiments of the present disclosure are for the purpose of describing specific embodiments only, and are not intended to limit the embodiments of the present disclosure. As used in this disclosure, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

It should be understood that although the embodiments of the present disclosure may use the terms first, second, third, etc. to describe various information, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of the embodiments of the present disclosure, first information may also be called second information, and similarly, second information may also be called first information. Depending on the context, the word "if" as used herein may be interpreted as "at" or "when" or "in response to a determination."

As shown in FIG. 1 , an embodiment of the present disclosure provides a fastener 1, including: a rod body 11 and an insulating stopper 12;

The rod body 11 includes a first part 111 and a second part 112 connected with the first part 111;

The insulating limiting member 12 is sheathed on the second portion 112 .

In an embodiment of the present disclosure, the fastener 1 may be a device for fixing one or more objects through connection, for example, may be a screw, a bolt, a rivet, or the like.

The two ends of the rod body 11 of the fastener 1 can be respectively used to connect with one object, so as to realize the relative fixation of the two objects. For example, the fastener can be respectively connected to a heat dissipation plate and a heat generation module, for example, the heat generation module can be a PCB or a chip, so as to realize the fixed connection between the heat dissipation module and the heat generation module.

In one embodiment, the outer diameters of the first part 111 and the second part 112 of the rod body 11 can be the same or different, for example, the outer diameter of the first part 111 can be larger than the outer diameter of the second part 112, and correspondingly, the outer diameter of the second part 112 can be sleeved on the second part. The upper surface of the insulating limiting member 12 of the part 112 can be clamped with the stepped surface formed between the first part 111 and the second part 112, so that when the lower surface of the insulating limiting member 12 is docked with the heat generating module, it can realize Positioning limit function.

In another embodiment, the first part 111 can be used for assembling in the heat dissipation plate, and the part of the second part 112 not covered by the insulating limiting member 12 can be used for assembling in the heat generating module. The diameters of the first part 111 and the second part 112 can also be the same. At this time, the insulating limiting member 12 can be clamped between the heat dissipation module and the heat generating module to realize the function of positioning and limiting.

In one embodiment, the insulating limiting member 12 has insulating properties, and is made of insulating material or at least the surface is covered with insulating material, such as plastic material and/or cloth.

In another embodiment, the material of the insulating limiting member 12 is a material with a coefficient of stiffness greater than a preset value, or a material with a modulus of elasticity lower than a preset value, so as to better realize the connection between the heat dissipation plate and the heat generating module. The limiting function between them can reduce the deformation of the insulating limiting member 12 under the pressure of the heat sink.

In yet another embodiment, the material of the insulating limiting member 12 is a material whose thermal conductivity is lower than a predetermined value, thereby reducing the heat conduction of the insulating limiting member 12 and prolonging the life of the insulating limiting member 12 .

In another embodiment, the insulating limiting member 12 may be a device in the shape of a sleeve, and the width of the inner diameter of the insulating limiting member 12 may be determined according to the outer diameter of the second part 112 . For example, the inner diameter of the insulating limiting member 12 may be greater than the outer diameter of the second part 112 and the difference is lower than a preset value, so as to ensure that the insulating limiting member 12 can be sleeved on the second part 2 without falling off.

In yet another embodiment, the insulating limiting member 12 may be in the shape of a cylinder with the same area of the upper surface and the lower surface, or may be in the shape of a truncated cone with different areas of the upper surface and the lower surface. For example, when the lower surface is used to contact the heat generating module, the area of the lower surface can be larger than the area of the upper surface, thereby further reducing the pressure on the heat generating module.

In yet another embodiment, the width of the inner diameter of the insulating limiting member 12 can also be equal to or smaller than the diameter of the second part 112. At this time, the material of the insulating limiting member 12 needs to be a material with elasticity, such as nylon cloth, etc., so that The insulating limiting member 12 is sheathed on the second part 112 by means of interference fit, etc., and is not easy to fall off.

In the related art, the rod body 11 is generally arranged in a stepped shape, and is positioned on the PCB through the stepped surface formed on the rod body 11 . Because of the strength of the PCB, the size of the steps should not be too small, as a too small step surface will crush the PCB surface, so the outer diameter of the rod body 11 is generally larger, usually larger than 6mm. Moreover, since the stepped surface of the rod body 11 is metal, it is easy to rub off the green oil on the contact part with the PCB, so it is necessary to make a corresponding pad on the PCB with a diameter larger than the outer diameter of the rod body 11 . The position where the pad is located is forbidden to place devices and lines, which will also interrupt the copper skin network of the entire board, and the PCB layout of electronic products is becoming increasingly compact, and the position of the pad leads to a lot of area waste.

In this way, the second part of the rod body is sleeved by the insulating stopper, so that when the heat-generating modules such as the PCB are fixedly connected by the fastener 1, the non-metallic insulating stopper can be used instead of the step surface of the rod body to achieve positioning limit function. Therefore, the safety of the electrical function of the PCB itself can be guaranteed, and the damage to the surface of the PCB such as the metal step can be suppressed. There is no need to set additional pads, and the utilization rate of the available area on the PCB can be greatly improved.

In some embodiments, the second part 112 includes a first segment 1121 and a second segment 1122, the first segment 1121 is close to the first part 111, and the second segment 1122 is away from the first part 111;

The insulating limiting member 12 is sheathed on the first section 1121; the second section 1122 is provided with threads.

In the embodiment of the present disclosure, as shown in FIG. 2 , the part of the second part 112 used for sheathing the insulating limiting part 12 is the first section 1121 , and the part used for assembling in the heat generating module is the second section. 1122. Wherein, the distance between the first segment 1121 and the first portion 111 is smaller than the distance between the second segment 1122 and the first portion 111 . For example, the distance between the end of the first segment 1121 away from the first part 111 and the center of the first part 111 is smaller than the distance between the end of the second segment 1122 close to the first part 111 and the center of the first part 111 .

In one embodiment, the length of the first segment 1121 may be greater than or equal to the length of the insulating limiting member 12 . Here, the length of a certain part of the rod body 11 is the length along the radial direction of the rod body 11 , and the length of the insulating limiting member 12 is the length along the axial direction of the insulating limiting member 12 .

In another embodiment, in order to strengthen the connection stability of the fastener 1, the length of the second section 1122 may be greater than the length of the first section 1121, and/or, in order to strengthen the limiting function of the insulating limiting member 12, the second section 1122 The length of a section 1121 or the length of the insulating stopper 12 may be greater than a preset threshold.

In one embodiment, the thread provided on the second segment 1122 may be a protruding thread on the second segment 1122, and correspondingly, the outer diameter of the second segment 1122 having a protruding thread may be slightly larger than the first The outer diameter of the segment 1121 ; or, it can also be the groove-shaped thread on the second segment 1122 , correspondingly, the outer diameter of the second segment 1122 with the groove-shaped thread can be equal to the outer diameter of the first segment 1121 .

In this way, the insulating limiting member 12 is arranged on the second part 112 at a section close to the first part 111, so that when the fastener 1 is fastened to connect the heat dissipation plate and the heat generating module, the insulating limiting member 12 can be placed on the fastener 1 The middle part, that is, between the cooling plate and the heat generating module, realizes the positioning and limiting function.

In some embodiments, the outer surface of the first section 1121 is knurled.

Here, by pressing the knurl on the outer surface of the first section 1121, the frictional force between the outer surface of the first section 1121 and the inner surface of the insulating limiting member 12 is increased, thereby further reducing the risk of the insulating limiting member 12 falling off. risk.

In one embodiment, on the inner surface of the insulating limiter 12 that is used to contact the first section 1121, knurling or protrusions that cooperate with the knurling on the outer surface of the first section 1121 may also be provided for The risk of falling off of the insulating stopper 12 is further reduced.

In some embodiments, the material of the insulating limiting member 12 includes:

insulating plastic;

and / or,

Insulated fabric.

In the embodiment of the present disclosure, the insulating plastic may include various insulating plastic materials, such as: nylon (Polyamide, PA), polycarbonate (Polycarbonate, PC), poly-acrylonitrile-butadiene-styrene (Acrylonitrile butadiene At least one of Styrene copolymers, ABS), polyethyl methacrylate (polymethyl methacrylate, PMMA), polypropylene plastic (Plastics-Polypropylene, PP).

In one embodiment, the insulating cloth may be at least one of nylon cloth, Oxford cloth or other similar insulating cloths.

In this way, based on the material selection of the insulating limiting member 12, the damage to heat-generating modules such as the PCB can be sufficiently reduced, so that when positioning and limiting are performed based on the insulating limiting member 12, copper sheets and wiring can still be laid on the PCB, There is no need to provide corresponding pads on the PCB, thereby saving the available area occupied by the pads.

In some embodiments, the insulating plastic includes at least one of the following: nylon PA, polycarbonate PC, poly-acrylonitrile-butadiene-styrene ABS, polyethylmethacrylate PMMA, polypropylene plastic PP.

In some embodiments, the fastener 1 further includes: an elastic component 13 ; the elastic component 13 is sheathed on the first part 111 .

In the embodiment of the present disclosure, as shown in FIG. 3 , the elastic component 13 may be a spring, a leaf spring, a bellows, or other elements with elastic functions. The elastic part 13 is sleeved on the first part 111, and is used to be assembled in the heat dissipation plate together with the first part 111, and is used to form a spring screw together with the rod body 11 and the insulating stopper 12, and the heat dissipation plate is controlled by the expansion and contraction of the elastic part 13 The contact force to the heat generating module reduces the damage to the heat generating module.

In one embodiment, the natural length of the elastic member 13 without external force may be less than or equal to the length of the first part 111 , so as to facilitate assembly with the first part 111 in the heat sink.

In another embodiment, if the weight of the cooling plate is large, or the heat generating modules such as PCB have low compressive resistance, the natural length of the elastic member 13 without external force can also be greater than the length of the first part 111, so that when assembled in the heat dissipation After the inside of the board, it can better reduce the contact force of the heat sink on the heat generating module.

In some embodiments, the first diameter of the first portion 111 is greater than the second diameter of the second portion 112 .

Here, the first diameter may be the outer diameter of the first part 111 , and the second diameter may be the outer diameter of the second part 112 . If the second part 112 is further provided with threads, the second diameter may also be the outer diameter of the second part 112 , or may be the outer diameter of the shaft of the second part except the threads.

In one embodiment, the first diameter may be greater than the inner diameter of the insulating limiting member 12 , so as to prevent the insulating limiting member 12 from displacing to the outer surface of the first portion 111 under a stressed state.

In this way, when the first diameter is larger than the second diameter, the insulating stopper 12 can be better clamped on the stepped surface between the first part 111 and the second part 112, so that the insulating stopper 12 can better pass through the insulating part when fastening the connection. The limiting member 12 realizes the function of positioning and limiting.

In some embodiments, the insulating limiting member 12 is sheathed on the second portion 112 through interference fit, glue or screw fit.

Here, when the sheathing method of interference fit is adopted, the inner diameter of the insulating limiting member 12 is smaller than the second diameter of the second part 112 , or the difference between the inner diameter and the second diameter is smaller than a certain threshold.

In one embodiment, when glue is used, the inner diameter of the insulating limiting member 12 may be equal to or smaller than the second diameter of the second part 112, so as to further increase the friction between the insulating limiting member 12 and the second part 112 .

In another embodiment, when a threaded fit is used, the inner surface of the insulating limiting member 12 may be provided with a first thread, and the part of the outer surface of the second part 112 that is in contact with the insulating limiting member 12 may be provided with a second thread. , wherein, the first thread and the second thread are threads that cooperate with each other.

In some embodiments, the fastener 1 is used to connect the heat sink and the heat generating module; the first part 111 is used to be assembled in the heat sink, and the second part 112 is used to be fixedly connected to the heat generating module.

In the embodiment of the present disclosure, the first part 111 can be assembled in the installation position or the installation hole of the heat sink. If the fastener 1 further includes the elastic part 13, the elastic part 13 and the first part 111 can be assembled in the heat sink together.

In one embodiment, the second part 112 can be fixedly connected to the heat generating module through the thread on the second section 1122. Correspondingly, a mounting hole can be provided on the heat generating module, and a The thread matching the thread on the second section 1122 is used for fixing and installing the fastener 1 .

In one embodiment, the insulating limiting member 12 sleeved on the first section 1121 of the second part 112 can be located between the heat dissipation plate and the heat generating module, for example, the outer diameter of the insulating limiting member 12 can be larger than the heat dissipation plate The diameter of the upper mounting position is greater than the diameter of the mounting hole on the heat generating module.

In some embodiments, the upper surface of the insulating limiting member 12 is in contact with the first part 111 , and the lower surface of the insulating limiting member 2 is used to be in contact with the heat generating module.

In the embodiment of the present disclosure, the upper surface of the insulating limiting member 12 may be in contact with the stepped surface formed between the first part 111 and the second part 112, for example, the outer diameter of the upper surface of the insulating limiting member 12 may be greater than or equal to The outer diameter of the stepped surface and the inner diameter of the upper surface are equal to or smaller than the outer diameter of the stepped surface.

In one embodiment, the contact surface where the upper surface of the insulating limiting member 12 abuts with the first part 111 may be inside the heat dissipation plate, or may be between the heat dissipation plate and the heat generating module.

In another embodiment, the fastener 1 forms a fastening connection through the first surface of the heat dissipation plate and the second surface of the heat generating module, and then the lower surface of the insulating limiting member 12 can be connected with the second surface of the heat generating module. Surface contact realizes the position limiting function between the fastener 1 and the heat generating module.

In this way, failures such as displacement and fall-off that occur when the insulation limiting member 12 realizes the positioning and limiting function can be better reduced.

As shown in FIG. 4 , an embodiment of the present disclosure provides a heat dissipation module, including: a heat dissipation plate 2 and fasteners 1 of one or more of the foregoing technical solutions;

The fastener 1 is used to connect the cooling plate 2 and the heat generating module.

In the disclosed embodiment, one end of the fastener 1 in the heat dissipation module is connected to the heat dissipation plate 2 , and the other end is used to connect with the heat generation module. Wherein, the heat dissipation plate 2 may also include: a heat dissipation mesh surface, a refrigeration device, and the like.

In one embodiment, the heat generating module may include a board facing the heat sink 2 and wiring, components, etc. arranged on the board. The heat sink 2 is used to dissipate the heat generated by the board. Wherein, the thickness of the plate surface can be less than or equal to the length of the second part 112 of the fastener 1, or the thickness of the plate surface can be less than or equal to the length of the second section 1122, so that the fastener 1 can be better assembled on the on board.

In one embodiment, the heat dissipation plate 2 in the heat dissipation module can be connected with one or more fasteners 1 to increase the stability of the heat dissipation module assembly.

In another embodiment, the cooling module can be used to connect to one or more heat generating modules, and to dissipate heat from one or more heat generating modules.

In yet another embodiment, when multiple fasteners 1 are connected to the cooling plate 2, the distance between the fasteners 1 can be determined according to the pressure resistance of the fasteners 1, the pressure resistance of the heat generating module, etc. Determine, wherein, the degree of pressure resistance of the fastener 1 can be determined according to the upper surface or lower surface area of the insulating limiting member 12 in the fastener 1 .

In yet another embodiment, the fastener 1 can be specifically used to be connected to the heat generating module through screw fit, riveting, welding, and the like. Exemplarily, the fastener 1 passes through the thread provided on the second part 112 of the rod body 11, and the heat generating module

In some embodiments, there is an installation position on the cooling plate 2;

The first part 111 of the fastener 1 is assembled in the installation position, and the second part 112 of the fastener 1 is used for fixed connection with the heat generating module; the insulating limiter 12 of the fastener 1 is used for connecting with the heat generating module group contacts.

In an embodiment of the present disclosure, the mounting position may be a cavity-type mounting position for assembling part or all of the first part 111 in the mounting position, wherein the mounting position is used for loading the first part 111 of the fastener 1 The diameter of the opening may be slightly larger than the diameter of the first part 111 . In this way, after the fastener 1 is installed in the installation position, the inner surface of the opening of the installation position can be in close contact with the outer surface of the first part 111 , thereby better improving the stability of the fastener 1 .

In one embodiment, if the upper surface of the insulating limiting member 12 is close to the heat dissipation plate 2 and the lower surface is close to the heat generating module, the diameter of the upper surface of the insulating limiting member 12 may be equal to or greater than the diameter of the first part 111, and/or Alternatively, the diameter of the opening of the mounting position may be equal to or smaller than the diameter of the upper surface of the insulating limiting member 12 . In this way, the limiting function of the insulating limiting member 12 between the heat sink 2 and the heat generating module can be better improved.

In some embodiments, the fastener 1 further includes: an elastic component 13;

The elastic component 13 is assembled together with the first part 111 in the installation position.

In the embodiment of the present disclosure, when the elastic component 13 and the first part 111 are assembled together in the installation position, the expansion and contraction of the elastic component 13 can reduce the pressure formed by the heat dissipation plate 2 on the heat generation module, and further optimize the heat dissipation module. applicability.

In one embodiment, when the elastic member 13 is a spring, its natural length without external force can be equal to or slightly larger than the cavity length of the installation position, so as to reduce the pressure of the cooling plate 2 on the heat generating module.

As shown in FIG. 5 , an embodiment of the present disclosure provides an electronic device, including: a heat generating module 3 and a heat dissipation module of one or more of the aforementioned technical solutions;

The fastener 1 in the heat dissipation module is used to connect the heat generation module 3 and the heat dissipation plate 2 in the heat dissipation module.

In the embodiment of the present disclosure, the heat generating module 3 may be a chip or a circuit board waiting for heat dissipation, for example, it may be a printed circuit board PCB or the like.

In some embodiments, the heat generating module 3 has mounting holes;

The second part 112 of the fastener 1 is fixedly connected with the heat generating module 3 through the installation hole.

Here, the size of the mounting hole may match the diameter of the second part 112 , and the second part 112 penetrates or embeds the heat generating module 3 through the mounting hole to form a fixed connection with the heat generating module 3 .

In one embodiment, the mounting hole is used on the inner surface in contact with the second part 112, and a second thread that matches the first thread on the outer surface of the second part 112 can be provided, so that the second part 112 can rotate The way of matching is fixedly connected with the heat generating module 3 through the installation hole.

As shown in Figure 6, the embodiment of the present disclosure provides a spring screw that is applied under the positioning steps on the PCB without avoiding wiring, mainly including a screw rod, a spring and a nylon sleeve, wherein the nylon sleeve is crimped on the screw rod through interference fit. The lower part, and then assemble the spring, and realize the positioning and limiting of the spring screw through the lower part of the nylon sleeve.

The position where the screw rod matches the nylon sleeve is pressed with knurling to prevent the nylon sleeve from falling off due to external force. The heat sink is transferred to the circuit board through the spring screw of the embodiment of the present disclosure, and the heat sink is in direct contact with the circuit board. Among them, the spring screw is in contact with the PCB through the lower part of the nylon sleeve to realize the positioning and limit of the spring screw, which can realize the control of the force of the heat sink pressing on the chip through the compression of the spring.

In addition, the nylon sleeve is crimped on the smooth rod of the screw through interference fit. In addition, it is also possible to adopt the method of gluing the nylon sleeve and screwing the thread in the hole of the nylon sleeve.

The nylon sleeve does not limit the material of the sleeve, and sleeves of other plastic materials can also be used, such as PC, ABS, PMMA, PP, PA and other materials.

The embodiment of the present disclosure proposes a spring screw that is applied under the positioning steps on the PCB without avoiding wire routing: the screw rod of the spring screw is stepped, and a nylon sleeve is arranged under the step surface of the thick rod. The outer diameter of the nylon sleeve and The screw has a consistent thick shank with an inside diameter slightly smaller than the diameter of the threaded part. The upper part of the threaded part of the screw is not threaded, only the lower part is processed with threads, and the nylon sleeve is pressed into the non-threaded polished rod through interference fit, and positioned by the stepped surface of the screw itself.

In this way, the installation and positioning surface of the spring screw becomes one side of the nylon sleeve, and there is no need to set the corresponding pad on the PCB. The area where the nylon sleeve contacts on the PCB can be routed and copper can be arranged, and only the device is prohibited. , which greatly alleviates the problem of tight PCB layout.

While some embodiments of the present disclosure have been described, additional changes and modifications may be made to these embodiments by those skilled in the art once the basic inventive concept is understood. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the present disclosure.

Other embodiments of the disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. The present disclosure is intended to cover any modification, use or adaptation of the present disclosure. These modifications, uses or adaptations follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field not disclosed in the present disclosure. . The specification and examples are to be considered exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It should be understood that the present disclosure is not limited to the precise constructions which have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

A fastener, wherein the fastener includes: a rod body and an insulating stopper;

The rod body includes a first part and a second part connected with the first part;

The insulating limiting member is sheathed on the second part.
The fastener of claim 1, wherein said second portion includes a first segment and a second segment, said first segment proximate to said first portion, said second segment remote from said first portion;

The insulating limiting member is sheathed on the first section; the second section is provided with threads.
The fastener of claim 2, wherein the outer surface of the first section is knurled.
The fastener according to claim 1, wherein the material of the insulating limiting member comprises:

insulating plastic;

and / or,

Insulated fabric.
The fastener according to claim 4, wherein the insulating plastic comprises at least one of the following: nylon PA, polycarbonate PC, poly-acrylonitrile-butadiene-styrene ABS, polyethylmethacrylate PMMA, polypropylene plastic PP.
The fastener according to claim 4, wherein said insulating cloth comprises: nylon cloth.
The fastener according to claim 1, wherein the fastener further comprises: an elastic member; the elastic member is sheathed on the first part.
The fastener of claim 1, wherein the first diameter of the first portion is greater than the second diameter of the second portion.
The fastener according to claim 1, wherein the insulating limiting member is sheathed on the second part by interference fit, glue or screw fit.
The fastener according to claim 1, wherein the fastener is used to connect the heat sink and the heat generating module; the first part is used to be assembled in the heat sink, and the second part is used to be connected to the heat sink The heat generating module is fixedly connected.
The fastener according to claim 10, wherein the upper surface of the insulating limiting member is in contact with the first part, and the lower surface of the insulating limiting member is used to be in contact with the heat generating module.
A heat dissipation module, wherein the heat dissipation module comprises: a heat dissipation plate and the fastener according to any one of claims 1 to 11;

The fastener is used to connect the heat dissipation plate and the heat generating module.
The heat dissipation module according to claim 12, wherein the heat dissipation plate has a mounting position;

The first part of the fastener is assembled in the installation position, and the second part of the fastener is used for fixed connection with the heat generating module; the insulating limiter of the fastener is used for Contact with the heat generating module.
The heat dissipation module according to claim 12, wherein the fastener further comprises: an elastic component;

The elastic component and the first part are jointly assembled in the installation position.
An electronic device, wherein the device comprises: a heat generating module and a heat dissipation module according to any one of claims 12 to 14;

The fastener in the heat dissipation module is used to connect the heat generation module and the heat dissipation plate in the heat dissipation module.
The device according to claim 15, wherein the heat generating module has mounting holes;

The second part of the fastener is fixedly connected with the heat generating module through the installation hole.