Pressing structure, circuit board assembly and electrical equipment

Abstract

The utility model relates to a pressing structure, a circuit board assembly and electrical equipment, the pressing structure comprises a pressing piece and a base, the pressing piece and the base are oppositely arranged, and an accommodating space for a to-be-installed piece is formed between the pressing piece and the base; a first guide part is arranged on the side, close to the base, of the pressing piece, a second guide part is arranged on the side, close to the pressing piece, of the base, and the first guide part and the second guide part are matched in a concave-convex mode. According to the pressing structure, through concave-convex matching of the first guide part and the second guide part, precise positioning between the pressing piece and the base which are oppositely arranged is achieved, so that the containing space precisely attached to the to-be-installed piece is formed between the pressing piece and the base, and when the to-be-installed piece is placed in the containing space, the to-be-installed piece can be conveniently installed. The to-be-installed part can be pressed on the base through the pressing part, and fixing of the to-be-installed part is achieved. According to the installation mode, a screw through hole does not need to be reserved in the to-be-installed part, and the situation that the to-be-installed part is damaged due to excessive tightening when the screw is directly fastened and installed on the to-be-installed part can be avoided.

Description

Technical Field

[0001] This application relates to the technical field of manufacturing and assembly, and particularly to a pressing structure, a circuit board assembly, and an electrical device. Background Art

[0002] During the production and manufacturing process, when the size of parts is small, if the parts are directly installed by screws, there will be problems such as inconvenient operation and easy damage to the parts.

[0003] Taking the installation of electronic components such as MOS transistors (metal-oxide-semiconductor field-effect transistors) as an example, the existing assembly method is to reserve a through-hole in the middle of the MOS transistor, and connect the MOS transistor to the mounting base or heat sink after passing the screw through the through-hole. This method has relatively high operation requirements. If the screw is tightened too much, it may cause the MOS transistor to be cracked and damaged. If the screw is fastened too loosely, the MOS transistor cannot be well fixed on the mounting base or heat sink, which is not conducive to realizing the stable installation of the MOS transistor. Utility Model Content

[0004] This application provides a pressing structure, a circuit board assembly, and an electrical device to solve the technical problems of inconvenient operation and easy damage when small-sized parts are installed by screws in the prior art.

[0005] In a first aspect, this application provides a pressing structure, including:

[0006] A pressing member;

[0007] A base, the pressing member is disposed opposite to the base, and a receiving space for the part to be installed is formed between the pressing member and the base; a first guiding portion is provided on the side of the pressing member close to the base, and a second guiding portion is provided on the side of the base close to the pressing member, and the first guiding portion and the second guiding portion are in concave-convex fit.

[0008] Optionally, both the first guiding portion and the second guiding portion are inclined in a first direction.

[0009] Optionally, the first guiding portion includes a plurality of guiding columns, and the plurality of guiding columns are symmetrically arranged on the pressing member.

[0010] Optionally, the pressing structure further includes a connecting member, the connecting member is connected to the base, and a stress surface for abutting against the connecting member is provided on the pressing member.

[0011] Optionally, the stress surface is located at one end of the pressing member, the stress surface is inclined in a second direction, the first direction faces the side of the base, and the second direction faces the other side of the base.

[0012] Optionally, the connecting member has a force-applying surface that is matched with the stress surface.

[0013] Optionally, the force-applying surface is a conical surface.

[0014] Optionally, the pressing member is further provided with a mounting portion connected to the force-bearing surface, and the connecting member is inserted into the mounting portion.

[0015] Optionally, the mounting portion is located outside the accommodation space, and the mounting portion includes a U-shaped groove or a slotted hole.

[0016] Optionally, the connection between the connecting member and the base is detachable, and the base is provided with a connecting portion matching the connecting member.

[0017] In a second aspect, the present application provides a circuit board assembly, including the pressing structure provided in the first aspect of the present application, further including a heat dissipation member and a to-be-mounted member. The heat dissipation member is configured as the base, the to-be-mounted member is an electronic component, and the to-be-mounted member is disposed in the accommodation space.

[0018] Optionally, the circuit board assembly further includes an insulating member, and the insulating member is clamped between the to-be-mounted member and the base.

[0019] Optionally, the base is provided with a limiting portion matching the insulating member.

[0020] Optionally, the pressing member is provided with a first abutting portion matching the to-be-mounted member, and the insulating member is provided with a second abutting portion matching the to-be-mounted member.

[0021] Optionally, the circuit board assembly further includes a circuit board, the to-be-mounted member is electrically connected to the circuit board; the heat dissipation member is connected to the circuit board, and the pressing member and the to-be-mounted member are clamped between the heat dissipation member and the circuit board.

[0022] In a third aspect, the present application provides an electrical device, including the circuit board assembly provided in the second aspect of the present application.

[0023] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0024] For the pressing structure provided by the embodiment of the present application, the pressing member and the base are oppositely arranged. Through the concave-convex cooperation of the first guiding portion and the second guiding portion, precise positioning during the connection process between the pressing member and the base is achieved, so as to facilitate the formation of an accommodation space that precisely fits the to-be-mounted member between the pressing member and the base. When the to-be-mounted member is placed inside the accommodation space, the to-be-mounted member can be pressed against the base by the pressing member to realize the fixation of the to-be-mounted member. When the to-be-mounted member is disposed in the accommodation space, the outer surface of the to-be-mounted member contacts the inner wall of the accommodation space, which can increase the force-bearing area of the to-be-mounted member. When the pressing member presses on the to-be-mounted member, damage to the to-be-mounted member caused by excessive force in a local area can be avoided. This installation method does not require pre-reserving screw through holes on the to-be-mounted member, and can also avoid damage to the to-be-mounted member caused by over-tightening when the screw is directly fastened and installed on the to-be-mounted member. Description of the Drawings

[0025] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or in the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0027] One or more embodiments are exemplarily illustrated by the pictures in the corresponding accompanying drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the accompanying drawings represent similar elements. Unless otherwise stated, the figures in the accompanying drawings do not constitute a scale limitation.

[0028] Figure 1 Structural schematic diagram of the pressing structure provided for the embodiment of this application;

[0029] Figure 2 Structural schematic of the pressing member provided for the embodiment of this application Figure 1 ;

[0030] Figure 3 Structural schematic of the pressing member provided for the embodiment of this application Figure 2 ;

[0031] Figure 4 Cross-sectional view of the pressing member provided for the embodiment of this application;

[0032] Figure 5 Structural schematic diagram of the base (i.e., the heat dissipation member) provided for the embodiment of this application;

[0033] Figure 6 Cross-section of the base provided for the embodiment of this application Figure 1 ;

[0034] Figure 7 Cross-sectional view of the pressing structure provided for the embodiment of this application;

[0035] Figure 8 Front view of the connecting member provided for the embodiment of this application;

[0036] Figure 9 Cross-section of the base provided for the embodiment of this application Figure 2 ;

[0037] Figure 10 Structural schematic diagram of the component to be installed provided for the embodiment of this application;

[0038] Figure 11Schematic structure of the circuit board assembly provided by the embodiment of the present application Figure 1 ;

[0039] Figure 12 Schematic structure of the circuit board assembly provided by the embodiment of the present application Figure 2 ;

[0040] Figure 13 Exploded view of the circuit board assembly provided by the embodiment of the present application (the circuit board is not shown);

[0041] Figure 14 Cross-sectional view of the circuit board assembly provided by the embodiment of the present application;

[0042] Figure 15 Schematic structural diagram of the insulating part provided by the embodiment of the present application.

[0043] Explanation of reference numerals:

[0044] 1. Pressing part; 11. First guiding part; 111. Guiding column; 12. Force-bearing surface; 13. Mounting part; 14. First abutting part; 141. First abutting surface; 142. Second abutting surface; 143. Third abutting surface;

[0045] 2. Base; 21. Second guiding part; 211. Guiding hole; 22. Connecting part; 23. Limiting part; 231. Limiting groove; 232. Limiting boss; 24. Fixing part; 241. First column; 242. Second column; 25. Heat dissipation plate body;

[0046] 3. Connecting part; 31. Force-applying surface; 32. Threaded section;

[0047] 4. Component to be installed; 41. First positioning surface; 42. Second positioning surface; 43. Third positioning surface; 44. Pin; 45. Fourth positioning surface;

[0048] 5. Insulating part; 51. Second abutting part; 52. Contact surface;

[0049] 6. Circuit board. Detailed implementation manners

[0050] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0051] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0052] For ease of description, spatially relative relationship terms may be used in the text to describe the relative positional relationship or movement of one element or feature shown in the figure with respect to another element or feature. These relative relationship terms are, for example, "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", "front", "rear", etc. Such spatially relative relationship terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip, attitude change, or motion state change, then these directional indications will change accordingly. For example, an element described as "below" or "beneath" another element or feature will subsequently be oriented as "above" or "over" the other element or feature. Thus, the exemplary term "below" can include both the upper and lower orientations. The device may be oriented otherwise (rotated 90 degrees or in other directions) and the spatially relative relationship descriptors used in the text are interpreted accordingly.

[0053] To solve the technical problems in the prior art that the installation of small-sized components by screws is inconvenient to operate and easily damaged, the present application provides a pressing structure, a circuit board assembly, and an electrical device, which can realize the assembly and positioning between the pressing member 1 and the base 2 through the cooperation of the first guiding portion 11 and the second guiding portion 21, form a receiving space for receiving the to-be-installed member 4, and press the to-be-installed member 4 against the base 2 by the pressing member 1 to realize the assembly of small-sized components, with simple operation and not easily causing damage to the components.

[0054] Please refer to Figures 1 to 15 , in the first aspect of the embodiment of the present application, a pressing structure is provided, including a pressing member 1 and a base 2. The pressing member 1 and the base 2 are oppositely arranged, and a receiving space for the to-be-installed member 4 is formed between the pressing member 1 and the base 2. When the to-be-installed member 4 is placed inside the receiving space, the to-be-installed member 4 can be pressed against the base 2 by the pressing member 1 to realize the fixation of the to-be-installed member 4, as Figure 1 shown. The fixed installation of small-sized components can be realized through a crimping technique.

[0055] The pressing member 1 and the base 2 can be fixed by means of screw connection or snap connection, etc., so that the component 4 to be installed in the accommodation space is stably pressed on the base 2. This installation method does not require the component 4 to be installed to reserve screw through holes, and can also avoid damage to the component 4 to be installed caused by over-tightening when the screw is directly fastened and installed on the component 4 to be installed.

[0056] In order to realize the connection and positioning between the pressing member 1 and the base 2 and form an accommodation space matching the component 4 to be installed, a first guiding portion 11 is provided on one side of the pressing member 1 close to the base 2, and a second guiding portion 21 is provided on one side of the base 2 close to the pressing member 1. The first guiding portion 11 and the second guiding portion 21 are in concave-convex fit, so as to realize precise positioning during the connection process between the pressing member 1 and the base 2, and make the accommodation space formed between the pressing member 1 and the base 2 achieve precise fit with the component 4 to be installed, as Figures 1 to 7 shown.

[0057] It should be noted that when the component 4 to be installed is arranged in the accommodation space, the outer surface of the component 4 to be installed contacts the inner wall of the accommodation space, which can increase the force-bearing area of the component 4 to be installed. When the pressing member 1 presses on the component 4 to be installed, it can avoid damage to the component 4 to be installed caused by excessive force on a local area. The formation of the accommodation space can be realized by arranging a concave structure matching the component 4 to be installed on the pressing member 1 and / or the base 2.

[0058] In some embodiments of the present application, please refer to Figure 7 and Figure 14 , both the first guiding portion 11 and the second guiding portion 21 are inclined along the first direction, which can make the pressing member 1 move along the first direction during the process of pressing the component 4 to be installed, so as to apply a vertical component force and a horizontal component force to the component 4 to be installed through the pressing member 1, realizing two-way pressing of the component 4 to be installed in the vertical direction and the horizontal direction, and avoiding the component 4 to be installed from shaking inside the accommodation space.

[0059] In some embodiments of the present application, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 7 , the first guiding portion 11 includes a plurality of guiding columns 111, and the plurality of guiding columns 111 are symmetrically arranged on the pressing member 1, which can realize the uniform guiding effect on the pressing member 1, so that the pressing member 1 applies a uniform acting force to the component 4 to be installed, and makes the component 4 to be installed receive uniform force during the pressing process. It can avoid damage to the component 4 to be installed due to excessive pressure during assembly, and reduce production costs.

[0060] Correspondingly, the second guiding portion 21 includes a plurality of guiding holes 211, and the plurality of guiding holes 211 are arranged in one-to-one correspondence with the plurality of guiding columns 111, as Figure 5 , Figure 6 andFigure 7 As shown, a guiding fit between the pressing member 1 and the base 2 can be achieved.

[0061] It should be noted that the guiding column 111 can be a cylinder or a prism, and the cross-section of the guiding hole 211 matches the cross-section of the guiding column 111, and the purpose of the present application can be achieved in both cases.

[0062] In some embodiments of the present application, please refer to Figure 1 , Figure 2 , Figure 5 , Figure 8 , Figure 9 and Figure 14 , the pressing structure further includes a connecting member 3. The connecting member 3 is connected to the base 2. A stress surface 12 for abutting against the connecting member 3 is provided on the pressing member 1. A pressing force is applied to the stress surface 12 through the connecting member 3, so that the pressing member 1 and the to-be-installed member 4 are pressed on the base 2. At the same time, through the connection between the connecting member 3 and the base 2, a fixed connection between the pressing member 1 and the base 2 is realized, so as to form a stable accommodating space between the pressing member 1 and the base 2 to fix the to-be-installed member 4.

[0063] In the above embodiment, if the pressing member 1 and the base 2 are fixed through multiple connecting members 3, the area on the pressing member 1 for cooperating with the connecting members 3 will be too large, resulting in a larger size of the pressing member 1, which will increase the installation area required for a single to-be-installed member 4, and further reduce the number of components that can be installed on the base 2, which is not conducive to realizing the integrated arrangement of multiple to-be-installed members 4.

[0064] To solve the above problems, in some embodiments of the present application, please refer to Figures 1 to 4 and Figure 14 , the stress surface 12 is located at one end of the pressing member 1, and the stress surface 12 is inclined in the second direction. The first direction faces one side of the base 2, and the second direction faces the other side of the base 2. When the connecting member 3 contacts the stress surface 12 at one end of the pressing member 1, an inclined acting force perpendicular to the second direction will be applied to the stress surface 12. Both the inclined acting force and the first direction face the same side of the base 2, and can push the pressing member 1 to move in the first direction to achieve pressing against the base 2. The connection between the pressing member 1 and the base 2 can be realized through only one connecting member 3, which is beneficial to reducing the number of components in the pressing structure and the size of the pressing member 1, and can also avoid the situation that the other end of the pressing member 1 tilts when only the connecting member 3 is provided at one end of the pressing member 1, which is beneficial to ensuring that the pressing member 1 applies a uniform pressing force to the to-be-installed member 4.

[0065] In some embodiments of the present application, please refer to Figure 4 , Figure 6 and Figure 7, the first direction is lower left, and the second direction is lower right. When the connecting member 3 contacts the force-receiving surface 12, an inclined force acting towards the lower left will be applied to the force-receiving surface 12. This inclined force and the first direction both face the left side of the base 2, and can push the pressing member 1 towards the lower left in Figure 4 and Figure 14 the lower left, so as to apply a downward and leftward pressing force to the to-be-installed member 4, realizing the two-way pressing of the to-be-installed member 4 in the vertical and horizontal directions. Figure 7 and Figure 14 In some embodiments of the present application, please refer to

[0066] On Figure 4 , Figure 8 and Figure 14 , the connecting member 3 is provided with a force-applying surface 31 that is matched with the force-receiving surface 12, which can realize the fitting between the force-applying surface 31 and the force-receiving surface 12, thereby realizing the fitting and position fixation between the connecting member 3 and the pressing member 1.

[0067] It should be noted that the force-receiving surface 12 and the force-applying surface 31 can be inclined surfaces or conical surfaces, both of which can achieve the purpose of the present application.

[0068] In some embodiments of the present application, when the connecting member 3 has a threaded section 32, the threaded fit with the base 2 needs to be realized by rotating and tightening. Therefore, the force-applying surface 31 needs to be arranged along the circumferential direction of the connecting member 3, so as to synchronously realize the contact fit between the force-applying surface 31 and the force-receiving surface 12 during the rotation of the connecting member 3. At this time, the force-applying surface 31 is a conical surface, as shown in Figure 8 .

[0069] In some embodiments of the present application, the included angle between the axis of the guide post 111 in the first guiding portion 11 and the vertical direction is α, and the included angle between the axis of the guide hole 211 in the second guiding portion 21 and the vertical direction is β, and the values of α and β are the same. Preferably, the values of α and β range from 15° to 30°. This is because when the values of α and β are less than 15°, the horizontal component force applied by the pressing member 1 to the to-be-installed member 4 is small, and the pressing of the to-be-installed member 4 in the horizontal direction cannot be realized. Moreover, when the connecting member 3 is only arranged at one end of the pressing member 1, it is easy to cause uneven force application of the pressing member 1 to the to-be-installed member 4. When the values of α and β are greater than 30°, it will cause the horizontal component force applied by the pressing member 1 to the to-be-installed member 4 to be too large, and it is easy to cause the to-be-installed member 4 to be squeezed and broken.

[0070] In some embodiments of the present application, the angle between the force-bearing surface 12 and the vertical direction is θ, and the angle between the force-applying surface 31 and the axis of the connecting member 3 is γ. At this time, the axis of the connecting member 3 is parallel to the vertical direction, and the values ​​of θ and γ are the same. Preferably, the value range of θ and γ is 30° to 60°. This is because, when the values ​​of θ and γ are less than 30°, the clamping force applied by the connecting member 3 to the clamping member 1 is small, which causes the clamping force applied by the clamping member 1 to the installation member 4 to be small, and the installation member 4 cannot be clamped; when the values ​​of θ and γ are greater than 60°, the clamping force applied by the connecting member 3 to the clamping member 1 is large, which easily causes the clamping member 1 to crush the installation member 4, and also easily causes the end of the clamping member 1 away from the connecting member 3 to tilt.

[0071] In some embodiments of this application, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 14 The pressing member 1 is also provided with a mounting portion 13 connected to the force-bearing surface 12 , and the connecting member 3 is inserted into the mounting portion 13 , so that the connecting member 3 passes through the pressing member 1 and is fixedly connected with the base 2 .

[0072] In some embodiments of this application, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 14 The mounting portion 13 is located outside the accommodation space, which can prevent the to-be-installed component 4 in the accommodation space from affecting the assembly of the connecting component 3, and there is no need to set a through hole matching the connecting component 3 on the to-be-installed component 4. The mounting portion 13 includes a U-shaped groove or a strip hole, which can allow the clamping component 1 and the connecting component 3 to have a relative movement margin in the horizontal direction. When the clamping component 1 is pushed by the tilting force and moves along the first direction, it will move relative to the connecting component 3 in the horizontal direction. The setting of the U-shaped groove or the strip hole can prevent the connecting component 3 from hindering the clamping component 1 from moving in the first direction. Figure 14 Horizontal movement occurs on the left side.

[0073] As a specific embodiment of the present application, a U-shaped groove is provided at one end of the clamping member 1, and the opening of the U-shaped groove is arranged toward the connecting member 3, so that the connecting member 3 can be embedded in the U-shaped groove. During the clamping process, the U-shaped groove and the connecting member 3 can undergo relative movement in the horizontal direction.

[0074] In some embodiments of the present application, the material of the clamping member 1 is plastic, rubber or metal. In order to facilitate the manufacture of the first guide portion 11, the force-bearing surface 12 and the mounting portion 13, it is preferred to use plastic raw materials for integral injection molding, which is conducive to ensuring the connection reliability between the first guide portion 11, the force-bearing surface 12 and the mounting portion 13 and the clamping member body, and can also improve the production efficiency of the clamping member 1.

[0075] In some embodiments of this application, please refer toFigure 1 , Figure 5 , Figure 8 , Figure 9 and Figure 14 , the connection between the connecting member 3 and the base 2 is a detachable connection, which facilitates the maintenance and replacement of the component to be installed 4 in the accommodation space; the base 2 is provided with a connection portion 22 that matches the connecting member 3. Specifically, the connection between the connecting member 3 and the base 2 can be a threaded connection or a snap connection. However, when a threaded connection is adopted between the connecting member 3 and the base 2, the pressure exerted by the connecting member 3 on the pressing member 1 gradually increases with the tightening degree, which is beneficial to gradually pressing the pressing member 1 against the component to be installed 4. The snap connection will achieve instant pressing during snapping and cannot achieve a gradual increase in the pressing force. Therefore, it is preferred that the connection between the connecting member 3 and the base 2 is a threaded connection. At this time, one end of the connecting member 3 has a threaded section 32, and the connection portion 22 is a threaded hole that matches the threaded section 32.

[0076] Please refer to Figures 1 to 15 , in the second aspect of the embodiment of the present application, a circuit board assembly is provided, which includes the pressing structure in the above embodiment, and further includes a heat dissipation member and a component to be installed 4. The component to be installed 4 is an electronic component (such as a MOS transistor, etc.), and heat will be generated during the working process, resulting in a temperature rise. If the electronic component overheats, the electronic component cannot work properly. The component to be installed 4 is arranged in the accommodation space, and the pressing structure can be used to install electronic components such as MOS transistors in the circuit board assembly. The heat dissipation member is configured as the base 2, which can not only be fixed to the pressing member 1 and the connecting member 3, but also be in contact with the component to be installed 4 (i.e., the electronic component) to achieve heat conduction, thereby reducing the temperature of the component to be installed 4 and ensuring the normal operation of the component to be installed 4, as Figure 1 , Figure 11 and Figure 14 shown.

[0077] It should be noted that by pressing the electronic component evenly against the heat dissipation plate body 25 of the base 2 through the pressing member 1, the close contact and heat conduction between the electronic component and the heat dissipation plate body 25 can be effectively ensured, the temperature of the electronic component during operation can be effectively reduced, and the reliability of the electronic component can be improved. Multiple pressing members 1 can be arranged on the heat dissipation plate body 25 of the base 2 (i.e., the heat dissipation member) to install multiple electronic components. The heat dissipation of multiple electronic components can be achieved through the same heat dissipation plate body 25, which is beneficial to reducing the number of components of the circuit board assembly. At this time, it is preferred that the pressing member 1 is made of a plastic with better heat resistance to avoid deformation of the pressing member 1 due to the temperature emitted by the electronic component for a long time.

[0078] Since the heat dissipation component (i.e., the base 2) is often made of metal materials with good heat dissipation performance, such as copper, aluminum alloy, etc., when the electronic components are not plastic encapsulated, electrical conduction is likely to occur between the base 2 and the electronic components in the metal encapsulated state, which is not conducive to the normal operation of the electronic components. Therefore, in some embodiments of the present application, please refer to Figure 13 , Figure 14 and Figure 15 , the circuit board assembly further includes an insulating member 5. The insulating member 5 is clamped between the member to be installed 4 and the base 2 and is located inside the accommodation space. It can be used to insulate the member to be installed 4 from the metal base 2, prevent electrical conduction from occurring after direct contact between the base 2 and the member to be installed 4, affect the normal operation of the member to be installed 4, and is conducive to ensuring electrical safety.

[0079] The insulating member 5 is made of a heat-conducting material to avoid the setting of the insulating member 5 affecting the heat conduction between the member to be installed 4 and the base 2. Specifically, the insulating member 5 is an insulating gasket and can be made of materials such as silicone (i.e., silica gel), and has good insulation, voltage resistance, and heat conductivity.

[0080] In some embodiments of the present application, in order to improve the heat conduction effect between the member to be installed 4 and the base 2, heat-conducting silicone grease is provided between the insulating member 5 and the base 2 and between the insulating member 5 and the member to be installed 4, which can make the heat of the member to be installed 4 be transferred to the base 2 (i.e., the heat dissipation component) faster and more effectively.

[0081] In some embodiments of the present application, please refer to Figure 5 , Figure 9 , Figure 13 and Figure 14 , the base 2 is provided with a limiting portion 23 that matches the insulating member 5 to prevent the insulating member 5 from shifting on the base 2 when bearing the acting force of the member to be installed 4.

[0082] Since during the pressing process, the pressing member 1 moves in the first direction, which will cause the member to be installed 4 and the insulating member 5 to bear an inclined pressing force. To achieve horizontal limiting of the insulating member 5, the limiting portion 23 includes a limiting groove 231 and a limiting boss 232 provided on one side of the limiting groove 231. Specifically, when the first direction is the lower left, the limiting boss 232 is located on the left side of the limiting groove 231, which can limit the movement of the insulating member 5 and the member to be installed 4 towards the left side of the base 2.

[0083] In some embodiments of the present application, please refer to Figure 3 , Figure 4 , Figure 10 , Figure 14 and Figure 15, in order to achieve the abutment and limitation of the to-be-installed part 4, the pressing part 1 is provided with a first abutting part 14 matching the to-be-installed part 4 for abutting against one side of the to-be-installed part 4, and the insulating part 5 is provided with a second abutting part 51 matching the to-be-installed part 4 for abutting against the other side of the to-be-installed part 4, so as to achieve the all-round pressing of the to-be-installed part 4.

[0084] Specifically, the surface of the to-be-installed part 4 is provided with a first positioning surface 41, a second positioning surface 42, a third positioning surface 43 and a fourth positioning surface 45. Among them, the first positioning surface 41, the second positioning surface 42 and the third positioning surface 43 are connected in a Z shape and are located at the upper part of the to-be-installed part 4; the fourth positioning surface 45 is an L-shaped positioning surface and is located at the lower part of the to-be-installed part 4. The first abutting part 14 includes a first abutting surface 141, a second abutting surface 142 and a third abutting surface 143, and the first abutting surface 141, the second abutting surface 142 and the third abutting surface 143 are connected in a Z shape. Among them, the first abutting surface 141 fits with the first positioning surface 41, and the second abutting surface 142 fits with the second positioning surface 42, so that the pressing part 1 can apply a downward pressing force to the to-be-installed part 4, and the third abutting surface 143 fits with the third positioning surface 43, so that the pressing part 1 can apply a leftward pressing force to the to-be-installed part 4, as Figure 14 shown. The second abutting part 51 of the insulating part 5 fits with the fourth positioning surface 45 and can apply a rightward supporting force to the to-be-installed part 4. The contact surface 52 of the insulating part 5 fits with the bottom of the to-be-installed part 4 and can apply an upward supporting force to the to-be-installed part 4, so as to achieve the all-round pressing of the to-be-installed part 4.

[0085] It should be noted that when the to-be-installed part 4 is metal-encapsulated and there is a risk of electrical conduction with the base 2, an insulating part 5 can be provided between the base 2 and the to-be-installed part 4; when the to-be-installed part 4 is plastic-encapsulated, there is no need to provide an insulating part 5. The to-be-installed part 4 is arranged in the limiting groove 231, and the limiting boss 232 is made to fit with the fourth positioning surface 45, and the to-be-installed part 4 can be directly horizontally abutted and limited by the limiting boss 232.

[0086] In some embodiments of the present application, please refer to Figure 11 、 Figure 12 and Figure 14 , the circuit board assembly further includes a circuit board 6. The to-be-installed part 4 is electrically connected to the circuit board 6, and the signal connection between the to-be-installed part 4 and other components in the circuit board 6 can be realized through the circuit board 6. The heat dissipation part is connected to the circuit board 6, and the pressing part 1 and the to-be-installed part 4 are clamped between the heat dissipation part and the circuit board 6, and the fixing arrangement of the pressing structure and the to-be-installed part 4 on the circuit board 6 can be realized.

[0087] In some embodiments of the present application, a fixing portion 24 is further provided on the heat dissipation plate body 25 of the base 2 for realizing the connection with the circuit board 6. Specifically, the fixing portion 24 includes a plurality of fixing posts, and the circuit board 6 has connection holes matching the fixing posts, such as Figure 11 and Figure 12 shown.

[0088] In some embodiments of the present application, the fixing post includes a first column body 241 and a second column body 242 arranged coaxially, and the diameter of the first column body 241 is smaller than that of the second column body 242. The size of the connection hole matches the size of the first column body 241. The first column body 241 is located at the end of the fixing post away from the heat dissipation plate body 25. When the first column body 241 is embedded in the connection hole of the circuit board 6, the presence of the second column body 242 makes there be a spacing between the heat dissipation plate body 25 and the circuit board 6, and the size of the spacing is the same as the length of the second column body 242 protruding from the heat dissipation plate body 25, such as Figure 13 and Figure 14 shown, which can provide an installation space for the pressing member 1, the member to be installed 4 and the insulating member 5.

[0089] In some embodiments of the present application, a plurality of through holes are further provided on the circuit board 6, which can facilitate the pins 44 of the member to be installed 4 and the connecting member 3 to pass through the circuit board 6, so as to facilitate the assembly of the member to be installed 4 and the connecting member 3, such as Figure 12 and Figure 14 shown.

[0090] A third aspect of the embodiments of the present application provides an electrical device, including the circuit board assembly in the above embodiments. The operation control of the electrical device can be realized through the circuit board assembly. Due to the characteristics of stable installation of electronic components and good heat dissipation performance of the circuit board assembly, the electrical device of the present application can operate continuously and normally, which is beneficial to improving the reliability and service life of the electrical device.

[0091] Please refer to Figures 1 to 15 , in some embodiments of the present application, the assembly process of the above circuit board assembly is as follows:

[0092] Step 1: Apply a layer of thermal grease in the limiting portion 23 of the base 2, place the insulating member 5 in the limiting portion 23, and then apply a layer of thermal grease on the insulating member 5;

[0093] Step 2: Place the member to be installed 4 on the insulating member 5, so that the fourth positioning surface 45 is attached to the second abutting portion 51 of the insulating member 5;

[0094] Step 3: Mate the first guiding portion 11 of the pressing member 1 with the second guiding portion 21 of the base 2, so that the first abutting portion 14 of the pressing member 1 abuts against the component to be installed 4; connect the connecting member 3 to the base 2, so that the force - applying surface 31 of the connecting member 3 presses tightly against the force - receiving surface 12 of the pressing member 1. During the tightening process of the connecting member 3, the connecting member 3 moves downward, and its force - applying surface 31 applies an inclined acting force F towards the lower left to the force - receiving surface 12. Under the action of F, the pressing member 1 has a tendency to move leftward and downward. At the same time, under the restricting action of the four guiding columns 111 on the pressing member 1 and the limiting bosses 232 of the base 2, the pressing member 1 stops after moving a certain distance leftward, realizing the horizontal pressing of the component to be installed 4, and the downward movement of the pressing member 1 can realize the vertical pressing of the component to be installed 4 and make the component to be installed 4 fully fit the insulating member 5. Figure 4 and Figure 14 Step 4: Connect the fixing portion 24 of the base 2 to the circuit board 6, so that the pins 44 of the component to be installed 4 extend out of the circuit board 6.

[0095] It should be noted that the pressing member 1 of the present application uniformly applies force to the component to be installed 4 through the first abutting surface 141 and the second abutting surface 142, avoiding the problem of pressure concentration that occurs in the prior art when directly passing screws through the holes on the component to be installed 4 (such as MOS transistors) for fastening installation, achieving the effect of uniformly pressing the component to be installed 4 without damage.

[0096] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or their combinations. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that alternative or additional steps may be used.

[0097]

[0098] ​Although terms such as first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another region, layer, or section. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms do not imply an order or sequence when used in this document. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0099] The above description is only a specific implementation manner of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A pressing structure, characterized in that, Comprising: A pressing member (1); A base (2), the pressing member (1) is disposed opposite to the base (2), and a receiving space for a member to be installed (4) is formed between the pressing member (1) and the base (2); a first guiding portion (11) is provided on a side of the pressing member (1) close to the base (2), a second guiding portion (21) is provided on a side of the base (2) close to the pressing member (1), and the first guiding portion (11) and the second guiding portion (21) are in concave-convex fit.

2. The pressing structure according to claim 1, wherein Both the first guiding portion (11) and the second guiding portion (21) are inclined in a first direction.

3. The pressing structure according to claim 1 or 2, characterized in that, The first guiding portion (11) includes a plurality of guiding columns (111), and the plurality of guiding columns (111) are symmetrically disposed on the pressing member (1).

4. The pressing structure according to claim 2, characterized in that, It further includes a connecting member (3), the connecting member (3) is connected to the base (2), and a stress surface (12) for abutting against the connecting member (3) is provided on the pressing member (1).

5. The pressing structure according to claim 4, wherein The stress surface (12) is located at one end of the pressing member (1), the stress surface (12) is inclined in a second direction, the first direction faces one side of the base (2), and the second direction faces the other side of the base (2).

6. The pressing structure according to claim 5, wherein The connecting member (3) has a force-applying surface (31) that is matched with the stress surface (12).

7. The pressing structure according to claim 6, characterized in that, The force-applying surface (31) is a conical surface.

8. The pressing structure according to any one of claims 4 to 7, characterized in that, The pressing member (1) further has a mounting portion (13) connected to the stress surface (12), and the connecting member (3) is inserted into the mounting portion (13).

9. The pressing structure according to claim 8, wherein, The mounting portion (13) is located outside the receiving space, and the mounting portion (13) includes a U-shaped groove or a strip-shaped hole.

10. The pressing structure according to any one of claims 4 to 7, characterized in that, The connection between the connecting member (3) and the base (2) is detachable, and a connecting portion (22) matched with the connecting member (3) is provided on the base (2).

11. A circuit board assembly, comprising the pressing structure according to any one of claims 1 to 10, characterized in that, It further includes a heat dissipation member and the member to be installed (4), the heat dissipation member is configured as the base (2), the member to be installed (4) is an electronic component, and the member to be installed (4) is disposed in the receiving space.

12. The circuit board assembly according to claim 11, wherein, It further includes an insulating member (5), and the insulating member (5) is clamped between the member to be installed (4) and the base (2).

13. The circuit board assembly according to claim 12, wherein A limiting portion (23) matched with the insulating member (5) is provided on the base (2).

14. The circuit board assembly according to claim 12, wherein, A first abutting portion (14) matched with the member to be installed (4) is provided on the pressing member (1), and a second abutting portion (51) matched with the member to be installed (4) is provided on the insulating member (5).

15. The circuit board assembly according to any one of claims 11 to 14, characterized in that, It further includes a circuit board (6), the member to be installed (4) is electrically connected to the circuit board (6); the heat dissipation member is connected to the circuit board (6), and the pressing member (1) and the member to be installed (4) are clamped between the heat dissipation member and the circuit board (6).

16. An electrical device, characterized in that, Including the circuit board assembly according to any one of claims 11 to 15.

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