Transistor mounting assembly, printed circuit board assembly and electronic equipment

Abstract

The utility model relates to the technical field of transistors, in particular to a transistor mounting assembly, a printed circuit board assembly and electronic equipment. The transistor installation assembly is used for being installed between a printed circuit board and a radiator and comprises a connecting piece. The connecting piece comprises a first buckle and two clamping parts, and the two clamping parts are arranged in the first direction; the clamping part comprises a first clamping structure and a second clamping structure which are oppositely arranged in a spaced mode in the first direction. A clamping space is formed between the first clamping structure and the second clamping structure. In the first direction, the first clamping structures of the two clamping parts are arranged adjacently. The first clamping structure comprises a first clamping part and a second clamping part, and the first clamping part tightly presses the transistor on the second clamping structure; the second clamping part is of a rigid structure; in one clamping part, the first clamping part is closer to the side face, located in the clamping space, of the second clamping structure than the second clamping part in the first direction.

Description

Technical Field

[0001] This application relates to the field of transistor technology, and more particularly to a transistor mounting assembly, a printed circuit board assembly, and an electronic device. Background Technology

[0002] Currently, transistors are increasingly widely used in power supply applications, and their operating power is also increasing. Technicians typically use heat sinks to dissipate heat from transistors. When mounting a transistor, it is attached to the surface of a heat sink to transfer the heat generated by the transistor to the heat sink.

[0003] To ensure proper fit between the heatsink and the transistor, the transistor is typically placed on a printed circuit board (PCB) during installation, then flipped over along with the PCB and mounted onto the heatsink. During this process, the transistor is prone to falling off the PCB. This can damage the transistor, affecting the yield rate and production cost of the final product; furthermore, it makes transistor installation inconvenient, impacting overall production efficiency. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a transistor mounting assembly, a printed circuit board assembly, and an electronic device.

[0005] In a first aspect, the present invention provides a transistor mounting assembly, which is used for mounting between a printed circuit board and a heat sink, and includes a connector;

[0006] The connector includes a first buckle and two mounting portions, which are arranged along a first direction.

[0007] The first buckle and the mounting portion are respectively disposed on opposite sides of the connector, and the first buckle is used to connect to the circuit board;

[0008] The mounting portion includes a first clamping structure and a second clamping structure that are spaced apart from each other along the first direction; a mounting space is formed between the first clamping structure and the second clamping structure, and the mounting space is used to mount transistors; along the first direction, the first clamping structures of the two mounting portions are arranged adjacent to each other.

[0009] The first clamping structure includes a first clamping part and a second clamping part. The first clamping part is used to press the transistor onto the second clamping structure when the transistor is inserted into the mounting space.

[0010] The second clamping part is a rigid structure; in one of the clamping parts, along the first direction, the first clamping part is closer to the side of the second clamping structure located in the clamping space than the second clamping part.

[0011] Optionally, the connector includes a first housing and a second housing, which are fixedly connected.

[0012] Optionally, the first clamping part is disposed on the first housing, and the second clamping structure and the second clamping part are disposed on the second housing; the second housing is provided with the first through hole, and the first clamping part is inserted into the first through hole.

[0013] Optionally, the transistor mounting assembly includes fasteners for securing the second housing to the heat sink.

[0014] Optionally, the transistor mounting assembly includes a fastener gasket;

[0015] The fastener washer has a second through hole, through which the fastener passes and presses the fastener washer against the second housing.

[0016] Optionally, the second housing includes a receiving groove;

[0017] The fastener gasket is disposed in the receiving groove, and a third through hole is provided at the bottom of the receiving groove. The fastener passes through the second through hole and the third through hole.

[0018] Optionally, the fastener gasket is an elastic gasket with a flat structure; the bottom of the receiving groove has a raised structure that contacts the fastener gasket, so that the fastener gasket and the bottom of the receiving groove are arranged at intervals.

[0019] Optionally, the first housing is provided with a frame that protrudes toward the second housing; the second housing is provided with a groove whose depth direction is the same as the protrusion direction of the frame; the frame is inserted into the groove.

[0020] Optionally, the first housing is provided with a second buckle, and the second housing is provided with a second connecting hole, the second buckle engaging with the second connecting hole.

[0021] Optionally, the second buckle is provided with a first inclined surface, and the edge of the second connecting hole is provided with a second inclined surface. The inclination direction of the first inclined surface and the inclination direction of the second inclined surface are both arranged at an acute angle to the extension direction of the second buckle.

[0022] Optionally, the first housing is provided with a cylindrical structure; the cylindrical wall of the cylindrical structure is inclined in the direction away from the first housing, and the diameter of the opening of the cylindrical structure connected to the first housing is larger than the diameter of the opening of the cylindrical structure away from the first housing; the first buckles are provided in pairs and are respectively provided on both sides of the cylindrical structure.

[0023] Secondly, embodiments of the present invention provide a printed circuit board assembly, the printed circuit board assembly including any of the transistor mounting assemblies described above.

[0024] Optionally, the printed circuit board assembly includes a heat sink, a transistor, and an insulating thermally conductive pad;

[0025] The heat sink is fixedly connected to the connector, the transistor is mounted in the mounting space, and the insulating thermally conductive pad is sandwiched between the heat sink and the transistor.

[0026] Optionally, the heat sink has a pad mounting groove on the side facing the transistor mounting assembly, and the insulating thermally conductive pad is mounted in the pad mounting groove.

[0027] Thirdly, embodiments of the present invention provide an electronic device, the electronic device including any of the printed circuit board assemblies described above.

[0028] In some implementations of this application, the transistor mounting assembly includes a connector. The connector includes a first latch, a first clamping structure, and a second clamping structure.

[0029] During installation, the transistor mounting assembly can be snapped onto the printed circuit board using the first clip, and the transistor can be secured within the mounting space formed by the relatively spaced first and second clamping structures. The first clamping structure includes a first clamping part and a second clamping part. The first clamping part provides an elastic force to the transistor towards the second clamping structure when the transistor is inserted into the mounting space, thus securing the transistor against the second clamping structure. The second clamping part is a rigid structure; when the transistor moves towards the first clamping part, the second clamping part can constrain the transistor's movement, preventing the first clamping part from undergoing plastic deformation or breakage due to transistor compression. Along the first direction, the first clamping structures of the two mounting parts are arranged adjacent to each other, with the second clamping structures of the two mounting parts positioned outside the two first clamping structures, or in other words, the two first clamping structures are positioned between the two second clamping structures in the first direction. Thus, during use and transportation, the second clamping structures can provide protection for the first clamping structures and prevent them from undergoing plastic deformation or breakage due to external influences.

[0030] With the transistor mounting assembly in place, the transistor is less likely to fall off the printed circuit board when it is flipped along with the board, thus reducing the probability of damage from a fall. This ensures a high yield rate for the final product and avoids the additional production costs associated with transistor damage. Furthermore, this design facilitates transistor installation and improves overall production efficiency. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0032] Figure 1 This is a cross-sectional schematic diagram of the transistor mounting assembly in some embodiments of this application;

[0033] Figure 2 This is an exploded view of a printed circuit board assembly in some embodiments of this application;

[0034] Figure 3 This is a cross-sectional schematic diagram of a printed circuit board assembly in some embodiments of this application;

[0035] Figure 4 yes Figure 2 Exploded view of the transistor mounting assembly;

[0036] Figure 5 yes Figure 2 A cross-sectional view of the transistor mounting assembly;

[0037] Figure 6 yes Figure 5 A magnified view of part A in the middle;

[0038] Figure 7 This is a schematic diagram illustrating the process of mounting transistor mounting components onto a printed circuit board.

[0039] Figure 8 This is a schematic diagram illustrating the process of mounting a transistor card onto a transistor mounting assembly;

[0040] Figure 9 yes Figure 8 A schematic diagram of the structure after installation;

[0041] Figure 10 yes Figure 9 A schematic diagram of the flipped structure;

[0042] Figure 11 yes Figure 2 Axonometric view of the radiator and frame assembly;

[0043] Reference numerals: 1. Connector; 11. First buckle; 12. Mounting part; 121. First clamping structure; 1211. First clamping part; 1212. Second clamping part; 122. Second clamping structure; 123. Mounting space; 13. First housing; 131. Frame; 132. Second buckle; 1321. First inclined surface; 133. First base; 134. Cylindrical structure; 135. Fourth through hole; 14. Second housing; 141. 1. First through hole; 142. Receiving groove; 143. Third through hole; 144. Protruding structure; 145. Groove; 146. Second connecting hole; 1461. Second inclined surface; 147. Second base; 2. Printed circuit board; 21. First connecting hole; 3. Heat sink; 31. Gasket mounting groove; 4. Fastener; 5. Transistor; 6. Insulating thermally conductive gasket; 7. Frame; 8. Cover plate; 9. Fastener gasket; 91. Second through hole; X-First direction. Detailed Implementation

[0044] The embodiments of this utility model will now be described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0045] With the booming development of the power supply industry, transistors are increasingly widely used in power supplies, and their operating power is also increasing. This increase in transistor operating power means a corresponding increase in heat generation. If this heat cannot be dissipated in time, the internal temperature of the device will rise, affecting the lifespan of other components. Therefore, existing transistors require the addition of heat sinks. Heat sinks can transfer the heat dissipated by the transistor to the outside of the device through heat exchange with the external medium, thereby reducing the internal temperature. This helps extend the lifespan of internal components and, consequently, the lifespan of the entire device.

[0046] When installing transistors, a good fit between the transistor and the heatsink is essential to ensure effective heat dissipation. To prevent transistor deformation during soldering and other processes, technicians typically mount the transistor onto a printed circuit board (PCB) first, then flip the PCB and transistor together and mount them onto the heatsink. After ensuring a good fit, the transistor's leads are finally soldered onto the PCB. However, because the transistor is not fixed to the PCB during the flipping process, it is prone to falling off. This can damage the transistor, affecting the yield rate and production cost of the final product; it also hinders transistor installation, impacting overall production efficiency.

[0047] To prevent transistors from falling off the printed circuit board during rotation, this invention provides a transistor mounting assembly that pre-secures the transistors to the printed circuit board to prevent them from falling off during rotation.

[0048] For reference Figures 1 to 5 Specifically, the transistor mounting assembly described in this embodiment of the invention is used for mounting between the printed circuit board 2 and the heat sink 3 of the device, and includes a connector 1. See also... Figure 1 As shown, the connector 1 includes a first latch 11 and two mounting portions 12, which are arranged along a first direction X. The first latch 11 and the mounting portions 12 are respectively arranged on opposite sides of the connector 1. The first latch 11 is used to connect with the circuit board 2, and the mounting portions 12 are used to mount the transistor 5.

[0049] In some embodiments of this invention, the first latch 11 is a cantilever structure extending from the body of the connector 1 away from the connector 1, with a raised bulge at its extended end. The printed circuit board 2 has a first connecting hole 21 for engaging with the first latch 11. During installation, the first latch 11 can extend into the first connecting hole 21. During this process, the first latch 11 is forced to deform, causing its extended end to shift, thus preventing interference between the bulge on the first latch 11 and the edge of the first connecting hole 21. After installation, the first latch 11 resets, and the bulge at its extended end engages with the edge of the first connecting hole 21 away from the heat sink 3. Under the constraint of the first latch 11, the connector 1 cannot detach from the printed circuit board 2 in the direction towards the heat sink 3. Due to the interference between the body of the connector 1 and the edge of the first connecting hole 21, the connector 1 also cannot detach from the printed circuit board 2 in the direction away from the heat sink 3. In other words, the connector 1 is constrained on the printed circuit board 2. During the flipping of the printed circuit board 2, the connector 1 will not detach from the printed circuit board 2. There is still a certain amount of movement between the first latch 11 and the printed circuit board 2. The connector 1 can move towards the heat sink 3 until the protrusion on the first latch 11 interferes with the edge of the first connecting hole 21; it can also move away from the heat sink 3 until it interferes with the first connecting hole 21. This allows for adjustment of the position of the transistor 5 relative to the heat sink 3 during installation, ensuring the transistor 5 fits the heat sink 3 as closely as possible.

[0050] For reference Figure 1 As shown, the mounting portion 12 specifically includes a first clamping structure 121 and a second clamping structure 122 arranged at a distance from each other along a first direction X. The gap between the first clamping structure 121 and the second clamping structure 122 is the mounting space 123 for mounting the transistor 5. Along the direction in which the first clamping structure 121 and the second clamping structure 122 are arranged at a distance from each other, that is, along the first direction X, the first clamping structures 121 of the two mounting portions 12 are arranged adjacent to each other. In other words, the two first clamping structures 121 are arranged between the two second clamping structures 122 in the first direction X. Thus, during use and transportation, the second clamping structure 122 can provide protection for the first clamping structure 121 and prevent the first clamping structure 121 from undergoing plastic deformation or breakage due to external influences.

[0051] The first clamping structure 121 includes a first clamping portion 1211 and a second clamping portion 1212. The first clamping portion 1211 can be made of an elastic material. When the transistor 5 is inserted into the mounting space 123, the first clamping portion 1211 deforms under the pressure of the transistor 5, causing its end to displace away from the second clamping structure 122 and providing an elastic reaction force to the transistor 5, thus pressing the transistor 5 firmly onto the second clamping structure 122.

[0052] The second clamping part 1212 is a rigid structure; in the direction in which the first clamping structure 121 and the second clamping structure 122 are relatively spaced apart, the first clamping part 1211 is closer to the second clamping structure 122 than the second clamping part 1212. The direction in which the first clamping structure 121 and the second clamping structure 122 are relatively spaced apart is... Figure 5 In the first direction X. In other words, in the direction in which the first clamping structure 121 and the second clamping structure 122 are arranged at a relative interval, the end face of the first clamping part 1211 facing the second clamping structure 122 is closer to the second clamping structure 122 than the end face of the second clamping part 1212 facing the second clamping structure 122. Let L1 be the distance from the end face of the first clamping part 1211 facing the second clamping structure 122 to the wall of the second clamping structure 122, and let L2 be the distance from the end face of the second clamping part 1212 facing the second clamping structure 122 to the wall of the second clamping structure 122; see reference. Figure 1 and Figure 5 As shown, L1 < L2. When transistor 5 moves toward the first clamping part 1211, the second clamping part 1212 can constrain the movement of transistor 5, preventing the first clamping part 1211 from being plastically deformed or broken due to the pressure of transistor 5.

[0053] In some embodiments of this utility model, the first clamping part 1211 is also a cantilever structure, extending away from the main body of the connector 1, and having a raised bulge at its extended end. The second clamping structure 122 can be a plate-like structure extending in the same direction as the first clamping part 1211. The second clamping structure 122 can also be a plate-like structure spaced apart from the first clamping structure 121. The mounting space 123 is the gap between the first clamping structure 121 and the second clamping structure 122. When the transistor 5 is inserted into the mounting space 123, the transistor 5 first pushes open the first clamping part 1211, causing the first clamping part 1211 to undergo elastic deformation. The extended end of the first clamping part 1211 moves away from the second clamping structure 122 to prevent the bulge on the first clamping part 1211 from interfering with the insertion of the transistor 5. After transistor 5 is inserted into place, the protrusion on the first clamping part 1211 provides an elastic reaction force to transistor 5 toward the second clamping structure 122, and presses transistor 5 against the second clamping structure 122. Under the influence of friction, transistor 5 is fixedly installed in the mounting space 123.

[0054] During installation, you can refer to Figure 7 The mounting components can be movably connected to the circuit board 2 via the first clip 11. (See reference...) Figure 8 and Figure 9 Transistor 5 can be mounted within the mounting space 123 of the mounting component. (See reference...) Figure 10With the mounting components in place, transistor 5 is less likely to fall off circuit board 2 when it is flipped together, thus reducing the probability of damage from a fall. This ensures a high yield rate for the final product and avoids additional production costs associated with transistor 5 damage. Furthermore, this design facilitates the installation of transistor 5, improving overall production efficiency.

[0055] In the direction in which the first clamping structure 121 and the second clamping structure 122 are spaced apart, the first clamping portion 1211 is closer to the second clamping structure 122 than the second clamping portion 1212. Since the second clamping portion 1212 is a rigid structure, when installing the transistor 5, the movement of the transistor 5 toward the first clamping portion 1211 is easily interfered with by the second clamping portion 1212, thus preventing excessive deflection of the first clamping portion 1211. This avoids plastic deformation or even breakage of the first clamping portion 1211 due to excessive deflection, thereby ensuring the reliability of the snap-fit ​​connection between the mounting assembly and the transistor 5. To ensure the rigidity and structural strength of the second clamping portion 1212, in some embodiments of this invention, a rib extends from the side of the second clamping portion 1212 facing away from the second clamping structure 122.

[0056] For reference Figure 4 , Figure 5 In some embodiments of this utility model, the connector 1 includes a first housing 13 and a second housing 14 that are fixedly connected to each other. In other words, the connector 1 is formed in two separate parts. The first housing 13 and the second housing 14 can be fixedly connected by structural fitting, screws, bolts, rivets, adhesives, etc. The separate forming method of the connector 1 can reduce the processing difficulty of the connector 1, thereby reducing the processing cost of the connector 1. Of course, in some embodiments, the connector 1 can also be formed in one piece.

[0057] For reference Figure 4 , Figure 5 In some embodiments of this utility model, the first housing 13 specifically includes a first base 133, a first clamping part 1211, and a first buckle 11. The first base 133 is the structure on the first housing 13 that provides the foundation for the first clamping part 1211, the first buckle 11, and other structures. To save installation space and prevent excessive spacing between the printed circuit board 2 and the heat sink 3, the first base 133 can be a flat plate structure. This also reduces the processing difficulty and cost of the first housing 13. The first buckle 11 is fixed to the side of the first base 133 facing away from the second housing 14 so as to engage with the printed circuit board 2. The first clamping part 1211 is located on the side of the first base 133 facing the second housing 14.

[0058] The second housing 14 specifically includes a second base 147, a second clamping structure 122, and a second clamping portion 1212. The second base 147 is the structure on the second housing 14 that provides the foundation for the second clamping structure 122. A first through hole 141 is provided on the second base 147. The first through hole 141 can be a rectangular through hole, which is positioned on the second base 147 corresponding to the position of the first clamping portion 1211 on the first housing 13, and extends through the second base 147 along its thickness direction. The second clamping structure 122 is a plate-like structure, which is provided at the end of the second base 147 and extends in the same direction as the first clamping portion 1211. In other words, the end of the second base 147 is provided with a plate-like structure extending away from the first housing 13, and this plate-like structure is the second clamping structure 122 on the second housing 14.

[0059] After the second housing 14 is fixedly connected to the first housing 13, the first clamping part 1211 is inserted into the first through hole 141, and the extended end of the first clamping part 1211 protrudes from the first through hole 141. At this time, there is a large gap between the second clamping structure 122 and the part of the first clamping part 1211 that protrudes from the first through hole 141. This gap is the mounting space 123 on the transistor mounting assembly described in this embodiment of the present invention for fixing and mounting the transistor 5. Since the first clamping part 1211 and the second clamping structure 122 are respectively provided on the first housing 13 and the second housing 14, the first clamping part 1211 and the second clamping structure 122 can be processed and formed separately during processing. This reduces the processing difficulty of the first clamping part 1211 and the second clamping structure 122, and is also more conducive to ensuring the dimensional accuracy and structural strength of the first clamping part 1211 and the second clamping structure 122.

[0060] In some embodiments of this utility model, the first base 133 is specifically a rectangular plate structure, that is, the projection of the first base 133 in its thickness direction is a rectangle, and the length direction of the rectangle is arranged along the direction in which the first clamping structure 121 and the second clamping structure 122 are relatively spaced apart. Two pairs of first clamping parts 1211 are provided, and are respectively arranged at the middle of the two sides of the first base 133 in the width direction. The first clamping parts 1211 in the same pair are spaced apart along the length direction of the first base 133, and the convex directions of their protrusions are opposite to each other. The first clamping parts 1211 extend along the thickness direction of the first base 133. Correspondingly, the second base 147 is also a rectangular plate structure, that is, the projection of the second base 147 in its thickness direction is also a rectangle, and the length direction of the rectangle is arranged along the direction in which the first clamping structure 121 and the second clamping structure 122 are relatively spaced apart. A reinforcing rib can be provided on the side of the second base 147 facing away from the first housing 13 to ensure the structural strength of the second base 147. The second base 147 has four first through holes 141 corresponding to the first clamping portions 1211. Connected plate-like structures extend along the thickness direction of the four sides of the second base 147. Two plate-like structures in the length direction of the second base 147 serve as second clamping structures 122, forming a mounting space 123 with two adjacent first clamping portions 1211, thus providing two mounting spaces 123 for mounting the transistor 5 on the transistor mounting assembly. An clearance notch is provided on one of the plate-like structures in the width direction of the second base 147 to allow clearance for the leads of the transistor 5.

[0061] In some embodiments of this utility model, the other structures on the first housing 13 and the second housing 14 are basically symmetrically designed. Specifically, the two pairs of first clamping portions 1211 are arranged symmetrically with respect to the center plane of the first base 133 in the width direction, and any pair of first clamping portions 1211 is arranged symmetrically with respect to the center plane of the first base 133 in the length direction. The four first through holes 141 corresponding to the first clamping portions 1211 on the second base 147 are arranged symmetrically with respect to the center plane of the second base 147 in the width direction, with two first through holes 141 on each symmetrical side. The two first through holes 141 on any symmetrical side are also arranged symmetrically with respect to the center plane of the second base 147 in the length direction. The clearance notch is arranged symmetrically with respect to the center plane of the second base 147 in the length direction. This facilitates the processing of the first housing 13 and the second housing 14, thereby improving processing efficiency.

[0062] The transistor mounting assembly based on the above structure has good compatibility with transistor 5. For example, for transistor mounting assemblies that adapt to TO247 transistor 5, the above structure can be compatible with mounting TO247 transistor 5 with different structures such as those with holes and without holes; those that are plastic-encapsulated and semi-plastic-encapsulated; and those that are two-pin, three-pin, and four-pin.

[0063] For reference Figure 4 , Figure 5 In some embodiments of this invention, the transistor mounting assembly includes a fastener 4, which secures the second housing 14 to the heat sink 3. The fastener 4 can be a screw, bolt, rivet, etc. For example, when a screw is used as the fastener 4, the screw head can be pressed against the second housing 14, and the threaded portion of the screw can be screwed into the threaded hole of the heat sink 3. By tightening the screw, the second housing 14 can be fixed to the surface of the heat sink 3.

[0064] For reference Figure 4 , Figure 5 In some embodiments of this invention, the transistor mounting assembly further includes a fastener pad 9. During installation, the transistor 5 is mounted on the transistor mounting assembly, which is then mounted on the printed circuit board 2. The transistor 5 and the transistor mounting assembly are then flipped together with the printed circuit board 2 and placed on the heat sink 3. The fastener pad 9 of the transistor mounting assembly is secured to the heat sink 3 using fasteners 4 such as screws, bolts, and rivets. At this time, the fastener pad 9 can press against the second housing 14, bringing the second housing 14 as close as possible to the heat sink 3, thereby pressing the transistor 5 as tightly as possible against the heat sink 3. This ensures that the transistor 5 is as close to the heat sink 3 as possible, thus ensuring that the heat dissipated by the transistor 5 is effectively transferred to the heat sink 3. The fastener pad 9 disperses the clamping force applied to the second housing 14 by the fasteners 4, preventing localized crushing of the second housing 14; it also ensures that the clamping force applied to the second housing 14 by the fasteners 4 is evenly distributed on the second housing 14, preventing the second housing 14 from warping due to excessive localized force.

[0065] For reference Figure 4 , Figure 5 In some embodiments of this utility model, the second housing 14 includes a receiving groove 142. A fastener washer 9 is disposed in the receiving groove 142, and a third through hole 143 for the fastener 4 to pass through is provided at the bottom of the receiving groove 142. A second through hole 91 is correspondingly provided on the fastener washer 9. During installation, the fastener washer 9 can be fixedly connected to the heat sink 3 by fasteners 4 such as screws, bolts, and rivets, and the fastener washer 9 is pressed against the second housing 14. The fastener washer 9 is installed in the receiving groove 142 of the second housing 14, which can avoid the fastener washer 9 occupying space outside the second housing 14, thus facilitating the miniaturization design of the transistor mounting assembly, saving installation space, and avoiding excessive spacing between the printed circuit board 2 and the heat sink 3.

[0066] In some embodiments of this utility model, the receiving groove 142 is specifically located at the center of the second base 147 of the second housing 14, with the opening of the receiving groove 142 facing the first housing 13. A circular third through hole 143 is provided on the bottom of the receiving groove 142, and the extending direction of the third through hole 143 is consistent with the depth direction of the receiving groove 142. After the fastener washer 9 is installed into the receiving groove 142, the fastener washer 9 is fastened to the heat sink 3 by screws. At this time, the screw head is pressed against the fastener washer 9, the screw body passes through the third through hole 143, and the threaded part of the screw is screwed into the screw hole on the heat sink 3.

[0067] For reference Figure 4 , Figure 5 In some embodiments of this utility model, the fastener washer 9 can be an elastic washer, and the fastener washer 9 has a flat structure. Correspondingly, the bottom of the receiving groove 142 is provided with a protruding structure 144. Specifically, the fastener washer 9 can be a rectangular sheet structure with a second through hole 91 for the fastener 4 to pass through in its center. The groove shape of the receiving groove 142 is also rectangular, that is, the cross-sectional projection of the receiving groove 142 in its depth direction is rectangular. The protruding structure 144 is a long strip structure raised on the bottom of the receiving groove 142, and its length direction is preferably arranged along the width direction of the receiving groove 142. During installation, the fastener washer 9 is placed in the receiving groove 142, and the two end sections of the fastener washer 9 contact the protruding structure 144 respectively. The protruding structure 144 supports the fastener washer 9 and makes the fastener washer 9 and the bottom of the receiving groove 142 spaced apart. The fastener 4 passes through the second through hole 91 and the third through hole 143 on the bottom of the receiving groove 142 and is fixed to the heat sink 3, so that the two end sections of the fastener washer 9 are pressed against the protruding structure 144. At this time, the fastener washer 9 undergoes bending deformation towards the bottom of the receiving groove 142 and provides elastic force along the axial direction of the fastener 4 to the fastener 4 to prevent the fastener 4 from loosening. No matter how the fastener washer 9 deforms, the part of the second housing 14 that bears the clamping force is always the protruding structure 144. In other words, this ensures that the force point on the second housing 14 remains unchanged, and the transistor 5 mounted on the transistor mounting assembly will not lift due to the change of the force point position, thereby ensuring that the transistor 5 and the heat sink 3 always have a good fit. It is conceivable that in some embodiments of the present invention, the fastener washer 9 can also be an arched spring. The arched spring has a straight middle section and two end sections that are raised relative to the middle section. During installation, the end section of the arched spring is pressed directly against the bottom of the receiving groove 142, and the middle section is connected to the heat sink 3 via fastener 4. Alternatively, a rigid washer can be used for the fastener washer 9.

[0068] For reference Figure 4 , Figure 5In some embodiments of this utility model, a frame 131 is provided on the side of the first housing 13 facing the second housing 14, and the frame 131 protrudes in the direction towards the second housing 14. A groove 145 is provided on the side of the second housing 14 facing the first housing 13, and the depth direction of the groove is arranged in the same direction as the protrusion direction of the frame. During installation, the frame 131 and the groove 145 are inserted and fitted together. This increases the creepage distance between the transistor 5 and the printed circuit board 2, and the design of the frame 131 also increases the structural strength of the first housing 13. In order to meet the safety distance requirements, in the prior art, a no-displacement zone is generally set on the printed circuit board 2 corresponding to the transistor 5. That is, no device or connection is allowed to be placed in this area on the printed circuit board 2. This will cause the printed circuit board 2 to be designed to be larger, resulting in a larger space occupation and production cost of the printed circuit board 2. The prior art also adds insulating paper between the transistor 5 and the printed circuit board 2, but this will increase the workload of installing the transistor 5 and is not conducive to improving assembly efficiency. A frame 131 is provided on the first housing 13, and a groove 145 is provided on the second housing 14. The frame 131 is inserted into the groove 145. This design can avoid setting a restricted area on the printed circuit board 2, which helps to reduce the space occupied by the printed circuit board 2 and the production cost. On the other hand, it can also avoid setting insulating paper between the transistor 5 and the printed circuit board 2, simplifying the assembly process of installing the transistor 5 and improving the installation efficiency of the transistor 5.

[0069] For reference Figure 4 , Figure 5In some embodiments of this utility model, a second buckle 132 is provided on the first housing 13, and a second connecting hole 146 is provided on the second housing 14. The second buckle 132 and the second connecting hole 146 are engaged to achieve a fixed connection between the first housing 13 and the second housing 14. The second buckle 132 is a cantilever structure. This cantilever structure extends toward the second housing 14 and has a raised bulge at its extended end. The second connecting hole 146 is provided on the second base 147 of the second housing 14, and can specifically be a rectangular through hole. The through direction of the second connecting hole 146 is along the thickness direction of the second base 147. During installation, the second buckle 132 can extend into the second connecting hole 146. During this process, the second buckle 132 deforms, and its extended end is displaced to avoid interference between the bulge on the second buckle 132 and the edge of the second connecting hole 146. After installation, the second latch 132 resets, and its extended end protrusion engages with the edge of the second connecting hole 146 facing away from the second housing 14. With the second latch 132 in place, the first housing 13 cannot detach from the second housing 14 in the direction facing away from the second housing 14, and due to the interference between the first base 133 and the second base 147, the first housing 13 cannot move towards the second housing 14. In other words, the first housing 13 is fixed to the second housing 14. When the second housing 14 is fixedly connected to the heat sink 3 by the fastener 4, the first housing 13 is simultaneously fixed to the heat sink 3.

[0070] For reference Figure 6 In some embodiments of this utility model, a first inclined surface 1321 is provided on the second buckle 132, and a second inclined surface 1461 is provided at the edge of the second connecting hole 146. The inclination directions of the first inclined surface 1321 and the second inclined surface 1461 are both arranged at acute angles to the extension direction of the second buckle 132. The first inclined surface 1321 and the second inclined surface 1461 can fit together when the second buckle 132 is engaged with the second connecting hole 146, and guide the second buckle 132 to undergo elastic deformation. Specifically, the first inclined surface 1321 is provided on the raised bulge of the second buckle 132. When the second buckle 132 is inserted into the second connecting hole 146, the first inclined surface 1321 presses against the second inclined surface 1461. At this time, the reaction force applied by the second inclined surface 1461 to the first inclined surface 1321 can drive the second buckle 132 to undergo elastic deformation, so as to avoid interference with the edge of the second connecting hole 146. After the second latch 132 is inserted into place, the second latch 132 resets and its raised bulge stops at the edge of the second connecting hole 146 opposite to the insertion direction of the second latch 132.

[0071] For reference Figure 10In some embodiments of this utility model, a cylindrical structure 134 is provided on the side of the first base 133 facing the printed circuit board 2, and the cylindrical wall of the cylindrical structure 134 is inclined in the direction away from the first housing 13. The diameter of the opening of the cylindrical structure 134 connected to the first housing 13 is larger than the diameter of the opening of the cylindrical structure 134 facing away from the first housing 13. In other words, the cylindrical wall of the cylindrical structure 134 is inclined, and the diameter of the opening of the cylindrical structure 134 facing the printed circuit board 2 is smaller than the diameter of the opening of the cylindrical structure 134 facing the heat sink 3. The first buckles 11 are arranged in pairs and are respectively arranged on both sides of the cylindrical structure 134. Correspondingly, the printed circuit board 2 is provided with an irregular hole as a first connecting hole 21. During installation, the cylindrical structure 134 and the first buckles 11 are simultaneously inserted into the irregular hole, and the raised protrusion on the first buckle 11 blocks the edge of the irregular hole to prevent the first housing 13 from detaching from the printed circuit board 2. The cylindrical structure 134 guides the engagement between the first housing 13 and the printed circuit board 2, while also constraining the sway of the first latch 11, preventing it from undergoing plastic deformation or breakage due to excessive sway. The cylindrical structure 134 and the first latches 11 on both sides can also prevent relative rotation of the first housing 13 relative to the printed circuit board 2 by engaging with irregularly shaped holes on the printed circuit board 2. Since the first housing 13 is fixedly connected to the second housing 14, the second housing 14 will also not rotate relative to the printed circuit board 2.

[0072] In some embodiments of this utility model, a fourth through hole 135 is provided on the first base 133 corresponding to the cavity position of the cylindrical structure 134. The fourth through hole 135 penetrates the first base 133 in the thickness direction and is positioned opposite to the third through hole 143 on the second housing 14. During installation, a fastener 4 can be directly inserted into the third through hole 143 through the fourth through hole 135 so that the second housing 14 and the fastener gasket 9 can be mounted on the heat sink 3 by means of the fastener 4.

[0073] Secondly, this utility model embodiment provides a printed circuit board assembly, which includes a transistor mounting assembly as described above. Specifically, the printed circuit board assembly includes a printed circuit board 2 and a transistor mounting assembly, the transistor mounting assembly being snapped onto the printed circuit board 2 via a first latch 11. The mounting space 123 on the transistor mounting assembly can accommodate a transistor 5, so that the transistor 5 will not fall off when the printed circuit board 2 is rotated during the assembly of the printed circuit board assembly. (See reference...) Figure 2 and Figure 11The printed circuit board assembly can be installed within a frame 7, with the side of the frame 7 facing away from the heat sink 3 sealed by a cover plate 8. The side of the frame 7 facing the heat sink 3 has an opening to allow heat exchange between the heat sink 3 and the transistor 5. The frame can be securely mounted to the heat sink using screws, bolts, rivets, or other structural components. During installation, a sealing strip can be used to seal the surfaces of the frame and the heat sink to achieve dust and water resistance. The sealing rating is preferably IP65 or IP55.

[0074] In some embodiments of this invention, the printed circuit board assembly includes a heat sink 3, a transistor 5, and an insulating thermally conductive pad 6. Specifically, the heat sink 3 is a metal structure with multiple fins on its side facing away from the printed circuit board 2. The heat sink 3 is fixedly connected to the connector 1 by fasteners 4. The transistor 5 is fitted into the mounting space 123, and the insulating thermally conductive pad 6 is sandwiched between the heat sink 3 and the transistor 5. The insulating thermally conductive pad 6 can specifically be a ceramic pad. Thus, after the printed circuit board assembly is assembled, the transistor 5 and the heat sink 3 maintain good thermal conductivity while also providing good insulation protection.

[0075] For reference Figure 2 and Figure 11 In some embodiments of this invention, the heat sink 3 has a pad mounting groove 31 on the side facing the transistor mounting assembly, and the insulating thermally conductive pad 6 is fixedly installed in the pad mounting groove 31. This provides good positioning for the insulating thermally conductive pad 6, preventing it from shifting during assembly, thereby significantly improving production efficiency and yield. Simultaneously, because the insulating thermally conductive pad 6 can be well maintained between the transistor 5 and the heat sink 3, arcing short circuits are less likely to occur between the transistor 5 and the heat sink 3.

[0076] During installation, first, the transistor mounting assembly is mounted on the printed circuit board 2, and then the transistor 5 is mounted in the mounting space 123 of the transistor mounting assembly. Next, the printed circuit board 2 is flipped so that the side with the transistor facing the heat sink 3, and the printed circuit board is fixed in place within the frame 7 using screws or similar means. Because the transistor mounting assembly is mounted on the printed circuit board 2, the position of the transistor mounting assembly can be adjusted to ensure that the transistor 5 mounted on it fits the heat sink as closely as possible. Finally, the transistor mounting assembly is mounted on the heat sink 3 using fasteners 4, and the cover plate 8 is closed onto the frame 7 to complete the installation.

[0077] Thirdly, embodiments of this utility model provide an electronic device, which includes a printed circuit board assembly as described above. Specifically, the electronic device can be a power supply device, a control device, or even a consumer electronics product such as a laptop computer or digital camera.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0079] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or at least two of the features. In the description of this utility model, unless otherwise stated, "at least two" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0080] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "left", "right", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0081] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or at least two embodiments or examples.

[0083] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A transistor mounting assembly for mounting between a printed circuit board (2) and a heat sink (3), characterized in that, Includes connector (1); The connector (1) includes a first buckle (11) and two mounting parts (12), which are arranged along a first direction (X); The first buckle (11) and the mounting part (12) are respectively disposed on opposite sides of the connector (1), and the first buckle (11) is used to connect to the circuit board (2); The mounting portion (12) includes a first clamping structure (121) and a second clamping structure (122) arranged at a distance from each other along the first direction (X); a mounting space (123) is formed between the first clamping structure (121) and the second clamping structure (122), the mounting space being used to mount the transistor (5), and the first clamping structures (121) of the two mounting portions (12) are arranged adjacent to each other along the first direction (X); The first clamping structure (121) includes a first clamping part (1211) and a second clamping part (1212). The first clamping part (1211) is used to press the transistor (5) onto the second clamping structure (122) when the transistor (5) is inserted into the mounting space (123). The second clamping part (1212) is a rigid structure; in one of the clamping parts (12), along the first direction (X), the first clamping part (1211) is closer to the side of the second clamping structure (122) located in the clamping space (123) than the second clamping part (1212).

2. The transistor mounting assembly according to claim 1, characterized in that, The connector (1) includes a first housing (13) and a second housing (14), which are fixedly connected.

3. The transistor mounting assembly according to claim 2, characterized in that, The first clamping part (1211) is disposed on the first housing (13), and the second clamping structure (122) and the second clamping part (1212) are disposed on the second housing (14); the second housing (14) is provided with the first through hole (141), and the first clamping part (1211) is inserted into the first through hole (141).

4. The transistor mounting assembly according to claim 2, characterized in that, The transistor mounting assembly includes a fastener (4) for securing the second housing (14) to the heat sink (3).

5. The transistor mounting assembly according to claim 4, characterized in that, The transistor mounting assembly includes a fastener gasket (9); The fastener gasket (9) is provided with a second through hole (91), and the fastener (4) passes through the second through hole (91) and presses the fastener gasket (9) onto the second housing (14).

6. The transistor mounting assembly according to claim 5, characterized in that, The second housing (14) includes a receiving groove (142); The fastener gasket (9) is disposed in the receiving groove (142), and a third through hole (143) is provided at the bottom of the receiving groove (142). The fastener (4) passes through the second through hole (91) and the third through hole (143).

7. The transistor mounting assembly according to claim 6, characterized in that, The fastener gasket (9) is an elastic gasket with a flat structure; the bottom of the receiving groove (142) has a raised structure (144) that contacts the fastener gasket (9) so that the fastener gasket (9) and the bottom of the receiving groove (142) are arranged at intervals.

8. The transistor mounting assembly according to any one of claims 2-7, characterized in that, The first housing (13) is provided with a frame (131), which protrudes in the direction toward the second housing (14); the second housing (14) is provided with a groove (145), the depth direction of which is in the same direction as the protrusion direction of the frame (131); the frame (131) and the groove (145) are inserted into each other.

9. The transistor mounting assembly according to any one of claims 2-7, characterized in that, The first housing (13) is provided with a second buckle (132), and the second housing (14) is provided with a second connecting hole (146). The second buckle (132) and the second connecting hole (146) are engaged in a locking fit.

10. The transistor mounting assembly according to claim 9, characterized in that, The second buckle (132) is provided with a first inclined surface (1321), and the second connecting hole (146) is provided with a second inclined surface (1461) at its edge. The inclination direction of the first inclined surface (1321) and the inclination direction of the second inclined surface (1461) are both arranged at an acute angle to the extension direction of the second buckle (132).

11. The transistor mounting assembly according to any one of claims 2-7, characterized in that, The first housing (13) is provided with a cylindrical structure (134); the cylindrical wall of the cylindrical structure (134) is inclined in the direction away from the first housing (13), and the diameter of the opening of the cylindrical structure (134) connected to the first housing (13) is greater than the diameter of the opening of the cylindrical structure (134) away from the first housing (13); the first buckles (11) are arranged in pairs and are respectively arranged on both sides of the cylindrical structure (134).

12. A printed circuit board assembly, characterized in that, The printed circuit board assembly includes the transistor mounting assembly according to any one of claims 1-11.

13. The printed circuit board assembly according to claim 12, characterized in that, The printed circuit board assembly includes a heat sink (3), a transistor (5), and an insulating thermally conductive pad (6); The heat sink (3) is fixedly connected to the connector (1), the transistor (5) is installed in the mounting space (123), and the insulating thermal pad (6) is sandwiched between the heat sink (3) and the transistor (5).

14. The printed circuit board assembly according to claim 13, characterized in that, The heat sink (3) has a gasket mounting groove (31) on the side facing the transistor mounting assembly, and the insulating thermally conductive gasket (6) is installed in the gasket mounting groove (31).

15. An electronic device, characterized in that, The electronic device includes the printed circuit board assembly according to any one of claims 12-14.

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