Connection structure of DC power socket and PCB

Abstract

The connection structure of the DC power socket and the PCB comprises the DC power socket and the PCB, the DC power socket comprises a plastic base, a matching structure is formed at the bottom of the plastic base, the matching structure comprises a plurality of supporting faces which are sequentially arranged in the height direction, and in any two adjacent supporting faces, the upper supporting face deviates towards the middle position away from the width direction of the plastic base compared with the lower supporting face. An avoiding space is formed at the lower part of the upper supporting surface on the side edge of the matching structure; the upper surface of the PCB is attached to one of the supporting surfaces, the plastic base is provided with a connecting piece extending downwards, the connecting piece is connected to the PCB so as to fix the plastic base to the PCB, and when the upper surface of the PCB is attached to the upper supporting surface of the two adjacent supporting surfaces, at least one part of the PCB is located in an avoiding space in the lower portion of the upper supporting surface. The single-specification DC power socket can adapt to different electronic products, and the application range of the DC power socket is enlarged.

Description

Technical Field

[0001] This invention relates to the field of power socket technology, and more specifically to a connection structure between a DC power socket and a PCB board. Background Technology

[0002] DC power sockets, as a type of low-voltage DC power supply access device, are widely used in various fields such as energy, consumer electronics, industrial control, and medical.

[0003] Different electronic products have different internal structures and spatial designs, requiring that the height of the DC power socket from the center of the PCB board to the DC power socket be different after the DC power socket is soldered onto the PCB board. This leads to the need to design DC power sockets in multiple different models and specifications to adapt to the requirements of different electronic products, resulting in a wide variety of DC power socket specifications and extremely limited applicability of a single DC power socket. Summary of the Invention

[0004] The main objective of this invention is to propose a connection structure between a DC power socket and a PCB board, so as to enable a single product specification to adapt to the installation distance requirements between the DC power socket and the PCB board of various electronic products.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The connection structure between the DC power socket and the PCB board is characterized by including a DC power socket and a PCB board.

[0007] The DC power socket includes a plastic base, and the bottom of the plastic base forms a mating structure. The mating structure includes multiple support surfaces arranged sequentially along the height direction. In any two adjacent support surfaces, the upper support surface is offset from the lower support surface towards the middle position away from the width direction of the plastic base, so as to form a clearance space on the side of the mating structure located below the upper support surface.

[0008] The PCB board is located below the plastic base. The upper surface of the PCB board is attached to one of the support surfaces. The plastic base is provided with a downwardly extending connector. The connector is connected to the PCB board to fix the plastic base to the PCB board. When the upper surface of the PCB board is attached to the upper support surface of two adjacent support surfaces, at least a part of the PCB board is located in the clearance space under the upper support surface.

[0009] Preferably, the bottom support surface extends from one side of the bottom of the mating structure to the other side, and the other support surfaces each include two surface units located on both sides of the mating structure. The PCB board is provided with a clearance groove extending downward from its upper surface. When the upper surface of the PCB board is attached to any other support surface other than the bottom support surface, at least a part of the mating structure is embedded in the clearance groove, so that the two surface units of the other support surface overlap on the upper surface of the PCB board at the positions located on both sides of the clearance groove.

[0010] Preferably, in any two adjacent support surfaces, the inner sides of the two units of the upper support surface are connected to the two outer sides of the lower support surface by a downwardly extending vertical wall, so as to form a series of stepped structures on both sides of the mating structure.

[0011] Preferably, the plastic base includes a top wall opposite to the mating structure and two side walls, the two side walls being connected between the two sides of the top wall and the top two sides of the mating structure, and the connectors include a top plate pressed on the top wall and two side plates pressed on the two side walls, each side plate having a solder foot extending downward for welding onto the PCB board.

[0012] Preferably, any two welding feet on both side walls are staggered from each other along the length of the plastic base.

[0013] Preferably, the DC power socket further includes a positive terminal, a negative terminal, and a switch detection terminal. The plastic base includes a front end face and a rear end face opposite to the front end face. The plastic base is provided with a slot extending from the front end face to the rear end face for plug insertion, and three mounting holes extending from the rear end face into the slot. The positive terminal, negative terminal, and switch detection terminal are respectively inserted into the three mounting holes. The positive terminal, negative terminal, and switch detection terminal each include a contact portion extending into the slot, a connecting portion embedded in the mounting hole, and a solder portion connected to the connecting portion and extending from the rear end of the mounting hole to the outside of the plastic base. The solder portion is soldered to the PCB board and is electrically conductive. The connecting portions of the positive terminal, negative terminal, and switch detection terminal are all flat and are on the same plane or parallel to each other.

[0014] Preferably, the mounting hole for mounting the positive terminal is located in the middle of the rear end face of the plastic base, and the other two mounting holes are located on both sides of the mounting hole for mounting the positive terminal. The contact portion of the positive terminal is cylindrical and extends into the radial middle of the slot. The negative terminal and the switch detection terminal each include a spring piece that bends upward and extends forward from the side of their respective connecting portion away from the connecting portion of the positive terminal. The contact portions of the negative terminal and the switch detection terminal are located on their respective spring pieces and placed at the periphery of the slot.

[0015] Preferably, the rear end of the spring is bent toward the positive terminal to form a sealing plate. The inner wall of the mounting hole for mounting the negative terminal and the switch detection terminal is provided with a stepped surface, and the sealing plate is pressed on the rear side of the stepped surface. The portion of the mounting hole for mounting the negative terminal and the switch detection terminal located on the rear side of the sealing plate, and the portion of the mounting hole for mounting the positive terminal located on the rear side of the contact portion of the positive terminal, together form a receiving space. The receiving space is filled with a sealant to block the rear ends of the three mounting holes.

[0016] Preferably, the connecting parts of the positive terminal, negative terminal, and switch detection terminal are all inserted into the seal, and the rear end of the connecting part passes through the seal and bends downward to form a welded part.

[0017] Preferably, the DC power socket further includes a positive terminal, a negative terminal, and a switch detection terminal. The plastic base includes a front face and a rear face opposite to the front face. The plastic base is provided with a slot extending from the front face to the rear face for inserting a plug. The positive terminal, negative terminal, and switch detection terminal are all embedded in a plastic connecting block. The plastic connecting block is snapped into the plastic base from the rear end of the plastic base and fixedly engaged with the plastic base, so that the contact portions of the front ends of the positive terminal, negative terminal, and switch detection terminal extend into the slot.

[0018] In this invention, multiple support surfaces of varying heights are provided on the mating structure at the bottom of the plastic base. When the plastic base is assembled with the PCB board, different support surfaces can be used to mate with the upper surface of the PCB board, resulting in different installation heights of the plastic base on the PCB board. Consequently, the center distance between the slots on the plastic base for inserting plugs and the height of the upper surface of the PCB board are different. The installation height of the plastic base can be adaptively changed according to actual installation requirements and different installation methods to adapt to the structural requirements of different electronic products. A single specification of DC power socket can be used to adapt to different electronic products, thus increasing the applicability of the DC power socket. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the structure of the plastic base;

[0022] Figures 3-6 This is a schematic diagram illustrating the usage state of the present invention;

[0023] Figure 7 for Figure 1 Schematic diagram of the machining process for the intermediate connector;

[0024] Figure 8 for Figure 1 Assembly diagram of the DC power socket;

[0025] Figure 9 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0026] Figure 10 This is a schematic diagram of the structure of Embodiment 3 of the present invention.

[0027] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0031] See Figure 1 , 2The diagram illustrates a connection structure between a DC power socket and a PCB board according to the present invention. The structure includes a DC power socket and a PCB board 90. The DC power socket includes a plastic base 10 and a connector 20. A mating structure 11 is formed at the bottom of the plastic base 10. The mating structure 11 includes support surfaces 111, 112, 113, and 114 arranged sequentially along the height direction (i.e., the Z-direction in the diagram). In any two adjacent support surfaces, the upper support surface is offset from the lower support surface by a position away from the center of the width direction (i.e., the Y-direction in the diagram) of the plastic base 10, creating a clearance space on the side of the mating structure 11 below the upper support surface. Taking adjacent support surfaces 112 and 113 as an example, support surface 113 is located above support surface 112, and the two are offset by a certain distance in the height direction. The distance between support surface 113 and the center of the width direction of the plastic base 10 is greater than the distance between support surface 112 and the center of the width direction of the plastic base 10. The distance between them, that is, the support surface 113 is offset outward from the middle position in the width direction of the plastic base 10 relative to the support surface 112, and a vertical wall 110 connects the support surfaces 112 and 113. Thus, the support surfaces 112, 113, and vertical wall 110 form a stepped structure on the side of the mating structure 11, and the part of the side of the mating structure 11 located below the support surface 113 forms a clearance space; the PCB board 90 is located below the plastic base 10. The upper surface 91 of board B 90 is attached to one of the support surfaces. The connector 20 is connected to the PCB board to fix the plastic base 10 to the PCB board. The upper surface 91 of PCB board 90 is attached to one of the support surfaces 111, 112, 113 and 114. When the upper surface 91 of PCB board 90 is attached to the upper support surface of any two adjacent support surfaces, at least a part of PCB board 90 is located in the clearance space under the upper support surface.

[0032] In a preferred embodiment, the lowermost support surface 111 extends from one side of the bottom of the mating structure 11 to the other side, that is, the bottom surface of the mating structure 11 forms the lowermost support surface 111. Apart from this support surface 111, all other support surfaces include two surface units located on either side of the mating structure 11, for example, see... Figure 3 As shown, the support surface 112 includes two surface units located on both sides of the mating structure 11. A vertical wall 110 connects the inner side of each surface unit to the two outer sides of the support surface 111. (See Figure 111 for details.) Figure 4 As shown, the support surface 113 includes two surface units located on both sides of the mating structure 11. A vertical wall 110 connects the inner side of each surface unit to the two outer sides of the support surface 112. (See also...) Figure 5As shown, the support surface 114 includes two surface units located on both sides of the mating structure 11. The inner sides of the two surface units are connected to the two outer sides of the support surface 113 by a vertical wall 110. In this way, a series of stepped structures are formed on both sides of the mating structure 11 through the support surface 111, support surface 112, support surface 113, support surface 114 and multiple vertical walls 110.

[0033] In the first embodiment of the present invention, a clearance groove 92 extending downward from its upper surface 91 is provided on the PCB board 90. This clearance groove 92 may extend through the upper surface 91 of the PCB board 90 to the lower surface of the PCB board 90, or, when the PCB board 90 is thick, it may be a clearance groove 92 that is recessed downward from its upper surface 91 and has a blind end at the lower end; the PCB board 90 mates with the aforementioned plastic base 10, such as... Figure 3 , 4 As shown in Figure 5, the upper surface of the PCB board 90 can abut against the aforementioned support surface 112, support surface 113, or support surface 114, and the clearance groove 92 of the PCB board 90 is used to avoid the bottom of the mating structure 11, so that at least a portion of the bottom of the mating structure 11 is embedded in the clearance groove 92. In this way, the plastic base 10 can achieve different mounting heights on the PCB board 90, for example, according to Figure 5 In the structure shown, the upper surface 91 of the PCB board 90 abuts against the highest support surface 114 in the mating structure 11, maximizing the portion of the mating structure 11 embedded in the clearance groove 92, thereby minimizing the mounting height of the plastic base 10 on the PCB board 90. The support surface is configured to include two surface units located on either side of the mating structure 11, in accordance with... Figure 3 , 4 When the plastic base 10 and the PCB board 90 are assembled together, the two surface units of the support surface overlap on the upper surface 91 of the PCB board 90 at the positions on both sides of the clearance groove 92, so that the PCB board 90 can support the plastic base 10 well.

[0034] When a relatively large mounting height of the plastic base 10 on the PCB board 90 is required, the plastic base 10 can be installed on the PCB board 90 at a position where the clearance groove 92 is not provided, or the clearance groove 92 can be omitted from the PCB board 90. Figure 6 As shown, the support surface 111 is directly attached to the upper surface 91 of the PCB board 90. At this time, the installation height of the plastic base 10 on the PCB board will be the highest.

[0035] In this invention, multiple support surfaces of varying heights are provided on the mating structure at the bottom of the plastic base 10. When the plastic base 10 is assembled with the PCB board 90, different support surfaces can be used to mate with the upper surface 91 of the PCB board 90, so that the installation height of the plastic base 10 on the PCB board is different. This results in the center distance of the slots on the plastic base 10 for inserting plugs being different from the height of the upper surface 91 of the PCB board 90. The installation height of the plastic base 10 can be adaptively changed according to the actual installation requirements and different installation methods to adapt to the structural requirements of different electronic products. A single specification of DC power socket can be used to adapt to different electronic products, thus increasing the applicability of the DC power socket.

[0036] It should be emphasized that the above embodiment of the present invention is only used as an example of setting four support surfaces on the mating structure 11 to illustrate the present invention. In other embodiments, the number of support surfaces can be set as needed.

[0037] See Figure 1 , 2 In the preferred structure of Embodiment 1, the plastic base 10 includes a top wall 101 opposite to the mating structure 11 and two side walls 104. The two side walls 104 are respectively connected to the two sides of the top wall 101 and the top two sides of the mating structure 11. The connector 20 is a sheet metal part, which includes a top plate 21 pressed on the top wall 101 and two side plates 22 extending downward from the two sides of the top plate 21. The two side plates 22 are respectively pressed on the two side walls 104. Each side plate 22 has at least one downward extending solder foot 23 at its bottom. The solder foot 23 is connected to the PCB board 90. In this way, the plastic base 10 is fixed to the PCB board 90 by the connector 20. In order to maintain stability, the side plate 22 can be snapped onto the side wall 104. For example, a snap-fit ​​boss can be provided on the side wall 104 and a snap-fit ​​groove can be provided on the side plate 22 for the snap-fit ​​boss to be inserted. Among the multiple welding feet 23 on the two side plates 22, any two adjacent welding feet 23 are staggered from each other along the length direction of the plastic base 10 (i.e., the X direction in the figure); Figure 7 This is a schematic diagram of the processing of connector 20. Connector 20 is cut from sheet metal by punching and then bent. Any two welding feet 23 are staggered along the X direction, allowing multiple punched connectors 20 to be arranged alternately on the sheet metal. For example, two welding feet 23 are provided on one side plate 22, and one welding foot 23 is provided on another side plate 22. Any two of the three welding feet 23 are staggered by a certain distance along the X direction. Figure 7 In the processing method shown, the punched parts of the connector 20 are arranged in an alternating pattern on the entire sheet metal, thereby making full use of the sheet metal, reducing scrap, and thus reducing waste of raw materials.

[0038] See Figure 8and combined Figure 1 , 2As shown, the DC power socket of the present invention further includes a positive terminal 30, a negative terminal 40, and a switch detection terminal 50. The plastic base 10 includes a front end face 102 and a rear end face 103 opposite to the front end face 102. A slot 12 extending from the front end face 102 toward the rear end face 103, a mounting hole 14 extending from the rear end face 103 into the slot 12, and two mounting holes 13 are provided on the plastic base 10. The positive terminal 30 passes through the mounting hole 14, and the negative terminal 40 and the switch detection terminal 50 pass through the two mounting holes 13 respectively. The positive terminal 30 includes a contact portion 31, a connecting portion 32, and a soldering portion 33. The connecting portion 32 is embedded in the mounting hole 14, the contact portion 31 is connected to the front side of the connecting portion 32 and extends into the slot 12, and the soldering portion 33 is connected to the rear side of the connecting portion 32 and extends from the rear end of the mounting hole 14 to the outside of the plastic base 10. The soldering portion 33 is soldered... The negative terminal 40 includes a connecting part 42, a contact part 411, and a soldering part 43. The connecting part 42 passes through one of the mounting holes 13. The contact part 411 is located on the front side of the connecting part 42 and is placed in the slot 12. The soldering part 43 is connected to the rear side of the connecting part 42 and extends from the rear end of the mounting hole 13 to the outside of the plastic base 10. The soldering part 43 is soldered to the PCB board 90 and is electrically connected to the PCB board 90. The switch detection terminal 50 includes a connecting part 52, a contact part 511, and a soldering part 53. The connecting part 52 passes through another mounting hole 13. The contact part 511 is located on the front side of the connecting part 52 and is placed in the slot 12. The soldering part 53 is connected to the rear side of the connecting part 52 and extends from the rear end of the mounting hole 13 to the outside of the plastic base 10. The soldering part 53 is soldered to the PCB board 90 and is electrically connected to the PCB board 90. Connecting portions 32, 42, and 52 are all flat and located in the same plane, or they are all flat and parallel to each other. By setting the connecting portions of the three terminals to be flat and located in the same plane or parallel to each other, the positive terminal 30, negative terminal 40, and switch detection terminal 50 can be punched and processed in one go using the same set of hardware molds, and can be assembled from the rear end of the plastic base 10 into the three mounting holes of the plastic base 10 in one go. The aforementioned slot 12 is used for plug insertion. After the plug is inserted into the slot 12, the contact portions 31, 411, and 511 respectively contact and conduct with the corresponding positions on the plug.The mounting hole 13 for mounting the positive terminal 30 is located in the middle of the rear end face 103 of the plastic base 10. Two mounting holes 14 are located on either side of the mounting hole 13. The contact portion 31 of the positive terminal 30 is cylindrical and located in the radial center of the slot. When the plug is inserted into the slot 12, the contact portion 31 can be inserted into the center hole of the plug. The negative terminal 40 includes a spring tab 41 connected to the front side of the connecting portion 42. The spring tab 41 is bent upwards and forwards from the side of the connecting portion 42 away from the connecting portion 32 of the positive terminal 30. The contact portion 411 is a bent portion provided on the spring piece 41 and located at the periphery of the slot 12. When the plug is inserted into the slot 12, the contact portion 411 contacts the outer edge of the plug. The switch detection terminal 50 includes a spring piece 51 connected to the front side of the connecting portion 52. The spring piece 51 is bent upward and extended forward from the side of the connecting portion 52 away from the positive terminal 30 connecting portion 32. The contact portion 511 is a bent portion provided on the spring piece 51 and located at the periphery of the slot 12. When the plug is inserted into the slot 12, the contact portion 511 contacts the outer edge of the plug.

[0039] In a preferred embodiment, the sealing and waterproofing can also be achieved by the structure on the terminal engaging with the plastic base. Specifically, a sealing plate 412 bent towards the positive terminal 30 is provided at the rear end of the spring 41. Similarly, a sealing plate 512 bent towards the positive terminal 30 is provided at the rear end of the spring 51. A stepped surface 131 is provided on the inner wall of the mounting hole 13. After the negative terminal 40 is inserted into the mounting hole 13 from back to front, the spring 41 is embedded in the slot 12, and the sealing plate 412 at the rear end of the spring 41 is pressed onto the stepped surface 131. Similarly, when the switch is detected... After the terminal 50 is inserted into the mounting hole 13 from right rear to front, the spring piece 51 is embedded into the slot 12. The sealing plate 512 located at the rear end of the spring piece 51 is pressed onto the stepped surface 131. Thus, the portions of the two mounting holes 13 located behind the sealing plates 412 and 512, and the portion of the mounting hole 14 located behind the contact portion 31 of the positive terminal 30, together form a receiving space. Waterproof material is filled into this receiving space, and the waterproof material is used to form a seal 60 at the openings of the two mounting holes 13 and 14 to seal the two mounting holes 13 and 14, thereby achieving a waterproof seal at the rear end of the plastic base 10.

[0040] To facilitate soldering of the aforementioned terminals to the PCB board 90, the connecting parts of the positive terminal 30, negative terminal 40, and switch detection terminal 50 are all inserted into the sealing member 60, and the rear side of the connecting parts all pass through the sealing member 60. The soldering part is formed by bending downward from the rear side of the connecting part passing through the sealing member 60.

[0041] like Figure 9As shown, this is a schematic diagram of the structure of Embodiment 2 of the present invention. The positive terminal 30, the negative terminal 40, and the switch detection terminal 50 are all embedded in a plastic connecting block. For example, the positive terminal 30, the negative terminal 40, the switch detection terminal 50 and the plastic connecting block can be integrated into a single structure by an in-mold embedding process. The plastic connecting block is inserted into the plastic base 10 from the rear end of the plastic base 10 and is fixedly engaged with the plastic base 10 so that the contact portions of the front ends of the positive terminal 30, the negative terminal 40 and the switch detection terminal 50 extend into the slot 12.

[0042] See Figure 10 As shown, this is a structural schematic diagram of Embodiment 3 of the present invention. In Embodiment 1 above, the present invention forms a row of stepped structures on both sides of the mating structure 11. In fact, in order to achieve different installation heights of the plastic base, as shown in Embodiment 3, only one row of stepped structures is set on one side of the mating structure. When the plastic base is connected to the PCB board, it is located at the edge of the PCB board or at the position where the PCB board has an avoidance groove. By using the different support surfaces of the PCB board and the stepped structure, different installation heights of the plastic base can be achieved.

[0043] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A connection structure between a DC power socket and a PCB board, characterized in that, Includes DC power sockets and PCB boards; The DC power socket includes a plastic base, and the bottom of the plastic base forms a mating structure. The mating structure includes multiple support surfaces arranged sequentially along the height direction. In any two adjacent support surfaces, the upper support surface is offset from the lower support surface towards the middle position away from the width direction of the plastic base, so as to form a clearance space on the side of the mating structure located below the upper support surface. The PCB board is located below the plastic base. The upper surface of the PCB board is attached to one of the support surfaces. The plastic base is provided with a downwardly extending connector. The connector is connected to the PCB board to fix the plastic base to the PCB board. When the upper surface of the PCB board is attached to the upper support surface of two adjacent support surfaces, at least a part of the PCB board is located in the clearance space under the upper support surface.

2. The connection structure between the DC power socket and the PCB board as described in claim 1, characterized in that, The bottom support surface extends from one side of the bottom of the mating structure to the other side. The other support surfaces each include two surface units located on both sides of the mating structure. The PCB board is provided with a clearance groove extending downward from its upper surface. When the upper surface of the PCB board is attached to any other support surface other than the bottom support surface, at least a part of the mating structure is embedded in the clearance groove, so that the two surface units of the other support surface overlap on the upper surface of the PCB board at the positions located on both sides of the clearance groove.

3. The connection structure between the DC power socket and the PCB board as described in claim 2, characterized in that, In any two adjacent support surfaces, the inner sides of the two units of the upper support surface are connected to the two outer sides of the lower support surface by a downwardly extending vertical wall, so as to form a series of stepped structures on both sides of the mating structure.

4. The connection structure between the DC power socket and the PCB board as described in claim 1, characterized in that, The plastic base includes a top wall opposite to the mating structure and two side walls. The two side walls are respectively connected between the two sides of the top wall and the top two sides of the mating structure. The connector includes a top plate pressed on the top wall and two side plates pressed on the two side walls respectively. Each side plate is provided with a solder foot extending downward to be soldered to the PCB board.

5. The connection structure between the DC power socket and the PCB board as described in claim 4, characterized in that, Any two welding feet on both sides are staggered from each other along the length of the plastic base.

6. The connection structure between the DC power socket and the PCB board as described in claim 1, characterized in that, The DC power socket also includes a positive terminal, a negative terminal, and a switch detection terminal. The plastic base includes a front face and a rear face opposite to the front face. The plastic base is provided with a slot extending from the front face to the rear face for plug insertion, and three mounting holes extending from the rear face into the slot. The positive terminal, negative terminal, and switch detection terminal are respectively inserted into the three mounting holes. The positive terminal, negative terminal, and switch detection terminal all include a contact portion extending into the slot, a connecting portion embedded in the mounting hole, and a solder portion connected to the connecting portion and extending from the rear end of the mounting hole to the outside of the plastic base. The solder portion is soldered to the PCB board and is electrically conductive. The connecting portions of the positive terminal, negative terminal, and switch detection terminal are all flat and are on the same plane or parallel to each other.

7. The connection structure between the DC power socket and the PCB board as described in claim 6, characterized in that, The mounting hole for mounting the positive terminal is located in the middle of the rear end face of the plastic base. The other two mounting holes are located on both sides of the mounting hole for mounting the positive terminal. The contact portion of the positive terminal is cylindrical and extends into the radial center of the slot. The negative terminal and the switch detection terminal each include a spring that bends upward and extends forward from the side of its respective connection portion away from the connection portion of the positive terminal. The contact portions of the negative terminal and the switch detection terminal are located on their respective springs and placed at the periphery of the slot.

8. The connection structure between the DC power socket and the PCB board as described in claim 7, characterized in that, The rear end of the spring is bent toward the positive terminal to form a sealing plate. The inner wall of the mounting hole for mounting the negative terminal and the switch detection terminal is provided with a stepped surface, and the sealing plate is pressed on the rear side of the stepped surface. The portion of the mounting hole for mounting the negative terminal and the switch detection terminal located on the rear side of the sealing plate, and the portion of the mounting hole for mounting the positive terminal located on the rear side of the contact portion of the positive terminal, together form a receiving space. The receiving space is filled with a sealant to block the rear ends of the three mounting holes.

9. The connection structure between the DC power socket and the PCB board as described in claim 8, characterized in that, The connection parts of the positive terminal, negative terminal, and switch detection terminal are all inserted into the seal, and the rear end of the connection part passes through the seal and bends downward to form a welded part.

10. The connection structure between the DC power socket and the PCB board as described in claim 1, characterized in that, The DC power socket also includes a positive terminal, a negative terminal, and a switch detection terminal. The plastic base includes a front face and a rear face opposite to the front face. The plastic base is provided with a slot extending from the front face to the rear face for the plug to be inserted. The positive terminal, negative terminal, and switch detection terminal are all embedded in a plastic connecting block. The plastic connecting block is snapped into the plastic base from the rear end of the plastic base and fixedly engaged with the plastic base so that the contact parts of the front end of the positive terminal, negative terminal, and switch detection terminal extend into the slot.

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