Power supply device

Abstract

This application belongs to the field of electrical equipment technology, and particularly relates to a power supply device, including a first electrode, a second electrode, a bracket, a circuit board, a relay, and a thermal fuse structure. The bracket includes a main body and a positioning part. Both the first and second electrodes are disposed in the main body. The circuit board is located on the bottom surface of the main body and is electrically connected to the first and second electrodes. The relay is fixedly disposed on the circuit board. The positioning part and the outer wall of the relay form a positioning space. The thermal fuse structure includes a temperature detection part and a connecting pin. The temperature detection part is installed in the positioning space, and the connecting pin is electrically connected to the circuit board. The temperature detection part is connected in series with the electromagnetic coil of the relay. This technical solution aims to solve the problem of inconsistent positions when manually attaching the thermal fuse structure to relays of different products, resulting in inconsistent critical temperature values ​​when triggering the thermal fuse structure between different products.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, and in particular relates to a power supply device. Background Technology

[0002] Electrical safety is closely related to people's daily lives. In order to ensure electrical safety, in addition to continuously strengthening people's awareness of electrical safety, it is also necessary to improve the electrical safety level of electrical equipment through physical means of mechanical design.

[0003] Relays are widely used in electrical equipment. A relay mainly consists of an electromagnetic coil and a contact switch. A small current in the electromagnetic coil controls the contact switch to conduct or disconnect a large current, thereby improving the electrical safety level of the equipment. During the operation of electrical equipment, the relay generates heat because both small and large currents operate simultaneously. The relay is considered the component that generates the most heat in the electrical equipment, meaning it experiences the greatest temperature rise. When an abnormal factor causes a current overload during equipment operation, the relay's temperature rise is most significant, making it the hottest component in the equipment. Therefore, a temperature-sensitive fuse mechanism detects whether the relay's temperature reaches or exceeds a preset critical temperature value. When the relay's temperature is below the preset critical temperature value, it continues to operate normally to ensure normal power supply. When the relay's temperature reaches or exceeds the preset critical temperature value, the temperature-sensitive fuse mechanism disconnects the small current in the relay's electromagnetic coil, thereby controlling the contact switch to disconnect the large current, protecting the electrical equipment and preventing overload damage or electrical safety accidents.

[0004] The outer wall of a relay does not experience uniform temperature rise across its entire surface; there are locations with the highest temperature rise. The thermal protection structure is positioned at these locations, and the preset critical temperature value is set based on this location. Currently, the thermal protection structure is manually applied with thermally conductive adhesive to bond and fix it to the outer wall of the relay, thus detecting the relay's temperature. However, manually applying the thermally conductive adhesive makes it difficult to maintain consistency in its application across different relay products. This results in variations in the temperature detection position of the thermal protection structure across different products, leading to inconsistent critical temperature values ​​when the thermal protection structure is triggered. This poor consistency poses a potential electrical safety hazard. Utility Model Content

[0005] The purpose of this application is to provide a power supply device that aims to solve the problem of inconsistent critical temperature values ​​when the thermal fuse structure is triggered between different products due to the inconsistent position of the thermal fuse structure being manually attached to the relays of different products.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a power supply device, comprising a first electrode, a second electrode, a bracket, a circuit board, a relay, and a temperature fuse structure. The bracket includes a main body and a positioning part disposed on the outer wall of the main body. Both the first and second electrodes are disposed on the main body. The circuit board is connected to the main body and located on the bottom surface of the main body. The circuit board is electrically connected to the first and second electrodes. The relay is fixedly disposed on the circuit board. The electromagnetic coil of the relay is electrically connected to the circuit board. The contact switch of the relay is connected in series with the first and second electrodes. The contact switch of the relay is used to control the first and second electrodes to be connected or disconnected. The positioning part extends toward the relay and forms a positioning space opposite to the outer wall of the relay. The temperature fuse structure includes a temperature detection part and a connection pin electrically connected to the temperature detection part. The temperature detection part is installed in the positioning space and sandwiched between the outer wall of the relay and the positioning part. The connection pin is electrically connected to the circuit board. The temperature detection part is connected in series with the electromagnetic coil of the relay.

[0007] In some embodiments, the positioning part includes a first positioning plate, a second positioning plate, and a third positioning plate. The surface of the first positioning plate is spaced apart from the outer wall of the relay. The second and third positioning plates are respectively connected to the two side edges of the first positioning plate. The first, second, and third positioning plates together with the outer wall of the relay form a positioning space with an insertion port.

[0008] In some embodiments, the surface of the first positioning plate facing the relay is provided with a plurality of anti-slip ribs spaced apart, and the anti-slip ribs abut against the temperature detection part.

[0009] In some embodiments, the bracket further includes at least two positioning posts connected to the bottom surface of the main body and passing through the circuit board.

[0010] In some embodiments, the bracket is a one-piece molded component.

[0011] In some embodiments, a thermally conductive adhesive layer is provided between the temperature sensing part and the outer wall of the relay.

[0012] In some embodiments, the power supply device can be a socket, the main body has a receiving groove, and the second electrode is disposed in the receiving groove; the power supply device also includes a grounding wire and a grounding bridge component, the grounding bridge component is fixedly installed on the main body, the grounding wire is connected to one of the positioning posts and passes through the circuit board, the grounding bridge component is electrically connected to the grounding wire, and the grounding bridge component has two spaced elastic arms that extend away from the main body. The two elastic arms are used to clamp the plug and electrically connect the plug to the grounding wire when the plug is inserted into the second electrode.

[0013] In some embodiments, the power supply device further includes a protection component, which includes a protection plate and a reset elastic member. The surface of the protection plate opposite to the main body is provided with two spaced protrusions and a through hole located between the two protrusions. Both protrusions are provided with inclined surfaces in the same direction. The protection plate is slidably disposed in a receiving groove. The protection plate has a first position that blocks the second electrode and a second position that avoids the second electrode. One end of the reset elastic member is connected to the main body and the other end is connected to the protection plate. The reset elastic member provides the protection plate with a spring force that causes it to slide back from the second position to the first position.

[0014] In some embodiments, the power supply device may be a plug; the power supply device further includes an adapter and a plug terminal, the adapter is provided with a snap-fit ​​arm, at least one positioning post is provided with a mounting groove, the snap-fit ​​arm is snap-fitted and fixed in the mounting groove, and the plug terminal is installed in the adapter and electrically connected to the first electrode end.

[0015] In some embodiments, the power supply device further includes a housing and a grounding wire. The bracket, circuit board, and adapter are all housed within the housing. The plug terminals extend out of the housing in a direction away from the circuit board. At least a portion of the grounding wire is attached to the snap-fit ​​arm and exposed outside the housing on the side wall of the housing. The grounding wire is used to electrically connect to the grounding wire of the socket when the plug terminals are plugged into the socket.

[0016] This application has at least the following beneficial effects:

[0017] In the power supply device provided in the embodiments of this application, the circuit board is connected to the main body of the bracket, the relay is fixedly mounted on the circuit board, the positioning part of the bracket extends toward the relay and forms a positioning space opposite to the outer wall of the relay, and the temperature detection part of the thermal fuse structure is installed in the positioning space. Thus, the position of the positioning space formed between the positioning part and the outer wall of the relay in different power supply devices is relatively fixed relative to the outer wall of the relay. That is, the detection position of the temperature detection part of the thermal fuse structure relative to the outer wall of the relay in different power supply devices can be kept consistent, so that the critical temperature value for triggering the temperature detection part of the thermal fuse structure is consistent among different power supply devices. The small current of the relay's electromagnetic coil controls the contact switch to conduct or disconnect the large current supplied to the first and second electrodes, improving the electrical safety level of the power supply device and effectively reducing potential electrical safety hazards. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, 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. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1A schematic diagram of the structure of the support for the power supply device in an embodiment of this application. Figure 1 ;

[0020] Figure 2 A schematic diagram of the structure of the support for the power supply device in an embodiment of this application. Figure 2 ;

[0021] Figure 3 A schematic diagram of the internal structure of the power supply device according to an embodiment of this application after the outer casing has been removed. Figure 1 ;

[0022] Figure 4 A schematic diagram of the internal structure of the power supply device according to an embodiment of this application after the outer casing has been removed. Figure 2 ;

[0023] Figure 5 The power supply device shown in this application is a product structure diagram of a socket and plug combined into one.

[0024] The figures in the diagram are labeled as follows:

[0025] 10. Bracket; 11. Main body; 111. Receiving groove; 12. Positioning part; 121. First positioning plate; 122. Second positioning plate; 123. Third positioning plate; 124. Anti-slip rib; 13. Positioning space; 131. Insertion port; 14. Positioning post; 141. Mounting groove;

[0026] 20. Circuit board;

[0027] 30. Relay;

[0028] 40. Temperature protection structure; 41. Temperature detection unit; 42. Connecting pins;

[0029] 50. Grounding wire;

[0030] 60. Grounding bridge component; 61. Flexible arm;

[0031] 70. Protective component; 71. Protective plate; 711. Protrusion; 712. Through hole; 713. Bevel; 72. Reset elastic element;

[0032] 80. Outer shell;

[0033] 91. Adapter socket; 92. Snap-in arm; 93. Plug-in terminal;

[0034] 101. First electrode; 102. Second electrode. Detailed Implementation

[0035] The embodiments of this application are described in detail below. 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 intended to explain this application, and should not be construed as limiting this application.

[0036] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] like Figures 1 to 4As shown, the power supply device provided in the embodiments of this application includes a first electrode 101, a second electrode 102, a bracket 10, a circuit board 20, a relay 30, and a thermal fuse structure 40. The bracket 10 includes a main body 11 and a positioning part 12 disposed on the outer side wall of the main body 11. The first electrode 101 and the second electrode 102 are both disposed on the main body 11. The circuit board 20 is connected to the main body 11 and located on the bottom surface of the main body 11. The circuit board 20 is electrically connected to the first electrode 101 and the second electrode 102. The relay 30 is fixedly disposed on the circuit board 20. The electromagnetic coil of the relay 30 is electrically connected to the circuit board 20. The contacts of the relay 30... The contact switch is connected in series with the first electrode 101 and the second electrode 102. The contact switch of the relay 30 is used to control the first electrode 101 and the second electrode 102 to be turned on or off. The positioning part 12 extends toward the relay 30 and forms a positioning space 13 opposite to the outer wall of the relay 30. The temperature protection structure 40 includes a temperature detection part 41 and a connection pin 42 electrically connected to the temperature detection part 41. The temperature detection part 41 is installed in the positioning space 13 and is sandwiched between the outer wall of the relay 30 and the positioning part 12. The connection pin 42 is electrically connected to the circuit board 20. The temperature detection part 41 is connected in series with the electromagnetic coil of the relay 30.

[0040] In the power supply device provided in the embodiments of this application, the positioning part 12 of the bracket 10 extends toward the relay 30 and forms a positioning space 13 opposite to the outer wall of the relay 30. The temperature detection part 41 of the temperature protection structure 40 is installed in the positioning space 13. Thus, the position of the positioning space 13 formed between the positioning part 12 and the outer wall of the relay 30 in different power supply devices is relatively fixed relative to the outer wall of the relay 30. That is, the detection position of the temperature detection part 41 of the temperature protection structure 40 relative to the outer wall of the relay 30 in different power supply devices can be kept consistent, so that the critical temperature value for triggering the temperature detection part 41 of the temperature protection structure 40 is consistent among different power supply devices. The small current of the electromagnetic coil of the relay 30 controls the contact switch to conduct or disconnect the large current supplied by the first electrode 101 and the second electrode 102, thereby improving the power safety level of the power supply device and effectively reducing potential power safety hazards.

[0041] like Figure 1As shown, in this power supply device, the positioning part 12 includes a first positioning plate 121, a second positioning plate 122, and a third positioning plate 123. The surface of the first positioning plate 121 is spaced apart from the outer wall of the relay 30. The second positioning plate 122 and the third positioning plate 123 are respectively connected to the two side edges of the first positioning plate 121. Both the second positioning plate 122 and the third positioning plate 123 extend from the first positioning plate 121 toward the relay 30, that is, both the second positioning plate 122 and the third positioning plate 123 are located on the side of the first positioning plate 121 facing the relay 30. The first positioning plate 121, the second positioning plate 122, the third positioning plate 123, and the outer wall of the relay 30 together form a positioning space 13 with an insertion port 131. The second positioning plate 122, located away from the first positioning plate 121, and the third positioning plate 123, located away from the first positioning plate 121, can abut against the outer wall of the relay 30, or the second positioning plate 122 and the third positioning plate 123, located away from the first positioning plate 121, can be spaced apart from the outer wall of the relay 30. When the temperature detection unit 41 is installed in the positioning space 13, the temperature detection unit 41 is sandwiched between the outer wall of the relay 30 and the first positioning plate 121, that is, the temperature detection unit 41 is attached to the position where the temperature rise of the outer wall of the relay 30 is the greatest. Thus, the temperature detection unit 41 can accurately detect the temperature of the relay 30. Moreover, the detection position of the temperature detection unit 41 of the temperature protection structure 40 in different power supply devices on the outer wall of the relay 30 can be kept consistent, so that the critical temperature value for triggering the temperature detection unit 41 of the temperature protection structure 40 is consistent among different power supply devices. Furthermore, during the process of inserting the temperature detection unit 41 into the positioning space 13, the second positioning plate 122 and the third positioning plate 123 respectively position and restrict the upper and lower sides of the temperature detection unit 41, so that the position of the temperature detection unit 41 with the greatest temperature rise relative to the outer wall of the relay 30 will not move down or up, and the temperature detection unit 41 will fit against the position of the greatest temperature rise on the outer wall of the relay 30.

[0042] like Figure 1 As shown, the first positioning plate 121 has a plurality of anti-slip ribs 124 spaced apart on its surface facing the relay 30, and the anti-slip ribs 124 abut against the temperature detection part 41. In this way, when the power supply device is moved and subjected to external forces, such as collisions or vibrations, the anti-slip ribs 124 can keep the temperature detection part 41 stably fixed within the positioning space 13, effectively preventing the temperature detection part 41 from falling out of the positioning space 13.

[0043] like Figures 1 to 3As shown, the bracket 10 also includes at least two positioning posts 14. The positioning posts 14 are connected to the bottom surface of the main body 11. The circuit board 20 has positioning holes that correspond one-to-one with the positioning posts 14. When the circuit board 20 is connected to the bottom surface of the main body 11, the positioning posts 14 pass through the positioning holes of the circuit board 20, allowing the circuit board 20 and the bracket 10 to be quickly positioned and placed in place, improving assembly efficiency. Then, the circuit board 20 can be locked to the bottom surface of the main body 11 with screws, or the circuit board 20 can be glued and fixed to the bottom surface of the main body 11 with structural adhesive.

[0044] In the power supply device provided in the embodiments of this application, the bracket 10 is a one-piece molded component. Preferably, the bracket 10 is a plastic part manufactured in one piece using injection molding or sprue molding processes.

[0045] To improve the heat transfer efficiency between the temperature sensing unit 41 and the relay 30, a thermally conductive adhesive layer is provided between the outer walls of the temperature sensing unit 41 and the relay 30. This thermally conductive adhesive layer fills the small air gaps between the outer walls of the temperature sensing unit 41 and the relay 30, thereby increasing the heat transfer area and improving heat transfer efficiency. During the installation of the temperature sensing unit 41 into the positioning space 13, an appropriate amount of adhesive, such as 0.5 ml of thermally conductive adhesive, is first applied to the outer wall of the relay 30 corresponding to the positioning space 13. Then, the temperature sensing unit 41 is inserted into the positioning space 13. The thermally conductive adhesive is spread out by the pressure between the temperature sensing unit 41 and the outer walls of the relay 30 and overflows between the temperature sensing unit 41 and the second positioning plate 122 and the third positioning plate 123, thus filling the space between the temperature sensing unit 41 and the outer walls of the relay 30 with thermally conductive adhesive. Compared to existing power supply devices that require waiting for the thermally conductive adhesive to fully cure before they can be moved and transported, the power supply device provided in this application allows the temperature detection unit 41 to be stably attached to the detection position on the outer wall of the relay 30 via the positioning part 12. Therefore, it does not require waiting for the thermally conductive adhesive to cure, and the temperature detection unit 41 can be moved and transported after it is inserted into the positioning space 13. The temperature detection unit 41 is restricted by the positioning part 12 and will not shift its position relative to the relay 30.

[0046] In some embodiments, the power supply device can be a socket, in which case the first terminal 101 is used to connect to an external power source to receive current, and the second terminal 102 serves as the output terminal of the socket to output current. Figure 1 As shown, the main body 11 has a receiving groove 111, and the second electrical terminal 102 is disposed within the receiving groove 111. When the plug is inserted into the socket, the plug terminal is inserted into the receiving groove 111 and electrically connected to the second electrical terminal 102. Furthermore, as... Figure 3 and Figure 4As shown, the power supply device for the socket also includes a grounding wire 50 and a grounding bridge component 60. The grounding bridge component 60 is locked to the main body 11 by screws. The grounding wire 50 is connected to one of the positioning posts 14 and passes through the circuit board 20. That is, one of the positioning posts 14 provides installation support for the grounding wire 50. Thus, one of the positioning posts 14 and the grounding wire 50 (which is a metal plate) passing through the circuit board 20 serve as two support legs for the grounding bridge component 60, keeping the grounding bridge component 60 stable. The grounding bridge component 60 is electrically connected to the grounding wire 50. The grounding bridge component 60 has two spaced elastic arms 61 that extend away from the main body 11. The two elastic arms 61 are used to clamp the plug when it is inserted into the second electrode 102 and are electrically connected to the grounding wire of the plug to achieve grounding protection. Furthermore, the two elastic arms 61 clamping the plug also provides insertion positioning for the plug, which helps to quickly complete the insertion between the plug and the socket.

[0047] like Figure 4 As shown, the power supply device serving as the socket also includes a protection component 70. The protection component 70 includes a protection plate 71 and a reset elastic member 72. The surface of the protection plate 71 facing away from the main body 11 has two spaced protrusions 711 and a through hole 712 located between the two protrusions 711. Both protrusions 711 have inclined surfaces 713 with the same inclination direction. The protection plate 71 can be slidably disposed in the receiving groove 111. The protection plate 71 has a first position that blocks the second electrical terminal 102 and a second position that avoids the second electrical terminal 102. One end of the reset elastic member 72 is connected to the main body 11, and the other end is connected to the protection plate 71. The reset elastic member 72 provides the protection plate 71 with a spring force to slide and reset it from the second position to the first position. When the plug is inserted into the socket, the two plug terminals abut against the inclined surfaces 713 of the two protrusions 711, and then the two plug terminals simultaneously push against the two inclined surfaces 713, causing the protective plate 71 to slide from the first position to the second position. The two plug terminals then insert into the receiving groove 111 and become electrically connected to the second electrode 102. When the plug is unplugged, the protective plate 71 slides back to the first position under the elastic force of the reset elastic member 72, blocking the second electrode 102 and preventing anyone from inserting their fingers into and touching the second electrode 102, thus preventing electric shock, especially to children.

[0048] In some embodiments, the power supply device can be a plug, in which case the first terminal 101 serves as the input terminal of the plug to receive current, and the second terminal 102 serves as the output terminal of the plug to output current. For example... Figure 3As shown, the power supply device, which serves as a plug, also includes an adapter 91 and a plug terminal 93. The adapter 91 has a snap-fit ​​arm 92, and at least one positioning post 14 has a mounting groove 141. The snap-fit ​​arm 92 is snapped and fixed in the mounting groove 141. The plug terminal 93 is mounted on the adapter 91 and electrically connected to the first electrode 101. The adapter 91 and the plug terminal 93 are assembled as a modular component independent of the bracket 10, which helps to improve the assembly efficiency of the power supply device. Furthermore, as... Figure 3 and Figure 5 As shown, the power supply device, which serves as a plug, also includes a housing 80 and a grounding wire 50. The bracket 10, circuit board 20, and adapter 91 are all housed within the housing 80. The plug terminal 93 extends out of the housing 80 in a direction away from the circuit board 20. At least a portion of the grounding wire 50 is attached to the snap-fit ​​arm 92 and exposed outside the housing 80 on the side wall of the housing 80. The grounding wire 50 is used to electrically connect with the grounding wire of the socket when the plug terminal 93 is plugged into the socket, thereby achieving grounding protection.

[0049] In some embodiments, the power supply device may also be a composite structure of a socket and a plug. That is, one end of the opposite ends of the power supply device extends through the plug terminal 93, such as... Figure 5 As shown, this end is the plug end of the power supply device; the other end of the opposite ends of the power supply device is the socket end, and the two flexible arms 61 protrude from this end and are exposed outside the housing 80, as shown. Figure 5 As shown.

[0050] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A power supply device comprising a first electrode terminal (101) and a second electrode terminal (102), characterized in that, The power supply device also includes: The bracket (10) includes a main body (11) and a positioning part (12) disposed on the outer side wall of the main body (11), wherein the first electrode (101) and the second electrode (102) are both disposed on the main body (11); A circuit board (20) is connected to the main body (11) and located on the bottom surface of the main body (11). The circuit board (20) is electrically connected to the first electrode (101) and the second electrode (102). A relay (30) is fixedly mounted on the circuit board (20). The electromagnetic coil of the relay (30) is electrically connected to the circuit board (20). The contact switch of the relay (30) is connected in series with the first electrode (101) and the second electrode (102). The contact switch of the relay (30) is used to control the first electrode (101) and the second electrode (102) to be connected or disconnected. The positioning part (12) extends toward the relay (30) and forms a positioning space (13) opposite to the outer wall of the relay (30). The temperature protection structure (40) includes a temperature detection unit (41) and a connection pin (42) electrically connected to the temperature detection unit (41). The temperature detection unit (41) is installed in the positioning space (13). The temperature detection unit (41) is sandwiched between the outer wall of the relay (30) and the positioning part (12). The connection pin (42) is electrically connected to the circuit board (20). The temperature detection unit (41) is connected in series with the electromagnetic coil of the relay (30).

2. The power supply device according to claim 1, characterized in that, The positioning part (12) includes a first positioning plate (121), a second positioning plate (122) and a third positioning plate (123). The surface of the first positioning plate (121) is spaced apart from the outer side wall of the relay (30). The second positioning plate (122) and the third positioning plate (123) are respectively connected to the two side edges of the first positioning plate (121). The first positioning plate (121), the second positioning plate (122), the third positioning plate (123) and the outer side wall of the relay (30) together form the positioning space (13) with an insertion port (131).

3. The power supply device according to claim 2, characterized in that, The first positioning plate (121) has a plurality of anti-slip ribs (124) spaced apart on the plate surface facing the relay (30), and the anti-slip ribs (124) abut against the temperature detection part (41).

4. The power supply device according to claim 3, characterized in that, The bracket (10) further includes at least two positioning posts (14), which are connected to the bottom surface of the main body (11) and pass through the circuit board (20).

5. The power supply device according to any one of claims 1-4, characterized in that, The bracket (10) is a one-piece molded component.

6. The power supply device according to any one of claims 1-4, characterized in that, A thermally conductive adhesive layer is provided between the temperature detection unit (41) and the outer wall of the relay (30).

7. The power supply device according to claim 4, characterized in that, The power supply device can be a socket, the main body (11) has a receiving groove (111), and the second electrical terminal (102) is disposed in the receiving groove (111); The power supply device further includes a grounding wire (50) and a grounding bridge component (60). The grounding bridge component (60) is fixedly installed on the main body (11). The grounding wire (50) is connected to one of the positioning posts (14) and passes through the circuit board (20). The grounding bridge component (60) is electrically connected to the grounding wire (50). The grounding bridge component (60) has two spaced elastic arms (61). The two elastic arms (61) extend away from the main body (11). The two elastic arms (61) are used to clamp the plug when the plug is inserted into the second electrode (102) and are electrically connected to the grounding wire of the plug.

8. The power supply device according to claim 7, characterized in that, The power supply device further includes a protection component (70), which includes a protection plate (71) and a reset elastic member (72). The protection plate (71) has two spaced protrusions (711) and a through hole (712) between the two protrusions (711) on its surface away from the main body (11). Both protrusions (711) have inclined surfaces (713) with the same inclination direction. The protection plate (71) is slidably disposed in the receiving groove (111). The protection plate (71) has a first position that blocks the second electrode (102) and a second position that avoids the second electrode (102). One end of the reset elastic member (72) is connected to the main body (11) and the other end is connected to the protection plate (71). The reset elastic member (72) provides the protection plate (71) with a spring force to slide back from the second position to the first position.

9. The power supply device according to any one of claims 4, 7, and 8, characterized in that, The power supply device can be a plug; The power supply device further includes an adapter (91) and a plug-in terminal (93). The adapter (91) is provided with a snap-fit ​​arm (92), and at least one of the positioning posts (14) is provided with a mounting groove (141). The snap-fit ​​arm (92) is snapped and fixed in the mounting groove (141). The plug-in terminal (93) is installed in the adapter (91) and electrically connected to the first electrode (101).

10. The power supply device according to claim 9, characterized in that, The power supply device also includes a housing (80) and a grounding wire (50). The bracket (10), the circuit board (20) and the adapter (91) are all housed in the housing (80). The plug-in terminal (93) extends out of the housing (80) in a direction away from the circuit board (20). At least a portion of the grounding wire (50) is attached to the snap-fit ​​arm (92) and exposed outside the housing (80) on the side wall of the housing (80). The grounding wire (50) is used to electrically connect with the grounding wire of the socket when the plug-in terminal (93) is plugged into the socket.

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