manual maintenance switch

Abstract

The utility model discloses a manual maintenance switch, including plug assembly and socket assembly. Plug assembly includes plug shell, insulator and plug terminal. The insulator is detachably connected in the plug cavity of plug shell, and a plurality of first via holes are formed on it, and the insulator and the cavity bottom wall are left with a gap. The plug terminal is composed of a plurality of parallel plug -in sections and the transition section of connecting them, and the plug -in section passes through the first via hole, and the transition section is fixed in the gap. Socket assembly includes socket shell and socket terminal with the plug -in of plug terminal. The scheme is through setting the transition section of plug terminal in the gap between insulator and shell bottom wall, effectively utilizes the space, optimized the terminal fixed mode, improved the structure stability, reliability and maintenance convenience of product.

Description

Technical Field

[0001] This utility model relates to the field of electrical connections, and in particular to a manual maintenance switch. Background Technology

[0002] Manual maintenance switches are critical safety components in high-voltage electrical systems, typically installed on high-voltage circuits. When system inspection or maintenance is required, the high-voltage power supply can be disconnected via the manual maintenance switch, ensuring the safety of operators. In existing technologies, the plug terminals are often fixed within the plug housing through direct injection molding. However, injection molds are complex, production processes are demanding, and once the terminal positions are determined, adjustments and maintenance are difficult, resulting in poor flexibility. Therefore, there is an urgent need for a novel manual maintenance switch structure that optimizes the fixing method of the plug terminals, ensuring connection reliability, stability, and ease of maintenance while achieving a compact product design. Utility Model Content

[0003] The main objective of this invention is to provide a manual maintenance switch, comprising a plug assembly and a socket assembly. The plug assembly includes: A plug housing, wherein a plug cavity is provided inside the plug housing; An insulator is detachably connected to the plug cavity. The insulator has multiple first through holes, and a gap is provided between the end of the insulator away from the opening of the plug cavity and the bottom wall of the plug cavity. A plug terminal having a plurality of parallel insertion segments and a transition segment connecting the insertion segments, the insertion segments passing through the first through hole, and the transition segment being at least partially fixed to the gap; The socket assembly includes: The socket housing has socket terminals inside, which are connected to the plug terminals.

[0004] Optionally, in one embodiment of the present invention, the number of the plug segments is two, and the plug terminals are U-shaped.

[0005] Optionally, in one embodiment of the present invention, the insulator is further provided with a plurality of mounting cavities, and each mounting cavity is provided with a shorting male pin; The socket assembly also includes multiple cores, each core having multiple socket terminals. The cores are inserted into the mounting cavity to connect the socket terminals with the shorting male pin.

[0006] Optionally, in one embodiment of the present invention, the plug housing is further provided with a pressing part, the pressing part is provided with a first locking part, and the socket housing is provided with a second locking part corresponding to the first locking part. Pressing the pressing part can lock or unlock the first locking part and the second locking part.

[0007] Optionally, in one embodiment of the present invention, the socket housing is provided with a limiting rib corresponding to the pressing part, and when the plug housing and the socket housing are fully inserted, the limiting rib is at least partially located at the bottom of the pressing part.

[0008] Optionally, in one embodiment of the present invention, a U-shaped through groove is provided on the side wall of the plug housing near the opening of the plug cavity, and the pressing part is formed in the middle of the U-shaped through groove.

[0009] Optionally, in one embodiment of the present invention, the side wall of the socket housing is provided with two mounting plates parallel to the insertion direction, and the two mounting plates and the side wall of the socket housing together form a locking groove; The pressing part has a protrusion on each side of the end near the opening of the plug cavity facing the mounting plate to form the first locking part. The first locking part has a first height h1. The mounting plate has a protrusion on the opposite side near the opening of the socket cavity to form the second locking part. The second locking part and the bottom wall of the locking groove have a second height h2, where h2>h1. When locked, the pressing part is pressed so that the first locking part enters from between the second locking part and the bottom wall of the locking groove into the space between the second locking part and the limiting rib.

[0010] Optionally, in one embodiment of the present invention, the plug assembly further includes a handle, the handle having a latch, and the pressing part having a locking hook at one end near the opening of the plug cavity, the locking hook engaging with the latch.

[0011] Optionally, in one embodiment of the present invention, the socket terminal includes a fixing member and an elastic member. The fixing member is an L-shaped copper busbar. One end of the fixing member is fixedly connected to the socket housing by a first fastener, and the other end of the fixing member is fixedly connected to the elastic member by a second fastener.

[0012] Optionally, in one embodiment of the present invention, the elastic element is two elastic sheets arranged facing each other, and the two elastic sheets are fixed to opposite sides of the fixing element by a second fastener.

[0013] Optionally, in one embodiment of the present invention, the bottom wall of the plug cavity is provided with a first mounting wall, and the insulator is provided with a second mounting wall corresponding to the first mounting wall. The outer side of the second mounting wall abuts against the inner side of the first mounting wall. A boss is provided radially at one end of the second mounting wall away from the bottom wall of the plug cavity. The boss and the first mounting wall together form a first groove, and a first sealing ring is disposed in the first groove.

[0014] This invention achieves fixed installation of the insulator by creating a plug cavity within the plug housing of a manual maintenance switch and detachably connecting the insulator to the plug cavity. Multiple first through holes are created on the insulator to provide precise positioning and installation channels for the plug terminal insertion section. By maintaining a gap between the end of the insulator away from the plug cavity opening and the bottom wall of the plug cavity, and placing the transition section of the plug terminal within this gap, space is effectively utilized, the plug terminal fixing method is optimized, and the structural stability, reliability, and maintenance convenience of the manual maintenance switch are improved. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of one embodiment of the plug assembly of this utility model. Figure 2 This is a cross-sectional view from another direction of an embodiment of the plug assembly of this utility model; Figure 3 This is an exploded view of an embodiment of the plug assembly of this utility model; Figure 4 This is a cross-sectional view of one embodiment of the socket assembly of this utility model. Figure 5 This is a cross-sectional view from another direction of an embodiment of the socket assembly of this utility model; Figure 6 This is a schematic diagram of the structure of an embodiment of the socket assembly of this utility model; Figure 7 for Figure 6 Enlarged view at point A; Figure 8 This is an exploded view of an embodiment of the socket assembly of this utility model; Figure 9 This is a cross-sectional view of one embodiment of the manual maintenance switch of this utility model. Figure 10 This is a cross-sectional view from another direction of an embodiment of the manual maintenance switch of this utility model; Figure 11 This is a schematic diagram of an embodiment of the insulator of this utility model.

[0017] Explanation of icon numbers: 100. Manual maintenance switch; 10. Plug assembly; 101. Plug housing; 101a. Plug cavity; 101b. U-shaped through groove; 1011. First mounting wall; 102. Insulator; 102a. Mounting cavity; 102b. First groove; 1021. First through hole; 1022. Second mounting wall; 1023. Boss; 103. Plug terminal; 1031. Plug section; 1032. Transition section; 104. Shorting male pin; 105. Pressing part; 1051. First locking part; 1052. Locking hook ; 106, handle; 1061, latch; 107, first sealing ring; 20, socket assembly; 201, socket housing; 201a, locking groove; 2011, mounting plate; 202, socket terminal; 2021, fastener; 2022, elastic element; 203, rubber core; 204, socket terminal; 205, second locking part; 206, limiting rib; 2071, first fastener; 2072, second fastener; 31, gap.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment 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 indicator will also change accordingly.

[0021] Furthermore, the use of terms such as "first" and "second" in this utility model 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 those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] Manual maintenance switches are critical safety components in high-voltage electrical systems, typically installed on high-voltage circuits. When system inspection or maintenance is required, the high-voltage power supply can be disconnected via the manual maintenance switch, ensuring the safety of operators. In existing technologies, the plug terminals are often fixed within the plug housing through direct injection molding. However, injection molds are complex, production processes are demanding, and once the terminal positions are determined, adjustments and maintenance are difficult, resulting in poor flexibility. Therefore, there is an urgent need for a novel manual maintenance switch structure that optimizes the fixing method of the plug terminals, ensuring connection reliability, stability, and ease of maintenance while achieving a compact product design.

[0023] In view of this, the present invention proposes a manual maintenance switch. By creating a plug cavity within the plug housing of the manual maintenance switch and detachably connecting an insulator to the plug cavity, the insulator is fixedly installed. Multiple first through holes are created on the insulator, providing precise positioning and installation channels for the plug terminal insertion section. By maintaining a gap between the end of the insulator away from the plug cavity opening and the bottom wall of the plug cavity, and placing the transition section of the plug terminal within the gap between the insulator and the bottom wall of the housing, space is effectively utilized, the plug terminal fixing method is optimized, and the structural stability, reliability, and maintenance convenience of the manual maintenance switch are improved.

[0024] To better understand the above technical solution, a detailed explanation of the technical solution is provided below with reference to the accompanying drawings.

[0025] like Figure 1-11As shown, this utility model proposes a manual maintenance switch 100, including a plug assembly 10 and a socket assembly 20. The plug assembly 10 includes: a plug housing 101, wherein a plug cavity 101a is provided inside the plug housing 101; an insulator 102, detachably connected to the plug cavity 101a, wherein the insulator 102 is provided with a plurality of first through holes 1021, and a gap 31 is provided between one end of the insulator 102 away from the opening of the plug cavity 101a and the bottom wall of the plug cavity 101a; and a plug terminal 103, wherein the plug terminal 103 has a plurality of mutually parallel insertion segments 1031 and a transition segment 1032 connecting the insertion segments 1031, wherein the insertion segments 1031 pass through the first through holes 1021, and the transition segment 1032 is at least partially fixed to the gap 31; the socket assembly 20 includes: a socket housing 201, wherein a socket terminal 202 is provided inside the socket housing 201, and the socket terminal 202 is inserted and connected to the plug terminal 103.

[0026] Understandably, the manual maintenance switch 100 is a safety disconnect device used in high-voltage circuits of new energy vehicles, energy storage systems, etc. The manual maintenance switch 100 includes a detachable plug assembly 10 and a socket assembly 20. The precise engagement and disengagement of these two components control the circuit's on / off state. The plug assembly 10 is the movable part of the manual maintenance switch 100, typically operated by hand. The plug housing 101 serves as the external structural component and first line of defense for the entire plug assembly 10. Its internal structure is hollow, forming a plug cavity 101a, primarily used to house and secure the internal components, providing them with mechanical protection and electrical insulation. The plug terminals 103 are generally made of conductive metal and are used to carry current. The socket housing 201 contains socket terminals 202. When the plug assembly 10 is plugged into the socket assembly 20, the plug terminals 103 and socket terminals 202 make contact and conduct, thereby enabling current transmission. The plug terminal 103 includes multiple parallel insertion segments 1031, one end of which is used to form a plug-in contact with the socket terminal 202. The other ends of the multiple insertion segments 1031 are connected by a transition segment 1032. The insulator 102 is an insulating component inside the plug assembly 10. The insulator 102 ensures electrical insulation between the plug terminals 103 and between the plug terminals 103 and the plug housing 101, preventing short circuit accidents. The insulator 102 is provided with multiple first through holes 1021, which are used to precisely fix, guide, and support the insertion segments 1031 of the plug terminals 103, so that the insertion segments 1031 are inserted into the first through holes 1021. The insulator 102 and the inner wall of the plug cavity 101a are detachably connected. Specifically, this connection can be achieved by a snap-fit ​​structure, sliding fit between guide ribs and grooves, or screw fastening. For example, the outer side of the insulator 102 may be provided with elastic claws, and correspondingly, the inner wall of the plug cavity 101a is provided with a slot. During installation, the claws are locked and fixed with the slot by pressing or pushing; during disassembly, the locking can be released by a specific tool or structure, and the insulator 102 can be removed as a whole. A gap 31 is reserved between the insulator 102 and the bottom wall of the cavity, and the transition section 1032 of the plug terminal 103 is at least partially fixed in the gap 31. In this way, the plug terminal 103 is fixed and supported inside the plug housing 101 by using the insulator 102, the bottom wall of the plug cavity 101a, and the multiple first through holes 1021. By placing the transition section 1032 in the gap 31, space utilization is greatly optimized, which helps to achieve the miniaturization and compact design of the manual maintenance switch 100. At the same time, the transition section 1032 is bidirectionally constrained by the bottom wall of the plug cavity 101a and the insulator 102 in the gap 31, making it more firmly fixed. It can effectively resist the vibration and impact during vehicle operation, prevent the terminals from loosening, and improve the long-term stability and safety of the electrical connection.When the plug terminal 103 is damaged or needs to be replaced, it is not necessary to replace the entire plug assembly 10. The insulator 102 can be removed from the plug housing 101 for repair or replacement, which greatly reduces maintenance costs and time.

[0027] Furthermore, in one embodiment of this utility model, the number of the plug segments 1031 is two, and the plug terminal 103 is U-shaped.

[0028] Understandably, the two parallel plug segments 1031 can compactly pass through the corresponding two first through holes 1021 on the insulator 102, realizing the function of arranging dual plug points within a limited cross-sectional area. Simultaneously, the U-shaped transition segment 1032 naturally accommodates the gap 31 between the insulator 102 and the bottom wall of the plug cavity 101a, perfectly matching the shape of this gap 31, achieving efficient utilization of three-dimensional space. This layout effectively constrains and supports the plug terminal 103 in all directions, enhancing its stability under vibration, preventing the plug segments 1031 from skewing or deforming, and ensuring the accuracy and consistency of contact pressure when plugged into the socket terminal 202.

[0029] Furthermore, in one embodiment of the present invention, the insulator 102 is further provided with a plurality of mounting cavities 102a, each mounting cavity 102a being provided with a shorting male pin 104; the socket assembly 20 further includes a plurality of rubber cores 203, each rubber core 203 being provided with a plurality of socket terminals 204, the rubber core 203 being inserted into the mounting cavity 102a so that the socket terminals 204 are connected to the shorting male pin 104.

[0030] Understandably, in addition to the first through-hole 1021 for the plug terminal 103 insertion section 1031 through which high voltage passes, multiple independent mounting cavities 102a are additionally provided on the insulator 102. These mounting cavities 102a are spatially isolated from the first through-hole 1021 for high voltage. Each mounting cavity 102a has a shorting male pin 104 fixedly installed, which constitutes part of the high voltage interlock detection function. The socket assembly 20 is correspondingly equipped with multiple independent cores 203 for the high voltage interlock function. Each core 203 encapsulates multiple socket terminals 204 corresponding to the shorting male pin 104. When the plug assembly 10 and the socket assembly 20 are fully engaged, the rubber cores 203 are simultaneously and precisely inserted into the corresponding mounting cavities 102a on the insulator 102. This ensures a reliable electrical connection between the socket terminals 204 within the rubber core 203 and the shorting male pins 104 in the mounting cavity 102a, thereby forming a complete and closed high-voltage interlock signal circuit. Through the structure of the insulator 102 itself, a physical isolation barrier is established between the high-voltage plug terminal 103 circuit and the low-voltage high-voltage interlock circuit, thus solving the problem of electrical interference that may be caused by close proximity between high and low voltage circuits.

[0031] Furthermore, in one embodiment of the present invention, the plug housing 101 is further provided with a pressing part 105, the pressing part 105 is provided with a first locking part 1051, and the socket housing 201 is provided with a second locking part 205 corresponding to the first locking part 1051. Pressing the pressing part 105 can lock or unlock the first locking part 1051 and the second locking part 205.

[0032] Understandably, a pressing part 105 is provided on the outer wall of the plug housing 101. The pressing part 105 is connected to the main body of the plug housing 101 through an elastic structure, allowing it to elastically deform when pressed by an external force and automatically reset after the external force is removed. The pressing part 105 can be a component formed by a button and a spring, or other common components, which are not limited here. A first locking part 1051 is provided on the pressing part 105, which can be a protrusion, a hook, or a block. Correspondingly, a second locking part 205 is provided on the socket housing 201 at a position corresponding to the first locking part 1051. The second locking part 205 can be a bayonet, a slot, or a stop. When the operator inserts the plug assembly 10 into the socket assembly 20, the locking of the plug assembly 10 and the socket assembly 20 is achieved by the locking of the first locking part 1051 and the second locking part 205. When disconnection is required, the operator simply presses the pressing part 105 again, causing the first locking part 1051 to disengage from the second locking part 205. The mutual engagement of the first locking part 1051 and the second locking part 205 provides a strong mechanical locking force, which can effectively resist vibration, impact and accidental pulling, ensuring the long-term stability of the high-voltage connection under harsh working conditions and preventing safety accidents such as electric arcs and overheating caused by loose connections.

[0033] Furthermore, in one embodiment of the present invention, the socket housing 201 is provided with a limiting rib 206 corresponding to the pressing part 105. When the plug housing 101 and the socket housing 201 are fully inserted, the limiting rib 206 is at least partially located at the bottom of the pressing part 105.

[0034] Understandably, a raised limiting rib 206 is provided on the socket housing 201, directly opposite the pressing portion 105 of the plug housing 101. When the plug assembly 10 is fully inserted into the socket assembly 20 and locked, at least a portion of the limiting rib 206 extends to and is located directly below the pressing portion 105, creating spatial interference and thus blocking the movement path of the pressing portion 105. At this time, if an operator or external object accidentally presses the pressing portion 105 inward, the rigid blocking of the limiting rib 206 prevents the pressing portion 105 from deforming or displacing, thus preventing the first locking portion 1051 from disengaging from the second locking portion 205 of the socket housing 201. This design fundamentally ensures that under normal power-on operation, the locking mechanism will not be accidentally unlocked due to accidental squeezing, collision, or mis-touch, ensuring the absolute stability of the high-voltage connection. When disconnection is required, an axial pulling force can be applied to the plug assembly 10 to separate it from the socket assembly 20. This pulling force will cause the plug assembly 10 to move outward a small distance relative to the socket assembly 20. During this movement, the pressing part 105 will move outward synchronously, gradually disengaging its bottom from the blocking range of the limiting rib 206, while the first locking part 1051 remains locked to the second locking part 205. Once the pressing part 105 is out of the interference area of ​​the limiting rib 206, it regains its pressable freedom. At this point, the operator can press the pressing part 105 inward to unlock the first locking part 1051 and the second locking part 205, thus completely pulling out the plug assembly 10.

[0035] Furthermore, in one embodiment of the present invention, a U-shaped through groove 101b is provided on the side wall of the plug housing 101 near the opening of the plug cavity 101a, and the pressing part 105 is formed in the middle of the U-shaped through groove 101b.

[0036] Understandably, a U-shaped through groove 101b is formed on the side wall of the plug housing 101, near the opening of the plug cavity 101a. The outline of this U-shaped through groove 101b resembles an inverted "U" shape, consisting of a transverse groove near the opening of the plug cavity 101a and two longitudinal grooves connecting the two ends of the transverse groove. These three grooves penetrate the wall thickness of the plug housing 101, thus cutting an elastic structure on the side wall of the plug housing 101 where three sides are separate from the main body of the plug housing 101, and only one side is connected to the main body. This elastic portion defined and surrounded by the U-shaped through groove 101b constitutes the pressing part 105. By directly slotting the plug housing 101 and integrally forming the pressing part 105 with the plug housing 101, the mold structure and manufacturing process are greatly simplified, the number of parts is reduced, assembly costs and complexity are lowered, and gaps and loosening problems that may exist in the assembly of multiple parts are avoided, thus improving the overall structural integrity.

[0037] Further, in one embodiment of this utility model, the side wall of the socket housing 201 is provided with two mounting plates 2011 parallel to the insertion direction. The two mounting plates 2011 and the side wall of the socket housing 201 together form a locking groove 201a. The pressing part 105 has a protrusion on each side of the end near the opening of the plug cavity 101a facing the mounting plate 2011 to form the first locking part 1051. The first locking part 1051 has a first height h1. The end of the mounting plate 2011 near the opening of the socket cavity has a corresponding protrusion to form the second locking part 205. The second locking part 205 and the bottom wall of the locking groove 201a have a second height h2, where h2>h1. When locking, the pressing part 105 is pressed so that the first locking part 1051 enters from between the second locking part 205 and the bottom wall of the locking groove 201a between the second locking part 205 and the limiting rib 206.

[0038] Understandably, a socket cavity is formed within the socket housing 201, and various components are disposed within the socket cavity. Two parallel mounting plates 2011 are provided on the side wall of the socket housing 201, extending in the same direction as the plug insertion / removal direction. These two mounting plates 2011, together with the side wall of the socket housing 201, form a locking groove 201a with an opening at the top and near the socket cavity opening. This locking groove 201a provides a precise movement path and accommodating space for the pressing part 105 and its first locking part 1051. On the inner side of each mounting plate 2011 near the socket cavity opening (i.e., the side facing the inside of the locking groove 201a), an inwardly protruding structure is provided; these two protrusions together constitute the second locking part 205. The vertical distance between the lower surface of the second locking part 205 and the bottom wall of the locking groove 201a is the second height h2. On the plug assembly 10, at the end of the pressing part 105 near the opening of the plug cavity 101a (i.e., the free end), on the outer surface of its side mounting plates 2011, there are two outwardly protruding structures, which together constitute the first locking part 1051. The vertical height of the first locking part 1051 is defined as the first height h1. The second height h2 is greater than the first height h1, i.e., h2>h1. This dimensional difference provides the necessary movement space for locking and unlocking actions, allowing the first locking part 1051 to pass smoothly through the bottom of the second locking part 205 when pressed.

[0039] During locking, the plug assembly 10 is first inserted into the socket assembly 20. As the second locking part 205 blocks the first locking part 1051, the plug assembly 10 cannot be further inserted. At this point, the pressing part 105 is pressed, and the plug assembly 10 is continued to be inserted, causing the first locking part 1051 to slide into the space (height h2) between the second locking part 205 and the bottom wall of the locking groove 201a. Once the first locking part 1051 has completely passed the second locking part 205, it is now located between the second locking part 205 and the limiting rib 206. The pressing part 105 is then released, and it recovers its deformation due to its elasticity. Due to the interference of the second locking part 205, the first locking part 1051 is always kept confined at the end of the second locking part 205 away from the socket cavity opening. Continue inserting the plug assembly 10 until it is fully connected to the socket assembly 20. At this point, the limiting rib 206 is located at the bottom of the pressing part 105. Due to the action of the limiting rib 206, the pressing part 105 cannot be pressed, thus preventing accidental unlocking. To unlock, first slightly pull the plug assembly 10 outward a certain distance so that the pressing part 105 is removed from the blocking range of the limiting rib 206. Then, press the pressing part 105 inward to cause it to elastically deform again, and the first locking part 1051 moves downward accordingly. Since h2>h1, when the first locking part 1051 moves downward, there is enough space (h2) to completely descend below the second locking part 205. At this point, while maintaining the pressing state, the plug assembly 10 can be pulled outward again. Because the first locking part 1051 is now below the second locking part 205, it is no longer blocked by it, thus successfully achieving unlocking and separation.

[0040] Furthermore, in one embodiment of the present invention, the plug assembly 10 further includes a handle 106, the handle 106 having a latch 1061, and the pressing part 105 having a locking hook 1052 at one end near the opening of the plug cavity 101a, the locking hook 1052 being locked with the latch 1061.

[0041] Understandably, by providing a handle 106 on the plug assembly 10, a latch 1061 on the handle 106, and a latch 1061 on the pressing part 105, it is further ensured that the plug assembly 10 and the socket assembly 20 will not detach after being connected, thus improving the reliability of the connection.

[0042] Furthermore, in one embodiment of the present invention, the socket terminal 202 includes a fixing member 2021 and an elastic member 2022. The fixing member 2021 is an L-shaped copper busbar. One end of the fixing member 2021 is fixedly connected to the socket housing 201 by a first fastener 2071, and the other end of the fixing member 2021 is fixedly connected to the elastic member 2022 by a second fastener 2072.

[0043] Understandably, the socket terminal 202 adopts a split structure that is easy to assemble and maintain, consisting of two parts: a fixing member 2021 and a resilient member 2022. The fixing member 2021 is an L-shaped copper busbar. This L-shaped structure gives it two mutually perpendicular mounting surfaces: one surface serves as a fixing surface, which is securely mounted to the socket housing 201 by a first fastener 2071 (such as a screw or bolt), providing stable mechanical support for the entire socket terminal 202; the other surface serves as a connecting surface for mounting the resilient member 2022. The resilient member 2022 is a key component that directly contacts the insertion section 1031 of the plug terminal 103 and generates contact pressure. It is detachably fixed to the connecting surface of the fixing member 2021 by a second fastener 2072 (which can also be a screw or bolt). The split socket terminal 202 facilitates the maintenance and replacement of the resilient member 2022. As a vulnerable component, the elastic element 2022 can be replaced by simply loosening the second fastener 2072 when it needs to be replaced after long-term insertion and removal wear. This eliminates the need to replace the entire socket terminal 202 or socket assembly 20, greatly reducing maintenance costs and time.

[0044] Furthermore, in one embodiment of the present invention, the elastic element 2022 consists of two elastic sheets arranged facing each other, and the two elastic sheets are fixed to opposite sides of the fixing element 2021 by a second fastener 2072.

[0045] Understandably, the elastic element 2022 is a pair of opposing elastic sheets. These two elastic sheets are symmetrically fixed to opposite sides of the connecting surface of the L-shaped fastener 2021 by the second fastener 2072. When the plug terminal 103 is not inserted, a certain opening is maintained between the two elastic sheets. When the insertion section 1031 of the plug terminal 103 is inserted, it simultaneously opens the two opposing elastic sheets, causing them to elastically deform. By setting the elastic element 2022 in the form of elastic sheets, the contact pressure between it and the insertion section 1031 can be balanced. When the insertion section 1031 is inserted, it is clamped simultaneously from both sides by the two elastic sheets, and the contact pressure is symmetrical and balanced. This avoids uneven wear and poor contact that may result from unilateral contact, ensuring stable contact resistance and low temperature rise.

[0046] Furthermore, in one embodiment of the present invention, the bottom wall of the plug cavity 101a is provided with a first mounting wall 1011, and the insulator 102 is provided with a second mounting wall 1022 corresponding to the first mounting wall 1011. The outer side of the second mounting wall 1022 abuts against the inner side of the first mounting wall 1011. A boss 1023 is provided radially at one end of the second mounting wall 1022 away from the bottom wall of the plug cavity 101a. The boss 1023 and the first mounting wall 1011 together form a first groove 102b, and a first sealing ring 107 is disposed in the first groove 102b.

[0047] Understandably, a first mounting wall 1011 is formed by protruding upwards around the center on the bottom wall of the plug cavity 101a. Correspondingly, a matching second mounting wall 1022 is provided on the outer periphery of the bottom of the insulator 102. When the insulator 102 is installed in place, the outer surface of the second mounting wall 1022 tightly abuts against the inner surface of the first mounting wall 1011 of the plug housing 101, achieving initial positioning and assembly. Preferably, a locking structure can be provided on the first mounting wall 1011 and the second mounting wall 1022 to achieve a detachable connection between the insulator 102 and the plug housing 101. The locking structure is a common structure and is not limited here. At the upper end of the second mounting wall 1022, a boss 1023 extends outwards in its radial direction. The boss 1023 and the top of the first mounting wall 1011 cooperate to form an annular first groove 102b. The first sealing ring 107 is pre-installed in the first groove 102b. When the socket assembly 20 and the plug assembly 10 are fully inserted, the socket housing 201 covers the groove of the first recess 102b. The first sealing ring 107 is radially compressed by the first mounting wall 1011 and the socket housing 201 in the radial direction, and axially compressed by the bottom wall of the socket cavity and the boss 1023 in the axial direction, resulting in elastic deformation. This forms a tight and continuous sealing ring between the socket housing 201 and the plug housing 101, effectively preventing moisture and corrosive gases from entering and extending the service life of the entire manual maintenance switch 100.

[0048] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A manual maintenance switch (100), characterized in that, Includes a plug assembly (10) and a socket assembly (20). The plug assembly (10) includes: A plug housing (101) is provided with a plug cavity (101a) inside the plug housing (101). An insulator (102) is detachably connected to the plug cavity (101a). The insulator (102) is provided with a plurality of first through holes (1021). A gap (31) is provided between the end of the insulator (102) away from the opening of the plug cavity (101a) and the bottom wall of the plug cavity (101a). The plug terminal (103) has a plurality of parallel insertion segments (1031) and a transition segment (1032) connecting the insertion segments (1031), the insertion segments (1031) passing through the first through hole (1021), and the transition segment (1032) being at least partially fixed to the gap (31). The socket assembly (20) includes: The socket housing (201) has a socket terminal (202) inside, and the socket terminal (202) is plugged into the plug terminal (103).

2. The manual maintenance switch (100) as described in claim 1, characterized in that, There are two plug segments (1031), and the plug terminals (103) are U-shaped.

3. The manual maintenance switch (100) as described in claim 1, characterized in that, The insulator (102) is also provided with a plurality of mounting cavities (102a), and each mounting cavity (102a) is provided with a shorting male pin (104). The socket assembly (20) also includes a plurality of cores (203), each core (203) having a plurality of socket terminals (204) inserted into the mounting cavity (102a) to connect the socket terminals (204) to the shorting male pin (104).

4. A manual maintenance switch (100) as described in claim 1, characterized in that, The plug housing (101) is also provided with a pressing part (105), the pressing part (105) is provided with a first locking part (1051), and the socket housing (201) is provided with a second locking part (205) corresponding to the first locking part (1051). Pressing the pressing part (105) can lock or unlock the first locking part (1051) and the second locking part (205).

5. A manual maintenance switch (100) as described in claim 4, characterized in that, The socket housing (201) is provided with a limiting rib (206) corresponding to the pressing part (105). When the plug housing (101) and the socket housing (201) are fully inserted, the limiting rib (206) is at least partially located at the bottom of the pressing part (105).

6. A manual maintenance switch (100) as described in claim 5, characterized in that, The plug housing (101) has a U-shaped through groove (101b) on the side wall near the opening of the plug cavity (101a), and the pressing part (105) is formed in the middle of the U-shaped through groove (101b).

7. A manual maintenance switch (100) as described in claim 6, characterized in that, The socket housing (201) has two mounting plates (2011) on its side wall that are parallel to the insertion direction. The two mounting plates (2011) and the side wall of the socket housing (201) together form a locking groove (201a). The pressing part (105) has a protrusion on each side of the end near the opening of the plug cavity (101a) facing the mounting plate (2011) to form the first locking part (1051). The first locking part (1051) has a first height h1. The mounting plate (2011) has a protrusion on the opposite side near the opening of the socket cavity to form the second locking part (205). The second locking part (205) and the bottom wall of the locking groove (201a) have a second height h2, where h2>h1. When locked, press the pressing part (105) so that the first locking part (1051) enters from between the second locking part (205) and the bottom wall of the locking groove (201a) between the second locking part (205) and the limiting rib (206).

8. A manual maintenance switch (100) as described in claim 4, characterized in that, The plug assembly (10) also includes a handle (106), which has a latch (1061) inside. The pressing part (105) is also provided with a hook (1052) at one end near the opening of the plug cavity (101a), and the hook (1052) is locked with the latch (1061).

9. A manual maintenance switch (100) as described in claim 1, characterized in that, The socket terminal (202) includes a fixing member (2021) and an elastic member (2022). The fixing member (2021) is an L-shaped copper busbar. One end of the fixing member (2021) is fixedly connected to the socket housing (201) by a first fastener (2071), and the other end of the fixing member (2021) is fixedly connected to the elastic member (2022) by a second fastener (2072).

10. A manual maintenance switch (100) as described in claim 9, characterized in that, The elastic element (2022) consists of two elastic sheets arranged facing each other, and the two elastic sheets are fixed to the opposite sides of the fixing element (2021) by the second fastener (2072).

11. A manual maintenance switch (100) as described in claim 1, characterized in that, The bottom wall of the plug cavity (101a) is provided with a first mounting wall (1011), and the insulator (102) is provided with a second mounting wall (1022) corresponding to the first mounting wall (1011). The outer side of the second mounting wall (1022) abuts against the inner side of the first mounting wall (1011). The end of the second mounting wall (1022) away from the bottom wall of the plug cavity (101a) is provided with a boss (1023) in the radial direction. The boss (1023) and the first mounting wall (1011) together form a first groove (102b), and a first sealing ring (107) is provided in the first groove (102b).

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