Mechanical holding mechanism and load switch

Abstract

The utility model relates to the technical field of low-voltage electric appliances, and particularly discloses a mechanical holding mechanism and a load switch, and the mechanical holding mechanism comprises a mounting seat, a swing rod, and a push rod assembly slidably arranged on the mounting seat. One end of the swing rod is hinged to the mounting base, and the other end of the swing rod is provided with an insertion sliding piece which is embedded into the annular guide groove and can slide along the annular path of the annular guide groove; the annular guide groove is provided with a locking position used for clamping the plug-in sliding piece, and when the contact assembly is switched on and / or switched off, the push rod assembly is driven to move linearly so that the plug-in sliding piece can be located at the locking position. According to the invention, the opening and closing states of the contact assembly can be maintained through the mechanical maintaining mechanism, the energy consumption can be effectively reduced, and the reliability of the product can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a mechanical holding mechanism and a load switch. Background Art

[0002] When the load switch of the prior art cuts off the rated load current and a certain overload current, it usually uses a magnetic system to drive the moving contact structure and the static contact structure to open the switch. Similarly, the moving contact structure and the static contact structure are also driven and maintained by the magnetic system during the closing process. When the contact assembly of the load switch needs to be switched between the open state and the closed state, it is necessary to pass the current contact assembly in two different directions to the magnetic system to achieve the state switching. Therefore, the load switch of the prior art requires two power supplies with different current directions or a control board to convert the current direction, which is costly and the product stability is also poor. Utility Model Content

[0003] The purpose of the present application is to provide a mechanical holding mechanism and a load switch, which can maintain the opening and closing state of the contact assembly through the mechanical holding mechanism, which can not only effectively reduce energy consumption, but also effectively improve the reliability of the product.

[0004] The embodiment of the present application is implemented as follows:

[0005] In the first aspect, an embodiment of the present application provides a mechanical retaining mechanism, which is arranged in cooperation with a contact assembly in a load switch, and the mechanical retaining mechanism includes a mounting seat, a swing rod, and a push rod assembly slidably arranged on the mounting seat, and the push rod assembly is provided with an annular guide groove, one end of the swing rod is hinged to the mounting seat, and the other end is provided with a plug-in sliding member embedded in the annular guide groove and capable of sliding along an annular path of the annular guide groove; the annular guide groove has a locking position for clamping the plug-in sliding member, and when the contact assembly is closed and / or opened, the push rod assembly is driven to move linearly so that the plug-in sliding member is located in the locking position.

[0006] As an optional embodiment, an elastic member is sandwiched between the push rod assembly and the mounting seat. When the push rod assembly moves linearly, it can drive the elastic member to deform. The elastic member can form an elastic force acting on the push rod assembly, and the direction of the elastic force is opposite to the direction of linear movement.

[0007] As an optional embodiment, the locking position includes a first locking position for locking the closing switch, and the annular guide groove includes a first V-shaped groove and a second V-shaped groove arranged along the linear movement direction of the push rod assembly, and the openings of the first V-shaped groove and the second V-shaped groove are oriented in the same direction as the linear movement direction and the bottom is close to the hinged connection end of the swing rod; the first locking position is arranged at the bottom of the first V-shaped groove.

[0008] As an optional embodiment, the locking position also includes a second locking position for locking and maintaining the open gate, and the second locking position is arranged at the bottom of the second V-shaped groove, and the bottom of the first V-shaped groove has a first protrusion and a first recessed portion respectively located on both sides of the plug-in sliding member along the linear movement direction, and when the plug-in sliding member is located in the first recessed portion, the plug-in sliding member is driven to abut against the first protrusion, so that the plug-in sliding member slides to one side of the first V-shaped groove.

[0009] As an optional embodiment, the bottom of the second V-shaped groove has a second protrusion and a second recessed portion respectively located on both sides of the plug-in sliding member along the linear moving direction. When the plug-in sliding member is located in the second recessed portion, the plug-in sliding member is driven to abut against the second protrusion, causing the plug-in sliding member to slide toward one side of the second V-shaped groove.

[0010] As an optional implementation, the plug-in sliding member is a cylindrical rod whose extension direction is perpendicular to the plane where the annular guide groove is located.

[0011] In the second aspect, an embodiment of the present application provides a load switch, including a contact assembly, a drive mechanism and the above-mentioned mechanical holding mechanism, wherein the drive mechanism includes an electromagnet and an armature piece located at the drive end of the electromagnet, one end of the armature piece is connected to the push rod assembly and the other end is connected to the contact assembly, and the electromagnet drives the push rod assembly to move linearly by driving the armature.

[0012] As an optional embodiment, the driving mechanism also includes a fixed bracket, the middle part of the armature piece is rotatably arranged on the fixed bracket, the driving end of the electromagnet is located on the side of the armature piece close to the push rod assembly, and the driving direction of the electromagnet is consistent with the linear movement direction of the push rod assembly.

[0013] As an optional embodiment, the push rod assembly has a connecting socket, the opening of the connecting socket is oriented perpendicular to the linear moving direction, and the armature piece is provided with a connector penetrating the connecting socket.

[0014] As an optional embodiment, the contact assembly includes a static contact structure and a moving contact structure; a spring structure is provided at one end of the armature piece close to the static contact structure, and the moving contact structure is installed on the spring structure, and the moving contact structure can be elastically supported against the static contact structure through the spring structure.

[0015] As an optional implementation, it further includes a wiring terminal, and the moving contact structure is connected to the wiring terminal via a flexible connecting wire.

[0016] The beneficial effects of the embodiments of the present application include:

[0017] The mechanical holding mechanism provided in the embodiment of the present application is arranged in cooperation with the contact assembly in the load switch. The mechanical holding mechanism of the embodiment of the present application includes a mounting seat, a swing rod, and a push rod assembly slidably arranged on the mounting seat. The push rod assembly is provided with an annular guide groove, one end of the swing rod is hinged to the mounting seat, and the other end is provided with a plug-in sliding member embedded in the annular guide groove and can slide along the annular path of the annular guide groove. The annular guide groove of the embodiment of the present application has a locking position for clamping the plug-in sliding member, so that when the contact assembly is closed and / or opened, the push rod assembly is driven to move linearly so that the plug-in sliding member will be located in the locking position to lock and limit the contact assembly. Compared with the prior art, the embodiment of the present application realizes state retention through a mechanical structure, and it only needs to be powered on when the state is switched, and there are no more restrictions on the direction of the current. Therefore, the manufacturing cost of the product is greatly reduced, and the product stability is higher.

[0018] An embodiment of the present application provides a load switch, including a contact assembly, a driving mechanism and the above-mentioned mechanical holding mechanism. The driving mechanism of the embodiment of the present application includes an electromagnet and an armature piece located at the driving end of the electromagnet. One end of the armature piece is connected to the push rod assembly and the other end is connected to the contact assembly. The electromagnet drives the armature to drive the push rod assembly to move linearly, thereby causing the contact assembly to perform opening and closing operations and causing the mechanical holding mechanism to perform locking or unlocking operations. The embodiment of the present application uses the mechanical holding mechanism to maintain the opening and closing state of the contact assembly, which can not only effectively reduce energy consumption, but also effectively improve the reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is one of the structural schematic diagrams of the mechanical holding mechanism of an embodiment of the present application;

[0021] Figure 2 This is the second structural diagram of the mechanical holding mechanism of the embodiment of the present application;

[0022] Figure 3 This is the third structural diagram of the mechanical holding mechanism of the embodiment of the present application;

[0023] Figure 4 This is the fourth structural diagram of the mechanical holding mechanism of the embodiment of the present application;

[0024] Figure 5 This is one of the structural schematic diagrams of the load switch in the embodiment of the present application;

[0025] Figure 6 This is the second structural schematic diagram of the load switch according to the embodiment of the present application.

[0026] Icons: 100-contact assembly; 101-mounting seat; 102-swing rod; 103-push rod assembly; 104-annular guide groove; 105-plug-in sliding member; 106-first locking position; 107-second locking position; 108-straight moving direction; 109-first V-shaped groove; 110-second V-shaped groove; 111-first protrusion; 112-first recess; 113-second protrusion; 114-second recess; 115-electromagnet; 116-armature piece; 117-fixed bracket; 118-connecting socket; 119-plug-in member; 120-static contact structure; 121-moving contact structure; 122-spring structure; 123-connecting terminal; 124-flexible connecting wire. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0029] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0030] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] Reference Figure 1 and Figure 2 As shown, an embodiment of the present application provides a mechanical holding mechanism, which is arranged in cooperation with a contact assembly 100 in a load switch, and is used to enable the contact assembly 100 to be maintained in a closed state and an open state or to switch between them. The mechanical holding mechanism includes a mounting seat 101, a swing rod 102, and a push rod assembly 103 slidably arranged on the mounting seat 101, and an annular guide groove 104 is arranged on the push rod assembly 103. One end of the swing rod 102 is hinged to the mounting seat 101, and the other end is provided with a plug-in sliding member 105 embedded in the annular guide groove 104 and can slide along the annular path of the annular guide groove 104; the annular guide groove 104 has a locking position for clamping the plug-in sliding member 105. When the contact assembly 100 is closed or opened, the push rod assembly 103 is driven to move linearly so that the plug-in sliding member 105 is located in the locking position.

[0032] It should be noted that there can be only one locking position on the annular guide groove 104 of the push rod assembly 103 .

[0033] For example, when the contact assembly 100 is closed, the push rod assembly 103 is driven to move linearly so that the plug-in sliding member 105 is located at the locking position, and the contact assembly 100 can be kept in the closed position by the clamping of the locking position. In this embodiment, the position holding structure for the opening can be set on other structures, such as the contact assembly 100.

[0034] For example, when the contact assembly 100 is opened, the push rod assembly 103 is driven to move linearly so that the plug-in sliding member 105 is located at the locking position, and the contact assembly 100 can be kept in the opening position by the clamping of the locking position. In this embodiment, the position holding structure for closing can be set on other structures, such as the contact assembly 100.

[0035] It should be noted that there may be two locking positions on the annular guide groove 104 .

[0036] For example, the annular guide groove 104 has a first locking position 106 and a second locking position 107 for clamping the plug-in sliding member 105. When the contact assembly 100 is closed, the push rod assembly 103 is driven to move linearly so that the plug-in sliding member 105 is located in the first locking position 106; when the contact assembly 100 is opened, the push rod assembly 103 is driven to move linearly so that the plug-in sliding member 105 is located in the second locking position 107.

[0037] It should be noted that the mounting seat 101 of the embodiment of the present application is provided with a slide groove, and a slider connected to the slide groove is provided on the push rod assembly 103. Exemplarily, the mounting seat 101 is provided with slide grooves on both sides of the moving direction of the push rod assembly 103, and the slide grooves on both sides clamp the push rod assembly 103, and sliders connected to the slide grooves are provided on both sides of the push rod assembly 103.

[0038] It should be noted that the specific structure of the push rod assembly 103 can be configured by those skilled in the art as required, and is not particularly limited thereto.

[0039] The mechanical holding mechanism provided in the embodiment of the present application is connected to the contact assembly 100 in the load switch. The mechanical holding mechanism of the embodiment of the present application includes a mounting seat 101, a swing rod 102 and a push rod assembly 103 slidably arranged on the mounting seat 101, and an annular guide groove 104 is arranged on the push rod assembly 103. One end of the swing rod 102 is hinged to the mounting seat 101, and the other end is provided with a plug-in sliding member 105 embedded in the annular guide groove 104 and can slide along the annular path of the annular guide groove 104.

[0040] The annular guide groove 104 of the embodiment of the present application has a first locking position 106 and a second locking position 107 for clamping the plug-in sliding member 105. When the moving contact assembly 100 is closed, the push rod assembly 103 is driven to move linearly, so that the plug-in sliding member 105 is located at the first locking position 106; the first locking position 106 can clamp the plug-in sliding member 105, so that the load switch remains in the closed state. When the moving contact assembly 100 is opened, the push rod assembly 103 is driven to move linearly, so that the plug-in sliding member 105 is located at the second locking position 107, and the second locking position 107 can clamp the plug-in sliding member 105, so that the load switch remains in the open position. Compared with the prior art, the embodiment of the present application realizes state retention through a mechanical structure, so there is no need to continuously energize the contact in the normally open or normally closed state.

[0041] It should be noted that the annular guide groove 104 can be a groove that forms a closed loop structure, and one or more locking positions can be set in the annular guide groove according to actual needs. Figure 1-Figure 6The polygonal structure disclosed in the specification may also be a circular or elliptical structure, and those skilled in the art may configure it as required without any special limitation.

[0042] Furthermore, an elastic member is sandwiched between the push rod assembly 103 and the mounting seat 101. When the push rod assembly 103 moves linearly, it can drive the elastic member to stretch or compress. The elastic member can form an elastic force acting on the push rod assembly 103, and the direction of the elastic force is opposite to the linear movement direction 108. The provision of the elastic member can prevent the plug-in sliding member 105 from coming out of the locking position, and after the plug-in sliding member 105 is unlocked from the locking position, the plug-in sliding member 105 can quickly leave the locking position through the elastic force, effectively improving the stability of the mechanical holding mechanism. In this embodiment, the elastic member is a compression spring. Of course, in other embodiments, those skilled in the art can adjust it according to actual conditions, such as a tension spring, etc., which is not limited here.

[0043] Reference Figure 2 , Figure 3 as well as Figure 4 As shown, as an optional embodiment, the annular guide groove 104 includes a first V-shaped groove 109 and a second V-shaped groove 110 arranged along the linear movement direction 108 of the push rod assembly 103, and the openings of the first V-shaped groove 109 and the second V-shaped groove 110 are oriented in the same direction as the linear movement direction 108 and the bottoms are close to the hinged connection end of the swing rod 102; the first locking position 106 is arranged at the bottom of the first V-shaped groove 109, and the second locking position 107 is arranged at the bottom of the second V-shaped groove 110.

[0044] The embodiment of the present application discloses the specific structure of the annular guide groove 104. It should be noted that the first locking position 106 is arranged at the bottom of the first V-shaped groove 109, and the second locking position 107 is arranged at the bottom of the second V-shaped groove 110. The first V-shaped groove 109 is connected to the second V-shaped groove 110 on both sides through the side guide groove, so that the plug-in sliding member 105 can reciprocate in the first V-shaped groove 109, the side guide groove, and the second V-shaped groove 110.

[0045] Wherein, the side guide groove can be set as a V-shaped guide groove.

[0046] It should be noted that the plug-in sliding member 105 is clamped at the bottom of the first V-shaped groove 109 when in the closed position. When the switch needs to be opened, the push rod assembly 103 is driven to move in a direction away from the swing rod 102, so that the plug-in sliding member 105 slides toward one side of the first V-shaped groove 109 under the support of the inclined surface of the side wall of the first V-shaped groove 109, so that the plug-in sliding member 105 can slide out of the first V-shaped groove 109, thereby releasing the lock of the plug-in sliding member 105 by the first locking position 106.

[0047] It should be noted that the plug-in sliding member 105 is clamped at the bottom of the second V-shaped groove 110 when it is in the open position. When the switch needs to be closed, the driving push rod assembly 103 is moved in the direction close to the swing rod 102, so that the plug-in sliding member 105 slides toward one side of the second V-shaped groove 110 under the support of the inclined surface of the side wall of the second V-shaped groove 110, so that the plug-in sliding member 105 can slide out of the second V-shaped groove 110, thereby releasing the lock of the plug-in sliding member 105 by the second locking position 107.

[0048] Among them, the bottom of the first V-shaped groove 109 has a first protrusion 111 and a first recessed portion 112 respectively located on both sides of the plug-in sliding member 105 along the linear moving direction 108. When the plug-in sliding member 105 is located at the first recessed portion 112, the plug-in sliding member 105 is driven to abut against the first protrusion 111, so that the plug-in sliding member 105 slides to one side of the first V-shaped groove 109.

[0049] Reference Figure 2 , Figure 3 as well as Figure 4 As shown, specifically, the bottom of the first V-shaped groove 109 has a first protrusion 111 and a first recess 112 , and the plug-in sliding member 105 can be clamped by the first protrusion 111 and the first recess 112 to achieve the first clamping position clamping the plug-in sliding member 105 .

[0050] Among them, the bottom of the second V-shaped groove 110 has a second protrusion 113 and a second recessed portion 114 respectively located on both sides of the plug-in sliding member 105 along the linear moving direction 108. When the plug-in sliding member 105 is located at the second recessed portion 114, the plug-in sliding member 105 is driven to abut against the second protrusion 113, causing the plug-in sliding member 105 to slide toward one side of the second V-shaped groove 110.

[0051] Specifically, the bottom of the second V-shaped groove 110 has a second protrusion 113 and a second recess 114 , and the plug-in sliding member 105 can be clamped by the second protrusion 113 and the second recess 114 to achieve the clamping of the plug-in sliding member 105 at the second clamping position.

[0052] It should be noted that the first protrusion 111 and the first recessed portion 112 are respectively arranged on both sides of the linear moving direction 108, so that the plug-in sliding member 105 can slide to one side of the first V-shaped groove 109. Similarly, the second protrusion 113 and the second recessed portion 114 are respectively arranged on both sides of the linear moving direction 108, so that the plug-in sliding member 105 can slide to one side of the first V-shaped groove 109, thereby enabling the plug-in sliding member 105 to move in a circular manner in the annular guide groove 104.

[0053] The first protrusion 111 and the second protrusion 113 are both provided with arc chamfers to eliminate the structural dead point when the plug-in sliding member 105 abuts against them, so as to facilitate smooth abutting and sliding.

[0054] It should be noted that the second protrusion 113 and the second recess 114 may also be sequentially arranged in the linear moving direction 108 , so that the plug-in sliding member 105 can slide to any side of the second V-shaped groove 110 .

[0055] As an optional implementation, the plug-in sliding member 105 is a cylindrical rod whose extension direction is perpendicular to the plane where the annular guide groove 104 is located.

[0056] It should be noted that the cylindrical rod can cyclically move along its trajectory path in the annular guide groove 104 to achieve switching between the first locking position 106 and the second locking position 107 .

[0057] Reference Figure 5 as well as Figure 6 As shown, an embodiment of the present application provides a load switch, including a contact assembly 100, a driving mechanism and the above-mentioned mechanical holding mechanism. The driving mechanism of the embodiment of the present application includes an electromagnet 115 and an armature piece 116 located at the driving end of the electromagnet 115. One end of the armature piece 116 is connected to the push rod assembly 103 and the other end is connected to the contact assembly 100. The electromagnet 115 drives the push rod assembly 103 to move linearly by driving the armature.

[0058] Therefore, in the embodiment of the present application, when the contact assembly 100 is performing an opening and closing operation, the opening and closing state of the contact assembly 100 can be maintained through a mechanical holding mechanism, which can not only effectively reduce energy consumption, but also effectively improve product reliability.

[0059] Reference Figure 5 as well as Figure 6 As shown, as an optional embodiment, the driving mechanism also includes a fixed bracket 117, the middle part of the armature piece 116 is rotatably set on the fixed bracket 117, the driving end of the electromagnet 115 is located on the side of the armature piece 116 close to the push rod assembly 103, and the driving direction of the electromagnet 115 is consistent with the linear movement direction 108 of the push rod assembly 103.

[0060] The armature piece 116 of the embodiment of the present application is rotatably set on the fixed bracket 117 to form a lever structure, and the push rod assembly 103 and the moving contact are respectively arranged on both sides of the armature piece 116. The electromagnet 115 can drive the armature to rotate, so that the push rod assembly 103 and the moving contact at both ends of the armature piece 116 move in opposite directions.

[0061] Reference Figure 5 as well as Figure 6 As shown, as an optional embodiment, the push rod assembly 103 has a connecting hole 118, the opening of the connecting hole 118 is perpendicular to the linear moving direction 108, and the armature piece 116 is provided with a connector 119 that passes through the connecting hole 118.

[0062] It should be noted that the push rod assembly 103 is plug-connected to the armature piece 116, rather than hinged. The arc motion of the armature piece 116 can be converted into the linear motion of the push rod assembly 103 by plugging, ensuring the stable connection between the plug-in sliding member 105 and the annular guide groove 104.

[0063] Reference Figure 5 as well as Figure 6 As shown, as an optional embodiment, the contact assembly 100 includes a stationary contact structure 120 and a moving contact structure 121; a spring structure 122 is provided at one end of the armature piece 116 close to the stationary contact structure 120, and the moving contact structure 121 is installed on the spring structure 122, and the moving contact structure 121 can be elastically supported against the stationary contact structure 120 through the spring structure.

[0064] It also includes a wiring terminal 123 , and the moving contact structure 121 is connected to the wiring terminal 123 via a flexible connecting wire 124 .

[0065] The embodiment of the present application avoids using the spring structure 122 for current transmission, and the current passing strength can be greatly enhanced by the flexible connecting wire 124, which is beneficial to improving the safety of the device.

[0066] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mechanical holding mechanism, arranged in cooperation with a contact assembly in a load switch, characterized in that: The mechanical retaining mechanism includes a mounting seat, a swing rod and a push rod assembly slidably arranged on the mounting seat, the push rod assembly is provided with an annular guide groove, one end of the swing rod is hinged to the mounting seat, and the other end is provided with a plug-in sliding member embedded in the annular guide groove and capable of sliding along an annular path of the annular guide groove; the annular guide groove has a locking position for clamping the plug-in sliding member, and when the contact assembly is closed and / or opened, the push rod assembly is driven to move linearly so that the plug-in sliding member is located in the locking position.

2. The mechanical holding mechanism according to claim 1, characterized in that: An elastic member is sandwiched between the push rod assembly and the mounting seat. When the push rod assembly moves linearly, the elastic member can be driven to deform. The elastic member can form an elastic force acting on the push rod assembly, and the direction of the elastic force is opposite to the direction of linear movement.

3. The mechanical holding mechanism according to claim 1 or 2, characterized in that: The locking position includes a first locking position for locking and maintaining the closing, and the annular guide groove includes a first V-shaped groove and a second V-shaped groove arranged along the linear movement direction of the push rod assembly, the openings of the first V-shaped groove and the second V-shaped groove are oriented in the same direction as the linear movement direction and the bottom is close to the hinged connection end of the swing rod; the first locking position is arranged at the bottom of the first V-shaped groove.

4. The mechanical holding mechanism according to claim 3, characterized in that: The locking position also includes a second locking position for locking and maintaining the open gate, the second locking position is arranged at the bottom of the second V-shaped groove, the bottom of the first V-shaped groove has a first protrusion and a first recessed portion respectively located on both sides of the plug-in sliding member along the linear movement direction, when the plug-in sliding member is located at the first recessed portion, the plug-in sliding member is driven to abut against the first protrusion, so that the plug-in sliding member slides to one side of the first V-shaped groove.

5. The mechanical holding mechanism according to claim 3, characterized in that: The bottom of the second V-shaped groove has a second protrusion and a second recessed portion respectively located on both sides of the plug-in sliding member along the linear moving direction. When the plug-in sliding member is located at the second recessed portion, the plug-in sliding member is driven to abut against the second protrusion, so that the plug-in sliding member slides to one side of the second V-shaped groove.

6. The mechanical holding mechanism according to claim 3, characterized in that: The plug-in sliding member is a cylindrical rod whose extension direction is perpendicular to the plane where the annular guide groove is located.

7. A load switch, characterized in that: It includes a contact assembly, a driving mechanism and the mechanical retaining mechanism described in any one of claims 1 to 6, wherein the driving mechanism includes an electromagnet and an armature piece located at the driving end of the electromagnet, one end of the armature piece is connected to the push rod assembly, and the other end is connected to the contact assembly, and the electromagnet drives the push rod assembly to move linearly by driving the armature.

8. The load switch according to claim 7, characterized in that: The driving mechanism also includes a fixed bracket, the middle part of the armature piece is rotatably arranged on the fixed bracket, the driving end of the electromagnet is located on the side of the armature piece close to the push rod assembly, and the driving direction of the electromagnet is consistent with the linear movement direction of the push rod assembly.

9. The load switch according to claim 8, characterized in that: The push rod assembly is provided with a connecting socket, the opening of which is oriented perpendicular to the linear moving direction, and the armature piece is provided with a plug-in component penetrating the connecting socket.

10. The load switch according to any one of claims 7 to 9, characterized in that: The contact assembly includes a stationary contact structure and a moving contact structure; a spring structure is provided at one end of the armature sheet close to the stationary contact structure, the moving contact structure is mounted on the spring structure, and the moving contact structure can elastically resist the stationary contact structure through the spring structure.

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