Self-locking operation mechanism and electric leakage switch

Abstract

The invention provides a self-locking operating mechanism which comprises the components of an operating member which is movably arranged and comprises a working gear and a standby gear, and the operating member is switched between the standby gear and the working gear under the action of external force; the connecting rod assembly comprises an upper connecting rod, a middle connecting rod and a lower connecting rod of which one ends are mutually hinged together, and the other end of the upper connecting rod is hinged with the operating piece; the self-locking assembly comprises a limiting structure and a lock catch structure, the limiting structure comprises a rotationally arranged cam and a limiting rod, and the limiting rod comprises a limiting part and a jump pin matched with the lock catch structure; when the operating piece is switched towards a working gear, the upper connecting rod is driven to move downwards, the middle connecting rod and the lower connecting rod are driven to move downwards at the same time, the middle connecting rod drives the cam to rotate and abut against the limiting part, and the limiting rod rotates to drive the jump buckle and the lock catch structure to be clamped. The problem that precision and durability are greatly reduced due to the fact that an electric leakage switch in the prior art adopts an easy-to-deform metal component due to structural limitation is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit safety protection, and in particular to a self-locking operating mechanism and a leakage switch. Background Art

[0002] The leakage switch, also known as the leakage circuit breaker, is mainly used to protect against leakage faults in equipment and to protect people from fatal electric shock. It has an instantaneous tripping function and can be used to prevent fires or for infrequent switching of lines and infrequent starting of motors.

[0003] Due to structural limitations, existing leakage circuit breakers mostly use metal components. The operating mechanism composed of metal components has the following defects: (1) The dimensional consistency of metal components is poor during processing, which leads to increased friction resistance of the metal operating mechanism transmission parts and aggravated wear; (2) Metal components need to be fixed by riveting process, and the riveting process will produce debris and poor rivet flanging, resulting in increased riveting gap and the risk of increased loosening of riveted components; (3) Metal components are prone to deformation during use, which makes the matching relationship between the lock buckle and the jump buckle of the self-locking structure of the metal operating mechanism abnormal, and there is a risk that the metal operating mechanism cannot be unlocked or self-locked. The above defects will greatly reduce the precision and durability of the leakage circuit breaker. Therefore, there is a need for a leakage circuit breaker with better structural strength, which can meet the requirements of selecting materials with strong deformation resistance such as plastic. Summary of the invention

[0004] In view of the shortcomings of the prior art described above, the technical problem to be solved by the present invention is to provide a self-locking operating mechanism and a leakage switch, so as to solve the problem that the leakage switch in the prior art uses metal components due to structural strength limitations, and the precision and durability are greatly reduced due to the easy deformation of metal materials.

[0005] In order to solve the above technical problems, the present invention provides a self-locking operating mechanism, comprising:

[0006] An operating member, the operating member is movable and includes a working position and a standby position, and the operating member switches between the standby position and the working position under the action of an external force;

[0007] A connecting rod assembly, the connecting rod assembly comprising an upper connecting rod, a middle connecting rod and a lower connecting rod, the other end of the upper connecting rod being hinged to the operating member;

[0008] A self-locking component, the self-locking component includes a limiting structure and a locking structure, the limiting structure includes a rotatable cam and a limiting rod, wherein the cam rotates around a cam shaft integrally formed with the cam body, and the limiting rod includes a limiting portion and a jump buckle adapted to the locking structure; the cam is hinged to the other end of the middle connecting rod, and when the operating member switches to the working gear, it drives the upper connecting rod to move downward while driving the middle connecting rod and the lower connecting rod to move downward, the middle connecting rod drives the cam to rotate and abut against the limiting portion, and the rotation of the limiting rod drives the jump buckle and the locking structure to be clamped.

[0009] As a more preferred manner, the operating member is rotatably arranged, and the operating member is switched between the working gear and the standby gear by rotating.

[0010] As a more preferred embodiment, the self-locking operating mechanism also includes a first elastic member connected to the operating member, and the external force applied to the operating member overcomes the elastic force of the first elastic member to switch the operating member from the standby position to the working position; in this way, after the self-locking of the jump buckle and the lock buckle structure is released, the operating member can automatically reset to the standby position under the action of the first elastic member without the need for resetting, which greatly facilitates the use of the self-locking operating mechanism.

[0011] As a more preferred embodiment, the limiting structure also includes a second elastic member connected to the limiting rod, and the force applied by the cam to the limiting rod through the limiting portion overcomes the elastic force of the second elastic member to drive the limiting rod to rotate, and the second elastic member enables the cam and the limiting rod to maintain a close fit, thereby improving the structural stability; at the same time, after the self-locking of the jump buckle and the lock buckle structure is released, the limiting rod can automatically reset to its initial position under the action of the second elastic member without the need for resetting, which greatly facilitates the use of the self-locking operating mechanism.

[0012] As a more preferred embodiment, the self-locking operating mechanism also includes an unlocking structure, which is connected to the locking structure. The unlocking structure unlocks the locking structure under the action of an external force. When the unlocking structure unlocks the locking structure, the locking structure releases the jump buckle, and the cam lifts up the limit rod. The operating member switches to the standby gear position under the action of the first elastic member, driving the upper connecting rod and the middle connecting rod to rise, and the cam is reset under the drive of the middle connecting rod, and the limit rod is reset under the action of the second elastic member. The unlocking structure of the present invention can be used to unlock the locking structure, and at the same time, it also satisfies the self-locking structure to automatically reset to the initial position after the unlocking is completed without the need to re-set the self-locking structure, which greatly facilitates the use of the self-locking operating mechanism.

[0013] As a more preferred manner, the self-locking component also includes a third elastic member, the locking structure is movably arranged, and the third elastic member is connected to the locking structure. The external force applied to the unlocking structure overcomes the elastic force of the third elastic member to activate the locking structure and unlock the locking structure and the jump buckle. In this way, when there is no external force on the unlocking structure, the locking of the locking structure and the jump buckle is more secure. At the same time, when the external force of the unlocking structure is released, it can automatically reset to the initial position that can cooperate with the jump buckle for self-locking without resetting, which greatly facilitates the use of the self-locking operating mechanism.

[0014] As a more preferred embodiment, the self-locking operating mechanism also includes a reset structure, which includes a fourth elastic member arranged below the unlocking structure and the operating member, the fourth elastic member is a torsion spring, the force arm of the torsion spring abuts against the lower part of the operating member and is limited by the operating member, when the unlocking structure unlocks the lock structure and the operating member switches to the standby gear position under the action of the first elastic member, the limit of the force arm of the torsion spring is released and moves upward to contact the unlocking structure, the unlocking structure is lifted up and reset, and at the same time, the lock structure is reset under the action of the third elastic member; in this way, after the unlocking is completed, the self-locking operating mechanism of the present invention automatically resets the unlocking mechanism to the initial position through the reset structure, and when the operating member is set to the working gear again, the unlocking structure can continue to unlock the lock structure and repeat the above cycle without resetting, which greatly facilitates the use of the self-locking operating mechanism.

[0015] As a more preferred embodiment, the self-locking operating mechanism also includes a shell, which includes an upper shell, a lower shell and an inner cavity enclosed by the upper shell and the lower shell, and the operating member is movably arranged on the lower shell and extends out of the inner cavity; the connecting rod assembly and the self-locking assembly are arranged in the inner cavity, and the cam and the limit rod are rotatably arranged on the lower shell, and the shell is used to encapsulate and protect internal components to improve the stability of the operation of the self-locking operating mechanism.

[0016] In order to solve the above problem, the present invention further provides a leakage switch, comprising:

[0017] The above-mentioned self-locking operating mechanism;

[0018] A contact assembly, wherein the contact assembly includes a fixed static contact and a moving contact adapted to the static contact, the moving contact can be rotatably arranged and connected to the other end of the lower connecting rod; when the leakage switch is working normally, the operating member is located in the working gear, and the self-locking assembly locks the operating member, the lower connecting rod drives the moving contact to contact the static contact, the leakage switch is in a closed state, and the leakage switch is opened; when leakage occurs, the self-locking balance of the self-locking assembly is broken, the operating member is switched to the standby gear, the lower connecting rod drives the moving contact to separate from the static contact, the leakage switch is in an open state, and the leakage switch is closed.

[0019] As a more preferred embodiment, the leakage switch also includes a release. In the closed state, when the release detects a leakage current that reaches and exceeds a certain preset threshold, the release applies an external force to the lock structure to make the tripper disengage from the lock structure. The leakage switch is switched from the closed state to the open state. The release is used as a trigger device for closing the leakage switch. The structure is small and easy to assemble. At the same time, the release is very sensitive to the detection of leakage current, thereby improving the performance of the leakage switch.

[0020] As described above, the self-locking operating mechanism and leakage switch of the present invention have the following beneficial effects: when the self-locking operating mechanism of the present invention is in use, the user switches the switch from the standby gear to the working gear by pulling the operating member. During this process, the operating member drives the middle connecting rod and the lower connecting rod to move respectively through the upper connecting rod. At the same time, the self-locking component connected to the middle connecting rod drives the limit rod to rotate through the rotation of the cam, and makes the jump buckle on the limit rod lift up and clamp the lock buckle structure, so that the self-locking operating mechanism of the present invention completes self-locking; when the leakage switch of the present invention is in use, when the leakage switch is working normally, the operating member is located in the working gear, and the self-locking component locks the operating member, and the lower connecting rod drives the moving contact to contact the static contact, the leakage switch is in a closed state, and the leakage switch is opened; when leakage occurs, the self-locking balance of the self-locking component is broken, and the operating member switches to the standby gear. Working position, the lower connecting rod drives the moving contact to separate from the static contact, the leakage switch is in the open state, and the leakage switch is closed; the self-locking operating mechanism and the leakage switch of the present invention realize the self-locking of the operating member in the working position through the locking mechanism and the rotatably arranged cam and limit rod. At the same time, when leakage occurs, the self-locking balance is released to achieve the effect of switching the operating member to the waiting position. In the present invention, the cam realizes the rotation of the cam through the cam shaft integrally formed with the cam body. Different from the traditional leakage switch that rotates on a metal shaft pin through a split cam, the cam and the integrally formed cam shaft of the present invention have higher structural strength, so that materials with better deformation resistance, such as plastics, can be selected, which solves the problem that the leakage switch in the prior art uses metal components due to structural strength limitations, and the precision and durability are greatly reduced due to poor dimensional consistency and easy deformation of metal materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram showing an operating member of the self-locking operating mechanism of the present invention in a standby position;

[0022] Figure 2 A schematic diagram showing an operating member of the self-locking operating mechanism of the present invention in a working gear position;

[0023] Figure 3 It is a schematic diagram showing the opening of the leakage switch of the present invention.

[0024] Component number description

[0025] 1 Self-locking operating mechanism

[0026] 11 Operating parts

[0027] 12 Connecting rod assembly

[0028] 121 Upper connecting rod

[0029] 122 Middle connecting rod

[0030] 123 Lower connecting rod

[0031] 13 Self-locking components

[0032] 131 Cam

[0033] 132 Limit rod

[0034] 132a Limiting part

[0035] 132b Jump Button

[0036] 133 Lock structure

[0037] 14 Unlocking Structure

[0038] 141 Trigger

[0039] 142 Unlocking Department

[0040] 15 Fourth elastic member

[0041] 16 Housing

[0042] 161 Upper shell

[0043] 162 lower shell

[0044] 162a First axis

[0045] 162b Second axis

[0046] 162c Third axis

[0047] 162d Fourth Revolving Axis

[0048] 162e Cam shaft

[0049] 162f Unlock the shaft

[0050] 17 Fifth elastic member

[0051] 2 Contact assembly

[0052] 21 Stationary contact

[0053] 22 Moving contact

[0054] 3 Trip unit

[0055] 31 Ejector DETAILED DESCRIPTION

[0056] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0057] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0058] like Figure 1 , Figure 2 as well as Figure 3 As shown, the present invention provides a self-locking operating mechanism 1, comprising:

[0059] An operating member 11, wherein the operating member 11 is movably arranged and includes a working gear and a standby gear, and the operating member 11 switches between the standby gear and the working gear under the action of an external force;

[0060] The connecting rod assembly 12 includes an upper connecting rod 121, a middle connecting rod 122 and a lower connecting rod 123, which are hinged to each other at one end, and the other end of the upper connecting rod 121 is hinged to the operating member 11;

[0061] The self-locking component 13 includes a limiting structure and a locking structure 133, wherein the limiting structure includes a rotatable cam 131 and a limiting rod 132, wherein the cam 13 rotates around a cam shaft 162e integrally formed with the cam body, and the limiting rod 132 includes a limiting portion 132a and a jump buckle 132b adapted to the locking structure 133; the cam 131 is hinged to the other end of the middle connecting rod 122, and when the operating member 11 switches to the working gear, it drives the upper connecting rod 121 to move downward while driving the middle connecting rod 122 and the lower connecting rod 123 to move downward, and the middle connecting rod 122 drives the cam 131 to rotate and abut against the limiting portion 132a, and the limiting rod 132 rotates to drive the jump buckle 132b to clamp with the locking structure 133.

[0062] When the self-locking operating mechanism 1 of the present invention is in use, the user switches from the standby gear to the working gear by pulling the operating member 11. During this process, the operating member 11 drives the middle connecting rod 122 and the lower connecting rod 123 to move respectively through the upper connecting rod 121. At the same time, the self-locking component 13 connected to the middle connecting rod 122 drives the limit rod 132 to rotate through the rotation of the cam 131, and makes the jump buckle 132b on the limit rod 132 push up and clamp the lock buckle structure 133, so that the self-locking operating mechanism 1 of the present invention completes self-locking.

[0063] In this embodiment, if Figure 1 as well as Figure 2 As shown, the self-locking operating mechanism 1 also includes a shell 16, which includes an upper shell 161, a lower shell 162, and an inner cavity enclosed by the upper shell 161 and the lower shell 162. The operating member 11 is movably arranged on the lower shell 162 and extends out of the inner cavity; the connecting rod assembly 12 and the self-locking assembly 13 are arranged in the inner cavity, and the cam 131 and the limit rod 132 are rotatably arranged on the lower shell 162. The shell 16 is used to encapsulate and protect the internal components to improve the stability of the operation of the self-locking operating mechanism 1; further, in this embodiment, as Figure 1 as well as Figure 2 As shown, the limit rod 132 is sleeved on the second rotating shaft 162b on the lower shell 162, and the cam rotating shaft 162e is arranged below the second rotating shaft 162b. The limit portion 132a is located at the lower part of the limit rod 132. When the operating member 11 switches to the working gear, it drives the upper connecting rod 121 to move downward while driving the middle connecting rod 122 and the lower connecting rod 123 to move downward. The middle connecting rod 122 drives the cam 131 to rotate clockwise and abut against the limit portion 132a.

[0064] In this embodiment, if Figure 1 as well as Figure 2 As shown, the operating member 11 is sleeved on the first rotating shaft 162a on the lower shell 162, and the operating member 11 is switched between the working gear and the standby gear by rotating; further, in this embodiment, as Figure 1 as well as Figure 2 As shown, the first rotating shaft 162a is disposed on the right side of the second rotating shaft 162b.

[0065] In this embodiment, if Figure 1 as well as Figure 2As shown, the self-locking operating mechanism 1 also includes a first elastic member connected to the operating member 11, and the external force applied to the operating member 11 overcomes the elastic force of the first elastic member to switch the operating member 11 from the standby position to the working position; in this way, after the self-locking of the jump buckle 132b and the lock buckle structure 133 is released, the operating member 11 can be automatically reset to the standby position under the action of the first elastic member without resetting, which greatly facilitates the use of the self-locking operating mechanism 1; further, in this embodiment, as Figure 1 as well as Figure 2 As shown, the first elastic member is a torsion spring, which is sleeved on the first rotating shaft 162a, and the force arm of the torsion spring abuts against the operating member 11, and the force arm applies a force to the operating member 11 to rotate clockwise.

[0066] In this embodiment, if Figure 1 as well as Figure 2 As shown, the limiting structure also includes a second elastic member connected to the limiting rod 132, and the force applied by the cam 131 to the limiting rod 132 through the limiting portion 132a overcomes the elastic force of the second elastic member to drive the limiting rod 132 to rotate, and the second elastic member enables the cam 131 and the limiting rod 132 to maintain a close fit, thereby improving the stability of the structure; at the same time, after the self-locking of the jump buckle 132b and the locking structure 133 is released, the limiting rod 132 can be automatically reset to the initial position under the action of the second elastic member without resetting, which greatly facilitates the use of the self-locking operating mechanism 1; further, in this embodiment, Figure 1 as well as Figure 2 As shown, the second elastic member is a torsion spring, which is sleeved on the second rotating shaft 162b, and the force arm of the torsion spring abuts against the limiting rod 132, and the force arm applies a force to the operating member 11 to rotate clockwise.

[0067] In this embodiment, if Figure 1 as well as Figure 2As shown, the self-locking operating mechanism 1 also includes an unlocking structure 14, which is connected to the locking structure 133. The unlocking structure 14 unlocks the locking structure 133 under the action of an external force. When the unlocking structure 14 unlocks the locking structure 133, the locking structure 133 releases the jump buckle 132b, and the cam 131 lifts the limit rod 132. The operating member 11 switches to the standby gear under the action of the first elastic member, driving the upper connecting rod 121 and the middle connecting rod 122 to rise, and the cam 131 is reset under the drive of the middle connecting rod 122. At the same time, the limit rod 132 is reset under the action of the second elastic member; the unlocking structure 14 of the present invention can be used to unlock the locking structure 133, and at the same time, it satisfies the self-locking structure to automatically reset to the initial position after the unlocking is completed, without the need to re-set the self-locking structure, which greatly facilitates the use of the self-locking operating mechanism 1; further, in this embodiment, Figure 1 as well as Figure 2 As shown, the unlocking structure 14 also includes an unlocking shaft 162f which is integrally formed with the unlocking structure 14. The unlocking shaft 162f is rotatably arranged on the lower shell 162. The unlocking shaft 162f is arranged on the lower right side of the first shaft 162a. In this embodiment, the unlocking shaft 162f is integrally formed with the unlocking structure 14, which enhances the overall structure of the unlocking structure 14 and also makes the rotation of the unlocking structure 14 more sensitive.

[0068] In this embodiment, if Figure 1 as well as Figure 2 As shown, the self-locking component 13 also includes a third elastic member, and the locking structure 133 is rotatably mounted on the third rotating shaft 162c on the lower shell body 162, and the third rotating shaft 162c is arranged on the right side of the unlocking rotating shaft 162f, and the third elastic member is connected to the locking structure 133, and the external force applied to the unlocking structure 14 overcomes the elastic force of the third elastic member to make the locking structure 133 move, and unlock the locking structure 133 and the jump buckle 132b; in this way, when there is no external force on the unlocking structure 14, the locking of the locking structure 133 and the jump buckle 132b is more firmly, and at the same time, when the external force of the unlocking structure 14 is released, it can automatically reset to the initial position that can cooperate with the jump buckle 132b for self-locking, without the need for resetting, which greatly facilitates the use of the self-locking operating mechanism 1.

[0069] Furthermore, in this embodiment, if Figure 1 as well as Figure 2As shown, the third elastic member adopts a torsion spring, which is sleeved on the third rotating shaft 162c, and the force arm of the torsion spring abuts against the locking structure 133, and the force arm applies a force to the locking structure 133 to rotate clockwise; the unlocking structure 14 includes a trigger part 141 and an unlocking part 142 integrally formed with the trigger part 141, and the unlocking part 142 is connected to the locking structure 133. When the trigger part 141 is subjected to external force, the unlocking structure 14 rotates counterclockwise around the unlocking rotating shaft 162f, and applies a counterclockwise unlocking force to the locking structure 133 through the unlocking part 142, and the unlocking force overcomes the elastic force applied to the locking structure 133 by the third elastic member, drives the locking structure 133 to rotate counterclockwise, so that the jump buckle 132b is disengaged from the locking structure 133, and at the same time, the limiting rod 132 automatically resets to the initial position under the action of the second elastic member.

[0070] In this embodiment, if Figure 1 as well as Figure 2 As shown, the self-locking operating mechanism 1 also includes a reset structure, which includes a fourth elastic member 15 arranged below the unlocking structure 14 and the operating member 11. The fourth elastic member 15 adopts a torsion spring, and the torsion spring is sleeved on the fourth rotating shaft 162d on the lower shell 162. The force arm of the torsion spring abuts against the lower part of the operating member 11 and is limited by the operating member 11. When the unlocking structure 14 unlocks the lock structure 133, the operating member 11 switches to the standby gear under the action of the first elastic member, and the limit of the force arm of the torsion spring is released. And moves upward to contact the unlocking structure 14, the unlocking structure 14 rotates clockwise and resets under the action of the fourth elastic member 15, and the locking structure 133 is reset under the action of the third elastic member; in this way, after the self-locking operating mechanism 1 of this embodiment is unlocked, the unlocking mechanism is automatically reset to the initial position through the resetting structure, and when the operating member 11 is set to the working gear again, the unlocking structure 14 can continue to unlock the locking structure 133 and repeat the above cycle without resetting, which greatly facilitates the use of the self-locking operating mechanism 1.

[0071] In order to solve the above problems, Figure 3 As shown, the present invention also provides a leakage switch, comprising:

[0072] The above-mentioned self-locking operating mechanism 1;

[0073] The contact assembly 2 comprises a fixed static contact 21 and a moving contact 22 matched with the static contact 21, wherein the moving contact 22 can be rotatably arranged and connected to the other end of the lower connecting rod 123; when the leakage switch is working normally, the operating member 11 is located in the working gear, and the self-locking assembly 13 locks the operating member 11, and the lower connecting rod 123 drives the moving contact 22 to contact the static contact 21, and the leakage switch is in the closed state, and the leakage switch is opened; when leakage occurs, the self-locking balance of the self-locking assembly 13 is broken, the operating member 11 is switched to the standby gear, and the lower connecting rod 123 drives the moving contact 22 to separate from the static contact 21, and the leakage switch is in the open state, and the leakage switch is closed.

[0074] In this embodiment, if Figure 3 As shown, the leakage switch also includes a tripper 3. In the closed state, when the tripper 3 detects a leakage current whose size reaches and exceeds a certain preset threshold, the tripper 3 is instantly tripped, and the thrust pushed out by the push rod 31 in the tripper 3 is applied to the unlocking structure 141, which is converted into an external force applied to the locking structure 133 through the third rotating shaft 162c, so that the tripper 132b is disengaged from the locking structure 133, and the leakage switch is switched from the closed state to the open state, and the tripper 3 is used as a trigger device for closing the leakage switch. The structure is compact and easy to assemble, and the tripper 3 is very sensitive to the detection of leakage current, thereby improving the performance of the leakage switch; further, in this embodiment, as Figure 3As shown, the release 3 is fixed to the outer side of the housing 16, the triggering portion 141 of the unlocking structure 14 extends out from the triggering hole opened on the upper housing 161, and the ejector 31 of the release 3 for triggering the triggering portion 141 is arranged above the triggering portion 141 and directly facing the triggering portion 141. When the release 3 detects a leakage current, the ejector 31 of the release 3 pushes out and contacts the triggering portion 141, and the unlocking structure 14 rotates counterclockwise, driving the unlocking portion 142 to rotate counterclockwise, and at the same time, the unlocking portion 142 applies force to the locking structure 13 3, overcomes the elastic force applied to the lock structure 133 by the third elastic member and rotates counterclockwise, thereby causing the jump buckle 132b to escape from the lock structure 133, breaking the self-locking balance; at the same time, the operating member 11 is reset to the standby position under the action of the first elastic member, and at the same time drives the upper connecting rod 121, the middle connecting rod 122 and the lower connecting rod 123 to reset, the middle connecting rod 122 drives the cam 131 connected to the middle connecting rod 122 to reset, and the lower connecting rod 123 drives the moving contact 22 connected to the lower connecting rod 123 to separate from the static contact 21, The leakage switch is in the off state; at the same time, since the trip button 132b is disengaged from the lock structure 133, the limit rod 132 is lifted up by the cam 131 and rotates counterclockwise, and when the cam 131 bypasses the lower part of the limit rod 132, the limit rod 132 rotates clockwise and resets under the action of the second elastic member; at this time, since the operating member 11 is reset to the standby gear position, the fourth elastic member 15 is released because the limit of the operating member 11 in the working gear position, the force arm of the fourth elastic member 15 rotates clockwise and contacts the unlocking structure 14, driving the unlocking structure 14 to The fourth elastic member 15 rotates clockwise under the action of the fourth elastic member 15, and the trigger portion 141 rotates clockwise and contacts the push rod 31, and pushes the push rod 31 back to reset the releaser 3; then, when the user switches the operating member 11 to the working gear, the self-locking component 13 can lock the self-locking operating mechanism 1 again, and when leakage occurs, the releaser 3 can trigger the unlocking structure 14 again to destroy the self-locking balance and cut off the power. In this way, there is no need to reset the recovery structure after each opening and closing cycle, which greatly facilitates the use of the leakage switch.

[0075] Furthermore, in this embodiment, if Figure 1 as well as Figure 2As shown, the unlocking structure 14 also includes a fifth elastic member 17, and the fifth elastic member 17 is a torsion spring. The torsion spring is sleeved on the unlocking shaft 162f, and the fixed end of the torsion spring is fixed to the lower shell 162. The force arm of the torsion spring is against the bottom of the trigger part 141, and applies a clockwise rotation elastic force to the unlocking structure 14; when the leakage switch is in a closed state, the operating rod 11 is in a working gear, and the elastic force applied by the fifth elastic member 17 to the unlocking structure 14 lifts the trigger part 141 and makes it close to the push rod 31, so that when the release 3 detects a leakage current that reaches and exceeds a certain preset threshold, the push rod 31 can contact the trigger part in the first time, unlock the lock structure 133, and further improve the sensitivity of the leakage switch.

[0076] In summary, the self-locking operating mechanism and the leakage switch of the present invention realize the self-locking of the operating member 11 in the working position through the locking mechanism and the rotatably arranged cam 131 and the limit rod 132. At the same time, when leakage occurs, the operating member 11 is switched to the standby position by releasing the self-locking balance. In the present invention, the cam 131 realizes the rotation of the cam 131 through the cam shaft 162e integrally formed with the cam body. Different from the solution that the traditional leakage switch rotates on the metal shaft pin through the split cam, the cam 131 and the integrally formed cam shaft 162e of the present invention have higher structural strength. Therefore, the leakage switch of the present invention can select a material with better deformation resistance, such as plastic, etc. At the same time, when the metal shaft pin is assembled with the shell, the gap between the metal shaft pin and the shell will also cause the long-term movement between the movable parts to slowly deform and expand due to process defects, further affecting the tightness of the leakage switch, thereby solving the problem that the leakage switch in the prior art uses metal components due to structural limitations, and the precision and durability are greatly reduced due to poor dimensional consistency and deformation of the metal material. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0077] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A self-locking operating mechanism, characterized in that: include: An operating member (11), the operating member (11) being movably arranged and comprising a working gear and a standby gear, and the operating member (11) being switched between the standby gear and the working gear under the action of an external force; A connecting rod assembly (12), the connecting rod assembly (12) comprising an upper connecting rod (121), a middle connecting rod (122) and a lower connecting rod (123) which are hinged to each other at one end, and the other end of the upper connecting rod (121) is hinged to the operating member (11); A self-locking component (13), the self-locking component (13) comprising a limiting structure and a locking structure (133), the limiting structure comprising a rotatably arranged cam (131) and a limiting rod (132), wherein the cam (131) is rotated by a cam shaft (162e) integrally formed with the cam body, the limiting rod (132) comprising a limiting portion (132a) and a jump buckle (132b) adapted to the locking structure (133); the cam (131) is rotated by a cam shaft (162e) integrally formed with the cam body, and the limiting rod (132) comprises a limiting portion (132a) and a jump buckle (132b) adapted to the locking structure (133); 1) is hinged to the other end of the middle connecting rod (122), and when the operating member (11) switches to the working gear, it drives the upper connecting rod (121) to move downward while driving the middle connecting rod (122) and the lower connecting rod (123) to move downward, and the middle connecting rod (122) drives the cam (131) to rotate and abut against the limiting portion (132a), and the limiting rod (132) rotates to drive the jump buckle (132b) to clamp with the locking structure (133).

2. The self-locking operating mechanism according to claim 1, characterized in that: The operating member (11) is rotatably arranged, and the operating member (11) is switched between the working gear position and the standby gear position by rotating.

3. The self-locking operating mechanism according to claim 2, characterized in that: The self-locking operating mechanism (1) further comprises a first elastic member connected to the operating member (11), and an external force applied to the operating member (11) overcomes the elastic force of the first elastic member to switch the operating member (11) from the standby gear position to the working gear position.

4. The self-locking operating mechanism according to claim 3, characterized in that: The limiting structure also includes a second elastic member connected to the limiting rod (132), and the force applied by the cam (131) to the limiting rod (132) through the limiting portion (132a) overcomes the elastic force of the second elastic member to drive the limiting rod (132) to rotate.

5. The self-locking operating mechanism according to claim 4, characterized in that: The self-locking operating mechanism (1) further comprises an unlocking structure (14), wherein the unlocking structure (14) is connected to the locking structure (133), and the unlocking structure (14) unlocks the locking structure (133) under the action of an external force. When the unlocking structure (14) unlocks the locking structure (133), the locking structure (133) releases the jump buckle (132b), and the cam (131) lifts the limit rod (132). Under the action of the first elastic member, the operating member (11) switches to the standby gear position, driving the upper connecting rod (121) and the middle connecting rod (122) to rise. The cam (131) is reset under the drive of the middle connecting rod (122), and the limit rod (132) is reset under the action of the second elastic member.

6. The self-locking operating mechanism according to claim 5, characterized in that: The self-locking component (13) further comprises a third elastic member, the locking structure (133) is movably arranged, the third elastic member is connected to the locking structure (133), and the external force applied to the unlocking structure (14) overcomes the elastic force of the third elastic member to cause the locking structure (133) to move, and unlocks the locking structure (133) and the jump buckle (132b).

7. The self-locking operating mechanism according to claim 6, characterized in that: The self-locking operating mechanism (1) also includes a reset structure, which includes a fourth elastic member (15) arranged below the unlocking structure (14) and the operating member (11), the fourth elastic member (15) adopts a torsion spring, the force arm of the torsion spring abuts against the lower part of the operating member (11) and is limited by the operating member (11), when the unlocking structure (14) unlocks the lock structure (133), and the operating member (11) switches to the standby gear under the action of the first elastic member, the limit of the force arm of the torsion spring is released and moves upward to contact the unlocking structure (14), the unlocking structure (14) is lifted up and reset, and at the same time, the lock structure (133) is reset under the action of the third elastic member.

8. The self-locking operating mechanism according to claim 1, characterized in that: The self-locking operating mechanism (1) also includes a shell (16), the shell (16) includes an upper shell (161), a lower shell (162) and an inner cavity enclosed by the upper shell (161) and the lower shell (162), the operating member (11) is movably arranged on the lower shell (162) and extends out of the inner cavity; the connecting rod assembly (12) and the self-locking assembly (13) are arranged in the inner cavity, and the cam (131) and the limit rod (132) are rotatably arranged on the lower shell (162).

9. A leakage switch, characterized in that: include: The self-locking operating mechanism (1) according to any one of claims 1 to 8; A contact assembly (2), the contact assembly (2) comprising a fixed static contact (21) and a movable contact (22) adapted to the static contact (21), the movable contact (22) being rotatably arranged and connected to the other end of the lower connecting rod (123); when the leakage switch is working normally, the operating member (11) is located at the working gear position, and the self-locking assembly (13) locks the operating member (11), the lower connecting rod (123) drives the movable contact (22) to contact the static contact (21), the leakage switch is in a closed state, and the leakage switch is opened; when leakage occurs, the self-locking balance of the self-locking assembly (13) is broken, the operating member (11) is switched to the standby gear position, the lower connecting rod (123) drives the movable contact (22) to separate from the static contact (21), the leakage switch is in an open state, and the leakage switch is closed.

10. The leakage switch according to claim 9, characterized in that: The leakage switch also includes a tripper (3), which in a closed state, when the tripper (3) detects a leakage current whose magnitude reaches and exceeds a certain preset threshold value, the tripper (3) applies an external force to the lock structure (133), causing the tripper (132b) to escape from the lock structure (133), and the leakage switch is switched from the closed state to the open state.

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