Manual tripping mechanism of leakage protection device

Abstract

The utility model relates to a manual tripping mechanism of a leakage protection device, which comprises an upper cover and a base which are covered with each other, a swing seat is movably arranged between the upper cover and the base, movable contact pieces are arranged on the left side and the right side of the swing seat, static contact pieces are arranged on the upper cover on the upper sides of the rear ends of the two movable contact pieces, and a lock catch seat is arranged on the front side of the swing seat. The upper end of the lock catch seat is rotatably matched on the upper cover, the lower end of the lock catch seat penetrates out of the base downwards, the lock catch seat is provided with a limiting step used for limiting the front side of the swing seat, and the lower side of the base is fixedly provided with a trip coil which is internally and movably matched with an ejector pin. One end of the ejector pin penetrates out of the tripping coil and is fixedly connected with a sliding ring facing the rear side of the lower end of the lock catch seat, and the upper cover is provided with a manual tripping button used for pushing the sliding ring to move forwards. The quick and reliable tripping action is realized, and the safety and multifunctionality of the product are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit protection, in particular to a manual tripping mechanism of a leakage protection device. Background Art

[0002] A leakage protection device is a safety electrical appliance used to detect the residual current in a circuit and automatically cut off the power supply when a leakage fault occurs. It is widely used in household, industrial and public power distribution systems to prevent safety accidents such as electric shock and electrical fires.

[0003] Existing leakage protection devices generally include a housing structure, a contact system, a locking mechanism and a tripping drive assembly. Among them, the tripping mechanism mainly includes an electromagnetic tripping component. After detecting the leakage signal through a current transformer, the tripping coil is triggered to act, thereby pushing a sliding member to unlock the locking mechanism, driving a swing seat to rotate, separating the moving contact from the static contact, and achieving the purpose of power-off protection.

[0004] However, in the actual use process, due to possible situations such as control circuit failure, coil damage or signal misjudgment in the electromagnetic tripping component, the automatic tripping function cannot be normally executed. If the faulty circuit cannot be disconnected in time at this time, there will be a greater safety hazard. Therefore, it is necessary to add a reliable manual tripping method on the basis of the existing automatic tripping mechanism, so that under the condition of automatic tripping failure or special operation requirements, users can quickly disconnect the circuit through manual operation, improving the safety and functionality of the product.

[0005] At present, some leakage protection devices are provided with manual tripping buttons, but their structural design is relatively complex, the transmission path is long, the operation is not sensitive enough, and the linkage with the original electromagnetic tripping component is poor, affecting the stability and reliability of the overall operation.

[0006] In summary, there is an urgent need to provide a manual tripping mechanism with a simple structure, convenient operation, rapid response and good cooperation with the electromagnetic tripping component, so as to improve the safety performance and use convenience of the leakage protection device under various working conditions. Summary of the Utility Model

[0007] The utility model provides a manual tripping mechanism of a leakage protection device, which has a simple structure, convenient operation, rapid response and good cooperation with the electromagnetic tripping component, and solves the above problems existing in the prior art during use.

[0008] The technical solution of the present utility model is realized as follows: A manual tripping mechanism of a leakage protection device includes an upper cover and a base that are covered with each other. A swing seat is movably arranged between the upper cover and the base. Moving contact pieces are arranged on both the left and right sides of the swing seat. Static contact pieces are arranged on the upper sides of the rear ends of the two moving contact pieces on the upper cover. A lock seat is arranged on the front side of the swing seat. The upper end of the lock seat is rotatably fitted on the upper cover and the lower end passes through the base downward. A limiting step for limiting the front side of the swing seat is formed on the lock seat. When the front side of the swing seat is located within the limiting step, the moving contact piece is in contact with the static contact piece. A tripping coil is fixedly arranged on the lower side of the base. A thimble is movably fitted within the tripping coil. One end of the thimble passes through the tripping coil and is fixedly connected with a sliding ring. The sliding ring is correspondingly oriented towards the rear side of the lower end of the lock seat. A manual tripping button for pushing the sliding ring to move forward is arranged on the upper cover.

[0009] Preferably, the thimble passes through the rear side of the tripping coil. Both the left and right sides of the sliding ring are slidably fitted on the left and right sides of the tripping coil. The front side of the sliding ring abuts against the lower end of the lock seat. The rear side of the sliding ring is used for cooperating with the manual tripping button.

[0010] Preferably, an arc-shaped pushing surface is formed on the rear side of the sliding ring. The manual tripping button is movably fitted up and down on the upper cover. The manual tripping button includes a tripping push rod that extends downward and passes through the base. An inclined guide surface for abutting against the arc-shaped pushing surface is arranged at the bottom of the tripping push rod.

[0011] Preferably, a connecting bayonet is formed on the rear side of the sliding ring. A clamping block located within the bayonet is integrally connected to the rear end of the thimble. An upper limiting block for abutting against the upper side of the clamping block is integrally formed on the upper side of the connecting bayonet of the sliding ring. The left and right sides of the tripping coil include lower convex platforms located on the lower side of the sliding ring. The sliding ring is slidably fitted on the upper side of the lower convex platforms. A front limiting block for abutting against the front side of the tripping coil is arranged at the front side position of the sliding ring. A thimble spring is arranged within the thimble and the tripping coil. The thimble spring is used for pushing the thimble to move backward.

[0012] Preferably, a moving contact point is connected to the rear end of the moving contact piece. A static contact point for contacting the moving contact point is arranged on the static contact piece. Contact spaces for accommodating the moving contact points and the static contact points on the left and right sides are respectively formed at the left and right sides of the rear part inside the upper cover. A tripping operation opening for allowing the tripping push rod to pass through is further formed between the two contact spaces at the rear part inside the upper cover.

[0013] Preferably, a lock spring is arranged between the front side of the lock seat and the upper cover. The lock spring is used for pushing the lock seat to abut against the swing seat.

[0014] Preferably, the middle part of the swing seat is movably fitted inside the upper cover. A first spring is provided between the base and the swing seat near its front side position. A reset button is movably arranged on the upper cover, and the reset button includes a reset push rod located above the swing seat.

[0015] In summary, the beneficial effects of the present utility model are as follows:

[0016] 1. Through this manual tripping button, in the case of the failure of the coil tripping mechanism or in special situations, the user can directly manually operate to disconnect the circuit, realizing fast and reliable tripping actions, and improving the safety and versatility of the product.

[0017] 2. The manual tripping and electromagnetic tripping of the present utility model share the same sliding ring for tripping, simplifying the overall structure, improving the space utilization rate and action consistency, and ensuring smooth switching and reliable actions between the manual and automatic tripping methods.

[0018] 3. An arc-shaped pushing surface is provided at the rear side of the sliding ring. The manual tripping button is provided with a tripping push rod extending downward, and the bottom of the tripping push rod is provided with an inclined guide surface, which cooperates with the arc-shaped pushing surface. This structural design realizes stable transmission between the manual tripping button and the sliding ring, enables the operating force to be efficiently transmitted to the sliding ring, thereby pushing the locking seat to complete the tripping action, and improving the sensitivity and operating feel of the manual tripping.

[0019] 4. A connecting bayonet is provided at the rear side of the sliding ring, a clamping block is provided at the rear end of the ejector pin, and the clamping block is embedded in the bayonet. At the same time, an upper limit block is provided on the sliding ring, a lower convex platform and a front limit block are provided on the tripping coil, and an ejector pin spring is arranged between the ejector pin and the tripping coil. This structure enhances the connection stability between the sliding ring and the ejector pin, prevents loosening and falling off, and at the same time ensures the accurate running track of the sliding ring through multiple limit structures, improving the reliability and repeatability of the tripping action.

[0020] 5. The moving contact and the static contact are arranged in the contact space at the rear of the upper cover. A tripping operation port for the tripping push rod to pass through is provided between the two contact spaces. This design reasonably arranges the internal space, avoids interference between the manual tripping push rod and other components, is convenient for installation and maintenance, and also ensures that the tripping push rod can smoothly push the sliding ring to perform the tripping operation, improving the compactness and practicality of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 Schematic cross-sectional structure diagram of the present utility model;

[0023] Figure 2 First three-dimensional structure diagram of the present utility model;

[0024] Figure 3 Second three-dimensional structure diagram of the present utility model;

[0025] Figure 4 Third three-dimensional structure diagram of the present utility model;

[0026] Figure 5 Structure diagram of the present utility model after removing the upper cover and the base;

[0027] Figure 6 Cooperating structure diagram of the swing seat, the moving contact piece and the locking seat in the present utility model;

[0028] Figure 7 is Figure 6 exploded structure diagram of the structure;

[0029] Figure 8 Cooperating structure diagram of the release coil, the ejector pin and the sliding ring in the present utility model;

[0030] Figure 9 Cooperating structure diagram of the swing seat and the locking seat in the upper cover in the present utility model;

[0031] Figure 10 Structure diagram of the base in the present utility model.

[0032] In the figure: 1. Upper cover; 11. Contact space; 12. Release operation port; 13. Limit plate; 14. Limit groove; 2. Base; 3. Swing seat; 31. Rotating shaft; 32. First spring; 4. Static contact piece; 41. Static contact point; 5. Moving contact piece; 51. Moving contact point; 6. Locking seat; 61. Limit step; 62. Locking spring; 71. Release coil; 711. Lower boss; 72. Ejector pin; 721. Block; 73. Sliding ring; 731. Arc-shaped pushing surface; 732. Connecting bayonet; 733. Upper limit block; 734. Front limit block; 74. Ejector pin spring; 8. Manual release button; 81. Release push rod; 811. Inclined guide surface; 82. Buckle; 9. Reset button; 91. Reset push rod. Specific embodiments

[0033] Next, in combination with the appended drawings in the embodiments of the present utility model Figures 1-10, the technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] Embodiment:

[0035] As Figures 1 to 10 shown, the present utility model discloses a manual tripping mechanism of a leakage protection device, which includes an upper cover 1 and a base 2 that are covered with each other. A swing seat 3 is movably arranged between the upper cover 1 and the base 2. The middle part of the swing seat 3 is movably fitted in the upper cover 1. Specifically: on both the left and right sides of the swing seat 3, rotating shafts 31 are integrally formed in the middle positions. Correspondingly, the upper cover 1 is integrally formed with a limiting plate 13 corresponding to the rotating shafts 31. A limiting groove 14 for the rotating shafts 31 to movably fit in is formed on the limiting plate 13, which is used to cooperate with the rotating shafts 31 so that the swing seat 3 can swing flexibly in the limiting groove 14. Moving contact pieces 5 are arranged on both the left and right sides of the swing seat 3. A moving contact point 51 is connected to the rear end of the moving contact piece 5. Correspondingly, static contact pieces 4 are arranged on the upper sides of the rear ends of the two moving contact pieces 5 on the upper cover 1. A static contact point 41 for contacting the moving contact point 51 is arranged on the static contact piece 4. When the swing seat 3 is in the closed position, the moving contact point 51 is in close contact with the static contact point 41 to form a circuit. In addition, a locking seat 6 is arranged on the front side of the swing seat 3. The upper end of the locking seat 6 is rotatably fitted on the upper cover 1 and the lower end passes through the base 2 downward. And a limiting step 61 for limiting the front side of the swing seat 3 is formed on the locking seat 6. When the front side of the swing seat 3 is located in the limiting step 61, the moving contact piece 5 and the static contact piece 4 maintain good contact and the circuit is turned on. A tripping coil 71 is fixedly arranged on the lower side of the base 2. A thimble 72 is movably fitted in the tripping coil 71. One end of the thimble 72 passes through the tripping coil 71 and is fixedly connected with a sliding ring 73. The sliding ring 73 faces the rear side of the lower end of the locking seat 6 correspondingly. A thimble spring 74 is arranged between the thimble 72 and the tripping coil 71. The thimble spring 74 is used to push the thimble 72 to move backward. In addition, a manual tripping button 8 for pushing the sliding ring 73 to move forward is arranged on the upper cover 1.

[0036] In this embodiment, a locking spring 62 is arranged between the front side of the locking seat 6 and the upper cover 1. The locking spring 62 is used to push the locking seat 6 to abut against the swing seat 3. The locking spring 62 pushes the locking seat 6 to stably lock the swing seat 3 on the limiting step 61 of the locking seat 6, ensuring the reliability of the locking structure and preventing unplanned tripping caused by vibration or malfunction. In addition, in the case of tripping, when the user presses down the swing seat 3, the locking spring 62 can push the locking seat 6 to automatically lock the swing seat 3 through the limiting step 61.

[0037] In this embodiment, a first spring 32 is provided between the base 2 and the swing seat 3 near its front side position. The first spring 32 is located on the front side of the rotating shaft 31 and is used to upwardly abut against the swing seat 3. When the front side of the swing seat 3 is located within the limiting step 61, the moving contact 51 abuts against the static contact 41 (because the front side of the swing seat 3 is pressed downward, then the rear side of the swing seat 3 will tilt upward, so that the moving contact 51 contacts the static contact 41). In addition, a reset button 9 is movably provided on the upper cover 1, and the reset button 9 includes a reset push rod 91 located on the upper side of the swing seat 3. When the utility model is in the tripped state, by pressing the reset button 9, the reset push rod 91 can push the front side of the swing seat 3 to move downward, and again make the front side of the swing seat 3 snap into the limiting step 61 of the latch seat 6, restoring the conduction state of the circuit.

[0038] It should also be noted that during specific implementation and use, a circuit board is provided below the tripping coil 71, and the tripping coil 71 is electrically connected to the circuit board. The circuit board integrates a control circuit and a detection module, and a current transformer is provided on the circuit board. The moving contact piece 5 passes through the current transformer and is connected to the power supply terminal, while the static contact piece 4 is connected to the load terminal. In this way, current enters from the power supply terminal, passes through the moving contact piece 5 through the current transformer, and then flows through the static contact piece 4 to the load terminal, forming a complete power supply loop. In the normal working state, the current transformer monitors in real time whether the current flowing through the moving contact piece 5 is unbalanced. When a leakage fault occurs (for example: human body electric shock or line insulation damage), the vector sum of the current between the live wire and the neutral wire is no longer zero. The current transformer senses the residual current and outputs a signal, which after being processed by the control circuit triggers an electric signal to the tripping coil 71. The tripping coil 71 is energized and operates, driving the thimble 72 to move forward, driving the sliding ring 73 to move forward synchronously, thereby pushing the latch seat 6 to move forward, causing the front side of the swing seat 3 to disengage from the limiting step 61. The front side of the swing seat 3 swings upward around the rotating shaft 31 under the action of the first spring 32. Therefore, the rear side of the swing seat 3 swings downward, driving the moving contact 51 to separate from the static contact 41, realizing automatic disconnection of the circuit. The above circuit board, current transformer, power supply terminal, and load terminal are all prior arts, and there are a large number of mature technologies to support the functions they need to achieve and the circuit connections. This application does not involve improvements in this area, so it will not be elaborated here.

[0039] The improvement of the present utility model mainly lies in the manual tripping mechanism, which is used for the user to quickly disconnect the circuit through manual operation in the event of the failure of the automatic tripping mechanism or in special circumstances. To adapt to the setting of the manual tripping button 8, the ejector pin 72 of the present utility model passes through the rear side of the tripping coil 71. The left and right sides of the sliding ring 73 are slidably fitted on the left and right sides of the tripping coil 71. The front side of the sliding ring 73 abuts against the lower end of the locking seat 6, and the rear side of the sliding ring 73 is used to cooperate with the manual tripping button 8. Among them, an arc-shaped pushing surface 731 is provided on the rear side of the sliding ring 73, and the manual tripping button 8 is movably fitted up and down on the upper cover 1. The manual tripping button 8 includes a tripping push rod 81 that extends downward and passes through the base 2. An inclined guide surface 811 for abutting against the arc-shaped pushing surface 731 is provided at the bottom of the tripping push rod 81. When the manual tripping button 8 is pressed, the tripping push rod 81 pushes the sliding ring 73 forward through the inclined guide surface 811, thereby driving the locking seat 6 to move forward. Therefore, the front side of the swing seat 3 is separated from the limiting step 61, and the moving contact 51 is separated from the static contact 41, completing the manual tripping operation.

[0040] The specific structure for connecting the ejector pin 72 and the sliding ring 73 is as follows: A connecting bayonet 732 is provided on the rear side of the sliding ring 73, and a clamping block 721 located in the bayonet is integrally connected to the rear end of the ejector pin 72. The clamping block 721 is embedded in the connecting bayonet 732 to ensure the stable connection between the ejector pin 72 and the sliding ring 73. In addition, an upper limiting block 733 for abutting against the upper side of the clamping block 721 is integrally formed on the upper side of the connecting bayonet 732 of the sliding ring 73. To further ensure the smooth operation of the tripping coil, the left and right sides of the tripping coil 71 include lower convex platforms 711 located below the sliding ring 73. The sliding ring 73 is slidably fitted on the upper side of the lower convex platforms 711. A front limiting block 734 for abutting against the front side of the tripping coil 71 is provided at the front side position of the sliding ring 73. The front limiting block 734 is used to limit the backward movement stroke of the sliding ring 73 pushed by the ejector pin spring 74.

[0041] In the present utility model, contact spaces 11 for accommodating the moving contacts 51 and the static contacts 41 on the left and right sides are provided at the left and right positions at the rear of the upper cover 1. An operation opening 12 for the tripping push rod 81 to pass through is also provided between the two contact spaces 11 at the rear of the upper cover 1. This design reasonably arranges the internal space, avoids interference between the manual tripping push rod 81 and other components, is convenient for installation and maintenance, and also ensures that the tripping push rod 81 can smoothly push the sliding ring 73 to perform the tripping operation, improving the compactness and practicality of the overall structure.

[0042] It should be noted that in specific implementation, the present utility model, circuit board, current transformer, power supply terminal, load terminal, etc. will all be installed in a leakage protector housing. Among them, the reset button 9 protrudes from the leakage protector housing, and the manual trip button 8 is arranged on the leakage protector housing in a vertically sliding fit. The upper end of the manual trip button 8 is located on the upper side of the leakage protector housing, and the buckle 82 on the manual trip button 8 is used to prevent the manual trip button 8 from disengaging from the leakage protector housing.

[0043] At the same time, it should be pointed out that the terms used in the present utility model, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model.

[0044] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A manual tripping mechanism for a leakage protection device, characterized in that: It includes an upper cover and a base that are covered with each other. A swing seat is movably arranged between the upper cover and the base. Moving contact pieces are provided on both the left and right sides of the swing seat. Static contact pieces are provided on the upper sides of the rear ends of the two moving contact pieces on the upper cover. A lock seat is provided on the front side of the swing seat. The upper end of the lock seat is rotatably fitted on the upper cover and the lower end passes through the base downward. A limiting step for limiting the front side of the swing seat is provided on the lock seat. When the front side of the swing seat is located within the limiting step, the moving contact piece is in contact with the static contact piece. A release coil is fixedly arranged on the lower side of the base. A thimble is movably fitted within the release coil. One end of the thimble passes through the release coil and is fixedly connected to a sliding ring. The sliding ring is correspondingly oriented towards the rear side of the lower end of the lock seat. A manual release button for pushing the sliding ring to move forward is provided on the upper cover.

2. The manual tripping mechanism of a leakage protection device according to claim 1, characterized in that: The thimble passes through towards the rear side of the release coil. Both the left and right sides of the sliding ring are slidably fitted on the left and right sides of the release coil. The front side of the sliding ring abuts against the lower end of the lock seat. The rear side of the sliding ring is used to cooperate with the manual release button.

3. The manual tripping mechanism of a leakage protection device according to claim 2, characterized in that: An arc-shaped pushing surface is provided on the rear side of the sliding ring. The manual release button is movably fitted up and down on the upper cover. The manual release button includes a release push rod that extends downward and passes through the base. An inclined guide surface for abutting against the arc-shaped pushing surface is provided at the bottom of the release push rod.

4. The manual tripping mechanism of a leakage protection device according to claim 2, characterized in that: A connection bayonet is provided on the rear side of the sliding ring. A block is integrally connected to the rear end of the thimble and is located within the bayonet. An upper limiting block for abutting against the upper side of the block is integrally formed on the upper side of the connection bayonet of the sliding ring. The left and right sides of the release coil include lower convex platforms located on the lower side of the sliding ring. The sliding ring is slidably fitted on the upper side of the lower convex platforms. A front limiting block for abutting against the front side of the release coil is provided at the front side position of the sliding ring. A thimble spring is provided within the thimble and the release coil. The thimble spring is used to push the thimble to move backward.

5. The manual tripping mechanism of a leakage protection device according to claim 1 or 2, characterized in that: A moving contact point is connected to the rear end of the moving contact piece. A static contact point for contacting the moving contact point is provided on the static contact piece. Contact spaces for accommodating the moving contact points and the static contact points on the left and right sides are respectively provided at the left and right sides of the rear part inside the upper cover. A release operation opening for allowing the release push rod to pass through is further provided between the two contact spaces at the rear part inside the upper cover.

6. The manual tripping mechanism of a leakage protection device according to claim 1, characterized in that: A lock spring is provided between the front side of the lock seat and the upper cover. The lock spring is used to push the lock seat to abut against the swing seat.

7. The manual tripping mechanism of a leakage protection device according to claim 1, characterized in that: The middle part of the swing seat is movably fitted within the upper cover. A first spring is provided between the base and the swing seat near its front side position. A reset button is movably arranged on the upper cover. The reset button includes a reset push rod located on the upper side of the swing seat.

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