Leakage protection switch with overload protection

Abstract

The utility model adopts a leakage protection switch with overload protection, which comprises a shell, a wire inlet end, a wire outlet end, a handle, a reset assembly, a control panel, a leakage mutual inductor and an overload driving piece, the reset assembly comprises a reset support, and the reset support comprises a leakage opening pushing part and an overload opening driving part. A control panel limiting area and a driving piece limiting area are formed in the shell, the overload driving piece comprises a fixing part and an overload driving part, and the overload driving piece is a bimetallic strip, so that when the leakage protection switch is in use, if the installed leakage protection switch is not matched with an electric appliance, the overload driving part is not matched with the electric appliance; in other words, the amperage output by the electric appliance is larger than the amperage of the rated current of the earth leakage protection switch, when the current of the earth leakage protection switch passes through the overload driving piece, the overload driving part can move towards one side of the overload opening driving part of the reset support through the overload resetting characteristic of the overload driving piece, the driving handle jumps, and the overload opening driving part is reset. Therefore, the leakage protection switch executes overload tripping protection in the switch overload stage.

Description

Technical Field

[0001] The utility model relates to a leakage protection switch with overload protection. Background Art

[0002] A leakage protection switch is a protective device installed in a circuit, which can cut off the circuit in time when an electrical appliance has a leakage, to prevent the current from passing through the human body and causing an electric shock. The common installation of leakage protection switches on the market is generally used on electrical appliances such as air conditioners, power tools, electric water heaters, and kitchen appliances. Compared with the use of leakage circuit breakers (leakage circuit breakers are generally suitable for the overall control of circuits), it is an independently controlled leakage protection switch, that is, it provides one-to-one protection for the electrical appliances involved, that is, it only cuts off the power to the electrical appliances involved in the protection, and does not cause the problem of all electrical appliances being cut off when the electrical appliances involved have a leakage, such as when a leakage circuit breaker is installed. This causes inconvenience in use.

[0003] At the same time, common leakage protection switches generally only have leakage protection functions, that is, after the leakage protection switch is installed, it will not perform detection such as whether the electrical appliance is overloaded (that is, whether the current of the electrical appliance exceeds the rated current of the leakage protection switch). If an unmatched leakage protection switch is used, the sockets of the electrical appliances may be frequently burned out, or an overload short circuit may occur, causing the leakage protection switch or the electrical appliance to catch fire. Summary of the invention

[0004] In view of the above-mentioned deficiencies, the utility model provides a leakage protection switch with overload protection and an overload detection function.

[0005] In order to achieve the above purpose, the utility model adopts a leakage protection switch with overload protection, including a housing, an inlet terminal and an outlet terminal arranged in the housing, a handle for executing the opening and closing of the switch, a reset component for driving the handle to jump due to leakage, a control board for sensing the state of the switch circuit, and a leakage transformer electrically connected to the control board and used to sense whether the external circuit has leakage;

[0006] The inlet and outlet terminals are respectively located on the two side ends of the housing, the control board and the leakage current transformer are distributed in the direction of the outlet terminal, the reset assembly includes a reset bracket, the reset bracket includes a leakage current tripping pusher formed toward one side of the actuator, a control board limiting area for setting the control board and a drive member limiting area are formed in the housing relative to the handle and the outlet terminal, and the reset bracket also includes an overload tripping drive distributed on the upper side of the drive member limiting area;

[0007] The switch also includes an overload driving member, which includes a fixing portion for limiting the overload driving member in a driving member limiting area, and an overload driving member extending to one side of the overload tripping driving member. In the overload stage of the switch, the overload driving member bends toward the side of the overload tripping driving member, contacts and pushes the overload driving member to move away from the overload driving member, and executes the overload tripping of the switch; the overload driving member is a bimetallic strip.

[0008] The beneficial effect of the above structure is that: by involving the leakage protection switch in the overload drive part, and involving the reset bracket that can be linked with the handle in the overload trip drive part, a drive part limiting area is synchronously formed in the area between the handle and the outlet terminal, and the overload drive part is limited in the drive part limiting area. At the same time, the overload drive part is designed, and the overload drive part extends to one side of the overload trip drive part, so that when the leakage protection switch is in use, if the installed electrical appliance does not match the electrical appliance, that is, the ampere output by the electrical appliance is greater than the ampere of the rated current of the leakage protection switch, the leakage protection switch will be energized after the current passes through the load drive part. Through the overload reset characteristic of the overload drive part, the overload drive part will move toward the side of the overload trip drive part of the reset bracket, and then the drive handle will jump, thereby realizing the leakage protection switch to perform overload tripping protection for the switch overload stage.

[0009] The utility model is further configured as follows: the switch also includes an outgoing wire distributed in the direction of the incoming end, and a spring mechanism, the outgoing wire includes a spring side connecting wire and an outgoing side connecting wire, one end of the spring mechanism faces the incoming end, and executes the on and off of the switch circuit by contacting or moving away from the incoming end, the other end of the spring mechanism is distributed on one side of the overload driving member, the overload driving part of the overload driving member and the other end of the spring mechanism are connected through the spring side connecting wire, one end of the outgoing side connecting wire is connected to the fixed part of the overload driving member, and the other end passes through the leakage transformer and is connected to the outgoing end; the switch also includes an actuator for executing the leakage opening of the switch, the actuator is distributed in the direction of the incoming end, and is located on one side of the reset bracket and is linked with the reset bracket. In the leakage stage of the switch, the leakage opening pushing part of the reset bracket on the reset assembly is pushed by the actuator, and the adjustment of the driving handle is formed.

[0010] Through the above, the leakage protection switch is involved in the overload driving component, and at the same time, in order to ensure its reliable placement in the switch and not affect the formation of the complete circuit, when the outgoing line conductor is involved in the spring-type side connecting line and the outgoing line side connecting line, that is, the spring-type side connecting line is connected between one end of the spring-type mechanism and the overload driving part of the overload driving component, and the outgoing line side connecting line is connected between the fixed part of the overload driving component and the outgoing line end, and the outgoing line side connecting line passes through the leakage transformer before passing through and connecting with the outgoing line end, thereby making the switch involve the overload driving component and reliably placed in the leakage protection switch, while not affecting the leakage function of the switch, thereby ensuring the reliability of the design of the leakage protection switch.

[0011] The utility model is further configured such that the control panel limiting area and the driving member limiting area are distributed side by side.

[0012] Through the above arrangement, since the original switch is designed to ensure the reliable leakage function, that is, after the outgoing wire is led out, it first passes through the leakage transformer and then is connected to the outgoing terminal. That is, the switch with the original structure is quite compact inside, so if one front and one back or other arrangements are adopted, it will affect the size of the shell or the installation. The utility model arranges the control panel limit area and the drive component limit area in a side-by-side manner, that is, the designer only needs to simply miniaturize the control panel and simultaneously reduce the original control panel limit area. That is, after the drive component limit area is designed in a side-by-side position, it can be achieved that the overload drive component of the leakage protection switch is reliably installed, and it can also be closer to the spring mechanism, so that the subsequent wiring is more convenient, thereby ensuring the convenience of the design of the leakage protection switch involved in the utility model.

[0013] The utility model is further configured as follows: the incoming line end includes a neutral line incoming line side and a live line incoming line side, the shrapnel mechanism includes a live line side shrapnel mechanism and a neutral line side shrapnel mechanism, and the live line side shrapnel mechanism is distributed between the live line incoming line side and the driving component limiting area; the incoming line end includes a neutral line incoming line side and a live line incoming line side, the shrapnel mechanism includes a live line side shrapnel mechanism and a neutral line side shrapnel mechanism, and the neutral line side shrapnel mechanism is distributed between the neutral line incoming line side and the driving component limiting area.

[0014] Through the above arrangement, the overload drive component used in the leakage protection switch is not limited to the installation at the live wire or neutral wire position, thereby making the installation of the overload drive component more convenient.

[0015] The utility model is further configured such that the incoming line end includes an electrical connecting piece, one end of which is provided with a terminal and connected, and the other end is adapted to a spring mechanism and performs on-off coordination, limiting grooves are respectively provided on both sides of the electrical connecting piece, and a terminal limiting cavity and an electrical connecting piece limiting cavity for inserting and limiting the terminal and the electrical connecting piece are formed on the incoming line end, limiting protrusions are formed in the electrical connecting piece limiting cavity relative to the positions of the two side edges of the electrical connecting piece, and the installation limit of the electrical connecting piece at the position of the incoming line end is formed by the cooperation of the limiting protrusions and the limiting grooves; a guide portion is formed on the limiting protrusion relative to the insertion direction of the electrical connecting piece in the electrical connecting piece limiting cavity.

[0016] Through the above-mentioned arrangement, the electrical connecting piece involved in the incoming line end can be installed by means of placement and limiting. Compared with the traditional installation of the electrical connecting piece, the electrical connecting piece is placed in the corresponding position and then fixed to the shell by screws, which can greatly improve the convenience of installation.

[0017] The utility model is further configured that the overload driving member also includes a vertical extension portion distributed at 90 degrees to the fixed portion, an oblique extension portion distributed on the overload driving portion and extending obliquely toward the vertical extension portion, the vertical extension portion is distributed on an edge of the fixed portion away from the outlet end, the overload driving portion and the vertical extension portion are staggered and connected through the oblique extension portion;

[0018] During the overload stage of the switch, the overload driving part is driven to move toward the side of the load-tripping driving part through the over-strong electrical bending resetting action of the obliquely extending part, and the overload driving part is pushed to move away from the overload driving part, thereby constituting the overload tripping of the switch.

[0019] Through the above, the overload drive component can be installed reliably in the leakage protection switch, and the tripping process of the switch during the overload process can be reliably driven, thereby further ensuring the reliability of the design of the leakage protection switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of a leakage protection switch according to a specific embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of a leakage protection switch in a specific embodiment of the utility model, in which the overload drive component is installed on the neutral line side;

[0022] Figure 3 yes Figure 2 An enlarged schematic diagram of

[0023] Figure 4It is a three-dimensional schematic diagram of the internal structure of the housing of the leakage protection switch of the specific embodiment of the utility model;

[0024] Figure 5 yes Figure 4 An enlarged schematic diagram of

[0025] Figure 6 It is a three-dimensional schematic diagram of an overload drive member of a specific embodiment of the utility model;

[0026] Figure 7 It is a schematic diagram of the coordination between the electrical connection piece and the terminal post in a specific embodiment of the utility model;

[0027] Figure 8 It is a three-dimensional schematic diagram of a reduction bracket according to a specific embodiment of the utility model;

[0028] Fig. 9 The utility model is a schematic diagram of the internal structure of a leakage protection switch in which the overload drive component is installed on the live wire side. DETAILED DESCRIPTION

[0029] like Figure 1-9 As shown, the specific embodiment of the utility model is a leakage protection switch with overload protection, including a housing 2, an inlet terminal a arranged in the housing 2, an outlet terminal 6, a reset component for executing switch opening and closing and for driving the handle 1 to jump due to leakage, an overload driving member 7, a control board 5 for sensing the state of the switch circuit, and a leakage transformer 51 electrically connected to the control board 5 and used to sense whether the external circuit has leakage;

[0030] The incoming terminal a and the outgoing terminal 6 are respectively located on the two side ends of the shell 2, the control board 5 and the leakage transformer 51 are distributed in the direction of the outgoing terminal 6, the reset component includes a reset bracket 4, the reset bracket 4 includes a leakage trip push part 42 formed toward the side of the actuator, and an overload trip drive part 41 distributed on the upper side of the drive member limiting area 21. A control board limiting area 22 for setting the control board 5 and a drive member limiting area 21 are formed in the shell 2 relative to the handle 1 and the outgoing terminal 6; the overload drive 7 includes a fixing part 74 for limiting the overload drive 7 in the drive member limiting area 21, and an overload drive 71 extending to one side of the overload trip drive 41. In the overload stage of the switch, the overload drive 71 bends toward one side of the overload trip drive, and contacts and pushes the overload drive 7 to move away from the overload drive 71, and executes the overload trip of the switch; the overload drive 7 is a bimetallic strip.

[0031] By involving the leakage protection switch in the overload drive 7, and involving the reset bracket 4 which can be linked with the handle 1 in the overload trip drive part 41, a drive member limiting area 21 is synchronously formed in the area between the handle 1 and the outlet terminal 6, and the overload drive member 7 is limited in the drive member limiting area 21. At the same time, the overload drive member 7 is designed, and the overload drive part 71 extends to one side of the overload trip drive part 41, so that when the leakage protection switch is in use, if the installed electrical appliance does not match the electrical appliance, that is, the ampere output by the electrical appliance is greater than the ampere of the rated current of the leakage protection switch, the leakage protection switch will be energized after the current passes through the load drive member 7. Through the overload resetting characteristics of the overload drive member 7, the overload drive part 71 will move toward the side of the overload trip drive part 41 of the reset bracket 4, and then the driving handle 1 will jump, so that the leakage protection switch performs overload tripping protection for the switch overload stage.

[0032] like Figure 1-2 As shown, the above-mentioned switch also includes an outgoing wire 8 distributed in the direction of the incoming end, and a spring mechanism 3, the outgoing wire 8 includes a spring side connecting wire 82 and an outgoing side connecting wire 81, one end of the spring mechanism 3 faces the incoming terminal a, and the switch circuit is turned on and off by contacting or moving away from the incoming terminal a, the other end of the spring mechanism 3 is distributed on one side of the overload driving member 7, the overload driving part 71 of the overload driving member 7 is connected to the other end of the spring mechanism 3 through the spring side connecting wire 82, one end of the outgoing side connecting wire 81 is connected to the fixed part 74 of the overload driving member 7, and the other end passes through the leakage transformer 51 and is connected to the outgoing terminal 6; the switch also includes an actuator for executing the switch leakage opening, the actuator is distributed in the direction of the incoming terminal a, and is located on one side of the reset bracket 4 and is linked with the reset bracket 4. In the leakage stage of the switch, the leakage opening push part 42 of the reset bracket 4 on the reset assembly is pushed by the actuator, and the adjustment of the driving handle 1 is formed.

[0033] like Figure 2-5 As shown in Figure 9, the control panel limit area 22 and the drive component limit area 21 are distributed side by side; the incoming line terminal a includes a neutral line incoming line side and a live line incoming line side, and the spring clip mechanism 3 includes a live line side spring clip mechanism and a neutral line side spring clip mechanism, wherein the drive component limit area 21 is located at the leakage protection switch distribution position, and can include two types, one: the live line side spring clip mechanism is distributed between the live line incoming line side and the drive component limit area 21; the second, the neutral line side spring clip mechanism is distributed between the neutral line incoming line side and the drive component limit area 21.

[0034] like Figure 4 , 5As shown in Figures 7 and 8, the above-mentioned incoming line terminal a includes an electrical connecting piece 9, one end of which is provided with a terminal 10 and connected, and the other end is adapted to the spring mechanism 3 and performs power on and off coordination. Limiting grooves 91 are respectively provided on both sides of the electrical connecting piece 9, and a terminal limiting cavity 23 and an electrical connecting piece limiting cavity 24 for inserting and limiting the terminal 10 and the electrical connecting piece 9 are formed on the incoming line terminal a. A limiting protrusion is formed in the electrical connecting piece limiting cavity 24 relative to the two side edge positions of the electrical connecting piece 9, and the installation limit of the electrical connecting piece 9 at the position of the incoming line terminal a is formed by the cooperation between the limiting protrusion and the limiting groove 91; a guide portion is formed on the limiting protrusion relative to the insertion direction of the electrical connecting piece 9 in the electrical connecting piece limiting cavity 24.

[0035] like Figure 2 , 3 As shown in , 6 and 9, the overload driving member 7 further includes a vertical extension portion 73 which is distributed at 90 degrees with the fixing portion 74, and an oblique extension portion 72 which is distributed on the overload driving portion 71 and extends obliquely toward the vertical extension portion 73. The vertical extension portion 73 is distributed on one side edge of the fixing portion 74 away from the outlet terminal 6. The overload driving portion 71 and the vertical extension portion 73 are staggered and connected via the oblique extension portion 72.

[0036] During the overload stage of the switch, the overload driving part 71 is driven to move toward the side of the overload tripping driving part through the over-strong electrical bending resetting action of the oblique extension part 72, and the overload driving part 7 is pushed to move away from the overload driving part 71, thereby constituting the overload tripping of the switch.

Claims

1. A leakage protection switch with overload protection, comprising a housing, an inlet terminal and an outlet terminal arranged in the housing, a handle for executing the opening and closing of the switch, a reset component for driving the handle to jump due to leakage, a control board for sensing the state of the switch circuit, and a leakage transformer electrically connected to the control board and used to sense whether the external circuit has leakage; The inlet and outlet terminals are respectively located on both side ends of the housing, the control board and the leakage transformer are distributed in the direction of the outlet terminals, the reset assembly includes a reset bracket, and the reset bracket includes a leakage breaking pusher formed toward one side of the actuator, characterized in that: A control panel limit area and a drive member limit area for setting the control panel are formed in the housing relative to the handle and the outlet terminal, and the reset bracket also includes an overload tripping drive part distributed on the upper side of the drive member limit area; The switch also includes an overload driving member, which includes a fixing portion for limiting the overload driving member in a driving member limiting area, and an overload driving member extending to one side of the overload tripping driving member. In the overload stage of the switch, the overload driving member bends toward the side of the overload tripping driving member, contacts and pushes the overload driving member to move away from the overload driving member, and executes the overload tripping of the switch.

2. The leakage protection switch with overload protection according to claim 1, characterized in that: The switch also includes an outgoing wire distributed in the direction of the incoming end, and a spring mechanism, the outgoing wire includes a spring-piece side connecting wire and an outgoing side connecting wire, one end of the spring mechanism faces the incoming end, and the switch circuit is turned on and off by contacting or moving away from the incoming end, the other end of the spring mechanism is distributed on one side of the overload driving component, the overload driving part of the overload driving component and the other end of the spring mechanism are connected through the spring-piece side connecting wire, one end of the outgoing side connecting wire is connected to the fixed part of the overload driving component, and the other end passes through the leakage transformer and is connected to the outgoing end.

3. The leakage protection switch with overload protection according to claim 2 is characterized in that: The control panel limiting area and the driving component limiting area are distributed side by side.

4. The leakage protection switch with overload protection according to claim 3 is characterized in that: The incoming line end includes a neutral line incoming line side and a live line incoming line side, the spring clip mechanism includes a live line side spring clip mechanism and a neutral line side spring clip mechanism, and the live line side spring clip mechanism is distributed between the live line incoming line side and the driving component limiting area.

5. The leakage protection switch with overload protection according to claim 3 is characterized in that: The incoming line end includes a neutral line incoming line side and a live line incoming line side, the spring clip mechanism includes a live line side spring clip mechanism and a neutral line side spring clip mechanism, and the neutral line side spring clip mechanism is distributed between the neutral line incoming line side and the driving component limiting area.

6. The leakage protection switch with overload protection according to claim 1, 2, 3, 4 or 5, characterized in that: The incoming line end includes an electrical connecting piece, one end of which is provided with a terminal and connected, and the other end is adapted to the spring mechanism and performs power on and off coordination. Limiting grooves are respectively provided on both sides of the electrical connecting piece. The incoming line end is formed with a terminal limiting cavity and an electrical connecting piece limiting cavity for inserting and limiting the terminal and the electrical connecting piece. A limiting protrusion is formed in the electrical connecting piece limiting cavity relative to the two side edges of the electrical connecting piece. Through the cooperation of the limiting protrusion and the limiting groove, the installation limit of the electrical connecting piece at the incoming line end position is formed.

7. The leakage protection switch with overload protection according to claim 2, 3, 4 or 5, characterized in that: The overload driving member further comprises a vertical extension portion which is distributed at 90 degrees with the fixed portion, and an oblique extension portion which is distributed on the overload driving portion and extends obliquely toward the vertical extension portion, wherein the vertical extension portion is distributed on an edge of the fixed portion away from the outlet end, and the overload driving portion and the vertical extension portion are staggered and connected via the oblique extension portion; During the overload stage of the switch, the overload driving part is driven to move toward the side of the load-tripping driving part through the over-strong electrical bending resetting action of the obliquely extending part, and the overload driving part is pushed to move away from the overload driving part, thereby constituting the overload tripping of the switch.

8. The leakage protection switch with overload protection according to claim 6, characterized in that: A guiding portion is formed on the limiting protrusion relative to the insertion direction of the electrical connecting piece into the limiting cavity of the electrical connecting piece.

9. The leakage protection switch with overload protection according to claim 1, 2, 3, 4 or 5, characterized in that: The switch also includes an actuator for executing the switch leakage tripping. The actuator is distributed in the direction of the incoming line end, is located on one side of the reset bracket and is linked with the reset bracket. In the switch leakage stage, the actuator pushes the leakage tripping pushing part of the reset bracket on the reset assembly, and forms an adjustment that drives the handle.

10. The leakage protection switch with overload protection according to claim 1, 2, 3, 4, 5 or 8, characterized in that: The overload driving member is a bimetallic strip.

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