CN215869267U - Low-voltage electrical protector - Google Patents

Abstract

The utility model discloses a low-voltage electrical protector, which comprises a hollow shell, wherein the shell is provided with an opening communicated with an inner cavity of the shell, the opening is provided with an operating handle in an overturning manner, the operating handle is provided with a slot for inserting a fuse, two opposite sides of the shell are respectively provided with a first switch-on position and a second switch-on position, the first switch-on position is connected with a coil, one end of the coil, which is far away from the first switch-on position, is connected with the fuse, the coil is wound with a core column, the inner wall of the inner cavity of the shell is provided with a metal block, the metal block is just opposite to one end of the core column, an energy storage expansion piece is arranged between the core column and the metal block, and the other end of the core column is abutted against the operating handle; the opening inner wall is provided with the connecting piece of being connected with second switch-on position, and when closed operating handle, the fuse can be dismantled with the connecting piece and be connected, and fuse and second switch-on position switch-on. By adopting the arrangement, the beneficial effect of directly observing whether the circuit is in a normal state is achieved.

Description

Low-voltage electrical protector

Technical Field

The utility model relates to the technical field of electrical protectors, in particular to a low-voltage electrical protector.

Background

The protector is a device for providing power utilization safety protection for the electric appliance, an intelligent high-voltage prevention device is arranged in the protector, and the internal protection device can be intelligently started under the abnormal condition that the electric appliance is subjected to instantaneous high voltage, so that the power utilization safety of the rear-end electric appliance is ensured. Protectors can be virtually divided into two broad categories: the first is a household protector; and the other is mechanical protector, and corresponding protectors are selected according to different requirements. The protector has the advantages that the fuse which has an effective function is also called a fuse, mainly plays a role in overload protection and short-circuit protection, and can be fused and cut off current when the current abnormally rises to a certain height and heat, so that the effect of protecting the safe operation of a circuit is achieved.

Current protector, including the casing, the casing is provided with flip outward, is provided with in the flip and supplies fuse male slot, and the metal cap that slot inner wall corresponds the fuse both ends is provided with the trigger shell fragment, and two trigger shell fragments are connected with same pilot lamp, and the display end protrusion flip of pilot lamp sets up towards the surface of outside, and the socket has all been seted up to the both sides of casing, and the embedded switch-on piece that is equipped with of socket, switch-on piece are used for being connected the switch-on with the both ends of electronic box. When the flip cover is closed, the conductive caps at the two ends of the fuse are just connected with the two conduction blocks in the shell, so that the whole protector is in a working state. When the fuse normally works, the display lamp is turned on to be green, and when the fuse is fused, the display lamp is turned on to be red, so that the power supply safety of the electrical appliance is prompted to be failed.

However, in a place where electrical appliances are used more densely, the number of used electrical protectors is relatively large, and in order to prevent the situation that the flip cover of the protector is pressed by mistake, the protector is usually installed at a relatively high position, so that a good display lamp of the protector at ordinary times is not emitted in the process of checking and maintaining by an inspector, and therefore, when the surface of the protector which is relatively high and far is observed from a low position, the situation that the observation is judged by mistake or cannot be observed clearly is easily caused, and the situation that the inspection is wrong or the inspection is omitted is caused. However, in the prior art, a structure capable of clearly displaying the action state of the protector, namely closing (normal) or separating (accident), does not exist.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a low-voltage electrical protector which has the beneficial effect of facilitating the observation and judgment of the fusing condition of a fuse in the protector from the outside so as to improve the maintenance accuracy.

The purpose of the utility model is realized by the following technical scheme:

a low-voltage electrical protector comprises a hollow shell, wherein the shell is provided with an opening communicated with an inner cavity of the shell, the opening is provided with an operating handle in an overturning manner, the operating handle is provided with a slot for inserting a fuse, two opposite sides of the shell are respectively provided with a first connection position and a second connection position, the first connection position is connected with a coil, one end, away from the first connection position, of the coil is connected with the fuse, a core column is wound on the coil, the inner wall of the inner cavity of the shell is provided with a metal block, the metal block is opposite to one end of the core column, an energy storage expansion piece is arranged between the core column and the metal block, and the other end of the core column is abutted to the operating handle; the opening inner wall be provided with the connecting piece that the second switch-on position is connected, when the closure during operating handle, the fuse can be dismantled with the connecting piece and be connected, just the fuse passes through the connecting piece with the switch-on of second switch-on position.

Furthermore, a metal elastic sheet is arranged on the inner wall of the slot and connected with the coil, an included angle is formed between the metal elastic sheet and the inner wall of the slot, and the included angle between the metal elastic sheet and the inner wall of the slot is arranged towards the inner bottom surface of the slot; when the fuse is inserted into the slot, the conductive cap of the fuse is tightly propped against the metal elastic sheet.

Furthermore, the tail end, far away from the elastic end, of the metal elastic sheet is integrally connected with a conducting sheet, the conducting sheet is embedded into the inner wall of the slot, the tail end, far away from the metal elastic sheet, of the conducting sheet protrudes out of the operating handle and forms a conducting ring through bending, and the conducting ring is connected with the coil through a wire.

Further, the operating handle is L-shaped, the corner position of the operating handle is hinged to the inner wall of the opening, the slot is formed in one end face of the operating handle in the corner direction, the other end face of the operating handle in the corner direction is located in the inner cavity of the shell, the core column and the connecting piece are located on two sides of the operating handle respectively, and one end, far away from the energy storage telescopic piece, of the core column is abutted to the tail end, far away from the slot opening, of the operating handle in the corner direction.

The connecting piece comprises a conduction elastic piece connected with the inner wall of the opening, the conduction elastic piece and the inner wall of the opening are arranged at an included angle, the included angle between the conduction elastic piece and the inner wall of the opening faces towards the inner cavity of the shell, the tail end, far away from the elastic moving end, of the conduction elastic piece is integrally connected with a connection piece, the connection piece is embedded into the inner wall of the opening, and the tail end, far away from the conduction elastic piece, of the connection piece is connected with the second connection position.

Furthermore, a butting groove is formed in the edge of the opening close to the inner wall of the connecting piece, a butting block is fixedly connected to the end face of the operating handle close to the notch of the slot, and a limiting groove is formed in the inner wall of the opening close to the hinge point of the operating handle; when the operating handle is closed, the outer corner of the operating handle is abutted to the inner wall of the limiting groove, and the abutting block is abutted to the inner wall of the abutting groove.

Further, a handle block is fixedly connected to the end face, far away from the operating handle, of the abutting block, and anti-skid rubber is fixedly connected to the outer peripheral face of the handle block.

Further, the energy storage telescopic piece comprises a spring, one end of the spring is connected with the metal block, and the other end of the spring is connected with the core body column.

Furthermore, the end face, facing the spring, of the core body column is provided with a jack, the spring is sleeved with an insert rod, one end of the insert rod is inserted into the jack, and the other end of the insert rod is fixedly connected with the metal block.

Furthermore, the outer peripheral surfaces of the two ends of the inserted rod in the rod length direction are respectively provided with a protruding limiting ring, and the coil is positioned between the two limiting rings of the inserted rod.

The utility model has the following beneficial effects:

1. the utility model provides a low pressure electrical protector, is through setting up the slot at operating handle to insert the fuse in to the slot, thereby realize being connected dismantled between fuse and the operating handle, and then reach the effect of being convenient for change the dismouting. Through connecting the coil at first switch-on position, when inserting the slot to the fuse, can make the electrically conductive cap of fuse one end link to each other with the coil simultaneously. Through connecting the connecting piece at the second switch-on position, so when closing operating handle, can realize making the electrically conductive cap of fuse other end pass through the connecting piece and link to each other with the second switch-on position, can realize fuse and connecting piece can dismantle simultaneously and be connected, thereby make operating handle be in the relatively fixed state, thereby keep operating handle to be in the closed state, the both ends of fuse are passed through the coil and the connecting piece at both ends and are connected with first switch-on position and second switch-on position respectively this moment, and then make the fuse link to each other with the positive negative pole of circuit or the live wire zero line of family's circuit, thereby make the fuse be in normal operating condition.

2. Through setting up the slot at operating handle to insert the fuse in to the slot, thereby realize being connected dismantled between fuse and the operating handle, and then reach the effect of being convenient for change the dismouting. Through connecting the coil at first switch-on position, when inserting the slot to the fuse, can make the electrically conductive cap of fuse one end link to each other with the coil simultaneously. Through connecting the connecting piece at second switch-on position, so when closing operating handle, can realize making the electrically conductive cap of fuse other end pass through the connecting piece and link to each other with second switch-on position, can realize fuse and connecting piece can dismantle simultaneously and be connected, thereby make operating handle be in the relatively fixed state, thereby keep operating handle to be in the closed state, the both ends of fuse are connected with first switch-on position and second switch-on position respectively through the coil and the connecting piece at both ends this moment, and then make the fuse link to each other with the positive negative pole of circuit or the live wire zero line of family's circuit, thereby make the fuse be in normal operating condition, reach the beneficial effect of directly observing whether the circuit is in normal condition from this.

Drawings

Fig. 1 is a schematic diagram of the open state of the protector.

Fig. 2 is a schematic diagram of the closing state of the protector.

Fig. 3 is a schematic structural diagram of a closing state of the protector.

Fig. 4 is a schematic structural diagram of another view angle of the closing state of the protector.

Fig. 5 is a schematic structural diagram of the protector in the open state.

FIG. 6 is a schematic diagram showing the state of the fuse taken out after the protector is opened.

Fig. 7 is a sectional view showing a closed state of the protector.

Fig. 8 is a sectional view showing the opening state of the protector.

Fig. 9 is an electrical schematic diagram of the fuse in use.

In the figure: 1. a housing; 11. an opening; 12. a first on position; 13. a second on position; 14. a butt joint groove; 15. a limiting groove; 16. conducting the elastic sheet; 17. clamping; 2. an operating handle; 21. a slot; 22. a butting block; 221. a handle block; 222. anti-skid rubber; 23. a metal spring sheet; 24. a conducting ring; 3. a metal block; 31. Inserting a rod; 32. a spring; 4. a core column; 41. a limiting ring; 42. a jack; 43. a coil; 5. and a fuse.

Detailed Description

The utility model is described in further detail below with reference to the figures and the specific embodiments. In the present specification, the terms "upper", "inner", "middle", "left", "right" and "one" are used for clarity of description only, and are not used to limit the scope of the present invention, and the relative relationship between the terms and the modifications may be regarded as the scope of the present invention without substantial technical changes.

Referring to fig. 1 to 9, a low-voltage electrical protector, including the casing 1 that is the cavity setting, casing 1 is the setting of class cuboid form, an opening 11 that is linked together with its inner chamber is seted up to one end face of casing 1, opening 11 is the rectangle form, the length direction of opening 11 is unanimous with the length direction of casing 1, opening 11 upset is provided with operating handle 2, operating handle 2 is used for opening and close opening 11, be used for opening or closing the protector simultaneously, operating handle 2 has seted up and has supplied fuse 5 male slot 21, casing 1 relative both sides are provided with first switch-on position 12 and second switch-on position 13 respectively. When the protector is integrally installed in a corresponding electric box or an electric switch, the first switch-on position 12 and the second switch-on position 13 are respectively connected with the positive electrode and the negative electrode of a power supply of a circuit or the live wire and the zero wire of a household circuit, so that the effect of electrifying two ends of a fuse 5 (fuse) in the protector is realized, and the subsequent protection of the circuit and an electric appliance is facilitated. The first switch-on position 12 is connected with a coil 43, one end of the coil 43, which is far away from the first switch-on position 12, is connected with a fuse 5 inserted in the slot 21, the coil 43 is wound with a core column 4, the core column 4 is made of a metal material, the inner wall of the inner cavity of the shell 1 is provided with a metal block 3, the metal block 3 is opposite to one end, which is far away from the operating handle 2, of the core column 4, an energy storage telescopic part is arranged between the core column 4 and the metal block 3, and the other end of the core column 4 is abutted to the operating handle 2; the opening 11 inner wall is provided with the connecting piece of being connected with second switch-on position 13, and when closing operating handle 2, fuse 5 can be dismantled with the connecting piece and be connected, and fuse 5 passes through the connecting piece and the switch-on of second switch-on position 13.

Specifically, through setting up slot 21 at operating handle 2 to insert fuse 5 in to slot 21, thereby realize being connected dismantled between fuse 5 and the operating handle 2, and then reach the effect of being convenient for change the dismouting. By connecting the coil 43 at the first on position 12, the conductive cap at one end of the fuse 5 can be connected to the coil 43 at the same time when the fuse 5 is inserted into the slot 21. Through connecting the connecting piece at second switch-on position 13, so when closing operating handle 2, can realize making the electrically conductive cap of fuse 5 other end pass through the connecting piece and link to each other with second switch-on position 13, can realize fuse 5 and connecting piece can dismantle simultaneously and be connected, thereby make operating handle 2 be in the relatively fixed state, thereby keep operating handle 2 to be in the closed state, the both ends of fuse 5 are connected with first switch-on position 12 and second switch-on position 13 respectively through coil 43 and the connecting piece at both ends this moment, and then make fuse 5 link to each other with the positive negative pole of circuit or the live wire zero line of family's circuit, thereby make fuse 5 be in normal operating condition.

In addition, the metal block 3 is arranged in the inner cavity of the shell 1, and the coil 43 is wound to connect the core column 4, so that when the whole protector is in a working state, the core column 4 and the wound coil 43 can be regarded as an inductance structure, according to the electromagnetic principle, after the operation handle 2 is closed, the coil 43 is electrified, so that two ends of the core column 4 are provided with magnetism, one end of the core column 4 is opposite to the metal block 3, and therefore, the core column 4 can compress the energy storage telescopic piece and is close to the metal block 3 to keep the closed state of the operation handle 2. In addition, when the fuse 5 is fused due to a circuit fault, the coil 43 in the protector is electrified and stopped, and at the moment, the two ends of the core column 4 lose magnetism, so that the compressed energy storage telescopic part resets, and the core column 4 is pushed to move towards the operating handle 2, so that the core column 4 pushes the operating handle 2 to release the detachable connection state of the operating handle 2 and the connecting piece, so that the operating handle 2 is in a turned-open state, and meanwhile, the fuse 5 of the protector is fused and damaged by a maintainer is indicated, compared with the prior art that the display lamp is observed in a front view mode, the on-off condition of the operating handle 2 of the protector in a working state is directly observed from the outside, the fuse 5 is represented to normally work when the fuse 5 is closed, and the fuse 5 is represented to be fused and damaged when the fuse 5 in the protector is turned-open, therefore, the technical scheme of the utility model can realize that the fuse 5 in the protector can be observed and judged from the outside conveniently, thereby achieving the beneficial effect of improving the maintenance accuracy.

Referring to fig. 1 to 9, operating handle 2 is L-shaped, the corner of operating handle 2 is hinged to the inner wall of opening 11 along one end in the length direction through a hinge shaft, slot 21 is provided in one end surface of operating handle 2 along the corner direction, the other end surface of operating handle 2 along the corner direction is located in the inner cavity of casing 1, core column 4 and connecting piece are located on two sides of operating handle 2 respectively, and one end of core column 4 far away from the energy storage telescopic piece is abutted to the end of operating handle 2 far away from the slot 21 notch along the corner direction. Specifically, because operating handle 2 is the L type, and the butt position is located operating handle 2 along the both ends of turning direction respectively between slot 21 position and core post 4 and the operating handle 2. Therefore, when the operating handle 2 is closed, the tail end of the operating handle 2 far away from the notch of the slot 21 can be driven to be close to the core column 4, and the fuse 5 in the slot 21 can be connected with the connecting piece, so that the effect of synchronous motion is achieved.

To achieve the function of the fuse being well fitted in the insertion groove 21. The inner wall of the slot 21 is provided with a metal elastic sheet 23, the metal elastic sheet 23 is connected with one end of the coil 43 far away from the first switch-on position 12, an included angle is formed between the metal elastic sheet 23 and the inner wall of the slot 21, and the included angle between the metal elastic sheet 23 and the inner wall of the slot 21 is arranged towards the inner bottom surface of the slot 21; when the fuse 5 is inserted into the slot 21, the conductive cap of the fuse 5 close to the inner bottom surface of the slot 21 and the metal elastic sheet 23 are mutually abutted. Specifically, through set up metal shrapnel 23 in slot 21, because metal shrapnel 23 has elasticity, and contained angle between metal shrapnel 23 and the slot 21 inner wall is towards the bottom surface in the slot 21, consequently when inserting fuse 5 in the slot 21, can utilize metal shrapnel 23 to support the electrically conductive cap of tight fuse 5 to reduce fuse 5 and fall out from the slot 21 in, and make coil 43 pass through the effect that metal shrapnel 23 and fuse 5 link to each other.

In order to achieve the function of connecting the metal dome 23 to the fuse 5. The end of the metal elastic sheet 23, which is far away from the elastic end, is integrally connected with a conducting sheet (not shown in the figure), the conducting sheet is embedded into the inner wall of the slot 21, the end of the conducting sheet, which is far away from the metal elastic sheet 23, protrudes out of the operating handle 2 and is far away from the inner corner side of the operating handle, the end of the conducting sheet, which protrudes out of the operating handle 2, is bent to form a conducting ring 24, and the conducting ring 24 is connected with the coil 43 through a wire. It is specific, through set up the conduction piece at metal shrapnel 23 to terminal bending type outside the piece protrusion operating handle 2 that switches on forms switch-on ring 24, so that bind with switch-on ring 24 through the wire and be connected, thereby realize the effect that the wire can be dismantled with switch-on ring 24 and be connected, thereby realize being convenient for artifical or intelligent equipment in the installation and utilize the effect that the wire will switch on ring 24 and coil 43 and link to each other, thereby reach the simple and easy beneficial effect of operation.

As shown in fig. 1 to 9, the operating handle 2 can be detachably connected to the connecting element when closed, and can be connected to the second switch-on position 13 via the connecting element. The connecting piece includes the shell fragment 16 that switches on with opening 11 inner wall connection, switches on that shell fragment 16 is the contained angle setting with opening 11 inner wall, switches on the contained angle between shell fragment 16 and the opening 11 inner wall and sets up towards casing 1 intracavity, switches on the terminal an organic whole that shell fragment 16 kept away from its bullet end and is connected with the switch-on piece (not shown in the figure), switch-on piece embedding opening 11 inner wall setting, and the switch-on piece is kept away from the terminal that switches on the shell fragment and is connected with second switch-on position 13. It is specific, switch on shell fragment 16 through the setting, owing to switch on shell fragment 16 and be made by metal material, and switch on contained angle between shell fragment 16 and the 11 inner walls of opening and set up towards 1 intracavity in the casing, consequently when closed operating handle 2, operating handle 2 and fuse 5 are first with switch on the hookup location contact between shell fragment 16 and the 11 inner walls of opening, so can reduce operating handle 2 and switch on the condition that the product installation is interfered between shell fragment 16, can utilize the elastic action who switches on shell fragment 16 simultaneously, thereby make the fuse 5 who switches on in shell fragment 16 and the slot 21 keep away from the electrically conductive cap of metal shell fragment 23 one end and support tightly, thereby keep operating handle 2 in relatively fixed state, and realize the effect that fuse 5 links to each other with second switch-on position 13.

In order to realize that the fuse 5 in the slot 21 can be just opposite to the conducting elastic sheet 16 when the operating handle 2 is in a closed state, so that the installation and positioning functions are realized. An abutting groove 14 is formed in the edge of the opening 11 close to the inner wall of the connecting piece, an abutting block 22 is fixedly connected to the end face of the operating handle 2 close to the notch of the slot 21, and a limiting groove 15 is formed in the inner wall of the opening 11 close to the hinge point of the operating handle 2; when the operating handle 2 is closed, the outer corner of the operating handle 2 is abutted against the inner wall of the limiting groove 15, the abutting block 22 is abutted against the inner wall of the abutting groove 14, and the fuse 5 in the slot 21 is abutted against the conducting elastic sheet 16, so that the effect of turning and positioning the operating handle 2 is achieved, and the operation of turning the operating handle 2 to the fuse 5 and conducting the elastic sheet 16 to abut against each other is simple.

In order to turn over or open the operating handle 2 from the outside, a handle block 221 is fixedly connected to the end surface of the abutting block 22 away from the operating handle, and an anti-slip rubber 222 is fixedly connected to the outer peripheral surface of the handle block 221. Specifically, the handle block 221 and the anti-slip rubber 222 are provided, so that the handle block 221 can be grasped conveniently, and the operation of turning the operation handle 2 is facilitated.

Referring to fig. 1 to 9, in order to realize the energy storage and telescopic resetting functions of the energy storage telescopic piece. The energy storage telescopic part comprises a spring 32, one end of the spring 32 is fixedly connected with the metal block 3, and the other end of the spring 32 is fixedly connected with the core column 4. Specifically, because the spring 32 has an elastic resetting function, when the protector is in a working state and the operating handle 2 is turned over and closed, the coil 43 is energized with current, so that the coil 43 and the core column 4 are integrally magnetized, and the core column 4 is close to the metal block 3 after compressing the spring 32, so that the closed state of the operating handle 2 is maintained. And when fuse 5 fusing damages, coil 43 can stop letting in electric current to make the magnetism of core post 4 disappear, spring 32 resets this moment, and promotes core post 4 and move towards operating handle 2, and core post 4 can promote operating handle 2, thereby makes operating handle 2 relieve and switch on the state of shell fragment 16 mutual butt, thereby makes operating handle 2 turn out outside opening 11.

In order to improve the guidance of the movement of the core column 4 towards or away from the operating handle 2, the end surface of the core column 4 facing the spring 32 is provided with an insertion hole 42, the spring 32 is sleeved with an insertion rod 31, one end of the insertion rod 31 is inserted into the insertion hole 42, and the other end of the insertion rod 31 is fixedly connected with the metal block 3. Specifically, by arranging the insertion rod 31 on the metal block 3, the core column 4 is inserted into the insertion rod 31 through the insertion hole 42, so that the insertion rod 31 and the insertion hole 42 can improve the movement guidance of the core column 4 when the core column 4 presses the spring 32, or when the spring 32 is reset to push the core column 4 to move towards the operating handle 2.

In order to reduce the possibility that the coil 43 falls out of the core rod 4, the outer peripheral surfaces of both ends of the plunger 31 in the rod length direction are each protruded with a stopper ring 41, and the coil 43 is located between the two stopper rings 41 of the plunger 31. One end of the spring 32, which is far away from the metal block 3, is fixedly connected with one limiting ring 41 of the core column 4.

The embodiments of the present invention are not limited thereto, and according to the above-mentioned contents of the present invention, the present invention can be modified, substituted or combined in other various forms without departing from the basic technical idea of the present invention.

Claims (8)

1. A low-voltage electrical protector, characterized by: the fuse protector comprises a hollow shell, wherein the shell is provided with an opening communicated with an inner cavity of the shell, the opening is provided with an operating handle in an overturning manner, the operating handle is provided with a slot for inserting a fuse, two opposite sides of the shell are respectively provided with a first connection position and a second connection position, the first connection position is connected with a coil, one end of the coil, far away from the first connection position, is connected with the fuse, the coil is wound with a core column, the inner wall of the inner cavity of the shell is provided with a metal block, the metal block is opposite to one end of the core column, an energy storage expansion piece is arranged between the core column and the metal block, and the other end of the core column is abutted against the operating handle; the opening inner wall be provided with the connecting piece that the second switch-on position is connected, when the closure during operating handle, the fuse can be dismantled with the connecting piece and be connected, just the fuse passes through the connecting piece with the switch-on of second switch-on position.

2. A low-voltage electrical protector as claimed in claim 1 wherein: the inner wall of the slot is provided with a metal elastic sheet, the metal elastic sheet is connected with the coil, an included angle is formed between the metal elastic sheet and the inner wall of the slot, and the included angle between the metal elastic sheet and the inner wall of the slot is arranged towards the inner bottom surface of the slot; when the fuse is inserted into the slot, the conductive cap of the fuse is tightly propped against the metal elastic sheet.

3. A low-voltage electrical protector as claimed in claim 2 wherein: the tail end, far away from the elastic end, of the metal elastic piece is integrally connected with a conducting piece, the conducting piece is embedded into the inner wall of the slot, the tail end, far away from the metal elastic piece, of the conducting piece protrudes out of the operating handle and forms a conducting ring through bending, and the conducting ring is connected with the coil through a wire.

4. A low-voltage electrical protector as claimed in claim 1 wherein: operating handle is the setting of L type, operating handle's turning position with the opening inner wall is articulated, the slot is seted up in operating handle is along one of them terminal surface of turning direction, operating handle is located along another terminal surface of turning direction the inner chamber of casing, the core post with the connecting piece is located respectively operating handle's both sides, the core post is kept away from the one end of energy storage extensible member with operating handle is kept away from along the turning direction the terminal butt of slot notch.

5. A low-voltage electrical protector as claimed in claim 4, wherein: the connecting piece include with opening inner wall connection switch on the shell fragment, switch on the shell fragment with opening inner wall is the contained angle setting, switch on the shell fragment with contained angle orientation between the opening inner wall set up in the casing inner chamber, switch on the shell fragment and keep away from its bullet end terminal body coupling have the switching-on piece, the embedding of switching-on piece the opening inner wall sets up, the switching-on piece is kept away from the terminal of switching on the shell fragment with second switching-on position is connected.

6. A low-voltage electrical protector as claimed in claim 4, wherein: the edge of the opening is provided with a butting groove on the inner wall close to the connecting piece, the end face of the operating handle close to the notch of the slot is fixedly connected with a butting block, and the inner wall of the opening close to the hinge joint of the operating handle is provided with a limiting groove; when the operating handle is closed, the outer corner of the operating handle is abutted to the inner wall of the limiting groove, and the abutting block is abutted to the inner wall of the abutting groove.

7. A low-voltage electrical protector as claimed in claim 6, wherein: the end face, far away from the operating handle, of the abutting block is fixedly connected with a handle block, and the outer peripheral face of the handle block is fixedly connected with anti-skidding rubber.

8. A low-voltage electrical protector as claimed in claim 1 wherein: the energy storage expansion piece comprises a spring, one end of the spring is connected with the metal block, and the other end of the spring is connected with the core body column.

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