CN219575530U - Circuit breaker and power distribution equipment - Google Patents

Abstract

The utility model provides a circuit breaker and power distribution equipment. The circuit breaker comprises a shell, a fixed contact, a moving contact, a handle and a lock catch; the shell is provided with an inner cavity and a first through hole, and the inner cavity is communicated with the first through hole; the fixed contact is arranged in the inner cavity; the movable contact is arranged in the inner cavity; the handle is movably arranged in the inner cavity and connected with the moving contact, and is used for enabling the moving contact to be in contact with or separated from the fixed contact, and the circuit breaker is in a closing state when the moving contact is in contact with the fixed contact. The lock catch comprises a first end and a second end which are oppositely arranged, the first end is closer to the first through hole than the second end, and the first end stretches into the first through hole; the lock catch is movably arranged in the inner cavity along the arrangement direction of the first end and the second end; when the circuit breaker is in a closing state, the second end of the lock catch is propped against the handle, so that the lock catch cannot move, and the circuit breaker in the closing state can be prevented from being inserted into the distribution box.

Description

Circuit breaker and power distribution equipment

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker and power distribution equipment.

Background

The circuit breaker has two states of closing and opening, when the circuit breaker is closed, a moving contact and a fixed contact in the circuit breaker are contacted, and when the circuit breaker is opened, the moving contact and the fixed contact in the circuit breaker are separated.

In traditional circuit breaker, when the circuit breaker is in the state of closing, the circuit breaker can be pegged graft to the block terminal by operating personnel, and the circuit breaker is pegged graft with the power and is in the state of closing, and the circuit breaker can be pulled out by operating personnel, puts operating personnel in danger ground so easily.

Disclosure of Invention

The utility model mainly aims to provide a circuit breaker and power distribution equipment, and the locking mechanism can prevent the circuit breaker in a closing state from being inserted into a power distribution box and also prevent the circuit breaker in the closing state from being pulled out, so that the safety of operators can be protected.

In a first aspect, an embodiment of the present utility model provides a circuit breaker, including a housing, a stationary contact, a moving contact, a handle, and a latch; the shell is provided with an inner cavity and a first through hole, and the inner cavity is communicated with the first through hole; the fixed contact is arranged in the inner cavity; the movable contact is arranged in the inner cavity; the handle is movably arranged in the inner cavity and connected with the movable contact, and is used for enabling the movable contact to be in contact with or separated from the fixed contact, and the circuit breaker is in a closing state when the movable contact is in contact with the fixed contact; the lock catch comprises a first end and a second end which are oppositely arranged, the first end is closer to the first through hole than the second end, and the first end stretches into the first through hole; the lock catch is movably arranged in the inner cavity along the arrangement direction of the first end and the second end; when the circuit breaker is in a closing state, the second end of the lock catch abuts against the handle.

When the circuit breaker is in a closing state, the lock catch is propped against by the handle, the lock catch cannot move, the circuit breaker in the closing state can be prevented from being inserted into the distribution box, the circuit breaker in the closing state, which is inserted into the distribution box, can be prevented from being pulled out, and the safety of operators can be protected.

With reference to the first aspect, in a possible implementation manner, a side surface of the handle facing the first through hole is provided with a notch, and the notch is used for the second end of the lock catch to extend in. The lock catch can extend into or out of the notch when moving in the inner cavity.

With reference to the first aspect, in one possible implementation manner, the circuit breaker is in a separated state when the moving contact is separated from the fixed contact, and the second end of the lock catch is aligned with the notch so as to be capable of extending into the notch. When the second end of the lock catch is aligned with the notch, the lock catch can move and can extend into or out of the notch. It can be understood that the breaker is in a breaking state, the lock catch can move, the breaker can be inserted into the distribution box, and the breaking state of the breaker can be directly pulled out of the distribution box.

With reference to the first aspect, in one possible implementation manner, a distance between the bottom surface of the notch and the inner wall of the housing where the first through hole is located is greater than a distance between the side surface of the handle facing the first through hole and the inner wall of the housing where the first through hole is located.

With reference to the first aspect, in one possible implementation manner, a dimension of the lock catch along an arrangement direction of the first end and the second end is greater than a distance from a side surface of the handle where the notch is located to an outer wall of the housing where the first through hole is located; the size of the lock catch along the arrangement direction of the first end and the second end is smaller than or equal to the distance between the bottom surface of the notch and the outer wall of the shell where the first through hole is located.

With reference to the first aspect, in one possible implementation manner, the circuit breaker further includes an elastic member disposed in the inner cavity, one end of the elastic member is fixedly connected with the housing, and the other end of the elastic member is fixedly connected with the lock catch. The elastic member can enable the lock catch to act in a force accumulating mode, for example, the elastic member can enable the second end of the lock catch to extend out of the notch by utilizing elastic potential energy of the elastic member.

With reference to the first aspect, in one possible implementation manner, when the second end of the lock catch protrudes into the notch, the elastic member has a restoring force that drives the second end of the lock catch to protrude out of the notch. The elastic piece can enable the second end of the lock catch to automatically extend out of the notch by utilizing restoring force.

With reference to the first aspect, in a possible implementation manner, the housing is provided with a guide for guiding the lock catch. The moving direction of the lock catch guide can be limited through the guide piece, and the stability of lock catch movement is improved.

With reference to the first aspect, in one possible implementation manner, the guide piece includes a first limiting protrusion and a second limiting protrusion, the first limiting protrusion and the second limiting protrusion are disposed at intervals, and the lock catch is disposed between the first limiting protrusion and the second limiting protrusion.

In combination with the first aspect, in one possible implementation manner, the first end is provided with an inclined plane, the first end gradually contracts towards a direction away from the handle, and the inclined plane can slide relatively with the distribution box, so that the lock catch is switched from the first posture to the second posture, for example, when the circuit breaker in the opening state needs to be plugged into the distribution box, the circuit breaker is pressed to enable the circuit breaker to extend into the fixing groove, the distribution box can slide relatively with the inclined plane of the first end and enable the second end of the lock catch to extend into the notch, and at this time, the circuit breaker can be plugged into the distribution box smoothly.

In a second aspect, the power distribution equipment comprises a power distribution box and any of the circuit breakers as described above, the power distribution box is provided with a fixed slot and a second through hole which are communicated, and the circuit breakers are inserted in the fixed slot; when the circuit breaker is in a closing state, the first end of the lock catch stretches into the second through hole. When the circuit breaker is in a closing state, the lock catch can prevent the circuit breaker in the closing state from being inserted into the distribution box, and can also prevent the circuit breaker in the closing state from being pulled out, so that the safety of operators can be protected.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a power distribution device according to an embodiment of the present utility model;

fig. 2 is a schematic perspective view of a circuit breaker according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of an internal structure of a circuit breaker according to an embodiment of the present utility model;

fig. 4 is a plan view showing an internal structure of another circuit breaker according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a handle according to an embodiment of the present utility model;

FIG. 6 is a schematic structural diagram of a latch according to an embodiment of the present utility model;

fig. 7 is a plan view illustrating an internal structure of a circuit breaker according to another embodiment of the present utility model;

fig. 8 is a plan view illustrating an internal structure of a circuit breaker according to another embodiment of the present utility model;

fig. 9 is a plan view illustrating an internal structure of a circuit breaker according to another embodiment of the present utility model.

Reference numerals illustrate:

1. a power distribution device; 10. a circuit breaker; 20. a distribution box; 21. a fixing groove; 211. a second through hole; 10a, locking mechanism; 10b, a contact mechanism; 10c, a static contact; 10d, a moving contact; 10e, input terminals; 10f, knitting wires; 11. a housing; 111. an inner cavity; 112. a first through hole; 113. the first limiting protrusion; 114. the second limiting bulge; 12. a handle; 121. a notch; 13. locking; 131. a first end; 131a, inclined plane; 132. a second end; 14. an elastic member.

Detailed Description

The circuit breaker can be applied to a power supply and distribution system for household electricity and is used for switching on, carrying and breaking current between a power supply network and a household circuit. The circuit breaker can also be applied to a power supply and distribution system of enterprise electric equipment or public electric equipment and is used for switching on, carrying and breaking the current between a power supply network and the enterprise electric equipment or the public electric equipment. Specifically, when the electric equipment (such as the 4G base station, the 5G base station and the like) needs to work normally, a user can switch the circuit breaker to be in a closed state, so that the power supply network can provide electric energy required by the normal work for the electric equipment. When the electric equipment needs to be overhauled and maintained, a user can switch the circuit breaker into an off state so as to conveniently overhaul, maintain and the like the electric equipment. In addition, during certain periods, the demand for certain powered devices (e.g., 4G base stations or 5G base stations in a remote area) may be low or not required, and the user may switch the circuit breaker to an open state to conserve power.

The circuit breaker has two states of closing and opening, when the circuit breaker is closed, a moving contact and a fixed contact in the circuit breaker are contacted, and when the circuit breaker is opened, the moving contact and the fixed contact in the circuit breaker are separated.

In the traditional circuit breaker, when the circuit breaker is in a closing state, the circuit breaker can be plugged into a power supply by an operator, the circuit breaker is plugged into the power supply and is in the closing state, and the circuit breaker can also be pulled out by the operator, so that the operator is easy to place in a dangerous place.

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail with reference to the accompanying drawings.

Referring to fig. 1, the present utility model discloses a power distribution apparatus 1, wherein the power distribution apparatus 1 includes a power distribution box 20 and at least one circuit breaker 10, the power distribution box 20 is provided with a fixing slot 21, and the circuit breaker 10 is inserted into the fixing slot 21. When the circuit breaker 10 is connected to a power source and in a closed state, the power distribution device 1 is used to supply power to a load, which is a power consumption device.

In the embodiment provided by the utility model, the two ends of the fixing groove 21 are opened, and the circuit breaker 10 can be inserted into the fixing groove 21, so that the circuit breaker 10 can be conveniently installed.

Referring to fig. 2 and 3, the circuit breaker 10 includes a locking mechanism 10a and a contact mechanism 10b, the contact mechanism 10b includes a fixed contact 10c and a movable contact 10d, the fixed contact 10c is fixed in an inner cavity 111 of the housing 11, and the movable contact 10d is connected with the locking mechanism 10 a. The connection of the moving contact 10d to the locking mechanism 10a means that the locking mechanism 10a is directly connected to the moving contact 10d or that the moving contact 10d is indirectly connected to the locking mechanism 10 a. When the moving contact 10d is indirectly connected with the locking mechanism 10a, the circuit breaker 10 is further provided with a transmission mechanism, and the transmission mechanism is simultaneously connected with the locking mechanism 10a and the moving contact 10 d. The locking mechanism 10a can drive the transmission mechanism to move, so that the moving contact 10d is separated from or contacted with the fixed contact 10 c. When the moving contact 10d contacts the fixed contact 10c, the circuit breaker 10 is in a closing state. When the movable contact 10d is separated from the stationary contact 10c, the circuit breaker 10 is in the open state.

In the embodiment provided by the utility model, the circuit breaker 10 further comprises an input terminal 10e, a braided wire 10f and a connecting terminal, wherein the input terminal 10e is connected with the fixed contact 10c, the movable contact 10d is connected with the braided wire 10f, and the braided wire 10f is connected with the connecting terminal. When the circuit breaker 10 is in the closed state, the input terminal 10e is electrically connected to the connection terminal. When the circuit breaker 10 is in the open state, the access terminal is electrically disconnected from the terminal. The input terminal 10e is for connection to a power source, which may be mains electricity, an electric storage device, or the like. The wiring terminal is used for being connected with a load.

Referring to fig. 4, the locking mechanism 10a includes a housing 11, a handle 12, and a shackle 13. The housing 11 is provided with an inner cavity 111 and a first through hole 112, and the inner cavity 111 and the first through hole 112 communicate with each other. The handle 12 is disposed in the inner cavity 111, and the handle 12 is movable along the X-axis direction to switch the on and off states of the circuit breaker 10. For example, if the handle 12 moves to drive the moving contact 10d to make the moving contact 10d contact with the fixed contact 10c, the circuit breaker 10 can be in a closing state, the lock catch 13 abuts against the handle 12, and the lock catch 13 can be disabled, at this time, the circuit breaker 10 cannot be plugged into the distribution box 20, or the circuit breaker 10 plugged into the distribution box 20 cannot be pulled out. If the handle 12 moves to drive the moving contact 10d to separate from the fixed contact 10c, the breaker 10 can be in a breaking state, at this time, the lock catch 13 can move, the breaker 10 can be plugged into the distribution box 20, or the breaker 10 plugged into the distribution box 20 can be pulled out.

In the embodiment provided by the utility model, the shell 11 is inserted into the fixing groove 21 of the distribution box 20, and the distribution box 20 is further provided with a second through hole 211, and the second through hole 211 is communicated with the fixing groove 21.

Referring to fig. 5, a notch 121 is disposed on a side of the handle 12 facing the first through hole 112, and a distance between a bottom surface of the notch 121 and an inner wall of the housing 11 where the first through hole 112 is located is greater than a distance between a side of the handle 12 facing the first through hole 112 and an inner wall of the housing 11 where the first through hole 112 is located. The side of the handle 12 facing the first through hole 112 may be a smooth plane.

Referring to fig. 6, the latch 13 is disposed in the inner cavity 111, and the latch 13 includes a first end 131 and a second end 132 disposed opposite to each other, where the first end 131 and the second end 132 are arranged along the Y-axis direction. The lock 13 is movable in the Y-axis direction in the inner chamber 111. Wherein, the first end 131 of the lock catch 13 extends into the first through hole 112, the first end 131 of the lock catch 13 can extend into or out of the second through hole 211 through the first through hole 112 when the lock catch 13 is active, and the second end 132 of the lock catch 13 can extend into or out of the notch 121. The dimension of the lock 13 along the arrangement direction of the first end 131 and the second end 132 is greater than the distance from the side surface of the handle 12 where the notch 121 is located to the inner wall of the distribution box 20 where the second through hole 211 is located, and the dimension of the lock 13 along the arrangement direction of the first end 131 and the second end 132 is less than or equal to the distance between the bottom surface of the notch 121 and the inner wall of the distribution box 20 where the second through hole 211 is located. When the second end 132 of the lock catch 13 extends out of the notch 121, the first end 131 of the lock catch 13 can penetrate through the first through hole 112 and extend out of the first through hole 112, and meanwhile, when the second end 132 of the lock catch 13 extends into the notch 121 and contacts with the bottom surface of the notch 121, the first end 131 of the lock catch 13 still extends into the second through hole 211 can be avoided. It will be appreciated that when the second end 132 of the latch 13 extends out of the notch 121, the first end 131 of the latch 13 may pass through the first through hole 112 and extend out of the first through hole 112. When the second end 132 of the latch 13 extends into the notch 121 and contacts the bottom surface of the notch 121, the first end 131 of the latch 13 can extend out of the second through hole 211.

In the embodiment provided by the utility model, the bottom surface of the notch 121 in the handle 12 is closer to the fixed contact 10c than the side of the handle 12 facing the first through hole 112, and when the movable contact 10d contacts the fixed contact 10c, the second end 132 of the lock catch 13 protrudes out of the notch 121 and faces the side of the handle 12 facing the first through hole 112.

The locking mechanism 10a can prevent the circuit breaker 10 in the closing state from being plugged into the distribution box 20 so that the lock catch 13 enters the second through hole 211, specifically, since the first end 131 of the lock catch 13 extends out of the notch 121 and faces the side face of the first through hole 112 relative to the handle 12, at this time, the first end 131 of the lock catch 13 penetrates through the first through hole 112 and extends out of the first through hole 112, and since the dimension of the lock catch 13 in the arrangement direction of the first end 131 and the second end 132 is greater than the distance from the side face of the handle 12 where the notch 121 is located to the inner wall of the distribution box 20 where the second through hole 211 is located, the inner wall of the distribution box 20 where the second through hole 211 is located and the side face of the handle 12 facing the first through hole 112 can prevent the lock catch 13 from moving along the Y axis direction, and the lock catch 13 in the circuit breaker 10 in the closing state can be prevented from entering the second through hole 211 by the distribution box 211.

The locking mechanism 10a can prevent the circuit breaker 10 inserted in the distribution box 20 and in the closed state from being pulled out, specifically, since the first end 131 of the lock catch 13 protrudes out of the notch 121 and faces the side face of the first through hole 112 relative to the handle 12, at this time, the first end 131 of the lock catch 13 penetrates through the first through hole 112 and protrudes out of the first through hole 112, and since the dimension of the lock catch 13 along the arrangement direction of the first end 131 and the second end 132 is greater than the distance from the side face of the handle 12 where the notch 121 is located to the inner wall of the distribution box 20 where the second through hole 211 is located, the inner wall of the distribution box 20 where the second through hole 211 is located and the side face of the handle 12 facing the first through hole 112 can prevent the lock catch 13 from moving along the Y axis direction, so that the first end 131 of the lock catch 13 cannot protrude out of the second through hole 211, and further the circuit breaker 10 inserted in the distribution box 20 in the closed state cannot be pulled out.

The circuit breaker 10 is plugged into the distribution box 20 so that the lock catch 13 enters the second through hole 211, and the circuit breaker 10 is electrically connected with an external power source or a power source of the distribution box 20 by being plugged into the distribution box 20.

In the embodiment provided by the utility model, the lock catch 13 has a first posture and a second posture, the lock catch 13 can move along the Y-axis direction, the lock catch 13 extends out of the notch 121 when in the first posture, and the lock catch 13 extends into the notch 121 when in the second posture. It should be noted that, when the circuit breaker 10 is in the open state, the second end 132 of the latch 13 can be aligned with the notch 121, and at this time, the first end 131 of the latch 13 can be extended into the notch 121. It will be appreciated that when the circuit breaker 10 needs to be plugged into the distribution box 20 to enable the latch 13 to enter the second through hole 211, the circuit breaker 10 may be in a separated state, the second end 132 of the latch 13 may extend into the notch 121, because the dimension of the latch 13 along the arrangement direction of the first end 131 and the second end 132 is less than or equal to the distance between the bottom surface of the notch 121 and the inner wall of the distribution box 20 where the second through hole 211 is located, the distribution box 20 cannot limit the latch 13 to move along the X-axis direction, and when the latch 13 moves along the X-axis direction along with the circuit breaker 10 and the first end 131 of the latch 13 aligns with the second through hole 211, the latch 13 moves along the Y-axis and extends into the second through hole 211, and at this time, the second end 132 of the latch 13 extends out of the notch 121. When the breaker 10 in the switch-off state is required to be plugged into the distribution box 20 to be pulled out, the breaker 10 can be in the switch-off state, and because the second end 132 of the lock catch 13 can be aligned with the notch 121, the lock catch 13 is moved along the Y-axis direction, so that the second end 132 of the lock catch 13 can extend into the notch 121, the first end 131 of the lock catch 13 extends out of the second through hole 211, the second through hole 211 does not limit the displacement of the lock catch 13 along the X-axis direction any more, and the breaker 10 in the switch-off state plugged into the distribution box 20 can be pulled out.

In the embodiment provided by the utility model, the locking mechanism 10a can prevent the circuit breaker 10 in the closing state from being plugged into the distribution box 20, and can also prevent the circuit breaker in the closing state from being directly pulled out of the distribution box 20, so that the safety of operators is protected.

In the embodiment provided by the utility model, the locking mechanism 10a is provided with an elastic member 14, the elastic member 14 can be a spring or a torsion spring, one end of the elastic member 14 is fixedly connected with the inner cavity 111 of the housing 11, and the other end of the elastic member 14 is fixedly connected with the lock catch 13. When the lock catch 13 extends into the notch 121, the elastic member 14 is in a force storage state, and the elastic member 14 has a restoring force for driving the lock catch 13 to extend out of the notch 121.

In the embodiment provided by the utility model, the handle 12 has a step surface, and the step surface is arranged between the notch 121 and the side surface of the handle 12 facing the first through hole. The stepped surface can limit sliding of the second end 132 of the catch 13 to the side of the handle 12 facing the first through hole 112 when the second end 132 of the catch 13 extends into the notch 121.

In the embodiment provided by the utility model, the shell 11 is provided with a guiding piece for guiding the lock catch 13, the guiding piece protrudes out of the inner wall of the shell 11, the guiding piece comprises a first limiting protrusion 113 and a second limiting protrusion 114, the first limiting protrusion 113 and the second limiting protrusion 114 are arranged at intervals, and the lock catch 13 is arranged between the first limiting protrusion 113 and the second limiting protrusion 114.

In the embodiment provided by the utility model, the first end 131 of the lock catch 13 is provided with a slope 131a, and the first end 131 gradually contracts in a direction away from the handle 12. Specifically, when the circuit breaker 10 is in the open state, if the circuit breaker 10 needs to be plugged into the distribution box 20, the circuit breaker 10 is pressed against the fixing groove 21 in the distribution box 20, the circuit breaker 10 is moved along the X-axis direction, when the first end 131 of the lock catch 13 in the circuit breaker 10 contacts with the distribution box 20, the distribution box 20 can slide relatively with the first end 131 of the lock catch 13, so that the lock catch 13 moves and the second end 132 of the lock catch 13 extends into the notch 121, and when the first end 131 of the lock catch 13 faces the second through hole 211 of the distribution box 20, the second end 132 of the lock catch 13 extends out of the notch 121 and the first end 131 of the lock catch 13 extends into the second through hole 211 due to the action of the elastic member 14.

In the embodiment provided by the utility model, as shown in fig. 4, 7 and 8, before the circuit breaker 10 is inserted into the distribution box 20 in fig. 4, the circuit breaker 10 is in a separated state, the lock catch 13 in the circuit breaker 10 is located outside the distribution box 20, and the circuit breaker 10 can move along the X-axis direction to enable the lock catch 13 to slide between the distribution boxes 20. In fig. 5, the circuit breaker 10 is inserted between the distribution boxes 20, the circuit breaker 10 is in a separated state, the lock catch 13 in the circuit breaker 10 slides into the distribution boxes 20, the first end 131 of the lock catch 13 in the circuit breaker 10 abuts against the inner wall of the distribution boxes 20, and the second end 132 of the lock catch 13 extends into the notch 121. In fig. 6, the circuit breaker 10 is in the open state, the first end 131 of the latch 13 in the circuit breaker 10 slides into the second through hole 211 of the distribution box 20, and the second end 132 of the latch 13 protrudes out of the notch 121.

In the embodiment provided by the utility model, referring to fig. 9, in the process of pulling out the circuit breaker 10 inserted into the distribution box 20, the lock catch 13 is moved along the Y-axis direction, so that the first end 131 of the lock catch 13 extends out of the second through hole 211, and the second end 132 of the lock catch 13 extends into the notch 121, so that the circuit breaker 10 can move along the X-axis direction, and at this time, the circuit breaker 10 is in the open state, and the circuit breaker 10 can be pulled out of the distribution box 20.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

The foregoing description is only illustrative of some embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the present specification and drawings or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims (11)

1. A circuit breaker, comprising:

the shell is provided with an inner cavity and a first through hole, and the inner cavity is communicated with the first through hole;

the fixed contact is arranged in the inner cavity;

the movable contact is arranged in the inner cavity;

the handle is movably arranged in the inner cavity and connected with the movable contact, and is used for enabling the movable contact to be in contact with or separated from the fixed contact, and the circuit breaker is in a closing state when the movable contact is in contact with the fixed contact;

the lock catch comprises a first end and a second end which are oppositely arranged, the first end is closer to the first through hole than the second end, and the first end stretches into the first through hole; the lock catch is movably arranged in the inner cavity along the arrangement direction of the first end and the second end; when the circuit breaker is in a closing state, the second end of the lock catch abuts against the handle.

2. The circuit breaker of claim 1, wherein a side of the handle facing the first through hole is provided with a notch for the second end of the latch to extend in.

3. The circuit breaker of claim 2, wherein the circuit breaker is in a tripped state when the movable contact is separated from the stationary contact, and wherein the second end of the latch is aligned with the notch to extend into the notch.

4. The circuit breaker of claim 3, wherein a distance between a bottom surface of the notch and an inner wall of the housing in which the first through hole is located is greater than a distance between a side surface of the handle facing the first through hole and the inner wall of the housing in which the first through hole is located.

5. The circuit breaker of claim 4, wherein the dimension of the latch in the direction of arrangement of the first end and the second end is greater than the distance from the side of the handle where the notch is located to the outer wall of the housing where the first through hole is located; the size of the lock catch along the arrangement direction of the first end and the second end is smaller than or equal to the distance between the bottom surface of the notch and the outer wall of the shell where the first through hole is located.

6. The circuit breaker of claim 2, further comprising an elastic member disposed in the inner cavity, wherein one end of the elastic member is fixedly connected to the housing, and the other end of the elastic member is fixedly connected to the latch.

7. The circuit breaker of claim 6, wherein the resilient member has a restoring force urging the second end of the latch out of the notch when the second end of the latch is extended into the notch.

8. The circuit breaker according to any of claims 1-7, wherein the housing is provided with a guide for guiding the latch.

9. The circuit breaker of claim 8, wherein the guide comprises a first spacing protrusion and a second spacing protrusion, the first spacing protrusion and the second spacing protrusion being spaced apart, the catch being disposed between the first spacing protrusion and the second spacing protrusion.

10. The circuit breaker of any of claims 1-7, wherein the first end is provided with a bevel, the first end tapering away from the handle.

11. A power distribution device, characterized in that the power distribution device comprises a power distribution box and a breaker according to any one of claims 1-10, the power distribution box is provided with a fixed slot and a second through hole which are communicated, and the breaker is inserted in the fixed slot;

when the circuit breaker is in a closing state, the first end of the lock catch stretches into the second through hole.