JP2011222208A - Circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit breaker which is easily installed in a place with a small installation space and can effectively prevent malfunctions.SOLUTION: A circuit breaker comprises: an insulating housing 2; a fixed contactor 6 provided in the housing 2 and having a fixed contact 60; a movable contactor 7 having a movable contact 70 which moves toward or away from the fixed contact 60; and an operating handle 3 which has a handle part 4 exposed to outside of the housing 2 and causes the movable contact 70 to move toward or away from the fixed contact 60 when it is rotated with respect to the housing 2. The handle part 4 can change its shape into the first position in which it projects in front of the housing 2 and the second position in which it extends along the front surface of the housing 2.

Description

  The present invention relates to a circuit breaker capable of preventing malfunction.

A general circuit breaker (also referred to as a “breaker” or the like) includes an operation handle that is operated when connecting and disconnecting a circuit of an electronic device or the like.
The operation handle is normally provided on the front side of the circuit breaker, and is formed to be rotatable in the vertical direction with respect to the casing of the circuit breaker, for example. The circuit breaker is configured to connect the circuit by lifting the handle at the tip of the operation handle upward, and to interrupt the circuit by pushing down the handle of the operation handle downward. In addition, when an overcurrent flows due to an overload, short circuit, electric leakage, etc., the operation handle automatically moves to a predetermined position (for example, an intermediate position in the vertical direction) to shut off the circuit (both with the trip function). Configured).

  As described above, the conventional circuit breaker has a simple structure that can be connected to or disconnected from a circuit such as an electronic device simply by operating the operation handle provided on the front side of the circuit breaker in the vertical direction, for example. have. Therefore, when a person or an object touches the operation handle unintentionally, the circuit breaker may be operated (circuit connection or disconnection), that is, a malfunction may be caused.

  On the other hand, a technique for preventing malfunction of the circuit breaker is disclosed by attaching a plastic cover or the like covering the operation handle to the circuit breaker and restricting the movement of the operation handle (for example, Patent Document 1). reference).

JP-A-6-113424

  However, since the circuit breaker disclosed in Patent Document 1 is provided with a plastic cover covering the operation handle on the front side of the circuit breaker, a portion protruding to the front side of the circuit breaker becomes large. Therefore, there is a problem that it is difficult to install the circuit breaker in a place where the installation space is narrow. Further, when the movement of the operation handle itself is restricted, there is a problem that the trip function may not function effectively.

  An object of the present invention is to provide a circuit breaker that can be easily installed in a small installation space or the like and can effectively prevent malfunction.

  The present invention provides an insulating casing, a fixed contact provided inside the casing and having a fixed contact, a movable contact having a movable contact approaching or separating from the fixed contact, and the casing An operating handle that has a handle portion exposed to the outside of the body, and moves the movable contact toward or away from the fixed contact by rotating with respect to the housing, and the handle portion includes: The present invention relates to a circuit breaker configured to be deformable into a first state extending toward the front side of the housing and a second state extending along the front surface of the housing.

  The operation handle includes an arm portion connected to the handle portion. The handle portion is configured to be rotatable with respect to the arm portion. In the first state, the handle portion extends. It is preferable that the direction and the direction in which the arm portion extends coincide with each other, and the second state is formed by the direction in which the handle portion extends and the direction in which the arm portion extends do not coincide with each other.

  The handle portion includes a leaf spring member extending along a direction in which the handle portion extends, and a button member that presses and deforms the leaf spring member, and the arm portion is in the first state. A first recess facing the one end of the leaf spring member; and a second recess facing the one end of the leaf spring member in the second state, wherein the one end of the leaf spring member is The leaf spring member engages with the first recess in the first state, engages with the second recess in the second state, and operates the button member to press and deform the leaf spring member. It is preferable that the engagement between one end of the first portion and the first concave portion or the second concave portion is released so that the first state and the second state can be switched.

  Moreover, it is preferable that the said handle part does not protrude from the front surface of the said housing | casing in the said 2nd state.

  Moreover, it is preferable that the said handle part extends along the up-down direction of the said housing | casing in the said 2nd state.

  According to the present invention, it is possible to provide a circuit breaker that can be easily installed in a small installation space or the like and can effectively prevent malfunction.

It is a perspective view which shows the circuit breaker of embodiment of this invention. It is sectional drawing which shows typically the state which connected the circuit using the circuit breaker of this embodiment. It is sectional drawing which shows typically the state which interrupted | blocked the circuit using the circuit breaker of this embodiment. It is sectional drawing which shows typically the state which the circuit breaker of this embodiment tripped. It is sectional drawing which shows typically the internal structure of the operation handle in a 1st state. It is sectional drawing which shows typically the state which pushed the button member in the 1st state. It is sectional drawing which shows typically the state which deformed the handle part from the 1st state to the 2nd state in the state which pushed the button member. It is sectional drawing which shows typically the internal structure of the operation handle in a 2nd state.

Hereinafter, a breaker 1 as an embodiment of a circuit breaker of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a breaker 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing a state in which a circuit is connected using the breaker 1 of the present embodiment. FIG. 3 is a cross-sectional view schematically showing a state in which the circuit is interrupted using the breaker 1 of the present embodiment. FIG. 4 is a cross-sectional view schematically showing a state in which the circuit breaker of the present embodiment has tripped.

  In the following description, when viewed from the user standing on the front side of the breaker 1, the left-right direction is the direction of the arrow Y (Y1 is the left direction, Y2 is the right direction), and the front-rear (depth) direction is the direction of the arrow X (X1 The forward direction, X2 is the backward direction), and the vertical direction is the direction of the arrow Z (Z1 is the upward direction, Z2 is the downward direction).

  As shown in FIGS. 1 to 4, the breaker 1 includes a housing 2, a fixed contact 6 provided inside the housing 2, a movable contact 7 provided inside the housing 2, and a housing 2. And an operation handle 3 that rotates with respect to.

  The housing 2 is composed of a base and a cover that are molded from an insulating material, for example, a synthetic resin material such as PE or PET. In the present embodiment, a case in which a base and a cover are integrated is schematically shown as the housing 2.

As shown in FIG. 1, the housing 2 includes a main body portion 23 and a front protruding portion 20. Inside the main body 23, the entire fixed contact 6, the entire movable contact 7, and the fulcrum side of the operation handle 3 are arranged.
The front protrusion 20 includes a window hole 21. The window hole 21 is provided to project a handle portion 4 (described later) of the operation handle 3 in the front direction X1 in the front-rear direction X and to move the operation handle 3 in the up-down direction Z.

  As shown in FIGS. 2 to 4, the stationary contact 6 is disposed at a position near the rear direction X <b> 2 in the front-rear direction X inside the main body 23 of the housing 2. One end (upper end) side of the stationary contact 6 is connected to a power supply side terminal (not shown). The fixed contact 6 has a fixed contact 60 on the other end (lower end) side.

  As shown in FIGS. 2 to 4, the movable contact 7 is arranged in a position closer to the front direction X <b> 1 than the fixed contact 6 inside the main body 23 of the housing 2. The movable contact 7 is formed from a highly conductive material, for example, a copper material. The movable contact 7 has a movable contact 70 on one end (upper end) side thereof. The other end (lower end) side of the movable contact 7 is fixedly held by the cross bar 71.

  The cross bar 71 is supported by the housing 2 so as to be swingable in the front-rear direction X about the support shaft 72 at the lower end in the vertical direction Z. The movable contact 70 is configured to approach or separate from the fixed contact 60 when the cross bar 71 is swung in the front-rear direction X about the support shaft 72.

  As shown in FIGS. 2 to 4, the operation handle 3 includes a handle portion 4 and an arm portion 5 connected to the handle portion 4. The handle portion 4 is exposed outside the front of the housing 2 through the window hole 21 of the front protrusion 20 of the housing 2. The handle part 4 is formed from an insulating material, for example, a synthetic resin material.

  The arm portion 5 includes a distal end side portion 51 connected to the handle portion 4 and a handle arm portion 52 that is integrally fixed to the proximal end of the distal end side portion 51. The handle arm portion 52 rotates in the vertical direction Z with a pin (not shown) as a fulcrum inside the housing 2.

  The operation handle 3 operates the handle portion 4 to rotate the pin (not shown) as a fulcrum with respect to the front protruding portion 20 of the housing 2, thereby moving the movable contact 70 of the movable contact 7 to the fixed contact. It is configured to be movable in the vertical direction Z so as to approach or separate from the six fixed contacts 60.

Inside the main body portion 23 of the housing 2, an opening / closing mechanism portion 100 including a toggle link mechanism, an overcurrent tripping device (not shown), and the like are provided between the handle arm portion 52 of the operation handle 3 and the crossbar 71. Are disposed.
The opening / closing mechanism unit 100 includes a first link 101, a second link 102, and a link connecting pin 103. The link connecting pin 103 is connected to the handle arm portion 52 of the operation handle 3 via a spring 104.

  The first link 101 of the opening / closing mechanism 100 is connected to the crossbar 71 via a pin 105 at one end (rear end). The second link 102 is connected at one end (front end) to a trip lever 107 (described later) via a pin 106.

  The trip lever 107 is provided inside the main body 23 of the housing 2 so as to be rotatable about the pin 108 as a fulcrum. The trip lever 107 is connected to one end of the second link 102 of the opening / closing mechanism 100 through a pin 106 at an intermediate portion thereof. The trip lever 107 has a locking claw 109 at its lower end. The locking claw 109 is configured to be disengageable from the latch 110 of an overcurrent tripping device (not shown).

  The overcurrent tripping device operates to release the engagement of the latching claw 109 of the tripping lever 107 from the latch 110 when an overcurrent exceeding a predetermined value flows through the breaker 1. Since the configuration of the overcurrent tripping device is well known, the description of the specific configuration is omitted.

Next, the operation of the breaker 1 of the present embodiment will be briefly described with reference to FIGS.
As shown in FIG. 2, when the operation handle 3 is moved and operated in the upward direction Z1, the handle arm portion 52 rotates in the downward direction Z2 with a pin (not shown) as a fulcrum. By the rotation of the handle arm portion 52, the direction of the tensile load by the spring 104 is obliquely forward and upward from the position of the pins 105 and 106, and the link connecting pin 103 is pulled up.

  As a result, the second link 102 and the first link 101 of the opening / closing mechanism 100 extend in a straight line, and the cross bar 71 is swung in the rear direction X2 about the support shaft 72. As the cross bar 71 swings, the movable contact 7 moves in the direction approaching the fixed contact 6, the movable contact 70 contacts the fixed contact 60, and the breaker 1 is turned ON (input) shown in FIG. ) State.

  When the operation handle 3 is moved in the downward direction Z2 in the ON state of the breaker 1, as shown in FIG. 3, the handle arm portion 52 rotates in the upward direction Z1 with a pin (not shown) as a fulcrum. By the rotation of the handle arm portion 52, the direction of the tensile load by the spring 104 changes so as to pull the link connecting pin 103 obliquely forward and downward below the position of the pins 105 and 106.

  As a result, the second link 102 and the first link 101 of the opening / closing mechanism unit 100 are relatively rotated about the link connecting pin 103 and deformed into a bent state. Due to the bending deformation of the opening / closing mechanism 100, the cross bar 71 is swung in the forward direction X1 about the support shaft 72. As the cross bar 71 swings, the movable contact 7 is moved away from the fixed contact 6, the movable contact 70 is separated from the fixed contact 60, and the breaker 1 is turned off as shown in FIG. ) State.

  In addition, when an overcurrent flows through the breaker 1 in the ON state shown in FIG. 2, an overcurrent tripping device (not shown) operates to rotate the latch 110, and from the latch 110 as shown in FIG. The engagement of the locking claw 109 of the trip lever 107 is released. As a result, the trip lever 107 pivots forward and upward with the pin 108 as a fulcrum. As the trip lever 107 rotates, the operation handle 3 is moved to an intermediate position in the vertical direction Z, and the crossbar 71 is connected via the second link 102 and the first link 101 of the opening / closing mechanism 100. Is swung in the forward direction X1 about the support shaft 72. As the cross bar 71 swings, the movable contact 7 is moved away from the fixed contact 6, the movable contact 70 is separated from the fixed contact 60, and the breaker 1 is tripped as shown in FIG. It becomes.

Next, with reference to FIGS. 5 to 8, details of the operation handle 3 which is a characteristic part of the present invention will be described.
The operation handle 3 will be described in the order of the specific structure and the operation.

  FIG. 5 is a cross-sectional view schematically showing the internal structure of the operation handle 3 in the first state in which the handle portion 4 of the operation handle 3 extends toward the front side of the housing 2. FIG. 6 is a cross-sectional view schematically showing a state where the button member 8 is pressed in the first state. FIG. 7 is a cross-sectional view schematically showing a state in which the operating handle 3 is deformed from the first state to the second state in which the handle portion 4 extends along the front surface of the housing 2 while the button member 8 is pressed. is there. FIG. 8 is a cross-sectional view schematically showing the internal structure of the operation handle 3 in the second state.

  As shown in FIGS. 5 to 8, the operation handle 3 includes a handle portion 4 and an arm portion 5 connected to the handle portion 4. The handle portion 4 includes a distal end side portion 41 having a rectangular tube shape opening toward one end side thereof, and a proximal end portion 42 having a pair of left and right side plates. The arm portion 5 includes a distal end portion 51 having a rectangular cross section and a handle arm portion 52. The handle arm portion 52 is a portion that is integrally fixed to the proximal end of the distal end side portion 51 and rotates in the vertical direction Z inside the housing 2.

  In a state where the distal end side portion 51 of the arm portion 5 is fitted into the proximal end portion 42 (between the pair of left and right side plates) of the handle portion 4, the horizontal pin 10 is connected to the proximal end portion 42 of the handle portion 4 and the arm portion 5. Is inserted in the left-right direction Y. Thereby, the handle portion 4 is configured to be rotatable with respect to the arm portion 5 around the horizontal pin 10.

  That is, the handle portion 4 is configured to be deformable into a first state (see FIG. 5) and a second state (see FIG. 8). As shown in FIG. 5, the first state is formed by rotating the handle portion 4 with respect to the arm portion 5 so that the direction in which the handle portion 4 extends matches the direction in which the arm portion 5 extends. . “The direction in which the handle part 4 extends and the direction in which the arm part 5 extends” only need to match both directions when viewed macroscopically. In the first state, the handle portion 4 extends toward the front side of the housing 2 as shown by the dotted lines in FIGS. 2 and 3. The phrase “extending toward the front side of the casing 2” only needs to extend toward the front side of the casing 2 when viewed macroscopically.

  As shown in FIG. 8, the second state is formed by rotating the handle part 4 with respect to the arm part 5 so that the direction in which the handle part 4 extends does not coincide with the direction in which the arm part 5 extends. . In the second state, the handle portion 4 extends along the front surface of the housing 2 as shown by the solid lines in FIGS. 2, 3, and 4. The phrase “extending along the front surface of the housing 2” only needs to extend along the front surface of the housing 2 when viewed macroscopically. Specifically, the handle portion 4 is configured to extend along the downward direction Z2 of the housing 2 in the second state.

  As shown in FIGS. 1 to 4, the handle portion 4 protrudes from the front surface 22 of the front protruding portion 20 through the window hole 21 of the front protruding portion 20 of the housing 2 in the first state. In the second state, the handle portion 4 is housed inside the window hole 21 of the front protruding portion 20 of the housing 2 and does not protrude from the front surface 22 of the front protruding portion 20.

  As shown in FIGS. 5 to 8, the handle portion 4 includes a leaf spring member 9 and a button member 8 inside the distal end side portion 41. The leaf spring member 9 extends along the direction in which the handle portion 4 extends. The button member 8 presses the leaf spring member 9 in the thickness direction of the leaf spring member 9 to deform the leaf spring member 9 into a concave curved state.

The other end portion (front end portion) of the leaf spring member 9 is fixed to a fixed position inside the handle portion 4 via a stopper 91. The other end portion side of the leaf spring member 9 is an elastic portion 93 that is easily elastically deformed. One end portion (rear end portion) of the leaf spring member 9 forms a slide portion 90. The elastic part 93 and the slide part 90 are integrally connected. The slide portion 90 slides in the front-rear direction X in response to the deformation of the elastic portion 93 of the leaf spring member 9 to the curved state and the deformation of the elastic portion 93 of the leaf spring member 9 to the extended state due to the elastic restoring force. It is a part.
The slide portion 90 is formed to be thicker than the elastic portion 93 and linearly slides in the front-rear direction X along a slide guide 92 fixed inside the distal end portion 41 of the handle portion 4.

  The button member 8 is disposed inside the through hole 45 formed in the upper surface of the distal end side portion 41 of the handle portion 4 so as to be movable in the thickness direction of the leaf spring member 9. The button member 8 has a shaft member 80 extending downward from the lower surface thereof. The lower end portion of the shaft member 80 is positioned corresponding to the central portion in the longitudinal direction of the elastic portion 93 of the leaf spring member 9. A coil spring 81 is interposed between the lower surface of the button member 8 and the spring receiver 46 fixed inside the distal end portion 41 of the handle portion 4.

  As shown in FIG. 5, the button member 8 is normally biased by the coil spring 81 so that the lower end portion of the shaft member 80 is separated above the elastic portion 93 of the leaf spring member 9. As shown in FIG. 6, the button member 8 presses the elastic portion 93 of the leaf spring member 9 by the lower end portion of the shaft member 80 when the button member 8 is pushed down against the urging force of the coil spring 81. Thus, the elastic portion 93 of the leaf spring member 9 is configured to be deformed into a concave curved state.

  As shown in FIGS. 5 to 8, the arm portion 5 includes a first recess 53 and a second recess 54. The first recessed portion 53 is a recessed portion that faces the slide portion 90 that is one end portion of the leaf spring member 9 in the first state shown in FIGS. 5 and 6. The first recessed portion 53 is formed on the front end wall surface of the distal end side portion 51 having a rectangular tube cross section of the arm portion 5. The second recess 54 is a recess facing the slide portion 90 in the second state shown in FIGS. 7 and 8. The second concave portion 54 is formed on the lower side wall surface of the distal end side portion 51 of the arm portion 5 having a cylindrical cross section.

  When the handle portion 4 is in the first state, as shown in FIG. 5, the handle portion with respect to the arm portion 5 is engaged with the rear end portion of the slide portion 90 of the leaf spring member 9 and the first recessed portion 53. 4 is restricted. Accordingly, the first state in which the direction in which the handle portion 4 extends and the direction in which the arm portion 5 extends is fixedly held (locked).

  Further, when the handle portion 4 is in the second state, as shown in FIG. 8, the rear end portion of the slide portion 90 of the leaf spring member 9 is engaged with the second recessed portion 54, so that the arm portion 5 can be moved. The rotation of the handle portion 4 is restricted, whereby the second state in which the direction in which the handle portion 4 extends and the direction in which the arm portion 5 extends does not coincide with each other is fixedly held (locked).

  Then, when the handle portion 4 is in the first state or the second state, the elastic member of the leaf spring member 9 is operated by operating the button member 8 to press the leaf spring member 9, as shown in FIG. By deforming 93 into a concave curved state, the engagement between the rear end portion of the slide portion 90 of the leaf spring member 9 and the first concave portion 53 or the second concave portion 54 is released, and the handle portion 4 Switching between the first state and the second state is possible.

Next, with reference to FIGS. 5 to 8, the operation of the operation handle 3 which is a characteristic part of the breaker 1 of the present embodiment will be described.
When the breaker 1 is switched from the ON state shown in FIG. 2 to the OFF state shown in FIG. 3 and when the breaker 1 is switched from the OFF state shown in FIG. 3 to the ON state shown in FIG. As described above, the handle portion 4 is rotated around the horizontal pin 10 so that the extending direction of the handle portion 4 and the extending direction of the arm portion 5 coincide with each other.

  In this first state, by engaging the rear end portion of the slide portion 90 of the leaf spring member 9 with the first recess 53, the rotation of the handle portion 4 is restricted, and the handle portion 4 is locked in the first state. Is done. Thereby, the handle | steering-wheel part 4 will be exposed to the front exterior rather than the front surface 22 of the front protrusion part 20 of the housing | casing 2, as shown by the dotted line of FIG.2 and FIG.3. As described above, the handle unit 4 can perform the switching operation from the ON state to the OFF state and the switching operation from the OFF state to the ON state as predetermined.

  Then, after the switching operation, as shown in FIG. 6, the button member 8 is pushed down against the urging force of the coil spring 81 through the fingers, so that the leaf spring member 9 is moved by the lower end portion of the shaft member 80. By pressing the elastic part 93, the leaf spring member 9 is deformed into a concave curved state. Thereby, the engagement between the rear end portion of the slide portion 90 connected to the leaf spring member 9 and the first recess 53 is released, and the rotation of the handle portion 4 with respect to the arm portion 5 is allowed.

  6, by rotating the handle portion 4 downward about the horizontal pin 10 with respect to the arm portion 5, the direction in which the handle portion 4 extends matches the direction in which the arm portion 5 extends. A second state is formed. In this second state, the handle portion 4 extends in the downward direction Z2 along the front surface of the housing 2 as shown by the solid line in FIGS.

  In this second state, when the finger is released from the button member 8 to release the push-down operation force, the elastic portion 93 of the leaf spring member 9 is restored from the curved state to the straight state as shown in FIG. The rear end portion of the slide portion 90 of the member 9 is engaged with the second recess 54. Thereby, the rotation of the handle portion 4 is restricted, and the handle portion 4 is locked in the second state.

  Further, as shown by the solid lines in FIGS. 2 and 3, the handle portion 4 does not protrude forward from the front surface 22 of the front protrusion portion 20 of the housing 2 and is housed in the window hole 21. . Therefore, it is possible to prevent a person or an object from unintentionally touching the handle portion 4 of the operation handle 3 to cause the breaker 1 to operate unintentionally (connection or disconnection of a circuit), that is, to prevent a malfunction. can do.

  As shown in FIG. 4, even when the breaker 1 is tripped, the handle portion 4 remains locked in the second state, and the handle portion 4 is more than the front surface 22 of the front protruding portion 20 of the housing 2. Does not protrude forward and is housed inside the window hole 21. Therefore, there is no possibility that a person or an object unintentionally touches the handle portion 4 of the operation handle 3 in a trip state and causes the breaker 1 to malfunction.

According to the breaker 1 of this embodiment, the following effects are produced, for example.
In the breaker 1 of the present embodiment, the handle portion 4 of the operation handle 3 is configured to be deformable into a first state extending toward the front side of the housing 2 and a second state extending along the front surface of the housing 2. Has been.

Therefore, according to the breaker 1 of the present embodiment, after the handle portion 4 is operated to the ON state or the OFF state, the handle portion 4 to the front outside of the housing 2 is deformed by deforming the handle portion 4 to the second state. The amount of protrusion can be reduced.
Therefore, after the breaker 1 is operated to the ON state or the OFF state, a person or an object may unintentionally touch the handle portion 4 of the operation handle 3 to cause the breaker 1 to operate unintentionally, that is, malfunction. Can be sufficiently prevented.

  Since malfunctions can be prevented, unnecessary interruptions can be prevented, and as a result, for example, stoppage of facilities, stoppage of a factory line due to a power failure, etc. can be prevented. In addition, since unnecessary connection can be prevented, it is possible to prevent mistakes related to human life, such as accidentally transmitting power to a place where a person is working in a power failure state.

  Moreover, since the protrusion part to the front side of the breaker 1 is small, it is easy to install the breaker 1 in a narrow installation space or a narrow passage.

  Moreover, in the breaker 1 of this embodiment, the handle part 4 has the button member 8 and the leaf | plate spring member 9, and the arm part 5 connected with the handle part 4 is the leaf | plate spring member 9 in a 1st state. A first concave portion 53 that faces the end portion of the slide portion 90, and a second concave portion 54 that faces the end portion of the slide portion 90 in the second state. The breaker 1 of the present embodiment engages the end of the slide portion 90 with the first recess 53 in the first state, and engages the end of the slide portion 90 with the second recess 54 in the second state. It is configured to let you.

Therefore, according to the breaker 1 of this embodiment, the handle part 4 switched to the 1st state and the 2nd state is operated by operating the button member 8 in any case of a 1st state and a 2nd state. The arm unit 5 can be locked.
Therefore, the breaker 1 can be switched on and off via the operation handle 3 with certainty, and after the switching operation, the state in which the amount of protrusion of the handle portion 4 to the outside is reduced is reliably maintained. be able to.

Furthermore, in the breaker 1 of the present embodiment, the handle portion 4 does not protrude from the front surface 22 of the housing 2 in the second state, that is, inside the window hole 21 of the front protruding portion 20 of the housing 2. It is configured to be deformable so that it can be accommodated.
Therefore, in the second state, the protrusion amount of the handle portion 4 to the outside of the front side of the housing 2 is zero. Therefore, malfunction of the breaker 1 can be prevented.

As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above. For example, in the above-described embodiment, the handle portion 4 is configured to extend in the downward direction Z2 along the front surface of the housing 2 in the second state, but the handle portion 4 extends along the front surface of the housing 2 in the second state. It may be configured to extend in the upward direction Z1.
In addition, the effects exhibited by the embodiment of the present invention are merely the most preferable effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiment of the present invention.

1 Circuit breaker (breaker)
2 Housing 3 Operation handle 4 Handle part 5 Arm part 6 Fixed contact 7 Movable contact 8 Button member 9 Leaf spring member 53 1st recessed part 54 2nd recessed part

Claims (5)

An insulating housing;
A fixed contact provided inside the housing and having a fixed contact;
A movable contact having a movable contact approaching or separating from the fixed contact;
An operating handle that has a handle portion exposed to the outside of the housing, and moves the movable contact toward or away from the fixed contact by rotating with respect to the housing;
With
The said handle part is a circuit breaker comprised so that a deformation | transformation into the 1st state extended toward the front side of the said housing | casing and the 2nd state extended along the front of the said housing | casing is possible. The operation handle has an arm portion connected to the handle portion,
The handle portion is configured to be rotatable with respect to the arm portion,
The first state is formed by a direction in which the handle portion extends and a direction in which the arm portion extends,
2. The circuit breaker according to claim 1, wherein the second state is formed when a direction in which the handle portion extends and a direction in which the arm portion extends do not coincide with each other. The handle portion includes a leaf spring member extending along a direction in which the handle portion extends, and a button member that presses and deforms the leaf spring member.
The arm portion has a first recess facing the one end of the leaf spring member in the first state, and a second recess facing the one end of the leaf spring member in the second state,
One end of the leaf spring member engages with the first recess in the first state, engages with the second recess in the second state,
By operating the button member to press and deform the leaf spring member, the engagement between one end portion of the leaf spring member and the first recess or the second recess is released, and the first state The circuit breaker according to claim 2, wherein the second state is configured to be switchable. The circuit breaker according to any one of claims 1 to 3, wherein the handle portion does not protrude from the front surface of the housing in the second state. The circuit breaker according to any one of claims 1 to 4, wherein the handle portion extends along a vertical direction of the housing in the second state.

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