JP2005353443A - Circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit breaker capable of expressly notifying a user that a contact is welded if at all without his or her knowing of a state of the circuit breaker by a position of a handle, and reducing induction of inadvertent electric shock without the user feeling at a loss. <P>SOLUTION: The circuit breaker connected to an electric line and having a contactor for switching current flowing in the line, in which an operating part of a handle in a handle member arranged so as to make a switching operation and set so as to protrude outside from a part of a body constituting the breaker stops to move at points other than an on-position or an off-position when the contactor is welded by short-circuit current, is provided with a contactor welding display means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a circuit breaker, and more particularly to a circuit breaker having a function of displaying the welding of a contact.

In the conventional circuit breaker, when the movable plate and the fixed contact are welded and the engagement between the operating plate and the pressing member is released, the handle is moved when the handle moves from the on position to the off position. When the linkage member is provided between the engaging portion of the pressing member and the link mounting portion and between the rotating member so as to stop at an intermediate position between the on position and the off position, and the handle moves from the on position to the off position. The operation plate is provided with a rotation preventing portion for holding the engaging portion of the pressing member so that the pressing member is prevented from rotating by the link provided on the handle. was there.

JP 2002-83531 A (No. 0005, FIG. 6)

However, in the normal use of a circuit breaker, the handle is usually located at either the on position or the off position. For users of residential distribution boards, it is necessary to know in advance the state of the circuit breaker when the handle stops at an intermediate position between the on position and the off position. There was a problem that it was difficult. In addition, when the handle is neutral due to the welded contacts, current may flow through the circuit, and the handle cannot be operated to the off position. There was a risk of opening the cover and checking the inside, leading to an electric shock.

Therefore, the object of the present invention is to explicitly notify the user that welding has occurred without knowing the state of the circuit breaker depending on the handle position when the contact is welded. It is to provide a circuit breaker that can reduce the occurrence of inadvertent electric shock without user confusion.

In order to solve the above problems, in the invention of claim 1,
A circuit breaker having a contact that is connected to an electric circuit and that opens and closes a current flowing in the electric circuit, and is configured to open and close the contact when the contact is welded by a short-circuit current. In the circuit breaker in which the operation portion of the handle in the handle member provided so as to protrude outward from a part of the body stops moving to other than the on position or the off position,
The present invention provides a circuit breaker characterized by providing contact welding display means.
This allows the user to indicate that welding has occurred without knowing the implications of the position of the handle operating part when the handle operating part of the circuit breaker stops moving other than the on or off position. By means of the contact welding display means, it is possible to explicitly know that welding has occurred in the circuit breaker, and the user is not confused, such as opening the distribution board cover and operating the inside. It is possible to reduce the induction of electrical shock.

According to a second aspect of the present invention, the contact welding display means is provided in the vicinity of a handle operating portion of a handle member provided so as to protrude outward from a part of the body. A circuit breaker according to claim 1 is provided.
As a result, when the operating part of the handle stops moving to a position other than the on position or the off position in the circuit breaker, the user can display the contact welding display shown in the vicinity of the stopped position of the operating part of the handle. By means, it is possible to explicitly know that welding has occurred in the circuit breaker without knowing the meaning of the handle stop position, and the user can open the switchboard cover and operate the inside without being confused. It is possible to reduce the induction of inadvertent electric shock.

According to a third aspect of the present invention, the contact welding display means is provided with a welding display visual recognition portion on the handle member, and the operation portion of the handle is moved from the on position to the cutting position when welding occurs on the body. A display unit is provided that can visually recognize the welding display visual recognition part at a position where movement stops, and when the contact is welded, the welding display visual recognition part is exposed from the display part. The circuit breaker according to Item 2 is provided.
As a result, when the operation part of the handle stops at a position other than the on or off position in the circuit breaker, the user is provided in the vicinity of the stop position of the operation part of the handle. Because the welded display visual indicator that shows the is exposed from the display part of the container, it is possible to explicitly know that welding has occurred in the circuit breaker without knowing the meaning of the handle stop position. It is possible to reduce the occurrence of inadvertent electric shock, such as opening the switchboard cover and operating the inside without the user being confused.

According to a fourth aspect of the present invention, the contact welding display means is provided with a welding instruction portion at a position where the operation portion of the handle stops moving from the on position to the cutting position when welding occurs on the container. The circuit breaker according to claim 2, wherein when the contact is welded, the welding operation unit indicates a stop position of the handle operating part at the time of welding.
As a result, when the operation unit of the handle stops moving to a position other than the on position or the off position in the circuit breaker, the user uses the welding instruction unit provided at the stop position of the operation unit of the handle to Without knowing the implications of the stop position, it is possible to explicitly know that welding has occurred in the circuit breaker, and the user will not be confused, such as opening the switchboard cover and operating the inside. It is possible to reduce the induction of electrical shock.

According to the present invention, when the contacts are welded, it is possible to explicitly notify the user that the welding has occurred without knowing the state of the circuit breaker depending on the handle position. It is possible to provide a circuit breaker that can reduce the occurrence of inadvertent electric shock without being confused.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the operation when the handle operating portion of the handle member is located between the on position and the off position will be described. FIG. 1 shows a structural diagram when the circuit breaker of the present invention is turned on, and FIG. 2 shows a structural diagram when the circuit breaker is turned off. FIG. 3 shows a structural diagram in the case where the handle operating portion is positioned between on and off in a state where the contact is welded and the operating plate and the holding member are disengaged due to an abnormal current. It is a thing.

The circuit breaker in FIGS. 1 to 3 includes a handle member 101, an operation portion 1010 of the handle, a pressing member 103, a link 102 that couples the handle member 101 and the pressing member 103, a fixed contact 105, and a fixed The contact 107, the movable contact 109, the movable contact 111, the cross bar 113, the actuating plate 104, and the linkage member 114 that links the pressing member 103 and the cross bar 113 are configured.

The handle member 101 is rotatably disposed in the case, is always biased in the direction of the cut-off position by a spring, and is linked to the pressing member 103 by a link 102. The pressing member 103 is provided with an engaging portion 10302 for engaging with the operation plate 104 at one end, and provided with a linking member mounting portion 10303 for attaching the linking member 114 for linking the cross bar 113 and the pressing member 103 to the other end. An attachment portion 10301 for the link 102 that is linked to the handle member 101 is provided between the engagement portion 10302 and the linkage member attachment portion 10303.

The movable contact 111 is always urged in the direction of separating from the fixed contact 107, and the cross bar 113 is urged in the same direction. In a state where the engaging portion 10302 of the pressing member 103 and the operation plate 104 are engaged, the pressing member 103 is rotated via the link 102 by rotating the handle member 101 from the entering position in FIG. 1 to the cutting position in FIG. The engaging portion 10302 is rotated in the clockwise direction in the figure, the interlocking material 114 and the crossbar 113 are operated in conjunction with the operation of the pressing member 103, and the movable contact 109 is opened from the fixed contact 105. Release.

The linking member 114 is a member provided to operate the pressing member 103 and the cross bar 113 in conjunction with each other. The linking member 114 links the operation of the pressing member 103 and the cross bar 113 when turning on and off, and presses when the contact is welded. It has a role of regulating the movement of the member 103.

Next, the operation from turning off in FIG. 2 to turning on in FIG. 1 will be described. In FIG. 2, the operation plate 104 and the pressing member 103 are engaged. When the handle member 101 is rotated from the cut position in FIG. 2 to the entry position in FIG. 1, the attachment portion of the handle member 101 and the link 102 is rotated along the rotation direction of the handle member 101. Since the link 102 is linked to the pressing member 103, the pressing member 103 is pressed. However, since the pressing member 103 is engaged with the operating plate 104, the engaging portion 10302 is used as a fulcrum to rotate counterclockwise in the figure. It rotates. As a result, the linking member mounting portion 10303 of the pressing member 103 operates to push down the linking member 114, and the cross bar linked to the linking member 114 operates to press down the movable contact 109 in conjunction with the movable contact 109. 111 and the fixed contact 107 are urged to open. In the above description, the direction of movement of the link attachment portion 10301 and the cross bar 113 is regulated as shown by the guides 115 and 116 in FIG. Further, the cross bar and the movable contact 109 are engaged with each other by engagement (not shown).

FIG. 3 shows a state in which the movable contact 111 and the fixed contact 107 are welded. In this state, since the cross bar 113 is configured to be interlocked with the movable contact 109, its position cannot be changed. Since the handle member 101 is always urged by the spring in the direction of the cut position, the handle member 101 tries to rotate in the direction of the cut position in FIG. 2, and the link 102 connected to the handle member 101 follows the direction of rotation of the handle. The link member is interlocked with the cross bar 113, so that the pressing member 103 receives a force to rotate counterclockwise in the figure with the link member mounting portion 10303 as a fulcrum. However, the engaging portion 10302 of the pressing member 103 rotates to the position of the rotation preventing portion 10401 provided on the operation plate 104, and the rotation operation is restricted when it contacts the rotation preventing portion 10401. The handle member 101 is restricted from rotating in the cutting direction, and stops between the entering position and the cutting position.

Here, in the absence of the linking member 113 and the rotation preventing portion 10401, there is nothing that restricts the operation of the pressing member 103, so that the handle is turned to the cut position by the force by which the handle spring biases the handle member 101 in the cutting direction. Rotate to

Therefore, in this embodiment, when the contact is welded, the handle member 101 can be stopped between the on position and the off position. In this case, the contact welding display means is provided in the vicinity of the position where the handle member 101 stops, so that the user can stop the operation portion of the handle in the circuit breaker from moving to a position other than the on position or the off position. By means of the contact welding display means shown in the vicinity of the stop position of the operation part of the handle, it is possible to explicitly know that welding has occurred in the circuit breaker without knowing the meaning of the stop position of the handle. It is possible to reduce the occurrence of inadvertent electric shock, such as opening the switchboard cover and operating the inside without being confused by the user.

Next, the circuit breaker to which the present invention is applied will be described in detail. This circuit breaker is an example of a two-pole circuit breaker having a unique structure in which a rotating crossbar has two movable contacts extending substantially symmetrically with respect to the center of rotation. FIG. 4 shows a schematic structure when the circuit breaker of the second embodiment of the present invention is turned off, and FIG. 5 shows a schematic structure when the circuit breaker is turned on. FIG. 6 shows a schematic structure when the handle is positioned between on and off in a state where the contact is welded and the operating plate is disengaged from the pressing member due to an abnormal current. is there. FIG. 7 is a view showing contact welding display means. Moreover, the display part of the container is shown. FIG. 8 is a view showing a welding display visual recognition portion in the handle member. FIG. 9 is a diagram showing a welding instruction section.

In FIG. 4, this circuit breaker includes a handle member 1 having a handle operating portion 1001, a pressing member 3, a link 2 connecting the handle member 1 and the pressing member 3, fixed contacts 5, 6 and fixed contacts. 7, 8, movable contacts 9, 10, movable contacts 11, 12, a rotating member 13, an operation plate 4, and a linkage member 14 that links the pressing member 3 and the rotating member 13. It is configured.

A handle member 1 that is rotatably arranged in the case and is urged by a spring in the direction of the normally cut position in FIG. 4 is linked to a pressing member 3 by a link 2. The holding member 3 is provided with an engaging portion 302 for engaging the operating plate 4 at one end, and provided with an attachment portion 301 for the link 2 linked to the handle member 1 at the other end, and a linkage member for attaching the linkage member 14 therebetween. An attachment portion 303 is provided. The linkage member 14 is attached between the interlocking member attachment portion 303 of the pressing member 3 and the rotation member 13.

The rotating member 13 is always urged in the direction in which the movable contacts 11 and 12 are separated from the fixed contacts 7 and 8, and the handle member is engaged with the engaging portion 302 of the pressing member 3 and the operation plate 4. 5 is rotated from the entry position in FIG. 5 to the cut position in FIG. 4, the pressing member 3 is rotated counterclockwise in the figure by the link 2 interlocked with the handle member 1 with the engaging portion 302 as a fulcrum. , And the rotating member 13 is biased in the opening direction, so that the movable contacts 9, 10 are separated from the fixed contacts 5, 8.

The linking member 14 is a member provided to operate the pressing member 3 and the rotating member 13 in conjunction with each other, and the operation of the pressing member 3 and the rotating member 13 at the time of turning on, turning off, and contact welding. And has a role of regulating the movement of the pressing member 3 during contact welding.

Next, the operation from the time of turning off in FIG. 4 to the time of turning on in FIG. 5 will be described. In FIG. 4, the operation plate 4 and the pressing member 3 are engaged. When the handle member 1 is rotated from the cut position in FIG. 4 to the entry position in FIG. 5, the attachment portions of the handle member 1 and the link 2 are also rotated. Since the link 2 is linked to the pressing member 3, it presses the pressing member 3, but since the pressing member 3 is engaged with the operation plate 4, the link 2 rotates clockwise with the engaging portion 302 as a fulcrum. It works. As a result, the linking member mounting portion 303 of the pressing member 3 operates to push down the linking member 14, and the rotating member 13 linked to the linking member 14 is also linked to rotate in the direction in which the contact interval is narrowed. 11 and 12 and the fixed contacts 7 and 8 are urged to contact.
In the circuit breaker having the structure shown in FIGS. 4 and 5, since the movable contacts 9 and 10 extend symmetrically about the rotation axis of the rotation member 13, the thickness of the circuit breaker is movable. It has a structure suitable for constructing a thin two-pole circuit breaker with a thickness of one contact.

FIG. 6 shows a state in which the operating plate 4 is disengaged in a state where the movable contacts 11 and 12 and the fixed contacts 7 and 8 are welded due to an abnormal current. In this state, the rotating member 13 is urged to rotate in the direction in which the movable contacts 9 and 10 and the stationary contacts 5 and 8 are urged to the open position, but the contact is welded. The position of the rotating member 13 cannot be changed. Since the handle member 1 is always biased by the spring in the direction of the cut position, the handle member 1 tries to rotate in the direction of the cut position, and the link 2 connected to the handle member 1 is pulled up along the direction of rotation of the handle. The pressing member 3 receives a force in a direction in which the holding member 303 is rotated about the rotation axis. As a result, the engaging portion 302 rotates downward in the figure, and the link attachment portion 301 tries to rotate upward in the figure, but the engaging portion 302 of the pressing member 3 is a rotation provided on the operation plate 4. The rotation operation is restricted to the position of the movement prevention unit 401, and the rotation operation is restricted when the rotation prevention unit 401 comes into contact. Since the rotation operation is restricted by the linkage member attaching portion 303 and the rotation preventing portion 401, the position of the pressing member 3 is fixed. Therefore, the handle member 1 is restricted in the middle of the turning operation in the cutting direction, and is stopped between the entering position and the cutting position.

Here, when there is no rotation preventing portion 401, there is nothing that restricts the operation of the pressing member 3, and therefore the handle is rotated to the cutting position by the force by which the handle spring biases the handle member 1 in the cutting direction. To do.

Therefore, in the present embodiment, when the contact is welded, the handle member 1 can be stopped between the on position and the off position.

FIG. 7 shows contact welding display means 200. A display unit 201 is provided in the vicinity of the handle operation unit 1001 in the handle member 1 provided so as to protrude outward from a part of the container body 20, and when the circuit breaker is arranged in parallel, the handle of the handle member 1 A welding display visual recognition unit 1002 is provided on a surface facing the operation unit 1001.

FIG. 8 shows an enlarged view of the handle member 1. The welding display visual recognition part 1002 shows the characters “welding”. When welding occurs, the handle operating part 1001 is moved to a position where it has stopped moving between the on position and the off position. Is provided with a notch 201 which is a display part, and the welded display visual recognition part 1002 of the handle member 1 can be exposed from the notch 201. For this reason, when the user faces the handle member 1, the indication “welding” is explicitly displayed, so that the welding has occurred without knowing the meaning of the circuit breaker depending on the position of the handle in advance. It is possible to know without confusion.

FIG. 9 shows a welding instruction portion 202 provided in the vicinity of the handle operating portion 1001 in the handle member 1 provided so as to protrude from a part of the container 20 to the outside.
When welding has occurred, an arrow indicating the handle operating unit 1001 and a character “welding” are shown at a position where the handle operating unit 1001 stops moving between the on position and the off position. For this reason, in order to explicitly indicate that “welding” has occurred at the position where the handle operating unit is stopped, the welding operation is performed without knowing the meaning of the circuit breaker depending on the position of the handle in advance. It is possible to know what happened without being confused.

Further, in the embodiment, the occurrence of welding is explicitly shown using the characters “welding”, but the welding display visual recognition unit 1002 is displayed by colors, for example, by colors such as red, blue, and yellow. It may be displayed, and the display by the color from the notch 201 may be inspected so that it is welded. In this case, it is desirable to separately describe the meaning of the colors used so that the user can clearly understand when facing the operation unit 1001 of the handle of the circuit breaker.

Since it can be confirmed whether or not the contacts are welded, it can be used not only for circuit breakers but also for all devices having a switching contact function.

The structure figure at the time of the entrance in the Example of this invention. The structure figure at the time of cutting in the Example of this invention. The structure figure at the time of contactor welding in the Example of this invention. The structure figure at the time of cutting in the Example of this invention. The structure figure at the time of the entrance in the Example of this invention. The structure figure at the time of contactor welding in the Example of this invention. The figure which showed the contact welding display means of this invention. The figure which showed the welding instruction | indication visual recognition part of this invention. The figure which showed the welding instruction | indication part of this invention. The figure which showed the prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Handle member 1001 Operation part 2 of a handle 3 Link 3 Holding member 301 Link attachment part 302 Engagement part 303 Linking member attachment part 4 Actuation plate 401 Anti-rotation part 5 Fixed contact 6 Fixed contact 7 Fixed contact 8 Fixed contact 9 Movable Contactor 10 Movable contactor 11, 111 Movable contact point 12 Movable contact point 13 Rotating member 14 Linking member 15 Case 16 Notch portion 17 Welding display portion 101 Handle member 1010 Handle operation portion 102 Link 103 Holding member 10301 Link attachment portion 10302 Engagement Joint portion 10303 Linking member mounting portion 104 Actuating plate 10401 Rotation preventing portion 105 Fixed contact 107 Fixed contact 109 Moving contact 111 Moving contact 113 Crossbar 114 Linking member 20 Body 200 Contact welding display means 201 Display (notch) )
202 Welding instructions

Claims (4)

A circuit breaker having a contact that is connected to an electric circuit and that opens and closes a current flowing in the electric circuit, and is configured to open and close the contact when the contact is welded by a short circuit current. In the circuit breaker in which the operation portion of the handle in the handle member provided so as to protrude from a part of the switch stops moving to a position other than the on position or the off position,
A circuit breaker comprising contact welding display means. 2. The circuit breaker according to claim 1, wherein the contact welding display means is provided in the vicinity of an operating portion of a handle in a handle member provided so as to protrude from a part of the vessel body to the outside. The contact welding display means is provided with a welding display visual recognition portion on the handle member, and the welding display visual recognition portion at a position where the operation portion of the handle stops moving from the on position to the cutting position when welding occurs on the body. 3. The circuit breaker according to claim 2, wherein a display unit capable of visually recognizing the display is provided, and when the contact is welded, the welded display visual recognition unit is exposed from the display unit. The contact welding display means is provided with a welding instruction portion at a position where the operation portion of the handle stops moving from the on position to the cutting position when welding occurs on the container, and when the contact is welded, 3. The circuit breaker according to claim 2, wherein a stop position of the operation portion of the handle during welding is indicated by the welding instruction portion.

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