JP2009087688A - Circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit breaker capable of easily confirming that an electric wire has been connected, and capable of miniaturizing a case since a wire connection confirming mechanism for preventing the operation of an operation handle while wire connection is in an incomplete state is compact. <P>SOLUTION: The wire connection confirming mechanism 16 comprises: a first slide member 17 which is to be pushed by a wire 4 inserted into a wire insertion hole 11 of a quick connection terminal 5 and slides in the insertion direction of the wire resisting against the biasing force of a first elastic member 18; a second slide member 19 which is arranged so as to be substantially orthogonal by engagement with the first slide member 17, is provided slidably by being biased by the biasing force of a second elastic member 20, and slides in the direction of the operation handle by the biasing force of the second elastic member 20 while the engagement is released by the slide of the first slide member 17; and a lock member 21 which releases the lock from the state where an operation handle 3 is locked in an off position relative to the slide of the second slide member 19, and projects from the upper surface of a case 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a structure for confirming completion of connection of an electric wire connected to a quick connection terminal of a circuit breaker.

  Conventionally, as a method for confirming the completion of connection of an electric wire connected to a quick connection terminal of a circuit breaker, there is one disclosed in Patent Document 1, for example. This circuit breaker has an engaging piece (11) for operating a switching mechanism (8) in response to a tripping operation of a tripping device (15) in the event of an electric circuit abnormality such as overcurrent, and an electric wire for a load side terminal (4). It is provided so as to slide in conjunction with the insertion of the electric wire (19) while being biased by the spring (20) in the direction opposite to the insertion direction. When the electric wire (19) is not inserted in the load side terminal (4), the engagement piece (11) is moved to the load side terminal (4) side by the spring (20), whereby the engagement concave portion ( 11b) so that the trip arm (12) of the opening / closing mechanism (8) is not engaged, so that even if the operation handle (9) is turned on, the opening / closing mechanism (8) does not interlock and the operation handle (9 ) Also does not stop at the on position, so it cannot be turned on. When a predetermined amount of the electric wire (19) is inserted into the quick connection terminal (4), the tip of the electric wire (19) pushes the movable plate (17), and the latching piece (11) is moved to the opening / closing mechanism portion (8) side. Since the trip arm (12) is engaged with the engaging recess (11b) of the engaging piece (11), the opening / closing mechanism (8) is interlocked when the operation handle (9) is turned on. The handle (9) is also stopped at the on position and can be turned on. Thus, the completion of the connection of the electric wire is confirmed depending on whether or not the operation handle can be turned on.

JP 2006-221894A

  In the conventional circuit breaker wire insertion confirmation structure, when the handle operating surface of the case is on the upper side and the load side terminal is on the right side, the hooking piece takes up space in the upper and lower sides of the case and interlocks with the insertion of the wire As a result, a space for moving the hooking piece in the left-right direction is required, so that the case becomes large. In addition, since the completion of the connection of the electric wire must be determined only by whether or not the operation handle can be turned on, there is a possibility that it may be mistaken for a failure, and there is a drawback that it is difficult to understand.

  According to the first aspect of the present invention, the operation handle is provided on the upper surface of the case, and the circuit is provided with a plurality of quick connection terminals for inserting and connecting electric wires on one side of the left and right ends of the case. In the circuit breaker, when the wire is inserted into the wire insertion hole of the quick connection terminal and connected, it is pushed by the tip of the wire and resists the biasing force of the first elastic member that biases in the direction opposite to the wire insertion direction. The first slide member that slides in the direction of inserting the electric wire and the first slide member that is locked to the first slide member and arranged substantially orthogonally, and is urged and slid by the urging force of the second elastic member in the direction of the operation handle A second slide member that is slidable in the direction of the operation handle by the biasing force of the second elastic member and is released by the slide of all the first slide members, and interlocked with the slide of the second slide member Turn off the operating handle Unlock the locked state to the location, and further comprising a wire connection confirmation mechanism consisting of a locking member for displaying protruding from the upper surface of the case.

  According to the second aspect of the present invention, the circuit breaker includes a three-pole quick connection terminal in the vertical direction of the end surface on one side of the case, and any one of the wire insertion holes of the three-pole quick connection terminal. A blind cover that arbitrarily covers the wire insertion hole of the quick connection terminal is provided so as to be slidable along the end surface of the case, and the first slide member is provided so as to protrude from the surface provided with the wire insertion hole of the case, When the blind cover is slid to cover the wire insertion hole of any one of the quick-connect terminals, the protrusion of the first slide member is pushed into the case to release the locking with the second slide member. It is characterized by that.

  According to the first aspect of the present invention, since the electric wire connection confirmation mechanism is compact and does not take a storage space, the case can be reduced in size, and the electric wire connection confirmation can be performed by checking the lock state of the operation handle and the lock member. Since it can be confirmed by two means of display by, there is an effect that it is easy to understand.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, in the circuit breaker provided with the three-pole quick-connect terminal, any two-pole fast-connect terminal is selected. When connecting the electric wires, there is an effect that the locking of the first slide member and the second slide member of the quick connection terminal to which the electric wires are not connected can be easily released.

  The circuit breaker resists the biasing force of the first elastic member that is pushed by the tip of the wire and biased in the direction opposite to the wire insertion direction when the wire is inserted into the wire insertion hole of the quick connection terminal and connected. The first slide member that slides in the direction of inserting the electric wire and the first slide member that is locked to the first slide member and arranged substantially orthogonally, and is urged and slid by the urging force of the second elastic member in the direction of the operation handle A second slide member that is slidable in the direction of the operation handle by the biasing force of the second elastic member and is released by the slide of all the first slide members, and interlocked with the slide of the second slide member The lock is released from the state in which the operation handle is locked in the off position, and the wire connection confirmation mechanism is configured with a lock member that projects from the upper surface of the case.

  A circuit breaker according to a first embodiment of the present invention will be described with reference to the accompanying drawings in FIGS.

  The circuit breaker 1 is provided with an operation handle 3 on the upper surface of the case 2, a quick connection terminal 5 for inserting and connecting the electric wire 4 on one side of both right and left ends of the case 2, and the other end of the case 2. A plug-in terminal 6 for connecting a conductive bar (not shown) is provided at the part, the quick-connect terminal 5 and the plug-in terminal 6 are connected by an electric circuit 7, and an opening / closing contact 8 is provided in the middle of the electric circuit 7. It has been. The switching contact 8 is opened by the operation of the tripping mechanism 10 via the opening / closing mechanism 9 when the electric circuit 7 is abnormal, and can be opened / closed by operating the operation handle 3.

  One end of the case 2 where the quick connection terminal 5 is provided is formed on an inclined surface, and one neutral electrode fast connection terminal 5a and two voltage electrode fast connection terminals 5b and 5c are formed in the vertical direction of the inclined surface. The wire insertion holes 11 of the quick connection terminals 5 having a total of 3 poles are provided at a predetermined interval, and a metal terminal seat 12 electrically connected to the electric circuit 7 is provided inside the wire insertion holes 11. A locking spring 13 comprising a pressing piece 13 a that presses the electric wire 4 against the terminal seat 12 and a locking piece 13 b that locks the electric wire 4 is accommodated in the terminal seat 12, thereby constituting the quick connection terminal 5. A release lever 14 for releasing the lock of the electric wire 4 by the lock spring 13 is provided on the upper surface of the case 2, and the lock piece 13 b of the lock spring 13 is pushed down by the operation of the release lever 14. A release bar 15 is connected to the release lever 14 so as to release the lock.

  The quick connection terminal 5 is provided with a wire connection confirmation mechanism 16. The wire connection confirmation mechanism 16 includes a contact piece 17a that is pushed by the tip of the electric wire 4 when the electric wire 4 is inserted and connected to the electric wire insertion hole 11, and a guide piece 17b that serves as a guide when sliding in the electric wire insertion direction. A first slide member 17 formed in a substantially L shape, a first elastic member 18 that urges the first slide member 17 in a direction opposite to the electric wire insertion direction, and a contact piece of the first slide member 17 A locking portion 19a that locks 17a is formed, and is arranged so as to be substantially orthogonal to the first slide member 17. The sliding of the first slide member 17 releases the locking of the contact piece 17a and the locking portion 19a. A long plate-like second slide member 19 slidably provided in the direction of the operation handle, a second elastic member 20 that urges the second slide member 19 in the direction of the operation handle, and an operation handle of the second slide member 19 Direction slur It consists in the locking member 21 to unlock the operating handle 3 in conjunction from the state of being locked in the off position to de. When the operation handle 3 is locked, the lock member 21 is substantially flush with the top surface of the case 2. When the operation handle 3 is unlocked, the lock member 21 projects from the top surface of the case 2 so that the lock member 21 is locked. It is supposed to be displayed. As the first elastic member 18 and the second elastic member 20, a plate spring or a rubber material is used in addition to a coil spring.

  Connection of the electric wire 4 to the quick connection terminal 5 is performed by inserting the electric wire 4 having a predetermined amount of coating from the tip into the electric wire insertion hole 11. When the electric wire 4 inserted into the electric wire insertion hole 11 passes over the locking piece 13b and the pressing piece 13a of the locking spring 13 in this order and comes into contact with the abutting piece 17a of the first slide member 17, the first electric wire 4 is inserted. The first end of the electric wire 4 pushes against the abutting piece 17a of the first slide member 17 against the urging force of the elastic member 18, and the guide piece 17b of the first slide member 17 is formed on the inner surface of the case 2. When the first slide member 17 slides along the one guide groove 22, the locking of the pressing piece 17 a of the first slide member 17 and the locking portion 19 a of the second slide member 19 is released. When a predetermined amount of the electric wire 4 is inserted into the electric wire insertion hole 11, the contact piece 17a of the first slide member 17 hits the wall formed on the case 2 so that the electric wire 4 cannot be pushed in, and it can be seen that the connection of the electric wire 4 is completed. It has become. The electric wire 4 is locked so that the locking piece 13b of the locking spring 13 does not bite into the electric wire 4 and pulled out, and the pressing piece 13b presses the electric wire 4 against the terminal seat 12 so that the electric wire 4 is connected to the quick connection terminal 5 Connected to. When the connection of the electric wire 4 is completed to all three quick connection terminals and the locking of the three contact pieces 17a and the locking portion 19a is released, the second slide member 19 is biased by the urging force of the second elastic member 20. Slides in the direction of the operation handle along the second guide groove formed on the inner surface of the case 2. When the second slide member 19 slides upward, the lock member 21 is pushed up, and the lock of the operation handle 3 by the lock member 21 is released, so that the operation handle 3 can be turned on. Thus, the operation handle 3 is unlocked, and the lock member 21 projects from the upper surface of the case 2 so that it can be confirmed that the connection of the electric wire 4 to the quick connection terminal 5 is completed. Since the heat generation due to the incomplete use can be prevented, the safety is improved.

  To pull out the electric wire 4 from the quick connection terminal 5, the tip of the release lever 14 provided at the upper part of the case 2 is pulled up. When the tip of the release lever 14 is pulled up, the release lever 14 rotates about the axis, and the other end of the release lever 14 pushes down the release bar 15. The release bar 15 bends the locking piece 13b of the locking spring 13 of the quick connection terminal 5 to release the connection of the electric wire 4, so that the electric wire 4 can be removed.

  When even one wire 4 is pulled out, the first slide member 17 is pushed out by the urging force of the first elastic member 18, and the inclined surface of the contact piece 17 a of the first slide member 17 is the locking portion of the second slide member 19. The inclined surface 19a is pressed to push down the second slide member 19 against the urging force of the second elastic member 20, and the contact piece 17a of the first slide member 17 and the locking portion 19a of the second slide member 19 are It is held in a locked state. When the second slide member 19 moves downward, the lock member 21 is also pulled down, indicating that the front end of the lock member 21 is substantially flush with the upper surface of the case 2 and locked.

  A circuit breaker according to a second embodiment of the present invention will be described with reference to the accompanying drawings of FIGS. In addition, the same part as Example 1 attaches | subjects the same code | symbol, and abbreviate | omits description.

  The circuit breaker of Example 1 was used by connecting electric wires to all of the three-pole fast connection terminals. However, in the circuit breaker of this example, among the three-pole fast connection terminals, any two-pole fast connection terminals are used. The case where an electric wire is connected to and used will be described.

  The circuit breaker 1 is provided with a blind cover 24 slidably provided on the end surface of the case 2 so as to cover any one of the electric wire insertion holes 11 of the three-pole quick connection terminals 5. It has been.

  Further, the tip of the guide piece 17b of the first slide member 17 is provided so as to protrude from the vicinity of the electric wire insertion hole 11 of the case 2, and the protrusion 17c is formed so as to be inclined in the sliding direction of the blind cover 24. .

  Thereby, when connecting the electric wire 4 to arbitrary two-pole quick connection terminals 5 among the three-pole quick connection terminals 5, the electric wire insertion holes 11 of the quick connection terminals 5 of the pole not connected to the electric wires 4 are blocked. Since the blind cover 24 pushes the front end of the first slide member 17 into the case 2 by sliding the blind cover 24 inward, the locking portion 19a between the contact piece 17a of the first slide member 17 and the second slide member 19 is inserted. Is unlocked.

  For this reason, when the electric wire 4 is inserted and connected to the electric wire insertion hole 11 of the two-pole quick-connection terminal 5 that is not blocked by the blind cover 24, the contact pieces 17a of the remaining two first slide members 17 are connected. And the locking portion 19a of the second slide member 19 are also released, and the locking of all the three contact pieces 17a and the locking portion 19a is released. 2 The slide member 19 slides in the direction of the operation handle, the lock member 21 is pushed up, the lock of the operation handle 3 is released, the operation handle 3 can be turned on, and the tip of the lock member 21 protrudes from the case 2 4 is completed.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of the state before showing the circuit breaker which concerns on Example 1 of this invention, and connecting an electric wire to a quick connection terminal. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of the state which showed the circuit breaker which concerns on Example 1 of this invention, and connected the electric wire to the quick connection terminal. It is sectional drawing of the state before showing the circuit breaker which concerns on Example 2 of this invention, and connecting an electric wire to a quick connection terminal. It is sectional drawing which shows the circuit breaker which concerns on Example 2 of this invention, and showed the state which connected the electric wire to the quick connection terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Circuit breaker 2 Case 3 Operation handle 4 Electric wire 5 Fast connection terminal 6 Plug-in terminal 7 Electric path 8 Opening / closing contact 9 Opening / closing mechanism part 10 Tripping mechanism 11 Electric wire insertion hole 12 Terminal seat 13 Locking spring 13a Pressing piece 13b Locking piece DESCRIPTION OF SYMBOLS 14 Release lever 15 Release bar 16 Electric wire connection confirmation mechanism 17 1st slide member 17a Contact piece 17b Guide piece 18 1st elastic member 19 2nd slide member 19a Locking part 20 2nd elastic member 21 Lock member 22 1st guide groove 23 Second guide groove 24 Blind cover

Claims (2)

  In a circuit breaker in which an operation handle is provided on the upper surface of the case, and a plurality of quick connection terminals for inserting and connecting electric wires to one side of both right and left ends of the case, the electric wire is inserted into the electric wire insertion hole of the quick connection terminal. The first slide member that slides in the wire insertion direction against the biasing force of the first elastic member that is pushed by the tip of the wire and biases in the direction opposite to the wire insertion direction when connecting and inserting And is arranged so as to be substantially orthogonal to the first slide member, and is slidable by being urged by the urging force of the second elastic member in the direction of the operation handle. The second slide member that is unlocked by sliding of the slide member and slides in the direction of the operation handle by the biasing force of the second elastic member, and the operation handle is turned off in conjunction with the slide of the second slide member Unlock the lock state, the circuit breaker characterized by comprising a wire connection confirmation mechanism consisting of a locking member for displaying protruding from the upper surface of the case.   The circuit breaker has a three-pole quick-connect terminal in the vertical direction of the end surface on one side of the case, and any one of the quick-connect terminals of the three-pole quick-connect terminals can be arbitrarily selected. A blind cover is provided so as to be slidable along an end surface of the case, and the first slide member is provided so as to protrude from a surface provided with the wire insertion hole of the case, and the blind cover is slid. When the wire insertion hole of any one of the quick connection terminals is covered, the protruding portion of the first slide member is pushed into the case to release the locking with the second slide member. The circuit breaker according to claim 1.

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