JP4938343B2 - Circuit breaker - Google Patents

Description

  The present invention has an operation handle for opening and closing an electric circuit on the upper surface of the case, and a power supply side terminal is provided on one surface of the case and a load side terminal is provided on the other surface, and an abnormal current flows through the electric circuit. It is related with the circuit breaker which interrupts | blocks an electric circuit at the time.

  Conventionally, as a circuit breaker connected to an electric circuit composed of a plurality of copper bars so that different voltages can be taken out from a power source such as a single-phase three-wire, it has been described in Patent Documents 1 to 4 Things are known. In these circuit breakers of Patent Documents 1 to 4, plug-in terminals on the power supply side provided on one side of the case are connected to a plurality of copper bars to be connected, and on the load side provided on the other side. The screw terminal and the quick connection terminal are configured to be connected to the load wire. In addition, for example, in the case of a single-phase three-wire power supply, the voltage switching of 100 V / 200 V taken out from the electric circuit is performed by the person in charge of installation when the circuit breaker is attached to the distribution board. It is configured to operate by operating the switching means of the mold terminal.

  However, since the techniques of Patent Documents 1 to 4 are provided with switching means inside the circuit breaker, there is a problem in that the outer dimensions are increased and the internal structure is complicated. In addition, when switching the voltage, it is necessary to remove the circuit breaker to be switched, open the case, and perform the switching operation, which is problematic in that the workability is poor and troublesome.

  In order to solve the above problem, a circuit breaker has been devised in which the configuration corresponding to the switching means of Patent Documents 1 to 4 can be omitted. This is because, for example, when connected to a single-phase three-wire power source, the load side terminal is set in advance so that different voltages of 100 V / 200 V can be output via the power source side terminal connected to the three copper bars. Three are provided. According to this circuit breaker, it is possible to reduce the outer dimensions and simplify the internal structure by omitting the switching means.

JP 2003-208443 A JP 2003-217432 A JP 2004-087240 A JP 2006-032319 A

  However, since this circuit breaker includes a plurality of load-side terminals that can output different voltages, there is a problem in that a possibility of erroneous connection is high.

  Therefore, in view of the above problems, an object of the present invention is to provide a circuit breaker that can prevent erroneous connection even when a plurality of load-side terminals capable of outputting different voltages are provided.

In order to solve the above problems, a circuit breaker according to the invention of claim 1 is provided with an operation handle for opening and closing an electric circuit provided on the upper surface of the case, a plurality of power supply side terminals provided on one surface, and a second surface. A plurality of load side terminals, each of the load side terminals having a quick connection terminal for connecting the electric wires to the back of the terminal hole into which the electric wires are inserted , wherein the load side terminals are , are arranged in a row along the longitudinal direction of the other surface which is a rectangular, comprises a sealing cover covering the load-side terminals selected, the sealing cover, the insertion portion inserted into the terminal hole When, it comprises a stopper portion to which the inserting portion with respect to the terminal holes formed continuously in the insertion portion is prevented so as not to be inserted over a predetermined depth, wherein the stopper portion is of the other surface A short side shorter than the length in the short direction, and -Option and said load side terminal and a length that does not cover the load-side terminals of adjacent is formed in a rectangular plate shape made of a long side to the other surface provided with said load-side terminals, the stopper portion It is configured to be provided with a locking portion that locks the long side end portions on both sides so as to be pressed from the outside and prevents the insertion portion inserted into the terminal hole .

Circuit breaker according to the invention of claim 2, when the case is a pair of divided bodies divided into left and right locking portions provided on both of the divided body of a pair, assembled cases, locking It is comprised so that a stopper part may be latched by a part.

  The circuit breaker according to the invention of claim 3 is provided with three load side terminals, one of the three load side terminals is covered with a sealing cover, and an electric wire is connected to the remaining two load side terminals. It is comprised so that it may become.

  According to the first to third aspects of the invention, even when a plurality of load-side terminals that can output different voltages are provided, the load-side terminals that are not used in advance are covered with a sealing cover to prevent erroneous connection, An electric wire can be connected to the load side terminal that outputs an appropriate voltage. In addition, since the stopper part of the sealing cover is locked by the locking part, the selected cover on the load side can be securely connected with the sealing cover without dropping the sealing cover no matter what angle the circuit breaker is attached to the wall surface. Can be coated. Further, since the sealing cover is attached to the outside of the case, the voltage switching operation can be performed without removing the circuit breaker from the distribution board, and workability can be improved. Further, since the conventional voltage switching means is omitted, the outer diameter of the circuit breaker can be reduced. Moreover, if the arrangement of the power supply side terminals is standardized in accordance with the arrangement dimensions of the copper bars, it is possible to share even those having different voltages.

  In particular, according to the invention of claim 2, when the case is assembled, the load side terminal selected by locking the stopper portion with the locking portion provided on the pair of divided bodies is covered. If so, it is possible to eliminate the possibility of the sealing cover falling off. In this way, when the circuit breaker is assembled to the distribution board, the selected load side terminal is reliably covered with the sealing cover, so that erroneous connection can be prevented with a higher probability.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. 1A and 1B show a circuit breaker according to an embodiment of the present invention. FIG. 1A is a side view, FIG. 1B is a front view, FIG. 1C is an end view taken along line AA, and FIG. is there. The circuit breaker 1 includes an operation handle 3 that opens and closes an electric circuit on the upper surface of a case 2, a power-side terminal 4 is disposed on the front surface of the case 2, and a load-side terminal 5 is disposed on the opposite rear surface. . The case 2 includes a pair of divided bodies 20 and 21 each of which is divided into left and right parts along the center line so as to include the left and right side surfaces, and the pair of divided bodies 20 and 21 are assembled. Configured.

  The circuit breaker 1 can be used in a single-phase three-wire circuit, and the power supply side terminal 4 and the load side terminal 5 are provided with three terminals each of an N pole terminal, an L1 pole terminal, and an L2 pole terminal. Yes. The load-side terminals 5 are arranged in a line along the length of the front, and when the electric wires are inserted into the terminal holes 15, the electric wires are fixed by the quick-connection springs 7 provided at the back so as to be so-called quick-connection terminals. It is configured. In addition, each power supply side terminal 4 is configured such that corresponding receiving blades 16 sandwich three copper bars (not shown) arranged on the switchboard at the same time.

  The center terminal of the load-side terminal 5 is an N-pole terminal 5a. An L1-pole terminal 5b is disposed on the upper side of the N-pole terminal 5a, and an L2-pole terminal 5c is disposed on the lower side. Further, the L1 pole terminal 5b which is the selected load side terminal 5 is covered with a sealing cover 8.

  As shown in FIG. 3, the sealing cover 8 includes an insertion portion 10 that is inserted into the terminal hole 15 of the load-side terminal 5, and an insertion portion 10 that is connected to the insertion portion 10 and has a predetermined depth with respect to the terminal hole 15. In other words, the stopper portion 11 is configured to prevent the insertion to the position where it contacts the quick coupling spring 7. The insertion portion 10 is formed in a cylindrical shape having a diameter that can be inserted into a terminal hole 15 formed in a columnar hole shape. Further, the stopper portion 11 is adjacent to the short side shorter than the short width of the front surface of the case 2 without protruding from the front surface in a state where the insertion portion 10 is inserted into the terminal hole 15 of the selected load side terminal 5. It is formed in a rectangular plate shape having a long side that does not cover the other load side terminals 5. Further, at both longitudinal end portions of the front surface of the case 2, there are provided locking portions 12 formed in an inverted L-shaped cross section that locks the long side edge portions of the stopper portion 11 from the outside.

  Further, the seal cover 8 has a load-side terminal 5 (L1 pole terminal in the case of FIG. 1) selected in a state where the decorative plate 9 is disposed at a predetermined position when the case 2 is assembled by combining the pair of divided bodies 20 and 21. 5b) The insertion part 10 is inserted into the terminal hole 15, and the long side edges of the stopper part 11 are locked from the left and right sides by the locking parts 12 provided in front of the divided bodies 20 and 21. To cover the selected load-side terminal 5.

  When a voltage of 100 V is selected, as shown in FIGS. 1A and 4A, the upper L1 pole terminal 5b or the lower L2 pole terminal 5c is covered with the sealing cover 8, and the center L2 pole terminal 5c is covered. Each electric wire is connected to the L1 pole terminal 5b or the L2 pole terminal 5c which is not covered with the N pole terminal 5a and the sealing cover 8. Further, as shown in FIG. 4B, the voltage is switched to 200V by covering the central N-pole terminal 5a with the sealing cover 8 and connecting the electric wires to the upper and lower L1-pole terminals 5b and L2-pole terminals 5c. .

  According to the circuit breaker 1, the load-side terminal 5 that is not used in advance is covered with the sealing cover 8 even if the load-side terminal 5 that can output two different types of voltages is provided. An electric wire can be connected to the load side terminal 5 which prevents erroneous connection and outputs an appropriate voltage. Since the stopper portion 11 of the sealing cover 8 is locked by the locking portion 12, the selected load side terminal 5 is not dropped without dropping the sealing cover 8 no matter what angle the circuit breaker 1 is attached to the wall surface. Can be reliably covered with the sealing cover 8. Moreover, since the sealing cover 8 is attached to the outside of the case 2, voltage switching work can be performed without removing the circuit breaker 1 from the distribution board, and workability can be improved. Further, since the conventional voltage switching means is omitted, the external dimensions of the circuit breaker 1 can be reduced. Moreover, if the arrangement of the power supply side terminals 4 is standardized in accordance with the arrangement size of the copper bar, even those having different voltages can be shared.

  In addition, when the case 2 is assembled, the stopper portion 11 is locked from the left and right with the locking portions 12 provided on the pair of divided bodies 20 and 21 so as to cover the selected load-side terminal 5. If there is, it is possible to eliminate the possibility of the sealing cover 8 falling off. As described above, when the circuit breaker 1 is assembled to the distribution board, the selected load-side terminal 5 is reliably covered with the sealing cover 8, so that erroneous connection can be prevented with a higher probability.

In addition, this invention is not limited to the said embodiment, As it enumerates below, it is also possible to implement by changing suitably the shape and structure of each part in the range which does not deviate from the meaning of this invention.
(1) The insertion portion of the sealing cover is not limited to a cylindrical shape, and may be a polygonal column such as a triangular column, or a piece that protrudes from the stopper to the back of the terminal hole.
(2) The stopper portion of the sealing cover is not limited to a rectangular shape, and may be any shape that can be locked to the locking portion. It may be a piece or projecting body projecting from the part.
(3) The load side terminals are not limited to three, and a plurality of load side terminals can be provided in accordance with different output voltages. In that case, there may be a plurality of selected load side terminals, and it is desirable to cover each with a sealing cover.
(4) The locking portion is not limited to being provided at both longitudinal ends of the surface on which the load-side terminal is provided, and may be provided at a position where the stopper portion can be locked. It may be provided only in the vicinity.
(5) The locking portion is not limited to both the left and right divided bodies, and may be provided on either one.
(6) The power supply side terminal is not limited to the back side but can be provided on the bottom side.

BRIEF DESCRIPTION OF THE DRAWINGS (a) which shows one Embodiment of the circuit breaker based on this invention is a side view, (b) is a front view, (c) is an AA line end view. It is a disassembled perspective view of the circuit breaker of FIG. It is an expansion perspective view of a sealing cover. The cover state of a sealing cover is shown, (a) is explanatory drawing at the time of 100V voltage selection, (b) is explanatory drawing at the time of 200V voltage selection.

Explanation of symbols

  1 .... Circuit breaker 2 .... Case 3 .... Operating handle 4 .... Power supply side terminal 5 .... Load side terminal 7 .... Quick coupling spring 8 .... Seal cover 9 ... Cosmetic panel 10 .. Insertion part, 11 .. Stopper part, 12 .. Locking part, 15 .. Terminal hole, 16 .. Receiving blade, 20 .. Left division body, 21 .. Right division body, 5 a. Pole terminal, 5b ·· L1 pole terminal, 5c ·· L2 pole terminal.

Claims (3)

An operation handle for opening and closing an electric circuit provided on the upper surface of the case, a plurality of power supply side terminals provided on one surface, and a plurality of load side terminals provided on the other surface, each load side terminal being a terminal into which an electric wire is inserted A circuit breaker having a quick connection terminal for connecting an electric wire to the back of the hole,
Wherein the plurality of the load-side terminal is disposed in a row along the longitudinal direction of the other surface which is a rectangular, it comprises a sealing cover covering the load-side terminals selected,
The sealing cover is closed and the insertion portion to be inserted into the terminal hole, and a stopper portion to which the insertion portion with respect to consecutively to the terminal hole to the insertion portion is prevented so as not to be inserted over a predetermined depth, the And
The stopper portion is a rectangular plate having a short side shorter than the length of the other surface in the short direction and a long side having a length that does not cover the load side terminal adjacent to the selected load side terminal. Is formed,
The surface of the other provided with the load-side terminals, the engaging portion of both side long side edges engaged as pressed from outside to retaining the insertion portion inserted into the terminal hole of the stopper portion Will be provided,
A circuit breaker characterized by that. The case is composed of a pair of divided bodies divided into left and right,
An engagement portion provided on both of the divided body of a pair,
When the case is assembled, the stopper part is locked with the locking part.
The circuit breaker according to claim 1. Three load side terminals are provided,
Cover one load-side terminal selected from the three with a sealing cover, and connect wires to the remaining two load-side terminals.
The circuit breaker according to claim 1 or 2.

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