JP5489347B2 - Circuit breaker - Google Patents

Description

  The present invention relates to a circuit breaker provided with a release lever for releasing an electric wire connected to a quick connection terminal.

  Conventionally, a quick connection terminal that can be connected by simply inserting an electric wire into a load-side terminal of a circuit breaker has been used. The quick connection terminal is composed of a quick connection spring and a terminal plate. By inserting the stripped wire into the wire connection hole of the circuit breaker case, the quick connection spring is a plate-like lock that is tilted in the direction of inserting the wire. While the piece bites into the electric wire to prevent the electric wire from coming off, the S-shaped pressing piece presses the electric wire against the terminal plate and is electrically connected. Thus, the quick connection terminal can be easily connected by simply inserting the electric wire into the electric wire connection hole. Moreover, when releasing the connected electric wire, the electric wire can be pulled out by operating the release lever of the circuit breaker to release the engagement of the lock spring. The release lever protrudes horizontally from the upper surface of the circuit breaker case with respect to the upper surface of the case and is pivotally supported. Lifting the release lever with your finger and turning it upward causes the tripping plate linked to the release lever to move faster. The lock piece of the binding spring is pushed down, the engagement of the lock piece to the electric wire is released, and the electric wire is pulled out from the electric wire connection hole. In order to reduce the thickness of the circuit breaker, the present applicant has proposed a circuit breaker in which a plurality of quick connection terminals are arranged in one row in the upper and lower rows so that the engagement of the plurality of quick connection terminals can be released with one release lever. (For example, refer to Patent Document 1).

Japanese Patent Laying-Open No. 2007-149484 (FIGS. 1 and 2)

  In this way, the structure in which the engagement of the plurality of quick connection terminals with one release lever is released at a time requires that the locking pieces of the plurality of locking springs be simultaneously pushed down and displaced, so that force is exerted on the operation of the release lever. Necessary. However, the circuit breaker has a thin circuit breaker case, and the width of the release lever is reduced so that the wire connection hole can be seen from the top surface of the circuit breaker case that has an operation handle at the front when the wire is connected. As a result, the burden on the finger is large when operating the release lever, and the operability is not very good.

According to the invention described in claim 1, and quick connect terminals for connecting the electric wire, the circuit breaker having a release lever for releasing the connection of the wires in the velocity imaging terminal, the release lever, the release Auxiliary member consisting of a mounting part with an insertion hole to be inserted into the lever and a knob part formed integrally with the mounting part can be attached and operated, and a concave groove is formed on the side of the release lever, facing the concave groove In addition to forming protrusions in the insertion holes of the auxiliary member, a positioning mark is provided on the front surface of the auxiliary member to indicate the position of the insertion hole, and the auxiliary member is attached to a mounting panel for mounting the circuit breaker. It is possible to hold it.

According to the first aspect of the present invention, the simple structure can be formed at low cost, and the release lever can be operated with a small force, and the lower surface of the release lever is curved in an arc shape. Even if the auxiliary member is formed to form an acute angle with respect to the upper surface of the release lever, the auxiliary member can be engaged with the release lever securely and force is applied in the release direction when operating the auxiliary member. Since the member is detached from the release lever and the position of the insertion hole is known, there is an effect that the auxiliary member can be easily attached to the release lever .

1 is a perspective view showing a circuit breaker according to the present invention. It is the front view of the state where the distribution board which stored the circuit breaker concerning the present invention was shown, and the front cover was removed. It is a perspective view which shows an auxiliary member. An auxiliary member is shown, (a) is a front view, (b) is a plan view, and (c) is a left side view. It is the sectional view on the AA line of FIG. The usage method of an auxiliary member is shown, (a) is a perspective view of a mode that an auxiliary member is attached to a cancellation | release lever, (b) is a perspective view which shows a mode that a cancellation | release lever is operated with an auxiliary member. It is sectional drawing which shows the state which attached the auxiliary member to the cancellation | release lever. It is sectional drawing of the attachment panel which shows the state which attached the auxiliary member to the attachment panel. It is a front view of the electricity distribution panel which shows the state which attached the auxiliary member to the attachment panel.

  The circuit breaker can be operated by attaching an auxiliary member to a release lever for releasing the electric wire connected to the quick connection terminal. The auxiliary member is composed of a mounting part having an insertion hole to be inserted into the release lever, a knob part formed integrally with the mounting part, and a locking part for holding on the mounting panel of the distribution board when not in use. To do. Also, a concave groove is formed on the side surface of the release lever, and a protrusion is formed in the insertion hole of the auxiliary member so that the release lever is not removed when the release lever is operated using the auxiliary member. The auxiliary member is provided with an alignment mark for displaying the position of the insertion hole so that the auxiliary member can be easily attached to the release lever.

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

  The circuit breaker 1 is provided with an operation handle 3 that opens and closes an electric circuit on the upper surface of the circuit breaker case 2, and a power supply side terminal 4 is provided on one surface in the longitudinal direction of the circuit breaker case 2. The load side terminal 5 is provided on the other side of the. The circuit breaker 1 is used as a branch breaker of the single-phase three-wire distribution board 6, and the power source side terminal 4 and the load side terminal 5 are respectively configured to form two voltage poles and one neutral pole circuit. There are poles. The load side terminal 5 is a quick connection terminal 5 that can be connected by simply inserting the stripped electric wire into the electric wire connection hole 7 of the circuit breaker case 2, and the quick connection terminal 5 has the electric wire connection holes 7 arranged in one row in the upper and lower sides. Yes. Of the three-pole quick-connect terminals 5, a slide cover 8 is provided in the circuit breaker case 2 in order to connect the electric wires to the two-pole fast-connect terminals 5 and use any one of the wire connection holes 7. The pole is blocked.

  Further, in order to release the electric wire connected to the quick connection terminal 5, a release lever 9 is pivotally supported from the circuit breaker case 2 so as to project horizontally from the upper surface end of the circuit breaker case 2. The release lever 9 is connected to the width direction edge of the surface having the wire connection hole 7 and the end of the wire connection hole 7 so that the wire connection hole 7 can be seen from the upper surface direction of the circuit breaker case 2 having the operation handle 3 which is the front when the wire is connected. The width between the edges is formed, the upper surface is formed in parallel with the upper surface of the circuit breaker case 2, and the lower surface is formed at an acute angle with respect to the upper surface. The release lever 9 is structured to release the engagement of the quick connection terminal 5 by rotating upward.

  And when releasing the electric wire connected to the circuit breaker 1, the auxiliary member 10 is attached and operated so that the release lever 9 can be operated with a small force. The auxiliary member 10 has a mounting portion 10b having an insertion hole 10a to be inserted into the release lever 9, a knob portion 10c formed integrally with the mounting portion 10b, and a mounting panel for the distribution board 6 for mounting the circuit breaker 1. 11 is formed with a locking portion 10d for holding it when not in use. Further, the release lever 9 is formed on the side surface with a concave groove 9a parallel to the upper surface of the release lever 9, and the insertion hole 10a of the auxiliary member 10 is formed with a ridge 10e facing the concave groove 9a. Further, the auxiliary member 10 is provided with an alignment mark 10f so that the release lever 9 and the insertion hole 10a can be easily aligned. The alignment mark 10f includes a groove 10fa formed in the knob portion 10c so as to coincide with the insertion direction of the insertion hole 10a, and a notch 10fb formed continuously at the tip of the knob portion 10c in the groove 10fa. . The locking portion 10d has an L-shaped locking claw 10g that locks to one side in the longitudinal direction of the rectangular hole 11a formed in the mounting panel 11, and a latch that locks to the other side in the longitudinal direction of the rectangular hole 11a. The locking protrusion 10h is formed on a locking piece 10i formed to be elastically deformable.

  In order to attach the auxiliary member 10 thus formed to the release lever 9, the alignment mark 10 f of the auxiliary member 10 is aligned with the release lever 9, and the auxiliary member 10 is pushed into the release lever 9 so that the release lever 9 It can be attached by being inserted into the insertion hole 10a. Then, the release lever 9 is operated by lifting the auxiliary member 10 and turning it upward. At this time, since the protrusion 10e of the auxiliary member 10 is engaged with the concave groove 9a of the release lever 9, the auxiliary member 10 is not easily detached from the release lever 9 during the operation.

  When the auxiliary member 10 is not used, the auxiliary member 10 is held on the mounting panel 11 to which the circuit breaker 1 is mounted. The attachment to the attachment panel 11 is performed by engaging the engagement claw 10g of the engagement portion 10d with one side in the longitudinal direction of the rectangular hole 11a of the attachment panel 11 and then pressing the engagement piece 10i against the attachment panel 11. It can be attached by locking the locking protrusion 10h of the stop piece 10i to the other side in the longitudinal direction of the rectangular hole 11a.

1 Circuit breaker 5 Load side terminal (fast connection terminal)
DESCRIPTION OF SYMBOLS 9 Release lever 9a Groove | groove 10 Auxiliary member 10a Insertion hole 10b Mounting part 10c Knob part 10d Locking part 10e Projection strip 10f Alignment mark 10fa Groove 10fb Notch 10g Locking claw 10h Locking protrusion 10i Locking piece 11 Mounting panel 11a Rectangular hole

Claims (1)

In a circuit breaker having a quick connection terminal for connecting an electric wire and a release lever for releasing the connection of the electric wire of the quick connection terminal, the release lever has an insertion hole to be inserted into the release lever An auxiliary member composed of an attachment portion and a knob portion formed integrally with the attachment portion is attached to be operable , a concave groove is formed on a side surface of the release lever, and the auxiliary member is opposed to the concave groove. A protrusion is formed in the insertion hole, and an alignment mark for displaying the position of the insertion hole is provided on the front surface of the auxiliary member, and the auxiliary member is held on a mounting panel for attaching the circuit breaker. Circuit breaker characterized by being able to do .

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