JP4813956B2 - Circuit breaker terminal structure - Google Patents

Description

  The present invention relates to a terminal structure of a circuit breaker, and more particularly, to a terminal structure of a circuit breaker including a connection display mechanism that includes a quick-connect terminal and displays a connection state of an inserted electric wire.

  In the case of a circuit breaker equipped with a quick connection terminal that is connected by simply inserting the wire, it is difficult to check whether the electric wire inserted from the terminal port is connected to the quick connection terminal by simply pulling it. Is provided so that the operator can easily recognize whether or not the amount of insertion of the electric wire is sufficient. This connection display mechanism is configured as shown in Patent Document 1, for example, and includes a rotation fulcrum at the bottom, an interference unit where the tip of the wire interferes in the middle, and a display operation unit that displays the connection state at the upper end. The moving display member is arranged in the circuit breaker case, and the insertion state of the electric wire inserted in the quick connection terminal is visible from above the circuit breaker case.

  On the other hand, since the circuit breaker is housed in a limited space in the distribution board, the size of the circuit breaker has been reduced. For example, a circuit breaker having a structure as shown in Patent Document 2 has been proposed. In this case, when the operation lever arrangement portion is the upper surface of the circuit breaker case, a plurality of terminals of the power supply side terminal and the load side terminal are arranged vertically to make the width of the circuit breaker case thinner.

JP 2005-353380 A JP 2002-216610 A

However, when the quick connection terminals are arranged vertically as shown in Patent Document 2, the connection display mechanisms as described above are arranged vertically in the circuit breaker case. Resulting in. Further, if the connection display mechanisms are arranged side by side to avoid interference, the width cannot be reduced.
Therefore, in view of such a problem, the present invention provides a circuit breaker having a structure in which the quick connection terminals are vertically arranged, with respect to the individual quick connection terminals without obstructing the thinning of the circuit breaker case. An object of the present invention is to provide a terminal structure of a circuit breaker that can include a connection display mechanism.

In order to solve the above-mentioned problems, the invention of claim 1 is a terminal structure of a circuit breaker provided with a connection display mechanism for displaying a fast connection terminal and an insertion state of an electric wire connected to the fast connection terminal, The connection display mechanism includes a sliding member that is arranged in parallel with the quick-connect terminal and can be moved back and forth in the electric wire insertion direction, and is arranged in the vicinity of the terminal port so that the base of the sliding member engages to move the sliding member. The display member that is rotated by the position and the elastic member that urges the sliding member toward the terminal port, while the display member is visible on the terminal port forming surface of the circuit breaker case adjacent to the terminal port. A check window is provided, and a contact piece is provided at the tip of the sliding member to contact the tip of the electric wire inserted into the quick-connect terminal, and the sliding member moves forward inward of the terminal by the contact of the electric wire. It is characterized by that.
With this configuration, the sliding member moves in the electric wire insertion direction by the electric wire inserted into the quick connection terminal, and the display member rotates. As a result, the wire insertion state can be confirmed through the confirmation window by this turning state. The connection display mechanism is arranged side by side with the quick connection terminals, and the sliding member only moves in the longitudinal direction of itself, so the moving space is also small, and a plurality of quick connection terminals are arranged vertically. However, the connection display mechanisms assembled to the individual quick connection terminals do not interfere with each other. Moreover, there is no such thing as obstructing the thinning of the circuit breaker case width.

The invention according to claim 2 is the invention according to claim 1, wherein the display member is formed in a substantially disk shape, and the display member housing portion of the circuit breaker case has a circular shape that matches the curvature of the display member, A sliding member is connected to an eccentric part of the display member, and the display member is rotated by a back-and-forth movement of the sliding member.
With this configuration, the display member can be rotated without providing a rotation shaft, the structure of the connection display mechanism can be simplified, and the assembly can be facilitated.

The invention according to claim 3 is the circuit breaker according to claim 1 or 2, wherein the operation lever is arranged on the upper surface of the circuit breaker case, and the load side terminals composed of a plurality of quick connection terminals are arranged vertically on one side surface. In this case, the connection display mechanism is arranged in parallel on the upper side of the individual quick connection terminals, and the display member rotates about the vertical axis.
With this configuration, a confirmation window is provided on the upper side of the terminal port, so that it is easy to confirm the connection state when the electric wire is connected. Further, since the display member rotates in a substantially horizontal plane, the installation space for the connection display mechanism is small, and the connection display mechanism does not become an obstacle when the quick connection terminals are arranged vertically adjacent to each other. .

  According to the present invention, the sliding member moves in the electric wire insertion direction and the display member rotates by the electric wire inserted into the quick connection terminal, so that the electric wire insertion state can be confirmed through the confirmation window. The connection display mechanism is arranged side by side with the quick connection terminals, and the sliding member only moves in the longitudinal direction of itself, so the moving space is also small, and a plurality of quick connection terminals are arranged vertically. However, the connection display mechanisms assembled to the individual quick connection terminals do not interfere with each other. Moreover, there is no such thing as obstructing the thinning of the circuit breaker case width.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. 1 to 3 show an example of the present invention, FIG. 1 is a cross-sectional explanatory view of a circuit breaker, FIG. 2 is an external view thereof, and FIG. 3 is a side view. In each figure, 1 is a circuit breaker case incorporating a circuit breaker circuit breaker mechanism, 2 is a power supply side terminal provided on the back of the circuit breaker case, 3 is a load side terminal provided on the front of the circuit breaker case, and 4 is a circuit breaker. An operation handle for turning on / off the circuit breaker output provided on the upper surface of the breaker case, 5 is an inspection hole used for insulation resistance measurement, etc. 6 is a confirmation for confirming the insertion state of the electric wire inserted in the load side terminal 3 A window 7 is a connection display mechanism for displaying an inserted state of the inserted electric wire in the confirmation window 6, and 10 is an electric wire connected to the load side terminal 3. In the circuit breaker case 1, an overcurrent interrupting mechanism (not shown) that operates to interrupt when an overpower occurs is incorporated.

This circuit breaker is formed so as to correspond to a single-phase three-wire electric circuit, and both the power-side terminal 2 and the load-side terminal 3 are composed of three terminals arranged vertically. The front surface provided with the load-side terminal 3 is formed so as to be inclined upward so that the individual terminals can be easily seen.
As shown in FIG. 1, the power supply side terminal 2 is formed by a plug-in type terminal that sandwiches and connects a copper bar (not shown), and the load side terminal 3 is a fast connection that connects by simply inserting the electric wire 10. The terminal 11 is formed. Further, the load side terminal 3 has a circular terminal port 3a, and the quick connection terminal 11 is disposed in the back of the terminal port 3a.

  Further, the power supply side terminal 2 is arranged with the neutral terminal at the top and the two terminals at the bottom as the voltage terminal, and the load side terminal 3 is arranged with the neutral terminal at the center and the upper and lower terminals as voltage terminals. With this arrangement, an output of 100V voltage can be obtained by connecting the electric wire 10 to the center terminal of the load side terminal 3 and one of the upper terminal or the lower terminal, and the electric wire 10 is connected to the upper and lower terminals. By doing so, an output of 200V voltage can be obtained.

4 is an enlarged view of part A of FIG. 1, and FIG. 5 is a cross-sectional view taken along the line BB. As shown in this figure, each quick connection terminal 11 has a connection display mechanism 7 disposed adjacent to the upper side. Yes. The quick connection terminal 11 is electrically connected to the inserted electric wire 10 and also has a locking fitting 12 which is locked to the inserted electric wire and has a retaining action, and a terminal fitting connected to a switching contact (not shown). 13.
And the connection display mechanism 7 has the contact piece 16a with which the front-end | tip of the electric wire 10 contact | abuts, the sliding member 16 arrange | positioned so that sliding in an electric wire insertion direction and the sliding member 16 are engaged, and it confirms. The display member 17 is partially exposed to the window 6, and the coil spring 18 is an elastic member that returns the sliding member 16 moved by pressing the electric wire 10.

  Each member of the connection display mechanism has a shape as shown in the exploded perspective view of FIG. The sliding member 16 has a rod body 16b disposed along the quick connection terminal 11, and the abutting piece 16a is disposed at the tip thereof and is formed in a substantially L shape as a whole. A protrusion 16c for connecting to the display member 17 is provided at the base of the rod 16b, and a notch for arranging the coil spring 18 is provided at the side. A support protrusion 16d for supporting the coil spring 18 is provided on the notch display member 17 connection side.

  On the other hand, the display member 17 has a shape in which a part of the disk is cut out, and is provided with a through hole 17a for inserting the protrusion 16c of the sliding member 16 at an eccentric portion. The display member 17 is configured to rotate. A side surface 17 b formed of a curved surface is a display surface exposed from the confirmation window 6.

  The connection display mechanism 7 formed in this way is accommodated in the circuit breaker case 1 as shown in FIG. 5, and a coil spring 18 is disposed between the support piece 20 protruding from the circuit breaker case 1 and the sliding member 16. The Thus, the sliding member 16 is always urged in the direction of the terminal port 3a, and a space in which the sliding member 16 can move is formed in the circuit breaker case 1 in front of the sliding member 16. Further, the display member 17 is accommodated in the accommodating portion 21 formed in a substantially circular shape with the same curvature, can convert the linear movement of the sliding member 16 into a favorable rotation operation, and is in a substantially horizontal plane around the longitudinal axis. It is configured to rotate at.

  As shown in FIG. 4, when the inserted electric wire 10 reaches the back of the quick connection terminal 11, it comes into contact with the contact piece 16 a of the sliding member 16, and further inserted, the sliding member 16 becomes a coil spring 18. It moves according to the insertion amount of the electric wire 10 against the urging force. The display member 17 rotates according to the amount of movement. At this time, if a part of the side surface 17b of the display member 17 is added, it becomes easy to visually recognize the wire insertion state through the confirmation window 6 due to the color change, and the operator can easily grasp the insertion amount. .

Thus, the sliding member moves in the electric wire insertion direction by the electric wire inserted into the quick connection terminal, and the display member rotates. As a result, the wire insertion state can be confirmed through the confirmation window by this turning state. The connection display mechanism is arranged side by side with the quick connection terminals, and the sliding member only moves in the longitudinal direction of itself, so the moving space is also small, and a plurality of quick connection terminals are arranged vertically. However, the connection display mechanisms assembled to the individual quick connection terminals do not interfere with each other. Moreover, there is no such thing as obstructing the thinning of the circuit breaker case width.
In addition, the display member is formed in a disc shape, the display member receiving portion of the circuit breaker case has a circular shape that matches the curvature of the display member, and the sliding member is connected to the eccentric part of the display member. It is possible to rotate the display member without providing the connection member, the structure of the connection display mechanism can be simplified, and the assembly is facilitated.
Furthermore, since a confirmation window is provided on the upper side of the terminal port, it is easy to confirm the connection state when the electric wire is connected. Further, since the display member rotates in a substantially horizontal plane, the installation space for the connection display mechanism is small, and the connection display mechanism does not become an obstacle when the quick connection terminals are arranged vertically adjacent to each other. .

In addition, although the said embodiment has shown the structure which has arrange | positioned each terminal of the load side terminal 3 which consists of the quick connection terminal 11 vertically, the terminal structure of this invention is a structure which arranged a pair of conventional terminal horizontally. Even if it exists, it can apply easily and can provide a connection display mechanism in space-saving.
Moreover, although the display member is configured to be rotatable without having a rotation shaft, it is of course possible to provide a rotation shaft and pivotally support the circuit breaker case, so that a favorable rotation operation can be obtained.

It is a section explanatory view showing an example of an embodiment of the present invention and showing a terminal structure of a circuit breaker. It is a perspective view of the circuit breaker of FIG. It is a side view of the circuit breaker of FIG. It is an A section enlarged view. It is a BB sectional view. It is a disassembled perspective view of a connection display mechanism.

Explanation of symbols

  1 ... Circuit breaker case 2 ... Power supply side terminal 3 ... Load side terminal 3a ... Terminal port 4 ... Operation lever 6 ... Confirmation window 7 ... Connection display mechanism 10 ... Electric wire , 11 ··· Fast connection terminal, 16 ·· Sliding member, 17 ··· Display member.

Claims (3)

It is a terminal structure of a circuit breaker provided with a quick connection terminal and a connection display mechanism for displaying an insertion state of an electric wire connected to the quick connection terminal,
The connection display mechanism includes a sliding member that is arranged in parallel with the quick-connect terminal and can be moved back and forth in the electric wire insertion direction, and is arranged in the vicinity of the terminal port so that the base of the sliding member engages to move the sliding member. The display member that is rotated by the position and the elastic member that urges the sliding member toward the terminal port, while the display member is visible on the terminal port forming surface of the circuit breaker case adjacent to the terminal port. With a confirmation window,
The sliding member is provided with an abutting piece with which the tip of the electric wire inserted into the quick connection terminal comes into contact, and the sliding member moves forward in the direction of the terminal by the contact of the electric wire. Circuit breaker terminal structure. The display member is formed in a substantially disk shape, and the display member housing portion of the circuit breaker case has a circular shape that matches the curvature of the display member, and a sliding member is connected to the eccentric part of the display member, and the sliding member The circuit breaker terminal structure according to claim 1, wherein the display member is pivoted by the back-and-forth movement. In a circuit breaker in which an operation lever is arranged on the top surface of the circuit breaker case and a load side terminal consisting of a plurality of quick connection terminals is vertically arranged on one side, the connection display mechanism is arranged above each of the quick connection terminals. The circuit breaker terminal structure according to claim 1, wherein the display member is rotated about a longitudinal axis.

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