JPH0631618Y2 - Switch handle lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] This invention relates to a handle lock device for a switch, which is mainly used for a circuit breaker such as a circuit breaker for a wiring or an earth leakage breaker, and in particular, an The present invention relates to a switch that can be easily switched in each of the "off" and "off" states to securely lock the operation handle.

[Conventional technology]

Known locking devices of this type are shown in FIGS. 5 and 6, for example. In the figure, the locking device includes a square window 1a provided in a case 1 of the circuit breaker and an operation handle 2 protruding from the square window 1a and performing a linear reciprocating rotation from the front side of the circuit breaker. It is locked in each of the "on" and "off" states of the circuit breaker, and is fitted into the operation handle 2 protruding from the square window 1a of the case 1 at both the "on" and "off" positions of the circuit breaker. The lock cover 3 includes a boss 3a capable of performing the above and a lock bar 3b integrally formed on the outside of the boss 3a. The boss 3a is provided with a square hole 3b through which the handle can be inserted when it is fitted into the boss 3a, and a projecting ridge 3c is provided on the inner wall of the boss 3a. The lock bar 3b has an edge on the entrance side of the square window 1a. Engagement portions 3e capable of engaging with 1b and the cut side edge 1c are provided. On the other hand, the operation handle 2 is provided with recesses 2a, 2a on both side surfaces perpendicular to the operation direction so as to reduce the amount of synthetic resin material.

In the above structure, when the lock cover 3 is press-fitted into the operation handle 2 along the solid line arrow, the circuit breaker can be locked in one of the "ON" and "OFF" states and can be locked in the other state. The cover 3 may be pulled out and press-fitted along the chain line arrow at the position of the chain line of the operation handle 2, and the operation handle 2 is restrained in the "on" or "off" position.

[Problems to be solved by the invention]

In such a conventional device, the press-fitting state varies depending on the height dimension of the protruding strip 3c of the square hole 3d, and the fitting state becomes unstable when the attachment and detachment is repeated even if the dimension control is severe, and the lock cover 3 However, there are drawbacks such as that the function as a handle lock device may not be fulfilled, and that it may be dropped during insertion and removal during reversing use, which is troublesome in handling.

The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and provide a handlebar locking device for a switch that can switch between "on" and "off" side locks while being connected to an operating handle without increasing dimensional accuracy. To do.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention is a switch for turning on and off a switch by rotating an operation handle protruding from a square window provided on a case of the switch, one end of which is the operation handle. Is rotatably engaged with and supported by the tip of the operation handle, and the other end of the operation handle is turned into a position on the entrance side and a position on the cut side to be attached to the edge of the square window at a position opposite to the operation position of the operation handle. A lock lever configured to be engageable is provided.

[Action]

In the handle lock device according to the present invention, one end of the lever is rotatably engaged with and held by the end of the handle by utilizing both side recesses of the operation handle, and the lock lever is rotated on the handle. By doing so, the other end of the lock lever is reversed to the entry side position and the cutting side position and locked to the edge of the corner window protruding from the handle to lock the handle. The handle can be turned on and off while it is still connected to, and the handle can be locked at positions on both sides of the turn.

(Embodiment) FIGS. 1 to 4 are views showing an embodiment of a handle lock device for a switch according to the present invention. FIG. 1 is a perspective view of essential parts, and FIG. Is a perspective view showing a locked state, FIG. 3 is a perspective view showing a locked state on the operation handle entry side, and FIG. 4 is a longitudinal sectional view showing a main part engaged state.
In the figure, the same parts as those of the conventional device of FIG.
This embodiment is different from the conventional device in that the lock lever 4 is detachably attached by utilizing the recesses 2a, 2a on both sides of the operation handle 2 so that the lock lever 4 can be rotatably engaged, without being removed from the operation handle 2. It is possible to lock the entrance side and the cut side only by reversing the lock lever 4 by turning. For this purpose, the lock lever 4 is provided with cylindrical protrusions 4a, 4a that rotatably engage with the recesses 2a, 2a so as to sandwich the operation handle 2 from both sides, and the flexible arms are arranged to face each other. 4b, 4b, and mountains having sloping slopes 4c, 4c that are integrally extended to the arms 4b, 4b and have their tips engaged with the entrance side edge 1b and the cut side edge 1c of the square window 1a of the case 1 so as not to easily disengage. The lock bar 4d and the lock bar 4d form a main part, and protrusions 4e, 4e for facilitating the switching of locks are provided on both side surfaces.

In the above structure, the lock lever 4 is coupled to the recesses 2a, 2a of the operation handle 2 by the arm 4 of the lock lever 4.
b and 4b are opened on both sides, and the protrusions 4a and 4a are formed in the recesses 2a and 2a.
And the arms 4b and 4b are released from the original state to be integrated with each other. As a result, the operation handle 2 can be inserted and operated while the lock lever 4 remains integrated as shown by the chain line, and at the same time, after the completion of the insertion operation, the lock lever 4 is pivoted to cut its tip as shown in FIG. Side edge 1c
The operation handle 2 is locked at the insertion position by being press-fitted into. This also applies to the off operation. Therefore, since it is not necessary to remove the lock lever 4 from the operation handle 2 at the time of turning on and off, the handling becomes easy, and at the same time, a stable locked state and a long life can be obtained without a portion for particularly increasing the dimensional accuracy.

[Effect of device]

According to this invention, the lock lever is rotatably coupled by utilizing the recesses on both sides of the operating handle for preventing slime and sink marks, so that it is possible without removing the operating handle when turning it on and off. Therefore, it is possible to provide a handlebar locking device for a switch, which has improved handleability and can withstand long-term use.

[Brief description of drawings]

1 to 4 are views showing an embodiment of a handle lock device for a switch according to the present invention. FIG. 1 is a perspective view of essential parts, and FIG. 2 is a lock state at the operating handle cut side. Fig. 3 is a perspective view showing a locked state at the operating handle entry side, Fig. 4 is a longitudinal sectional view showing the engaged state of essential parts, and Figs. 5 and 6 are handle locks for conventional switches. It is a figure which shows an example of an apparatus, FIG. 5 is a disassembled perspective view, and FIG. 6 is a principal part longitudinal cross-sectional view. 1 ... Case, 1a ... Square window, 1b ... Entrance side edge, 1c ... Cutting side edge, 2 ... Operation handle, 2a ... Recess, 4 ... Lock lever, 4a ... Protrusion, 4b ... Arm, 4d ... Lock bar.

Claims (1)

[Scope of utility model registration request] 1. A switch for turning on and off a switch by rotating an operation handle protruding from a square window provided on a case of the switch, one end of which can be rotated to a tip portion of the operation handle. Lock lever configured so that the other end thereof is inverted between the entry side and the cut side of the operation handle and engages with the edge of the square window at the position opposite to the operation position of the operation handle. A handle lock device for a switch, characterized by being provided with.