JP2007087824A - Circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit breaker easy to clean while having an improved appearance, wherein dust is not easily accumulated around a handle. <P>SOLUTION: In this circuit breaker 1, the operating handle 10 is formed by a main body part 10c having a shaft part 10a journaled to a case 2, and a handle part 10d extended on the main body part 10c and projected from an opening part 2a formed on the top face of the case 2 to switch on and off an electric path from the outside, and the operating handle is provided so as to freely fall and rise in the manner that the handle part 10d falls when it is at the ON position, and the handle part 10d rises when it is at the OFF position. This circuit breaker is formed so that when the operating handle 10 is at the ON position, the whole handle part 10d is fitted in the opening part 2a and its outside surface becomes almost flush with the top face of the opening part 2a of the case 2 to cover the opening part, and when the operating handle 10 is at the OFF position, the main body part 10c excluding the handle part 10d becomes almost flush with the top face of the opening part 2a of the case 2 to cover the opening part 2a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an operation handle of a circuit breaker.

  In general, the circuit breaker is provided with an operation handle for turning the electric circuit on and off from the outside in an opening formed on the upper surface of the case so that the handle part can be tilted up and down. The handle portion protrudes from the opening of the case (see Patent Document 1). However, since the appearance is not good when the handle portion is protruded, there is a case where the appearance is improved by making the handle portion substantially flush with the upper surface of the case when the operation handle is on (see Patent Document 2). ).

JP 2004-55173 A (FIGS. 1 and 2) Japanese Patent Laying-Open No. 2005-235670 (FIGS. 1 and 2)

  However, in the conventional circuit breaker in which the handle portion is substantially flush with the upper surface of the case when the operation handle is turned on, one side end of the opening portion is lowered and the upper surface of the case is formed in a step shape. Therefore, when the operation handle is on, the outer surface of the handle portion and the upper step portion of the case upper surface are substantially flush, but the tip of the handle portion is not flush with the lower step portion of the case upper surface, In addition, even when the operation handle is in an off state, the opening is formed in a step shape, and the main portion of the operation handle is formed in a substantially circular shape. For this reason, there are the disadvantages that the appearance is not good, dust tends to accumulate, and cleaning is difficult.

  The present invention includes a main body having a shaft portion that is pivotally supported by a case, and a handle portion for projecting from an opening formed on the upper surface of the case and extending from the main body to turn the electric circuit on and off from the outside. In the circuit breaker that can be tilted up and down so that the handle is tilted when the handle is turned on and the handle is raised when it is turned off, the handle is turned on when the handle is turned on. The whole fits into the opening and the outer surface is substantially flush with the upper surface of the case opening and closes the opening.When the operation handle is off, the main part is the case opening except for the handle. It is characterized in that it is substantially flush with the upper surface to block the opening.

  According to the present invention, there is an effect that the appearance is improved and dust is less likely to collect around the handle, which makes cleaning easier.

  An operation handle is composed of a main body portion having a shaft portion that is pivotally supported by the case, and a handle portion that extends from the opening portion formed on the upper surface of the case and that is extended from the main body portion to turn the electric circuit on and off from the outside. In the circuit breaker that is formed and can be tilted up and down so that the handle part falls when the operation handle is on and the handle part stands when it is off, the entire handle part is opened when the operation handle is on The outer surface is substantially flush with the upper surface of the case opening and closes the opening, and when the operation handle is off, the main body except the handle is substantially the same as the upper surface of the case opening. They are formed so as to close the opening.

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

  The circuit breaker 1 includes terminal portions 3 and 3 at both ends in the longitudinal direction of the case 2, and the switching contacts 4, the overcurrent tripping device 5, and the electromagnetic tripping between the terminal portions 3 and 3 in order from the left side of FIG. An apparatus 6 is disposed, and these are electrically connected to form an electric circuit, and an opening / closing mechanism 7 for opening and closing the switching contact 4 at the center of the case 2, an overcurrent tripping device 5 and an electromagnetic tripping device A tripping member 8 interlocking with the tripping operation 6 is provided, and the opening / closing mechanism portion 7 is connected via a link 9 to an operation handle 10 for turning on and off the electric circuit from the outside.

  The operation handle 10 has a main body portion 10c having a shaft portion 10a that is pivotally supported by the case 2 and a connecting portion 10b to which the link 9 is connected, and extends from the main body portion 10c and stands up when it is off. The handle portion 10d protrudes from the formed opening 2a, and the handle portion 10d is provided so as to be tiltable so as to fall when turned on and to stand when turned off.

  When the handle portion 10d is tilted leftward from the off position in FIG. 1 to the on position in FIG. 2, the main body portion 10c rotates counterclockwise to operate the opening / closing mechanism portion 7 via the link 9, thereby opening / closing contact points. 4 is closed and the electric circuit is turned on, and when the operation handle 10 is turned on, the overcurrent tripping device 5 or the electromagnetic tripping device 6 operates by detecting an abnormality in the electric circuit, and the tripping member 8 rotates. When the opening / closing mechanism 7 is unlocked and the opening / closing mechanism 7 operates, the switching contact 4 is opened, the electric circuit is turned off, and the main body 10c is rotated clockwise through the link 9. The handle portion 10d rises to the off position.

  The handle portion 10d is formed so that the entire handle portion 10d fits into the opening 2a and the outer surface is substantially flush with the upper surface of the opening 2a of the case 2 to close the opening 2a when in the ON position. The portion 10c is formed so as to be substantially flush with the upper surface of the opening 2a of the case 2 except for the handle 10d when the handle 10d is in the off position.

  By forming the operation handle 10 in this way, the opening 2a is not uneven even if the handle portion 10d is in the on position or the off position, so that the appearance is improved and dust does not easily collect around the operation handle 10, Easy to clean.

  Although the circuit breaker of this embodiment cannot be manually turned off, for example, when applied to a circuit breaker having a leakage protection function or a phase failure protection function, a test for confirming these functions is performed. The circuit can be used to operate the protection function by pressing the test switch to turn off the electric circuit and turn off the operation handle. Also, as shown in FIG. By operating the tripping member 8 by pressing the button 11, the engagement with the opening / closing mechanism unit 7 is released to operate the opening / closing mechanism unit 7, the electric circuit is turned off, and the operation handle 10 is turned off. be able to.

It is sectional drawing of the state in which the operation handle of the circuit breaker concerning this invention is OFF. It is sectional drawing of the state in which the operation handle of the circuit breaker concerning this invention is ON. It is sectional drawing which shows the modification Example of the circuit breaker based on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Circuit breaker 2 Case 2a Opening part 10 Operation handle 10a Shaft part 10c Main part 10d Handle part

Claims (1)

  An operation is performed with a main body having a shaft portion that is pivotally supported by the case, and a handle portion that extends from the main body and protrudes from an opening formed on the upper surface of the case to turn the electric circuit on and off from the outside. A circuit breaker which is formed so as to be tiltable so that the handle portion is tilted when the operation handle is turned on and the handle portion is raised when the operation handle is turned off. The entire portion is fitted into the opening, and the outer surface is substantially flush with the upper surface of the opening of the case to close the opening. When the operation handle is off, the main body except for the handle is removed. A circuit breaker characterized in that the opening is substantially flush with the upper surface of the opening of the case so as to close the opening.

Images