JPH071711Y2 - Lever operated switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a multi-directional lever operation type switch mounted on a control panel of a machine tool or the like for use.

[Conventional technology]

First, FIGS. 3 and 4 show a conventional structure of a multidirectional lever operation type switch to which the present invention is applied. In the figure,
Reference numeral 1 is a switch main body incorporating a plurality of sets of contact mechanisms, actuators, etc. 2, reference numeral 3 is an operating lever pulled forward from the switch main body 1, reference numeral 3 is an operating knob, and reference numeral 4 is a fastening for panel fastening screwed into a front end neck portion of the switch main body 1. An attached nut, 5 is a bellows packing as a waterproof cover, and 6 is a switch mounting panel such as a control panel.

Here, the switch body 1 is loaded from the inside of the control panel, and the neck portion of the switch body 1 and the operation lever 2 are projected forward in front of the mounting panel, and the nut is attached to the neck portion of the switch body 1 from the outside through the operation lever 2. 4 is screwed in and fixed to the mounting panel 6. Further, the bellows packing 5 is made of rubber or the like, and the base portion on the large diameter side is closely adhered to the nut 4 and is integrally coupled,
A hub 5a formed as a fitting portion on the other end side is press-fitted on the shaft of the operating lever 2 by providing a tightening margin. In this way, the bellows packing 5 is tightly press-fitted to the operation lever 2 by tightening it to prevent water, oil, etc. from entering the inside of the switch body 1 from the outside in the assembled state. . To insert the bellows packing 5 into the operation lever 2, the hub 5a of the bellows packing 5 is fitted into the lever shaft with the knob 3 removed.

The operation of such a multi-directional lever operation type switch is well known, and when the operation lever 2 is selected in the direction of the arrow in the drawing and is oscillated, a contact mechanism corresponding to the operation direction is operated.

[Problems to be solved by the device]

By the way, in order to attach / detach the lever operation type switch to / from the mounting panel 6 such as a control panel, it is necessary to rotate the panel fastening nut 4 to tighten or loosen it. When the nut 4 is rotated while the hub 5a at the end of the bellows packing 5 integrally coupled with the nut 4 is press-fitted onto the shaft of the operation lever 2 as described above, the bellows packing 5 is twisted. The nut cannot be easily turned, and if the nut is forcibly turned, the bellows packing 5 may be damaged such as being broken. In this respect, if the nut 4 and the bellows packing 5 are disengaged from each other and the nut is operated, the bellows packing 5 will not be accompanied by the nut 4 and the above troubles can be avoided. Requires a new connection between the nut 4 and the bellows packing 5 after the switch is mounted on the mounting panel 6, and the work is troublesome. If the connection is incomplete, the waterproof function of the switch may deteriorate. .

The present invention has been made in view of the above points, and a state in which the panel fastening nut and the bellows packing are integrally connected without twisting the bellows packing when the switch is attached to or detached from the mounting panel. It is an object of the present invention to provide a lever operation type switch in which a nut can be freely turned and operated.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, in the lever operation type switch of the present invention, the operation lever and the bellows packing hub are press-fitted to each other at a point on the shaft of the operation lever, which is slightly displaced from the steady incorporation position. It is assumed that a small diameter step portion for solving the above is formed.

[Action]

With the above configuration, the small-diameter stepped portion of the operating lever is formed at a position corresponding to the hub of the bellows packing, at a position where the bellows packing is slightly retracted from the normally installed position, and its outer diameter is larger than the inner diameter of the hub. It is set small. Therefore, by aligning the hub of the bellows packing with the small diameter step on the axis of the operating lever, a clearance fit is created between the hub and the small step, and the pressure contact fitting between the bellows packing and the operating lever is released. The bellows packing can be turned freely without restraint.

Therefore, when installing or removing the switch on the mounting panel,
If the hub of the bellows packing is aligned with the small diameter step on the shaft of the operation lever as described above and the nut is turned, the bellows packing integrally connected to the nut will not be twisted and the nut can be turned freely. Can be operated. After the switch is mounted and fixed on the mounting panel, the bellows packing is displaced from the small-diameter step portion of the operation lever to the steady incorporation position, whereby the hub is press-fitted onto the shaft and the portion is sealed. The waterproof function will be secured.

〔Example〕

1 and 2 show the construction of the embodiment of the present invention, and the same members corresponding to those in FIG. 3 are designated by the same reference numerals. That is, the basic structure of the switch is the same as that shown in FIG. 3, but a small-diameter step portion 7 is provided on the shaft of the operation lever 2. The small-diameter step portion 7 functions as an escape groove for releasing the interference fit between the bellows packing 5 and the hub 5a on the shaft of the operation lever 2, and the steady state of the bellows packing 5 shown in FIG. It is formed at a position on the axis that is slightly offset from the mounting position. The outer diameter of the small-diameter step portion 7 is selected to be smaller than the inner diameter of the hub 5a.

With such a configuration, as shown in FIG. 2, the bellows packing 5 is slightly shifted upward from the position shown in FIG. 1 so that the hub 5a is located at the small-diameter step portion 7 described above. The fitting fits into the clearance and the bellows packing 5
The constraint between the control lever 2 and the control lever 2 is released. That is, in this state, without twisting the bellows packing 5,
The nut 4 can be freely rotated while being integrally connected to the bellows pump 5.

Therefore, when the switch is attached to or detached from the mounting panel 6, first, the hub 5a of the bellows packing 5 is displaced to the position of the small diameter stepped portion 7 on the shaft of the operation lever 2 and the nut 4 is operated in this state. Thus, the nut 4 can be tightened or turned in a loosening direction without applying an unreasonable twisting force to the bellows packing 5. After mounting and fixing the switch on the mounting panel 6, the hub of the bellows packing 5
By returning 5a from the position shown in FIG. 2 to the steady built-in position shown in FIG. 1 on the shaft of the operation lever 2, the press-fitting state with the tightening margin is given again, so that the waterproof function can be obtained at that part. Become.

[Effect of device]

Since the lever-operated switch according to the present invention is configured as described above, it has the following effects.

(1) When the switch is attached / detached to / from the control panel or other mounting panel, the hub of the bellows packing is temporarily displaced to the position of the small-diameter step of the operating lever, so that the bellows packing remains integrally connected to the nut. The nut can be freely turned and operated without being constrained.

(2) As a result, the bellows packing is not unduly twisted and damaged, and the nut can be turned while the bellows packing is integrally connected to the bellows packing. Also, highly reliable waterproof property can be secured.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention showing an assembled state in which a switch is mounted on a mounting panel, FIG. 2 is a state diagram when a nut is rotated and operated in FIG. 1, and FIG. 3 is a conventional lever operation type. FIG. 4 is a plan view of the switch shown in FIG. In the figure, 1: Switch body, 2: Control lever, 3: Knob, 4: Nut, 5:
Bellows packing, 5a: hub, 6: mounting panel, 7: small diameter step.

Claims (1)

[Scope of utility model registration request] 1. A lever-operated switch mounted on a mounting panel to be used, wherein a panel fastening nut is formed by passing an operating lever through a front end of a switch body having the operating lever, and one end of which is joined to the nut. In a lever-operated switch equipped with a bellows packing for waterproofing, in which the hub on the side is tightened onto the axis of the operation lever by press fitting, the bellows packing was slightly displaced from the steady installed position on the axis of the operation lever. A lever-operated switch characterized in that a small-diameter step portion is formed at a point to release pressure contact fitting between the operating lever and the hub of the bellows packing.