JPH05325730A - Microswitch protecting mechanism - Google Patents

Abstract

PURPOSE:To prevent the breakage of a microswitch for detecting the position of a relatively moving unit. CONSTITUTION:A bracket 12 is provided with a microswitch 11 which is brought into contact with a unit 22 to detect the position of the unit 22. The bracket 12 is supported on a base 17 through a support shaft 16 in such a manner as to be movable in the turning direction, and also energized by a leaf spring 13 for returning the microswitch 11 to the initial position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microswitch protection mechanism, and more particularly to a microswitch protection mechanism used for detecting the position of a unit that moves relative to each other.

[0002]

2. Description of the Related Art Conventionally, a microswitch has been widely used as a means for detecting the position of a unit that is relatively movable. Such a micro switch is provided, for example, on a stationary member such as a base or a bracket, and detects that a unit moving toward the micro switch has reached a predetermined contact position.

[0003]

However, since the conventionally known microswitch is fixedly provided to the base or the bracket, the detection position of the unit can be set when the unit is stored in a predetermined position. However, there is an inconvenience that the micro switch is destroyed when the position shifts to a so-called overstroke direction.

[0004]

It is an object of the present invention to improve the disadvantages of the conventional example, and in particular, when an overload due to a detection position shift is given to the microswitch, the microswitch can be absorbed to cause the destruction of the microswitch. It is an object of the present invention to provide a microswitch protection mechanism that can be effectively protected from

[0005]

A microswitch protection mechanism according to the present invention comprises a microswitch which detects contact with a relatively movable unit, and a base which supports the microswitch via a bracket. The bracket is movably provided on the base,
The structure is normally such that it is biased by a spring that presses the microswitch to the initial position. This is intended to achieve the above-mentioned object.

[0006]

When the micro switch is overloaded due to overstroke when the unit detection position is displaced, the bracket supporting the micro switch moves against the biasing force of the spring. Therefore, such movement absorbs the overload and effectively protects the microswitch from being destroyed.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing the outline of a microswitch protection mechanism according to this embodiment, FIG. 2 is a front view thereof, and FIG. 3 is a side view thereof. There is. In these figures, the microswitch 11
Are fixed to the upper surface of the bracket 12 via bolts 15. The bracket 12 is supported by a base 17 having a U-shaped cross-section via a support shaft 16, whereby the bracket 12 is provided so as to be movable in the turning direction. Further, a hanging piece 12A is provided at one end of the bracket 12, and a free end of a leaf spring 13 which constitutes a spring is brought into contact with the hanging piece 12A. The microswitch 12 is arranged in the initial position shown in FIG.

Next, the operation of this embodiment will be described with reference to FIGS. 4 and 5.

As shown in FIG. 4, when the unit 22 is provided in the storage device 21 so that the unit 22 can be housed and the position of the unit 22 is detected by the microswitch 11, the microswitch 11 is normally operated as the unit. The detection position 24 will be detected.

As shown in FIG. 5, when the micro switch 11 is displaced to the over stroke side with respect to the detection position 24 at the detection position 35, assuming a fixed state, the micro switch 11 is overloaded. Will be given. Here, since the micro switch 11 is supported by the bracket 12 that is movably provided on the base 17, the bracket 12 pivots in the direction of the arrow in the drawing to move, thereby absorbing an overload and causing a micro switch. The destruction of the switch 11 is prevented. At this time, since the bracket 12 is urged by the leaf spring 13, the micro switch 11 moves in the misaligned detection position 3
It will be detected while being pressed by 5.

In practice, the spring for urging the bracket 12 may be replaced by another urging means such as a compression spring, a tension spring, a torsion spring, etc., in addition to the leaf spring 13.

In the description of the embodiment, the micro switch 12 is on the stationary side and the unit 22 is on the moving side.
The present invention is not limited to such an aspect, and is similarly applicable even when the micro switch 12 is provided on the moving side.

[0014]

Since the present invention is constructed and operates as described above, according to this, a bracket is provided so as to be movable, and a micro switch is provided on this bracket. Provides a micro switch protection mechanism that can absorb the load and effectively avoid the cause of destruction, and that can always detect the micro switch by pressing it to the detection position with the biasing force of the spring. There is an effect that you can.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of this embodiment.

FIG. 2 is a front view of FIG.

FIG. 3 is a right side view of FIG.

FIG. 4 is an explanatory diagram showing an operation of the present embodiment.

FIG. 5 is an operation explanatory view showing a mode in which the micro switch moves.

[Explanation of symbols]

 11 Micro switch 12 Bracket 13 Leaf spring that constitutes spring 17 Base 22 Unit

Claims (1)

[Claims] 1. A bracket equipped with a micro switch for detecting contact with a unit that is relatively movable, and a base that supports the micro switch via the bracket, wherein the bracket is movably provided on the base. The microswitch protection mechanism is characterized in that it is always urged by a spring that presses the microswitch to the initial position.