JPH0992525A - Powerful magnet with attraction releasing mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the attractive surface of a magnet attraction-fixed to an attracted body to be released by simple structure and operation. SOLUTION: A recession 11 is made in the bottom of a holder 1. A magnetic body 21 forming a magnet 2 and a yoke 22 encircling this magnetic body 21 for exposing the attractive surface are housed in this recession 11 and fixed. A cam 3 for actuating the magnetic body 21 and an operating part of the cam 3 are arranged near the magnetic body 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strong magnet having a suction release mechanism, which is capable of releasing the attraction surface of a magnet fixed to an object to be attracted by a simple structure and operation. is there.

[0002]

2. Description of the Related Art Generally, a magnet having a strong attractive force is relatively large, and there are many magnets for commercial use such as height measuring instruments and scoring instruments on a surface plate. Then, the suction is released by rotating the dial knob from the outside of the holder containing the magnet body to separate the magnetic body of the magnet body from the yoke to eliminate the suction force.

[0003]

However, since magnets having a strong attractive force are relatively large, there are many magnets for business use. However, magnets having a small attractive force are used for general household use. It is the fact that it is hardly used for the use as a stationery or a stationery because it is difficult to release the suction using fingers.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention is provided to achieve the above object and solve the problems of the prior art. That is, according to the present invention, in a strong magnet having a suction release mechanism, a recess is formed in the bottom surface of a holder, and a magnetic body forming a magnet body in this recess and a yoke surrounding the magnetic body are exposed at the suction surface. Thus, the cam is housed and fixed, and a cam for operating the magnetic body is arranged in the vicinity of the magnet body, and an operating portion of the cam is provided.

[0005]

The operation based on the above means will be described. First, the exposed surface of the magnet body that exposes only the suction portion and is housed in the holder is strongly attracted and fixed to the surface of the attracted body. Then, the longest (highest) dimension position of the cam is pressed against the surface of the attracted object and twisted through the cam operating portion, whereby the magnet body is separated from the surface of the attracted object. That is, normally, the yoke of the magnet body is attracted and fixed by a strong attraction force to the surface of the attracted body slightly protruding from the bottom surface of the holder. In this state, the force of the human hand does not move even if the force is applied in any direction such as vertical, horizontal, diagonal, or upward. Therefore, when a force that lifts up only one side of the magnetic body of the magnet body is applied by operating the operation part of the cam, the longest height part from the shaft center of the cam presses against the surface of the attracted body and lifts up the magnet body. When one side of the magnetic body is lifted up against the attraction force of, the magnetic body separates from the surface of the attracted body.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A strong magnet having a suction releasing mechanism according to the present invention will be described below with reference to the drawings. 1 is a vertical sectional front view showing a first example, FIG. 2 is an operation diagram of FIG. 1, FIG. 3 is a vertical sectional side view of a cam portion of FIG. 1, FIG. 4 is a perspective view showing a second example, and FIG. Figure 4
5 is a sectional view taken along line 5-5 of FIG. 6, FIG. 6 is a sectional view of the cam and the operating portion taken along line 6-6 of FIG. 4, FIG. 7 is a sectional view showing another example of FIG. 6, and FIG. It is sectional drawing which shows another example.

In FIG. 1, reference numeral 1 denotes a nonmagnetic holder made of a synthetic resin material, and a recess 11 for accommodating a magnet is formed on the bottom surface thereof. Reference numeral 2 denotes a magnet body, which is housed in the recess 11 so that the attracting surface is exposed by interposing the yoke 22 between the outer side and the middle of each of the plurality of magnetic pieces 21, and the shaft 12 and the hole 13 of the holder and the magnetic body. The holder 1 and the magnet body 2 are inserted and fixed through the holes 22 of the body and the holes 23 of the yoke.
Reference numeral 3 is a non-magnetic cam, which is a magnetic body 2 housed in a holder.
It is arranged so as to be fitted into the concave portion 12 formed in the vicinity thereof, and is connected by the shaft 42 of the operating portion 4 and is set so that the lever 41 of the operating portion operates. Denoted at 5 is a pusher body made of a non-magnetic material, which is provided at a portion of the cam 2 which is in contact with the surface of the attracted body. The pusher body 5 moves up and down in the cam recess 12 following the operation of the cam. There is.

[0008]

[Specific Usage Example] A specific usage example according to the above embodiment will be described. First, expose only the suction site and hold
The magnet body 2 housed in the holder is retracted from the bottom surface of the holder via the operation portion 4 of the cam 3. That is, the attracting surface of the yoke 21 of the magnet body slightly protruding from the bottom surface of the holder-1 is attracted and fixed to the attracted object surface A with a strong attracting force. In this state, the force of the human hand does not move even if the force is applied in any direction such as vertical, horizontal, diagonal, or upward. Therefore, when the operation portion 4 of the cam 3 is operated to apply a force to lift only one side of the magnet body 2, a portion having the longest height L from the shaft center of the cam comes into pressure contact with the surface A of the attracted body, and By lifting one side of the magnetic body against the attraction force, the magnetic body is separated from the surface of the attracted body.

[0009]

EFFECTS OF THE INVENTION Since the present invention has the above-described structure, when a magnet having a small size and a strong attraction force is used for general household use, stationery or business use, the attraction can be easily released, so that it is safe and secure for anyone. It is convenient to handle. In addition, the magnet body that exposes only the suction part and is housed in the holder is projected and retracted from the bottom surface of the holder through the cam operation mechanism. That is, the yoke of the magnet body is attracted and fixed by a strong attraction force to the attracted body slightly protruding from the bottom surface of the holder. In this state, the force of the human hand does not move even if the force is applied in any direction such as vertical, horizontal, diagonal, or upward. Therefore, when a force is applied to actuate the operation mechanism of the cam to lift it to only one side of the yoke of the magnet, the height of the cam farthest from the shaft center presses the surface of the attracted body, and the attractive force of the magnet is pulled. By lifting one side of the magnetic body against the magnetic field, the magnetic body can be easily separated from the surface of the attracted body. further,
By placing the pusher body against the cam for releasing the magnet body, there is no direct pressure contact with the cam, and there is no risk of damaging the surface of the attracted body.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional front view showing a first example of a strong magnet having a suction release mechanism according to the present invention.

2 is an operation diagram of FIG. 1. FIG.

FIG. 3 is a vertical cross-sectional side view of the cam portion of FIG.

FIG. 4 is a perspective view showing a second example.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

6 is a cross-sectional view of a cam and an operating portion taken along line 6-6 of FIG.

FIG. 7 is a cross-sectional view showing another example of FIG.

8 is a cross-sectional view showing still another example of FIG.

[Explanation of symbols]

 1 Holder-2 Magnet body 3 Non-magnetic cam 4 Cam operation part 5 Pusher body that interlocks with the cam 11 Magnet body accommodating recess 12 formed in the holder 12 Cam accommodating recess 41 Cam operating part lever

Claims (1)

[Claims] 1. A magnetic body (2) having a recess (11) formed in the bottom surface of a holder (1) and forming a magnet body (2) in the recess.
1) and a yoke (22) surrounding the magnetic body are housed and fixed so as to expose the attraction surface, and a cam (3) for operating the magnetic body is arranged near the magnet body. Further, a strong magnet having a suction release mechanism, characterized in that an operating portion (4) is provided on the cam.