JPH039294Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to an electromagnetic attraction device used for switching the operation of a tape recorder, etc.

(b) Prior Art Cassette-type tape recorders that use magnetic tape, called cassettes, have become widespread, but in some of these tape recorders, the switching operation to each operating state is controlled by the suction operation by the power supply operation. There is a method that uses the attraction force of an electromagnet to perform this. Such a switching device is composed of an electromagnet fixed to a fixed substrate and an adsorption member attached to a displacement member that performs operation switching and attracted by the electromagnet. In a switching device with such a configuration, if the positional relationship between the adsorption part provided on the electromagnet and the adsorption member provided on the displacement member is misaligned, the adsorption force will be extremely poor, so the mounting position must be carefully adjusted. There is. An example of a technology that improves this point is Utility Model Publication No. 59-34089.
There is something disclosed in the publication No.

(c) Problems to be solved by the invention The above-mentioned publication describes a technique in which the suction member is installed so that it can be displaced in the front, rear, left, right, and up and down directions. The member is made movable around the boss, and such technology is difficult to apply to a displacement member that moves linearly. The present invention aims to provide an electromagnetic adsorption device that is improved in this respect.

(d) Means for Solving the Problems The suction device of the present invention comprises a displacement plate attached to a fixed substrate etc. so as to be movable between an operating position and a non-operating position, and a displacement plate provided on the displacement plate. and a suction part that is rotatably mounted on a mounting pin and is attracted by a suction part provided on an electromagnet when the displacement plate is in the operating position, and the central part of the mounting pin is A protrusion with a large diameter is formed on the top.

(e) Effect This invention forms a protrusion with a large diameter in the center of the mounting pin provided on the displacement plate and on which the suction member is rotatably attached, and uses the protrusion as a fulcrum. This allows the suction member to swing in the vertical direction.

(f) Examples The drawings are all related to the adsorption device of the present invention.
The figure is a bottom view of the main part, Figure 2 is an exploded perspective view of the main part,
FIG. 3 is a side sectional view of the main part. In the figure, 1
is a displacement plate that is attached to the fixed base plate 2 so as to be able to be displaced in the directions of arrows A and B by the cooperation of guide pins 3, 4 and guide holes 5, 6, and is biased in the direction of arrow A by a spring 7. For example, when a playback operation button (not shown) of a tape recorder is operated, it is displaced in the direction of arrow B, which is the operating position, against the biasing force of a spring 7. Reference numeral 8 denotes a sliding plate which is attached to the displacement plate 1 so as to be able to be displaced in the directions of arrows A and B by cooperation of the guide pin 9, the guide hole 10, the mounting pin 11 and the guide groove 12, and the spring 13 is biased in the direction of arrow B.
The diameter of the central part of the mounting pin 11 is the same as that of the support shaft 1.
A protrusion 11b larger than 1a is formed.
Reference numeral 14 denotes an adsorption member rotatably mounted by the mounting pin 11, and its rotational displacement is regulated by regulating portions 8a and 8b bent on the sliding plate 8. are related to each other in such a way that Further, the suction member 14 is attached so as to be able to swing around a protrusion 11b formed on the attachment pin 11 as a fulcrum. Reference numeral 15 designates an electromagnet which is fixed to the fixed substrate 2 and has an adsorption portion 16 formed thereon which adsorbs the adsorption member 14 when the displacement plate 1 is in the operating position, and has a built-in permanent magnet and is energized. The permanent magnet is configured to generate magnetic flux in a direction that weakens the attraction force of the permanent magnet. In such a configuration, the attraction force by the permanent magnet incorporated in the electromagnet 15 resists the biasing force of the spring 7 to hold the displacement plate 1 in the operating position, and when the electromagnet 15 is energized, the spring 7 The biasing force of is set to be larger than that of .

The suction device of the present invention is constructed as described above, and its operation will be explained next. In the state shown in FIG. 1, the displacement plate 1 is moved by the biasing force of the spring 7.
is held in a non-operating position in the direction of arrow A, and the electromagnet 15 is not energized. In this state, when a regeneration operation button (not shown) is operated, the displacement plate 1 is displaced in the direction of arrow B against the biasing force of the spring 7. When the displacement plate 1 is displaced to the operating position in the direction of arrow B, the suction member 14 attached to the displacement plate 1 comes into contact with the suction portion 16 provided on the electromagnet 15 at the position shown by the broken line in FIG. become a state. When the attraction member 14 contacts the attraction portion 16, the attraction member 14 is attracted to the attraction portion 16 of the electromagnet 15 by the attraction force of the permanent magnet incorporated in the electromagnet 15. As a result, the displacement plate 1 is held in the operating position against the biasing force of the spring 7, and the tape recorder is in the playback operating state.
When a stop operation is performed in such a state, power is supplied to the electromagnet 15, and a magnetic flux is generated in a direction that weakens the attraction force of the permanent magnet incorporated in the electromagnet 15. As a result, the biasing force of the spring 7 in the direction of arrow A becomes larger than the attraction force of the electromagnet 15 in the direction of arrow B, and the spring 7
The biasing force causes the displacement plate 1 to return to its non-operating position in the direction of arrow A. As a result of this operation, the displacement plate 1 returns to the non-operating position, and as a result, the tape recorder comes to a halt.

As described above, the displacement operation of the displacement plate 1 to the operating position and the return operation to the non-operating position are performed in this embodiment, but when the positional relationship between the displacement plate 1 and the electromagnet 15 is deviated, The operation will be explained. If the displacement amount when the displacement plate 1 is displaced to the operating position is large, the displacement operation of the sliding plate 8 in the direction of arrow A will absorb the large displacement, and the attraction member 14 and the electromagnet 15 will be The contact relationship with the suction part 16 is maintained in a good state. Furthermore, if a positional deviation occurs in the left-right direction between the suction member 14 and the suction part 16, the positional deviation is absorbed by the rotational displacement of the suction member 14 about the mounting pin 11, and If a vertical positional shift occurs between the suction member 14 and the suction part 16, the suction member 1
The protrusion 11b formed on the mounting pin 11 of No. 4
The positional shift is absorbed by the swinging displacement in the vertical direction with the suction member 14 as the fulcrum.
The contact relationship between the electromagnet 15 and the adsorption portion 16 is maintained in a good state.

In this embodiment, a protrusion 11 is provided on the mounting pin 11 as a means for vertically swinging the suction member 14.
b is formed, but it is also possible to form a bulge so that the center part has the largest diameter. In addition, although we have described an electromagnet 15 that has a permanent magnet built into it, we use an electromagnet that is configured so that power is supplied when the displacement plate 1 is displaced to the operating position, and the attraction force acts only during that time. You can also do that. Although the description has been given of the case where the operation of a tape recorder is switched, it is of course possible to implement the present invention in various switching devices.

(g) Effects of the invention In the suction device of the present invention, the suction member, which is attached to the displacement plate and is attracted by an electromagnet when the displacement plate is in the operating position, can be rotated and swung by the mounting pin. Even if there is an installation error between the displacement plate and the electromagnet, it is possible to maintain a good contact relationship between the attraction member and the attraction part of the electromagnet by absorbing the error. The practical value is very great.

[Brief explanation of drawings]

The drawings all relate to the adsorption device of the present invention.
The figure is a bottom view of the main part, Figure 2 is an exploded perspective view of the main part,
FIG. 3 is a side sectional view of the main part. Explanation of main drawing numbers, 1...Displacement plate, 2...Fixed board, 8...Sliding plate, 11...Mounting pin, 11b...
... protrusion, 14 ... adsorption member, 15 ... electromagnet,
16...Adsorption part.

Claims (1)

[Scope of utility model registration request] An electromagnet whose suction operation is controlled by power supply operation, a displacement plate attached to a fixed board etc. so as to be movable between an operating position and a non-operating position, and a mounting pin provided on the displacement plate. and an adsorption member that is rotatably attached to the mounting pin and is adsorbed by an adsorption part provided on the electromagnet when the displacement plate is in the operating position, and a large diameter is attached to the center of the mounting pin. What is claimed is: 1. An electromagnetic adsorption device characterized in that a protrusion is provided, and the adsorption member can be swung in the vertical direction using the protrusion as a fulcrum.