JPS603761B2 - Adsorption device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction device that can more reliably perform suction when forcibly adhering an armature to a core.

As a means of maintaining a certain operating state against the force of a spring or the like, an attraction ring using a magnet is widely used.

In this type of adsorption device, the armature is mechanically driven by an actuating plate to bring it close to the core of the magnet device and attract it. You need to press it hard. However, when the mechanism of the actuating plate that presses the armature has a constant amount of actuation, there is no such action of strongly pressing once, and there is a problem in ensuring suction. This invention was made in consideration of these points, and it is possible to use a spring to strongly press the armature once against the core even if the amount of operation of the pressing mechanism is constant, and to make it possible to press the armature against the core once during this operation. An object of the present invention is to provide a suction device capable of absorbing the reaction force applied to the suction device and performing more reliable suction.

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

For example, to explain an example in which the core 11 is used in a shutter mechanism of a camera, the core 11 is U-shaped as shown in FIGS. 112, and their end faces are formed on the same plane. An excitation coil 13 is wrapped around one single core 112 . In addition, each core 111
, 112 so as to be sucked across the end faces of the armature 1.
4 is provided, the armature 14 being connected via a shaft 15 to an actuating plate 16. The shaft 15 is provided through a portion located approximately in the center of the single cores 111 and 112 of the armature 14, and has, for example, a flap portion 151 on one side, and an E-ring 17 can be attached to the other side. In other words, the E-ring 17 prevents the actuating plate 16 from falling off, and the flap portion 151 prevents the armature 14 from falling off. Further, a predetermined gap is provided between the connection portion of the actuating plate 16 with the shaft 15 and the surface of the armature 14 and the shaft 15, and the thickness of the shaft 15 is larger than the thickness of the armature 14 and the actuating plate 16. Set it long enough. A coil spring 18 is interposed around the shaft 15 between the connecting portion of the actuating plate 16 and the armature 14, and a cushioning material 19 made of polyurethane or the like is provided between the armature portion 151 of the shaft 15 and the armature 14. be mediated. The actuating plate 16 is connected to the shaft 1
The lever part is bent at right angles to the connecting part with the armature 14, and is rotatably supported by a ball 20 in the middle, and the shaft part 20 has a protruding part that protrudes on the opposite side from the armature 14. 21 and a protrusion 22 that protrudes in a direction perpendicular to the protrusion 21 and away from the core 11.

A member 23 that operates in response to winding of the film is provided adjacent to this protrusion 22, and a spring 24 that applies a tensile force in a direction opposite to that of the protrusion 22 is provided to the other protrusion 21. In such a configuration, the core 11
is always magnetized by a permanent magnet 12, and the coil 1
3, a current is passed only when the armature 14 is separated. FIG. 1b shows that the protruding portion 22 is pushed by the member 23, and the actuating plate 16 rotates with the ratchet 20 as a fulcrum and the armature 14 is rotated.
is moved and comes into contact with the single cores 111 and 112, and the suction operation is completed. By the way, in this device, before reaching the state shown in FIG. 1b, the spring 18 is momentarily compressed and the armature 14 is compressed as shown in FIG.
2 is strongly pressed. Since a predetermined interval is provided between the circumferential surface of the shaft 15, the connecting portion of the actuating plate 16, and the armature 14, even if the shaft 15 has a frame, the armature 14 is connected to the end surface of the single cores 111, 112. Becomes close to and firmly pressed against. In this way, the armature 14 is pressed while compressing the spring 18 by the rotational force of the actuating plate 16, but at the same time, the spring 18
The reaction caused by the strong force caused by the core alone 111, 112
Joined Amartya 14 from. Therefore, Amartya 1
4 receives an impact in the direction of separating from the cores 111 and 112, but since this device is provided with a cushioning material 19, the impact is absorbed by this cushioning material 19. For this reason, it is not affected by the reaction force caused by the provision of the spring 18, and reliable suction is always performed. When a current is applied to the coil 13 in the state shown in FIG. 1b, the magnetic field of the core 11 is canceled by the magnetic field generated in the coil 13, and the attraction force of the core 11 is eliminated. Therefore, the actuating plate 16, to which a biasing force is always applied by the spring 24 in a direction in which the shaft 15 side is separated from the core 11, is rotated around the shaft 20 as a fulcrum, and the armature 14 is moved around the core 111 as shown in FIG. , 112 and enters a standby state. In this way, in this suction device, even if the actuating plate 16 has a constant operating penetration, the spring 18 causes the armature 14 to move between the cores 111 and 1 as described above.
Since it is temporarily strongly pressed against 12, reliable adsorption is performed, and the reaction force caused by the spring 18 when pressed is also absorbed by the cushion material 19, and separation due to the reaction force is also prevented.

Furthermore, in addition to the action of the spring 18, since a space is provided between the shaft 15, the actuating plate 16, and the armature 14, the armature 14 comes into close contact with the core units 111 and 112 in a planar manner, making it more reliable. Adsorption is achieved. As described above, according to the present invention, it is possible to provide a suction device that can perform reliable suction even if the amount of operation for pressing the armature against the core is constant.

[Brief explanation of the drawing]

FIG. 1 shows a suction device according to an embodiment of the present invention, in which a is a plan view, b is a partially cutaway sectional view, and FIGS.
The figure is a partially broken sectional view showing various operating states of the suction device according to the present invention. 11...core, 111,112...core alone, 12...permanent magnet, 13...coil, 14...armature, 15... ...Axis, 1
6... Actuation plate, 17... E-link, 18...
...Coil spring, 19...Cushion material, 20...
Shaft, 21, 22... protrusion, 23... member, 24...
···spring. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A core of a magnet device in which a pair of end faces are formed on the same surface, an armature that is attracted across each end face of this core, and a portion of this armature that is located between each end face of the core through a shaft. an actuating plate that is coupled to actuate the armature; and a cushion material interposed between the actuating plate and the armature and between an end of the shaft opposite to the actuating plate and the armature. Device.