JPS62195104A - Bistable type high speed control solenoid - Google Patents

Abstract

PURPOSE:To obtain a small-sized and easily manufacturable bistable type high speed control solenoid which is not erroneously operated and mechanically displaced between two stable positions at a high speed by an electric signal by a method wherein two stable positions, whereon a movable core is attracted to the first or the second side plate, are provided. CONSTITUTION:Permanent magnets 7a and 7b are arranged in polarity, and when a current is not applied to a coil, it is attracted to the side of one side plate, namely, attracted to the side of a side plate 6A, for example. At this time, the side plate 6A has an N-pole, and a movable core 4 has an S-pole. At this point, when the N-pole is generated at the tip of the movable core 4 and the S-pole is generated on the end part of a bearing by applying an electric signal of the pulse width of 10ms or there about to the coil, repulsive force works on the side plate 6A and attracting force works on the side plate B, and the movable core 4 is separated from the side plate 6A and it is moved to the side of the side plate 6B. When the movable core 4 has passed the center position, the current is stopped already, and the movable core 4 is attracted to the side of the side plate 6B and it is held there. As above-mentioned, as both repulsive force and the attracting force are used simultaneously, the responding speed can be increased to a high degree, and the titled solenoid can be driven with the signal of small pulse width.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a bistable high-speed control solenoid that is mechanically displaced between two stable positions at high speed by an electrical signal.

(Prior Art) Electromagnetic devices that perform various controls by converting electrical signals into mechanical displacement are known.

For example, the structure of electromagnetic device No. 57-66505 F.
has a yoke formed of a pair of left and right pole pieces bent so that the base and tip parts face each other; A T-shaped movable piece that is a corresponding convex curve without
A stopper made of a non-magnetic material extends upward through the gap between the tips of the pole pieces at the center of the upper end of the movable piece, and when one tip of the pole pieces of the yoke is set to one pole, the other tip is the other pole, and when one tip is set to the other pole, the other tip is set to the negative pole.

According to this structure, the movable piece does not contact the pole pieces, so
It is easy to detach during movement, has a characteristic that the suction force is almost constant with respect to the stroke, and enables even higher speeds.

(Problems to be Solved by the Invention) When operating a mechanism that selects either of the two with such an electromagnetic device, it is usually biased with a spring on the -input side.
The electromagnetic device is used when displacing to the other side, and the spring is used for returning. For this reason, in order to displace it to the other side, it was necessary to keep it energized at all times.

Furthermore, when such an electromagnetic device is used to control a precision machine, it is required to be miniaturized, which makes assembly difficult and time-consuming to manufacture. Furthermore, in such an electromagnetic device, since the movable core and permanent magnet are exposed, there is a problem in that dirt and dust may adhere to the electromagnetic device, causing malfunction.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bistable high-speed control solenoid that does not malfunction, is compact, easy to manufacture, and can be mechanically displaced between two stable positions at high speed by an electrical signal.

(Means for Solving the Problems) In order to achieve the above object, a bistable high-speed control solenoid according to the present invention includes a cylindrical part provided with a winding and an upper bearing in an opening on the lower side of the cylindrical part. a bobbin having a section, a substrate inserted under the bobbin and having a bearing hole corresponding to the upper bearing section, and first and second substrates disposed on both sides of the bobbin so that their shoulders face inward. a side plate, and the first and second
first and second permanent magnets arranged corresponding to the side plates of, first and second arms that sandwich the first and second side plates and the first and second permanent magnets, and each of the parts. a yoke consisting of a bottom plate connecting the two and forming a lower bearing part;
a movable iron core that swings between shoulders of the first and second side plates around a shaft rotatably supported by the upper bearing portion, the bearing hole, and the lower bearing portion; an adsorbent attached to the shoulder of the first or second side plate, and configured to have two stable positions at which the movable iron core is adsorbed to the first or second side plate. There is.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings and the like.

FIG. 1 is a diagram showing the overall configuration of a bistable high-speed control solenoid according to the present invention.

FIGS. 2 to 9 are diagrams showing each part of the embodiment, in which FIG. 2 shows the bobbin, FIG. 3 shows the date and time, and the fourth
The figure shows the movable core, and Figure 5 shows the contact.

Figure 6 shows the side plate, Figure 7 shows the permanent magnet, and Figure 8 shows the board.

FIG. 9 shows the shaft, FIG. 10 shows the bypass piece, and FIG. 11 shows the adsorbent.

In Figures 1 to 9, 2 is a bobbin, 3 is a yoke, and 4 is a bobbin.
is a movable iron core, 5 is a contact, 6 is a side plate, 7 is a permanent magnet, 8
1 is a substrate, 9 is a shaft, 10 is a bypass piece, and 11 is an absorber.

As shown in FIG. 2, the bobbin 2 has a collar 21 on the main body 20.
, 22 are integrally molded. The main body 20 has a prismatic shape and has a hollow portion 20a formed in the center. Brim 2
In the opening of the hollow part 20a on the lower side of 2, there is a pawl 2 that constitutes a bearing.
3.23 is provided (Fig. 2(d)). Tsuba 21
, 22 are provided with a hole 24 into which a terminal pin is inserted. Legs 25 and 26 are provided for positioning during assembly. A protrusion 27 is implanted on the side surface of the collar 21, 22 to facilitate positioning when attaching it to a device to be controlled.

As shown in FIG. 3, the yoke 3 is made by bending both ends of a magnetic metal plate to form legs 31 and 32.

The bottom surface is provided with openings 33, 34 and cutouts 35, 36. The left and right legs 31 and 32 are provided with openings 37 and notches 38 for mounting positioning.

As shown in FIG. 4, the movable iron core 4 has a shoulder portion 41 on the upper side.
, 42 are provided, and a portion 43 for attaching the contact 5 is provided at the top. A hole 44 into which the shaft 9 is press-fitted is bored in the lower side of the movable iron core 4 .

As shown in FIG. 5, the contact 5 has a hole 51 into which the movable core 4 is inserted. contact 75
is molded from non-magnetic synthetic resin or the like. 52 is
It is a lever for engaging with a controlled object.

As shown in FIG. 6, the side plate 6 has a shoulder portion 61 bent and raised at the upper end, and a hole 62 is bored in the center. This side plate 6 has side plates 6A and 6B on the left and right as shown in FIG.
It is placed as.

As shown in FIG. 7, the permanent magnet 7 has a rectangular parallelepiped shape, is magnetized in the direction shown in FIG. 7 fbl, and has one pole colored for identification. This permanent magnet 7 is
As shown in FIG.
, IF3.

As shown in FIG. 8, the substrate 8 has a cross-shaped hole 81 for a bearing in the center of the magnetic metal plate, and positioning notches 82 at the four corners.

The shaft 9 is made of a non-magnetic material and is the center axis of the swing of the movable iron core 4 (FIG. 9).

As shown in FIG. 10, the bypass piece 10 is a rectangular parallelepiped-shaped member, and as shown in FIG. The inserted path piece 10 is for forming a bypass magnetic path to easily separate the movable iron core 4 with a small current.

As shown in FIG. 11, the suction member 11 is a member having a U-shaped cross section, and includes bent portions 111 and 112 on both sides and a bottom plate 113 connecting these portions.
An opening 113a is provided at the bottom Fj, l13. The suction element 11 is attached by inserting its opening 113a into the attachment part 43 of the movable iron core 4, as shown in FIG. 1fa). The adsorbent 11 is attached to the movable iron core 4
Shoulder 6 of side Fj, 6A or side plate 6B swings when
1 and works to increase the magnetic attraction force.

Next, a procedure for assembling the solenoid according to the present invention will be explained.

The cylindrical portion 20 of the bobbin 2 is wound with a winding machine or the like as shown in Fig. 1 (a).
A winding 28 is applied as shown in FIG. The movable iron core 4 is inserted into the hollow part from above the bobbin, and the movable iron core assembly in which the shaft 9 is press-fitted into the shaft hole 43 is fixed to the bobbin 2. A substrate 8 forming a magnetic circuit is incorporated into the recessed portion of the lower collar 22 of the bobbin 2, and the movable core assembly is perfectly positioned. After that, the yoke 3 is inserted, and the side plates 6A and 6B are inserted on both sides of the bobbin 2.
Is there a permanent magnet on the outside of B? A and 7B are inserted.

Note that after the adsorbent 11 is inserted and fixed to the movable core 4, the contact 5 is fixed thereto. Bobbin 2 claw 23, board 8
The shaft 9 provided in the movable iron core 4 is pivotally supported by the hole 81 and the like. Finally, these are fixed with resin.

Next, the operation of the solenoid will be explained.

permanent magnet? A and 7B are arranged in polarity as shown in FIG. 1, and are attracted to one side plate side, for example, the entrance side of the side plate 6, when the coil is not energized. At this time, the side plate 6A is the north pole, and the movable iron core 4 is the south pole.

Here, if an electric signal with a pulse width of about 10 m5 is applied to the coil 28 for a short time so that an N pole is generated at the tip of the movable iron core 4 and an S pole is generated at the end of the bearing, the repulsion against the side plate 6A will be generated. A suction force acts on the sides Fj and 6B, and the movable iron core 4 moves away from the side plate 6A and toward the side plate 6B. When the movable iron core 4 passes through the neutral position, the energization has already been stopped, and it is now attracted and held by the side plate 6B.

In this way, in the present invention, the magnet is repelled.

Since both suction functions are used at the same time, the response speed (approximately 2 m
s order) became extremely fast, and it became possible to drive with a signal with a small pulse width. Moreover, since the suction element 11 is used, the suction force is large and reliability can be improved.

Movement from the side plate 6B side to 1ull@6A 1u11 is also performed in a similar manner by energizing so that the polarity opposite to that described above is generated.

The bistable high-speed control solenoid according to the present invention can be suitably used in an alternative mechanism, and does not require a spring or the like for return. For example, a camera's autofocus mechanism,
It can be used in a shutter travel mechanism, an auto-reverse mechanism 9 of an audio device, and a music selection mechanism.

(Effects of the Invention) As explained in detail above, according to the present invention, magnetic attraction force can be increased because the attraction piece is used in the movable core, and the magnetic attraction force is increased by using the first and second permanent magnets. Since it is bistable, it can be suitably used in an alternative mechanism.

In addition, since there are no exposed movable parts, there is no need to worry about dirt or dirt getting in the way of malfunctions, and 1. it can be assembled without the use of screws, making it compact and easy to manufacture.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the overall configuration of a bistable high-speed control solenoid according to the present invention. 2 to 11 are diagrams showing each part of the embodiment, in which FIG. 2 shows a bobbin, FIG. 3 shows a yoke, FIG. 4 shows a movable core, and FIG. 5 shows a contact. Figure 6 shows an inverted board, Figure 7 shows a permanent magnet, and Figure 8 shows a board. FIG. 9 shows the shaft, FIG. 10 shows the bypass piece, and FIG. 11 shows the adsorbent.

Claims (1)

[Claims] a bobbin having a cylindrical part on which a wire is wound and an upper bearing part in the lower opening of the cylindrical part; a substrate inserted into the lower side of the bobbin and having a bearing hole corresponding to the upper bearing part; first and second side plates disposed on both sides of the bobbin so that shoulders face inward; first and second permanent magnets disposed corresponding to the first and second side plates; a yoke comprising the first and second side plates, first and second arms that sandwich the first and second permanent magnets, and a bottom plate that connects the arms and has a lower bearing portion formed therein; a movable iron core that swings between shoulders of the first and second side plates around a shaft rotatably supported by the upper bearing portion, the bearing hole, and the lower bearing portion; Mounted said first
or a bistable high-speed control solenoid comprising an adsorbent adsorbed to a shoulder of a second side plate, and configured to have two stable positions at which the movable iron core is adsorbed to the first or second side plate. .