JP2565656B2 - Axial rotation type DC electromagnet - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft rotating type DC electromagnet which repeatedly rotates an output shaft at a predetermined angle by an electromagnetic force.

[0002]

2. Description of the Related Art Generally, a shaft rotating type DC electromagnet (rotary solenoid) repeatedly generates a rotating stroke of a predetermined angle on an output shaft by an electromagnetic force, and is widely used as a power source for various automatic control mechanisms. Has been done.

By the way, as a conventional shaft-rotating DC electromagnet (rotary solenoid), there is one in which a linear motion of a plunger-type electromagnet is mechanically converted into a rotary motion to rotate an output shaft by a predetermined angle ( former).

Further, the ball can be rolled in a case having a solenoid coil housed therein and a plurality of ball races of different depths provided on the concentric circles of the armature provided on the end face side of the case. When the case is inserted, the end face of the case and the armature are brought into contact with each other, and when the solenoid coil is excited, the output shaft attached to the armature is attracted to the base side provided on the case opposite to the armature. There is one that rotates the output shaft by rolling from a place to a deep place, and when the excitation of the solenoid coil is released, the return spring attached to the output shaft causes the output shaft to rotate to the original position (the latter). ).

[0005]

However, in the former type which mechanically converts the rectilinear motion of the plunger into the rotational motion, the connecting mechanism for transmitting the rotational force to the load becomes complicated and the entire structure is also increased. It gets complicated.

In the latter type, in which the output shaft is rotated by the excitation of the solenoid coil against the elastic force of the return spring, the rotational force is reduced by that amount, and the sufficient rotational force cannot be transmitted to the load. There is a problem that it cannot be used for loads that require driving force.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a shaft rotating type DC electromagnet having a simple structure and capable of rotating an output shaft with a large rotational force. .

[0008]

In order to achieve the above-mentioned object, the present invention constitutes a shaft rotating type DC electromagnet by the following means. The invention corresponding to claim 1, a coil, a frame that supports the coil and forms a magnetic circuit of magnetic flux generated from the coil, and an output shaft that is provided by inserting a hollow portion of the coil. A rotary plate attached to the end of the output shaft and one or a plurality of permanent magnets and yokes that are in close contact with the frame corresponding to the outer peripheral side of the rotary plate and that are arranged at appropriate intervals. And a rotary plate stopper provided at a position that restricts the rotation range of the rotary plate and is displaced in the rotational direction from the magnetic neutral point of the permanent magnet and the yoke.

According to a second aspect of the present invention, an output provided by inserting a coil, a frame supporting the coil and forming a magnetic circuit of a magnetic flux generated by the coil, and a hollow portion of the coil. A shaft, a rotary plate attached to the end of the output shaft, and a plurality of magnetic pole faces having different polarities which are closely attached to the frame corresponding to the outer peripheral side of the rotary plate and are arranged at appropriate intervals. It is provided with a plurality of permanent magnets, and a rotary plate stopper provided at a position that restricts the rotation range of the rotary plate and is displaced in the rotational direction from the magnetic neutral point of each permanent magnet.

[0010]

In the shaft rotating type DC electromagnet of the invention according to claim 1, the coil is so arranged that the rotating plate has the same polarity as that of the permanent magnet when the rotating plate is stopped at the permanent magnet position. When energized, the rotary plate is attracted to the yoke side and held at the stop position by the rotary plate stopper, and when the coil is de-energized, the rotary plate is attracted to the permanent magnet side and held at the stop position by the rotary plate stopper.

Therefore, since the rotary plate can be reciprocally rotated between the permanent magnet and the yoke by repeating energization and stop of the coil, the output shaft can be rotated with a large rotational force, and the number of assembled parts can be increased. And since the number of assembling steps is very small, not only the structure is simple, but also the manufacturing is easy.

Further, in the shaft rotating type DC electromagnet of the invention according to claim 2, when the rotating plate is stopped at one permanent magnet position, the polarity of the rotating plate becomes the same as that of the permanent magnet. When the coil is energized instantaneously, the rotary plate is attracted to the other permanent magnet side and held at the stop position by the rotary plate stopper, and the polarity of the rotary plate becomes the same as that of the other permanent magnet. When the coil is momentarily energized again, the rotary plate is attracted to one permanent magnet side and is held at the stop position by the rotary plate stopper.

Therefore, since the rotating plate can be held at some permanent magnet positions without power supply, it is possible to save power, generate no heat due to power supply, and perform instantaneous power supply. Even a small-sized one can pass a relatively large current and can obtain a strong rotational force.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 respectively show configuration examples of a shaft rotation type DC electromagnet according to the present invention. FIG. 1 is a plan view and FIG. 2 is a side view.

In FIGS. 1 and 2, reference numeral 1 denotes a U-shaped frame made of a magnetic material such as iron. Inside this frame 1, bobbins 2 made of synthetic resin having flanges 2a and 2b at both ends are arranged. A coil 3 is attached to the body of the bobbin 2.
Is wrapped around.

This bobbin 2 has a flange 2 at one end.
A rotary plate stopper in which recesses are formed by cutting out the outer peripheral edge of the a-face in a circular arc shape so as to face each other on the frame side, and the flange 2a is projected in a circular arc shape at a position corresponding to one opening side of the frame 1. 4 are formed. A bobbin having such a shape and configuration can be easily obtained by injecting a synthetic resin or the like into a mold and integrally molding.

Further, 5 is installed in one recess of the surface of the flange 2a at one end of the bobbin 2, and the frame 1
The permanent magnet fixed by contacting the inner surface of the corresponding leg of
6 is also installed in the other recess on the surface of the flange 2a,
In addition, the yoke is fixed in contact with the inner surface of the corresponding leg of the frame 1, and the facing surfaces of the permanent magnet 5 and the yoke 6 are formed into arcuate surfaces.

On the other hand, the reference numeral 7 designates an output shaft made of a magnetic material such as iron which is inserted through the hollow portion of the bobbin 2 through a hole provided in the bottom plate of the frame 1. A fan-shaped rotating plate 8 made of a magnetic material such as iron is attached to the end portion protruding outward from the flange 2a at one end with a minute gap between the permanent magnet 5 and the arc surface of the yoke 6.

In this case, the size and position of the rotary plate stopper 4 are set so that the rotation range of the rotary plate 8 is, for example, 120 degrees, and the size of the rotary plate 8 is such that the rotary plate 8 is the rotary plate stopper 4. Permanent magnet 5 when in the stop position by
The magnetic neutral point of the yoke 6 is set so as to be slightly deviated in the rotational direction.

Next, the operation of the shaft rotation type DC electromagnet constructed as described above will be described. Now, the rotating plate 8 is attracted by the magnetic field of the permanent magnet 5 and is stopped and held at the position shown by the rotating plate stopper 4. In this case, if the surface of the permanent magnet 5 facing the rotary plate 8 is the N pole, the flow of the magnetic flux at that time is as shown in FIG.

In such a state, when the coil 3 is energized by a DC power source (not shown) so that the rotating plate 8 is in the N-pole direction, the flow of the magnetic flux is as shown in FIG. The flow is in the opposite direction, and a repulsive force is generated between the rotary plate 8 and the permanent magnet 5. Therefore, the rotating plate 8
Starts rotating toward the yoke 6 side, and at the same time, the coke 6 becomes an S pole due to the magnetic flux flowing through the yoke 6,
Is sucked toward the yoke 6 and stopped and held at the stop position by the rotary plate stopper 4.

Next, when the energization of the coil 3 is stopped, the attraction force between the rotary plate 8 and the yoke 6 becomes zero. At this time, the rotary plate 8 exists within the range of the magnetic force of the permanent magnets 5.
The rotary plate 8 rotates to the permanent magnet 5 side, returns to its original position, and stops.

By repeating such an operation, the rotary plate 8 rotates while reciprocating between the permanent magnet 5 and the yoke 6, and the load can be driven through the output shaft 7. As described above, in this embodiment, the bobbin 2 around which the coil 3 is wound is provided in the frame 1, the rotary plate stopper 4 is provided on the surface of the flange 2a at one end of the bobbin 2, and the permanent magnet 5 and the yoke 6 are provided. Are arranged in contact with the frame 1 so as to face each other, and the rotary plate 8 is attached to the end of the output shaft 7 which is inserted through the body of the bobbin 2, and the rotary plate 8 is made permanent by energizing or stopping the coil 3. Since the magnet 5 and the yoke 6 are reciprocally rotated, the output shaft can be rotated with a large rotational force, and the number of assembling parts and the number of assembling steps are very small, so that the structure is simple. Without
Easy to make. Further, the permanent magnet 5 and the yoke 6 are made to have the same shape, and their mounting positions are interchanged, so that the rotating body 8 can be rotated to the right or left.

Further, in order to set the rotation angle, the required number of fan-shaped rotation plates formed in such a size that the required rotation angle is obtained are prepared, so that other components and materials can be obtained. Since it can be easily assembled without changing, it is extremely effective in terms of stock management of materials and parts when assembling several types of products.

In the above embodiment, one permanent magnet and one permanent magnet are used.
Although the case where the individual yokes are used has been described, a plurality of them may be used in combination depending on the rotation angle and the rotation force.

FIG. 4 is a plan view showing another embodiment of the present invention. The same parts as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. Only different points will be described here. In this embodiment, as shown in FIG. 4, a permanent magnet 9 is provided instead of the yoke 6 of FIG. That is, the rotary plate 8 is formed in one of the indentations on the surface of the flange 2a provided at one end of the bobbin 2.
A permanent magnet 5 having an N pole on the surface facing the and a permanent magnet 9 having an S pole on the surface facing the rotating plate 8 is installed in the other recess of the surface of the flange 2a. Same as 1.

In the shaft rotating type DC electromagnet having such a structure, when the rotating plate 8 is stopped at the position of the N-pole permanent magnet 5, the coil 3 is rotated by the DC power source (not shown) so that the rotating plate 8 is in the N-pole direction. As described above, since a repulsive force is generated between the rotary plate 8 and the permanent magnet 5 as in the above embodiment, the rotary plate 8 rotates toward the S pole permanent magnet 9 side, and at the same time is attracted to the permanent magnet 9. It stops at the stop position by the rotary plate stopper 4.

In this case, even if the energization of the coil 3 is stopped,
Since it is attracted by the S-pole permanent magnet 9, it is held at that position. Next, when the coil 3 is energized so that the rotary plate 8 is oriented in the south pole direction, a repulsive force is generated between the rotary plate 8 and the permanent magnet 9.
At the same time as rotating to the permanent magnet 5 side of the pole, it is attracted by the permanent magnet 5 and stopped at the stop position by the rotary plate stopper 4, and is held at that position.

Therefore, in the shaft-rotating DC electromagnet having such a structure, since the permanent magnets 5 and 9 are held in one of the offsets without being energized, it is possible to save power and to energize. There is no heat generation due to, and since instant energization is sufficient, a relatively large current can flow even with a small one,
A strong torque output can be obtained.

[0030]

As described above, according to the present invention, it is possible to provide a shaft rotating type DC electromagnet having a simple structure and capable of rotating the output shaft with a large rotational force.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a shaft rotation type DC electromagnet according to the present invention.

FIG. 2 is a side view showing the same embodiment.

FIG. 3 is a side view for explaining the action due to the flow of magnetic flux in the same embodiment.

FIG. 4 is a plan view showing another embodiment of the present invention.

[Explanation of symbols]

1 ... Frame, 2 ... Bobbin, 2a, 2b ... Flange, 3 ... Coil, 4 ... Rotating plate stopper, 5, 9 ...
Permanent magnet, 6 ... Yoke, 7 ... Output shaft, 8 ... Rotating plate.

Claims (2)

(57) [Claims] 1. A coil, a frame supporting the coil and forming a magnetic circuit of a magnetic flux generated from the coil, an output shaft provided by inserting a hollow portion of the coil, and an output shaft of the output shaft. A rotary plate attached to the end, one or a plurality of permanent magnets and a yoke, which are closely attached to the frame corresponding to the outer peripheral side of the rotary plate and are arranged at appropriate intervals, A shaft-rotating DC electromagnet, comprising: a rotating plate stopper provided at a position that restricts a rotation range of the plate and is displaced in a rotating direction from a magnetic neutral point of the permanent magnet and the yoke. 2. A coil, a frame supporting the coil and forming a magnetic circuit of magnetic flux generated by the coil, an output shaft provided by inserting a hollow portion of the coil, and an output shaft of the output shaft. A rotary plate attached to an end of the rotary plate; a plurality of permanent magnets having different polarities of magnetic pole faces arranged in close contact with a frame corresponding to the outer peripheral side of the rotary plate and having an appropriate interval; A shaft-rotating DC electromagnet, comprising: a rotary plate stopper provided at a position that restricts a rotation range of the rotary plate and is displaced in a rotational direction from a magnetic neutral point of each permanent magnet.