JP2005217172A - Electromagnetic solenoid device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic solenoid device in which power consumed at the time of the operation of the electromagnetic solenoid device is reduced. <P>SOLUTION: When an exciting current is supplied to an electromagnetic coil 3, magnetic fluxes turning a magnetic circuit B are generated by the electromagnetic coil 3. At the time, to the electromagnetic coil 3, the exciting current controlled so as to generate a large amount of the magnetic fluxes more than the number of the magnetic fluxes of a permanent magnet 4, which are the magnetic fluxes in the opposite direction of the magnetic fluxes of the permanent magnet 4 passing through an iron core 2c in the iron core 2c is supplied. Thus, the magnetic fluxes of the permanent magnet 4 turning the magnetic circuit passing through the iron core 2c are pushed back by the magnetic fluxes of the electromagnetic coil 3 turning the magnetic circuit B and round the magnetic circuit C. As a result, since the composite magnetic fluxes of the magnetic fluxes of the electromagnetic coil 3 and the magnetic fluxes of the permanent magnet 4 pass through a suction 2e from an output shaft 5 and magnetic attraction force larger than the elastic force of a coil spring 6 is generated by the composite magnetic fluxes, the output shaft 5 is moved to the side of the suction 2e against the elastic force of the coil spring 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electromagnetic solenoid device.

  Conventionally, there is an electromagnetic solenoid device that is operated by electromagnetic force as disclosed in Patent Document 1. The electromagnetic solenoid device disclosed in Patent Document 1 includes a casing, an electromagnetic coil, a yoke, a fixed iron core, a mover provided with a shaft, a spring, and two bearings that support the shaft. I have. The casing is formed in a cylindrical shape from a magnetic metal material, and an opening at the upper end and the lower end is provided with an annular portion extending radially inward from the opening. The electromagnetic coil is formed in a cylindrical shape and is accommodated in the casing. Further, a cylindrical yoke is inserted into the electromagnetic coil from the upper side, and a cylindrical fixed iron core is inserted from the lower side. Each of the yoke and the fixed iron core is provided with a flange, and covers both ends of the electromagnetic coil. Each flange portion is in contact with the casing on the outer side in the radial direction. A mover is accommodated in the yoke so as to be movable up and down. The mover is urged upward by a spring loosely inserted into the fixed iron core, and a predetermined interval is provided between the mover and the fixed iron core. Bearings are provided at the upper part of the yoke and the lower part of the fixed iron core, and support the shaft provided in the mover so as to be movable up and down.

In the electromagnetic solenoid device configured as described above, when an excitation current is supplied to the electromagnetic coil, the magnetic flux generated by the electromagnetic coil is a magnetic force formed by the yoke, the mover, the fixed iron core, and the casing. In order to go around the circuit, a magnetic attractive force toward the fixed iron core acts on the mover. The mover provided with the shaft moves downward, that is, toward the fixed iron core against the elastic force of the spring by this magnetic attraction. When the supply of the excitation current to the electromagnetic coil is stopped, no magnetic flux is generated and the magnetic attractive force does not work. Therefore, the mover moves upward, that is, on the yoke side by the elastic force of the spring and returns to the original position.
Japanese Patent Laid-Open No. 9-42906

  Here, in the electromagnetic solenoid device disclosed in Patent Document 1, a large amount of magnetic flux is required to obtain a large amount of movement. As a result, a large excitation current must be supplied, resulting in an increase in power consumption. In addition, in the case of using for the purpose of maintaining the position, the excitation current must be continuously supplied in order to keep the movable element moved from the original position, so that the power consumption also increases in this case. . Therefore, as described above, the electromagnetic solenoid device disclosed in Patent Document 1 has a problem that power consumption becomes large when the electromagnetic solenoid device is operated.

  The present invention has been made in view of such circumstances, and an object thereof is to provide an electromagnetic solenoid device capable of reducing the electric power consumed when the electromagnetic solenoid device is operated.

  In order to solve the above-mentioned problem, an invention according to claim 1 is directed to an output shaft made of a magnetic material and moved by magnetic attraction, a holding portion that holds the output shaft so as to be movable, and the output shaft. A solenoid body made of a magnetic body having a suction portion that attracts the output shaft by magnetic attraction, and a part of the solenoid body that is inserted through the solenoid body and the inside of the solenoid body and the output An electromagnetic solenoid device comprising: an electromagnetic coil that forms a magnetic circuit that passes through the shaft; and an elastic member that biases the output shaft in a direction that opposes the magnetic attraction between the output shaft and the attracting portion. A permanent magnet disposed so as to form a magnetic circuit passing through the interior of the solenoid body, and the magnetism of the permanent magnet is the solenoid when the electromagnetic coil is de-energized. A first magnetic circuit that passes through the inside of the electromagnetic coil is formed in the main body, and when the electromagnetic coil is energized, a combined magnetic flux of the magnetic flux of the electromagnetic coil and the magnetic flux of the permanent magnet passes through the output shaft. A second magnetic circuit is formed, and a magnetic attractive force exceeding the elastic force of the elastic member is generated by the combined magnetic flux, and the output shaft is moved to the attraction portion side.

  According to a second aspect of the present invention, in the electromagnetic solenoid device according to the first aspect, the output shaft can be brought into contact with the suction portion, and the magnetic flux of the permanent magnet can be obtained when the electromagnetic coil is not energized. Is formed so as to keep the output shaft in contact with the attraction portion by the magnetic attractive force generated by the.

  According to a third aspect of the present invention, in the electromagnetic solenoid device according to the first aspect, the output shaft can be brought into contact with the suction portion, and the solenoid body has a gap in the first magnetic circuit. It is formed so as to keep the output shaft in contact with the attracting portion by a magnetic attractive force generated by the magnetic flux of the permanent magnet when the electromagnetic coil is not energized.

According to a fourth aspect of the present invention, in the electromagnetic solenoid device according to the third aspect, the gap is straddled by the electromagnetic coil.
According to a fifth aspect of the present invention, in the electromagnetic solenoid device according to the second to fourth aspects, the electromagnetic coil forms a magnetic circuit in the same direction as a magnetic circuit passing through the output shaft of the permanent magnet. A first electromagnetic coil and a second electromagnetic coil that forms a magnetic circuit in a direction different from a magnetic circuit passing through the output shaft of the permanent magnet, and when the first electromagnetic coil is energized, A magnetic flux generated by a magnetic flux of one electromagnetic coil and a magnetic flux of the permanent magnet forms the second magnetic circuit passing through the output shaft, and a magnetic attractive force exceeding the elastic force of the elastic member is generated by the combined magnetic flux. The output shaft is moved to the attraction portion side, and the magnetic flux of the permanent magnet passing through the output shaft and the first magnet in the state where the output shaft is in contact with the attraction portion when the second electromagnetic coil is energized. 2 Magnetic attraction by synthesis flux between the magnetic flux of the magnetic coil is weaker than the elastic force of the elastic member, which is formed to move the output shaft to the opposite suction side by the elastic force of the elastic member.

(Function)
According to the first aspect of the present invention, not only the magnetic flux of the electromagnetic coil but also the combined magnetic flux of the magnetic flux of the electromagnetic coil and the magnetic flux of the permanent magnet forms the second magnetic circuit that passes through the output shaft. It is possible to reduce the magnetic flux generated by the electromagnetic coil in order to move it toward the suction part. Therefore, the electric power consumed by the electromagnetic coil can be reduced, and as a result, the electric power consumed when the electromagnetic solenoid device is operated is reduced.

  According to the second aspect of the present invention, when the electromagnetic coil is not energized, the magnetic shaft that generates the magnetic flux of the permanent magnet maintains the state where the output shaft is moved to the attraction portion side even when it is not energized. Can do. Therefore, it is possible to maintain a state where the output shaft is moved to the suction unit side without consuming electric power.

  According to the third aspect of the present invention, since the gap is formed in the first magnetic circuit, the magnetic flux of the permanent magnet can be obtained when the output shaft is in contact with the attracting portion when the electromagnetic coil is not energized. Does not go around the first magnetic circuit where the magnetic resistance is large because a gap is formed in the solenoid body, but all passes through the output shaft in contact with the suction portion. Accordingly, when the electromagnetic coil is not energized, the state where the output shaft is moved to the suction portion side can be maintained more reliably than the electromagnetic solenoid device in which no gap is formed in the solenoid body.

According to the invention described in claim 4, since the gap is straddled by the electromagnetic coil, the constant interval is stably maintained.
According to the fifth aspect of the present invention, the first electromagnetic coil and the second electromagnetic coil form magnetic circuits in different directions. In the case where the output shaft is moved to the suction portion side and the case where the output shaft is moved to the opposite suction portion side, it is necessary to form a magnetic circuit in the opposite direction by the electromagnetic coil, so only one electromagnetic coil is provided. If the electromagnetic solenoid device is not, the excitation current must be controlled to form a magnetic circuit in the reverse direction. However, in the invention according to claim 4, since the first electromagnetic coil and the second electromagnetic coil are provided, whether the excitation current is supplied to the first electromagnetic coil or the excitation current is supplied to the second electromagnetic coil. Thus, magnetic circuits in different directions can be formed only by switching the supply destination of the excitation current, and the output shaft can be easily controlled.

  ADVANTAGE OF THE INVENTION According to this invention, the electromagnetic solenoid apparatus with which the electric power consumed at the time of the action | operation of an electromagnetic solenoid apparatus is reduced can be provided.

(First embodiment)
A first embodiment embodying the present invention will be described below with reference to FIGS.
As shown in FIG. 1, the electromagnetic solenoid device 1 includes a solenoid body 2, an electromagnetic coil 3, a permanent magnet 4, an output shaft 5, and a coil spring 6 as an elastic member.

  The solenoid body 2 is made of a magnetic material and includes an upper member 2a and a lower member 2b. The upper member 2a and the lower member 2b are formed so as to extend in parallel, and are connected to each other by an iron core portion 2c formed integrally with the upper member 2a and the lower member 2b. Further, the other end of the upper member 2a is provided with a holding portion 2d for holding the output shaft 5 movably, and the other end of the lower member 2b is formed integrally with the lower member 2b. A suction portion 2e that protrudes from the lower member 2b toward the upper member 2a and faces the holding portion 2d is provided.

  In addition, magnet holding portions 2f and 2g are provided projecting toward the respective members at the intermediate portion between the upper member 2a and the lower member 2b, and a predetermined distance is provided between the tip portions of the magnet holding portions 2f and 2g. A gap is formed. A permanent magnet 4 is disposed in the gap between the magnet holding portions 2f and 2g. The permanent magnet 4 is formed such that the length of the internal magnetic flux (direction from the S pole to the N pole) is equal to the length between the two magnet holding portions 2f and 2g, and the two magnetic poles are respectively magnet holding portions 2f and 2g. It is in contact with. In the present embodiment, the N pole of the permanent magnet 4 is in contact with the magnet holding portion 2f of the upper member 2a, and the S pole of the permanent magnet 4 is in contact with the magnet holding portion 2g of the lower member 2b. The magnetic flux of the permanent magnet 4 enters the solenoid body 2 from the N pole, forms a magnetic circuit that passes through the inside of the solenoid body 2 and returns to the S pole of the permanent magnet 4.

  A cylindrical electromagnetic coil 3 is provided on the outer periphery of the iron core portion 2c so that the iron core portion 2c is inserted therethrough. The electromagnetic coil 3 includes an insulator 3d including a cylindrical portion 3a through which the iron core portion 2c passes and flanges 3b and 3c extending outward from both ends of the cylindrical portion, and a cylindrical portion 3a of the insulator 3d. The winding 3e is wound around. When an excitation current is supplied from an external power source, the electromagnetic coil 3 generates a magnetic flux in a direction corresponding to the direction of the supplied excitation current in the iron core portion 2 c and passes through the solenoid body 2 and the output shaft 5. A magnetic circuit is formed.

  A holding hole 7 is formed in the holding portion 2d, and the output shaft 5 made of a magnetic material is movably inserted. The inner peripheral surface of the holding hole 7 is covered with a cylindrical holding member 8 made of a non-magnetic material (brass, synthetic resin, etc.). Since both the output shaft 5 and the solenoid body 2 are made of a magnetic material, an exciting current is supplied to the electromagnetic coil 3 to form a magnetic circuit that passes through the output shaft 5 and the solenoid body 2 to generate a magnetic attractive force. Then, a sticking force is generated on the sliding surface between the holding hole 7 and the output shaft 5. Even after the supply of the excitation current to the electromagnetic coil 3 is stopped, a part of this fixing force remains. Since the remaining sticking force prevents the output shaft 5 from moving, the holding member 8 is provided on the inner peripheral surface of the holding hole 7 which is a sliding surface between the output shaft 5 and the holding member 8, so that the influence of the sticking force is reduced. This reduces the movement of the output shaft 5.

  At both axial ends of the output shaft 5, flange portions 5 a and 5 b are provided extending outward from the end portions. A compressed coil spring 6 as an elastic member is provided between the upper flange portion 5a of the output shaft 5 and the upper member 2a. The coil spring 6 connects the flange portion 5a of the output shaft 5 to the suction portion. It is energizing in the direction away from 2e (upward in the figure). The flange portion 5b engages with the holding portion 2d when the output shaft 5 moves upward, and prevents further movement of the output shaft 5. Thus, the output shaft 5 is held by the coil spring 6 so as to be spaced apart from the suction portion 2e. In addition, the elastic force of the coil spring 6 is smaller than the magnetic attractive force generated by the magnetic flux that goes around the magnetic circuit C described later.

  In the suction portion 2 e, the upper end surface facing the output shaft 5 is covered with a contact member 9 made of a nonmagnetic material similar to the holding member 8. The abutting member 9 functions in the same manner as the holding member 8, and after the supply of excitation current is stopped, the output shaft 5 is attracted to the suction portion 2e by the fixing force acting between the output shaft 5 and the suction portion 2e. Thus, the output shaft 5 can be easily moved.

Next, the operation of the electromagnetic solenoid device 1 configured as described above will be described.
As shown in FIG. 1, when the output shaft 5 is held on the side opposite to the suction portion 2e by the elastic force of the coil spring 6 and no excitation current is supplied to the electromagnetic coil 3, the output shaft 5 is connected to the suction portion 2e. Between the output body 5 and the output shaft 5, the magnetic resistance between the output shaft 5 and the attracting portion 2 e is the largest. Accordingly, the magnetic circuit of the permanent magnet 4 is a magnetic circuit as a first magnetic circuit that extends from the N pole to the S pole through the magnet holding portion 2f, the upper member 2a, the iron core portion 2c, the lower member 2b, and the magnet holding portion 2g. A is formed.

  As shown in FIG. 2, when an excitation current is supplied to the electromagnetic coil 3, a magnetic flux is generated in the iron core 2 c by the electromagnetic coil 3. The direction of the generated magnetic flux is the direction from the lower member 2b toward the upper member 2a, similarly to the direction of the magnetic flux of the permanent magnet 4. Further, the number of magnetic fluxes generated by the electromagnetic coil 3 is larger than that of the permanent magnet 4. The magnetic flux generated by the electromagnetic coil 3 passes through the magnetic circuit B as the second magnetic circuit from the iron core portion 2c to the iron core portion 2c again through the upper member 2a, the output shaft 5, the suction portion 2e, and the lower member 2b. Form. Accordingly, the magnetic flux of the permanent magnet 4 that has traveled around the magnetic circuit A is pushed back by the magnetic flux of the electromagnetic coil 3 that travels around the magnetic circuit B, and from the N pole, the magnet holding portion 2f, the upper member 2a, the output shaft 5, and the attracting portion. 2e, the magnet holding part 2g, and the magnetic circuit C as a 2nd magnetic circuit which goes to the south pole through the lower member 2b is formed. As a result, a combined magnetic flux of the magnetic coil 3 and the permanent magnet 4 passes from the output shaft 5 through the attracting portion 2e, and a magnetic attractive force larger than the elastic force of the coil spring 6 is generated by the combined magnetic flux. Therefore, the output shaft 5 is moved toward the suction portion 2e against the elastic force of the coil spring 6. The output shaft 5 comes into contact with the suction portion 2e through the contact member 9.

  Next, when the supply of the excitation current to the electromagnetic coil 3 is stopped, no magnetic flux is generated from the electromagnetic coil 3 as shown in FIG. In the state where the output shaft 5 is in contact with the attracting portion 2e via the contact member 9, there is no portion having a particularly large magnetic resistance in the solenoid body 2 and the output shaft 5, so that part of the magnetic flux of the permanent magnet 4 is The magnetic circuit C that has been turned when the electromagnetic coil 3 is energized goes around the magnetic circuit A, and the remaining magnetic flux goes around the magnetic circuit A that has been turned before the energization. Since the elastic force of the coil spring 6 is smaller than the magnetic attractive force generated by the magnetic flux of the permanent magnet 4 that rotates around the magnetic circuit C, the output shaft 5 remains in contact with the attracting portion 2e via the contact member 9. Retained.

  To return from the state where the output shaft 5 is in contact with the holding portion 2d when the electromagnetic coil 3 is not energized as shown in FIG. 3 to the state where the output shaft 5 shown in FIG. An exciting current is supplied to the coil 3. At this time, the electromagnetic coil 3 includes a magnetic flux opposite to the magnetic flux of the permanent magnet 4 turning around the magnetic circuit C and the magnetic flux of the permanent magnet 4 turning around the magnetic circuit C in the output shaft 5 and the attracting part 2e. An exciting current is supplied that is controlled so as to generate an amount of magnetic flux such that the elastic force of the coil spring 6 is greater than the magnetic attractive force generated by the combined magnetic flux with the generated magnetic flux. As a result, the output shaft 5 is moved to the anti-suction part 2e side by the elastic force of the coil spring 6.

As described above, the present embodiment has the following effects.
(1) Since the magnetic circuit C in which the magnetic flux of the permanent magnet 4 passes through the output shaft 5 is formed, the magnetic flux generated by the electromagnetic coil 3 to move the output shaft 5 toward the attracting portion 2e can be reduced. Therefore, the power consumed by the electromagnetic coil 3 can be reduced. As a result, the power consumed when the electromagnetic solenoid device 1 operates can be reduced.

  (2) In a state where the output shaft 5 is in contact with the attracting portion 2e when the electromagnetic coil 3 is not energized, the elastic force of the coil spring 6 is a magnetic attractive force generated by the magnetic flux of the permanent magnet 4 that goes around the magnetic circuit C. Therefore, the state where the output shaft 5 is moved to the suction portion 2e side can be maintained even when no power is supplied. Therefore, the state where the output shaft 5 is moved to the suction part 2e side can be maintained without consuming electric power.

  (3) Not only the magnetic flux generated by energizing the electromagnetic coil 3 but also the magnetic attractive force acting on the output shaft 5 is generated using the magnetic flux of the permanent magnet 4. Therefore, since it is easier to obtain a larger amount of magnetic flux than an electromagnetic solenoid device using only the electromagnetic coil 3, an increase in power consumption can be suppressed even when the amount of movement of the output shaft 5 is large.

(Second Embodiment)
A second embodiment embodying the present invention will be described below with reference to FIGS. In addition, about the structure similar to the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIG. 4 shows the electromagnetic solenoid device 20 of this embodiment. The electromagnetic solenoid device 20 includes a solenoid body 21. The solenoid body 21 includes an upper member 2a and a lower member 2b, and iron core portions 22a and 22b are integrally formed with the end portions of the upper member 2a and the lower member 2b. Both iron core portions 22a and 22b project from each other toward the other members 2b and 2a, and their tips are opposed to each other, and a gap 23 of a predetermined interval is formed between the tips of both iron core portions 22a and 22b. . The gap 23 is formed to be narrower than the interval between the output shaft 5 and the suction portion 2e in a state where the output shaft 5 is held on the side opposite to the suction portion 2e. Further, the gap 23 is formed by the magnetic flux of the permanent magnet 4 when the output shaft 5 is held on the side opposite to the attraction portion 2e by the elastic force of the coil spring 6 and no excitation current is supplied to the electromagnetic coil 3. It is formed in the magnetic circuit E as the first magnetic circuit. Further, the gap 23 is straddled by the electromagnetic coil 3.

  The elastic force of the coil spring 24 as an elastic member that urges the output shaft 5 toward the anti-suction portion 2e is generated by the magnetic flux of the permanent magnet 4 that rotates around a magnetic circuit G (see FIG. 5) as a second magnetic circuit described later. Is smaller than the magnetic attraction.

  In the present embodiment, the contact member 9 that covers the upper end surface of the suction portion 2e in the electromagnetic solenoid device 1 of the first embodiment is not provided. In this embodiment, the contact member 9 may be provided. In this case, the thickness of the contact member 9 in the axial direction of the output shaft 5 is made thinner than the gap 23.

The operation of the electromagnetic solenoid device 20 configured as described above will be described.
As shown in FIG. 4, the output shaft 5 is held on the side opposite to the attraction portion 2e by the elastic force of the coil spring 6, and the solenoid coil 21 and the output shaft are not energized when no excitation current is supplied to the electromagnetic coil 3. 5, the magnetic resistance in the gap 23 is smaller than the magnetic resistance between the output shaft 5 and the attracting part 2e. Accordingly, the magnetic flux of the permanent magnet 4 forms a magnetic circuit E from the N pole to the S pole through the magnet holding portion 2f, the upper member 2a, the iron core portions 22a and 22b, the lower member 2b, and the magnet holding portion 2g. .

  As shown in FIG. 5, when an exciting current is supplied to the electromagnetic coil 3, a magnetic flux is generated in the iron core portions 22 a and 22 b by the electromagnetic coil 3. The direction of the generated magnetic flux is the direction from the lower member 2b toward the upper member 2a, similarly to the direction of the magnetic flux of the permanent magnet 4. Further, the number of magnetic fluxes generated by the electromagnetic coil 3 is larger than that of the permanent magnet 4. The magnetic flux generated by the electromagnetic coil 3 forms a magnetic circuit F as a second magnetic circuit from the iron core portion 22a to the iron core portion 22b through the upper member 2a, the output shaft 5, the suction portion 2e, and the lower member 2b. To do. Accordingly, the magnetic flux of the permanent magnet 4 that has traveled around the magnetic circuit E is pushed back by the magnetic flux of the electromagnetic coil 3 that travels around the magnetic circuit F, and from the N pole, the magnet holding portion 2f, the upper member 2a, the output shaft 5, and the suction portion. 2e, the lower member 2b, the magnet holding part 2g, and the magnetic circuit G which reaches to an S pole is formed. As a result, a combined magnetic flux of the magnetic coil 3 and the permanent magnet 4 passes from the output shaft 5 through the attracting portion 2e, and a magnetic attractive force larger than the elastic force of the coil spring 6 is generated by the combined magnetic flux. Therefore, the output shaft 5 is moved toward the suction portion 2e against the elastic force of the coil spring 6. And the output shaft 5 contacts the suction part 2e.

  Next, when the supply of the excitation current to the electromagnetic coil 3 is stopped, no magnetic flux is generated from the electromagnetic coil 3. In the state where the output shaft 5 is in contact with the suction portion 2e, the magnetic resistance in the gap 23 in the solenoid body 21 and the output shaft 5 is the largest, so that the magnetic flux of the permanent magnet 4 is applied when the electromagnetic coil 3 is energized. Continue to rotate around the magnetic circuit G. At this time, since the elastic force of the coil spring 24 is smaller than the magnetic attractive force generated by the magnetic flux of the permanent magnet 4 that rotates around the magnetic circuit G, the output shaft 5 is held in contact with the attracting portion 2e.

  In order to return the output shaft 5 in contact with the suction part 2e to the state held on the side opposite to the suction part 2e shown in FIG. 4, an excitation current is supplied to the electromagnetic coil 3 as shown in FIG. Thus, the magnetic circuit H is formed. The magnetic circuit H extends from the iron core portion 22b to the iron core portion 22a through the lower member 2b, the suction portion 2e, the output shaft 5, and the upper member 2a. At this time, the electromagnetic coil 3 includes a magnetic flux opposite to the magnetic flux of the permanent magnet 4 that rotates around the magnetic circuit G in the output shaft 5 and the attracting portion 2e, and the magnetic flux generated by the electromagnetic coil 3 and the magnetic flux generated by the electromagnetic coil 3. An exciting current controlled to generate an amount of magnetic flux such that the elastic force of the coil spring 24 is larger than the magnetic attractive force generated by the combined magnetic flux is supplied. As a result, the output shaft 5 is moved by the elastic force of the coil spring 6 to the side opposite to the suction portion 2e shown by a two-dot chain line in FIG.

As described above, according to the present embodiment, in addition to the effects (1) and (3) of the first embodiment, the following effects are also obtained.
(1) When the output shaft 5 is in contact with the attracting portion 2e when the electromagnetic coil 3 is not energized, the elastic force of the coil spring 24 is a magnetic attractive force generated by the magnetic flux of the permanent magnet 4 that goes around the magnetic circuit G. Therefore, the state where the output shaft 5 is moved to the suction portion 2e side can be maintained even when no power is supplied. Therefore, the state where the output shaft 5 is moved to the suction part 2e side can be maintained without consuming electric power.

  (2) Since the gap 23 is formed in the magnetic circuit E, the magnetic flux of the permanent magnet 4 is applied to the solenoid body 2 in a state where the output shaft 5 is in contact with the attracting portion 2e when the electromagnetic coil 3 is not energized. The magnetic circuit E in which the gap 23 is formed is not rotated, and the magnetic circuit G that passes through the output shaft 5 that is in contact with the suction portion 2e is rotated. Therefore, when the electromagnetic coil 3 is not energized, the output shaft 5 is moved to the suction portion 2e side more reliably than the electromagnetic solenoid device 1 of the first embodiment in which the gap 23 is not formed in the solenoid body 2. Can be kept.

  (3) When the winding 3e is wound, the cylindrical portion 3a of the insulator 3d is pressed toward the core portions 22a and 22b by the winding 3e, so that the core portions 22a and 22b are stably held. As a result, the gap 23 formed by the iron core portions 22a and 22b and straddled by the electromagnetic coil 3 is stably maintained at a constant interval.

(Third embodiment)
Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. In addition, about the structure similar to the said 1st and 2nd embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIG. 7 shows the electromagnetic solenoid device 30 of this embodiment. A cylindrical electromagnetic coil 31 is provided on the outer periphery of the iron core portions 22a and 22b so that the iron core portions 22a and 22b are inserted therethrough. The electromagnetic coil 31 includes a first electromagnetic coil 32 and a second electromagnetic coil 33 arranged in parallel along the axial direction. The electromagnetic coil 31 includes an insulator 31a. The insulator 31a includes a cylindrical portion 31b through which the iron core portions 22a and 22b are penetrated, a flange portion 31c extending outward at an intermediate portion in the axial direction of the cylindrical portion 31b, and outward from both ends of the cylindrical portion 31b. It is comprised from the collar parts 31d and 31e extended. And the 1st electromagnetic coil 32 is wound by the cylinder part 31b pinched by the collar part 31c and the upper collar part 31d, and the cylinder part 31b pinched | interposed by the collar part 31c and the lower collar part 31e. A second electromagnetic coil 33 is wound around the coil.

  Further, the first electromagnetic coil 32 and the second electromagnetic coil 33 are different from each other in the winding direction of the wound winding. Therefore, when an excitation current is supplied to the first electromagnetic coil 32, the upper member 2a, the output shaft 5, the suction portion 2e, and the lower member 2b are moved from the iron core portion 22a by the first electromagnetic coil 32 as shown in FIG. Magnetic flux is generated that forms a magnetic circuit K as a second magnetic circuit that passes through and reaches the iron core 22b. When an excitation current similar to the excitation current supplied to the first electromagnetic coil 32 is supplied to the second electromagnetic coil 33, as shown in FIG. Magnetic flux is generated that forms a magnetic circuit M that reaches the iron core portion 22a through the member 2b, the suction portion 2e, the output shaft 5, and the upper member 2a. Further, as shown in FIG. 8, the magnetic flux generated by the first electromagnetic coil 32 is, in the iron core portions 22a and 22b, the magnetic circuit L (from the N pole, the magnet holding portion 2f and the upper member 2a as the second magnetic circuit). , Opposite to the magnetic flux of the permanent magnet 4 that passes through the output shaft 5, the suction portion 2e, the lower member 2b, and the magnet holding portion 2g and reaches the S pole), and is larger than the number of magnetic fluxes of the permanent magnet. Further, the magnetic flux generated by the second electromagnetic coil 33 is opposite to the magnetic flux of the permanent magnet 4 that rotates around the magnetic circuit L in the output shaft 5 and the suction portion 2e in a state where the output shaft 5 is in contact with the suction portion 2e. In addition, by combining with the magnetic flux of the permanent magnet 4, the magnetic attractive force due to the magnetic flux of the permanent magnet 4 is weaker than the elastic force of the coil spring 24.

  In addition, the gap 23 formed by the iron core portions 22a and 22b is such that the output shaft 5 is held on the side opposite to the suction portion 2e by the elastic force of the coil spring 6, and both of the first electromagnetic coil 32 and the second electromagnetic coil 33 are used. It is formed in the magnetic circuit J as the first magnetic circuit formed by the magnetic flux of the permanent magnet 4 when no excitation current is supplied. Further, the gap 23 is straddled by the electromagnetic coil 31.

In the present embodiment, similarly to the second embodiment, the electromagnetic solenoid device 1 of the first embodiment is not provided with the contact member 9 covering the upper end surface of the suction part 2e.
The operation of the electromagnetic solenoid device 30 configured as described above will be described.

  As shown in FIG. 7, the output shaft 5 is held on the side opposite to the suction portion 2 e by the elastic force of the coil spring 6, and no excitation current is supplied to either the first electromagnetic coil 32 or the second electromagnetic coil 33. During energization, the magnetic resistance in the gap 23 is smaller in the solenoid body 21 and in the output shaft 5 than in the magnetic resistance between the output shaft 5 and the suction portion 2e. Therefore, the magnetic flux J of the permanent magnet 4 forms a magnetic circuit J from the N pole to the S pole through the magnet holding portion 2f, the upper member 2a, the iron core portions 22a and 22b, the lower member 2b, and the magnet holding portion 2g. .

  As shown in FIG. 7, when an excitation current is supplied to the first electromagnetic coil 32, a magnetic flux that forms the magnetic circuit K is generated by the first electromagnetic coil 32. The generated magnetic flux is in a direction from the lower member 2b toward the upper member 2a in the same manner as the direction of the magnetic flux of the permanent magnet 4. Further, the number of magnetic fluxes generated by the first electromagnetic coil 32 is larger than that of the permanent magnet 4. Accordingly, the magnetic flux of the permanent magnet 4 that has traveled around the magnetic circuit J is pushed back by the magnetic flux of the first electromagnetic coil 32 that travels around the magnetic circuit K, and from the north pole, the magnet holding portion 2f, the upper member 2a, the output shaft 5, A magnetic circuit L that reaches the south pole through the suction part 2e, the lower member 2b, and the magnet holding part 2g is formed. As a result, a combined magnetic flux of the magnetic flux of the first electromagnetic coil 32 and the magnetic flux of the permanent magnet 4 passes from the output shaft 5 through the attracting portion 2e, and a magnetic attractive force larger than the elastic force of the coil spring 6 is generated by this combined magnetic flux. Therefore, the output shaft 5 is moved toward the suction portion 2e against the elastic force of the coil spring 24. And the output shaft 5 contacts the suction part 2e.

  Next, when the supply of the excitation current to the first electromagnetic coil 32 is stopped, no magnetic flux is generated from the first electromagnetic coil 32. In the state where the output shaft 5 is in contact with the suction portion 2e, the magnetic resistance in the gap 23 in the solenoid body 21 and the output shaft 5 is the largest, so that the magnetic flux of the permanent magnet 4 is applied to the first electromagnetic coil 32. The magnetic circuit L continues to be rotated as in the case of energization. At this time, since the elastic force of the coil spring 24 is smaller than the magnetic attractive force generated by the magnetic flux of the permanent magnet 4 that rotates around the magnetic circuit L, the output shaft 5 is held in contact with the attracting portion 2e. .

  In order to return the output shaft 5 in contact with the suction part 2e to the state held on the side opposite to the suction part 2e shown in FIG. 7, an excitation current is applied to the second electromagnetic coil 33 as shown in FIG. The magnetic circuit M is formed by supplying. At this time, the second electromagnetic coil 33 is generated in the output shaft 5 and the attracting portion 2e with a magnetic flux opposite to the magnetic flux of the permanent magnet 4 that circulates the magnetic circuit L, and the magnetic flux of the permanent magnet 4 and the second electromagnetic coil 33 are generated. The magnetic flux is generated such that the elastic force of the coil spring 24 is larger than the magnetic attractive force generated by the combined magnetic flux with the magnetic flux to be generated. As a result, due to the elastic force of the coil spring 24, the output shaft 5 is moved to the side opposite to the suction portion 2e indicated by a two-dot chain line in FIG.

As described above, according to the present embodiment, in addition to the effects (1) and (3) of the first embodiment, the following effects are also obtained.
(1) When the output shaft 5 is in contact with the attracting portion 2e when the first electromagnetic coil 32 and the second electromagnetic coil 33 are not energized, the elastic force of the coil spring 24 is applied to the permanent magnet 4 that rotates around the magnetic circuit L. Since it is smaller than the magnetic attractive force generated by the magnetic flux, the output shaft 5 can be kept in the state of being moved toward the attracting part 2e even when no current is applied. Therefore, the state where the output shaft 5 is moved to the suction part 2e side can be maintained without consuming electric power.

  (2) Since the gap 23 is formed in the magnetic circuit J, the magnetic flux of the permanent magnet 4 is applied to the solenoid body 2 in a state where the output shaft 5 is in contact with the attracting portion 2e when the electromagnetic coil 31 is not energized. In FIG. 5, the magnetic circuit J in which the gap 23 is formed is not rotated, but the magnetic circuit L that passes through the output shaft 5 that is in contact with the suction portion 2e is rotated. Therefore, when the electromagnetic coil 31 is not energized, the output shaft 5 is moved to the suction portion 2e side more reliably than the electromagnetic solenoid device 1 of the first embodiment in which the gap 23 is not formed in the solenoid body 2. Can be kept.

  (3) The first electromagnetic coil 32 and the second electromagnetic coil 33 form magnetic circuits in different directions. When the output shaft 5 is moved to the suction portion 2e side and when the output shaft 5 is moved to the anti-attraction portion 2e side, it is necessary to form magnetic circuits in opposite directions by the electromagnetic coil. Therefore, in the electromagnetic solenoid devices 1 and 20 according to the first and second embodiments having only one electromagnetic coil 3, the exciting current is controlled so that the magnetic circuits B and F and the magnetic circuits H and M in the opposite directions are arranged. Must be formed. However, since the electromagnetic solenoid device 30 of the present embodiment includes the first electromagnetic coil 32 and the second electromagnetic coil 33, an excitation current is supplied to the first electromagnetic coil 32 or the second electromagnetic coil 33 is excited. Different magnetic circuits K and M can be formed only by switching the excitation current supply destination, ie, whether to supply current, and the output shaft 5 can be easily controlled.

  (4) When the first electromagnetic coil 32 and the second electromagnetic coil 33 are wound around the cylindrical portion 31b of the insulator 31a, the cylindrical portion 31b is moved to the iron core portions 22a and 22b side by the first electromagnetic coil 32 and the second electromagnetic coil 33. Therefore, the iron core portions 22a and 22b are stably held. As a result, the gap 23 formed by the iron core portions 22a and 22b and straddling the electromagnetic coil 31 is stably maintained at a constant interval.

Each embodiment of the present invention may be modified as follows.
In the first embodiment, the output shaft 5 contacts the suction unit 2e when moved to the suction unit 2e side, but may be configured not to contact. In this case, when the supply of the excitation current to the electromagnetic coil 3 is stopped, the magnetic flux of the permanent magnet 4 rotates around the magnetic circuit A shown in FIG. Moved to the side.

  In the first embodiment, the elastic force of the coil spring 6 is smaller than the magnetic attractive force generated by the magnetic flux of the permanent magnet 4 that rotates around the magnetic circuit C as shown in FIG. It may be formed. In this case, when the supply of the excitation current to the electromagnetic coil 3 is stopped, the output shaft 5 is moved to the anti-suction part 2e side by the elastic force of the coil spring 6.

  In the second and third embodiments, the gap 23 is straddled by the electromagnetic coils 3, 31, but may be configured not to straddle. In that case, the gap 23 is formed in the magnetic circuit E in the second embodiment and in the magnetic circuit J in the third embodiment.

In the first embodiment, the electromagnetic coil 3 may be changed to the electromagnetic coil 31 of the third embodiment.
The technical idea that can be grasped from each of the above embodiments will be described below.

  (A) The electromagnetic solenoid device according to claim 2, wherein a part of the magnetic flux of the permanent magnet is the output shaft in a state where the output shaft is in contact with the attracting portion when the electromagnetic coil is not energized. The electromagnetic solenoid device is characterized in that an elastic force of the elastic member is formed to be smaller than a magnetic attractive force due to a part of the magnetic flux of the permanent magnet.

  (B) The electromagnetic solenoid device according to claim 3 or 4, wherein, in the solenoid body, the portion where the electromagnetic coil is inserted is connected to the output shaft when the electromagnetic coil is not energized. The magnetic flux of the permanent magnet forms a magnetic circuit that passes through the output shaft in the state of contact with the attracting portion, and the elastic force of the elastic member is smaller than the magnetic attractive force due to the magnetic flux of the permanent magnet. An electromagnetic solenoid device characterized in that the electromagnetic solenoid device is formed.

Sectional drawing which shows the electromagnetic solenoid of 1st Embodiment. Sectional drawing which shows operation | movement of the electromagnetic solenoid of 1st Embodiment. Sectional drawing which shows operation | movement of the electromagnetic solenoid of 1st Embodiment. Sectional drawing of the electromagnetic solenoid of 2nd Embodiment. Sectional drawing which shows operation | movement of the electromagnetic solenoid of 2nd Embodiment. Sectional drawing which shows operation | movement of the electromagnetic solenoid of 2nd Embodiment. Sectional drawing which shows the electromagnetic solenoid of 3rd Embodiment. Sectional drawing which shows operation | movement of the electromagnetic solenoid of 3rd Embodiment. Sectional drawing which shows operation | movement of the electromagnetic solenoid of 3rd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2,21 ... Solenoid main body, 2d ... Holding | maintenance part, 2e ... Attraction | suction part, 3,31 ... Electromagnetic coil, 4 ... Permanent magnet, 5 ... Output shaft, 6,24 ... Coil spring as an elastic member, 23 ... Gap, 32 ... 1st electromagnetic coil, 33 ... 2nd electromagnetic coil, A, E, J ... Magnetic circuit as 1st magnetic circuit, B, C, F, G, K, L ... Magnetic circuit as 2nd magnetic circuit, M ... magnetic circuit.

Claims (5)

An output shaft made of a magnetic material and moved by magnetic attraction;
A solenoid body made of a magnetic body having a holding portion that holds the output shaft movably, and a suction portion that faces the output shaft and attracts the output shaft by the magnetic attraction;
An electromagnetic coil that is mounted on the solenoid body so as to penetrate a part of the solenoid body and forms a magnetic circuit passing through the inside of the solenoid body and the output shaft;
An electromagnetic solenoid device comprising: an elastic member that biases the output shaft in a direction that opposes a magnetic attractive force between the output shaft and the attraction unit;
Comprising a permanent magnet arranged to form a magnetic circuit passing through the interior of the solenoid body;
When deenergizing the electromagnetic coil, the magnetism of the permanent magnet forms a first magnetic circuit that passes through the inside of the electromagnetic coil in the solenoid body,
When energizing the electromagnetic coil, a combined magnetic flux of the magnetic flux of the electromagnetic coil and the magnetic flux of the permanent magnet forms a second magnetic circuit that passes through the output shaft, and the combined magnetic flux increases the elastic force of the elastic member. An electromagnetic solenoid device configured to generate a magnetic attraction force exceeding, and to move the output shaft toward the attraction portion. The electromagnetic solenoid device according to claim 1,
The output shaft is capable of contacting the suction portion;
An electromagnetic solenoid device formed so as to keep the output shaft in contact with the attraction portion by a magnetic attractive force generated by a magnetic flux of the permanent magnet when the electromagnetic coil is not energized. . The electromagnetic solenoid device according to claim 1,
The output shaft is capable of contacting the suction portion;
In the solenoid body, a gap is formed in the first magnetic circuit,
An electromagnetic solenoid device formed so as to keep the output shaft in contact with the attraction portion by a magnetic attractive force generated by a magnetic flux of the permanent magnet when the electromagnetic coil is not energized. . The electromagnetic solenoid device according to claim 3,
The electromagnetic solenoid device, wherein the gap is straddled by the electromagnetic coil. The electromagnetic solenoid device according to claim 2, wherein:
The electromagnetic coil includes a first electromagnetic coil that forms a magnetic circuit in the same direction as a magnetic circuit that passes through the output shaft of the permanent magnet, and a magnetic field in a direction different from that of the magnetic circuit that passes through the output shaft of the permanent magnet. A second electromagnetic coil forming a circuit,
When the first electromagnetic coil is energized, a combined magnetic flux of the magnetic flux of the first electromagnetic coil and the magnetic flux of the permanent magnet forms the second magnetic circuit that passes through the output shaft, and the elastic force is generated by the combined magnetic flux. Generating a magnetic attractive force exceeding the elastic force of the member, and moving the output shaft to the suction part side;
Magnetic attraction due to a combined magnetic flux of the magnetic flux of the permanent magnet passing through the output shaft and the magnetic flux of the second electromagnetic coil in a state where the output shaft is in contact with the attraction portion when the second electromagnetic coil is energized. Is an electromagnetic solenoid device that is weaker than the elastic force of the elastic member and is configured to move the output shaft to the side opposite to the suction portion by the elastic force of the elastic member.

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