JP7258454B2 - rotary solenoid - Google Patents

Description

The present invention relates to a rotary solenoid having a stator portion fixed to a casing and a magnet rotor portion rotatably supported by the casing.

In general, a rotary solenoid has a function of switching between two positions by outputting a reciprocating rotational displacement. , ion shutters for semiconductor manufacturing equipment, and so on. In particular, optical path switching in optical equipment requires not only high speed and high operating angle accuracy, but also the installation space is limited. Since it is necessary to perform ion trimming on the element by arranging the shutters at a narrow pitch according to the size of the element, an ultra-thin rotary solenoid is required to drive the shutter. Furthermore, in the sorting of defective products by a chip semiconductor sorting device, an ultra-compact rotary solenoid is also required along with the miniaturization of chips.

Conventionally, rotary solenoids disclosed in Patent Documents 1 and 2 proposed by the present applicant have been known as miniaturized rotary solenoids used for such applications. The rotary solenoid (rotary electric machine) disclosed in Patent Document 1 efficiently secures a coil housing space, achieves miniaturization (ultraminiaturization), further reduces the overall cost, and achieves uniform characteristics and quality. Specifically, it is equipped with a magnet rotor having a magnet in the middle of the shaft and a stator with a coil wound on a coil bobbin that covers the iron core. A pair of bobbin halves having a shape in which the coil winding portion for winding the coil overlaps the outer peripheral surface of the magnet toward the center in the radial direction of the magnet. , and an iron core portion to be mounted between a pair of bobbin half bodies.

In addition, the rotary solenoid (solenoid) disclosed in Patent Document 2 easily realizes an ultra-compact solenoid and improves the reliability of the ultra-compact solenoid by mechanically protecting the connection part of the wire end. Specifically, it includes a cylindrical casing, an end cover that closes the opening of the casing, a coil bobbin that is housed in the casing, and one or more coils wound around the coil bobbin. A coil, one or more pin terminals attached to a coil bobbin and connected to wire ends led out from the coil, and a movable part having a magnet that is displaced by energization of the coil. a hole, an intermediate position where the wire end can be connected to the wire connecting part when the through hole is inserted from one end opening, and a final position where the wire connecting part is shielded by the barrier part of the coil bobbin. and a pin terminal having an intermediate attachment portion that can be fixed to the pin terminal, and a pin body portion that protrudes from the other end opening of the through hole portion at the final position.

Japanese Patent Application Laid-Open No. 2001-292557 JP 2012-039804 A

However, conventional rotary solenoids, including the rotary solenoids disclosed in Patent Documents 1 and 2, have the following problems to be solved.

First, the movable part (rotor part) that outputs the reciprocating rotational displacement is supported by the bearing part so as to be rotationally displaceable. Since they are arranged along the circumferential direction, the outer shape of the rotary solenoid as a whole when viewed from the axial direction is a circular shape or a square shape that accommodates this circular shape. Therefore, it is not easy to achieve miniaturization, and the outer diameter is limited to about 5 [mm]. In particular, when the outer diameter is reduced to around 5 mm, the winding space of the coil becomes narrow, so the number of coil turns cannot be increased, and the magnetic flux and ampere turns to obtain the necessary torque are secured. become difficult to do. As a result, the current becomes excessive, and the smaller the size, the higher the temperature of the coil and the lower the torque.

Secondly, since the stator portion is fixed to the circular casing portion (or yoke portion), each pole (N pole, S pole) formed by the stator portion has a radially protruding core. It is necessary to wind the magnet wire around the core to fabricate the coil. Therefore, the center position of the coil shifts inward along the arc as it goes outward, which complicates the manufacturing process by requiring a special winding device, etc., increasing the manufacturing cost and lowering the yield rate. cannot be ignored. In addition, in order to simplify the winding process, a method of mounting a coil bobbin on which a coil is wound is also adopted, but if the outer diameter is reduced to about 5 [mm], the installation space for the coil will be large. Due to the limitations, it is difficult to use the coil bobbin, and the method of attaching the coil bobbin to the core cannot be practically adopted.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary solenoid which solves the problems existing in the background art.

In order to solve the above problems, the rotary solenoids 1 and 1e according to the present invention are fixed to a casing 2 and rotatably supported by a stator section having a coil 4 wound around a stator core 3 and the casing 2. When constructing a rotary solenoid having a magnet rotor portion, a stator portion Ms having a coil 4 manufactured by winding a magnet wire W around a center core portion 3c located in the intermediate portion of a U-shaped stator core 3, and a laterally elongated By forming integrally with the rectangular parallelepiped shape F, guide recesses 21, 21 for guiding accommodation of the stator core 3 constituting the stator portion Ms are provided on the inner surfaces 2si, 2si inside from the opening 2o on one surface of the rectangular parallelepiped shape F, and The stator regulating portion 11 is provided with locking portions 22, 22 capable of regulating at least the position of the stator core 3 at predetermined positions Xs of the guide recesses 21, 21. A casing 2 integrally formed of a synthetic resin material having a bearing portion 12 and an allowance recess 23 that serves as an escape space for the coil 4, and a synthetic resin material integrally formed of a synthetic resin material that closes the opening 2o and has the other bearing portion 14 It integrally has a cover 13 and a magnet 15 arranged between a pair of side core portions 3p and 3q located on both sides of the center core portion 3c, one end side of which is supported by one bearing portion 12, and the other end side of which is the other bearing portion. The pair of side core portions 3p and 3q are provided with a magnet rotor portion Mr supported by a magnet 14, and the pair of side core portions 3p and 3q are provided with opposing surfaces 3pf and 3qf which are formed on parallel surfaces facing each other, and a peripheral surface 15f of the magnet 15 via a constant clearance Cc. The outer diameter dimension of the magnet 15 is L1 and the inner diameter dimension is L2, and the maximum and minimum spacing dimensions between the pair of side core portions 3p and 3q are L3 and L4, When the axial dimension of the coil 4 is L5, the selection is made so that the relationships are L3>L1>L4>L2 and L4=L5.

Further, according to a preferred aspect of the present invention, the magnet 15 is oriented in one direction perpendicular to the shaft 16, and is divided into two poles, an S pole and an N pole, in this orientation direction. It can be radially oriented in the radial direction of the shaft 16, and can be formed in a cylindrical shape that is dividedly magnetized into two poles, an S pole and an N pole, in this radial orientation. On the other hand, a stopper mechanism 17 can be provided inside or outside the casing 2 to restrict the rotation range of the magnet rotor portion Mr to the set range Zr by locking. In addition, a coating insulating layer 18 is provided by applying an insulating paint to the surface of the center core portion 3c, and the magnet wire W can be directly wound on the coating insulating layer 18. FIG. At this time, the magnet wires W can be heat-sealed wires Wh.

According to the rotary solenoids 1, 1e according to the present invention, the following remarkable effects can be obtained.

(1) A stator portion Ms having a coil 4 made by winding a magnet wire W around a center core portion 3c located in the middle portion of the U-shaped stator core 3 is integrally formed into a laterally long rectangular parallelepiped shape F. As a result, the casing 2 is provided with stator regulating portions 11 that can guide the stator portion Ms inside from the opening 2o on one surface of the rectangular parallelepiped shape F and can regulate at least the position of the stator core 3 at the predetermined positions Xs. Therefore, it is possible to easily achieve miniaturization and thinning of the overall contour shape, particularly an ultra-thin shape having a thickness of 5 [mm] or less. As a result, it can be arranged in narrow spaces such as gaps between parts, and can be arranged in arrays at high density. can be enhanced.

(2) Since a rational magnetic path can be constructed in consideration of the shape and volume of the magnet 15 and the stator core 3, the number of turns can be increased by relatively securing the winding space of the coil 4. As a result, magnetic flux and ampere-turns for obtaining the necessary torque can be easily obtained, and high drive torque can be secured even with an ultra-thin structure. In addition, in manufacturing, it is possible to combine simple manufacturing processes, such as eliminating the need for a special winding device. It can also contribute to the improvement of the product yield rate.

(3) When forming the stator core 3, the parallel surfaces 3pf and 3qf of the pair of side core portions 3p and 3q are provided with a constant clearance Cc with respect to the peripheral surface Mrf of the magnet rotor portion Mr. Since the curved surfaces 3pr and 3qr facing each other are formed by forming the curved surfaces 3pr and 3qr facing each other, the area facing the peripheral surface Mrf of the magnet rotor portion Mr can be increased and the diameter of the magnet 15 can be increased without providing a projecting portion for each of the facing surfaces 3pf and 3qf. We can make it big. As a result, even when miniaturizing the rotary solenoid 1, the necessary torque (magnetic flux) can be ensured and the self-holding force can be increased when the power is not supplied.

(4) When configuring each part, the outer diameter dimension of the magnet 15 is L1 and the inner diameter dimension is L2, the maximum and minimum spacing dimensions between the pair of side core portions 3p and 3q are L3 and L4, and the axis of the coil 4 When the directional dimension is L5, the relationship of L3>L1>L4>L2 and L4=L5 is selected. Therefore, the longitudinal dimension of the center core portion 3c can be utilized to the maximum, and a space equal to the longitudinal dimension of the center core portion 3c can be used. can be ensured. As a result, the winding process of the magnet wire W can be easily and reliably performed by using a general-purpose winding apparatus, and can contribute to the reduction of the manufacturing cost.

(5) When forming the casing 2 and the cover 13, since both are integrally formed from the synthetic resin material R, they can be integrally formed as a resin molded product. As a result, productivity and cost reduction can be improved, and the casing 2 and the cover 13 can be easily integrated by thermal welding.

(6) According to a preferred embodiment, the magnet 15 is oriented in one direction perpendicular to the shaft 16 and divided into two poles, S and N, in this orientation direction to form a cylindrical shape, or in the radial direction of the shaft 16. If it is radially oriented and formed into a cylindrical shape that is dividedly magnetized into two poles, an S pole and an N pole, in this radial orientation, a large magnetic flux can be generated even with a small diameter, and it can be implemented in the simplest form. , can be implemented as an optimal mode matched with the stator core 3 .

(7) According to a preferred embodiment, if a stopper mechanism 17 is provided inside or outside the casing 2 to regulate the rotation range Zr of the magnet rotor portion Mr by locking, two-way rotation output by the output of the reciprocating rotation displacement can be achieved. Since it can function as a position switching actuator, it can be used as the original rotary solenoid 1 and can easily set an arbitrary setting range Zr.

(8) According to a preferred embodiment, the coating insulating layer 18 is provided by applying an insulating paint to the surface of the center core portion 3c of the stator core 3, and the magnet wire W is directly wound on the coating insulating layer 18. In this case, a short circuit with the coil 4 can be easily and reliably prevented, and the coil bobbin can be eliminated, so the number of turns of the magnet wire W can be increased, and an ultra-thin shape (ultra-miniature shape) can be easily realized.

(9) According to a preferred embodiment, if the heat-sealing wire Wh is used as the magnet wire W, the magnet wires W can be fused to each other, so that the winding collapse of the coil 4 during winding can be avoided. At the same time, the magnet wire W can be reliably wound without using a coil bobbin, and the improved strength can contribute to prevention of disconnection due to vibration or the like.

A cross-sectional plan view of a rotary solenoid according to a preferred embodiment of the present invention (cross section along line AA in FIG. 2), Cross-sectional front view of the same rotary solenoid, Cross-sectional side view of the same rotary solenoid (cross-section on the BB line in FIG. 2), Plan view of the internal structure of the same rotary solenoid without the cover, A plan view of the casing of the same rotary solenoid, Dimensional relationship diagram of the same rotary solenoid, Parts diagram of the same rotary solenoid disassembled, A flow chart for explaining the manufacturing method of the same rotary solenoid, FIG. 2 is a partial cross-sectional side view of a winding device for winding a magnet wire around a stator core provided in the same rotary solenoid; A plan view of the same winding device, Operation explanatory diagram of the same rotary solenoid, FIG. 11 is a plan view of the internal structure of a rotary solenoid excluding a cover according to a modified embodiment of the present invention; A partial cross-sectional side view showing a modified example of the same winding device, A partial cross-sectional side view showing another modification of the winding device,

Next, preferred embodiments according to the present invention will be presented and explained in detail based on the drawings.

First, members constituting a rotary solenoid 1 according to this embodiment will be described with reference to FIGS. 1 to 7. FIG.

As shown in FIGS. 1 to 7, the rotary solenoid 1 includes a casing 2 integrally formed in a horizontally long cuboid shape F having an opening 2o on one side and a cover 13 closing the opening 2o. The cover 13 is integrally molded from a plastic material (synthetic resin material) R, respectively. If the casing 2 and the cover 13 are integrally formed from the plastic material R in this manner, they can be integrally molded as a resin molded product, so that mass productivity and cost reduction can be enhanced.

Although it is desirable that both the casing 2 and the cover 13 are made of the plastic material R, the case where one or both of them are made of a material other than the synthetic resin material R is not excluded. For example, it may be formed of other materials such as metal materials (aluminum, etc.) in consideration of strength and the like. Even in this case, because of the miniaturization, it can be easily assembled with an adhesive or the like.

As shown in FIG. 5, the casing 2 has a rectangular parallelepiped shape F with the shortest side Fs, and the dimension Ls of the shortest side Fs is 5 [mm] in the example. In addition, both sides of this shortest side Fs have long sides Fm in the direction perpendicular to each other, but as shown in FIG. It is desirable to select the relation of the dimension Lm of to satisfy the condition of (Lm/Ls)>1.5.

Further, inside the casing 2 are formed stator restricting portions 11, 11 capable of accommodating a stator portion Ms, which will be described later, from an opening portion 2o. In the case of illustration, as shown in FIGS. 5 and 7, guide recesses 21, 21 for guiding accommodation of the stator core 3 are formed along the inner surfaces 2si, 2si from the pair of long sides Fm, Fm facing each other in the opening 2o. They are formed up to predetermined positions Xs, Xs in the middle of 2si, 2si, respectively. The bottom surfaces of the guide recesses 21, 21 at the predetermined positions Xs . By providing such stator restricting portions 11, 11, the stator portion Ms can be easily and smoothly housed (assembled) inside the casing 2, and after being housed, the stator portion Ms can be positioned with respect to the casing 2. will be

Moreover, as shown in FIG. and a portion of the bottom plate portion 2d corresponding to a position for accommodating the magnet rotor portion Mr, which will be described later, is provided with one end side of the shaft 16 of the magnet rotor portion Mr. One bearing portion 12 that can be freely supported is formed. Since the rotary solenoid 1 does not rotate at a high speed like an electric motor, a simple circular hole is sufficient for the bearing portion 12, but if necessary, a separate bearing body may be provided by insert molding or assembly. In addition, reference numerals 25 and 25 shown in FIG. 5 denote U-shaped cutouts for leading out the pair of lead wires 61 and 62 as shown in FIG.

On the other hand, the cover 13 is formed in a flat plate shape, and the inner surface 13i is formed with a thick portion 31 that fits the inner surfaces 2si of the casing 2 when the cover 13i is attached to the opening 2o of the casing 2. As shown in FIG. Also, at a position facing the allowable recess 23 in the thick portion 31, a similar allowable recess 32 is formed as an escape space for accommodating the coil 4, and corresponds to a position for accommodating the magnet rotor portion Mr described later. The other bearing portion 14 capable of rotatably supporting the other end side of the shaft 16 of the magnet rotor portion Mr is formed at the portion of the thick portion 31 . In this case, as with the bearing portion 12, a simple circular hole is sufficient for the bearing portion 14, but if necessary, a separate bearing body may be provided by insert molding or assembly.

Since the cover 13 is positioned by the thick portion 31 when assembled to the casing 2, the pair of bearing portions 12 and 14 are positioned, and the magnet rotor portion Mr is also positioned. Further, since the stator portion Ms is also positioned by the casing 2 described above, the main constituent elements of the casing 2, the cover 13, the stator portion Ms and the magnet rotor portion Mr are integrated while being positioned with each other.

On the other hand, the rotary solenoid 1 includes a stator portion Ms and a magnet rotor portion Mr shown in FIG. The rotary solenoid 1 according to the present embodiment has a very simple basic structure, since it is sufficient to prepare the separately manufactured stator portion Ms and magnet rotor portion Mr in addition to the casing 2 and the cover 13 described above.

The stator portion Ms is composed of a stator core 3 and coils 4, as shown in FIG. As shown in FIG. 1, the stator core 3 is generally U-shaped and has a center core portion 3c located in the middle and a pair of side core portions 3p and 3q extending perpendicularly from both ends of the center core portion 3c. , SPCC, SECC, silicon steel, and other soft magnetic magnetic steel sheets can be integrally formed by press working. In addition, a soft magnetic material molded by forging or the like may be used.

In this case, the opposing surfaces 3pf and 3qf of the pair of side core portions 3p and 3q are formed parallel to each other, and the portion facing the peripheral surface 15f of the magnet 15, which will be described later, is provided with Arc-shaped curved surfaces 3pr and 3qr facing each other with a constant clearance Cc are formed. By forming such curved surfaces 3pr and 3qr, it is possible to increase the facing area of the magnet rotor portion Mr with respect to the peripheral surface Mrf without providing a protruding portion on each of the facing surfaces 3pf and 3qf. can be increased, even when miniaturizing the rotary solenoid 1, the required torque (magnetic flux) can be secured and the self-holding force can be increased when the current is not supplied.

A coating insulating layer 18 is provided on the surface (outer surface) of the center core portion 3c of the stator core 3 by applying an insulating paint such as resin electrodeposition or powder electrostatic coating. Specifically, various resin materials such as fluorine resin, acrylic resin, and epoxy resin can be used. In particular, by using imidoamide-epoxy modified resin, it is possible to obtain an insulating layer having high insulating properties and sufficient strength even if it is a thin film. In any case, in the case of this embodiment, even if the thickness of the insulating coating layer 18 is about 10 [μm], it is possible to provide a sufficient insulating capability. In addition, if the thickness of the coating insulation layer 18 is selected to be smaller than the conductor wire diameter of the coil 4, the number of turns can be increased by securing the winding space, which contributes to the reduction of power consumption.

Therefore, if such a coating insulating layer 18 is provided, even if the magnet wire W is directly wound on the coating insulating layer 18, it is possible to prevent a short circuit with the coil 4, and the coil bobbin can be prevented from being short-circuited. Since it can be eliminated, the number of turns of the magnet wire W can be increased, and an ultra-thin shape (ultra-compact shape) can be easily realized.

Then, the coil 4 can be manufactured by directly winding the magnet wire W around the center core portion 3c using a winding device 70, which will be described later. In this case, for the magnet wires W, it is desirable to use, for example, a heat-sealable wire Wh in which a surface of an annealed copper wire is coated with a heat-sealing film made of thermoplastic resin or thermosetting resin. If such a heat-sealing wire Wh is used as the magnet wire W, the magnet wires W can be fused to each other. In addition, the winding process of the magnet wire W can be reliably executed, and the improvement in strength can contribute to prevention of disconnection due to vibration or the like. The magnet wire W may be a general conducting wire with a round cross section, or a rectangular conducting wire with a square cross section.

On the other hand, as shown in FIGS. 1 and 7, the magnet rotor portion Mr includes a shaft 16 made of a soft magnetic material. The shaft 16 is formed in the shape of a round bar, and a D-cut surface is provided in a predetermined range on one end side (tip side). A large-diameter portion is formed at a predetermined intermediate position of the shaft 16, and a cylindrical magnet 15 is fixed to this large-diameter portion by adhesion. Thereby, a closed magnetic circuit is formed between the magnet 15 and the shaft 16 . The large-diameter portion of the shaft 16 makes it easier and stronger to adhere to the magnet 15 . One end of the shaft 16 is rotatably supported by a bearing 14 formed in the cover 13 , and the other end is rotatably supported by a bearing 12 formed in the casing 2 .

The magnet 15 can be made of a permanent magnet such as a ferrite magnet or a rare earth magnet. The magnet 15 may be oriented in one direction perpendicular to the shaft 16 and may be formed in a cylindrical shape divided into two poles, an S pole and an N pole, in this orientation direction, or may be formed in the radial direction of the shaft 16 It may be radially oriented and formed into a cylindrical shape that is dividedly magnetized into two poles, an S pole and an N pole, in this radial orientation. With this configuration, even if the magnet 15 has a small diameter, it is possible to generate a large magnetic flux, and it can be implemented in the simplest form. If an Nd--Fe--B magnet is used as the magnet 15, a high magnetic flux density can be secured in the air gap and torque can be increased.

Since the rotary solenoid 1 has such a configuration, the overall dimensional relationship is as shown in FIG. L3 is the maximum distance between the curved portions 3pr and 3qr, and the minimum distance between the pair of side core portions 3p and 3q is the parallel surface 3pf and 3qf is L4, and the axial dimension of the coil 4 is L5.

If the overall dimensions are selected in such a relationship, the longitudinal dimension of the center core portion 3c can be maximized and a space equal to the longitudinal dimension of the center core portion 3c can be secured. can be easily and reliably performed by using a general-purpose winding device, and can contribute to a reduction in manufacturing costs. In addition, it is desirable to select the axial dimension of the magnet 15 to be longer than the axial dimension L5 of the coil 4 .

Next, a method for manufacturing the rotary solenoid 1 according to the present embodiment will be described according to the flowchart shown in FIG. 8 while referring to FIGS. 1 to 7 and 9 to 12. FIG.

Note that FIG. 9 shows a winding device 70 suitable for use in manufacturing the stator portion Ms. First, the winding device 70 will be described. The winding device 70 is roughly divided into a rotary drive section 71 that also serves as a machine base, and a rotary table 72 that is supported on the upper end of a rotary support section 71s projecting upward from the rotary drive section 71 . The rotary table 72 is entirely made of a magnetic material in the shape of a cylindrical disk, and in particular, the upper table surface 72u is formed to be a flat surface.

A core set portion 73 is formed by a concave portion on the table surface 72u. The core set portion 73 has an opening shape selected so that it can be positioned in the horizontal direction when one side core portion 3q (or 3p) of the stator core 3 is fitted from above, and has a predetermined depth. By forming, a holding magnet 74 having SN poles in the upper and lower directions is fixed to the bottom. Therefore, the depth of the core set portion 73 is selected so that the upper surface of the side core portion 3q is aligned with or slightly above the table surface 72u when the side core portion 3q is set and attracted to the holding magnet 74. do. It is desirable that the holding magnet 74 be movable or composed of an electromagnet or the like so that the attracting function (clamping function) can be turned ON/OFF.

The position on the table surface 72u where the core set portion 73 is provided is such that when the side core portion 3q is set on the core set portion 73 (including the holding magnet 74), the center core portion 3c is perpendicular to the table surface 72u. A position is selected in which the center (axis center) Pc of the center core portion 3 c coincides with the rotation center of the rotary table 72 .

Accordingly, when one side core portion 3q of the stator core 3 is set (accommodated) in the core set portion 73, the side core portion 3q is attracted and fixed to the holding magnet 74 as shown in FIG. Positioned by 73. A dotted arrow Dm indicates the path of the magnetic lines of force.

By the way, in the stator core 3 according to the present embodiment, the longitudinal dimension of the side core portion 3p is about 5 [mm], so it is not easy to mechanically pinch and fix it with a chuck or the like. Even if it is sandwiched and fixed, the holding area becomes small and it becomes difficult to hold it in a stable state. Since the winding device 70 used in this embodiment is attracted by the holding magnet 74, it is possible to sufficiently hold and fix the stator core 3 even if the size of the stator core 3 is reduced. It is most suitable for manufacturing the rotary solenoid 1 according to the present embodiment because it can contribute to cost reduction.

Therefore, this winding device 70 can be modified into various other forms. As an example, FIG. 11 shows a winding device 70e in which the turntable 72 is changed to a turntable 72e made of plastic material. In this modification, since the rotary table 72e does not form a magnetic path, the magnetic plate 75 is accommodated in the core set portion 73, and two holding magnet members 74ep and 74en are mounted on the magnetic plate 75 on the left and right sides. holding magnets 74e arranged side by side. The magnetic poles of the two holding magnet members 74ep and 74en are upside down. As a result, a magnetic path can be formed by the two holding magnet members 74ep and 74en, the magnetic plate 75 and the stator core 3, and the rotary table 72e made of inexpensive and lightweight plastic material can be used.

Also, FIG. 12 shows a winding device 70f to which a pressing block 76 supported by a support mechanism (not shown) is added. In this modified example, since the stator core 3 can be held and fixed at the top and bottom, the stator core 3 can be fixed reliably and stably. As a result, unnecessary deformation of the coil 4 can be prevented, and the stator core 3 can be easily set in the core set portion 73 by functioning as a catcher when the stator core 3 is set in the core set portion 73.

Specifically, as shown in FIG. 12, a core holding portion 77 is formed on the lower surface 76d of the holding block 76 to fit and hold the side core portion 3p positioned above the stator core 3 set in the core setting portion 73. In addition, a magnet accommodating portion 78 is provided on the upper surface of the pressing block 76 located right above the core holding portion 77, and a holding magnet 79 is accommodated in the magnet accommodating portion 78. As shown in FIG. In this case, the lower surface of the side core portion 3p is selected to coincide with or slightly below the lower surface 76d of the holding block 76, and the upper surface of the side core portion 3q is arranged to coincide with or slightly above the upper surface 72u of the rotary table 72. Select to

An example of using a magnet as a means for fixing the stator core 3 in the winding device 70 (70e, 70f) has been described above. , suction means, etc., can also be used. In FIGS. 11 and 12, the same parts as in FIG. 9 are given the same reference numerals to clarify the structure thereof, and detailed description thereof will be omitted.

Therefore, when manufacturing the rotary solenoid 1 according to the present embodiment, first, the stator portion Ms is manufactured by the stator manufacturing process. When manufacturing the stator portion Ms, a prefabricated stator core 3 is prepared. Then, the stator core 3 is set in the core setting section 73 of the winding device 70 (step S1). Further, the tip side of the heat-sealing wire Wh fed out from a wire feeding portion (not shown) is temporarily fixed at the winding start position of the center core portion 3 c of the stator core 3 . Then, a hot air discharge section (not shown) is operated to locally discharge (supply) hot air toward the center core section 3c (step S2).

Next, the winding device 70 is operated (step S3). By the operation of the winding device 70, the rotary table 72 is rotated, and the stator core 3 set on the rotary table 72 is rotated. is fed out (step S4).

As a result, the heat-sealing wire Wh is wound around the center core portion 3c of the stator core 3, and the coil 4 is manufactured. , the wound heat-sealing wires Wh are fixed to each other (step S5). When the set number of turns has been wound, the winding process is terminated (step S6). As described above, the stator portion Ms shown in FIG. 7 can be manufactured (step S7).

Also, a magnet rotor portion Mr is prepared. The magnet rotor portion Mr can be obtained by previously assembling the magnet 15 to the separately manufactured shaft 16 . That is, the shaft 16 is passed through the cylindrical magnet 15, and the outer peripheral surface of the large-diameter portion of the magnet 15 and the inner peripheral surface of the magnet 15 are fixed with an adhesive or the like (step S8). The magnet rotor portion Mr has been described as a single unit in which the magnet 15, which has been magnetized, is assembled to the shaft 16. Magnetization may be performed with reference to the D-cut surface of . In this case, it is particularly desirable to set the magnetization timing after assembly to the casing 2. This has the advantage of effectively preventing unnecessary adhesion of dust such as metal powder to the magnet 15 during assembly. In this way, even if the magnet material before magnetization is assembled to the shaft 16 and then magnetized, the magnet material can be regarded as the magnet 15 from the standpoint of assembly. This is the same concept as the case where the magnet 15 that has been completely magnetized is attached to the shaft 16 . Thus, the magnet rotor portion Mr shown in FIG. 7 can be manufactured (step S9).

Next, the manufactured stator portion Ms is assembled to the casing 2 by a stator assembly process. In this case, first, the casing 2 is set in a predetermined assembly machine (step S10). Then, as shown in FIG. 7, assembly can be easily performed simply by housing the stator portion Ms inside the casing 2 through the opening portion 2o (step S11). In this case, the stator portion Ms is housed inside the casing 2 from the opening 2o along the direction of the arrow D1. At this time, the stator core 3 is guided in a straight line by the guide recesses 21, 21, so that it can be easily accommodated, and after being accommodated, it is stopped by engaging the engaging portions 22, 22. As shown in FIG. As a result, the stator portion Ms is accurately positioned by the stator regulating portions 11, 11 provided in the casing 2. As shown in FIG.

When the stator portion Ms is accommodated, the lead wires 61 and 62 are connected to the coil 4 as shown in FIG. 4 (step S12). In this case, lead wires (conductor portions) Wha and Whb at the winding start and winding end of the heat-sealing wire Wh of the coil 4 are wrapped around the exposed conductor portions 61s and 62s of the lead wires 61 and 62 and soldered. etc. can be connected.

Next, the prepared magnet rotor portion Mr is assembled to the casing 2 by a magnet rotor assembly step (step S13). In this case, as shown in FIG. 7, the magnet rotor portion Ms may be housed inside the casing 2 through the opening 2o (step S13). At this time, the other end of the shaft 16 is inserted through the spacer 51 into the bearing portion 12 provided on the bottom plate portion 2 d of the casing 2 . The spacer 51 is formed like a washer using a lubricating resin material such as fluororesin or POM (polyacetal).

Next, the prepared cover 13 is assembled to the casing 2 by a cover assembly process (step S14). In this case, if one end side of the shaft 16 is inserted into the bearing portion 14 of the cover 13 through the spacer 51 , the opening 2 o of the casing 2 is closed by the cover 13 . Then, the cover 13 and the casing 2 are fixed by heat welding. As a result, the desired rotary solenoid 1 shown in FIGS. 1 to 3 can be manufactured.

Next, the operation (function) of the rotary solenoid 1 according to this embodiment will be described with reference to FIG.

When the rotary solenoid 1 according to the present embodiment is actually used, a stopper mechanism 17 may be provided inside or outside the casing 2 to restrict the rotation range of the magnet rotor portion Mr to the set range Zr by locking. can. FIG. 13 shows an example of the stopper mechanism 17 provided outside the casing 2 . The stopper mechanism 17 is provided with a locking lever portion having one end fixed to the shaft 16 , is arranged on both sides of the locking lever portion 41 in the rotational displacement direction, and is locked to the locking lever portion 41 to be locked. A pair of stopper portions 42 and 43 are provided for restricting the rotational displacement of the lever portion 41 . As a result, the illustrated rotary solenoid 1 (magnet rotor portion Mr) is set to the setting range Zr of approximately 60[°], and the first position where the locking lever portion 41 is locked to one stopper portion 42 and the other It has a function of reciprocally rotating between second positions where it is locked to the stopper portion 43 .

On the other hand, the rotary solenoid 1 operates as follows. In the illustrated rotary solenoid 1, the magnet 15 is magnetized in the radial direction passing through the locking lever portion 41, and the S pole is on the side of the locking lever portion 41 with the shaft 16 as a boundary, and the N pole is on the opposite side. assume that it is occurring. Lead wires 61 and 62 led out from the rotary solenoid 1 are connected to a controller 65 containing a power source, and the coil 4 is energized in the forward direction.

Therefore, in this state, the coil 4 is excited in the positive direction, and in FIG. 13, an S pole is generated in the upper side core portion 3p and an N pole is generated in the lower side core portion 3q. As a result, the N pole of the magnet 15 is attracted to the side core portion 3p of the S pole and repels the side core portion 3q of the N pole, and the S pole of the magnet 15 is moved to the side core portion 3q of the N pole. It is attracted and repels against the side core portion 3p of the S pole.

As a result, the magnet 15 rotates clockwise in FIG. 13 and stops at the first position where the locking lever portion 41 is locked to the stopper portion 42 . Further, if the coil 4 is de-energized after or just before stopping at the first position, the N pole and S pole of the magnet 15 are attracted to the adjacent side core portions 3p and 3q, which are magnetic materials, respectively, and are self-held. The function holds the stopped state in the first position.

Next, by switching the energization polarity of the rotary solenoid 1 under the control of the controller 65, the coil 4 is energized in the opposite direction, and in FIG. A south pole is generated in the side core portion 3q of . As a result, the N pole of the magnet 15 is attracted to the side core portion 3q of the S pole and repels the side core portion 3p of the N pole, and the S pole of the magnet 15 is moved to the side core portion 3p of the N pole. It is attracted and repels against the S pole side core portion 3q.

As a result, the magnet 15 is rotated counterclockwise in FIG. again,
When the coil 4 is de-energized after or immediately before stopping at the second position, the N and S poles of the magnet 15 are attracted to the adjacent side core portions 3q and 3p, which are magnetic materials, respectively, due to the self-holding function. Hold the stopped state of the second position. As described above, if the stopper mechanism 17 is provided inside or outside the casing 2 to restrict the rotation range of the magnet rotor portion Mr to the set range Zr by engagement, the two-position switching actuator by output of the reciprocating rotation displacement can be used. can be used as the original rotary solenoid 1, and an arbitrary setting range Zr can be easily set. As described above, FIG. 13 shows an example in which the stopper mechanism 17 is provided outside the casing 2 , but this stopper mechanism 17 may be similarly provided inside the inner space of the casing 2 .

Next, a rotary solenoid 1e according to a modified embodiment of the invention will be described with reference to FIG.

In the rotary solenoid 1e shown in FIG. 14, two stator portions Ms having the same configuration are prepared. In addition, a second stator portion Ms is arranged on the other side which is 180[°] opposite. Therefore, in this case, the other stator portion Ms is horizontally reversed with respect to the other stator portion Ms, and the curved surfaces 3pr, 3qr of the side core portions 3p, 3q of the one stator portion Ms and the curved surfaces 3pr, 3qr of the other stator portion Ms. The curved surfaces 3pr, 3qr of the side core portions 3p, 3q are overlapped with each other. For this reason, the stator portions Ms are arranged at different levels in the axial direction of the shaft 16 . Further, compared to the rotary solenoid 1 (FIG. 1) of the basic form, the magnet 15 is formed to have a longer axial length, and the casing 2 is formed to have a longer longitudinal length.

As a result, the rotary solenoid 1e according to the modified embodiment can increase the driving force (driving torque) while maintaining the same thickness (5 [mm]) as the rotary solenoid 1 in the basic form. Further, the rotary solenoid 1e can also be configured by providing three or more stator portions Ms, provided that the plurality of stator portions Ms are arranged in different levels in the axial direction of the shaft 16. FIG.

Therefore, the rotary solenoids 1 and 1e according to this embodiment are manufactured by winding the magnet wire W around the center core portion 3c located in the intermediate portion of the U-shaped stator core 3 as a basic configuration. By integrally forming the stator portion Ms having the coils 4 and the horizontally long rectangular parallelepiped shape F, the stator portion Ms is guided inside from the opening 2o on one surface of the rectangular parallelepiped shape F, and at least the stator core 3 is guided at predetermined positions Xs. and a casing 2 having one bearing portion 12 on a bottom plate portion 2d facing the opening portion 2o, and a bearing portion 14 closing the opening portion 2o and the other bearing portion 14. and a magnet 15 arranged between a pair of side core portions 3p and 3q located on both sides of the center core portion 3c. Since the magnet rotor portion Mr supported by the bearing portion 14 is provided, the size and thickness of the overall outer shape can be reduced, and in particular, an ultra-thin shape with a thickness of 5 mm or less can be easily realized. As a result, it is possible to accommodate various installation spaces, such as installation in narrow spaces such as gaps between parts and high-density arrangement by arraying, dramatically improving versatility and expandability. can be enhanced.

In addition, since a rational magnetic path can be constructed in consideration of the shape and volume of the magnet 15 and the stator core 3, the number of turns can be increased by relatively securing the winding space of the coil 4. FIG. As a result, magnetic flux and ampere-turns for obtaining the necessary torque can be easily obtained, and high drive torque can be secured even with an ultra-thin structure. In addition, in manufacturing, it is possible to combine simple manufacturing processes, such as eliminating the need for a special winding device. It can also contribute to the improvement of the product yield rate.

Although preferred embodiments (modified embodiments) including modified examples have been described in detail above, the present invention is not limited to such embodiments, and detailed configurations, shapes, materials, quantities, numerical values, etc. , can be arbitrarily changed, added, or deleted without departing from the gist of the present invention.

For example, as a configuration example in which a stopper mechanism 17 is provided inside or outside the casing 2 to restrict the rotation range of the magnet rotor portion Mr to the set range Zr by engagement, a configuration in which a part of the rotary solenoid 1 is also used. Alternatively, without providing the stopper mechanism 17, the rotary solenoid 1 may directly follow the regulated range of the switching target side mechanism. Furthermore, it is also possible to apply it as a motor by changing some parts without providing the stopper mechanism 17 . On the other hand, the case where the coating insulating layer 18 is provided by applying an insulating paint to the surface of the center core portion 3c of the stator core 3 has been shown, but applying the insulating paint means that a similar function such as attaching an insulating tape is exhibited. It is a concept that includes other means. In addition, although the case where the heat-sealing wire Wh is used as the magnet wire W is shown, the winding process is performed using the winding device 70f shown in FIG. 12, for example, without using the heat-sealing wire Wh. After the winding process, it may be fixed by a method such as applying a fixing agent.

The rotary solenoid according to the present invention utilizes its reciprocating rotatability to sort money and bills, sort mail, etc., switch the transport path of printed matter, switch the optical path of optical equipment, ion shutter of semiconductor manufacturing equipment, etc. , can be used for a variety of applications in numerous fields.

1: rotary solenoid, 2: casing, 2o: opening, 2d: bottom plate, 2si: inner surface, 3: stator core, 3c: center core, 3p: side core, 3q: side core, 3pf: facing surface, 3qf: facing surface, 3pr: curved surface, 3qr: curved surface, 4: coil, 11: stator regulation portion, 12: bearing portion, 13: cover, 14: bearing portion, 15: magnet, 16: shaft, 17: stopper mechanism, 18 : Coating insulating layer 21: Guide recess 22: Locking portion 23: Allowable recess 70: Winding device 74: Holding magnet L1: Maximum distance between a pair of side core portions L2: Magnet outer diameter Dimensions, L3: Minimum distance between a pair of side core portions, L4: Coil axial dimension, L5: Magnet inner diameter, Dd: Radial direction, F: Cuboid shape, Ms: Stator portion, Mr: Magnet rotor portion, Mrf : Peripheral surface of magnet rotor, Cc: Clearance, R: Synthetic resin material, Zr: Setting range, W: Magnet wire, Wh: Thermal fusion wire, Xs: Predetermined position

Claims (5)

A rotary solenoid having a stator portion fixed to a casing and having a coil wound around a stator core, and a magnet rotor portion rotatably supported by the casing, and positioned in the middle portion of the U-shaped stator core. A stator portion having a coil produced by winding a magnet wire around a center core portion and a horizontally long rectangular parallelepiped shape are integrally formed to form the stator portion on the inner surface of the inside from the opening on one surface of the rectangular parallelepiped shape. A guide recess for guiding accommodation of the stator core is provided, and a stator restricting portion provided with an engaging portion capable of restricting at least the position of the stator core at a predetermined position of the guide recess. a casing integrally formed of a synthetic resin material having one bearing portion and an allowable recess serving as an escape space for the coil; a cover integrally formed of a synthetic resin material that closes the opening and has the other bearing portion; A magnet rotor portion integrally having a magnet disposed between a pair of side core portions positioned on both sides of the center core portion, and having one end supported by the one bearing and the other end supported by the other bearing. is formed in a curved surface facing the peripheral surface of the magnet rotor portion with a certain clearance on the opposed surfaces formed on the parallel surfaces of the pair of side core portions, and the outer surface of the magnet When the diameter dimension is L1, the inner diameter dimension is L2, the maximum spacing dimension between the pair of side core portions is L3, the minimum spacing dimension is L4, and the axial dimension of the coil is L5, L3>L1>L4>L2. , L4=L5. The magnet is oriented in one direction perpendicular to the shaft and has a cylindrical shape that is divided into two poles, an S pole and an N pole, in this orientation direction, or is radially oriented in the shaft radial direction and 2. The rotary solenoid according to claim 1, wherein the rotary solenoid is formed in a cylindrical shape which is dividedly magnetized into two poles of an S pole and an N pole. 2. The rotary solenoid according to claim 1, wherein a stopper mechanism is provided inside or outside said casing for restricting the rotation range of said magnet rotor portion to a set range by engagement. 2. The rotary solenoid according to claim 1, wherein an insulating coating layer is provided by applying an insulating paint to the surface of said center core portion, and said magnet wire is directly wound on said coating layer. 5. The rotary solenoid according to claim 1, wherein the magnet wire is a heat-sealed wire.

Images