JP2009111224A - Rotary solenoid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary solenoid which can maintain smooth rotational displacement for a long period of time without causing a collar to interfere with an extension portion during the turning of a rotary plunger, even if the collar is deformed in an outward spreading direction due to the stacking pressure of a coil body. <P>SOLUTION: A recess 16 for receiving spread deformation caused in the collars 12b and 12c of a winding spool 12 is formed at the internal surface side of the extension portion 10a, so that even if the collars 12b and 12c of the winding spool 12 are deformed outward due to spreading in a winding process of a coil body 13, the collars 12b and 12c do not interfere with the extension portion 10a during the turning of the rotary plunger 10 in a winding process for the coil body 12, thereby maintaining the smooth rotational displacement of the rotary plunger 10 for a long period of time. The recess 16 is formed at the internal surface side of the extension portion 10a, so that the extension portion 10a does not expand outward and is not enlarged as a whole, thereby achieving size reduction contributing to space saving. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle-mounted rotary solenoid mounted for rotationally driving a driven part of a vehicle.

  The rotating mechanism using an actuator includes a shift lever lock device for vehicles equipped with automatic transmissions (AT cars), a shade shielding plate that controls the light distribution of the low and high discharge headlamps, and the irradiation direction up and down. The present invention is also applied to a leveler for adjustment, an AFS for adjusting the irradiation direction to the left and right, and an actuator for opening and closing various valves.

  An electromagnetic solenoid device that operates in a straight line is incorporated in the locking / unlocking mechanism of the shift lever lock device, the shield plate of the headlamp, etc., and a drive device composed of a step motor and a reduction gear is used for control of the levelizer, AFS, etc. It is used. The drive unit of the electromagnetic solenoid device drives the lock device and the shielding plate via a link mechanism.

  In recent years, for example, there has been a rotary solenoid that generates an electromagnetic attraction force between a plunger and a yoke by using a magnet or the like to give torque to the plunger and rotationally drive the driven part by the rotational displacement of the plunger. It is considered. Since the present invention has a structure different from that of related prior art documents, a suitable prior art document cannot be found even by investigation and cannot be listed in this column.

  In the above rotary solenoid, the plunger generally has a torque characteristic that the initial starting torque is maximum and gradually decreases as the rotational displacement proceeds. Regardless of the rotational position of the plunger, there is much room for improvement in order to realize an ideal rotary solenoid having a required rotational torque without excess or deficiency.

  The present invention is configured to obtain a torque characteristic close to ideal by strengthening the rotational torque of the rotary plunger based on the magnetic circuit formed by the magnet from the rotary plunger to the yoke.

  Therefore, the first object of the present invention is to generate a large rotational torque with a relatively simple structure without torque unevenness substantially uniformly, which is advantageous in terms of cost and excellent in mass productivity while saving space. To provide a rotary solenoid.

  In addition, the second object of the present invention is to rotate the coil body around the winding spool even if it is deformed in the direction in which the flange expands outward due to the lamination pressure of the coil body. An object of the present invention is to provide a rotary solenoid capable of maintaining a smooth rotational displacement of a rotating plunger over a long period of time without causing interference of the flange portion with the extending portion when the plunger is rotated.

(About claim 1)
The rotating core shaft is rotatably provided in the casing and is connected to the driven part. The yoke is composed of a plurality of support plate portions arranged substantially concentrically around the rotating core shaft in the casing and having a substantially arc-shaped cross section. The rotating plunger is provided on the outer peripheral portion of the rotating core shaft so as to be interlocked with the rotational displacement of the rotating core shaft, and the extending portion formed to extend in the radial direction of the rotating core shaft is connected to the inner peripheral surface of the support plate portion. It is made to oppose through a micro space | gap.
The winding spool is composed of a cylindrical tube wound with a coil body and flanges formed at both ends of the tube, and the tube is in a state where the flange is close to the inner surface side of the extension part. The rotating core shaft is mounted in a loosely-fitted state so as to be freely rotatable, and an electromagnetic attractive force is generated between the extension portion and the support plate portion by energizing the coil body.
The biasing member such as a torsion coil spring rotates the extending part in a direction to reduce the mutual overlapping part where the extending part and the support plate part overlap with each other through a minute gap when the coil body is not energized. Energized to the initial position. The escape portion is formed on the inner surface side of the extension portion, serves as an escape of the expansion deformation that occurs in the flange portion of the winding spool, and avoids interference of the flange portion with the extension portion when the rotary plunger rotates. When energizing the coil body, the rotary plunger is rotated by rotating it in the circumferential direction from the initial position to the stop position where the mutual overlap part increases by a predetermined amount against the biasing force of the biasing member by the electromagnetic attractive force. A rotational force is applied to the core shaft.

  According to the first aspect of the present invention, when the coil body is energized, the magnetic attraction from the extension portion to the yoke is uniformly applied to the yoke by the flow of magnetic flux from the extension portion to the yoke, and the rotating plunger is uneven. It is possible to reliably rotate from the initial position to the stop position with a large rotational torque without any problem, and to improve the response to the operation of the driven part.

The winding spool is usually made of plastic, and in the process of winding the coil body in multiple layers around the winding spool, the collar part is deformed in the direction of expanding outward due to the lamination pressure of the coil body. May end up.
Since the escape part that escapes the expansion deformation that occurs in the flange part of the winding spool is formed on the inner surface side of the extension part, the winding spool part expands and deforms outward during the winding process of the coil body. Even when the rotary plunger is rotated, the flange portion does not interfere with the extending portion, and the smooth rotation displacement of the rotary plunger can be maintained over a long period of time.
And since the escape part was formed in the inner surface side of the extension part, the extension part does not expand outside, the whole does not become large, and the miniaturization contributing to space saving can be maintained.

  The basic structure is a simple structure in which a rotating core shaft, coil body, rotating plunger, and yoke are provided in the casing, which is advantageous in terms of cost, can save space, has excellent mass productivity, and requires mass production. It is suitable as a rotary solenoid mounted on a vehicle.

(About claim 2)
The yoke is composed of a plurality of support plate portions arranged substantially concentrically around the rotating core shaft in the casing and having a substantially arc-shaped cross section. The extending portion has a substantially inverted L-shaped longitudinal section together with the vertical arm portion formed so as to be substantially perpendicular to the extending portion and directed in the axial direction of the rotary core shaft, and the outer peripheral surface of the vertical arm portion. Is opposed to the inner peripheral surface of the support plate portion via a minute gap.

  In this case, the vertical arm portion of the extension portion has its outer peripheral surface opposed to the inner peripheral surface of the support plate portion via a wide area, and therefore, there is no unevenness with respect to the rotating plunger as the coil body is energized. It is possible to reliably rotate from the initial position to the stop position while applying a large rotational torque, and from this point of view, the response to the operation of the driven part can be improved.

(Claim 3)
By reducing at least a part of the inner surface side of the vertical arm portion, the secondary arm has a secondary escape portion that is continuous with the escape portion by reducing its thickness. For this reason, even if the collar part of a spool becomes large in diameter and spreads outward, it is effective to avoid interference of the collar part with the extending part.

(About claim 4)
The escape portion is a tapered portion that is formed outward from the inner surface side of the extension portion and is inclined so as to gradually reduce the thickness of the extension portion.
The escape part is formed so that the inner surface side of the extension part is recessed, which is advantageous in terms of cost, and the extension part does not expand outward, and maintains a small size that contributes to space saving. can do.

(Claim 5)
Since the escape portion is a reduction portion having a stepped portion with a reduced thickness by reducing at least a part of the inner surface side of the extension portion, the same effect as in the fourth aspect can be obtained.

(About claim 6)
The escape portion is a reduction step portion that is divided into a plurality of steps and has a small thickness so that the amount of reduction on the inner surface side of the extension portion increases toward the outside. Also by this, the extension part does not expand outward, and the downsizing contributing to space saving can be maintained.

(About claim 7)
The escape portion is a curved surface portion that is formed outward from the inner surface side of the extension portion and curves so as to continuously reduce the thickness of the extension portion. Also by this, the extension part does not expand outward, and the miniaturization contributing to space saving can be maintained as in the fourth aspect.

(About claim 8)
The escape portion is provided with a step by attaching a filling pad made of a magnetic material on the inner surface side of the extension portion to form a reduction portion.
In this case, it is only necessary to prepare a separate filling pad and assemble it to the extending portion. Therefore, the reduction portion using the filling pad can be easily and quickly manufactured, which can contribute to improvement in productivity.

  As the coil body is energized, the rotating plunger rotates from the initial position to the stop position against the urging force of the urging member due to the electromagnetic attractive force acting between the extending portion of the rotating plunger and the yoke. The driven portion can be controlled by applying a rotational force to the rotating core shaft. Since the escape part that escapes the expansion deformation that occurs in the flange part of the winding spool is formed on the inner surface side of the extension part, the winding spool part expands and deforms outward during the winding process of the coil body. Even when the rotary plunger is rotated, the flange portion does not interfere with the extending portion, and the smooth rotation displacement of the rotary plunger can be maintained over a long period of time.

  1 to 3 (a) show a first embodiment of the present invention. The rotary solenoid 1 according to the present invention includes a shift lever lock device of a vehicle (AT car) equipped with an automatic transmission, a shade shielding plate for controlling light distribution of the low and high of a discharge type headlamp, and an irradiation direction up and down. It is used for driven parts such as a leveler that adjusts to the right and an AFS that adjusts the irradiation direction to the left and right. As shown in FIG. 1A, the bottomed cylindrical casing 2 of the rotary solenoid 1 has an upper plate 3 and a lower plate 4 attached to the upper end opening and the bottomed portion. Each member including the core shaft 5 and the rotating plunger 10) is disposed in a retaining state.

The rotating core shaft 5 made of a magnetic material is formed in a stepped shape having small diameter end portions 5a and 5b on the upper and lower sides and a large diameter portion 5c at the center, and is concentrically disposed in the casing 2. Yes.
The small diameter end portion 5a of the rotary core shaft 5 is located outside the upper plate 3 and is connected to a shift lever lock device, a shielding plate for a discharge type headlamp, a leveler, or a driven portion such as an AFS. It is. An upper bearing 6 and a lower bearing 7 are provided at the central portions of the upper plate 3 and the lower plate 4, and rotatably support the small-diameter end portions 5a and 5b of the rotating core shaft 5, respectively.

The yoke 8, which is a magnetic body, is formed of a support plate portion 8 a that is formed in a vertically long shape and has a substantially arc-shaped cross section, and is substantially concentrically around the rotary core shaft 5 in a state inscribed inside the casing 2. It is provided in places (for example, three places).
The star-shaped rotary plunger 10 is formed of the same material as the rotary core shaft 5 and is attached to small diameter end portions 5 a and 5 b which are outer peripheral portions of the rotary core shaft 5, and interlocks with the rotational displacement of the rotary core shaft 5. It is supposed to be.

  The rotary plunger 10 is provided so that the longitudinal section is substantially L-shaped from the extending portion 10a and the vertical arm portion 10b. The extending portion 10 a is formed to extend in the radial direction of the rotating core shaft 5. The vertical arm portion 10 b is juxtaposed so that the tip end portion thereof is substantially perpendicular to the extending portion 10 a and is directed in the axial direction of the rotary core shaft 5. The vertical arm portion 10b is curved in an arc shape along the circumferential direction, and the outer peripheral surface is opposed to the inner peripheral surface 8c of the support plate portion 8a via the minute gap G.

  A torsion coil spring Sq is attached as a biasing member to the small-diameter end portion 5b of the rotating core shaft 5, and the vertical arm portion 10b of the extending portion 10a and the support plate portion 8a overlap with each other through a minute gap G. The extension portion 10a is biased to the initial position T rotated in the direction of reducing the mutual overlap portion {see (b) of FIG. 1}. The rotating plunger 10 rotates in the circumferential direction from the initial position T to the stop position S where the mutually overlapping portion increases by a predetermined amount against the urging force of the torsion coil spring Sq.

  As shown in FIG. 2, the circumferential thickness u of the support plate portion 8a is uniform from the initial position T in the direction in which the mutual overlapping portion increases, and the width of the minute gap G (for example, 0.3 mm). -1.0 mm) is set at an equal distance along the stop position S from the initial position T where the rotary plunger 10 is located.

  The winding spool 12 is made of plastic, and includes a cylindrical tube portion 12a around which the coil body 13 is wound, and flanges 12b and 12c integrally formed at both ends of the tube portion 12a. The winding spool 12 is loosely fitted to the large-diameter portion 5c of the rotating core shaft 5 with the tube portion 12a having the flange portions 12b and 12c close to the inner peripheral surface of the extending portion 10a.

  Between the upper plate 3 and the flange 12b, the lower end of the upper support bar 14 is provided so as to contact the flange 12b, and between the lower plate 4 and the flange 12c, the upper end of the lower support bar 15 is provided. Is provided so as to abut against the flange 12c. As a result, the winding spool 12 is sandwiched between the upper support bar 14 and the lower support bar 15 via the flanges 12b and 12c, and the rotating core shaft 5 is allowed to freely rotate within the tube part 12a. Yes.

  On the inner surface side of the extending portion 10a in the rotary plunger 10, an escape portion 16 is provided that serves as a relief of the expansion deformation that occurs in the flange portions 12b and 12c for the reason described later. As shown in FIG. 3A, the escape portion 16 is formed outward from the inner surface side of the extending portion 10a, and constitutes a tapered portion that is inclined so as to gradually reduce the thickness w of the extending portion 10a. . At this time, by reducing the inner surface side of the vertical arm portion 10 b, the overall thickness is reduced to form a secondary escape portion 16 </ b> A continuous with the escape portion 16. The escape portion 16 creates a margin space Dp between the inner surface side of the extending portion 10a and the flange portion 12b (12c), and the secondary escape portion 16A causes the inner surface side of the vertical arm portion 10b and the flange portion 12b (12c). The surplus space Dq is secured between the adjacent edge portions of the two.

When the coil body 13 is energized, a magnetic circuit is formed in a loop shape from the extending portion 10 a and the vertical arm portion 10 b of the rotary plunger 10 to the support plate portion 8 a of the yoke 8. By forming the magnetic circuit, an electromagnetic attraction force is applied between the vertical arm portion 10 b of the rotary plunger 10 and the support plate portion 8 a to attract the extension portion 10 a to the support plate portion 8 a of the yoke 8.
As a result, the extending portion 10a of the rotating plunger 10 is rotated in the circumferential direction from the initial position T to the stop position S against the biasing force of the torsion coil spring Sq, thereby applying a rotating force to the rotating core shaft 5. {See arrow B in Fig. 1 (b)}.

  At this time, the operation of the shift lever lock device, the shade shielding plate that controls the light distribution of the low and high of the discharge headlamp, the leveler that adjusts the irradiation direction up and down, or the driven part such as AFS is controlled. When the coil body 13 is not energized, the electromagnetic attractive force between the extending portion 10a and the support plate portion 8a disappears, so that the extending portion 10a is moved from the stop position S to the initial position by the biasing force of the torsion coil spring Sq. Returning to T, the driven part is returned to the original state (see arrow A in FIG. 1B).

A pin (not shown) protrudes from the outer peripheral side surface of the rotary core shaft 5 and the pin abuts against a stopper (not shown) on the yoke 8 side. Excessive rotation exceeding may be prevented. This pin may be formed on the yoke 8 side opposite to the above, and a stopper may be provided on the outer peripheral side surface portion of the rotary core shaft 5.
Instead of these pins and stoppers, the upper support rod 14 and the lower support rod 15 may be brought into contact with the outer surface of the extension portion 10a to provide a function of preventing the extension portion 10a from excessively rotating.

  In the above configuration, when the coil body 13 is energized, an electromagnetic attraction force is exerted from the extending portion 10a to the support plate portion 8a of the yoke 8 by the flow of magnetic flux from the extending portion 10a toward the support plate portion 8a of the yoke 8. It becomes possible to work evenly, and the rotary plunger 10 can be reliably rotated from the initial position T to the stop position S with a large rotational torque without unevenness, and the responsiveness to the operation of the driven part is improved. Can do.

By the way, the winding spool 12 is usually made of plastic, and in the process of winding the coil body 13 around the winding spool 12 in a plurality of layers, the flanges 12b and 12c are as shown in FIG. In addition, the coil body 13 may be deformed in the direction of spreading outward due to the lamination pressure of the coil body 13, and may contact and interfere with the extending portion 10 a.
In particular, in the case of reducing the thickness in the axial direction, the axial length of the winding spool 12 increases in the radial direction, so that the number of winding layers of the coil body 13 increases and the lamination pressure (winding pressure) also increases. The flanges 12b and 12c of the wire spool 12 tend to be easily expanded.

In order to prevent the interference of the flanges 12b and 12c with the extending part 10a and the vertical arm part 10b of the rotary plunger 10, as shown in FIG. 3C, the extending part 10a and the vertical arm part 10b are outward. It may be possible to extend the physique by expanding it.
Thereby, clearance e1, e2 comes to be obtained between the front-end | tip part of the collar parts 12b and 12c, and the inner surface part of the extension part 10a and the vertical arm part 10b, and the collar with respect to the extension part 10a and the vertical arm part 10b Interference between the parts 12b and 12c can be eliminated.

In this case, the larger the flanges 12b and 12c of the winding spool 12 are, the larger the clearances e1 and e2 need to be secured. Therefore, the extension portion 10a and the vertical arm portion 10b only extend outward. The weight of the rotary plunger 10 increases and a large moment of inertia is required.
For this reason, when the rotary plunger 10 is mounted on a vehicle and the rotary plunger 10 receives a large vibration during traveling of the vehicle, the rotary plunger 10 may be unintentionally rotated and displaced, leading to a malfunction.

  On the other hand, in the said structure, the escape part 16 used as the escape of the expansion deformation which arises in the collar parts 12b and 12c of the winding spool 12 is formed in the inner surface side of the extension part 10a. For this reason, even if the flanges 12b and 12c of the winding spool 12 are expanded outwardly in the winding process of the coil body 13, the flanges 12b and 12c are not moved when the rotary plunger 10 is rotated. The smooth rotation displacement of the rotary plunger 10 can be maintained over a long period of time without interfering with the extending portion 10a.

In addition, since the escape portion 16 is formed by reducing the inner surface side of the extension portion 10a, the extension portion 10a does not expand outward, and the whole is not enlarged, contributing to space saving. Miniaturization can be maintained.
Along with this, the moment of inertia of the rotary plunger 10 does not increase, and even if the vehicle is subjected to large vibrations during traveling of the vehicle, the rotary plunger 10 is not inadvertently rotated and displaced, and no malfunction occurs. Good regular function can be maintained without hindrance.

  By forming the escape portion 16, the magnetic flux of the magnetic circuit branches along the three extending portions 10a from the rotating core shaft 5 while reducing the thickness w of the extending portion 10a. Divide without delay. That is, as the number of the extending portions 10a increases, the amount of magnetic flux flowing in each magnetic circuit decreases. Thereby, even if the thickness w of the extension part 10a is reduced, the magnetic flux of the magnetic circuit can be efficiently passed through the support plate part 8a of the yoke 8 without causing magnetic saturation in the extension part 10a.

  The basic structure is a simple structure in which the rotating core shaft 5, the coil body 13, the rotating plunger 10 and the yoke 8 are provided in the casing 2, which is advantageous in terms of cost, can save space, is excellent in mass productivity, and is mass-produced. This is suitable as a rotary solenoid 1 mounted on a vehicle that requires production.

  FIG. 4A shows Example 2 of the present invention. The difference between the second embodiment and the first embodiment is that the escape portion 17 is provided so as to be recessed as a reduction portion. The escape portion 17 is formed so that the inner surface side of the extending portion 10a is reduced and the thickness w1 is reduced.

  FIG. 4B shows Example 3 of the present invention. The third embodiment differs from the first embodiment in that the escape portion 18 is provided as a two-stage reduction step portion. The escape portion 18 is formed in such a manner that the inner surface side of the extending portion 10a is recessed in two stages so that the amount of reduction increases toward the outside, and the thickness w2 is gradually reduced.

  FIG. 4C shows a fourth embodiment of the present invention. The fourth embodiment is different from the first embodiment in that the escape portion 19 is provided as a multistage reduction step portion. The escape portion 19 is formed such that the inner surface side of the extending portion 10a is recessed in four steps, for example, so that the amount of reduction increases toward the outside, and the thickness w3 is gradually reduced.

FIG. 4 (d) shows Example 5 of the present invention. The difference between the fifth embodiment and the first embodiment is that the escape portion 20 is provided as a curved surface portion. The escape portion 20 is formed outward from the inner surface side of the extension portion 10a, and is gently curved along a conical curved surface such as a paraboloid so that the thickness w4 of the extension portion 10a is gradually reduced. Is.
Even if the escape portions 17 to 20 as in the embodiments 2 to 5 are formed, the same effects as those in the embodiment 1 can be obtained.

FIG. 5 shows modifications of the first, third, fourth, and fifth embodiments of the present invention.
In Modification 1 of FIG. 5A, the thickness Wt of the extending portion 10a is set to be small in advance by reducing the inner surface side, and the magnetic filling pad 21 corresponding to the tapered portion of the escape portion 16 of Example 1 is provided. It is prepared as a washer or packing, and is attached in close contact with the inner surface side 10f of the extending portion 10a. In the second modification of FIG. 5B, the filling pad 22 corresponding to the reduced stepped portion of the escape portion 18 of the third embodiment is prepared as a washer or packing, and is attached in close contact with the inner surface side 10f of the extending portion 10a. Yes.

In Modification 3 of FIG. 5C, the filling pad 23 corresponding to the four reduction steps in the escape portion 19 of Example 4 is prepared as a washer and packing, and is in close contact with the inner surface side 10 f of the extension 10 a. Installed on.
In Modification 4 of FIG. 5D, the filling pad 24 corresponding to the multi-stage reduction step portion in the escape portion 20 of Embodiment 5 is prepared as a washer or packing, and is in close contact with the inner surface side 10f of the extension portion 10a. It is installed.

  FIG. 6 shows Embodiment 6 of the present invention. Example 6 differs from Example 1 in that a member corresponding to the vertical arm portion 10b of the extending portion 10a is omitted from the rotary plunger 10. For this reason, a minute gap G is formed between the arc-shaped outer peripheral surface 10 c of the extending portion 10 a and the inner peripheral surface 8 c of the support plate portion 8 a of the yoke 8.

  In this case, as the coil body 13 is energized, the magnetic flux of the magnetic circuit passes through the rotary core shaft 5 and draws a closed loop that returns to the rotary core shaft 5 via the extension portion 10a and the support plate portion 8a. A similar electromagnetic attractive force is generated. For this reason, the effect similar to Example 1 is acquired also in Example 6. FIG.

(Example of use)
FIG. 7 shows an example in which the rotary solenoid 1 of the present invention is applied to a discharge type headlamp 25 of a vehicle. In this case, the rotary solenoid 1 is installed on a support member (not shown), and functions to switch the discharge valve 26 of the shade between the high and low two positions as light distribution adjustment of the discharge type headlamp 25. To do. The rotary core shaft 5 of the rotary solenoid 1 is coaxially connected to a support shaft 28 of a rectangular shielding plate 27. The shielding plate 27 is fixed to the support shaft 28 via the pivot portion 27a at the low position immediately before the discharge bulb 26.

A torsion coil spring 29 that rotates and biases the shielding plate 27 is wound around the support shaft 28. One end portion 29a of the torsion coil spring 29 is in contact with the inner side of the shielding plate 27, and the other end portion 29b is in contact with the lower surface portion of the discharge bulb 26 via an extension portion (not shown) from the support member. Yes. As a result, the shielding plate 27 is urged in the direction of the low position by the torsion coil spring 29.
When the coil body 13 (see FIG. 1) of the rotary solenoid 1 is energized, the rotating core shaft 5 rotates in the direction of the arrow B together with the support shaft 28 against the urging force of the torsion coil spring 29, and increases from the low position to the high position. Switch to position.

In the case of this use example, the connection between the rotary core shaft 5 and the support shaft 28 can be achieved by providing a simple connection structure. Therefore, a link mechanism for converting linear operation into rotation is not required, which is advantageous in terms of cost and saved. Contributes to space.
Since the discharge bulb 26 of the discharge type headlamp 25 is an example of a light source, a light source such as a filament of an incandescent bulb such as a discharge light emitting unit or a halogen bulb may be used instead of the discharge bulb 26.

  Since the torsion coil spring 29 of the use example is provided on the support shaft 28 of the shielding plate 27, the same torsion coil spring Sq may not be provided on the rotary solenoid 1 side where the rotary core shaft 5 is disposed. That is, the torsion coil spring may be provided on either the rotary solenoid 1 side or the support shaft 28 of the shielding plate 27.

(A) In the above embodiment, the torsion coil spring Sq is used as the urging member, but a compression spring, a tension spring, or an elastic member such as rubber may be used.
(B) The rotation angle from the initial position T to the stop position S is not limited to 35 degrees, and may be changed as desired, for example, 25 degrees, 30 degrees, 45 degrees, or 50 degrees. About the initial position T and the stop position S, you may change as desired by changing the mutual overlap part which the vertical arm part 10b and the support plate part 8a of the extension part 10a overlap through the micro space | gap G. FIG.

(C) The circumferential thickness u of the support plate portion 8a is not limited to a constant value, and is set so as to gradually increase from the initial position T in the direction in which the mutual overlap portion increases, and the width dimension of the minute gap G is set to the rotary plunger. You may make it gradually reduce toward the stop position S from the initial position T in which 10 is located. In this case, since the vertical arm portion 10b and the support plate portion 8a of the extending portion 10a are narrowed from the initial position T toward the stop position S, the rotary plunger 10 moves in the direction of the stop position S. As it rotates, the electromagnetic attraction force acting on the support plate portion 8a from the vertical arm portion 10b gradually increases and is efficiently converted to rotational torque, contributing to uniform rotational torque.

(D) The width dimension of the minute gap G set between the vertical arm portion 10b of the rotary plunger 10 and the support plate portion 8a of the yoke 8 may be changed as desired according to the use situation and application object. Good. (E) Although the rotation plunger 10 is provided one by one above and below the rotation core shaft 5, only one of the rotation plungers 10 may be provided depending on the use situation, the attachment target, and the like.
(F) The number of the extending portions 10a in the rotary plunger 10 and the number of the supporting plate portions 8a in the yoke 8 are not limited to three or four, and a desired number may be provided as necessary.
(G) The winding spool 12 is not limited to plastic, but may be made of metal such as iron or aluminum or an alloy based on various metals.

  The rotary solenoid according to the present invention has a relatively simple structure, such as a shift lever locking device of a vehicle (AT car) equipped with an automatic transmission, and shade shielding for controlling light distribution of the low and high of a discharge type headlamp. It is applied to a plate, a leveler that adjusts the irradiation direction up and down, and an AFS that adjusts the irradiation direction left and right. Massive production is required because it has a simple configuration, does not cause malfunction of the rotating plunger, has a beneficial effect of obtaining a large rotational force without torque unevenness, and is advantageous in terms of cost, can save space, and is excellent in mass productivity. It is suitable as a rotary solenoid mounted on a vehicle, and can stimulate demand for vehicle-related business and contribute to the machinery industry through parts distribution.

(A) is a longitudinal cross-sectional view (Example 1) of a rotary solenoid, (b) is a perspective view which shows a rotation core axis | shaft, a yoke, and a rotation plunger (Example 1). (Example 1) which is a top view which shows a rotation core axis | shaft, a yoke, and a rotation plunger. (A) is a longitudinal cross-sectional view (Example 1) which shows the principal part, (b) and (c) are longitudinal cross-sectional views which show a principal part (comparative example). (A)-(d) is a longitudinal cross-sectional view (Examples 2-5) of the principal part which shows the shape of an escape part, respectively. (A)-(d) is a longitudinal cross-sectional view of the principal part which shows the modification 1-4 of Example 1, 3, 4, 5 as a filling pad. (Example 6) which is a longitudinal cross-sectional view of a rotary solenoid. It is a perspective view which shows the usage example which applied the rotary solenoid to the discharge type headlamp of the vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotary solenoid 2 Casing 5 Rotating core shaft 8 Yoke 8a Support plate part of yoke 8c Inner peripheral surface of support plate part 10 Rotating plunger 10a Extension part 10b Vertical arm part 10c Outer peripheral surface of extension part 10f Inner surface of extension part Side 12 Winding spool 12a Pipe portion 12b, 12c collar 13 coil body 16, 20 escape portion 17 escape portion (reduction portion)
18, 19 Escape section (reduction step section)
16A Secondary escape part 21-24 Filling pad 27 Shading shielding plate (driven part)
Sq Torsion coil spring (biasing member)
G Minute gap S Stop position T Initial position u Thickness in the circumferential direction of the support plate

Claims (8)

A rotating core shaft provided rotatably in the casing and coupled to the driven part;
A yoke comprising a plurality of support plate portions arranged substantially concentrically around the rotating core shaft in the casing and having a substantially arc-shaped cross section;
An extended portion that is provided on the outer peripheral portion of the rotary core shaft so as to be interlocked with the rotational displacement of the rotary core shaft and that extends in the radial direction of the rotary core shaft is formed with a small distance from the inner peripheral surface of the support plate portion. A rotating plunger adapted to face each other through a gap;
A cylindrical tube wound with a coil body and flanges formed at both ends of the tube, the tube being in a state where the flange is close to the inner surface side of the extension part, A winding spool that is attached in a loosely-fitted state so that the rotary core shaft can freely rotate, and that generates an electromagnetic attractive force between the extension portion and the support plate portion by energizing the coil body;
When the coil body is not energized, it is biased to an initial position where the extension portion is rotated in a direction to reduce a mutual overlapping portion where the extension portion and the support plate portion overlap with each other through the minute gap. An urging member to perform,
An escape portion that is formed on the inner surface side of the extension portion and serves as a relief of expansion deformation that occurs in the flange portion of the winding spool, and avoids interference of the flange portion with the extension portion when the rotary plunger rotates. And
When the coil body is energized, the electromagnetic plunger attracts the rotary plunger against the biasing force of the biasing member in the circumferential direction from the initial position to a stop position where the mutual overlap portion increases by a predetermined amount. A rotary solenoid that is rotated to apply a rotational force to the rotary core shaft.   The extension portion has a substantially inverted L-shaped vertical cross section together with a vertical arm portion formed so as to be substantially perpendicular to the extension portion and directed in the axial direction of the rotary core shaft, and the vertical arm portion The rotary solenoid according to claim 1, wherein the outer peripheral surface of the support plate is opposed to the inner peripheral surface of the support plate portion via a minute gap.   2. The rotary solenoid according to claim 1, further comprising a secondary escape portion that is continuous with the escape portion by reducing at least a part of the inner surface side of the vertical arm portion to reduce the thickness thereof.   2. The rotary according to claim 1, wherein the escape portion is a tapered portion that is formed outward from an inner surface side of the extension portion and is inclined so as to gradually reduce the thickness of the extension portion. solenoid.   2. The rotary solenoid according to claim 1, wherein the escape portion is a reduction portion in which a thickness is reduced by reducing at least a part of an inner surface side of the extension portion, thereby providing a step.   The said escape part is a reduction | restoration step part which divided into several steps and reduced thickness so that the quantity which reduces the inner surface side of the said extension part may become large outside, The reduction | restoration step part of Claim 1 characterized by the above-mentioned. Rotary solenoid.   2. The escape portion is a curved surface portion that is formed outward from an inner surface side of the extension portion, and is curved so as to continuously and gradually reduce the thickness of the extension portion. The rotary solenoid described in 1.   6. The rotary solenoid according to claim 5, wherein the escape portion is formed with a step by attaching a filling pad made of a magnetic material on an inner surface side of the extension portion.

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