JP6331426B2 - Door check device - Google Patents

Description

  The present invention relates to a door check device.

  The door check device is configured to generate a resistance force to the door opening / closing operation (hereinafter, this force is referred to as a holding force). The door opens and closes by inputting an opening / closing operation force stronger than the holding force to the door. The door check device is mounted on a vehicle, for example. In this case, the door check device is provided between a vehicle body having an opening for passengers to get on and off and a vehicle door attached to the vehicle body so that the opening can be opened and closed. By installing a door check device on the vehicle, for example, when the vehicle door is opened at a predetermined opening on a slope, the vehicle door closes unexpectedly, or the vehicle door is blown by wind or the like. An opening / closing operation contrary to the intention of the vehicle door, such as opening a larger opening from the desired opening, can be prevented.

  A general door check device applied to a vehicle is configured to generate a large holding force when the vehicle door is opened at a predetermined opening, and is generated when the vehicle door is opened at any other opening. Holding power is small. For example, the door check device is configured so that a large holding force is generated when the opening degree of the vehicle door is 30 ° and 60 °. However, the optimum opening for generating a large holding force differs depending on the physique of the occupant and the surrounding environment of the vehicle (for example, the distance between adjacent vehicles). Therefore, there is a need for a door check device that can generate a large holding force at an arbitrary opening position where the user stops the opening and closing operation of the vehicle door.

  Patent Document 1 discloses a door check device capable of generating a large holding force when the door opening / closing operation is stopped at an arbitrary opening position. The door check device includes a cylinder in which a fluid is sealed, a piston disposed in the cylinder, a rod inserted into the cylinder and connected to the piston, and a valve unit provided in the piston. Is provided. When the valve unit is closed, the flow of fluid in the cylinder via the piston is blocked, and when the valve unit is opened, the flow of fluid is permitted. The rod is configured to move in the axial direction as the door is opened and closed. When opening and closing the door, the door is opened and closed with a force greater than the valve opening pressure (holding force) of the valve unit. When the door is opened and closed with a force larger than the valve opening pressure, the rod moves in the axial direction and the piston moves in the cylinder. As the piston moves, the fluid pressure in the cylinder member exceeds the valve opening pressure, and the valve unit opens. As a result, the fluid inside the cylinder flows and the fluid pressure decreases, so that the door opens and closes smoothly. When the opening / closing operation of the door is stopped at an arbitrary opening position, the valve unit is closed so that the fluid flow in the cylinder is again blocked. As a result, the door check device again generates a large holding force corresponding to the valve opening pressure.

  In Patent Document 2, two disk-shaped magnets are arranged in parallel, and a resistance force to the relative rotation of the two disk-shaped magnets is generated by using the attractive force and the repulsive force between the magnets. A constructed magnetic rotary damper is disclosed. By applying this magnetic rotary damper to the door check device, a large resistance force acts on the door as a holding force when the door is at a predetermined opening position. By increasing the frequency of generating a large resistance force per one opening / closing operation of the door, it is possible to configure a door check device in which a large holding force is generated at an arbitrary opening position.

  Patent Document 3 discloses a door check device in which a permanent magnet is provided in a check guide that contacts a check bar, and an electromagnet is provided in a check case that houses the check guide. By energizing the electromagnet when the door is at an arbitrary opening position, a repulsive force is generated between the electromagnet and the magnet. The generated repulsive force works as a holding force for the door.

Japanese Patent No. 4048158 JP 2005-265174 A Japanese Utility Model Publication No. 6-49128

(Problems to be solved by the invention)
The door check device described in Patent Document 1 requires a large number of components such as a valve unit, a cylinder, and a piston, and a fluid seal structure must be provided in the cylinder. It is large and heavy. Therefore, the manufacturing cost is high. Moreover, since the magnet type rotary damper described in Patent Document 2 uses two magnets, the cost required for the magnets is high. Moreover, since the door check apparatus described in Patent Document 3 requires energization control, the manufacturing cost is high.

  An object of the present invention is to provide a door check device configured to generate a large holding force at an arbitrary opening position with a simple configuration.

(Means for solving the problem)
The present invention includes a case member (2) attached to a door (DR) connected to the structure so that an opening (OP) formed in the structure (B) can be opened and closed; A check rod (3) that moves relative to the case member in the axial direction in accordance with the opening and closing operation, a stator member (4) fixed in the case member, and a rotatable member in the case member, A rotor member (5) coupled to the check rod so as to rotate with the axial movement of the check rod, and either the stator member or the rotor member includes the magnet (4) and the other is a magnetic body. (52) and a door check device in which the stator member and the rotor member are disposed in the case member so that the magnetic material crosses the magnetic flux of the magnet when the rotor member rotates.

  According to the present invention, when the check rod moves axially relative to the case member in accordance with the opening / closing operation of the door, the rotor member operatively connected to the check rod rotates in the case member. At this time, the magnetic body operates relative to the magnet so that the magnetic body provided on either of the rotor member and the stator member crosses the magnetic flux of the magnet. When the magnetic body crosses the magnetic flux, the amount of magnetic flux passing through the magnetic body changes. Due to the change in the amount of magnetic flux passing through the magnetic body, a reaction force against the operation of the magnetic body is repeatedly generated each time the rotor member rotates once. The generated reaction force acts on the rotor member as a large resistance against the rotation of the rotor member. Such a resistance force acts on the door as a holding force.

  Further, by converting the linear movement operation of the check rod into the rotation operation of the rotor member so that the rotor member rotates a plurality of times with respect to the axial movement of the check rod, a plurality of times of opening / closing operations of the series of doors are performed. A reaction force peak can be generated. By increasing the occurrence frequency of the reaction force peak, a large holding force can be generated in a pseudo manner when the door is stopped at an arbitrary opening position.

  As described above, the door check device according to the present invention is configured so that the magnetic body provided on one of the rotor member and the stator member crosses the magnetic flux of the magnet provided on the other when the rotor member rotates. It has a simple structure in which the member and the stator member are disposed in the case member, and a large holding force can be generated at an arbitrary opening position. Moreover, since two magnets are not required to generate the holding force, the cost required for the magnets can be reduced, and thus the manufacturing cost of the door check device can be reduced. In addition, the door check device according to the present invention is configured to generate a holding force while maintaining a non-contact state between the stator member and the rotor member by a magnetic force, so that no abnormal noise such as an operating noise is generated. The component parts do not deteriorate due to wear, and the holding force does not fluctuate due to humidity, wetness or the like. Therefore, it is possible to provide a door check device that can withstand various environmental changes.

  In the present invention, “the magnetic material crosses the magnetic flux” means that the magnetic material operates so that the magnetic material newly enters the magnetic material or retreats from the magnetic material by the relative operation of the magnetic material with respect to the magnet. The magnetic flux passing through the magnetic body increases or decreases. Therefore, even when the magnetic body is operating along a direction perpendicular to the direction of the magnetic flux, it is not said that the magnetic body does not cross the magnetic flux unless a magnetic flux newly enters the magnetic body. For example, it is not said that the magnetic body crosses the magnetic flux only by rotating the ring-shaped magnetic body along the direction perpendicular to the magnetic flux.

  A screw / nut mechanism or a rack and pinion mechanism may be employed in order to operatively rotate the rotor member as the check rod moves in the axial direction. When the screw / nut mechanism is employed, for example, a male screw is formed on the check rod, and a female screw that is screwed onto the male screw is formed on the rotor member. When the rack and pinion mechanism is employed, for example, rack teeth are formed on the check rod, and the rotor member is coupled to the pinion gear so as to be coaxial with and integrally rotatable with the pinion gear meshing with the rack teeth. Such a conversion member that converts linear motion into rotational motion may be formed directly on the check rod and the rotor member, or may be interposed between the check rod and the rotor member.

Further, in the present invention, the magnet, as poles in face-to-face position with the rotor member position changes facing the magnetic body as it rotates is changed alternately, that is arranged facing the magnetic material. According to this, the facing position between the magnet and the magnetic body changes as the rotor member rotates, so that the magnetic body operates relative to the magnet so as to cross the magnetic flux of the magnet.

In the present invention, it comprises a stator member a magnet, the rotor member Ru is configured to include a magnetic material. In this case, the stator member is preferably formed in a ring shape, and has a ring magnet (4) configured such that the magnetic poles are alternately changed at equal intervals along the circumferential direction. Further, the rotor member is disposed on the inner peripheral side of the ring magnet, and has a cylindrical rotor body (51a) having an outer peripheral surface (51a) facing the inner peripheral surface (4a) of the ring magnet and made of a nonmagnetic material. 51). And it is good for the magnetic body (52) to be attached to the outer peripheral surface of a rotor body.

  According to this, when the magnetic body attached to the outer peripheral surface of the rotor body together with the rotor body rotates, the facing state between the magnetic body and the inner peripheral surface of the ring magnet changes. Since the ring magnet is configured such that the magnetic poles are alternately and equally spaced along the circumferential direction, the magnetic body rotates so as to cross the magnetic flux of the ring magnet. For this reason, every time the rotor member makes one rotation, a reaction force is generated against the rotation of the magnetic body. As a result of the peak of the generated reaction force acting as a resistance against the rotation of the rotor member, a large holding force is generated.

  In this case, the plurality of magnetic bodies may be attached to the rotor body at regular intervals along the circumferential direction of the rotor body. The plurality of magnetic bodies may be attached to the rotor body so that the mounting angles of the plurality of magnetic bodies coincide with a magnetic pole angle representing a region in which the magnetic poles do not change along the circumferential direction of the ring magnet. According to this, as the rotor body rotates, the plurality of magnetic bodies simultaneously traverse the magnetic flux of the ring magnet. The magnitude of the obtained holding force is represented by the sum of reaction forces generated for each magnetic body. That is, the greater the number of magnetic bodies that cross the magnetic flux of the ring magnet, the greater the holding force. Therefore, a larger holding force can be generated by attaching a plurality of magnetic bodies to the rotor body. In addition, since the reaction force peaks can be generated as many times as the number of magnetic poles changing along the circumferential direction of the ring-shaped magnet during one rotation of the rotor member, the frequency of occurrence of the reaction force peaks can be further increased. Can be increased. Thereby, a large holding force can be generated reliably at an arbitrary opening position of the door.

  In the above, the “magnetic body mounting angle” means the mounting position of one magnetic body mounted on the outer peripheral surface of the rotor body and the magnetic body mounted on the outer peripheral surface of the rotor body adjacent to the magnetic body. It is a fan-shaped central angle which has the outer periphery circular arc of the rotor body which connects with the attachment position. This attachment angle can be obtained by dividing 360 ° representing one rotation by the number of magnetic bodies. For example, when four magnetic bodies are attached at equal intervals along the circumferential direction of the rotor member, the attachment angle of the magnetic body is 90 °.

  In addition, in the above, the “magnetic pole angle” represents a region where the magnetic pole does not change along the circumferential direction of the ring magnet, and this angle is formed by the same magnetic pole region formed continuously in the circumferential direction of the ring magnet. Equal to the center angle of a sector with a circular arc. This angle can be obtained by dividing 360 ° representing one rotation by the number of magnetic poles formed along the circumferential direction of the ring magnet. For example, when the ring magnet has four magnetic poles (N pole, S pole, N pole, S pole) along the circumferential direction, the pole angle is 90 °.

  Further, the stator member has a ring magnet formed in a ring shape and configured so that the magnetic poles alternately change at equal intervals along the circumferential direction, and there are two or more identical magnetic poles. May be configured to have a plurality of wings disposed on the inner peripheral side of the ring magnet and facing each other on the portion of the inner peripheral surface of the ring magnet that constitutes the same magnetic pole. According to this, when the magnetic body rotates, the facing state between the wing portion of the magnetic body and the inner peripheral surface of the ring magnet changes. Since the ring magnet is configured so that the magnetic poles are alternately and equally spaced along the circumferential direction, the plurality of wings of the magnetic body always rotate so as to face the same magnetic pole. Further, each wing part rotates so as to cross the magnetic flux of the ring magnet. For this reason, every time the rotor member makes one revolution, the reaction force peaks occur as many times as the number of magnetic poles changing along the circumferential direction of the ring magnet. The peak of the generated reaction force works as a large holding force.

  Further, the stator member has a ring-shaped magnet formed in a ring shape or a disk shape whose magnetic poles alternately change at equal intervals along the circumferential direction, and the rotor member has an outer peripheral surface (4b) of the ring-shaped magnet. The first magnetic body (711) arranged to face a part of the ring-shaped magnet and the second magnetic substance arranged to face the other part of the outer peripheral surface of the ring-shaped magnet and opposed to the first magnetic body with the ring-shaped magnet interposed therebetween A body (712) and a biasing member (72) coupled to the first magnetic body and the second magnetic body and biasing both the first magnetic body and the second magnetic body in a direction approaching the ring-shaped magnet. You may comprise so that it may have the magnetic body unit (7) which has. The magnetic body unit may be configured to be rotatable about the ring-shaped magnet and to move in a direction in which the first magnetic body and the second magnetic body are separated from the ring-shaped magnet by a rotational centrifugal force. .

  According to this, when the magnetic body unit rotates around the ring-shaped magnet as the rotor member rotates, the facing state between the first magnetic body and the outer peripheral surface of the ring-shaped magnet and the outer periphery of the second magnetic body and the ring-shaped magnet are increased. The facing state with the surface changes. Since the ring-shaped magnet is configured so that the magnetic poles are alternately and equally spaced along the circumferential direction, these magnetic bodies rotate so as to cross the magnetic flux of the ring-shaped magnet. For this reason, every time the magnetic body unit makes one rotation, a reaction force against the rotation operation of the magnetic body unit is generated. The peak of the generated reaction force works as a large holding force. In addition, a rotating centrifugal force is generated by the rotation of the magnetic body unit, and the first magnetic body and the second magnetic body move away from the ring magnet by the rotating centrifugal force. Therefore, the influence of the magnetic flux of the ring-shaped magnet on the first magnetic body and the second magnetic body during the opening / closing operation of the door, that is, during the rotation of the rotor member can be reduced. For this reason, it is possible to prevent a large holding force from being generated during the opening / closing operation of the door.

It is the schematic of the vehicle by which a door check apparatus is mounted. FIG. 2 is a detailed view of part A in FIG. 1. It is a disassembled perspective view of the door check apparatus which concerns on 1st Embodiment. It is a side view of the door check device concerning a 1st embodiment. It is a front view of a door check device concerning a 1st embodiment. It is AA sectional drawing of FIG. 3C. It is BB sectional drawing of FIG. 3D. It is a front view of a ring magnet. It is sectional drawing of a rotor member. It is a figure which shows the arrangement | positioning state of the ring magnet and rotor member in a case member. It is a figure which shows the change of the facing state of a ring magnet and a magnetic member. A graph showing the relationship between the force acting on the rotor member from the ring magnet and the rotation angle φ, and the ring magnet when the rotation angle φ is 0 °, 22.5 °, 45 °, 77.5 °, and 90 °; It is a figure which shows a facing state with a magnetic member. It is a graph which shows the relationship between the opening degree of a vehicle door, and holding force. It is a side view of the door check apparatus which concerns on 2nd Embodiment. It is a top view of a door check device concerning a 2nd embodiment. It is AA sectional drawing of FIG. 10A. It is BB sectional drawing of FIG. 10B. It is CC sectional drawing of FIG. 10C. It is a figure which shows the rotor member which concerns on a modification. It is a figure which shows the rotor member which concerns on another modification. It is a graph which shows the relationship between the rotation angle of a rotor member, and holding force. It is a top view of a door check device concerning a 3rd embodiment. It is a disassembled perspective view of each component accommodated in a case member and a case member. It is AA sectional drawing of the case member shown in FIG. It is BB sectional drawing of FIG. 13A. It is CC sectional drawing of FIG. 13A. It is a figure which shows the ring magnet which concerns on 3rd Embodiment. It is a figure which shows the change of the facing state of a magnetic body unit and a ring magnet. It is a figure which shows the state which the magnetic member moved to radial direction outward in the rotation plane of a rotor member.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of a vehicle equipped with a door check device. A vehicle V shown in FIG. 1 includes a vehicle body B (structure) and a vehicle door DR. A boarding opening OP is formed in a side portion of the vehicle body B. A pair of door hinges H, H are attached to the edge (front edge) FE of the opening OP in front of the vehicle along the vertical direction. The vehicle door DR is connected to the vehicle body B through a pair of door hinges H and H so as to be swingable. Therefore, the vehicle door DR is attached to the vehicle body B so that the opening OP formed in the vehicle body B can be opened and closed.

  FIG. 2 is a diagram showing in detail part A of FIG. As shown in FIG. 2, the pair of door hinges H and H include coaxial hinge shafts H1 and H1, respectively. When the vehicle door DR is opened and closed, the vehicle door DR swings with respect to the vehicle body B about the hinge shafts H1 and H1. Further, the bracket BR is fixed to the front edge part FE by fastening means such as a bolt. One end of a check bar 3 which is a component of the door check device according to the present embodiment is connected to the bracket BR via a pin P. A check rod 3 whose one end is swingably connected to the vehicle body B is a hole formed in the front end portion DE of the vehicle door DR, which is a portion facing the front edge portion FE of the vehicle body B when the vehicle door DR is fully closed. Via S, it extends into the vehicle door DR.

(First embodiment)
3A is an exploded perspective view of the door check device 1 according to the first embodiment, FIG. 3B is a side view of the door check device 1, FIG. 3C is a front view of the door check device 1, and FIG. 3D is an AA of FIG. Sectional drawing and FIG. 3E are BB sectional drawings of FIG. 3D. The door check device 1 is provided between the vehicle body B and the vehicle door DR, and is configured to generate a large holding force when the vehicle door DR is at an arbitrary opening position.

  The door check device 1 according to this embodiment includes a case member 2, a check rod 3, a ring magnet 4, and a rotor member 5. As shown in FIGS. 3A and 3D, the case member 2 includes a case main body 2a, a cover 2b, a front holding plate 2c, and a rear holding plate 2d. The case body 2a has a bottomed cylindrical shape with one end opened, and a circular hole is formed on the bottom surface. The cover 2b is formed in a plate shape, is put on the opening of the case body 2a, and is fastened to the case body 2a by a fastening member. A circular hole is also formed in the center of the cover 2b. The front holding plate 2c is covered with the cover 2b from the outside and is fixed to the cover 2b with a fastening member. A circular hole is also formed in the center of the front holding plate 2c. The rear holding plate 2d is placed on the bottom surface of the case body 2a from the outside and is fixed to the case body 2a with a fastening member. A circular hole is also formed at the center of the rear holding plate 2d. When these component parts (case body 2a, cover 2b, front holding plate 2c, rear holding plate 2d) are assembled to form a case member 2 having a hollow inside, circular holes formed in the respective component parts Are arranged coaxially. The check rod 3 is inserted into the case member 2 through these circular holes arranged coaxially.

  As described above, the check rod 3 is swingably connected to the vehicle body B at one end thereof. The check bar 3 extends into the vehicle door DR and is inserted into the case member 2 within the vehicle door DR. The other end of the check bar 3 is a free end and extends from the case member 2. The check bar 3 swings with respect to the vehicle body B when the vehicle door DR opens and closes and moves relative to the case member 2 in the axial direction. In the present embodiment, the check bar 3 is formed in a round bar shape, and a male screw 3a is formed on the side peripheral surface thereof. Since the swing center position of the check rod 3 and the swing center position of the vehicle door DR are different when the vehicle door DR is opened and closed, the check rod 3 swings with respect to the vehicle door DR when the vehicle door DR is opened and closed. While moving in the axial direction. For this reason, it is preferable that the case member 2 is swingably attached to the vehicle door DR so that the case member 2 can swing with the check rod 3 as the check rod 3 swings with respect to the vehicle door DR.

  As shown in FIGS. 3D and 3E, a ring magnet 4 as a stator member is disposed in the case member 2. The ring magnet 4 is a permanent magnet formed in a ring shape. The outer peripheral surface of the ring magnet 4 is fixed to the inner peripheral wall of the case body 2a. In addition, the stator member may be comprised only with the ring magnet 4, and may be comprised including the ring magnet 4 and other components.

  FIG. 4 is a front view of the ring magnet 4. As shown in FIG. 4, the ring magnet 4 is configured such that the magnetic poles alternately change at 90 ° intervals along the circumferential direction. That is, four magnetic poles are formed along the circumferential direction of the ring magnet 4 and an angle (magnetic pole angle) M representing a region where the magnetic poles do not change is 90 °. Therefore, the inner peripheral surface 4a of the ring magnet 4 is composed of four magnetic pole surfaces (two N pole surfaces and two S pole surfaces). The magnetic flux generated from the N-pole surface of the inner peripheral surface 4 a of the ring magnet 4 enters the adjacent S-pole surfaces through the inner peripheral space of the ring magnet 4.

  As shown well in FIGS. 3D and 3E, the rotor member 5 is disposed on the inner peripheral side of the ring magnet 4 in the case member 2. FIG. 5 is a cross-sectional view of the rotor member 5 shown in FIG. 3E. As shown in FIG. 5, the rotor member 5 includes a rotor body 51 formed of a non-magnetic material resin and a plurality (four in this embodiment) of magnetic members 52 (magnetic bodies) formed of a magnetic material. Have. The rotor body 51 is formed in a substantially cylindrical shape. A screw hole 51 a is formed along the axial direction of the rotor body 51 so as to penetrate the center of both end faces of the rotor body 51. The check rod 3 is inserted into the screw hole 51a in the case member 2, and the male screw 3a of the check rod 3 is screwed into a female screw formed on the inner wall of the screw hole 51a. Therefore, when the check bar 3 moves in the axial direction, the rotor member 5 rotates in the case member 2. That is, the check rod 3 and the rotor member 5 constitute a screw / nut mechanism that converts linear motion into rotational motion.

  As shown in FIG. 3D, a pair of bearings 9 and 9 are respectively attached to the outer periphery of both end portions of the rotor body 51 of the rotor member 5, and the rotor member 5 is connected to the case main body 2 a and the pair of bearings 9 and 9. It is attached to the cover 2b. In this way, the rotor member 5 is rotatably disposed in the case member 2.

  As shown in FIG. 5, four flat surfaces are formed at equal intervals (90 ° intervals) along the circumferential direction on the outer peripheral surface 51b of the rotor body 51, and a magnetic member 52 is mounted on each flat surface. It is done. The magnetic member 52 is preferably made of a ferromagnetic material. The magnetic member 52 has a fixed portion 52a and a core portion 52b, and has a T shape when viewed from the direction shown in FIG. The fixing portion 52 a is fixed to the rotor body 51 by pins or the like and extends from the fixing portion with the rotor body 51 to the outside of the rotor body 51. The core portion 52 b is connected to the fixed portion 52 a and exposed to the outer peripheral surface 51 b of the rotor body 51 and extends in the circumferential direction of the rotor body 51. Such a T-shaped magnetic member 52 is attached to the outer peripheral surface 51 b of the rotor body 51. The outer peripheral surface of the core part 52 b is formed in an arc shape having the same radius of curvature as that of the outer peripheral surface 51 b of the rotor body 51. In the present embodiment, four magnetic members 52 are intermittently attached to the outer peripheral surface 51 b of the rotor body 51 along the circumferential direction of the rotor body 51. Therefore, the outer peripheral surface of the rotor member 5 has a magnetic surface constituted by the core portion 52b of the magnetic member 52 and a nonmagnetic surface constituted by the rotor body 51, and the magnetic surface and the nonmagnetic surface along the circumferential direction. Are alternately formed.

  FIG. 6 is a view showing an arrangement state of the ring magnet 4 and the rotor member 5 in the case member 2. As shown in FIG. 6, the ring magnet 4 and the rotor member 5 are disposed concentrically. The rotor body 51 is disposed on the inner peripheral side of the ring magnet 4, and the outer peripheral surface 51 b faces the inner peripheral surface 4 a of the ring magnet 4 with a slight gap therebetween. The outer peripheral surfaces of the plurality of magnetic members 52 attached to the outer peripheral surface 51 b of the rotor body 51 also face the inner peripheral surface 4 a of the ring magnet 4 with a slight gap therebetween. Therefore, the outer peripheral surface of the magnetic member 52 forms the magnetic pole facing surface 521, and this magnetic pole facing surface 521 faces the magnetic pole surface of the ring magnet 4. When the rotor member 5 rotates with respect to the ring magnet 4, the facing position between the magnetic pole facing surface 521 and the inner peripheral surface (magnetic pole surface) of the ring magnet 4 changes, and the magnetic pole (magnetic pole surface) of the ring magnet 4 at the facing position. Alternately change.

  As described above, the magnetic pole angle M of the ring magnet 4 is 90 °. In addition, the mounting angle of the magnetic member 52 (the mounting position of one magnetic member 52 mounted on the outer peripheral surface 51 b of the rotor body 51 and the magnet mounted on the outer peripheral surface of the rotor body 51 adjacent to the magnetic member 52. The fan-shaped central angle J of the rotor body 51 connecting the mounting position of the member 52 is 90 °. That is, the magnetic pole angle M and the mounting angle J coincide.

  Further, the angle representing the arrangement region of the magnetic member 52 attached to the outer peripheral surface 51b of the rotor body 51, that is, the central angle of the sector having the outer peripheral arc of the core portion 52b of the magnetic member 52, in other words, the core portion 52b. The angle between a line segment L1 connecting one end in the longitudinal direction and the center O of the rotor body 51 and a line segment L2 connecting the other end in the longitudinal direction of the core 52b and the center O of the rotor body 51 (hereinafter referred to as this) In this embodiment, the angle is referred to as a magnetic body arrangement angle θ) is 45 °. The magnetic body arrangement angle θ is preferably smaller than the magnetic pole angle M. Moreover, the magnetic body arrangement angle θ can be set to an arbitrary angle. For example, when the magnetic pole angle M is 90 °, the magnetic body arrangement angle θ may be 30 ° or 60 °.

  The operation of the door check device 1 having the above configuration will be described below. When the vehicle door DR opens and closes, the check bar 3 moves relative to the case member 2 in the axial direction. When the check rod 3 moves in the axial direction, the rotor member 5 that is operatively connected to the check rod 3 by screwing with the male screw 3a of the check rod 3 is relative to the ring magnet 4 that is a stator member. Rotate. As the rotor member 5 rotates, the plurality of magnetic members 52 attached to the outer peripheral surface 51b of the rotor body 51 also rotate. As described above, the magnetic member 52 faces the inner peripheral surface 4a of the ring magnet 4, and the ring magnet 4 is configured such that the magnetic poles are alternately changed along the circumferential direction. When rotating relative to the magnet 4, the magnetic member 52 crosses the magnetic flux of the ring magnet 4. In the present embodiment, the lead of the male screw 3a formed on the check rod 3 is adjusted so that the rotor member 5 rotates several to several dozen per series of opening / closing operations of the vehicle door DR. The

FIG. 7 is a diagram illustrating a change in the facing state between the ring magnet 4 and the magnetic member 52. The facing state of the ring magnet 4 and the magnetic member 52 changes in the order of FIG. 7 (a) → FIG. 7 (b) → FIG. 7 (c) → FIG. 7 (d) → FIG.

  When the facing state of the ring magnet 4 and the magnetic member 52 is the state shown in FIG. 7A, the central portion in the circumferential direction of the magnetic pole facing surface 521 of the magnetic member 52 is the N pole surface and the S pole surface of the ring magnet 4. Facing the border position. In the state shown in FIG. 7A, the arrangement state of the magnetic member 52 with respect to the magnetic flux is most stable. At this time, the amount of magnetic flux passing through the magnetic member 52 is the largest. That is, the magnetic flux is most likely to pass through the magnetic member 52. Such a rotational position of the magnetic member 52 is referred to as a “stable position”. Further, the rotation angle φ of the rotor member 5 when the magnetic member 52 is at the rotation position as shown in FIG.

  When the rotor member 5 rotates in one direction along with the axial movement of the check bar 3 from when the rotation position of the magnetic member 52 is at the stable position, the facing position between the magnetic member 52 and the ring magnet 4 changes. Since the magnetic member 52 rotates so as to cross the magnetic flux of the ring magnet 4, the amount of magnetic flux passing through the magnetic member 52 changes. At this time, a reaction force against the rotation operation of the magnetic member 52, that is, a reaction force for returning the rotation position of the magnetic member 52 to the stable position acts on the magnetic member 52. Thereby, a resistance force against the rotation of the rotor member 5 acts on the rotor member 5. Such a reaction force acts as a holding force for the vehicle door DR. The magnitude of the reaction force is proportional to the amount of change (decrease) in the amount of magnetic flux passing through the magnetic member 52. The magnitude of the amount of change (decrease) in the amount of magnetic flux passing through the magnetic member 52 increases as the rotational position of the magnetic member 52 moves away from the stable position shown in FIG. Therefore, the reaction force increases as the rotational position of the magnetic member 52 moves away from the rotational position shown in FIG. Then, when the rotation angle φ of the rotor member 5 is 22.5 °, the magnitude of the reaction force reaches a peak. FIG. 7B shows the facing state of the ring magnet 4 and the magnetic member 52 when the rotation angle φ is 22.5 °. In the state shown in FIG. 7B, one end in the circumferential direction of the magnetic pole facing surface 521 of the magnetic member 52 faces the boundary position between the N pole surface and the S pole surface of the ring magnet 4. The rotational position of the magnetic member 52 when the magnitude of the reaction force is the peak value is referred to as “maximum reaction force generation position” in this specification.

  When the rotation position of the magnetic member 52 is the maximum reaction force generation position and the rotor member 5 further rotates in one direction, the facing position of the magnetic member 52 and the ring magnet 4 changes, and the magnetic member 52 Since the magnet 4 rotates so as to cross the magnetic flux, the amount of magnetic flux passing through the magnetic member 52 changes. However, since the amount of change (decrease amount) in the amount of magnetic flux decreases, the magnitude of the reaction force decreases. When the rotation angle φ of the rotor member 5 is 45 °, the magnitude of the reaction force becomes zero. FIG. 7C shows the facing state of the ring magnet 4 and the magnetic member 52 when the rotation angle φ is 45 °. Such a rotational position of the magnetic member 52 with respect to the ring magnet 4 is referred to as a “neutral position” in the present specification. When in the neutral position, the magnetic flux of the ring magnet 4 hardly passes through the magnetic member 52.

  When the rotor member 5 further rotates in one direction from the time when the rotation position of the magnetic member 52 is in the neutral position, the facing position between the magnetic member 52 and the ring magnet 4 changes, and the magnetic member 52 changes the magnetic flux of the ring magnet 4. Therefore, the amount of magnetic flux passing through the magnetic member 52 changes. At this time, the rotor member 5 receives a force from the ring magnet 4 to pull the magnetic member 52 to a closer stable position. That is, when the rotor member 5 tries to rotate from when the magnetic member 52 is in the neutral position, the rotor member 5 receives a propulsive force for the rotation from the ring magnet 4. The magnitude of the propulsive force is proportional to the amount of change (increase) in the amount of magnetic flux passing through the magnetic member 52. The amount of change (increase) in the amount of magnetic flux passing through the magnetic member 52 increases as the rotational position of the magnetic member 52 moves away from the neutral position. Therefore, the propulsive force increases as the rotational position of the magnetic member 52 moves away from the rotational position shown in FIG. 7C, and reaches a peak when the rotational angle φ of the rotor member 5 is 67.5 °. The rotational position of the magnetic member 52 when the magnitude of the propulsive force is at a peak is referred to as a “maximum propulsive force generation position” in this specification. FIG. 7D shows the facing state of the ring magnet 4 and the magnetic member 52 when the rotation angle φ is 67.5 °.

  When the rotor member 5 is further rotated in one direction by receiving the driving force of the ring magnet 4 from the time when the rotating position of the magnetic member 52 is the maximum driving force generating position, the facing position of the magnetic member 52 and the ring magnet 4 is As the magnetic member 52 changes, the magnetic member 52 rotates so as to cross the magnetic flux of the ring magnet 4, so that the amount of magnetic flux passing through the magnetic member 52 changes. However, since the amount of change (increase) in the amount of magnetic flux decreases, the propulsive force also decreases. When the rotation angle φ of the rotor member 5 reaches 90 °, the propulsive force becomes zero and the rotation position of the magnetic member 52 reaches the stable position again. FIG. 7E shows the facing state of the ring magnet 4 and the magnetic member 52 when the rotation angle φ is 90 °.

  FIG. 8 is a graph showing the relationship between the force (reaction force, propulsive force) acting on the rotor member 5 from the ring magnet 4 and the rotation angle φ, and the rotation angle φ is 0 °, 22.5 °, 45 °, 67 It is a figure which shows the facing state of the ring magnet 4 and the magnetic member 52 when it is 0.5 degree and 90 degrees. As shown in FIG. 8, the reaction force increases as the rotation angle φ increases from 0 ° to 22.5 °, and the reaction force is maximum when the rotation angle φ is 22.5 °. As the rotation angle φ increases from 22.5 ° to 45 °, the reaction force decreases. When the rotation angle φ is 45 °, the reaction force is zero. As the rotation angle increases from 45 ° to 67.5 °, the propulsive force (negative reaction force) increases, and the propulsive force is maximum when the rotation angle φ is 67.5 °. The propulsive force decreases as the rotation angle φ increases from 67.5 ° to 90 °. The propulsive force when the rotation angle φ is 90 ° is 0, and at this time, the rotational position of the magnetic member 52 reaches the stable position.

  Thus, according to the door check device 1 according to the present embodiment, as the rotor member 5 rotates, the facing position of the ring magnet 4 with respect to the magnetic member 52 changes, and the magnetic poles at the facing position change alternately. Further, the ring magnet 4 is disposed with respect to the rotor member 5. Each time the rotor member 5 rotates 90 ° with respect to the ring magnet 4, the reaction force reaches a peak and a large holding force is generated. That is, during the rotation of the rotor member 5, reaction force peaks of the same number (four times) as the number of magnetic poles formed along the circumferential direction of the ring magnet 4 are generated. Further, the axial movement of the check rod 3 is caused by the rotational movement of the rotor member 5 by a screw / nut mechanism (screw engagement between the male screw 3a of the check rod 3 and the female screw formed in the screw hole 51a of the rotor member 5). Is converted to Then, the lead of the male screw 3a is adjusted so that the rotor member 5 rotates several to several tens of times per one opening / closing operation of the vehicle door DR. For this reason, a very large number of reaction force peaks, that is, a large holding force, is generated per opening / closing operation of the vehicle door DR.

  FIG. 9 is a graph showing the relationship between the opening degree of the vehicle door and the holding force. As shown in FIG. 9, during the opening operation of the vehicle door DR from the fully closed state to the fully open state, the holding force reaches a peak at a plurality of opening positions, and a large holding force is generated. By increasing the number of occurrences (occurrence frequency) of the holding force peak per opening / closing operation of the vehicle door DR, a large holding force can be generated in a pseudo manner at an arbitrary opening / closing position (opening). it can. In this case, a large holding force is generated even at a plurality of positions other than an arbitrary opening / closing position (opening degree). However, during the opening / closing operation, the reaction force is canceled by the rotational inertial force of the rotor member 5 accompanying the opening / closing of the vehicle door DR. Therefore, the net holding power is reduced. Therefore, a large reaction force is not felt during the opening / closing operation. As a result, a door check device 1 that generates a large holding force at an arbitrary opening / closing position and that can smoothly open / close the vehicle door DR once the opening / closing operation of the vehicle door DR is started is configured. Can do.

(Second Embodiment)
Next, a second embodiment will be described. 10A to 10E are views showing a door check device 1 'according to the second embodiment. 10A is a side view of the door check device 1 ′, FIG. 10B is a plan view of the door check device 1 ′, FIG. 10C is a cross-sectional view along AA in FIG. 10A, FIG. 10D is a cross-sectional view along BB in FIG. FIG. 10C is a cross-sectional view taken along the line CC of FIG. 10C. The door check device 1 ′ is provided between the vehicle body B and the vehicle door DR, and is configured to generate a large holding force when the vehicle door DR is at an arbitrary opening position.

  The door check device 1 ′ according to the present embodiment includes a case member 2, a check rod 3, a ring magnet 4, a rotor member 5, and a rotating shaft 6. As shown in FIG. 10C, the case member 2 includes a case main body 2a in which a space for housing components is formed and one end face is opened, and a cover 2b that covers the opening of the case main body 2a. When the cover 2b closes the opening of the case body 2a with a fastening member or the like, the case member 2 having a hollow inside is configured.

  Through holes are formed in opposite side surfaces of the case body 2a, and a check rod 3 whose one end is swingably connected to the vehicle body B is inserted into the case member 2 from one of the through holes. At the same time, the check rod 3 extends from the other through hole to the outside of the case member 2. The other end of the check bar 3 is a free end. When the vehicle door DR is opened and closed, the check bar 3 swings with respect to the vehicle body B and moves relative to the case member 2 in the axial direction. As shown in FIGS. 10A, 10D, and 10E, the check rod 3 is formed with rack teeth 3b along the longitudinal direction thereof.

  As shown in FIG. 10C, the rotating shaft 6 is accommodated in the case member 2. Both ends of the rotating shaft 6 are rotatably supported by the case main body 2a and the cover 2b via bearing members. The rotating shaft 6 has a pinion gear portion 6a and a shaft portion 6b. The rack teeth 3 b formed on the check rod 3 mesh with the pinion gear portion 6 a of the rotating shaft 6 in the case member 2. Therefore, when the check bar 3 moves in the axial direction relative to the case member 2, the rotation shaft 6 is rotated around the axis due to the engagement between the rack teeth 3 b of the check bar 3 and the pinion gear portion 6 a of the rotation shaft 6. Rotate.

  As shown in FIG. 10E, the ring magnet 4 is disposed in the case member 2. The configuration of the ring magnet 4 and the arrangement state of the ring magnet 4 in the case member 2 are the same as the configuration of the ring magnet 4 and the arrangement state in the case member 2 described in the first embodiment. The description is omitted. Further, as shown in FIGS. 10C and 10E, the rotor member 5 is disposed on the inner peripheral side of the ring magnet 4 in the case member 2. The rotor member 5 is connected to a shaft portion 6b of the rotating shaft 6 so as to be integrally rotatable. Therefore, when the check rod 3 moves in the axial direction and the rotation shaft 6 rotates, the rotor member 5 rotates with the rotation shaft 6 as the rotation center axis. That is, the check rod 3, the rotating shaft 6, and the rotor member 5 constitute a rack and pinion mechanism that converts linear motion into rotational motion.

  As shown in FIG. 10E, a hole 51c is formed at the center of the resin rotor body 51, and the shaft portion 6b of the rotating shaft 6 is inserted into the hole 51c and fixed. For this reason, the rotating shaft 6 and the rotor body 51 rotate integrally. Since the other part of the rotor member 5 according to the present embodiment is the same as the rotor member 5 described in the first embodiment, the same parts are denoted by the same reference numerals and description thereof is omitted.

  In the door check device 1 ′ having the above configuration, when the vehicle door DR opens and closes, the check bar 3 moves relative to the case member 2 in the axial direction. When the check bar 3 moves in the axial direction, the rotary shaft 6 having the pinion gear portion 6a meshing with the rack teeth 3b of the check bar 3 rotates, and the rotor member 5 connected to the rotary shaft 6 rotates. As the rotor member 5 rotates, the magnetic member 52 attached to the outer periphery of the rotor body 51 also rotates. At this time, the facing position between the magnetic member 52 and the ring magnet 4 changes, and the magnetic member 52 rotates so as to cross the magnetic flux of the ring magnet 4. In the present embodiment, the rotor member 5 is configured to rotate several to several tens of rotations per series of opening / closing operations of the vehicle door DR by adjusting the diameter of the pinion gear portion 6a.

  The principle of the generation of the holding force by the door check device 1 ′ according to the present embodiment is the same as the principle of the generation of the holding force by the door check device 1 according to the first embodiment, and a specific description thereof will be omitted. However, in this embodiment as well, as in the first embodiment, every time the rotor member 5 rotates 90 °, the reaction force reaches a peak and a large holding force is generated. That is, four reaction force peaks occur during one rotation of the rotor member 5. In addition, since the diameter of the pinion gear portion 6a is adjusted so that the rotor member 5 rotates several to several tens of times for each opening / closing operation of the vehicle door DR, per opening / closing operation of the vehicle door DR. A very large number of reaction force peaks, i.e. large holding forces, occur. By increasing the number of occurrences of the peak of the holding force per one opening / closing operation of the vehicle door DR, a large holding force can be generated in a pseudo manner at an arbitrary opening / closing position. In this case, a large holding force is generated even at a position other than an arbitrary position. However, during the opening / closing operation, the reaction force is offset by the rotational inertial force of the rotor member 5 that accompanies opening / closing of the vehicle door DR. Since the holding force is reduced, a large reaction force is not felt during the opening / closing operation. Therefore, a door check device 1 ′ that generates a large holding force at an arbitrary opening / closing position and can smoothly open / close the vehicle door DR once the opening / closing operation of the vehicle door DR is started is configured. Can do.

(Modification)
In the said 2nd Embodiment, although the rotor member 5 which has the resin-made rotor bodies 51 and the some magnetic member 52 was shown, 5 A of rotor members shown in FIG. 11 are also employable. A rotor member 5A shown in FIG. 11 includes a cylindrical fixed portion 54 in which a hole for inserting the shaft portion 6b of the rotating shaft 6 is formed, and a pair extending radially outward from the outer periphery of the fixed portion 54. Wings 55, 55. Each of the wing portions 55, 55 is formed in a substantially fan shape as shown in FIG.

  The rotor member 5 </ b> A is disposed on the inner peripheral side of the ring magnet 4. As shown in FIG. 11, the ring magnet 4 is configured such that the magnetic poles alternately change at equal intervals along the circumferential direction, and two or more identical magnetic poles exist. In the example shown in FIG. 11, the ring magnet 4 is configured so that the same magnetic pole exists at two locations separated in the circumferential direction. Then, the pair of wing portions 55 and 55 of the rotor member 5 </ b> A are arranged to face each other on the inner peripheral surface of the ring magnet 4 that constitutes the same magnetic pole. The thus configured rotor member 5A is made of a magnetic material. The central angle of each of the wings 55, 55 formed in a fan shape is 45 °.

  FIG. 12 is a view showing a further modification of the rotor member 5A shown in FIG. The shape of the rotor member shown in FIG. 12 is basically the same as the shape of the rotor member shown in FIG. 11, and the only difference is the central angle of the wings. The central angle of the wings 55 and 55 of the rotor member 5B shown in FIG. 12 (a) is 30 °, and the central angle of the wings 55 and 55 of the rotor member 5C shown in FIG. 12 (b) is 60 °.

  FIG. 13 shows the rotation angle when the rotor members 5A, 5B, 5C make one rotation when the door check device 1 ′ according to the second embodiment is configured using the rotor members shown in FIGS. It is a graph which shows the relationship between (phi) and holding force. In FIG. 13, the solid line graph A shows the relationship between the rotation angle φ and the holding force when the rotor member 5A shown in FIG. 11 is used, and the alternate long and short dash line graph B shows the rotor member 5B shown in FIG. The relationship between the rotation angle φ and the holding force when used is shown, and the broken line graph C shows the relationship between the rotation angle φ and the holding force when the rotor member 5C shown in FIG. 12B is used. As shown in FIG. 13, even when the rotor members 5A, 5B, and 5C are used, as shown in the first embodiment, the reaction force is four times per one rotation (360 °) of the rotor member. Can produce a peak.

  When the rotor member 5A shown in FIG. 11 is used, the maximum reaction force generation position is the same as the maximum reaction force generation position when the rotor member 5 shown in the first embodiment is used (φ = 22.5 °). ). On the other hand, when the rotor member 5B shown in FIG. 12A is used, the maximum reaction force generation position is delayed as compared with the case where the rotor member 5A shown in FIG. 11 is used as shown in the graph B (φ = 30 °). . When the rotor member 5C shown in FIG. 12B is used, the maximum reaction force generation position is earlier than that in the case where the rotor member 5A shown in FIG. °). This is due to the fact that the rotation angle φ when the end face of the wing 55 reaches the boundary of the pole face of the ring magnet 4 varies depending on the difference in the center angle of the wing 55. Therefore, the maximum reaction force generation position can be adjusted by the central angle of the wing portion 55.

  Moreover, the graph D shown with a dashed-two dotted line in FIG. 13 is a graph which shows the relationship between rotation angle (phi) and holding force at the time of using the rotor member 5 which concerns on the said 1st Embodiment. The maximum holding force in the graph D is about twice the maximum holding force in the graphs A, B, and C. This is because the rotor members 5A, 5B, and 5C shown in FIGS. 11 and 12 are configured such that the pair of wing portions 55 and 55 face two locations on the inner peripheral surface of the ring magnet 4. This is because the rotor member 5 according to the first embodiment has four magnetic members 52 and is configured such that these magnetic members 52 face four locations on the inner peripheral surface of the ring magnet 4. That is, as shown in the first embodiment, when a plurality of magnetic members 52 are attached to the rotor body 51, the number of facing portions between the magnetic member 52 and the ring magnet 4 increases. The holding force represented by the sum of the reaction forces can be increased.

(Third embodiment)
Next, a third embodiment will be described. Similarly to the door check device 1 ′ shown in the second embodiment, the door check device 1 ″ according to the present embodiment includes a case member 2, a check rod 3, a ring magnet 4, a rotor member 5, and a rotating shaft 6. FIG. 14 is a plan view of the door check device 1 ″. As shown in FIG. 14, rack teeth 3 b are formed on the outer peripheral surface of the check bar 3 in the same manner as the check bar 3 described in the second embodiment. Since the configuration of the check bar 3 is the same as the configuration of the check bar 3 according to the second embodiment, a specific description thereof will be omitted. In the present embodiment, the check bar 3 does not pass through the case member 2.

  15 is an exploded perspective view of the case member 2 of the door check device 1 ″ and each component housed in the case member 2. FIG. 16A is a cross-sectional view taken along line AA of the case member 2 shown in FIG. Fig. 16B is a cross-sectional view taken along the line B-B of Fig. 16A, and Fig. 16C is a cross-sectional view taken along the line C-C of Fig. 16 A. As shown in Fig. 15 and Fig. 16A, the case member 2 includes the case main body 2a and the first cover 2e. And a second cover 2f.

  The case main body 2a is formed in a rectangular parallelepiped shape having a rectangular front surface S and a back surface R and four side surfaces, and a cylindrical space having a circular cross section and opening to the front surface S and the back surface R is formed inside. The first cover 2e is attached to the front surface S of the case body 2a so as to close the opening of the front surface S of the case body 2a, and the second cover 2f is attached to the back surface R of the case body 2a so as to close the opening of the back surface R of the case body 2a. Mounted on. Accordingly, the case main body 2a, the first cover 2e, and the second cover 2f constitute a case member 2 in which a cylindrical space is formed. The ring magnet 4, the rotor member 5, and the pair of bearings 9 and 9 are accommodated in the internal space of the case member 2 configured as described above.

  As shown in FIG. 16A, a protrusion 21 that protrudes toward the internal space of the case member 2 is formed at the center of the second cover 2f. The ring magnet 4 is fixed to the case member 2 by fitting the ring magnet 4 as a stator member into the protrusion 21. In the present embodiment, a disk-shaped magnet may be used instead of the ring magnet 4.

  FIG. 17 is a front view of the ring magnet 4. As shown in FIG. 17, the ring magnet 4 is configured such that the magnetic poles alternately change at 90 ° intervals along the circumferential direction. That is, four magnetic poles are formed along the circumferential direction of the ring magnet 4 and an angle (magnetic pole angle) M representing a region where the magnetic poles do not change is 90 °. Therefore, the outer peripheral surface of the ring magnet 4 is composed of four magnetic pole surfaces (two N pole surfaces and two S pole surfaces). The magnetic flux generated from the N pole surface of the outer peripheral surface 4 b of the ring magnet 4 enters the adjacent S pole surface through the space around the ring magnet 4.

  As shown in FIG. 15, the rotor member 5 includes a rotor cover 53, a magnetic body unit 7, and a pair of guide plates 8 and 8. The rotor cover 53 includes a cylindrical peripheral wall portion 531, a bottom wall portion 532 formed on one end surface of the peripheral wall portion 531, and a central portion of the bottom wall portion 532, and the inner periphery of the peripheral wall portion 531 from the bottom wall portion 532. And a boss portion 533 protruding toward the space side. In addition, as shown in FIG. 16B, four guide fixing portions 534 are formed on the inner wall surface of the peripheral wall portion 531 at equal intervals in the circumferential direction. Then, the rotor cover 53 is housed in the case member 2 so that the outer wall surface of the peripheral wall portion 531 faces the inner wall surface forming the cylindrical space of the case body 2a with a slight gap therebetween. At this time, as shown in FIG. 16A, the inside of the boss 533 is formed in a hollow shape so that the boss 533 of the rotor cover 53 does not interfere with the protrusion 21 provided on the second cover 2f. Therefore, the ring magnet 4 attached to the protrusion 21 faces the inner wall surface 533 a of the boss portion 533.

  As shown in FIG. 16A, the tip of the boss portion 533 of the rotor cover 53 is supported by the first cover 2e via the bearing 9, and the bottom wall portion 532 of the rotor cover 53 is supported by the second cover via the bearing 9. 2f is supported. Accordingly, the rotor cover 53 is held by the case member 2 so as to be rotatable around the central axis of the peripheral wall portion 531. Thus, the rotating shaft 6 is attached to the boss portion 533 of the rotor cover 53 held by the case member 2. A circular hole is formed in the center of the first cover 2e, and the rotating shaft 6 protrudes outside the case member 2 from the circular hole of the first cover 2e. A pinion gear is formed at a portion of the rotating shaft 6 protruding from the case member 2, and the pinion gear meshes with the rack teeth 3 b of the check rod 3. Therefore, when the check bar 3 moves in the axial direction, the rotation shaft 6 is rotated by the rack and pinion mechanism, and the rotor member 5 connected to the rotation shaft 6 is further rotated.

  The magnetic unit 7 is disposed in a ring-shaped space between the peripheral wall portion 531 and the boss portion 533 of the rotor cover 53. As shown in FIG. 15, the magnetic body unit 7 includes a first magnetic member 711, a second magnetic member 712, and a pair of springs 72 and 72. The first magnetic member 711 and the second magnetic member 712 have the same shape, and are substantially semicircular one end surface 71a and the other end surface 71b, and arcuate outer peripheral surface 71c and outer peripheral surface 71c that connect the edges of these end surfaces. It has a bottom surface 71d on the opposite side. A pair of leg portions 71e and 71e are erected apart from the bottom surface 71d. In addition, a groove 71f is formed on one end surface 71a of each of the first magnetic member 711 and the second magnetic member 712.

  As shown in FIG. 16B, a pair of leg portions 71e, 71e of the first magnetic member 711 and an arc-shaped inner peripheral surface 71g formed between the pair of leg portions 71e, 71e face the ring magnet 4. Similarly, a pair of leg portions 71e, 71e of the second magnetic member 712 and an arcuate inner peripheral surface 71g formed between the pair of leg portions 71e, 71e face the ring magnet 4. A pair of brackets 73 and 73 are fixed to the first magnetic member 711 and the second magnetic member 712, respectively. One end of a pair of springs 72, 72 is locked to the tip of the pair of brackets 73, 73 fixed to the first magnetic member 711, and the tip of the pair of brackets 73, 73 fixed to the second magnetic member 712 The other ends of the pair of springs 72, 72 are locked to the portion. The first magnetic member 711 and the second magnetic member 712 are connected by the pair of springs 72 and 72 so that the tips of the leg portions 71e and 71e of the first magnetic member 711 and the second magnetic member 712 face each other.

  The magnetic body unit 7 is disposed in the rotor cover 53 so that the first magnetic member 711 and the second magnetic member 712 are opposed to each other with the boss portion 533 of the rotor cover 53 and the ring magnet 4 interposed therebetween. Further, the springs 72, 72 always generate contraction force. Accordingly, the first magnetic member 711 and the second magnetic member 712 are biased in the direction approaching the ring magnet 4 by the elastic force of the springs 72 and 72, respectively. Both the first magnetic member 711 and the second magnetic member 712 are made of a magnetic material (for example, iron).

  As shown in FIG. 15, the pair of guide plates 8 and 8 are formed in an elongated flat plate shape. A protrusion 8 a is formed at the center of one surface of the guide plate 8. Then, the protrusion 8a of one guide plate 8 is fitted into a groove 71f formed on one end surface 71a of the first magnetic member 711, and the protrusion 8a of the other guide plate 8 is formed on the one end surface 71a of the second magnetic member 712. The pair of guide plates 8 and 8 are fixed to the guide fixing portion 534 so as to be fitted into the formed groove 71f. When the pair of guide plates 8 and 8 are fixed to the guide fixing portion 534, they are arranged in parallel to each other as shown in FIG. 16C. By fitting the protrusion 8a of the guide plate 8 into the groove 71f, the first magnetic member 711 and the second magnetic member 712 can move in the extending direction of the groove 71f with respect to the rotor cover 53, and the other directions The movement is guided by the guide plate 8 so that the movement is impossible. Here, the groove 71f is formed along the radial direction in the rotation plane of the rotor member 5 (the radial direction of the peripheral wall portion 531 of the rotor cover 53) in the assembled state shown in FIG. 16B. Therefore, the first magnetic member 711 and the second magnetic member 712 are assembled to the case member 2 so as to be movable in the radial direction of the rotor member 5 and not movable in the other directions.

  The operation of the door check device 1 having the above configuration will be described below. When the vehicle door DR opens and closes, the check bar 3 moves relative to the case member 2 in the axial direction. When the check bar 3 moves in the axial direction, the rotary shaft 6 having a pinion gear meshing with the rack teeth 3b of the check bar 3 rotates, and the rotor cover 53 connected to the rotary shaft 6 rotates. As the rotor cover 53 rotates, the guide plate 8 fixed to the guide fixing portion 534 of the rotor cover 53 also rotates. Since the protrusion 8 a of the guide plate 8 is fitted in the groove 71 f of the first magnetic member 711 and the second magnetic member 712, the magnetic body unit 7 rotates as the guide plate 8 rotates. As described above, as the check rod 3 moves in the axial direction, the rotating shaft 6 and the rotor member 5 rotate integrally.

  As the rotor member 5 rotates, the first magnetic member 711 and the second magnetic member 712 rotate around the ring magnet 4. At this time, the first magnetic member 711 and the second magnetic member 712 rotate with respect to the ring magnet 4 so as to cross the magnetic flux of the ring magnet 4. In this embodiment, the diameter of the pinion gear of the rotating shaft 6 is adjusted so that the rotor member 5 rotates several to several dozen per series of opening / closing operations of the vehicle door DR.

  The first magnetic member 711 and the second magnetic member 712 (hereinafter, the first magnetic member 711 and the second magnetic member 712 are collectively referred to as the magnetic member 71) while the rotor member 5 rotates once. The facing position with the ring magnet 4 and the magnetic pole of the ring magnet 4 at the facing position change alternately. FIG. 18 is a diagram illustrating a change in the facing state between the ring magnet 4 and the magnetic member 71. The facing state of the ring magnet 4 and the magnetic member 71 changes in the order of FIG. 18 (a) → FIG. 18 (b) → FIG. 18 (c) → FIG. 18 (d) → FIG.

  When the facing state of the ring magnet 4 and the magnetic member 71 is the state shown in FIG. 18A, the central portion in the circumferential direction of the inner peripheral surface 71g of the magnetic member 71 is the N pole surface and the S pole surface of the ring magnet 4 Facing the boundary position. In the state shown in FIG. 18A, the arrangement state of the magnetic member 71 with respect to the magnetic flux is most stable. At this time, the amount of magnetic flux passing through the magnetic member 71 is the largest. That is, the magnetic flux is most likely to pass through the magnetic member 71. Such a rotational position of the magnetic member 71 is referred to as a “stable position”. Further, the rotation angle φ of the rotor member 5 when the magnetic member 71 is at the rotational position as shown in FIG.

  When the rotor member 5 rotates in one direction as the check bar 3 moves in the axial direction from when the rotation position of the magnetic member 71 is at the stable position, the leg portion 71e and the inner peripheral surface 71g of the magnetic member 71, and the ring The facing position with the magnet 4 changes and the magnetic member 71 rotates so as to cross the magnetic flux of the ring magnet 4, so that the amount of magnetic flux passing through the magnetic member 71 changes. At this time, a reaction force against the rotation operation of the magnetic member 71, that is, a reaction force for returning the rotation position of the magnetic member 71 to the stable position acts on the magnetic member 71. Thereby, a resistance force against the rotation of the rotor member 5 acts on the rotor member 5. Such a reaction force acts as a holding force for the vehicle door DR. The magnitude of the reaction force is proportional to the amount of change (decrease) in the amount of magnetic flux passing through the magnetic member 71. The amount of change (decrease) in the amount of magnetic flux passing through the magnetic member 71 increases as the rotational position of the magnetic member 71 moves away from the stable position shown in FIG. Therefore, the reaction force increases as the rotational position of the magnetic member 71 moves away from the rotational position shown in FIG. Then, when the rotation angle φ of the rotor member 5 is 22.5 °, the magnitude of the reaction force reaches a peak. FIG. 18B shows the facing state of the ring magnet 4 and the magnetic member 71 when the rotation angle φ is 22.5 °. The rotational position of the magnetic member 71 when the magnitude of the reaction force is at a peak is referred to as a “maximum reaction force generation position” in this specification.

  When the rotation position of the magnetic member 71 is the maximum reaction force generation position and the rotor member 5 further rotates in one direction, the facing position of the leg portion 71e and the inner peripheral surface 71g of the magnetic member 71 and the ring magnet 4 And the magnetic member 71 rotates so as to cross the magnetic flux of the ring magnet 4, so that the amount of magnetic flux passing through the magnetic member 71 changes. However, since the amount of change (decrease amount) in the amount of magnetic flux decreases, the magnitude of the reaction force decreases. When the rotation angle φ of the rotor member 5 is 45 °, the magnitude of the reaction force becomes zero. FIG. 18C shows the facing state of the ring magnet 4 and the magnetic member 71 when the rotation angle φ is 45 °. Such a rotational position of the magnetic member 71 with respect to the ring magnet 4 is referred to as a “neutral position” in this specification. When in the neutral position, the magnetic flux of the ring magnet 4 hardly passes through the magnetic member 71.

  When the rotor member 5 further rotates in one direction from when the rotation position of the magnetic member 71 is in the neutral position, the facing positions of the leg portions 71e and the inner peripheral surface 71g of the magnetic member 71 and the ring magnet 4 change. Since the magnetic member 71 rotates so as to cross the magnetic flux of the ring magnet 4, the amount of magnetic flux passing through the magnetic member 71 changes. At this time, the rotor member 5 receives a force from the ring magnet 4 to pull the magnetic member 71 closer to a stable position. That is, when the rotor member 5 tries to rotate after the magnetic member 71 is in the neutral position, the rotor member 5 receives a propulsive force for the rotation from the ring magnet 4. The magnitude of the propulsive force is proportional to the amount of change (increase) in the amount of magnetic flux passing through the magnetic member 71. The amount of change (increase) in the amount of magnetic flux passing through the magnetic member 71 increases as the rotational position of the magnetic member 71 moves away from the neutral position. Therefore, the propulsive force increases as the rotational position of the magnetic member 71 moves away from the rotational position shown in FIG. 18C, and reaches a peak when the rotational angle φ of the rotor member 5 is 67.5 °. The rotational position of the magnetic member 71 when the magnitude of the propulsive force is at a peak is referred to as “maximum propulsive force generation position” in this specification. FIG. 18D shows the facing state of the ring magnet 4 and the magnetic member 71 when the rotation angle φ is 67.5 °.

  When the rotor member 5 is further rotated in one direction by receiving the propulsive force of the ring magnet 4 from when the rotational position of the magnetic member 71 is the maximum propulsive force generating position, the leg portion 71e and the inner peripheral surface 71g of the magnetic member 71 are rotated. As the facing position with the ring magnet 4 changes, the magnetic member 71 rotates so as to cross the magnetic flux of the ring magnet 4, so that the amount of magnetic flux passing through the magnetic member 71 changes. However, since the amount of change (increase) in the amount of magnetic flux decreases, the propulsive force also decreases. When the rotation angle φ of the rotor member 5 reaches 90 °, the propulsive force becomes 0 and the rotation position of the magnetic member 71 reaches the stable position again. FIG. 18E shows the facing state of the ring magnet 4 and the magnetic member 71 when the rotation angle φ is 90 °. The facing state between the magnetic member 71 and the ring magnet 4 shown in FIG. 18 (e) is the same as the facing state shown in FIG. 18 (a).

  Therefore, also in the door check device 1 ″ according to the present embodiment, like the door check device 1 according to the first embodiment, every time the rotor member 5 rotates 90 °, the reaction force reaches a peak and a large holding force is obtained. In other words, four reaction force peaks occur during one rotation of the rotor member 5. Also, the rack and pinion mechanism (meshing of the rack teeth 3b of the check rod 3 and the pinion gear of the rotating shaft 6). Thus, the axial movement operation of the check rod 3 is converted into the rotation operation of the rotor member 5. Then, the pinion is rotated so that the rotor member 5 rotates several to several tens of times per one opening / closing operation of the vehicle door DR. The gear diameter (the number of teeth) is adjusted, so that a large number of reaction force peaks, that is, a large holding force is generated per one opening / closing operation of the vehicle door DR. It is possible to increase the number of occurrences of peaks of retention in per one of the opening and closing operation, as a result, pseudo can generate a large holding force at any open position.

  In the present embodiment, when the rotor member 5 rotates, a centrifugal force due to the rotation acts on the magnetic member 71. When the centrifugal force acting on the magnetic member 71 becomes larger than the elastic force (contraction force) of the spring 72, the magnetic member 71 moves radially outward in the rotation plane of the rotor member 5 by the centrifugal force. FIG. 19 is a diagram illustrating a state in which the magnetic member 71 has moved radially outward in the plane of rotation of the rotor member 5. When the magnetic member 71 moves as shown in FIG. 19, the distance between the magnetic member 71 and the ring magnet 4 increases. For this reason, the influence of the magnetic flux of the ring magnet 4 on the magnetic member 71 is reduced, and the force that the magnetic member 71 receives from the ring magnet 4 is reduced. For this reason, the reaction force acting on the magnetic member 71 is reduced. That is, the vehicle door DR is opened / closed at a certain opening / closing speed to rotate the rotor member 5 at a high speed, and the magnetic member 71 is moved away from the ring magnet 4 by centrifugal force. The holding force can be further reduced. For this reason, the door check device 1 that generates a large holding force at an arbitrary opening / closing position and that can open / close the vehicle door DR more smoothly once the opening / closing operation of the vehicle door DR is started is configured. be able to.

  As described above, the door check device according to the present embodiment is connected to the vehicle body B with the case member 2 attached to the vehicle door DR connected to the vehicle body B so that the opening OP formed in the vehicle body B can be opened and closed. And a check rod 3 that moves relative to the case member 2 in the axial direction in accordance with the opening / closing operation of the vehicle door DR, a ring magnet 4 fixed in the case member 2, and a rotatable arrangement in the case member 2. And a rotor member 5 coupled to the check bar 3 so as to rotate as the check bar 3 moves in the axial direction. The rotor member 5 includes a magnetic member 52. And the ring magnet 4 and the rotor member 5 are arrange | positioned in the case member 2 so that the magnetic member 52 may cross the magnetic flux of the ring magnet 4 when the rotor member 5 rotates.

  According to the present embodiment, the rotor member 5 and the ring magnet 4 are disposed in the case member so that the magnetic member 52 crosses the magnetic flux of the ring magnet 4 when the rotor member 5 rotates, and any opening can be achieved. It is possible to provide a door check device capable of generating a large holding force at the degree position. Moreover, since the door check apparatus according to the present embodiment does not require a special seal structure, the structure can be further simplified. Further, since two magnets are not required to generate the holding force, the cost required for the magnets can be reduced. By these, the manufacturing cost of a door check apparatus can be reduced significantly. In addition, since the door check device according to the present embodiment is configured to generate a holding force while maintaining the non-contact state between the ring magnet 4 and the rotor member 5 by magnetic force, abnormal noise such as operation noise is generated. It does not occur, the components do not deteriorate due to wear, and the holding force does not fluctuate due to temperature, humidity, wetting, or the like. Therefore, a door check device with improved durability can be provided.

  The present invention should not be limited to the above embodiment. For example, in the above-described embodiment, the configuration in which the stator member includes the ring magnet and the rotor member includes the magnetic body has been described. However, the stator member may include the magnetic body and the rotor member may include the magnet. In this case, it is preferable that the magnetic body provided on the stator member is alternately configured so that the state facing the magnet and the state not facing the magnet are alternately repeated. In the above embodiment, the screw / nut mechanism and the rack and pinion mechanism are shown as the conversion mechanism for changing the axial movement operation of the check rod 3 to the rotation operation of the rotor member 5, but other conversion mechanisms are adopted. Also good. Moreover, although the said embodiment demonstrated the door check apparatus provided between a vehicle body and a vehicle door, this invention is a structure which can open and close the structure (for example, house) which has an opening, and the opening of the structure It is applicable also to the door check apparatus provided between the doors attached to the. Thus, the present invention can be modified without departing from the gist thereof.

DESCRIPTION OF SYMBOLS 1 ... Door check apparatus, 2 ... Case member, 21 ... Projection part, 3 ... Check rod, 3a ... Male screw, 3b ... Rack tooth, 4 ... Ring magnet (stator member), 4a ... Inner peripheral surface, 4b ... Outer peripheral surface 5, 5A, 5B, 5C ... rotor member, 51 ... rotor body, 51b ... outer peripheral surface, 52 ... magnetic member (magnetic body), 521 ... magnetic pole facing surface, 53 ... rotor cover, 54 ... fixing part, 55 ... wings Part (magnetic body), 6 ... rotating shaft, 6a ... pinion gear part, 6b ... shaft part, 7 ... magnetic body unit, 71 ... magnetic member (magnetic body), 711 ... first magnetic member (first magnetic body), 712 ... 2nd magnetic member (2nd magnetic body), 71a ... One end surface, 71b ... The other end surface, 71c ... Outer peripheral surface, 71d ... Bottom surface, 71e ... Leg part, 71f ... Groove, 71g ... Inner peripheral surface, 72 ... Spring 8 ... Guide plate, 8a ... Projection, J ... Mounting angle, M Pole angle, theta ... magnetic disposed angle, phi ... rotation angle

Claims (4)

A case member attached to a door connected to the structure so as to be able to open and close an opening formed in the structure;
A check rod connected to the structure and moving relative to the case member in the axial direction in accordance with the opening and closing operation of the door;
A stator member fixed in the case member;
A rotor member rotatably disposed in the case member and coupled to the check rod so as to rotate with the axial movement of the check rod;
With
The stator member includes a magnet, and the rotor member includes a magnetic body;
The stator member and the rotor member are disposed in the case member so that the magnetic body crosses the magnetic flux of the magnet when the rotor member rotates .
The magnet is a door check device disposed facing the magnetic body so that the position facing the magnetic body changes as the rotor member rotates and the magnetic poles at the facing position change alternately. ,
The stator member has a ring magnet that is formed in a ring shape and is configured so that the magnetic poles are alternately changed at equal intervals along the circumferential direction.
The rotor member has a cylindrical rotor body that is disposed on the inner peripheral side of the ring magnet, has an outer peripheral surface facing the inner peripheral surface of the ring magnet, and is formed of a nonmagnetic material.
A door check device in which the magnetic body is attached to an outer peripheral surface of the rotor body . The door check device according to claim 1,
A plurality of the magnetic bodies are attached to the rotor body at regular intervals along the circumferential direction of the rotor body,
A door check device in which a plurality of attachment angles of the magnetic bodies coincide with a magnetic pole angle representing a region in which the magnetic pole does not change along the circumferential direction of the ring magnet. A case member attached to a door connected to the structure so as to be able to open and close an opening formed in the structure;
A check rod connected to the structure and moving relative to the case member in the axial direction in accordance with the opening and closing operation of the door;
A stator member fixed in the case member;
A rotor member rotatably disposed in the case member and coupled to the check rod so as to rotate with the axial movement of the check rod;
With
The stator member includes a magnet, and the rotor member includes a magnetic body;
Before SL as the magnetic flux of the magnet when the rotor member rotates the magnetic body traverses the stator member and the rotor member is disposed inside the case member,
The magnet is a door check device arranged facing the magnetic body so that the position facing the magnetic body changes as the rotor member rotates and the magnetic poles at the facing position change alternately. ,
The stator member is formed in a ring shape, and has a ring magnet configured such that the magnetic poles are alternately changed at equal intervals along the circumferential direction, and two or more identical magnetic poles exist.
The magnetic body has a plurality of wings that are arranged on the inner peripheral side of the ring magnet and faced to a part of the inner peripheral surface of the ring magnet that constitutes the same magnetic pole.
Door check device. A case member attached to a door connected to the structure so as to be able to open and close an opening formed in the structure;
A check rod connected to the structure and moving relative to the case member in the axial direction in accordance with the opening and closing operation of the door;
A stator member fixed in the case member;
A rotor member rotatably disposed in the case member and coupled to the check rod so as to rotate with the axial movement of the check rod;
With
The stator member includes a magnet, and the rotor member includes a magnetic body;
The stator member and the rotor member are disposed in the case member so that the magnetic body crosses the magnetic flux of the magnet when the rotor member rotates.
The magnet is a door check device disposed facing the magnetic body so that the position facing the magnetic body changes as the rotor member rotates and the magnetic poles at the facing position change alternately. ,
The stator member has a ring-shaped magnet formed in a ring shape or a disk shape in which the magnetic poles alternately change at equal intervals along the circumferential direction,
The rotor member is disposed to face a part of the outer peripheral surface of the ring magnet and the first magnetic body is disposed to face a part of the outer peripheral surface of the ring magnet, and the ring magnet is sandwiched between the rotor member. A second magnetic body disposed opposite to the first magnetic body, and connected to the first magnetic body and the second magnetic body, and both the first magnetic body and the second magnetic body approach the ring magnet. A magnetic unit having a biasing member biasing in the direction,
The magnetic body unit is rotatable about the ring-shaped magnet, and is configured so that the first magnetic body and the second magnetic body are moved away from the ring-shaped magnet by a rotational centrifugal force. The door check device.

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