JP6361369B2 - Vehicle seat and actuator - Google Patents

Description

  The present invention relates to a vehicle seat and an actuator.

  Patent Document 1 below discloses an actuator (drive unit) for automatically opening and closing a slide door provided on a side portion of a vehicle. In the actuator described in this document, noise generated at the sliding contact portion between the brush and the commutator is radiated to the outside of the actuator via the yoke by electrically connecting the yoke and the vehicle body via the ground plate. Is suppressed.

JP 2011-78279 A

  However, in the configuration described in Patent Document 1, it is necessary to attach a ground plate for connecting the yoke and the vehicle body in addition to fixing the actuator to the door reinforcement or the like. That is, when the noise suppression structure as described above is employed, it is conceivable that the operation of attaching the actuator to a vehicle component or the like becomes complicated.

  An object of the present invention is to obtain an actuator that can reduce electromagnetic noise and can be easily attached to a vehicle component or the like, and a vehicle seat including the actuator, in consideration of the above facts.

The vehicle seat according to claim 1 is a skeletal member formed using a conductive material while forming a skeleton of a seat cushion that supports the occupant's buttocks and thighs or a seat back that supports the back of the occupant. A motor main body having a yoke having a cylindrical portion formed in a cylindrical shape , a housing supporting the motor main body, and formed of a conductive material and electrically connected to the yoke; An actuator having a ground spring portion that contacts the skeleton member in a state of being elastically deformed when the housing is fixed to the skeleton member, and the ground spring portion is fixed to the housing. And an extension portion extending from the fixing portion toward the radially outer side of the cylindrical portion, and the front of the extension portion when the housing is fixed to the skeleton member. Fixing portion is elastically deformed, the opposite side sliding contact with the frame member and the stationary portion in the extending portion.

  According to the vehicle seat of the first aspect, the actuator is attached to the skeleton member forming the skeleton of the seat cushion or the seat back. The actuator can be adjusted by transmitting the operating force of the actuator to a member attached to the seat cushion or the seat back, or the seat cushion and the seat back can be adjusted by the operating force of the actuator. It is possible to do. Here, in the present invention, when the housing of the actuator is fixed to the skeleton member, the grounding spring portion abuts on the skeleton member and elastically deforms. In addition, in a state where the housing is fixed to the skeleton member, the surface pressure of the contact portion between the ground spring portion and the skeleton member increases due to the elastic force of the ground spring portion, and the ground spring portion and the skeleton member are in a stable state. Contact. In the present invention, the yoke can be grounded to the skeleton member via the ground spring portion at the same time as the housing is fixed to the skeleton member. That is, according to the present invention, it is possible to reduce electromagnetic noise radiated from the yoke when the motor body rotates, and to easily attach the actuator to the skeleton member.

  A vehicle seat according to a second aspect is the vehicle seat according to the first aspect, wherein the grounding spring portion and the yoke are fixed to the housing by the same fastening member.

  According to the vehicle seat of the second aspect, the number of fastening members used for the actuator can be reduced.

The vehicular seat according to claim 3 is the vehicular seat according to claim 1 or 2, wherein the grounding spring portion draws an arc-shaped trajectory on the opposite side of the extending portion from the fixed portion. the fixing portion side in the extending portion is configured to be elastically deformed.

According to the vehicle seat of the third aspect, the grounding spring portion and the skeleton member can be brought into contact with each other.

The actuator according to claim 4 is formed using a motor main body having a yoke having a cylindrical portion formed in a cylindrical shape , a housing supporting the motor main body, and a conductive material, and the yoke. And a ground spring portion that abuts the fixed portion in an elastically deformed state when the housing is fixed to a conductive fixed portion, and the ground spring portion includes the housing A fixing portion that is fixed to the fixing portion, and an extension portion that extends from the fixing portion toward a radially outer side of the cylindrical portion, and the extension portion when the housing is fixed to the fixed portion The fixed portion side of the elastic member is elastically deformed, and the opposite side of the extending portion to the fixed portion is in sliding contact with the fixed portion .

  According to the actuator of the fourth aspect, when the housing of the actuator is fixed to the fixed portion, the ground spring portion comes into contact with the fixed portion and is elastically deformed. In addition, when the housing is fixed to the fixed part, the surface pressure of the contact part between the ground spring part and the fixed part increases due to the elastic force of the ground spring part, and the ground spring part and the fixed part are stable. Contact in the state. Further, in the present invention, the yoke can be grounded to the fixed portion via the ground spring portion at the same time as the housing is fixed to the fixed portion. That is, according to the present invention, it is possible to reduce electromagnetic noise radiated from the yoke when the motor body rotates, and to easily attach the actuator to the fixed portion.

It is a top view which shows the motor for vehicles. It is a front view which shows the motor for vehicles. It is a top view which shows the motor for vehicles of the state fixed to the side frame. It is a front view which shows the motor for vehicles of the state fixed to the side frame. It is the side view which looked at the vehicle seat from the seat measurement side.

  An actuator according to an embodiment of the present invention and a vehicle seat provided with the actuator will be described with reference to FIGS.

  As shown in FIG. 5, the actuator of this embodiment is a vehicle motor 14 that moves up and down the front end portion of the seat cushion 12 of the vehicle seat 10. Hereinafter, first, a schematic configuration of the vehicle seat 10 will be described, and then the vehicle motor 14 will be described.

(Schematic configuration of the vehicle seat 10)
The vehicle seat 10 includes a seat cushion 12 that supports the occupant's buttocks and thighs, and a seat back 16 that supports the occupant's back and is tiltably attached to the rear end of the seat cushion 12. Configured.

  The seat cushion 12 includes a pair of metal side frames 18 that constitute a part of the skeleton member of the seat cushion 12. The pair of side frames 18 are formed by subjecting a steel plate material to press working or the like, and are arranged at intervals in the vehicle width direction. Further, the side frame 18 is provided with a fixed portion 18A to which a vehicle motor 14 described in detail later is fixed. The side frame 18 is electrically connected to the vehicle body via a seat slide rail (not shown).

  The front end portions of the pair of side frames 18 are connected by a cylindrical front frame 24 extending in the seat width direction, and the front frame 24 is rotatable with respect to the side frame 18. Further, a pair of arms 26 extending toward the front side of the seat and a selector gear 28 that meshes with an output gear 36 of the vehicle motor 14 described in detail later are joined to the front frame 24. When the vehicle motor 14 is operated and the selector gear 28 rotates the front frame 24, the pair of arms 26 are tilted in the vertical direction of the seat. Thereby, the front end part of the seat cushion 12 can be moved up and down. The side frame 18 and the tilt mechanism (front frame 24, arm 26 and selector gear 28) described above are covered with the seat cushion pad 30 and the skin material.

(Configuration of motor 14 for vehicle)
As shown in FIGS. 1 and 2, the vehicle motor 14 includes a housing 32 that forms an outline of the vehicle motor 14, and a motor body 34 that is disposed in the housing 32 and supported by the housing 32. And an output gear 36 to which the power of the motor body 34 is transmitted.

  The motor main body 34 includes a yoke 38 formed in a bottomed cylindrical shape using a steel plate material or the like that is a conductive material. The yoke 38 includes a cylindrical portion 38A formed in a cylindrical shape, a bottom wall portion 38B that closes one end of the cylindrical portion 38A, and a radially outer side of the cylindrical portion 38A from the other end of the cylindrical portion 38A. And a flange portion 38C extending in the direction. A segment magnet (not shown) is fixed to the inner peripheral surface of the cylindrical portion 38A. The yoke 38 and the segment magnet constitute a stator of the motor body 34. Further, inside the cylindrical portion 38A, a rotor configured to include a rotating shaft, an iron core fixed to the rotating shaft, and a winding wound around the iron core is provided.

  The housing 32 is formed in a rectangular box shape using a resin material that is an insulator, and the housing 32 is provided with a connector portion 32 </ b> A including a terminal 40 for supplying power to the motor body 34.

  Next, the grounding spring part 42 which is a main part of the present embodiment will be described.

  The ground spring portion 42 is formed using a steel plate material or the like that is a conductive material. The ground spring portion 42 includes a fixed portion 44 that extends along the flange portion 38 </ b> C of the yoke 38, and one end of the fixed portion 44. And an extending portion 46 extending outward in the radial direction of the cylindrical portion 38 </ b> A of the yoke 38.

  The fixing portion 44 is fixed to the housing 32 via a bolt 48 as a fastening member together with the flange portion 38 </ b> C of the yoke 38.

  The extension 46 is a first extension extending in an inclined manner with respect to the outer peripheral surface of the cylindrical portion 38A in a plan view and before the housing 32 is fixed to the fixed portion 18A of the side frame 18. Part 50 and a second extending part 52 extending from the tip of the first extending part 50 in parallel with the outer peripheral surface of the cylindrical part 38 </ b> A. Further, a bent portion 54 is formed at the boundary between the first extension portion 50 and the second extension portion 52. Further, the distal end portion 56 of the extending portion 46 draws an arcuate locus in plan view (moves in the direction of arrow G) when the proximal end side of the extending portion 46 is elastically deformed. That is, the distal end side of the first extending portion 50 and the second extending portion 52 are configured to draw an arcuate locus in plan view as the proximal end side of the first extending portion 50 is elastically deformed.

  As shown in FIG. 5, the housing 32 of the vehicle motor 14 described above is fixed to the fixed portion 18A of the side frame 18 via a bolt (not shown). Thereby, the vehicle motor 14 is fixed to the side frame 18. Further, by fixing the housing 32 to the fixed portion 18A of the side frame 18, the distal end portion 56 of the ground spring portion 42 contacts the fixed portion 18A of the side frame 18, and the base end side of the ground spring portion 42 is elastic. Deform. Further, in this embodiment, when the housing 32 is fixed to the fixed portion 18A of the side frame 18, the side frame 18 is fixed while the front end portion 56 of the ground spring portion 42 moves so as to draw an arcuate locus. It comes in sliding contact with the portion 18A. Further, in the present embodiment, when the housing 32 is fixed to the fixed portion 18A of the side frame 18, the bent portion 54 formed at the boundary between the first extension portion 50 and the second extension portion 52 is the side. The frame 18 is in contact with the fixed portion 18A.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  As shown in FIG. 5, when electric power is supplied to the vehicle motor 14 and the output gear 36 rotates to one side (arrow A direction), the front frame 24 rotates to the other side (arrow D direction), and the arm 26 Tilts upward in the sheet (arrow E direction). As a result, the front end of the seat cushion 12 rises to the upper side of the seat. When the output gear 36 rotates to the other side (arrow B direction), the front frame 24 rotates to one side (arrow C direction), and the arm 26 tilts downward in the seat (arrow F direction). As a result, the front end of the seat cushion 12 is lowered to the seat lower side.

  As shown in FIGS. 2 to 4, according to the vehicle seat 10 of the present embodiment, the housing 32 of the vehicle motor 14 is fixed to the fixed portion 18 </ b> A of the side frame 18. The portion 42 contacts the fixed portion 18A of the side frame 18 and is elastically deformed. When the housing 32 is fixed to the fixed portion 18A of the side frame 18, the surface pressure of the contact portion between the ground spring portion 42 and the fixed portion 18A of the side frame 18 is caused by the elastic force of the ground spring portion 42. The ground spring portion 42 and the fixed portion 18A of the side frame 18 come into contact with each other in a stable state. Further, in the present embodiment, the yoke 38 can be grounded to the side frame 18 via the ground spring portion 42 at the same time that the housing 32 is fixed to the fixed portion 18A of the side frame 18. Thereby, in this embodiment, while the electromagnetic noise radiated | emitted from the yoke 38 when the motor main body 34 rotates, attachment to the side frame 18 of the motor 14 for vehicles can be performed easily. .

  In the present embodiment, the fixing portion 44 of the grounding spring portion 42 and the flange portion 38C of the yoke 38 are fixed to the housing 32 via the same bolt 48, so that the bolt 48 used for the vehicle motor 14 is used. The number of can be reduced.

  Furthermore, in this embodiment, when the housing 32 is fixed to the fixed portion 18A of the side frame 18, the side frame 18 is fixed while the tip portion 56 of the grounding spring portion 42 moves so as to draw an arcuate locus. By adopting a structure in sliding contact with the portion 18A, the tip end portion 56 of the grounding spring portion 42 and the fixed portion 18A of the housing 32 can be brought into contact with each other.

  In the present embodiment, the example in which the distal end portion 56 of the ground spring portion 42 is configured to slide in contact with the fixed portion 18A of the side frame 18 while moving so as to draw an arcuate locus has been described. Is not limited to this. Whether or not the front end portion 56 of the ground spring portion 42 and the fixed portion 18A of the side frame 18 are brought into sliding contact with each other may be appropriately set in consideration of the surface state of both.

  In this embodiment, the example in which the fixing portion 44 of the ground spring portion 42 and the flange portion 38C of the yoke 38 are fixed to the housing 32 via the same bolt 48 has been described, but the present invention is not limited to this. For example, the fixing portion 44 of the ground spring portion 42 may be joined to the flange portion 38C of the yoke 38 by welding.

  Furthermore, although this embodiment demonstrated the example which fixed the motor 14 for vehicles to the side frame 18 which comprises some frame members of the seat cushion 12, this invention is not limited to this. For example, the vehicle motor 14 can be fixed to the skeleton member of the seat back 16 and the seat back 16 can be reclined by the driving force of the vehicle motor 14. Moreover, the other member which comprises a vehicle can also be adjusted using the actuator comprised similarly to the motor 14 for this vehicle.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be implemented without departing from the spirit of the present invention. Of course.

DESCRIPTION OF SYMBOLS 10 ... Vehicle seat, 12 ... Seat cushion, 14 ... Vehicle motor (actuator), 16 ... Seat back, 18 ... Side frame (frame member), 18A ... Fixed part, 32 ... Housing, 34 ... Motor body, 38 ... Yoke, 42 ... Ground spring part, 48 ... Bolt (fastening member), 56 ... Tip part (tip part of ground spring part)

Claims (4)

A skeletal member formed using a conductive material while forming a skeleton of a seat cushion that supports the buttocks and thighs of the occupant or a seat back that supports the back of the occupant;
A motor main body having a yoke having a cylindrical portion formed in a cylindrical shape , a housing for supporting the motor main body, formed using a conductive material and electrically connected to the yoke; An actuator having a grounding spring portion that comes into contact with the skeleton member in an elastically deformed state by fixing a housing to the skeleton member;
Equipped with a,
The ground spring portion includes a fixed portion fixed to the housing, and an extending portion extending from the fixed portion toward the radially outer side of the cylindrical portion,
A vehicle seat in which, when the housing is fixed to the skeleton member, the fixing portion side of the extension portion is elastically deformed, and the opposite side of the extension portion to the fixing portion is in sliding contact with the skeleton member .   The vehicle seat according to claim 1, wherein the grounding spring portion and the yoke are fixed to the housing by the same fastening member. The ground spring portion is opposite to claim 1 or claim wherein the fixed portion side in the extending portion so as to draw an arcuate path is configured to be elastically deformed and the fixing portion in the extending portion The vehicle seat according to 2. A motor body having a yoke with a cylindrical portion formed in a cylindrical shape ;
A housing for supporting the motor body;
A grounding spring that is formed using a conductive material and is electrically connected to the yoke, and abuts the housing in an elastically deformed state by being fixed to the conductive fixed portion. And
Equipped with a,
The ground spring portion includes a fixed portion fixed to the housing, and an extending portion extending from the fixed portion toward the radially outer side of the cylindrical portion,
An actuator in which when the housing is fixed to the fixed portion, the fixed portion side of the extended portion is elastically deformed, and the opposite side of the extended portion to the fixed portion is in sliding contact with the fixed portion .