JP2022144112A - Vehicular seat - Google Patents

Abstract

To provide a vehicular seat capable of attaching a sound insulation cover to a motor supported by a frame by simple assembling work.SOLUTION: A vehicular seat is equipped with a frame 32, a motor 55 supported by the frame 32, and a sound insulation cover 56 attached to the motor 55. The sound insulation cover 56 has a first half body 56a that partially covers the motor 55, a second half body 56b that is coupled to the first half body 56a by a ribbing hinge 63, and is displaced by the working of the ribbing hinge 63 between an opening position separating from the first half body 56a and a uniting position storing the motor 55 between the second half body 56b and the first half body 56a, and an engaging piece 64 that is integrally formed with the second half body 56b and engages with the first half body 56a according to elastic force to hold the second half body 56b at the uniting position.SELECTED DRAWING: Figure 4

Description

The present invention relates to a vehicle seat including a frame and a motor supported by the frame.

Patent Document 1 discloses a power seat motor unit that adjusts the height of a vehicle seat. The power seat motor unit includes a gearbox fixed to the frame of the vehicle seat and a motor coupled to the gearbox. A driving force of the motor is transmitted to the link member from a gear assembly housed in the gearbox. The link member guides the vertical movement of the seat cushion frame with respect to the base frame around the horizontal axis.

JP 2017-181968 A

In Patent Document 1, the gearbox is covered with a soundproof cover at the position of the first gear. Low frequency noise can be reduced according to the action of the mass embedded in the soundproof cover. However, although the acoustic cover covers the outer surface of the gearbox, it does not cover the motor. Moreover, the soundproof cover only partially covers the gearbox. The soundproof cover opens toward the metal plate that supports the gearbox.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle seat in which a soundproof cover can be attached to a motor supported by a frame by simple assembly work.

A first aspect of the present invention comprises a frame, a motor supported by the frame, and a soundproof cover attached to the motor, wherein the soundproof cover partially covers the motor. and an open position hinged to the first half such that the hinge moves away from the first half, and a coupled position accommodating the motor between the first half. and an engaging piece formed integrally with the second half body to engage with the first half body according to elastic force to hold the second half body at the coupling position. and a vehicle seat.

According to the second aspect, in addition to the configuration of the first aspect, the soundproof cover is formed from a resin molding including the hinge as a living hinge.

According to the third aspect, in addition to the configurations of the first or second aspect, when the second half is in the coupled position, the first half and the second half are connected to the drive shaft of the motor. form a continuous mating surface with all but one opening to allow placement of the

According to the fourth aspect, in addition to the configuration of any one of the first to third aspects, the vehicle seat stands facing the motor from the inner wall surfaces of the first half and the second half, It further includes a rib having a thickness that stores elastic force by contacting the motor at its tip when the second half is placed at the coupling position.

According to the fifth aspect, in addition to the configuration of any one of the first to fourth aspects, the vehicle seat includes a pedestal fixed to the frame and receiving the motor on a mounting surface; and the second half body, and when the second half body is positioned at the coupling position, it engages with a specific portion of the pedestal to prevent the soundproof cover from coming off in the vertical direction of the mounting surface. It further comprises a projecting piece that does.

According to the sixth aspect, in addition to the configuration of any one of the first to fifth aspects, at least one of the first half and the second half is connected to the space in contact with the motor through a through hole. partitions the resonance space.

According to the first aspect, the second half of the soundproof cover moves away from the first half in the open position, so that the first half can partially cover the motor without being obstructed by the second half. . The motor can be accommodated between the second half and the first half when the second half is positioned in the coupled position by the action of the hinge. The soundproof cover can thus be attached to the motor. The soundproof cover can be attached to the motor with a simple assembly operation.

According to the second aspect, soundproofing can be effectively achieved. In addition, the acoustic cover can be lightweight and inexpensive to manufacture.

According to the third aspect, in the motor the drive power is taken out from the drive shaft. Since the mating surfaces of the first and second halves are continuous except for one opening that allows placement of the drive shaft, the motor can be covered by the first and second halves except for the opening. . The motor can be covered with a soundproof cover as wide as possible. Motor noise can be well confined within the acoustic cover.

According to the fourth aspect, when the motor is accommodated in the soundproof cover, the soundproof cover can be prevented from rattling according to the elastic force of the rib. The dimensional error of the soundproof cover or the motor can be absorbed according to the elastic deformation of the ribs. The elastic force of the rib can strengthen the engagement of the engaging piece with the first half. Even if the vehicle body vibrates, the separation of the soundproof cover from the motor can be prevented.

According to the fifth aspect, when the soundproof cover is attached to the motor fixed to the pedestal, the protrusion can be engaged with a specific portion of the pedestal. Even if the vibration of the vehicle body is transmitted from the frame to the motor, it is possible to prevent the soundproof cover from coming off in the vertical direction of the mounting surface.

According to the sixth aspect, the specific frequency component of noise can be efficiently attenuated by the action of the resonant space.

1 is a perspective view schematically showing the overall configuration of a vehicle seat according to an embodiment of the invention; FIG. 1 is a perspective view schematically showing the structure of a seat frame; FIG. FIG. 2 is a perspective view schematically showing configurations of a seat cushion pad and a seat back pad; (A) Conceptual diagram showing the configuration of the soundproof cover attached to the electric motor of the electric back-and-forth movement device, (B) Plan view of the unfolded soundproof cover alone, and (C) Side view of the unfolded soundproof cover alone. is. FIG. 4 is a plan view showing an electric motor of the electric back-and-forth moving device; FIG. 4 is a plan view of the soundproof cover unfolded when attached to the electric motor of the electric vertical movement device; (A) A plan view of the unfolded soundproof cover alone, and (B) a side view of the unfolded soundproof cover alone. FIG. 11 is a cross-sectional view of a soundproof cover according to a modified example;

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, front and rear, left and right, and up and down refer to directions viewed from a passenger seated on a vehicle seat in a normal sitting posture (for example, a basic posture during driving).

FIG. 1 schematically shows the overall configuration of a vehicle seat according to one embodiment of the present invention. The vehicle seat 11 includes slide rails 13 coupled to a floor panel 12 that functions as one component of the monocoque structure of the vehicle, for example, and is supported by the slide rails 13 so as to be movable in the front-rear direction so as to support the buttocks and thighs of the occupant. a seat back 15 that is connected to the seat cushion 14 so as to be swingable in the front-rear direction about the swing axis SX and receives the back of the occupant; a headrest 16 for receiving the head of the The seat cushion 14, the seat back 15 and the headrest 16 each have skin materials 14a, 15a, 16a that wrap the inner pads. The upholstery materials 15a and 16a adhere to the outer surface of the pad following the recesses of the pad by the action of the hanging thread 17. - 特許庁Details of the pad will be described later. The vehicle seat 11 is configured for the left seat. When the vehicle seat 11 is used for the right seat, the left and right sides of the vehicle seat 11 may be interchanged.

The seat cushion 14 has side covers (cover members) 18 . A first switch (operating member) 19 a and a second switch (operating member) 19 b are attached to the side cover 18 . The first switch 19a is formed by a knob that is long in the front-rear direction. When the first switch 19a is operated forward, the seat cushion 14 and the seat back 15 move forward. When the first switch 19a is operated rearward, the seat cushion 14 and the seat back 15 move rearward. When the first switch 19a is operated upward, the seat cushion 14 and the seat back 15 move upward. When the first switch 19a is operated downward, the seat cushion 14 and the seat back 15 move downward. The second switch 19b is formed by a knob that is long in the vertical direction. When the second switch 19b is operated forward, the seat back 15 swings forward about the swing axis SX. When the second switch 19b is operated rearward, the seat back 15 swings rearward about the swing axis SX.

The headrest 16 is fixed to a headrest pillar 21 extending upward from the upper end of the seatback 15 . The headrest pillar 21 is supported by the seat back 15 so as to be axially displaceable in the vertical direction. The height of the headrest 16 can be adjusted according to the displacement of the headrest pillar 21 .

As shown in FIG. 2, the vehicle seat 11 includes a seat frame 23 that supports pads. The seat frame 23 includes a seat cushion frame 24 that supports the pad of the seat cushion 14, and a seat back frame 25 that is connected to the seat cushion frame 24 so as to be swingable about the swing axis SX and supports the pad of the seat back 15. and a base frame 26 that is guided by the slide rail 13 so as to be movable back and forth in the longitudinal direction and supports the seat cushion frame 24 on the slide rail 13 . The seat cushion frame 24 is connected to the base frame 26 with a link mechanism 27 . One end of the link mechanism 27 is connected to the base frame 26 so as to be rotatable about a horizontal axis FH extending in the left-right direction. A link member 28 is provided having an opposite end to which it is coupled. The link member 28 guides the vertical movement of the seat cushion frame 24 with respect to the base frame 26 around the horizontal axis FH.

The seat cushion frame 24 includes side frames 24a extending along the individual slide rails 13, pan frames 24b connecting the side frames 24a at the front ends of the seat cushions 14, and side frames 24a at the rear ends of the seat cushions 14. and a connecting pipe 24c to be connected. A plurality of S springs (not shown) are arranged between the pan frame 24b and the connecting pipe 24c. The individual S-springs extend back and forth in a zigzag shape. The zigzag shape is formed by alternately combining wire rods extending in the front-rear direction and wire rods extending in the left-right direction.

An electric forward/backward moving device 29 is attached to the base frame 26 . The electric back-and-forth movement device 29 includes an electric motor unit 31 supported by the base frame 26 . The electric motor unit 31 is connected with a connector 32 extending from the electric motor unit 31 in parallel with the swing axis SX and coupled to the right base frame 26 . As will be described later, the electric motor unit 31 includes an electric motor that generates power in response to the supply of electric power. Electric power is supplied based on the operation of the first switch 19a. The power of the electric motor unit 31 causes the base frame 26 to move back and forth along the slide rails 13 .

An electric vertical movement device 33 is attached to the side frame 24 a of the seat cushion frame 24 . The electric vertical movement device 33 includes an actuator 34 that is supported by the side frame 24 a and connected to the link mechanism 27 . The actuator 34 is arranged on the outside of the side frame 24a and receives the electric motor 35 on the mounting surface 36a while being fixed to the side frame 24a to transmit power. A gearbox (pedestal) 36 that houses a mechanism, a female coupler 39 that is integrally formed with the gearbox 36 and receives a male coupler 38 of a harness 37 used for power supply, and a soundproof cover that is attached to the electric motor 35. 41. The transmission mechanism includes, for example, a worm fixed to the drive shaft of the electric motor 35, a worm wheel that cooperates with the worm to form a worm gear, a driven gear fixed to the link member 28 around the horizontal axis SH, and a driven gear. gears that mesh with each other to transmit power from the wormwheel to the driven gear. The power of the electric motor 35 causes the link member 28 to rotate about the horizontal axis SH with respect to the side frame 24a. Electric power is supplied based on the operation of the first switch 19a. The power of the electric motor 35 causes the side frame 24a to move up and down about the horizontal axis FH.

A support shaft 44 is incorporated in the seat cushion frame 24 so as to be coaxial with the swing axis SX above and behind the connecting pipe 24c. The support shaft 44 is formed, for example, from a hollow metal tube. A metal tube has a high stiffness in the axial direction. The support shaft 44 is sandwiched between the left and right side frames 24a. The seatback frame 25 is supported by the support shaft 44 .

The seat back frame 25 includes a sheet metal frame 25a connected to the inside of each side frame 24a by a support shaft 44, and an upper frame 25b connecting upper ends of the sheet metal frames 25a. The sheet metal frame 25a is formed, for example, from one sheet of metal plate. The upper frame 25b is formed, for example, from a metal tube. A headrest pillar guide 45 that supports the headrest pillar 21 in a vertically slidable manner is fixed to the upper frame 25b.

An electric reclining device 46 is attached to the sheet metal frame 25 a of the seat back frame 25 . The electric reclining device 46 includes an actuator 47 attached to the sheet metal frame 25a of the seat back frame 25 around the swing axis SX. The actuator 47 is arranged inside the sheet metal frame 25a and includes an electric motor 48 that generates power in response to the supply of electric power, a base 49 that is fixed to the sheet metal frame 25a and receives the electric motor 48 on a mounting surface 49a, and a soundproof cover 51 attached to the electric motor 48 . The power of the electric motor 48 is converted into driving force around the swing axis SX by the action of the transmission mechanism. The transmission mechanism may include, for example, a worm fixed to the drive shaft of the electric motor 48, and a worm wheel that cooperates with the worm to form a worm gear and is fixed to the support shaft 44 around the swing axis SX. can. Power is supplied based on the operation of the second switch 19b. The power of the electric motor 48 causes the seat back frame 25 to swing back and forth with respect to the seat cushion frame 24 about the swing axis SX.

As shown in FIG. 3, the seat cushion 14 further includes a seat cushion pad 53 supported by the seat cushion frame 24 and wrapped by the upholstery 14a. The seatback 15 further includes a seatback pad 54 supported by the seatback frame 25 and wrapped in the upholstery material 15a. The seat cushion pad 53 and the seat back pad 54 are made of an elastic material such as urethane foam.

As shown in FIG. 4 , the electric motor unit 31 of the electric forward/backward movement device 29 includes a soundproof cover 56 attached to the electric motor 55 . The soundproof cover 56 is made of, for example, a resin molding. The soundproof cover 56 includes a first half 56a that partially covers the electric motor 55, and a second half 56b that is coupled to the first half 56a and accommodates the electric motor 55 between the first half 56a. and A right end of the soundproof cover 56 is defined with one opening (hereinafter referred to as “first opening”) 57 that allows the arrangement of the connecting body 32 . A drive shaft extending from the electric motor 55 toward the right base frame 26 can be accommodated in the connector 32 . The drive shaft may be arranged in parallel with the connector 32 . At the left end of the soundproof cover 56, there is an opening (hereinafter referred to as a "second opening") that allows placement of a support leg 58 that extends from the electric motor 55 toward the left base frame 26 and fixes the electric motor 55 to the left base frame 26. ) 59 are partitioned. A drive shaft extending from the electric motor 55 toward the left base frame 26 can be arranged in the second opening 59 . The drive shaft may be arranged in parallel with the support leg 58 . The second opening 59 is followed by one opening 62 that allows placement of a male coupler 61 protruding from the electric motor 55 .

A living hinge 63 is formed between the first half 56a and the second half 56b to connect the first half 56a and the second half 56b. The living hinge 63 allows the second half 56b to be displaced between an open position away from the first half 56a and a coupled position accommodating the electric motor 55 between the first half 56a. can. The second half body 56b is integrally formed with an engagement piece 64 that engages with the first half body 56a according to an elastic force to hold the second half body 56b in the coupling position.

Here, the engagement piece 64 extends from the edge of the second half 56b along the outer surface of the first half 56a, and is formed of a frame surrounding a specified space 64a. A projection 65 is formed on the outer surface of the first half 56a corresponding to the space 64a in the frame. When the second half 56b is positioned at the coupling position, the projection 65 enters the space 64a in the frame. A contact surface may be formed on the protrusion 65 to constrain the frame at the coupling position of the second half 56b. The projection 65 preferably has a sliding surface that promotes elastic deformation of the frame in a direction away from the outer surface of the first half 56a when the second half 56b is displaced from the open position to the coupling position. Displacement of the frame is preferably restricted in the centrifugal direction from the rotation axis 66 of the living hinge 63 .

The first and second halves 56a and 56b form a continuous mating surface 67 except for the first and second openings 57 and 59 when the second half 56b is in the mating position. The first half 56a and the second half 56b are overlapped with each other at mating surfaces 67. As shown in FIG. The overlapping position can be regulated by a living hinge 63 . The engaging piece 64 and the projection 65 may be arranged on the opposite side from the living hinge 63 across the space for housing the electric motor 55 .

The first half 56a and the second half 56b have a peripheral wall 68a surrounding the housing space of the electric motor 55, and an end wall 68b continuing from the right end of the peripheral wall 68a and blocking one end of the housing space. The left end of the peripheral wall 68a is cut off. That is, the other end of the accommodation space is open. The open end of the receiving space forms a second opening 59 . The mating surface 67 of the end wall 68b is formed with a first notch 69a that forms the first opening 57 when the second half 56b is in the coupled position. A mating surface 67 of the peripheral wall 68a is formed with a second notch 69b that forms the opening 62 when the second half 56b is positioned at the coupling position. The second notch 69b continues from the left end of the peripheral wall.

The inner wall surfaces of the first half 56a and the second half 56b are provided with ribs 71 that stand facing the electric motor 55 and contact the electric motor 55 at the tips thereof when the second half 56b is placed in the coupled position. It is formed. The rib 71 extends parallel to the rotation axis 66 of the living hinge 63, for example. The rib 71 has a thickness that stores elastic force by contacting the electric motor 55 at the tip thereof when the second half 56b is arranged at the coupling position. Depending on the elastic force of the ribs 71 , a repulsive force that moves away from the outer surface of the electric motor 55 can be generated in the first half 56 a and the second half 56 b.

As shown in FIG. 5, the electric motor 55 extends parallel to the swing axis SX and protrudes from a housing 72 that houses the stator and rotor and other components, and from the outer periphery of the housing 72 to supply electric power. a female coupler 75 for receiving a male coupler 74 of a harness 73 used for supply. The connector 32 extends from the right end of the housing 72 toward the right base frame 26 . Support leg 58 extends from the left end of housing 72 toward left base frame 26 .

As shown in FIGS. 6 and 7, the soundproof cover 41 of the actuator 34 is made of resin molding, for example. The soundproof cover 41 includes a first half 41a that partially covers the electric motor 35, and a second half 41b that is coupled to the first half 41a and accommodates the electric motor 35 between the first half 41a. and One opening 77 is defined at the rear end of the soundproof cover 41 to allow placement of a drive shaft entering the gearbox 36 from the electric motor 35 .

A living hinge 78 is formed between the first half 41a and the second half 41b to connect the first half 41a and the second half 41b. The living hinge 78 allows the second half 41b to be displaced between an open position away from the first half 41a and a coupled position accommodating the electric motor 35 with the first half 41a. can. The second half body 41b is integrally formed with an engagement piece 79 that engages with the first half body 41a according to elastic force to hold the second half body 41b in the coupling position.

Here, the engagement piece 79 extends from the edge of the second half body 41b along the outer surface of the first half body 41a and is formed of a frame surrounding a defined space 79a. A projection 81 is formed on the outer surface of the first half 41a corresponding to the space 79a in the frame. When the second half 41b is positioned at the coupling position, the projection 81 enters the space 79a in the frame. The protrusion 81 may be formed with a contact surface for restraining the frame at the coupling position of the second half 41b. The projection 81 preferably has a sliding surface that promotes elastic deformation of the frame in a direction away from the outer surface of the first half 41a when the second half 41b is displaced from the open position to the coupled position. Displacement of the frame is preferably restricted in the centrifugal direction from the rotation axis 82 of the living hinge 78 .

When the second half 41 b is in the mating position, the first half 41 a and the second half 41 b form a continuous mating surface 83 other than the opening 77 . The first half 41 a and the second half 41 b are overlapped with each other at mating surfaces 83 . The overlapping position can be restricted with a living hinge 78 . The engaging piece 79 and the protrusion 81 may be arranged on the opposite side from the living hinge 78 across the space for housing the electric motor 35 .

The first half 41a and the second half 41b have a peripheral wall 84a surrounding the housing space of the electric motor 35, and an end wall 84b continuing from the front end of the peripheral wall 84a and blocking one end of the housing space. The rear end of the peripheral wall 84a is interrupted. That is, the other end of the accommodation space is open. The open end of the receiving space forms an opening 77 .

On the inner wall surfaces of the first half 41a and the second half 41b, there is a rib 85 that stands facing the electric motor 35 and contacts the electric motor 35 at its tip when the second half 41b is arranged in the coupling position. It is formed. The ribs 85 extend parallel to the axis of rotation 82 of the living hinge 78, for example. The rib 85 has a thickness that stores elastic force by contacting the electric motor 35 at the tip when the second half 41b is arranged at the coupling position. Depending on the elastic force of the ribs 85, a repulsive force that moves away from the outer surface of the electric motor 35 can be generated in the first half 41a and the second half 41b.

A hook piece 86 continuously protruding rearward from the rear end of the peripheral wall 84a is formed on the second half 41b. At the tip of the hook piece 86, a claw 86a is formed that faces the gear box 36 when the second half 41b is arranged at the coupling position when the soundproof cover 41 is attached to the electric motor 35. As shown in FIG. The claws 86a mesh with specific portions of the gearbox 36 to prevent the soundproof cover 41 from coming off in the vertical direction of the mounting surface 36a. A specific portion of the gearbox 36 is formed with a meshing surface 87 that faces rearward on the back side of the mounting surface 36a and receives the meshing of the claws 86a. The electric motor 35 is fixed to the mounting surface 36 a of the gear box 36 with screws 88 . The soundproof cover 51 of the actuator 47 may be constructed similarly to the soundproof cover 41 .

Electric power is supplied to the electric motor 55 when the first switch 19a is operated forward or backward. The electric motor 55 is activated. Driving force is taken out from the drive shaft of the electric motor 55 . The seat cushion 14 and the seat back 15 can be moved back and forth based on the driving force. At this time, the operating noise of the electric motor 55 is confined within the soundproof cover 56 . The quietness in the passenger compartment can be enhanced.

Electric power is supplied to the electric motor 35 when the first switch 19a is operated upward or downward. The electric motor 35 is activated. Driving force is taken out from the drive shaft of the electric motor 35 . A driving force is transmitted to the link member 28 from the transmission mechanism. A vertical movement of the seat cushion 14 and the seat back 15 can be realized. At this time, the operating noise of the electric motor 35 is confined within the soundproof cover 41 . The quietness in the passenger compartment can be enhanced.

Electric power is supplied to the electric motor 48 when the second switch 19b is operated forward or backward. The electric motor 48 is activated. Driving force is taken out from the drive shaft of the electric motor 48 . The forward and backward movement of the seat back 15 can be achieved based on the driving force. At this time, the operating noise of the electric motor 48 is confined within the soundproof cover 51 . The quietness in the passenger compartment can be enhanced.

In the actuator 34 of the vehicle seat 11 according to the present embodiment, the first half 41a and the second half 41b have a continuous mating surface 83 other than one opening 77 that allows the drive shaft of the electric motor 35 to be arranged. Form. Since the mating surfaces 83 of the first half 41a and the second half 41b are continuous except for one opening 77 that allows the arrangement of the drive shaft, the electric motor 35 can be connected to the first half 41a and the second half 41b except for the opening 77. It can be covered with half body 41b. The electric motor 35 can be covered with a soundproof cover 41 as wide as possible. The noise of the electric motor 35 can be well confined within the soundproof cover 41 .

Similarly, in the electric motor unit 31 of the vehicle seat 11 according to this embodiment, the first half 56a and the second half 56b form a continuous mating surface 67 other than the first opening 57 and the second opening 59. . Since the mating surface 67 of the first half body 56 a and the second half body 56 b is continuous except for the first opening 57 and the second opening 59 , the electric motor 55 can move the first half body other than the first opening 57 and the second opening 59 . It can be covered by a body 56a and a second half 56b. The electric motor 55 can be covered with a soundproof cover 56 as wide as possible. The noise of the electric motor 55 can be well confined within the soundproof cover 56 .

In the soundproof covers 41, 56, the inner wall surfaces of the first halves 41a, 56a and the second halves 41b, 56b stand toward the electric motors 35, 55, and the second halves 41b, 56b are arranged at the coupling position. Further provided are ribs 85, 71 having a thickness that stores elastic force by contacting the electric motors 35, 55 at the tips thereof. The rattling of the soundproof covers 41 and 56 can be prevented according to the elastic force of the ribs 85 and 71 . Dimensional errors of the soundproof covers 41 and 56 or the electric motors 35 and 55 can be absorbed according to the elastic deformation of the ribs 85 and 71 . The elastic force of the ribs 85, 71 can strengthen the engagement of the engaging pieces 79, 64 with the first half bodies 41a, 56a. Even if the vehicle body vibrates, separation of the soundproof covers 41, 56 from the electric motors 35, 55 can be effectively prevented. Similarly, the soundproof cover 51 can be prevented from rattling according to the formation of the ribs.

In the actuator 34 according to the present embodiment, a hook piece 86 that meshes with a specific portion of the gearbox 36 and prevents the soundproof cover 41 from coming off in the vertical direction of the mounting surface 36a is formed on the second half 41b. When the soundproof cover 41 is attached to the electric motor 35 fixed to the gearbox 36 , the hook piece 86 can mesh with the meshing surface 87 of the gearbox 36 . Even if the vibration of the vehicle body is transmitted from the seat frame 23 to the electric motor 35, the soundproof cover 41 can be prevented from coming off in the vertical direction of the mounting surface 36a. Similarly, the actuator 47 can also prevent the soundproof cover 51 from coming off in the vertical direction of the mounting surface 49a according to the formation of the projecting piece. For engagement of the projecting piece, the pedestal 49 may be formed with, for example, a recess for receiving the entry of the projecting piece.

In manufacturing the vehicle seat 11 , the electric motor 55 is attached to the seat frame 23 . After that, the soundproof cover 56 is attached to the electric motor 55 . Since the second half 56b of the soundproof cover 56 moves away from the first half 56a in the open position, the first half 56a can partially cover the electric motor 55 without being obstructed by the second half 56b. . When the second half 56b is positioned at the coupling position by the action of the living hinge 63, the electric motor 55 can be housed between the second half 56b and the first half 56a. The soundproof cover 56 can thus be attached to the electric motor 55 . The soundproof cover 56 can be attached to the electric motor 55 by simple assembly work.

Similarly, electric motor 35 is attached to seat frame 23 . After that, the soundproof cover 41 is attached to the electric motor 35 . Since the second half 41b of the soundproof cover 41 moves away from the first half 41a in the open position, the first half 41a can partially cover the electric motor 35 without being obstructed by the second half 41b. . When the second half 41b is positioned at the coupling position by the action of the living hinge 78, the electric motor 35 can be accommodated between the second half 41b and the first half 41a. The soundproof cover 41 can thus be attached to the electric motor 35 . The soundproof cover 41 can be attached to the electric motor 35 by simple assembly work. Since the soundproof cover 51 has the same structure as the soundproof cover 41, the soundproof cover 51 can be attached to the electric motor 48 by a simple assembly work.

As shown in FIG. 8 , in the soundproof cover 56 , the first half 56 a and the second half 56 b may define a resonance space 92 connected to the space in contact with the electric motor 55 via a through hole 91 . The resonance space 92 can efficiently attenuate specific frequency components of noise based on the principle of Helmholtz resonance. Similarly, the soundproof covers 41 and 51 may be partitioned with resonance spaces.

REFERENCE SIGNS LIST 11 vehicle seat 23 frame (seat frame) 35 motor (electric motor) 36 pedestal (gearbox) 36a mounting surface 41 soundproof cover 41a first half 41b second 2 halves 48 motor (electric motor) 49 pedestal 49a mounting surface 51 soundproof cover 55 motor (electric motor) 56 soundproof cover 56a first half 56b second Half body 63 Hinge (living hinge) 64 Engaging piece 71 Rib 77 Opening 78 Hinge (living hinge) 79 Engaging piece 83 Mating surface 85 Rib 86 Protruding piece (hook piece), 91 ... through hole, 92 ... resonance space.

Claims (6)

a frame;
a motor supported by the frame;
A soundproof cover attached to the motor,
The soundproof cover is
a first half that partially covers the motor;
hinged to the first half and displaced by the action of the hinge between an open position away from the first half and a coupled position accommodating the motor between the first half; a second half that
and an engaging piece integrally formed with the second half body and engaged with the first half body according to elastic force to hold the second half body at the coupling position. sheet for. 2. The vehicle seat according to claim 1, wherein said soundproof cover is formed from a resin molding including said hinge as a living hinge. 3. The vehicle seat according to claim 1 or 2, wherein said first half and said second half allow placement of a drive shaft of said motor when said second half is positioned at said coupling position. A vehicle seat characterized by forming a continuous mating surface other than one opening. 4. The vehicle seat according to any one of claims 1 to 3, wherein the inner wall surfaces of the first half and the second half stand facing the motor, and the second half is arranged at the coupling position. A vehicle seat, further comprising: a rib having a thickness that stores elastic force by contacting the motor at its tip when the rib is pressed. In the vehicle seat according to any one of claims 1 to 4,
a pedestal fixed to the frame and receiving the motor on a mounting surface;
It is formed on at least one of the first half and the second half, and when the second half is positioned at the coupling position, it meshes with a specific portion of the pedestal to extend the soundproofing in the vertical direction of the mounting surface. A vehicle seat, further comprising a projecting piece that prevents the cover from coming off. 6. The vehicle seat according to any one of claims 1 to 5, wherein at least one of said first half and said second half defines a resonance space connected to a space in contact with said motor via a through hole. A vehicle seat characterized by:

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