JP6578792B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat, and more particularly to a front and rear adjustment type vehicle seat having an active suspension device.

  2. Description of the Related Art As a seat used for a body of an automobile or the like, an active suspension device having an antiphase generator that generates an antiphase vibration with respect to an input vibration from the car body is provided between a seat cushion portion and a vehicle. (For example, Patent Documents 1 and 2).

JP-T-2006-509673 JP 2014-213753 A

  In conventional vehicle seats, the active suspension device is mounted between the seat cushion and the vehicle floor panel. Therefore, if the shape of the floor panel changes, the mounting structure of the active suspension device on the floor panel must be changed. Is generated and lacks versatility.

  An active suspension device for a front-rear adjustment type vehicle seat in which a seat cushion portion is provided to be movable in the front-rear direction of the vehicle body by a lower rail attached to the floor panel and an upper rail (slider) movably engaged with the lower rail. Is provided between the lower rail and the floor panel. For this reason, the front-rear direction position of the active suspension device with respect to the seat cushion portion is changed by the front-rear direction movement of the seat cushion portion, and this change changes the vibration reduction characteristics that the active suspension device gives to the seat cushion portion, and the appropriate vibration reduction state Will not be maintained.

  The problem to be solved by the present invention is that even if the position of the seat cushion portion changes in the longitudinal direction of the vehicle body due to the longitudinal adjustment of the vehicle seat, the vibration reduction characteristic that the active suspension device gives to the seat cushion portion varies. In addition, there is no need to change the mounting structure of the active suspension device with respect to the vehicle body even if the shape of the vehicle body such as a floor panel changes.

  A vehicle seat according to the present invention includes a lower rail (16) fixed to a vehicle body (10) and an upper rail (18) movably engaged with the lower rail (16), and the seat is attached to the upper rail (18). A vehicle seat in which a side frame (22) of a cushion portion (20) is disposed, wherein an active suspension device (40, 120) is attached between the upper rail (18) and the side frame (22). Yes.

  According to this configuration, even if the position of the seat cushion portion (20) changes, the positional relationship in the front-rear direction between the seat cushion portion (20) and the active suspension device (40, 120) does not change. Even if the position of the seat cushion portion (20) changes, the vibration reduction characteristics that the active suspension device (40, 120) gives to the seat cushion portion (20) do not fluctuate, and stable vibration reduction is performed. Further, even if the shape of the vehicle body changes, it is not necessary to change the mounting structure of the active suspension device (40, 120) with respect to the vehicle body.

  In the vehicle seat according to the present invention, preferably, the lower rail (16) extends in the front-rear direction and is provided in a pair of left and right, and the upper rail (18) engages with each of the left and right lower rails (16). Can be moved back and forth.

  According to this configuration, even if the position of the seat cushion portion (20) changes in the front-rear direction, the positional relationship in the front-rear direction between the seat cushion portion (20) and the active suspension device (40, 120) may vary. Absent.

  In the vehicle seat according to the present invention, preferably, the active suspension device (40) is individually provided at each of a front portion and a rear portion of the side frame (22).

  According to this configuration, the seat cushion portion (20) is supported at the four corners by the active suspension device (40), and vibration transmission can be effectively suppressed at each support point.

  In the vehicle seat according to the present invention, preferably, a back frame (26) is attached to a rear portion of the side frame (22) by a reclining device (24) so that an inclination angle with respect to the side frame (22) can be changed. At least one of the active suspension devices (40) is provided below the reclining device (24).

  According to this configuration, vibration transmitted to the seat cushion portion (20) can be effectively suppressed, and riding comfort can be effectively improved.

  In the vehicle seat according to the present invention, preferably, at least one of the active suspension devices (40) is provided at a position corresponding to the hip point (HP) of a seated occupant when viewed from the left-right direction.

  According to this configuration, it is possible to effectively suppress vibration transmitted to the seat cushion portion (20) at a position corresponding to the hip point (HP) and to effectively improve riding comfort.

  In the vehicle seat according to the present invention, a recess (28) is preferably formed in the side frame (22), and the active suspension device (40) is provided in the recess (28).

  According to this configuration, the active suspension device (40) is at least partially disposed at the same height as the side frame (22) in a side view, so that the height of the seat cushion (20) is high. The height of the suspension is suppressed by the arrangement of the active suspension device (40).

  In the vehicle seat according to the present invention, preferably, the side frame (22) is formed with a downward-opening box-shaped depression (28) that is recessed inward from the outside of the lateral side surface in the left-right direction. The active suspension device (40) is provided in (28).

  According to this configuration, the active suspension device (40) does not become bulky due to the effective use of the dead space inside the side frame (22), and at least a part of the active suspension device (40) is seen from the side frame (22). ), The height of the seat cushion portion (20) is suppressed from being increased by the arrangement of the active suspension device (40).

  In the vehicle seat according to the present invention, preferably, the side frames (22) are provided in a pair of left and right sides, and left and right end portions are respectively joined to a wall (28D) that defines the recess (28), The connecting rods (30, 32) extend in the left-right direction and connect the left and right side frames (22) to each other.

  According to this configuration, the connection strength of the left and right side frames (22) by the connection rods (30, 32) is increased, and the seat cushion portion (20) is highly rigid under the effective use of the recess portion (28). It will be durable.

  In the vehicle seat according to the present invention, preferably, the active suspension device (120) continuously extends in the front-rear direction between the upper rail (18) and the side frame (22).

  Even in this configuration, even if the position of the seat cushion portion (20) changes in the front-rear direction, the vibration reduction characteristics that the active suspension device (120) gives to the seat cushion portion (20) do not fluctuate.

  In the vehicle seat according to the present invention, preferably, the active suspension device (40, 120) is connected to a liquid ring mount (70, 138) for damping vibration and the liquid ring mount (70, 138). And anti-phase generators (100, 160) that generate vibrations having a phase opposite to that of the input vibration from the vehicle body, and the liquid seal mounts (70, 138) are directly connected to the upper rail, The generators (100, 160) are directly connected to the side frame (22).

  According to this configuration, the antiphase generator (100, 160) is not vibrated by the input vibration including the low frequency and small amplitude vibration attenuated by the liquid seal mount (70, 138). The durability of the phase generator (100, 160) can be improved.

  According to the vehicle seat of the present invention, since the active suspension device is attached between the upper rail and the side frame of the seat cushion portion, the active suspension device can be used even if the position of the seat cushion portion changes. The vibration reduction characteristics applied to the slab are not changed. Further, even if the shape of the vehicle body changes, it is not necessary to change the mounting structure of the active suspension device with respect to the vehicle body.

The perspective view which shows Embodiment 1 of the vehicle seat by this invention. Side view of the vehicle seat according to the first embodiment. 1 is a longitudinal sectional view of an active suspension device used for a vehicle seat according to Embodiment 1. FIG. The side view which shows Embodiment 2 of the vehicle seat by this invention The side view which shows Embodiment 3 of the vehicle seat by this invention. A longitudinal sectional view of an active suspension device used for a vehicle seat according to Embodiment 3 Sectional view along line VII-VII in FIG.

  Below, Embodiment 1 of the vehicle seat by this invention is demonstrated with reference to FIGS. 1-3.

  As shown in FIGS. 1 and 2, a pair of left and right lower rails 16 are mounted substantially horizontally on the floor panel (vehicle body) 10 by front and rear mounting members 12 and 14. The left and right lower rails 16 extend parallel to each other in the front-rear direction of the vehicle body.

  The left and right lower rails 16 are respectively engaged with the left and right upper rails 18 so as to be movable in the front-rear direction of the vehicle body. Side frames 22 corresponding to the left and right sides of the seat cushion portion (seat cushion frame) 20 are attached to the left and right upper rails 18 via an active suspension device 40. As described above, the left and right side frames 22 are provided in pairs, and are provided along the extending direction of the upper rail 18.

  A back frame 26 is attached to a rear portion of the side frame 22 by a reclining device 24 so that an inclination angle with respect to the side frame 22 can be changed. A cushion pad (not shown) covered with a skin material is attached to the back frame 26.

  In the vicinity of the front end and the rear end of the left and right side frames 22, recessed portions 28 that are recessed from the outside to the inside of the side surface 22A in the left-right direction are press-molded. The recess 28 has a box shape that is open downward by a front wall 28A and a rear wall 28B that are parallel to each other, and a wall 28C and a ceiling wall (upper wall) 28D that connect the front wall 28A and the rear wall 28B to each other. Yes. A recess 28 on the rear end side of the side frame 22 is below the reclining device 24. More specifically, the center position in the front-rear direction of the recess 28 is located immediately below the axial center position of the reclining device 24.

  The left and right side frames 22 are connected to each other by a rear connecting rod 30 that extends in the left and right direction by joining the left and right end portions to a recess 28 on the rear end side of the corresponding side frame 22 on the left and right sides by welding or the like. ing. The left and right side frames 22 are connected to each other by a front side connecting rod 32 that extends in the left-right direction by joining the left and right end portions to a recess 28 on the front end side of the side frame 22 on the corresponding left and right side by welding or the like. ing. More specifically, the left and right end portions of the rear side connecting rod 30 and the front side connecting rod 32 are joined to the outer surface of the flange wall 28C of the recessed portion 28, respectively. The front end portions of the left and right side frames 22 are connected to each other by a front end connecting member 34.

  In this way, the skeletal structure of the seat cushion portion 20 is configured, and a cushion pad (not shown) covered with a skin material is attached to the seat cushion portion 20.

  There are a total of four depressions 28, and an active suspension device 40 is disposed in each depression 28. The active suspension device 40 is disposed in the recess 28 so that substantially the whole is accommodated in the recess 28. In this way, the active suspension device 40 is individually provided at each of the front and rear portions of the side frame 22. The active suspension device 40 provided at the rear portion of the side frame 22 is provided below the reclining device 24 from the position in the front-rear direction of the recess 28 on the rear end side of the side frame 22.

  The details of the active suspension device 40 will be described with reference to FIG. The active suspension device 40 includes a lower boss member 42, a substantially cylindrical lower housing 44, and a substantially cylindrical upper inner housing 46 and upper outer housing 48 that are caulked to the upper portion of the lower housing 44. The lower boss member 42 integrally has a mounting piece 42 </ b> A protruding downward, and the mounting piece 42 </ b> A is fixed to the upper rail 18 by bolts and nuts 98.

  The lower boss member 42 is vulcanized and bonded to the lower end of a vibration-proof elastic body 50 made of rubber or the like. The anti-vibration elastic body 50 has a substantially truncated conical shape inverted upside down, the truncated side forming the lower end is vulcanized and bonded to the lower boss member 42, and the connecting member having a substantially cylindrical shape is formed on the conical skirt forming the upper end. 52 is vulcanized and bonded. The connection member 52 is fastened to the caulked portion between the lower housing 44, the upper inner housing 46 and the upper outer housing 48.

  Around the outer periphery of the vibration-proof elastic body 50, a bottomed substantially cylindrical diaphragm 54 made of rubber or the like having one end vulcanized and bonded to the lower boss member 42 and the lower end vulcanized and bonded to the lower housing 44 is provided. Yes. Between the lower housing 44 and the upper inner housing 46, a partition plate 56 that divides the interior of these housings vertically is fastened together with the caulking portions of these housings.

  The anti-vibration elastic body 50 and the connection member 52 define a first liquid chamber 58 between the partition plate 56. The anti-vibration elastic body 50 defines a second liquid chamber 60 between the diaphragm 54 and the diaphragm 54. The first liquid chamber 58 and the second liquid chamber 60 are filled with a liquid such as oil having an appropriate viscosity together with communication paths 64 and 66 and a third liquid chamber 76 which will be described later.

  The first liquid chamber 58 and the second liquid chamber 60 include an opening 62 formed in the connection member 52, a communication path 64 defined between the connection member 52 and the lower housing 44, and the vibration-proof elastic body 50 and the lower housing. Communicating with each other by a communication passage 66 defined between them.

  In this way, the liquid seal mount portion 70 is configured between the lower boss member 42 and the lower housing 44.

  A substantially disc-shaped vibration member 74 is provided in the upper inner housing 46 by an elastic body 72 such as rubber. One end of the elastic body 72 is vulcanized and bonded to the outer peripheral surface of the vibration member 74 and the other end is vulcanized and bonded to the inner peripheral surface of the upper inner housing 46. A third liquid chamber 76 is defined between them. A communication hole 78 is formed in the partition plate 56. The third liquid chamber 76 communicates with the first liquid chamber 58 through a communication hole 78.

  The vibration member 74 is integrally formed with a stem 80 extending from the vibration member 74 to the side opposite to the third liquid chamber 76, that is, upward. A movable core member 82 is fixed to the upper end of the stem 80. ing. In the upper inner housing 46, a coil 84, a resin molded member 90 that seals the coil 84 and forms a connector portion 88 that has a connection terminal 86 of the coil 84 inside, a yoke member 92, and a movable core member 82. A fixed core member 94 is attached.

  The upper outer housing 48 is disposed concentrically on the outer side of the upper inner housing 46 and is fastened to the caulked portion between the lower housing 44 and the upper inner housing 46. The upper outer housing 48 integrally has a mounting flange portion 48A on the upper side, and the mounting flange portion 48A is fixed to the ceiling wall 28D of the recess portion 28 by a plurality of bolts and nuts 96.

  Traveling vibrations and the like are input from the floor panel 10 to the lower boss member 42 of the active suspension device 40 via the mounting member 12, the lower rail 16, and the upper rail 18. When vibration is input to the lower boss member 42, the vibration-proof elastic body 50 that forms the liquid seal mount 70 is elastically deformed by the vibration, and the volume of the first liquid chamber 58 is increased or decreased by the elastic deformation of the vibration-proof elastic body 50. Then, the sealed liquid flows between the first liquid chamber 58 and the second liquid chamber 60 with the elastic deformation of the diaphragm 54. As a result, the liquid ring mount 70 mainly attenuates and absorbs low-frequency and small-amplitude vibrations and suppresses transmission of low-frequency and small-amplitude vibrations to the side frame 22.

  When the coil 84 is energized and the coil 84 is excited, the movable core member 82 is moved upward by magnetic attraction by the fixed core member 94, and the vibration member 74 is lifted along with the elastic deformation of the elastic body 72. It moves and the volume of the 3rd liquid chamber 76 increases. As the volume of the third liquid chamber 76 increases, the sealed liquid in the first liquid chamber 58 flows into the third liquid chamber 76 from the communication hole 78 and the volume of the first liquid chamber 58 decreases, so that the vibration isolating elasticity is increased. The body 50 is elastically deformed downward, and the lower housing 44, the upper inner housing 46, and the upper outer housing 48 move downward with respect to the lower boss member 42.

  When the energization to the coil 84 is stopped and the coil 84 is demagnetized, the magnetic attraction by the fixed core member 94 is lost, the restoring force of the elastic body 72 causes the movable core member 82 and the vibration member 74 to move downward, and the third liquid chamber The volume of 76 is reduced. As the volume of the third liquid chamber 76 decreases, the sealed liquid in the third liquid chamber 76 flows into the first liquid chamber 58 from the communication hole 78 and the volume of the first liquid chamber 58 increases, so that the vibration isolating elasticity is increased. The body 50 is elastically deformed upward, and the lower housing 44, the upper inner housing 46, and the upper outer housing 48 move upward relative to the lower boss member 42.

  Thus, the energization of the coil 84 is controlled in synchronization with the input vibration from the floor panel 10, so that the space between the lower boss member 42 fixed to the upper rail 18 and the upper outer housing 48 solidified on the side frame 22. In addition, an anti-phase generator 100 that generates a vibration having a phase opposite to that of the input vibration from the floor panel 10 is configured. The anti-phase generator 100 mainly absorbs large-amplitude vibration and prevents transmission of the large-amplitude vibration to the side frame 22 by generating vibration (displacement) that cancels the input vibration from the floor panel 10. To do.

  The energization control for the coil 84 synchronized with the input vibration from the floor panel 10 may be performed based on the vertical motion of the side frame 22 detected by the acceleration sensor 102 (see FIG. 1) attached to the side frame 22. it can. As shown in FIG. 1, the acceleration sensor 102 is provided at a position close to each active suspension device 40, and even if individual control is performed for each active suspension device 40, all the active suspension devices 40 are provided. The same integrated control may be performed.

  As described above, since the active suspension device 40 is provided between the upper rail 18 and the side frame 22, even if the position of the seat cushion portion 20 changes in the front-rear direction due to the sliding movement of the upper rail 18 with respect to the lower rail 16, the seat The positional relationship between the cushion portion 20 and the active suspension device 40 in the front-rear direction does not vary. That is, since the active suspension device 40 moves in the front-rear direction together with the seat cushion portion 20, the positional relationship in the front-rear direction between the seat cushion portion 20 and the active suspension device 40 does not change.

  As a result, even if the position of the seat cushion portion 20 changes in the front-rear direction due to the front-rear adjustment of the seat cushion portion 20, the vibration reduction characteristic that the active suspension device 40 gives to the seat cushion portion 20 does not fluctuate, and stable vibration is achieved. Reduction is performed. In particular, when the active suspension device 40 is individually provided at each of the front portion and the rear portion of the side frame 22, each active suspension device with respect to the side frame 22 even if the position of the seat cushion portion 20 changes in the front-rear direction. Even if the position of 40 does not fluctuate and the position of the seat cushion portion 20 in the front-rear direction changes, the desired vibration reduction is always performed.

  In order to reduce the vibration of the seat cushion portion 20, the active suspension devices 40 are provided at the front and rear portions of the left and right side frames 22, respectively. In particular, the rear active suspension device 40 is disposed below the reclining device 24. The fact that the seat cushion part 20 is supported at the four corners effectively suppresses vibration transmission at each support point, and reduces the vibration of the seat cushion part 20 due to running vibration, etc., and improves riding comfort. This is preferable.

  Further, since the active suspension device 40 is provided between the upper rail 18 and the side frame 22, even if the shape of the floor panel 10 is changed, the active suspension device 40 is simply changed by changing the mounting members 12 and 14 of the lower rail 16. There is no need to change the mounting structure of the device 40.

  Since the active suspension device 40 is disposed in the depression 28 that is press-molded on the side frame 22, the active suspension device 40 is not bulky under the effective use of the dead space inside the side frame 22, and the active suspension device 40 is In the side view, at least a part of the seat cushion portion 20 is disposed at the same height as the side frame 22, so that the height of the seat cushion portion 20 is suppressed from being increased by the disposition of the active suspension device 40.

  Since the liquid seal mount 70 is directly connected to the upper rail 18 on the vibration input side, and the antiphase generator 100 is directly connected to the side frame 22, the low frequency and small amplitude attenuated by the liquid seal mount 70. The antiphase generator 100 is not vibrated by input vibration including vibration, and the durability of the antiphase generator 100 is improved. Moreover, since the connector part 88 of the reverse phase generating part 100 is on the side frame 22 side, wiring to the connector part 88 from the side frame 22 side is facilitated, and this wiring part is not excited by input vibration. .

  Further, since the connection of the rear connection rod 30 and the front connection rod 32 to the side frame 22 is performed in the hollow portion 28 having a box-like high rigidity, the left and right sides by the rear connection rod 30 and the front connection rod 32 are left and right. The connection strength of the side frames 22 is increased, and the seat cushion portion 20 becomes highly rigid and strong under the effective use of the recessed portion 28.

  Next, a second embodiment of the vehicle seat according to the present invention will be described with reference to FIG. 4, parts corresponding to those in FIG. 2 are denoted by the same reference numerals as those in FIG. 2, and description thereof is omitted.

  In the second embodiment, the rear left and right active suspension devices 40 are arranged at positions corresponding to the hip point HP of the occupant seated, as viewed from the left and right directions. That is, the active suspension device 40 on the left and right upper rails 18 is disposed at a position directly below the hip point HP when viewed from the side projection surface. The hip point HP is one of the reference points of the positional relationship between the seat and the person known from ergonomics, and is a reference point in the front-rear direction corresponding to the position directly below the hip joint of the person seated on the seat.

  Since the hip point HP is the part that takes the most weight of the occupant seated on the seat cushion part 20, the active suspension device 40 is disposed at a position corresponding to the hip point HP in order to improve riding comfort. Furthermore, it is preferable for efficiently and effectively reducing vibration of the seat cushion portion 20 due to running vibration or the like.

  In the second embodiment, the front side of the side frame 22 is supported by a compression-type anti-vibration rubber device 110 provided between the upper rail 18 and the side frame 22 instead of the active suspension device 40. It has become.

  Next, a third embodiment of the vehicle seat according to the present invention will be described with reference to FIGS. 5, parts corresponding to those in FIG. 2 are denoted by the same reference numerals as those in FIG. 2, and description thereof is omitted.

  In the third embodiment, as shown in FIG. 5, a band-shaped active suspension device 120 that is long in the front-rear direction is provided between the upper rail 18 and the side frame 22. The active suspension device 120 extends continuously over substantially the entire area of the upper rail 18 in the front-rear direction.

  Details of the active suspension device 120 will be described with reference to FIGS. 6 and 7. The active suspension apparatus 120 includes a plurality of lower boss members 122 arranged at intervals in the front-rear direction, a rectangular lower housing 124 elongated in the front-rear direction, and a rectangular elongated in the front-rear direction that is caulked and coupled to the upper portion of the lower housing 124. And an upper housing 126 having a shape. The lower boss member 122 integrally has a mounting piece 122A protruding downward, and the mounting piece 122A is fixed to the upper rail 18 by bolts and nuts 128.

  Each lower boss member 122 is connected to the lower housing 124 by a vibration-proof elastic body 130 made of rubber or the like. The anti-vibration elastic body 130 is vulcanized and bonded to the left and right inner surfaces of the lower housing 124 and extends across the entire area in the front-rear direction of the lower housing 124, and the lower boss member 122. The left jumping beam portion 130C that is provided separately for connecting the lower boss member 122 and the left beam portion 130A, and the lower boss member 122 and the right beam portion 130B that are individually provided for each lower boss member 122. The right jumping beam portion 130D is integrally provided.

  A diaphragm 132 made of rubber or the like is vulcanized and bonded to the lower housing 124 over the entire outer peripheral edge. The diaphragm 132 is also vulcanized and bonded to the outer peripheral surface of the lower boss member 122 so that each lower boss member 122 is exposed to the outside. The diaphragm 132 cooperates with the lower housing 124 and a partition plate 136 to be described later. A built-in lower liquid chamber 134 is defined.

  The lower liquid chamber 134 is filled with a liquid such as oil having an appropriate viscosity together with an upper liquid chamber 142 described later.

  In this way, the liquid seal mount 138 is formed between the lower boss member 122 and the lower housing 124.

  Between the lower housing 124 and the upper housing 126, a partition plate 136 that divides the interior of these housings in the vertical direction is fastened together with the caulking portions of these housings.

  Exciting members 140 having a substantially disc shape are provided by elastic bodies 139 such as rubber at two locations in the front and rear in the upper housing 126. The elastic body 139 is vulcanized and bonded to the inner peripheral surface of the upper inner housing 46, and vulcanized and bonded to the outer peripheral surface of each vibrating member 140 so that each vibrating member 140 is exposed to the partition plate 136 side. The upper liquid chamber 142 is defined between the partition plate 136 and the upper liquid chamber 142. Communication holes 144 are formed at two locations on the front and rear sides of the partition plate 136. The communication hole 144 is provided at a position facing each vibration member 140. The upper liquid chamber 142 communicates with the lower liquid chamber 134 through the communication hole 144.

  The vibration member 140 is integrally formed with a stem 146 extending from the vibration member 140 to the side opposite to the upper liquid chamber 142, that is, the upper side. A movable core member 148 is fixed to the upper end of the stem 146. Yes. In the upper housing 126, a coil 150, a yoke member 152, and a fixed core member 154 facing the movable core member 148 are attached to each vibration member 140.

  Left and right attachment pieces 156 that extend over the entire length of the upper housing 126 in the front-rear direction are joined to the left and right sides of the upper housing 126. The mounting piece 156 fixes the upper housing 126 to the lower bottom portion of the side frame 22 with a plurality of bolts and nuts 158.

  Traveling vibrations and the like are input from the floor panel 10 to the lower boss member 122 of the active suspension device 120 via the mounting member 12, the lower rail 16, and the upper rail 18. When vibration is input to the lower boss member 122, the vibration-proof elastic body 130 forming the liquid seal mount 138 is elastically deformed by the vibration. The elastic deformation of the vibration-proof elastic body 130 mainly attenuates and absorbs low-frequency and small-amplitude vibrations, and suppresses transmission of low-frequency and small-amplitude vibrations to the side frame 22.

  When the coil 150 is energized and the coil 150 is excited, the movable core member 148 is moved upward by magnetic attraction by the fixed core member 154, and the vibration member 140 is lifted along with the elastic deformation of the elastic body 139. It moves and the volume of the upper liquid chamber 142 increases. As the volume of the upper liquid chamber 142 increases, the sealed liquid in the lower liquid chamber 134 flows into the upper liquid chamber 142 from the communication hole 144, and the volume of the lower liquid chamber 134 decreases. Is elastically deformed, and the lower housing 124 and the upper housing 126 move downward with respect to the lower boss member 42.

  When energization of the coil 150 is stopped and the coil 150 is demagnetized, the magnetic attraction by the fixed core member 154 is lost, and the movable core member 148 and the vibration member 140 are moved downward by the restoring force of the elastic body 139, so that the upper liquid chamber 142 The volume of is reduced. As the volume of the upper liquid chamber 142 decreases, the sealed liquid in the upper liquid chamber 142 flows into the lower liquid chamber 134 from the communication hole 144 and the volume of the lower liquid chamber 134 increases, so that the vibration isolating elastic body 50 is increased. Is elastically deformed, and the lower housing 124 and the upper housing 126 move upward relative to the lower boss member 122.

  Thereby, the energization to the coil 150 is controlled in synchronization with the input vibration from the floor panel 10, so that the lower boss member 122 fixed to the upper rail 18 and the upper housing 126 solidified to the side frame 22 are interposed. In addition, an anti-phase generator 160 that generates an anti-phase vibration from the input vibration from the floor panel 10 is configured. The anti-phase generator 160 is configured at four locations on the front and rear, right and left of the seat cushion portion 20 and generates vibrations (displacements) that cancel out input vibrations from the floor panel 10, thereby mainly absorbing large-amplitude vibrations. The vibration of the amplitude is prevented from being transmitted to the side frame 22.

  The energization control for the coil 150 synchronized with the input vibration from the floor panel 10 can be performed based on the vertical motion of the side frame 22 detected by an acceleration sensor (not shown) attached to the side frame 22. The control of the antiphase generation unit 160 may be the same control for all four units or may be individual control.

  Also in this embodiment, since the active suspension device 120 is provided between the upper rail 18 and the side frame 22, even if the position of the seat cushion portion 20 changes in the front-rear direction due to the sliding movement of the upper rail 18 with respect to the lower rail 16, the seat The positional relationship between the cushion portion 20 and the active suspension device 120 in the front-rear direction does not change. That is, since the active suspension apparatus 120 moves in the front-rear direction together with the seat cushion part 20, the positional relationship in the front-rear direction between the seat cushion part 20 and the active suspension apparatus 120 does not change.

  As a result, even if the position of the seat cushion portion 20 changes in the front-rear direction due to the front-rear adjustment of the seat cushion portion 20, the vibration reduction characteristic that the active suspension device 120 gives to the seat cushion portion 20 does not fluctuate, and stable vibration Reduction is performed.

  Although the present invention has been described above with reference to preferred embodiments thereof, the present invention is not limited to such embodiments and can be deviated from the spirit of the present invention, as will be readily understood by those skilled in the art. It is possible to change appropriately within the range not to be. For example, the antiphase generators 100 and 160 are not limited to electromagnetic types, and may be electrostrictive types or fluid pressure types. Further, the connection of the active suspension devices 40 and 120 to the side frame 22 may be performed by the lower housings 44 and 124 instead of the upper outer housing 48 and the upper housing 126.

  The vehicle seat according to the present invention is not limited to application to the seat cushion portion 20 that is movable in the front-rear direction, and the lower rail 16 and the upper rail 18 extend in the front-rear oblique direction so that the seat cushion portion 20 is front-rear. The present invention can also be applied to one that can move in an oblique direction, or one in which the lower rail 16 and the upper rail 18 extend in the left-right direction and the seat cushion portion 20 can move in the left-right direction. Further, in the vehicle seat according to the present invention, the lower rail 16 and the upper rail 18 extending in the front-rear direction and the lower rail 16 and the upper rail 18 extending in the left-right direction are provided in two upper and lower stages, and the seat cushion portion 20 is provided in the front-rear direction and The present invention can also be applied to one that can move in the left-right direction. In this case, the active suspension device 40 may be disposed on the upper rail 18 on the upper stage (seat cushion portion 20 side).

  In addition, all the components shown in the above embodiment are not necessarily essential, and can be appropriately selected without departing from the gist of the present invention. For example, the liquid seal mount unit 70 is not essential and may be omitted.

DESCRIPTION OF SYMBOLS 10 Floor panel 16 Lower rail 18 Upper rail 20 Seat cushion part 22 Side frame 24 Reclining apparatus 26 Back frame 28 Indentation part 30 Rear side connection rod 32 Front side connection rod 34 Front end connection member 40 Active suspension apparatus 42 Lower boss member 44 Lower housing 46 Upper inner side Housing 48 Upper outer housing 50 Anti-vibration elastic body 52 Connection member 54 Diaphragm 56 Partition plate 58 First liquid chamber 60 Second liquid chamber 70 Liquid seal mount portion 72 Elastic body 74 Excitation member 76 Third liquid chamber 78 Communication hole 82 Movable Core member 84 Coil 94 Fixed core member 100 Reverse phase generation unit 102 Acceleration sensor 110 Anti-vibration rubber device 120 Active suspension device 122 Lower boss member 124 Lower housing 126 Upper housing Zing 132 Diaphragm 134 Lower liquid chamber 136 Bulkhead plate 138 Liquid seal mount portion 139 Elastic body 140 Vibration member 142 Upper liquid chamber 144 Communication hole 148 Movable core member 150 Coil 154 Fixed core member 160 Reverse phase generation portion

Claims (8)

A vehicle seat having a lower rail fixed to a vehicle body and an upper rail movably engaged with the lower rail, wherein a side frame of a seat cushion portion is disposed on the upper rail,
An active suspension device is attached between the upper rail and the side frame ,
A vehicle seat in which a depression is formed in the side frame, and the active suspension device is provided in the depression .   The vehicle seat according to claim 1, wherein the lower rail extends in the front-rear direction and is provided in a pair of left and right, and the left and right upper rails engage with each of the lower rails and are movable in the front-rear direction.   The vehicle seat according to claim 1, wherein the active suspension device is individually provided at each of a front portion and a rear portion of the side frame. A back frame is attached to the rear part of the side frame so that the inclination angle with respect to the side frame can be changed by a reclining device,
The vehicle seat according to claim 1, wherein at least one of the active suspension devices is provided below the reclining device.   The vehicle seat according to claim 1, wherein at least one of the active suspension devices is provided at a position corresponding to a hip point of a seated occupant when viewed from the left-right direction. 6. The recess according to claim 1 , wherein the recess is formed with a downward open recess that is recessed inward from the outside of the lateral side surface of the side frame, and the active suspension device is provided in the recess . The vehicle seat according to any one of the above. A pair of left and right side frames are provided,
The vehicle seat according to claim 6 , further comprising a connecting rod that joins left and right end portions to a wall that defines the hollow portion and extends in the left-right direction to connect the left and right side frames to each other. The active suspension device includes a liquid ring mount unit that attenuates vibration, and an antiphase generator that is coupled to the liquid ring mount unit and generates a vibration having a phase opposite to that of an input vibration from a vehicle body. The vehicle seat according to any one of claims 1 to 7 , wherein a seal mount portion is directly connected to the upper rail, and the reverse phase generation portion is directly connected to the side frame.

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