JP2011219004A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat in which a plurality of mechanisms to be driven can be driven by a single motor installed in a seat cushion, and scale-up of the seat cushion and an increase in mass thereof can be prevented.SOLUTION: In this vehicle seat, a 1-motor power unit 48 is supported by a front frame 24 of a cushion frame 14. That means, since a skeleton member of the seat cushion 12 also functions as a supporting member of the 1-motor power unit 48, a configuration for supporting the 1-motor power unit 48 can be simplified. Thus, the increase in mass of the seat cushion 12 can be prevented. In addition, since the 1-motor power unit 48 is disposed on the front in the seat cushion 12, spaces on a center side or a rear side in the seat cushion 12 where a seat cushion pad etc. is disposed can be efficiently utilized to secure cushionability.

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat that drives a plurality of driven mechanisms provided in a seat body by a single motor.

  In the power seat drive device disclosed in Patent Document 1 below, a connecting plate is spanned between a pair of left and right upper rails that constitute a slide rail of the power seat. A clutch box and a motor are disposed on the connecting plate, and the driving force of the motor causes the seat to move forward and backward, raise and lower the seat, and raise and lower the seat.

Japanese Patent Application Laid-Open No. 64-30850

  However, in the power seat drive device having the above-described configuration, the large clutch box and the motor are arranged at a substantially central portion of the seat (seat cushion). In other words, since the clutch box and motor are arranged in the approximate center of the seat cushion where the cushion pad, cushion spring, etc. are arranged, in order to improve the cushioning property (sitting comfort) of the seat cushion, It may be necessary to increase the size.

  In addition, since the clutch box and the motor arranged in the substantially central portion of the seat cushion are supported by the seat via a large connecting plate, there is a problem that the mass of the seat is increased by the connecting plate. Further, since the motor locks when the forward / backward movement of the seat is restricted within the limit of the moving range, the above-described connecting plate is required to have a rigidity that can support an excessive lock load of the motor. In this respect, since the connecting plate described above is formed in a long shape in the left-right direction of the sheet, it is necessary to set a large plate thickness in order to improve rigidity, which also increases the mass of the sheet. End up.

  In consideration of the above-described facts, the present invention can drive a plurality of driven mechanisms by a single motor disposed in a seat cushion, and can avoid an increase in the size and an increase in mass of the seat cushion. The purpose is to obtain a sheet for use.

  In the vehicle seat according to the first aspect of the present invention, a plurality of driven mechanisms are provided, and the front portion of the cushion frame, which is a skeleton member of the seat cushion, is configured by a front frame along the seat width direction. A seat body, a plurality of rotating bodies and a single motor which are disposed on the front side in the seat cushion and supported by the front frame and individually correspond to the plurality of driven mechanisms; One motor power unit that transmits the rotational force of the motor to an arbitrarily selected rotating body among the plurality of rotating bodies and rotationally drives the selected rotating body, and the plurality of rotating bodies from the plurality of rotating bodies. And a plurality of driving force transmission mechanisms that individually transmit the driving force to the driving mechanism.

  In the vehicle seat according to the first aspect, the one motor power unit arranged on the front side in the seat cushion has a plurality of rotating bodies and a single motor. The rotational force of the motor is transmitted to an arbitrarily selected rotating body among the plurality of rotating bodies, and the selected rotating body is rotationally driven. The driving force of the rotating body is transmitted to one of the plurality of driven mechanisms of the seat body via one driving force transmission mechanism of the plurality of driving force transmission mechanisms.

  Here, in this vehicle seat, the front part of the cushion frame, which is a skeleton member of the seat cushion, is constituted by a front frame along the seat width direction, and the above-mentioned one motor power unit is supported by this front frame. ing. That is, since the skeleton member of the seat cushion also functions as a support member for the single motor power unit, the configuration for supporting the single motor power unit can be simplified. Thereby, it can avoid that the mass of a seat cushion increases.

  Moreover, since the 1 motor power unit is supported by the front frame and disposed on the front side in the seat cushion, the space on the center side and the rear side in the seat cushion where the seat cushion pad and the like are disposed is cushioned. It can be used effectively for securing. Thereby, it can avoid that a seat cushion enlarges in order to ensure cushioning properties.

  A vehicle seat according to a second aspect of the present invention is the vehicle seat according to the first aspect, wherein the plurality of rotating bodies are arranged coaxially in the seat width direction. .

  In the vehicle seat according to claim 2, the one motor power unit disposed on the front side in the seat cushion includes a plurality of rotating bodies arranged coaxially in the seat width direction. Thereby, since the dimension of the 1-motor power unit in the seat front-rear direction can be set small, the 1-motor power unit can be arranged compactly on the front side in the seat cushion.

  The vehicle seat according to a third aspect of the present invention is the vehicle seat according to the first or second aspect, wherein the one motor power unit is suspended from the front frame via a support bracket. It is characterized by being supported by.

  In the vehicle seat according to the third aspect, the one motor power unit is supported while being suspended from the front frame of the cushion frame via the support bracket. Thereby, it can avoid that the space above a front frame is eroded by the arrangement space of 1 motor power unit.

  In addition, a tensile load mainly due to the mass of one motor power unit acts on the support bracket, and bending rigidity is not required so much, so that it is possible to avoid an increase in the mass of the support bracket to ensure the bending rigidity of the support bracket. .

  A vehicle seat according to a fourth aspect of the present invention is the vehicle seat according to the third aspect, wherein the cushion frame includes an auxiliary frame disposed along the seat width direction on the rear side of the front frame. The support bracket has a front end side supported by the front frame and a rear end side supported by the auxiliary frame.

  In the vehicle seat according to claim 4, the support bracket of the one motor power unit has the front end side supported by the front frame of the cushion frame and the rear end side arranged along the seat width direction on the rear side of the front frame. Supported by an auxiliary frame. That is, since the front and rear ends of the support bracket are supported by the constituent members of the cushion frame, the load burden on the front frame and the auxiliary frame is halved. Thereby, the support rigidity of 1 motor power unit to the cushion frame via a support bracket can be ensured satisfactorily.

  According to a fifth aspect of the present invention, there is provided the vehicle seat according to the fourth aspect, wherein the support bracket includes a hook portion that is hooked on one of the front frame and the auxiliary frame. A locking portion locked to one of the front frame and the auxiliary frame by a locking means, and the hooking portion from the one when the locking portion is locked to the other It is characterized by being prevented from leaving.

  In the vehicle seat according to claim 5, when the support bracket supporting the one motor power unit is attached to the cushion frame, the hook portion provided on the support bracket is hooked on one of the front frame and the auxiliary frame. Thereafter, the locking portion provided on the support bracket is locked to either the front frame or the auxiliary frame by the locking means. As a result, the detachment of the hook portion from the one side is prevented, and the support bracket is attached to the seat cushion, so that one motor power unit can be easily attached to the cushion frame.

  A vehicle seat according to a sixth aspect of the present invention is the vehicle seat according to any one of the first to fifth aspects, wherein the support bracket is in a state where the plate thickness direction is along the seat width direction. It has a plurality of plates arranged in the sheet width direction, and the one motor power unit is assembled to the support bracket in a state of passing through the plurality of plates.

  In the vehicle seat according to claim 6, the plurality of plates constituting the support bracket are arranged side by side in the seat width direction with the plate thickness direction aligned with the seat width direction. It is assembled to the support bracket in a state of passing through the plate. As a result, the one motor power unit can be supported on the front frame along the seat width direction by the support bracket having a simple and lightweight configuration.

  A vehicle seat according to a seventh aspect of the present invention is the vehicle seat according to any one of the first to sixth aspects, wherein one of the left and right side portions of the seat cushion is operated. When a member is provided and an operating force when the operated member is operated is transmitted to the one motor power unit, a rotating body to which the rotating force of the motor is transmitted is selected from the plurality of rotating bodies. In addition, the one motor power unit is arranged on the side where the operated member is provided in the sheet width direction.

  In the vehicle seat according to the seventh aspect, when the operated member provided on one of the left and right side portions of the seat cushion is operated, the operating force is transmitted to the one motor power unit. Thereby, the rotating body to which the rotational force of the motor is transmitted is selected from among the plurality of rotating bodies. Here, in this invention, one motor power unit is arrange | positioned in the sheet | seat width direction in the side provided with the to-be-operated member. Thereby, the structure for transmitting the operating force from the operated member to one motor power unit can be reduced in size.

  As described above, in the vehicle seat according to the present invention, a plurality of driven mechanisms can be driven by a single motor arranged in the seat cushion, and the seat cushion can be increased in size and mass. It can be avoided.

It is a perspective view which shows the structure of the principal part of the vehicle seat which concerns on embodiment of this invention. It is a perspective view of the state which omitted the cushion front frame in FIG. FIG. 3 is a perspective view showing the vehicle seat shown in FIG. 2 as seen from an angle different from that in FIG. 2. It is a perspective view which shows 1 motor power unit and a support bracket which are the structural members of the vehicle seat which concerns on embodiment of this invention. FIG. 5 is a perspective view showing the one motor power unit and the support bracket shown in FIG. 4 as viewed from an angle different from that in FIG. 4. It is a perspective view which shows the partial structure of the cushion frame of the vehicle seat which concerns on embodiment of this invention. It is a perspective view for demonstrating the condition at the time of hooking the hook part of a support bracket on a front part frame. It is a perspective view for demonstrating the condition at the time of latching the latching | locking part of a support bracket to an auxiliary | assistant frame. It is a perspective view which shows 1 motor power unit supported by the front frame and the auxiliary | assistant frame via the support bracket. FIG. 6 is a perspective view of a clutch mechanism that is a constituent member of one motor power unit shown in FIGS. 4 and 5. It is a disassembled perspective view which shows the partial structure of the clutch mechanism which is a structural member of 1 motor power unit shown by FIG.4 and FIG.5. It is a figure for demonstrating the operation method of the switch unit provided in the vehicle seat which concerns on embodiment of this invention, (A) is slide operation, (B) is front tilt operation, (C) is lift operation, (D) is a diagram corresponding to a recliner operation, and (E) is a diagram corresponding to a lumbar operation. It is a perspective view which shows the structure of the sliding drive force transmission mechanism provided in the vehicle seat which concerns on embodiment of this invention. It is a perspective view which shows the speed-up gear train which is a structural member of the sliding drive force transmission mechanism shown by FIG. The structure of the outer side gearbox which is a structural member of the sliding drive force transmission mechanism shown in FIG. 13 is shown, (A) is a perspective view seen from the left side of the seat, and (B) is a perspective view seen from the right side of the seat. It is. The structure of the inner side gearbox which is a structural member of the sliding drive force transmission mechanism shown in FIG. 13 is shown, (A) is a perspective view seen from the right side of the seat, and (B) is a perspective view seen from the left side of the seat. It is. FIG. 3 is a perspective view illustrating a configuration of a front tilt driving force transmission mechanism provided in the vehicle seat according to the embodiment of the present invention. FIG. 18A is a perspective view illustrating a configuration of a front tilt gear box that is a constituent member of the front tilt driving force transmission mechanism illustrated in FIG. 17, and FIG. 18B illustrates the front tilt gear box illustrated in FIG. It is a perspective view which shows the structure of the screw gearwheel which is a structural member, and a screw. It is a perspective view which shows the structure of the drive force transmission mechanism for lifters provided in the vehicle seat which concerns on embodiment of this invention. (A) is a perspective view showing a configuration of a lifter gear box which is a constituent member of the lifter driving force transmission mechanism shown in FIG. 19, and (B) is a constituent member of the lifter gear box shown in (A). It is a perspective view which shows the structure of a certain screw gear and a screw. FIG. 3 is a perspective view showing a configuration of a lumbar driving force transmission mechanism provided in the vehicle seat according to the embodiment of the present invention. It is a perspective view which shows the structure of the principal part of the driving force transmission mechanism for lumbars shown by FIG. It is a perspective view which shows the structure of the recliner driving force transmission mechanism provided in the vehicle seat which concerns on embodiment of this invention. It is a disassembled perspective view which shows the structure of the front side gear box which is a structural member of the drive force transmission mechanism for recliners shown by FIG. FIG. 24 is an exploded perspective view showing a configuration of peripheral members including a rear gear box and a speed increasing gear train, which are components of the recliner driving force transmission mechanism shown in FIG. 23.

  Hereinafter, with reference to FIGS. 1-25, the vehicle seat 10 which concerns on embodiment of this invention is demonstrated. In the figure, the arrow FR indicates the front direction of the seat, the arrow UP indicates the upward direction of the seat, the arrow LH indicates the left direction of the seat, and the arrow RH indicates the right direction of the seat. Further, in the vehicle seat 10, the seat width direction and the seat left-right direction coincide with each other.

  As shown in FIGS. 1 to 3, the vehicle seat 10 includes a seat cushion 12 and a seat back 16 that constitute a seat body. The seat cushion 12 has a cushion frame 14 that is a skeleton member, and the seat back 16 has a back frame 18 that is a skeleton member.

  The cushion frame 14 includes a pair of left and right side frames 20, 22 extending in the front-rear direction of the seat, a front frame 24 (see FIGS. 2 and 3) that connects the front portions of the pair of side frames 20, 22, and a pair of side frames. A rear frame 26 that connects the rear portions of the side frames 20 and 22, and an auxiliary frame 27 that is disposed on the seat rear side of the front frame 24 and connects the front and rear intermediate portions of the pair of side frames 20 and 22. It consists of

  The front frame 24, the rear frame 26, and the auxiliary frame 27 are all formed of a pipe material made of a metal material or the like, and are arranged in a state where the axial direction is along the sheet width direction. The auxiliary frame 27 is formed with a smaller diameter than the front frame 24, and is disposed below the front frame 24 on the front side of the seat with respect to the center portion in the front-rear direction of the cushion frame 14.

  On the other hand, the back frame 18 includes a pair of left and right side frames 28 and 30 extending in the vertical direction of the seat, a lower frame 32 connecting lower portions of the pair of side frames 28 and 30, and upper portions of the pair of side frames 28 and 30. And an upper frame 34 for connecting the two.

  A cushion spring 35 is attached to the cushion frame 14, and a seat cushion pad (not shown) covered with an outer skin is attached to the upper side of the cushion spring 35. A back spring 37 is attached to the back frame 18, and a seat back pad (not shown) covered with a skin is attached to the front side of the back spring 37.

  The vehicle seat 10 is provided with a slide mechanism 36, a front tilt mechanism 38, a lifter mechanism 40, a lumbar mechanism 42, and a recliner mechanism 46 (all driven mechanisms). These driven mechanisms are configured to be driven by one motor power unit 48 shown in FIGS. 4 and 5, and a sliding driving force is transmitted between the one motor power unit 48 and each of the driven mechanisms. Mechanism 50 (see FIG. 13), front tilt driving force transmission mechanism 52 (see FIG. 17), lifter driving force transmission mechanism 54 (see FIG. 19), lumbar driving force transmission mechanism 56 (see FIG. 21), and recliner A driving force transmission mechanism 58 (see FIG. 23) is disposed. First, the 1 motor power unit 48 will be described.

(Configuration of one motor power unit 48)
As shown in FIGS. 4 and 5, the one motor power unit 48 is a unit in which a single motor 60 having a reduction gear 59 and a clutch mechanism 62 are unitized. The clutch mechanism 62 is formed in a columnar shape as a whole, and is arranged in a state where the axial direction is along the sheet width direction. Further, the motor 60 is arranged on one end side (left side of the seat) in the axial direction of the clutch mechanism 62, and an output shaft (not shown) provided in the speed reducer 59 is arranged coaxially with the clutch mechanism 62.

  The one motor power unit 48 described above is supported by the front frame 24 and the auxiliary frame 27 (see FIGS. 2 and 3) of the cushion frame 14 via the support bracket 64. The support bracket 64 includes a plurality of plates 65A, 65B, 65C, 65D, 65E, 65F, and 65G formed of a sheet metal material or the like. These plates 65 </ b> A to 65 </ b> G are arranged side by side in the sheet width direction with the plate thickness direction of the main portion being along the sheet width direction, and are connected in the sheet width direction by long nuts 67, screws 69, and the like. Each of the plates 65A to 65G has a circular through hole coaxially formed, and the clutch mechanism 62 is assembled to the plates 65A to 65G in a state of passing through the through holes.

  The two plates 65F and 65G arranged on the left end side of the plates 65A to 65G are fastened with the front side and the front-rear direction intermediate part partially overlapped in the plate thickness direction. Further, the plate 65G disposed at the leftmost end is bent in a crank shape at the rear side and is separated from the plate 65F. A plate 65H formed of a sheet metal material or the like is fastened to the upper part of the front portion of the second plate 65F from the left. The plate 65H protrudes toward the left side of the seat.

  Further, a motor 60 is disposed on the side opposite to the clutch mechanism 62 via a plate 65G disposed at the leftmost end. The motor 60 is fastened to the plates 65F and 65G by screws 71 and 73 (see FIG. 5) penetrating through the overlapping portions of the plates 65F and 65G being screwed into the housing of the speed reducer 59.

  A hooking portion 75 is provided on each of the upper end side of the front end portions of the plates 65A to 65G and the left end side of the plate 65H. Each hook portion 75 is formed with a substantially semicircular cutout 77 that opens toward the front side of the seat. These notches 77 (hook portions 75) correspond to circumferential grooves 79 (see FIGS. 6 and 7) formed in the front frame 24 of the cushion frame 14.

  On the other hand, the rear end sides of the plates 65A to 65G are formed so that the vertical dimension becomes smaller toward the seat rear side. Locking portions 81 are provided at the respective rear end portions of the plates 65A to 65G. As shown in FIGS. 4 and 5, the third plate 65E from the left is provided with an extension portion 65E1 extending to the rear side of the seat from the locking portion 81. The extension portion 65E1 corresponds to a lumbar driving force transmission mechanism 56 described later. Each locking portion 81 of the plates 65A to 65G is formed with a substantially semicircular cutout 83 that opens toward the upper side of the seat. These notches 83 (locking portions 81) correspond to circumferential grooves 85 (see FIG. 6) formed in the auxiliary frame 27 of the cushion frame 14.

  Further, as shown in FIG. 8 (A), a rotation plate 87 (locking tool) constituting locking means is attached to each locking portion 81 of the plates 65A to 65G. Each rotation plate 87 is rotatably connected to the plates 65 </ b> A to 65 </ b> G by a pin 89 at one end side disposed on the front side of the seat with respect to the notch 83. A circular hole 91 is formed on the other end side of the rotating plate 87. The circular hole 91 corresponds to a circular hole 93 formed in the plates 65 </ b> A to 65 </ b> G on the rear side of the sheet from the notch 83.

  Here, when the support bracket 64 having the above configuration is attached to the cushion frame 14, first, as shown in FIG. 7, the hook portions 75 of the plates 65 </ b> A to 65 </ b> H are fitted into the circumferential grooves 79 of the front frame 24. In this state, the front frame 24 is fitted inside the notch 77. Thereby, the front end sides of the plates 65 </ b> A to 65 </ b> H are hooked on the front frame 24.

  Next, as shown in FIG. 8A, when the locking portion 81 of the plates 65 </ b> A to 65 </ b> G is pushed up from the lower side of the auxiliary frame 27 to the auxiliary frame 27 side, the state is fitted into the circumferential groove 85 of the auxiliary frame 27. Thus, the auxiliary frame 27 is fitted inside the notch 83. Thereafter, the rotation plate 87 is rotated to a position where the circular holes 91 and 93 are opposed to each other (position shown in FIG. 8B), and the pin 97 is inserted into the circular holes 91 and 93, and the tip of the pin 97 A clip 99 for retaining is attached to the side. As a result, as shown in FIG. 8C, the rotation of the rotation plate 87 relative to the plates 65A to 65G is performed with the auxiliary frame 27 sandwiched between the plates 65A to 65G and the rotation plate 87. Be regulated.

  In this state, the locking portion 81 of the plates 65A to 65G is locked to the auxiliary frame 27 and the relative movement of the 65A to 65H to the rear side of the seat with respect to the auxiliary frame 27 is restricted, whereby the front frame 24 Detachment of each hooking part 75 from is prevented. As a result, as shown in FIG. 9, the support bracket 64 is attached to the cushion frame 14, and the one motor power unit 48 is supported in a suspended state on the front frame 24 and the auxiliary frame 27 (only) via the support bracket 64. It is configured to be.

  In this state, as shown in FIG. 1, the one-motor power unit 48 is disposed below the cushion front frame 186 constituting the front tilt mechanism 38. A cushion pad covered with a skin (not shown) is attached to the upper portion of the cushion front frame 186. That is, the one motor power unit 48 disposed below the cushion front frame 186 is configured not to affect the cushioning properties of the seat cushion 12.

  In the present embodiment, as shown in FIGS. 2 and 3, the one motor power unit 48 is arranged to be shifted to the right side of the seat with respect to the seat width direction center of the cushion frame 14, and the axis of the clutch mechanism 62 A motor 60 provided on one end side (left side) in the direction is disposed near the center of the cushion frame 14 in the seat width direction.

  Next, the clutch mechanism 62 will be described in detail. As shown in FIG. 10, the clutch mechanism 62 is formed in a columnar shape as a whole, and is arranged in a state where the axial direction is along the sheet width direction, and a plurality (three in this case) arranged side by side in the sheet width direction. ) Clutch units 66, 68 and 70, and a movable shaft 72 (see FIG. 11, not shown in FIG. 10). The movable shaft 72 is disposed at the axial center of the clutch mechanism 62 in a state where the axial direction is along the seat width direction, and is urged to the right side of the seat (the cam 116 side described later) by the spring 73. The movable shaft 72 is provided with three reduced-diameter portions 72A, 72B, 72C obtained by reducing the outer diameter of the movable shaft 72. These reduced diameter portions 72A, 72B, 72C are arranged at substantially equal intervals in the axial direction of the movable shaft 72.

  On the other hand, the clutch units 66, 68 and 70 have basically the same configuration, but here, the clutch unit 68 disposed at the center will be described first. As shown in FIG. 11, the clutch unit 68 includes a pair of input shafts 74 and 76 that are arranged side by side in the sheet width direction with the axial direction being along the sheet width direction. These input shafts 74 and 76 are formed in a substantially cylindrical shape, and are rotatably supported by the plates 65C and 65D of the support bracket 64 described above. Inside the input shafts 74 and 76, the above-described movable shaft 72 penetrates so as to be relatively movable along the axial direction.

  Between the input shafts 74 and 76, a pair of annular brackets 78 and 80 and a plurality (three in this case) of pins 82 are arranged. The annular brackets 78 and 80 are formed in a substantially disk shape, and are disposed so as to be back-to-back with each other in a state where the axial direction is along the sheet width direction. Each of the annular brackets 78 and 80 has a circular through hole formed in the axial center thereof, and the movable shaft 72 passes through these through holes concentrically.

  Further, the three pins 82 are arranged at equal intervals in the circumferential direction of the movable shaft 72 with the axial direction along the seat width direction, and the central portions in the axial direction are formed in the annular brackets 78 and 80. It is fitted in the through hole. One end in the axial direction of the three pins 82 is fitted into a circular hole (not shown) formed in the end face of one input shaft 74, and the other end in the axial direction of the three pins 82 is the other input shaft 76. Is fitted in a circular hole (not shown) formed on the end face of the. Thereby, the input shafts 74 and 76 are connected through the three pins 82 so as not to be relatively rotatable, and the annular brackets 78 and 80 are supported by the input shafts 74 and 76 through the three pins 82.

  Further, a lifter drive gear 84 (rotary body) is attached to one input shaft 74. The lifter drive gear 84 is formed in a cylindrical shape, and is arranged in a state where the axial direction is along the sheet width direction, and a part of the input shaft 74 is fitted inside the one axial side. Thereby, the lifter drive gear 84 is rotatably supported by the input shaft 74. External teeth are formed on the outer peripheral portion on one side in the axial direction of the lifter drive gear 84, and internal teeth are formed on the inner peripheral portion on the other side in the axial direction of the lifter drive gear 84.

  A front tilt drive gear 86 (rotary body) is attached to the other input shaft 76. The front tilt drive gear 86 is formed in a cylindrical shape similar to the lifter drive gear 84, and is disposed in a state where the axial direction is along the sheet width direction. However, the front tilt drive gear 86 is arranged in a direction opposite to the lifter drive gear 84 (in a back-to-back state). A part of the input shaft 76 is fitted on the inner side of the front tilt drive gear 86 in the axial direction, whereby the front tilt drive gear 86 is rotatably supported by the input shaft 76. External teeth are formed on the outer peripheral portion on one side in the axial direction of the front tilt drive gear 86, and internal teeth are formed on the inner peripheral portion on the other side in the axial direction of the front tilt drive gear 86.

  A pair of pawls 88 are disposed inside the lifter drive gear 84. These pawls 88 are rotatably attached to one end side in the axial direction of two pins 82 among the three pins 82 described above. A pair of pawls 90 are arranged inside the front tilt drive gear 86. These pawls 90 are rotatably attached to the other axial end of the two pins 82 described above. These pawls 88 and 90 are urged to one side around the axis of the pin 82 by a torsion coil spring 92, and one end part thereof is in contact with the outer peripheral part of the movable shaft 72 by the contact urging force.

  Here, when the movable shaft 72 is moved in the axial direction so that one end portion of the pawl 88 faces the reduced diameter portion 72B of the movable shaft 72, the pawl 88 rotates around the pin 82 by the biasing force of the torsion coil spring 92. The other end side of the pawl 88 is engaged with the inner teeth of the lifter drive gear 84. When the input shaft 74 rotates in this state, the rotational force of the input shaft 74 is transmitted to the lifter drive gear 84 via the pin 82 and the pawl 88.

  Further, when the movable shaft 72 moves in the axial direction so that one end portion of the pawl 90 faces the reduced diameter portion 72B of the movable shaft 72, the pawl 90 rotates around the pin 82 by the biasing force of the torsion coil spring 92, The other end of the pawl 90 meshes with the inner teeth of the front tilt drive gear 86. When the input shaft 76 rotates in this state, the rotational force of the input shaft 76 is transmitted to the front tilt drive gear 86 via the pin 82 and the pawl 90.

  The clutch unit 68 configured as described above is disposed between the clutch units 66 and 70 as shown in FIG. The clutch unit 66 arranged on the right side of the clutch unit 68 has basically the same configuration as the clutch unit 68, but includes a slide drive gear 94 (rotary body) instead of the lifter drive gear 84. Instead of the front tilt drive gear 86, a recliner drive gear 96 (rotating body) is provided.

  On the other hand, the clutch unit 70 disposed on the left side of the clutch unit 68 has basically the same configuration as the clutch unit 68, but includes a lumbar drive gear 98 (rotary body) instead of the lifter drive gear 84. A cover 100 is attached instead of the front tilt drive gear 86 (one gear is omitted). A gear similar to the front tilt drive gear 86 can be added in place of the cover 100. In this embodiment, the slide drive gear 94, the recliner drive gear 96, the lifter drive gear 84, the front tilt drive gear 86, and the lumbar drive gear 98 are arranged coaxially in the seat width direction.

  In the clutch units 66, 68, 70, input shafts (input shafts basically configured in the same manner as the input shafts 74, 76) arranged inside the drive gears are connected to each other so as not to rotate relative to each other. The motor 60 is connected to the output shaft of the motor 60 via a cylindrical motor connecting member 102. Accordingly, the rotational force of the motor 60 is transmitted to the input shafts, and the transmission path of the rotational force between the drive gears and the motor 60 is switched by the movement of the movable shaft 72 in the axial direction. Yes.

  Specifically, when the movable shaft 72 is moved in the axial direction and the reduced diameter portion 72B corresponding to the clutch unit 68 is opposed to the pawl 88 disposed inside the lifter drive gear 84, the contact pawl 88 is lifted. The drive gear 84 meshes with the inner teeth, and the rotational force of the motor 60 is transmitted to the lifter drive gear 84. When the reduced diameter portion 72B faces the pawl 90 disposed inside the front tilt drive gear 86, the contact pawl 90 is engaged with the inner teeth of the front tilt drive gear 86, and the rotational force of the motor 60 is increased by the front tilt. It is transmitted to the drive gear 86.

  Similarly, when the reduced diameter portion 72A corresponding to the clutch unit 66 faces a pawl (not shown) disposed inside the slide drive gear 94, the contact pawl is engaged with an internal tooth (not shown) of the slide drive gear 94, and the motor 60 Is transmitted to the slide drive gear 94. When the reduced diameter portion 72A faces a pawl (not shown) arranged inside the recliner drive gear 96, the contact pawl is engaged with an internal tooth (not shown) of the recliner drive gear 96, and the rotational force of the motor 60 is driven by the recliner drive. It is transmitted to the gear 96. Further, when the reduced diameter portion 72C of the movable shaft 72 corresponding to the clutch unit 70 faces a pawl (not shown) disposed inside the lumbar drive gear 98, the contact pawl is engaged with the inner teeth of the lumbar drive gear 98, and the motor The rotational force of 60 is transmitted to the lumbar drive gear 98.

  The above-described movable shaft 72 is configured to be moved in the axial direction by the switch unit 104 (see FIGS. 1 to 3) attached to the side frame 22 on the right side (outer side) of the cushion frame 14. The switch unit 104 includes a switch knob 106 attached to the side frame 22. The switch knob 106 includes a rotation knob 108 that is rotatable about an axis along the sheet width direction.

  The rotation of the rotary knob 108 is transmitted to the cam 116 via the gear train 112, and the cam 116 is rotated about the axis along the sheet width direction. The cam 116 is provided with an inclined surface (not shown) on the left side of the seat (1 motor power unit 48 side), and a small diameter portion 72D provided coaxially on one end side in the axial direction of the movable shaft 72 on the inclined surface. The tip of (see FIGS. 4, 5 and 11) is in contact. Therefore, when the cam 116 is rotated around the axis, the inclined surface is brought into sliding contact with the tip of the small diameter portion 72D, so that the movable shaft 72 is moved in the axial direction. As a result, the seated occupant can manually move the rotary knob 108 to move the movable shaft 72 in the axial direction by the operation force, so that the seat 60 can move between the drive gears of the clutch mechanism 62 and the motor 60. The transmission path of the rotational force can be selectively switched.

  Specifically, in a state where the rotation knob 108 is disposed at the position shown in FIG. 12A, it becomes possible to transmit the rotational force between the slide drive gear 94 and the motor 60, and FIG. In the state where the rotary knob 108 is disposed at the position shown in FIG. 12, the rotational force can be transmitted between the front tilt drive gear 86 and the motor 60, and the rotary knob 108 is placed at the position shown in FIG. In the disposed state, the rotational force can be transmitted between the lifter drive gear 84 and the motor 60, and in the state where the rotation knob 108 is disposed at the position shown in FIG. 12D, the recliner drive gear 96 is provided. Between the lumbar drive gear 98 and the motor 60 in a state where the rotary knob 108 is disposed at the position shown in FIG. Communication is possible.

  Further, as shown in FIGS. 1 and 2, a translation knob 110 is slidably attached to the rotary knob 108 described above. The translation knob 110 is connected to a switch (not shown), and the switch is electrically connected to the motor 60. Thus, when the translation knob 110 is slid to one side with respect to the rotation knob 108, the motor 60 rotates in the forward direction, and when the translation knob 110 is slid to the other side with respect to the rotation knob 108, the motor 60 is reversed. It has become.

  Next, the slide driving force transmission mechanism 50 that transmits the driving force from the above-described one motor power unit 48 to the slide mechanism 36 will be described.

(Configuration of slide driving force transmission mechanism 50)
As shown in FIG. 13, the slide mechanism 36 to which the slide driving force transmission mechanism 50 transmits the driving force includes a slide rail 120. The slide rail 120 is slidably attached to the pair of left and right lower frames 122 and 124 fixed to the vehicle body floor, and to the lower frames 122 and 124, and the side frames 20 and 22 of the cushion frame 14 (FIG. 13). The vehicle seat 10 is slidable in the longitudinal direction of the vehicle with respect to the vehicle body floor portion.

  A link member 129 is disposed between the right upper frame 128 and the clutch mechanism 62. A front end side (lower end side) of the link member 129 is rotatably connected to a front end side of the upper frame 128 via an outer side gear box 144 described later. As shown in FIG. 14, a circular hole 131 is formed on the rear end side (upper end side) of the link member 129. The circular hole 131 has an axial end portion (right end) of the clutch mechanism 62 described above. 62 </ b> A (see FIG. 13) is fitted. Thus, the rear end side of the link member 129 and the clutch mechanism 62 are coupled so as to be rotatable about the axis of the clutch mechanism 62 (about the axis along the sheet width direction).

  A shaft 130 is attached to the rear end side of the link member 129 on the front end side of the circular hole 131. The shaft 130 is arranged in a state where the axial direction is along the sheet width direction, and protrudes inward in the sheet width direction from the link member 129. One end of the shaft 130 in the axial direction is supported so as to be rotatable with respect to the link member 129, and a gear 132 is fixed to the other end of the shaft 130 in the axial direction. The gear 132 is meshed with the external teeth of the slide drive gear 94 described above. For this reason, when the slide drive gear 94 rotates, the gear 132 rotates integrally with the shaft 130 around the axis.

  One end in the axial direction of the shaft 130 protrudes to the opposite side of the clutch mechanism 62 via the link member 129, and a gear 136 constituting the speed increasing gear train 134 shown in FIG. It is fixed. The speed increasing gear train 134 speeds up the rotation of the gear 136 and transmits it to the gear 138 disposed at the front end of the link member 129. This gear 138 corresponds to the transmission gear train 142 shown in FIG. The speed increasing gear train 134 is covered with a cover 140 (see FIG. 14) attached to the link member 129.

  The transmission gear train 142 is attached to an outer gear box 144 attached to the front end portion of the upper frame 128, and includes a gear 146 that rotates coaxially and integrally with the gear 138 of the speed increasing gear train 134. . The rotation of the gear 146 is transmitted to a gear 148 that is provided at the upper end portion of the outer side gear box 144 and forms the transmission gear train 142. A screw gear 150 (see FIG. 15B) is coaxially arranged on the outer side of the gear 148 in the sheet width direction, and the gear 148 and the screw gear 150 rotate integrally.

  Another screw gear 152 meshed with the screw gear 150 is arranged below the screw gear 150. The screw gear 152 is fixed to the front end portion of the outer screw 154. The outer-side screw 154 is a long bar-like member having a male screw formed on the outer peripheral portion, and is arranged on the upper side of the upper frame 128 with the axial direction along the front-rear direction of the seat as shown in FIG. The front end portion of the outer side screw 154 is rotatably supported by the outer side gear box 144, and the rear end portion of the outer side screw 154 is rotatable by a support member 156 attached to the rear end portion of the upper frame 128. It is supported by. Further, an outer side nut 158 formed in a substantially block shape is screwed into an intermediate portion of the outer side screw 154, and the outer side nut 158 is fixed to the lower frame 124 via a bracket 160.

  On the other hand, one end of the torque cable 164 shown in FIG. 13 is connected to the gear 146 of the transmission gear train 142 described above. The torque cable 164 is arranged with the axial direction along the seat width direction, and the other axial end is inserted into an inner gear box 166 attached to the front end of the inner upper frame 126. Yes. In this inner gear box 166, a transmission gear train 168 is arranged as shown in FIG. 16A, and the gear 170 constituting the transmission gear train 168 is arranged at one end in the axial direction of the torque cable 164. It is connected. Thereby, the rotation of the gear 146 is transmitted to the gear 170 via the torque cable 164. The rotation of the gear 170 is transmitted to a gear 172 provided at the upper end of the inner gear box 166. A screw gear 174 is coaxially arranged on the outer side of the gear 172 in the sheet width direction, and the gear 172 and the screw gear 174 rotate integrally.

  Another screw gear 176 meshed with the screw gear 174 is disposed below the screw gear 174. The screw gear 176 is fixed to the front end portion of the inner side screw 178. The inner side screw 178 is a member similar to the outer side screw 154, a front end portion is rotatably supported by the inner side gear box 166, and a rear end portion is a support member 180 attached to the rear end portion of the upper frame 126. Is rotatably supported. Further, an inner side nut 182 formed in a substantially block shape is screwed into an intermediate portion of the outer side screw 154, and the inner side nut 182 is fixed to the lower frame 122 via a bracket 184.

  Here, when the translation knob 110 is slid in a state where the rotation knob 108 is disposed at the position shown in FIG. 12A, the rotational force of the motor 60 is transmitted to the slide drive gear 94, and the slide drive is performed. The gear 94 rotates. The rotation of the slide drive gear 94 is transmitted to the outer screw 154 via the gear 132, the shaft 130, the speed increasing gear train 134, the transmission gear train 142, and the screw gears 150 and 152, and the torque cable 164 is transmitted. It is transmitted to the inner screw 178 via the gear train 168 and screw gears 174 and 176. Thus, when the outer side screw 154 and the inner side screw 178 rotate about the axis, the outer side nut 158 moves relative to the outer side screw 154 in the axial direction, and the inner side nut 182 moves relative to the inner side screw 178. Move relative to the axis. As a result, the upper rail 128 is slid with respect to the lower rail 124 to which the outer side nut 158 is fixed, and the upper rail 126 is slid with respect to the lower rail 122 to which the inner side nut 182 is fixed. Slide back and forth with respect to the part.

  In this case, when the translation knob 110 is operated in the arrow FORWARD direction of FIG. 12A, the vehicle seat 10 is slid to the front side of the vehicle, and the translation knob 110 is operated in the arrow BACK direction of FIG. Then, the vehicle seat 10 is slid to the vehicle rear side.

  Next, the front tilt driving force transmission mechanism 52 that transmits the driving force from the one motor power unit 48 to the front tilt mechanism 38 will be described.

(Configuration of Front Tilt Driving Force Transmission Mechanism 52)
As shown in FIG. 17, the front tilt mechanism 38 to which the front tilt driving force transmission mechanism 52 transmits the driving force is a plate-like cushion front frame 186 (between the front portions of the side frames 20 and 22). 1). Connecting members 188 and 190 are fixed to the left and right sides of the rear end side of the cushion front frame 186, and these connecting members 188 and 190 are rotatably connected to the side frames 20 and 22 via pins 192. Has been.

  A front tilt gear box 194 constituting the front tilt driving force transmission mechanism 52 is disposed below the cushion front frame 186 and on the front side of the clutch mechanism 62 in the seat. The front tilt gearbox 194 is sandwiched between the plates 65B and 65C shown in FIGS. 4 and 5 and fastened to both. As shown in FIG. 17, a pair of gears 196 and 198 arranged in the front-rear direction of the seat are arranged in mesh with each other on the inner side in the seat width direction of the front tilt gear box 194. These gears 196 and 198 are rotatably supported by the front tilt gear box 194 in a state where the axial direction is along the sheet width direction.

  The rear gear 196 is meshed with the front tilt drive gear 86 described above, and the front gear 198 is connected to a screw gear 200 (see FIG. 18A) disposed in the front tilt gear box 194. Has been. The screw gear 200 is rotatably supported by the front tilt gear box 194, and another screw gear 202 is engaged with the screw gear 200. The screw gear 202 is formed in a cylindrical shape, and is supported so as not to move relative to the front tilt gear box 194 in the axial direction and to rotate about the axis. A female screw is formed inside the screw gear 202, and a screw 204 having a male screw formed on the outer peripheral portion is screwed to the female screw. A flat plate-like connecting portion 204A is provided on the upper end side of the screw 204, and the connecting portion 204A is connected to a front end portion of an outer side arm 206 (see FIG. 17) constituting the front tilt mechanism 38 via a pin. Are connected. The outer side arm 206 is paired with the inner side arm 208, and the rear end portions of the outer side arm 206 are attached to the front frame 24 of the cushion frame 14 so as to be rotatable about an axis along the seat width direction. ing. Each of the outer side arm 206 and the inner side arm 208 is connected in the seat width direction via the connecting rod 210, and each front end side is connected to the lower surface of the cushion front frame 186 via the brackets 212 and 214. Yes.

  Here, when the translation knob 110 is slid in a state where the rotation knob 108 is disposed at the position shown in FIG. 12B, the rotational force of the motor 60 is transmitted to the front tilt drive gear 86, and the front The tilt drive gear 86 rotates. The rotation of the front tilt drive gear 86 is transmitted to the screw gear 202 via the gears 196 and 198 and the screw gear 200, and the screw gear 202 rotates. When the screw gear 202 rotates, the screw 204 screwed inside the screw gear 202 is moved in the axial direction (substantially up and down direction) with respect to the screw gear 202. Accordingly, the front end sides of the outer side arm 206 and the inner side arm 208 are swung up and down around the front frame 24, and the cushion front frame 186 is swung up and down around the pin 192. Thereby, the inclination angle of the front side of the seat surface of the seat cushion 12 is adjusted.

  In this case, when the translation knob 110 is operated in the arrow UP direction in FIG. 12B, the inclination angle of the seat cushion 12 on the front side of the seating surface is increased, and the translation knob 110 is moved in the direction of the arrow DOWN in FIG. When operated in the direction, the inclination angle of the seat cushion 12 on the front side of the seating surface is reduced.

  Next, the front lifter driving force transmission mechanism 54 that transmits the driving force from the one motor power unit 48 to the lifter mechanism 40 will be described.

(Configuration of lifter driving force transmission mechanism 54)
As shown in FIG. 19, the lifter mechanism 40 to which the lifter driving force transmission mechanism 54 transmits a driving force includes a pair of left and right front links 216 and 218 and a pair of left and right rear links 220 and 222. The front links 216 and 218 and the rear links 220 and 222 can rotate around the axis along the seat width direction with respect to the upper frames 126 and 128 (not shown in FIG. 19) of the slide rail 120 on the front end side (lower end side). The rear end side (upper end side) is connected to the side frames 20 and 22 of the cushion frame 14 so as to be rotatable around an axis along the seat width direction.

  Between the right front link 218 and the clutch mechanism 62, a lifter gear box 224 constituting the lifter driving force transmission mechanism 54 is disposed. The lifter gear box 224 is sandwiched between the plates 65A and 65B shown in FIGS. 4 and 5 and fastened to both. A shaft 226 protrudes inside the lifter gear box 224 in the seat width direction. The shaft 226 is rotatably supported by the lifter gear box 224 and the plate 65C described above in a state where the axial direction is along the seat width direction, and a gear 228 is fixed to the tip of the shaft 226.

  The gear 228 is meshed with the lifter drive gear 84 described above, and the shaft 226 is fixed to a screw gear 230 (see FIG. 20A) disposed in the lifter gear box 224. The lifter gear box 224 has the same configuration as the front tilt gear box 194 described above. When the screw gear 230 rotates, the screw gear 232 meshed with the screw gear 230 rotates and the screw 234 rotates. The screw gear 232 is moved in the axial direction (substantially the seat front-rear direction here). A flat plate-like connecting portion 234A is provided at the rear end portion of the screw 234, and the front end portion of the connecting pipe 236 is fixed to the connecting portion 234A. The rear end portion of the connection pipe 236 is rotatably connected to the upper end portion (rear end portion) of the right rear link 222 via a pin (not shown).

  Here, when the translation knob 110 is slid in a state where the rotary knob 108 is disposed at the position shown in FIG. 12C, the rotational force of the motor 60 is transmitted to the lifter drive gear 84, and the lifter drive is performed. The gear 84 rotates. The rotation of the lifter drive gear 84 is transmitted to the screw 234 via the gear 228, the shaft 226, and the screw gears 230 and 232, and the screw 234 is moved in the axial direction (substantially the seat front-rear direction) with respect to the screw gear 232. The As a result, the connecting pipe 236 is moved substantially in the front-rear direction of the seat, the rear link 222 is swung up and down about the front end side (lower end side), and the rear link 220 and the front link are interlocked with the rear link 222. The links 216 and 218 are swung up and down around each front end side. Thereby, the cushion frame 14 is moved up and down, and the seat surface height of the seat cushion 12 is adjusted in the up and down direction.

  In this case, when the translation knob 110 is operated in the arrow UP direction in FIG. 12C, the seat surface of the seat cushion 12 is raised, and the translation knob 110 is operated in the arrow DOWN direction in FIG. Then, the seat surface of the seat cushion 12 is lowered.

  Next, the lumbar driving force transmission mechanism 56 that transmits the driving force from the one motor power unit 48 to the lumbar mechanism 42 will be described.

(Configuration of lumbar driving force transmission mechanism 56)
As shown in FIG. 21, the lumbar mechanism 42 to which the lumbar driving force transmission mechanism 56 transmits the driving force includes a wire 238 whose one end is locked to the left side frame 28 of the back frame 18. An intermediate portion of the wire 238 is wound around the back side of the back spring 37 of the seat back 16 and is drawn out from between the right side frame 30 and the back spring 37 to the front side of the back frame 18. An intermediate portion of the wire 238 drawn to the front side of the back frame 18 is inserted inside a wire tube 242 whose one end is locked to the side frame 30. The other end of the wire tube 242 is disposed in the seat cushion 12 (not shown in FIG. 21), and the other end is locked to an extension 65E1 (see FIGS. 4 and 5) of the plate 65E. The other end of the wire 238 is drawn from the other end of the wire tube 242. The other end of the wire 238 is locked to a screw 246 provided in the lumbar gear box 244.

  The lumbar gear box 244 is basically configured in the same manner as the front tilt gear box 194 and the lifter gear box 224 described above, and the gear meshed with the lumbar drive gear 98 as shown in FIG. The rotation of H.248 is transmitted to the screw 246 via a gear 250 disposed on the lower side of the gear 248 and a pair of screw gears (not shown), and the screw 246 is moved in the seat longitudinal direction. The rear end side of the screw 246 is connected to the extension portion 65E1 shown in FIGS. 4 and 5 via a link 252 that functions as a rotation stop of the screw 246, and a wire 238 is connected to the rear end portion of the screw 246. The other end is locked.

  Here, when the translation knob 110 is slid in a state where the above-described rotation knob 108 is disposed at the position shown in FIG. 12E, the rotational force of the motor 60 is transmitted to the lumbar drive gear 98 to drive the lumbar. The gear 98 rotates. The rotation of the lumbar drive gear 98 is transmitted to the screw 246 via gears 248 and 250 and a screw gear (not shown), and the screw 246 is moved substantially in the front-rear direction of the seat. As a result, the wire 238 whose other end is locked to the rear end of the screw 246 is pushed and pulled, and the back spring 37 around which the intermediate portion of the wire 238 is wound back is swung in the front-rear direction of the seat back 16. Moved. As a result, the lower side of the seat back 16 is moved back and forth, and lumbar adjustment is performed.

  In this case, when the translation knob 110 is operated in the arrow FORWARD direction of FIG. 12E, the lower side of the backrest surface of the seat back 16 is pushed out to the front side of the seat back 16, and the translation knob 110 is moved to FIG. When operated in the direction of the arrow BACK in E), the lower side of the backrest surface of the seat back 16 is retracted to the rear side of the seat back 16.

  Next, the recliner driving force transmission mechanism 58 that transmits the driving force from the one motor power unit 48 to the recliner mechanism 46 will be described.

(Configuration of Recliner Driving Force Transmission Mechanism 58)
As shown in FIG. 23, the recliner mechanism 46 to which the recliner driving force transmission mechanism 58 transmits the driving force includes an outer side recliner unit 254 and an inner side recliner unit 256 (a pair of left and right recliner units). Yes. The outer side recliner unit 254 is disposed between the side frame 22 and the side frame 30 on the right side (outer side) of the vehicle seat 10, and the inner side recliner unit 256 is disposed on the left side (inner side) of the vehicle seat 10. The side frame 20 is disposed between the side frame 20 and the side frame 28. The recliner mechanism 46 includes a connecting shaft 258 that is spanned between the outer side recliner unit 254 and the inner side recliner unit 256.

  The recliner mechanism 46 described above is well known in the art, and is provided in the outer side recliner unit 254 and the inner side recliner unit 256 when the connecting shaft 258 is rotated around an axis along the seat width direction. The planetary gear mechanism that does not rotate rotates and the back frame 18 reclines with respect to the cushion frame 14.

  A recliner driving force transmission mechanism 58 is disposed between the outer side recliner unit 254 and the one motor power unit 48. The recliner driving force transmission mechanism 58 includes a front gear box 260 and a rear gear box 262 that are disposed on the outer side in the seat width direction with respect to the side frame 22 (see FIG. 1). The front gear box 260 is fixed to the front end side of the side frame 22 on the side of the clutch mechanism 62 with screws 261 (see FIG. 24), and the rear gear box 262 is a frame 264 of the outer side recliner unit 254 ( It is fixed with a screw 263 to the front end side of FIG. The frame 264 is fixed to the rear end portion of the side frame 22.

  As shown in FIG. 24, the front gear box 260 is formed in a box shape by fastening the outer side box 266 and the inner side box 268 with screws 270. Are arranged with an upper screw gear 272 and a lower screw gear 274 which are meshed with each other. The upper screw gear 272 is arranged in a state where the axial direction is along the sheet width direction, and is fixed to one end portion in the axial direction of the shaft 276 which is also arranged in a state where the axial direction is along the sheet width direction. The shaft 276 is rotatably supported by a bearing hole 278 formed in the outer side box 266 and a bearing hole (not shown) formed in the inner side box 268. The other axial end of the shaft 276 protrudes from the inner box 268 toward the inner side in the seat width direction (clutch mechanism 62 side), and a gear 280 is attached to the other axial end of the shaft 276. The gear 280 is meshed with the recliner drive gear 96 described above. Thereby, the rotational force of the recliner drive gear 96 is transmitted to the screw gear 272 via the gear 280 and the shaft 276.

  On the other hand, the lower screw gear 274 meshed with the screw gear 272 is arranged in a state where the axial direction is along the seat longitudinal direction, and is fixed to the front end portion (one axial end portion) of the spindle 282 which is a bar. ing. The spindle 282 is formed in a long cylindrical shape and is disposed on the outer side in the seat width direction with respect to the side frame 22 as shown in FIG. The spindle 282 is disposed in the seat cushion 12 with the axial direction along the front-rear direction of the seat, and is supported by the side frame 22 via the front gear box 260 and the rear gear box 262. In the present embodiment, the spindle 282 is disposed in a slightly inclined state with respect to the front-rear direction of the seat so as to gradually descend toward the front end side. Further, in the present embodiment, the spindle 282 is provided only on the side frame 22 side (one end side in the seat width direction) in the seat cushion 12, and the side frame 20 side (the other end side in the seat width direction) in the seat cushion 12. ) Is not provided with a spindle.

  A front end portion of the spindle 282 is rotatably supported by a pair of front and rear bearing portions 284 and 286 provided in the front gear box 260. The bearing portion 284 is formed by combining a semicircular concave portion 288 formed in the outer side box 266 and a semicircular concave portion 290 formed in the inner side box 268. The portion 286 is formed by combining a semicircular recess (not shown) formed in the outer box 266 and a semicircular recess 292 formed in the inner box 268. A ring-shaped cover 294 is attached to the front side of the bearing portion 284, and a similar cover 296 is attached to the rear side of the bearing portion 286.

  As shown in FIG. 25, the rear end portion of the spindle 282 is inserted into the rear gear box 262 and is rotatably supported by the rear gear box 262. The rear gear box 262 has basically the same configuration as the front gear box 260, and is disposed on the inner side in the seat width direction with respect to the frame 264 of the outer side recliner unit 254. In FIG. 25, in the rear gear box 262, the same components as those in the front gear box 260 are denoted by the same reference numerals.

  A screw gear 298 (first gear) is fixed to a rear end portion of the spindle 282 inserted inside the rear gear box 262, and the screw gear 298 is disposed below the screw gear 298. It is meshed with another screw gear 300 (second gear). The screw gear 300 is arranged in a state where the axial direction is along the sheet width direction, and is fixed to an intermediate portion in the axial direction of the shaft 302 which is also arranged in a state where the axial direction is along the sheet width direction. One end of the shaft 302 in the axial direction is rotatably supported by the inner side box 268 of the rear gear box 262, and the other end in the axial direction is rotatably supported by the outer side box 266 of the rear gear box 262. Has been. Further, the other axial end of the shaft 302 passes through the frame 264 of the outer recliner unit 254 and protrudes outward in the seat width direction of the frame 264.

  A reduction gear train 304 is disposed outside the frame 264 in the seat width direction, and a gear 306 constituting the reduction gear train 304 is fixed to the protruding portion of the shaft 302. The rotation of the gear 306 is transmitted to the final gear 312 of the reduction gear train 304 via the gears 308 and 310. The gear 312 is fixed to one end of the connecting shaft 258 in the axial direction. The gears 308 and 310 are arranged coaxially and are rotatably supported by a support shaft 314 provided on the frame 264. Further, the gears 306, 308, 310, and 312 of the reduction gear train 304 include a long plate-like holding plate 316 that is connected to the shaft 302, the support shaft 314, and the connecting shaft 258 by a locking tool 318 (for example, an E ring). By being locked, the shaft 302, the support shaft 314, and the connecting shaft 258 are held.

  Here, when the translation knob 110 is slid in a state where the rotation knob 108 is disposed at the position shown in FIG. 12D, the rotational force of the motor 60 is transmitted to the recliner drive gear 96, and the recliner drive is performed. The gear 96 rotates. The rotation of the recliner drive gear 96 is transmitted to the spindle 282 via the gear 280, the shaft 276, and the screw gears 272 and 274, and the spindle 282 is rotated around the axis along the seat front-rear direction. When the spindle 282 is rotated, the screw gear 298 fixed to the rear end portion of the spindle 282 rotates, and the screw gear 300 meshed with the screw gear 298 is integrated with the shaft 302 and the gear 306 of the reduction gear train 304. Rotate. The rotation of the gear 306 is decelerated by the reduction gear train 304 and transmitted to the final gear 312, and the gear 312 is rotated integrally with the connecting shaft 258. Accordingly, the outer side recliner unit 254 and the inner side recliner unit 256 are operated, and the back frame 18 is reclined with respect to the cushion frame 14.

  In this case, when the translation knob 110 is operated in the arrow FORWARD direction of FIG. 12D, the back frame 18 is tilted forward with respect to the cushion frame 14, and the translation knob 110 of FIG. When operated in the direction of the arrow BACK, the back frame 18 is tilted to the rear side of the seat with respect to the cushion frame 14.

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

(Operation and effect of this embodiment)
In the vehicle seat 10 having the above-described configuration, the one motor power unit 48 disposed on the front side in the seat cushion 12 includes the clutch mechanism 62 and the single motor 60. The rotational force of the motor 60 is a gear arbitrarily selected by the switch unit 104 among the slide drive gear 94, the recliner drive gear 96, the lifter drive gear 84, the front tilt drive gear 86, and the lumbar drive gear 98 of the clutch mechanism 62. And the selected gear is driven to rotate. The driving force of the gear includes a sliding driving force transmission mechanism 50, a front tilt driving force transmission mechanism 52, a lifter driving force transmission mechanism 54, a lumbar driving force transmission mechanism 56, and a recliner driving force transmission mechanism 58. It is transmitted to one driven mechanism among the slide mechanism 36, the front tilt mechanism 38, the lifter mechanism 40, the lumbar mechanism 42, and the recliner mechanism 46 through one driving force transmission mechanism.

  Here, in the vehicle seat 10, the front portion of the cushion frame 14, which is a skeleton member of the seat cushion 12, is constituted by the front frame 24 along the seat width direction. It is supported by the part frame 24 and the auxiliary frame 27. That is, since the skeleton member of the seat cushion 12 also functions as a support member for the one motor power unit 48, the configuration for supporting the one motor power unit 48 can be simplified. Thereby, it can avoid that the mass of the seat cushion 12 increases.

  Moreover, since the front frame 24 of the cushion frame 14 is formed of a pipe material having high strength, the lock load of the motor 60 can be favorably supported. That is, the motor 60 is locked when each of the driven mechanisms is forcibly stopped (for example, when the seat slide is limited to the limit of the slide range), but the strength of the vehicle seat 10 is high. Since the lock load of the motor 60 can be favorably supported by the high front frame 24, it is not necessary to add a rigid member for supporting the lock load. Therefore, it is possible to avoid an increase in the mass of the seat cushion 12 by this.

  Further, in this vehicle seat 10, since one motor power unit 48 is disposed on the front side having the most space in the seat cushion 12, the seat cushion 12 in which a seat cushion pad or the like (not shown) is disposed is arranged. The space on the center side and the rear side can be used effectively for securing cushioning properties. Thereby, it is possible to avoid an increase in size of the seat cushion 12 on which the one-motor power unit 48 is mounted while ensuring the cushioning property of the seat cushion 12 satisfactorily.

  Further, in the vehicle seat 10, the slide drive gear 94, the recliner drive gear 96, the lifter drive gear 84, the front tilt drive gear 86, and the lumbar drive gear 98 of one motor power unit 48 are arranged coaxially in the seat width direction. Has been placed. Thereby, since the dimension of the 1 motor power unit 48 in the front-rear direction of the seat can be set small, the 1 motor power unit 48 can be compactly disposed on the front side in the seat cushion 12. Therefore, the space in the seat cushion 12 can be effectively used also by this.

  Furthermore, in this vehicle seat 10, one motor power unit 48 is supported in a state of being suspended from the front frame 24 of the cushion frame 14 via a support bracket 64. Thereby, the space above the front frame 24 can be prevented from being eroded unnecessarily by the arrangement space of the one motor power unit 48, and the degree of freedom of arrangement of the cushion front frame 186 can be ensured.

  Moreover, the support bracket 64 is mainly subjected to a tensile load due to the mass of the one motor power unit 48, and is not required to have a high bending rigidity, so that the mass of the support bracket increases to ensure the bending rigidity of the support bracket 64. Can be avoided.

  In the vehicle seat 10, the support bracket 64 of the one motor power unit 48 is supported at the front end side by the front frame 24 of the cushion frame 14, and the rear end side at the rear side of the front frame 24 along the seat width direction. The auxiliary frame 27 is supported. That is, since the front and rear ends of the support bracket 64 are supported by the constituent members of the cushion frame 14, the load on the front frame 24 and the auxiliary frame 27 is halved. Thereby, the support rigidity of the 1 motor power unit 48 to the cushion frame 14 via the support bracket 64 can be ensured satisfactorily, and the lock load of the motor 60 can be favorably supported.

  Furthermore, in this vehicle seat 10, when attaching the support bracket 64 that supports the one motor power unit 48 to the cushion frame 14, after hooking the hook portion 75 provided on the support bracket 64 on the front frame 24, The locking portion 81 provided on the support bracket 64 is locked to the auxiliary frame 27 by the rotation plate 87. Thereby, the separation of the hook portion 75 from the front frame 24 is prevented, and the support bracket 64 is attached to the cushion frame 14, so that the one-motor power unit 48 can be easily attached to the cushion frame 14.

  Moreover, in this vehicle seat 10, a plurality of plates 65A to 65G constituting the support bracket 64 are arranged side by side in the seat width direction with the plate thickness direction aligned with the seat width direction, and one motor power unit 48 is assembled to the support bracket 64 in a state of passing through these plates. Accordingly, the one motor power unit 48 can be supported by the support bracket 64 having a simple and lightweight configuration with respect to the front frame 24 along the seat width direction.

  Further, in the vehicle seat 10, one motor power unit is disposed so as to be biased toward the side where the switch unit 104 is provided (the right side of the seat) in the seat width direction. Therefore, the configuration for transmitting the operating force from the switch unit 104 to the one motor power unit 48 can be made small and simple.

  In the above-described embodiment, the one motor power unit 48 is arranged so as to be biased to the right side of the seat in the sheet width direction. However, the invention according to claims 1 to 6 is not limited thereto, It may be configured to be arranged in the center portion in the sheet width direction, or may be arranged to be biased to the left side of the sheet.

  In the above embodiment, the support bracket 64 includes a plurality of plates 65A to 65G, and the one motor power unit 48 is assembled to the support bracket 64 in a state of passing through the plates 65A to 65G. The invention according to the first to fifth aspects is not limited thereto, and the configuration of the support bracket 64 can be changed as appropriate.

  Furthermore, in the above-described embodiment, the support bracket 64 is configured such that the hook portion 75 provided on the front end side is hooked on the front frame 24 and the locking portion 81 provided on the rear end side is locked on the auxiliary frame 27. However, the invention according to claims 1 to 4 is not limited thereto, and the support bracket 64 is fastened to the front frame 24 by a fastener such as a screw. It may be.

  In the above embodiment, the cushion frame 14 has the auxiliary frame 27 disposed on the seat rear side of the front frame 24, and the rear end side of the support bracket 64 is engaged with the auxiliary frame 27. The invention according to claims 1 to 3 is not limited to this, and the auxiliary frame 27 may be omitted (the support bracket 64 is supported only by the front frame 24). The auxiliary frame 27 may be arranged below the one motor power unit 48.

  Moreover, in the said embodiment, although it was set as the structure where the 1 motor power unit 48 was supported in the state suspended from the front frame 24 via the support bracket 64, the invention which concerns on Claim 1-2 is this. However, the support structure for the front frame 24 of the one motor power unit 48 can be changed as appropriate.

  Furthermore, in the above embodiment, the slide drive gear 94, the recliner drive gear 96, the lifter drive gear 84, the front tilt drive gear 86, and the lumbar drive gear 98 of the one motor power unit 48 are arranged coaxially in the seat width direction. However, the invention according to claim 1 is not limited to this, and the configuration of one motor power unit 48 can be changed as appropriate.

  In addition, the present invention can be implemented with various modifications without departing from the scope of the invention. Needless to say, the scope of rights of the present invention is not limited to the above embodiments.

10 Vehicle Seat 12 Seat Cushion (Seat Body)
14 Cushion frame 16 Seat back (Seat body)
24 Front frame 27 Auxiliary frame 36 Slide mechanism (driven mechanism)
38 Front tilt mechanism (driven mechanism)
40 Lifter mechanism (driven mechanism)
42 Lumber mechanism (driven mechanism)
46 Recliner mechanism (driven mechanism)
48 1 Motor power unit 50 Slide driving force transmission mechanism 52 Front tilt driving force transmission mechanism 54 Lifter driving force transmission mechanism 56 Lumber driving force transmission mechanism 58 Recliner driving force transmission mechanism 60 Motor 64 Support brackets 65A to 65G Plate 75 Hooking part 81 Locking part 87 Rotating plate (locking means)
97 pin (locking means)
99 clips (locking means)
84 Lifter drive gear (rotating body)
86 Front tilt drive gear (rotating body)
94 Slide drive gear (rotating body)
96 Recliner drive gear (rotating body)
98 Lumber drive gear (rotating body)
104 Switch unit (operated member)

Claims (7)

A seat body in which a plurality of driven mechanisms are provided, and a front portion of a cushion frame that is a skeleton member of the seat cushion is configured by a front frame along the seat width direction;
A plurality of rotating bodies and a single motor which are arranged on the front side in the seat cushion and are supported by the front frame and individually correspond to the plurality of driven mechanisms, and the rotation of the motor One motor power unit for transmitting a force to an arbitrarily selected rotating body among the plurality of rotating bodies to rotationally drive the selected rotating body;
A plurality of driving force transmission mechanisms for individually transmitting a driving force from the plurality of rotating bodies to the plurality of driven mechanisms;
Vehicle seat equipped with   The vehicle seat according to claim 1, wherein the plurality of rotating bodies are arranged coaxially in the seat width direction.   The vehicle seat according to claim 1, wherein the one motor power unit is supported in a state of being suspended from the front frame via a support bracket.   The cushion frame has an auxiliary frame disposed along the seat width direction on the rear side of the front frame, and the support bracket is supported by the front frame on the front end side and on the auxiliary frame on the rear end side. The vehicle seat according to claim 3, wherein the vehicle seat is supported.   The support bracket includes a hook portion that is hooked on one of the front frame and the auxiliary frame, and a locking portion that is locked to either the front frame or the auxiliary frame by a locking means. 5. The vehicle seat according to claim 4, wherein the hooking portion is locked to the other to prevent the hooking portion from being detached from the one.   The support bracket includes a plurality of plates arranged in a seat width direction, and the one motor power unit is assembled to the support bracket in a state of penetrating the plurality of plates. The vehicle seat according to claim 5.   An operated member is provided on one of the left and right side portions of the seat cushion, and an operating force when the operated member is operated is transmitted to the one motor power unit, thereby the plurality of rotating bodies. The rotating body to which the rotational force of the motor is transmitted is selected, and the one motor power unit is disposed on the side where the operated member is provided in the sheet width direction. The vehicle seat according to any one of claims 1 to 6.

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