JP4917389B2 - Sheet - Google Patents

Description

  The present invention relates to a seat having a reclining mechanism.

  In a seat having a reclining mechanism, for example, there are a plurality of urging means such as urging means for urging the seat back in a forward tilting direction, and urging means for urging the operation lever of the reclining mechanism in the locking direction. There is something to have.

The plurality of urging means are provided along the rotation center axis of the seat back (see, for example, Patent Document 1 and Patent Document 2).
JP 2001-169846 A (FIG. 4) JP 2000-102439 A (FIG. 1)

  Accordingly, the biasing means protrudes in the direction of the rotation center axis of the seat back, the seat looks bad, and when the seat is installed in the vehicle, the space between the side portion of the seat and the member facing the side portion of the seat There is a problem that becomes narrower.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a sheet that has a good appearance and can secure a wide space on the side of the sheet.

  According to a first aspect of the present invention, there is provided a seat cushion for supporting a seated person's buttocks, a seat back for supporting a seated person's back, a first member provided on the seat cushion, the seat back, The first member and the second member are provided on one member side of the second member, the first member, and the second member that are rotatable relative to one member, and are engaged and disengaged on the other member side. A lock member that prohibits / permits relative rotation with the second member, and is arranged in parallel with the rotation center axis of the seat back, and is fitted to the lock member and rotated to move the lock member to the other member side. A reclining mechanism having a shaft to be engaged and disengaged, and a first end that is locked to the seat cushion side, the other end is locked to the seat back, and the seat back is biased in a forward tilting direction. The biasing means, one end of which is locked to either the seat cushion side or the seat back side, the other end is locked to the shaft, and in a direction to eliminate backlash between the shaft and the lock member A second urging means for urging the shaft; and a seat provided on a side of the seat cushion other than the rotation center of the seat back, and on a straight line parallel to the rotation center axis of the seat back A spring locking portion having a first locking surface along the first locking surface, and a second locking surface formed on the same circumference around the first locking surface and the rotation center axis of the seat back, The first urging means is a spiral spring having an inner end portion engaged with the first engagement surface of the spring engagement portion and an outer end portion engaged with the seat back, and the second urging portion. The means is that the inner end is on the shaft. Sealed, sheet, wherein the outer end portion is spiral spring which is engaged with the second engaging surface of the spring engaging portion.

According to a second aspect of the present invention, the spring locking portion is formed on a surface along a straight line parallel to the rotation center axis of the seat back, and on a circumference around the rotation center axis of the seat back. A first recess that is recessed in one direction and whose bottom is the first locking surface;
A second recess formed on the first locking surface of the first recess, recessed in one direction on a circumference around the rotation center axis of the seat back, and having a bottom surface serving as the second locking surface; The sheet according to claim 1, further comprising:

In the present specification, “parallel to the rotation center axis of the seat back” includes not only parallel to the rotation center axis of the seat back but also substantially parallel to the rotation center axis of the seat back.
The “straight line parallel to the rotation center axis of the seat back” includes not only a straight line parallel to the rotation center axis of the seat back but also a straight line substantially along the rotation center axis of the seat back.

  Further, “the same circumference around the rotation center axis of the seat back” includes not only the same circumference around the rotation center axis of the seat back but also substantially the same circumference.

  According to the first and second aspects of the present invention, on the seat cushion side, the first latch is provided at a location other than the rotation center of the seat back and along a straight line parallel to the rotation center axis of the seat back. A spring engaging portion having a surface and a second engaging surface formed on the same circumference with the first engaging surface and the rotation center axis of the seat back as a center, and the first urging means comprises: The inner end portion is a spiral spring locked to the first locking surface of the spring locking portion, the outer end portion is locked to the seat back, and the second biasing means has an inner end portion Since the spiral spring is locked to the shaft and the outer end is locked to the second locking surface of the spring locking portion, the first attachment is provided on the surface orthogonal to the rotation center axis of the seat back. Since the biasing means and the second biasing means are arranged, it looks good The space of the sheet side can be widely ensured.

  According to the second aspect of the present invention, since the first locking surface is formed on the bottom surface of the first recess and the second locking surface is formed on the bottom surface of the second recess, the inner wall surface of the first recess is the first. The inner wall surface of the second recess at the inner end of the spiral spring of the urging means serves as a stopper for the outer end of the spiral spring of the second urging means.

  Further, the spring locking portion is formed on a surface along a straight line parallel to the rotation center axis of the seat back, and is recessed in one direction on a circumference around the rotation center axis of the seat back, A bottom surface is formed in the first recess, which is the first locking surface, and the first locking surface of the first recess, and is recessed in one direction on a circumference around the rotation center axis of the seat back. The inner end of the spring of the first urging means locked to the first locking surface is engaged with the second locking surface by having the second recess having the bottom surface as the second locking surface. It acts as a stopper for the outer end portion of the spira spring of the stopped second urging means.

  First, as shown in FIG. 10, the seat 1 of this embodiment includes a seat cushion 3 that supports a seated person's buttocks and a seatback 5 that supports the seated person's back. A reclining unit (reclining mechanism) 90 is provided on both sides of the seat 1.

  Next, as shown in FIG. 4, in the seat of this embodiment, the base plate 100 as the second member is attached to the lower arm 201 on the seat cushion 3 side, and the upper arm 202 on the seat back 5 side is attached as the first member. A ratchet plate 130 is attached.

  As shown in FIG. 3 to FIG. 6, by fitting a disc-shaped ratchet plate (second member) 130 to a disc-shaped base plate (first member) 100, both are overlapped so as to be relatively rotatable. ing. The reclining unit 90 is completed by providing an angle adjusting mechanism (described later) for adjusting the relative rotation angle between the base plate 100 and the ratchet plate 130 between the base plate 100 and the ratchet plate 130.

  The cylindrical mounting bracket 205 wraps the base plate 100 and the ratchet plate 130 from the outside, and prohibits the ratchet plate 130 from separating from the base plate 100. Specifically, one end of the mounting bracket 205 is locked to the outer peripheral portion of the base plate 100, and the ratchet plate holding portion 205a on the other end side presses the ratchet plate 130 from the rotation center axis direction.

  A hole 101 and a hole 131 are formed at positions on the rotation center axis of the base plate 100 and the ratchet plate 130, and an operation shaft 120 as a shaft is inserted into the hole 101 and the hole 131. As shown in FIGS. 4 and 6, a circular recess 132 centering on the operation shaft 120 is formed on the surface of the ratchet plate 130 facing the base plate 100, and the inner peripheral wall surface of the recess 132 has an inner wall. Teeth 133 are engraved.

  As shown in FIGS. 4 and 6, a recess 104 is formed on the surface of the base plate 100 facing the recess 132 of the ratchet plate 130, and as shown in FIG. A pair of guide projections 105, 106 and a pair of guide projections 107, 108 project toward the plate 130.

  In this embodiment, the base plate 100 is manufactured by using forging, and in this case, the guide protrusions 105, 106 are formed so that no recess is formed on the back side of the guide protrusions 105, 106, 107, and 108 on the base plate 100. , 107 and 108 are formed in a solid shape, and the thickness of the peripheral portion thereof is made sufficiently large to increase the strength of the guide protrusions 105, 106, 107 and 108.

  On the surface of the base plate 100 opposite to the ratchet plate 130 side (the outer surface of the base plate 100), a plurality of protrusions 100a are equidistantly arranged on the same circumference around the hole 101 (coaxial with the rotation center axis O). It is arranged. A plurality of protrusions 130 a are also arranged at equal intervals on the same circumference around the hole 131 on the surface of the ratchet plate 130 opposite to the base plate 100 (the outer surface of the ratchet plate 130).

  The pole 140 has outer teeth 141 on the front end surface side that can be engaged and disengaged from the radial direction of the tip circle on the inner teeth 133 of the ratchet plate 130. As shown in FIG. 7, the guide surfaces of the guide protrusions 105 and 106 105a and 106a are slidably guided in the direction orthogonal to the rotation center axis of the ratchet plate 130, that is, in the radial direction of the tip circle of the internal teeth 133.

  The pole 150 has the same shape as the pole 140, is sandwiched between the guide surfaces 107a and 108a of the guide protrusions 107 and 108, is slidably guided in the radial direction of the tip circle of the inner tooth 133, and is on the front end surface side. The outer teeth 151 can be engaged with the inner teeth 133 of the ratchet plate 130.

  A cam 170 that can rotate together with the operation shaft 120 is disposed in the space on the rear end surfaces 146 and 156 side of the poles 140 and 150. That is, as shown in FIG. 4, a cross-sectional oval portion 123 is formed in the intermediate portion of the operation shaft 120, and this cross-sectional oval portion 123 is fitted in the oval hole 171 of the cam 170. As a result, the operation shaft 120 and the cam 170 are fitted in a state where relative rotation is impossible, and the cam 170 rotates together with the operation shaft 120.

The poles 140 and 150 and the cam 170 are formed to have the same thickness and are disposed on the same plane of the base plate 100. The cam 170 has an inclined cam surface 174b for pressing the rear end surfaces 146 and 156 of the poles 140 and 150 when the cam 170 rotates to mesh the outer teeth 141 and 151 of the poles 140 and 150 with the inner teeth 133 of the ratchet plate 130. , 175b. In order to perform this function, the inclined cam surfaces 174b and 175b are inclined in the inclined direction when the cam 170 rotates in the locked rotation direction.
5b and the rear end surfaces 146 and 156 of the poles 140 and 150 are set in a direction away from the rotation center axis O of the cam 170. For example, as shown for the inclined cam surface 175b in FIG. It becomes a straight line.

  Further, the cam 170 is positioned on the front side in the rotation direction when the cam 170 is locked (counterclockwise in FIG. 8) with respect to the inclined cam surfaces 174b and 175b, and the external teeth 141 and 151 of the poles 140 and 150 and the ratchet. When meshing with the internal teeth 133 of the plate 130, support surfaces 174a and 175a are provided at the ends of the rear end surfaces 146 and 156 of the poles 140 and 150 (front portions in the rotation direction when the cam 170 is locked) via a gap. ing. When the counterclockwise load in FIG. 8 is applied from the ratchet plate 130 to the poles 140 and 150 from the ratchet plate 130, the support surfaces 174a and 175a abut against the ends of the rear end surfaces 146 and 156 of the poles 140 and 150. And further tilting of the poles 140 and 150 is prohibited.

  Further, the cam 170 is located on the rear side in the rotation direction when the cam 170 is locked with respect to the inclined cam surfaces 174 b and 175 b, and between the outer teeth 141 and 151 of the poles 140 and 150 and the inner teeth 133 of the ratchet plate 130. Support surfaces 174c and 175c are provided so as to face the end portions of the rear end surfaces 146 and 156 of the poles 140 and 150 (the rear side portion in the rotation direction when the cam 170 is locked) when engaged. When the clockwise load in FIG. 8 is applied from the ratchet plate 130 to the poles 140 and 150 from the ratchet plate 130, the support surfaces 174c and 175c abut against the end portions of the rear end surfaces 146 and 156 of the poles 140 and 150. It supports and prohibits further tilting of the poles 140 and 150.

  Cam grooves 144 and 154 are formed on the surface of the poles 140 and 150 on the ratchet plate 130 side (in this embodiment, the cam grooves 144 and 154 are holes penetrating to the surface on the base plate 100 side). . The release plate 180 constituting the release means is arranged so that one surface thereof overlaps with the poles 140 and 150 and the cam 170 and the other surface is in sliding contact with the ratchet plate 130. A hole 181 through which the operation shaft 120 is inserted is formed in the central portion of the release plate 180.

  As shown in FIGS. 7 and 8, the cam 170 has protrusions 176 and 177 protruding toward the ratchet plate 130, and these protrusions 176 and 177 are formed at the edge of the hole 181 of the release plate 180. It is fitted in small slots 182 and 183 extending in the radial direction. For this reason, the cam 170 and the release plate 180 rotate in conjunction with each other.

  Further, as shown in FIGS. 4 and 7, projections 183 and 184 that engage with the cam grooves 144 and 154 are formed on the rotating end portion of the release plate 180 by press molding or the like. The cam grooves 144 and 154 are shaped so that when the release plate 180 rotates in the clockwise direction in FIG. 7, the pawls 140 and 150 are moved toward the rotation center side of the cam 170 by the interaction between the cam grooves 144 and 154 and the protrusions 183 and 184. It is set to move forcibly.

  As shown in FIGS. 7 and 8, spiral springs 191 and 195 as urging means have inner ends hooked to hooks 111 and 112 of the base plate 100 and outer ends hooked to step portions 178 and 179 of the cam 170. The cam 170 is rotated and biased so that the cam 170 pushes the rear end surfaces 146 and 156 of the poles 140 and 150.

  Further, as shown in FIG. 4, the thickness of the pole 140 is set to a thickness that faces the bottom surface of the concave portion 132 of the ratchet plate 130, the release plate 180, and the bottom surface of the concave portion 104 of the base plate 100 with a slight gap. The ratchet plate 130 does not move in the direction of the rotation center axis. Therefore, as shown in FIG. 4, the external teeth 141 of the pole 140 have a portion that does not mesh with the internal teeth 133 of the ratchet plate 130 in the tooth width direction.

  The operation of the reclining unit 90 configured as described above will be described. In the locked state, the urging force of the spiral springs 191 and 195 causes the cam 170 to push the rear end surfaces 146 and 156 of the poles 140 and 150, and the external teeth 141 and 151 of the poles 140 and 150 mesh with the internal teeth 133 of the ratchet plate 130. In this state, the rotation of the ratchet plate (seat back) 130 is prohibited.

  The movement at the time of shifting to the locked state will be described. The cam 170 that receives the urging force of the spiral springs 191 and 195 is a direction in which the external teeth 141 and 151 of the poles 140 and 150 are engaged with the internal teeth 133 of the ratchet plate 130. Rotate first. Accordingly, the inclined cam surfaces 174b and 175b of the cam 170 press the rear end surfaces 146 and 156 of the poles 140 and 150, and the outer teeth 141 and 151 of the poles 140 and 150 mesh with the inner teeth 133 of the ratchet plate 130. Move in the radial direction.

  In a locked state in which the external teeth 151 of the pawl 150 and the internal teeth 133 of the ratchet plate 130 are engaged, when a load is applied from the ratchet plate 130 to the pawl 150 due to a vehicle collision or the like, the pawl 150 has an inclined cam surface 175b of the cam 170 and It will be supported by the support surfaces 175a and 175c.

  When the operation shaft 120 is rotated clockwise in FIG. 8 against the biasing force of the spiral springs 191 and 195 in the locked state, and the cam 170 is also rotated clockwise, the rear end surfaces of the poles 140 and 150 of the cam 170 are rotated. 146 and 156 are released, the projections 183 and 184 of the release plate 180 are in sliding contact with the inclined wall surfaces of the cam grooves 144 and 154 of the poles 140 and 150, and the external teeth 141 and 151 of the poles 140 and 150 are ratchet. The poles 140 and 150 retreat in a direction away from the inner teeth 133 of the plate 130, the meshing between the outer teeth 141 and 151 of the poles 140 and 150 and the inner teeth 133 of the ratchet plate 130 is released, and the ratchet plate (seat back) 130 can be tilted (unlocked state).

  When the seat back is tilted to a desired angle and the operation force to the operation shaft 120 is released, the cam 170 pushes the rear end surfaces 146 and 156 of the poles 140 and 150 by the urging force of the spiral springs 191 and 195, The 150 external teeth 141 and 151 mesh with the internal teeth 133 of the ratchet plate 130 again to return to a state where the rotation of the ratchet plate (seat back) 130 is prohibited.

  Next, the sheet 1 of the present embodiment will be described with reference to FIGS. 1, 2, and 9. As shown in FIG. 1, the reclining unit 90 is provided on both sides of the seat 1. Since the configuration of one side of the seat 1 and the configuration of the other side of the seat 1 are substantially the same, the same part as the one side of the other side is given the same reference symbol with a dash ('), and overlapping description Is omitted.

  As shown in FIG. 9, an operation handle 353 is fixed to the operation shaft 120 'of the reclining unit 90' on the other side. The rotation of the operation shaft 120 ′ of the reclining unit 90 ′ on the other side is performed via a transmission shaft 351 in which the other end side is fixed to the operation shaft 120 ′ and one end side is fixed to the operation shaft 120. , And is transmitted to the operation shaft 120 of the reclining unit 90 on one side. Accordingly, the operation shaft 120 ′, the transmission shaft 351, and the operation shaft 120 integrated with each other move the movement of the cam (lock member) 170 of one reclining unit 90 to the cam (lock member) 170 ′ of the other reclining unit 90 ′. It functions as a transmission member for transmission.

  As shown in FIGS. 1 and 9, holes 201 a and 202 a through which the operation shaft 120 is inserted are formed in the lower arm 201 and the upper arm 202. As shown in FIG. 1, a first spring locking portion 300 is formed on the upper arm 202.

  As shown in FIGS. 1 and 9, a semi-cylindrical second spring locking portion 301 centering on the axis of the operation shaft 120 is formed around the hole 201 a of the lower arm 201. The second spring locking portion 301 has a surface 301 a along a straight line parallel to the rotation center axis (the axis of the shaft 120) of the seat back 5. The surface 301a is formed with a first recess 301c that is recessed in one direction on the circumference around the rotation center axis of the seat back 5 and whose bottom surface is the first locking surface 301b. Further, the first locking surface (bottom surface) 301b of the first recess 301c is recessed in one direction on the circumference around the rotation center axis of the seat back 5, and the bottom surface is the second locking surface 301d. A certain second recess 301e is formed.

  Then, the inner end portion of the first spiral spring 311 as the first urging means is engaged with the first engagement surface 301 b of the second spring engagement portion 301, and the outer end portion of the upper arm (seat back 5) 202. The first spring hooking portion 300 is locked. The seat back (upper arm 202) 5 is urged in the forward tilt direction by the urging force of the first spiral spring 311.

  Further, the inner end portion of the second spiral spring 321 as the second urging means is locked to the slit portion 120a formed at the end portion of the operation shaft 120 as the transmission member, and the end portion is the second spring locking portion. It is locked to the second locking surface 301d of 301. The backlash between the operation shaft 120 of one reclining unit 90 and the cam 170 and the backlash between the operation shaft 120 ′ of the other reclining unit 90 ′ and the cam 170 ′ are absorbed by the urging force of the second spiral spring 321. ing.

According to the configuration of such an embodiment, the following effects can be obtained.
(1) Since the first spiral spring 311 and the second spiral spring 321 are arranged on the surface orthogonal to the rotation center axis (operation shaft 120) of the seat back 5, the appearance is good and the space at the side of the seat is good. Can be secured widely.
(2) As shown in FIG. 1B, the first locking surface 301b is formed on the bottom surface of the first recess 301c, and the second locking surface 301d is formed on the bottom surface of the second recess 301e. The wall surface of the first recess 301 c serves to prevent the inner end of the first spiral spring 311 from slipping, and the inner wall surface of the second recess 301 e serves to prevent the outer end of the second spiral spring 321 from slipping.
(3) As shown in FIG. 1B, the inner end portion of the first spiral spring 311 locked to the first locking surface 301b is the second spiral spring locked to the second locking surface 301d. It functions as a stopper for the outer end portion of 321.

  The present invention is not limited to the above embodiment. In the above embodiment, the reclining unit 90 has been described with a sheet having a both-side reclining mechanism provided on both sides of the seat 1, but the present invention is directed to a seat having a one-side reclining mechanism provided on one side of the seat. Is also applicable.

It is a figure explaining the invention part of the sheet | seat of the form example of this invention, (a) A figure is a disassembled perspective view, (b) A figure is a G direction arrow line view of (a) figure. It is a side view of the sheet | seat of the form example of this invention. It is a front view of the reclining unit of the sheet in the embodiment of the present invention. FIG. 4 is a cross-sectional view taken along a cutting line CC in FIG. 3 to which an upper arm and a lower arm are added. It is a rear view of the reclining unit shown in FIG. FIG. 4 is a cross-sectional view taken along a cutting line DD in FIG. 3. It is sectional drawing in the cutting line EE of FIG. FIG. 8 is a diagram in which the release plate of FIG. 7 is removed. It is a disassembled perspective view of the principal part of the sheet | seat of the form example of this invention. It is a figure explaining the whole structure of the sheet | seat of the example of this invention.

Explanation of symbols

120 Operation shaft 301 Spring locking portion 301b First locking surface 301d Second locking surface 311 First spiral spring 321 Second spiral spring

Claims (2)

A seat cushion that supports the buttocks of the seated person,
A seat back that supports the back of the seated person,
A first member provided on the seat cushion, a second member provided on the seat back and rotatable relative to the first member, on the one member side of the first member and the second member. A locking member that is disposed in parallel with the rotation center axis of the seat back, the locking member prohibiting / permitting relative rotation between the first member and the second member by engaging / disengaging to the other member side; A reclining mechanism having a shaft that engages with a member and rotates to engage and disengage the lock member to the other member side;
A first urging means for urging the seat back in a forward tilting direction with one end locked to the seat cushion side and the other end locked to the seat back;
One end is locked to either the seat cushion side or the seat back side, the other end is locked to the shaft, and the shaft is attached in a direction to eliminate play between the shaft and the lock member. Second energizing means for energizing,
A sheet having
On the seat cushion side, provided at a place other than the rotation center of the seat back, a first locking surface along a straight line parallel to the rotation center axis of the seat back, and the first locking surface and the seat Providing a spring locking portion having a second locking surface formed on the same circumference around the rotation center axis of the back;
The first biasing means is a spiral spring whose inner end is locked to the first locking surface of the spring locking portion and whose outer end is locked to the seat back.
The sheet according to claim 2, wherein the second urging means is a spiral spring having an inner end locked to the shaft and an outer end locked to a second locking surface of the spring locking portion. The spring locking portion is
The seat back is formed on a surface along a straight line parallel to the rotation center axis of the seat back, and is recessed in one direction on the circumference around the rotation center axis of the seat back, and the bottom surface is the first locking surface. A first recess,
A second recess formed on the first locking surface of the first recess, recessed in one direction on a circumference around the rotation center axis of the seat back, and having a bottom surface serving as the second locking surface; ,
The sheet according to claim 1, comprising:

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