JPH1044841A - Seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operable seat comprising a link mechanism for vertically moving its seat cushion with respect to the floor and a lock mechanism for hindering the operation of the link mechanism. SOLUTION: A seat includes an unlock lever 133 turnably arranged on a lower arm or seat cushion 24 for unlocking a lock mechanism upon the pulling-up of a handle or operation part 136, and a lifter plate 132 turnably arranged on the lower arm or seat cushion 24 and connected to the link mechanism for driving the link mechanism in the direction to lift the lower arm or seat cushion 24 when pressed up by the unlock lever 133 pulled up in its unlocking direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat provided on a vehicle or the like and having a seat cushion movable in a vertical direction.

[0002]

2. Description of the Related Art Next, a conventional example will be described with reference to the drawings.
FIG. 20 is a configuration diagram illustrating an example of a conventional seat in which a seat cushion moves in a vertical direction.

In FIG. 1, reference numeral 1 denotes a seat slide mechanism comprising a lower rail 2 fixed to the floor side and an upper rail 3 slidably engaged with the lower rail 2.
Reference numeral 4 denotes a first lower arm connected to the frame of the seat cushion. 5 is a first link whose one end is rotatably attached to the rear of the upper rail 3 and the other end is rotatably attached to the rear of the first lower arm 4, and 6 is one end of the upper rail. 3 is rotatably mounted on the front of the first lower arm 4, and the other end is rotatably mounted on the front of the first lower arm 4, and the second link has a length substantially equal to that of the first link 5. is there.

A second lower arm 7 has a base end rotatably attached to the first lower arm 4 and is connected to a frame of a seat cushion. 8 has one end second
A third link rotatably attached to the front of the lower arm 7 and the other end rotatably attached to the front of the upper rail 3.

[0005] A plurality of teeth 5a are formed on an arc centered on the rotation center axis above the first link 5.
Reference numeral 9 denotes a lock member rotatably provided on the first lower arm 4 and formed with teeth 9a that can mesh with the teeth 5a of the first link 5. The locking member 9 has one end locked to the first lower arm 4 and the other end locked to the back of the locking member 9 by the urging force of a spring 10 to engage the teeth 9a.
Are urged in the direction of meshing with the teeth 5a of the first link 5.

Reference numeral 11 denotes a lifter operation unit. As shown in FIG. 21, the lifter operation section 11 uses a lifter lever 13 fixed to a lifter hinge 12 rotatably provided on the first lower arm 4 (lower arm side), and a pin 14 for the lifter lever 13. And a lock release lever 15 rotatably mounted.

Reference numeral 16 denotes a tubular outer cable 16a.
Cable 1 that passes through the inner cable 16a and the outer cable 16a
6b, one end of the outer cable 16a is engaged with the cut-and-raised portion 4a formed on the first lower arm 4, and the other end is engaged with the lift plate 13 of the lifter operation unit 11. And the inner cable 16b
Is locked by a lock member 9, and the other end is locked by a lock release lever 15 of the lifter operation unit 11.

Further, one end of a link 17 is fixed to the lifter hinge pin 12, and a pin 1 is connected to the other end.
8, one end of the link 19 is rotatably mounted. Further, the other end of the link 19 is
It is rotatably attached to the upper rail 3 using.

Next, the operation of the above configuration will be described. Upper rail 3, first lower arm 4, first link 5, and sixth link
Link 6 forms a parallel link, and when the first link 5 or the sixth link 6 is rotated, the first lower arm 4
Is adapted to move up and down in parallel with the upper rail 3.

However, normally, the teeth 9a of the lock member 9 are moved by the urging force of the spring 10
a in which the rotation of the first link 5 is prohibited.
(Locked).

Here, when the seat cushion is raised and lowered, the occupant grasps the lock release lever 15 of the lifter operation unit 11 with the waist raised from the seat cushion. That is, the lock release lever 15 is rotated clockwise with respect to the lifter lever 13 in FIG. Due to the rotation of the lock release lever 15, the inner cable 16b of the cable 16 is pulled against the urging force of the spring 10, and the teeth 9a of the lock member 9 and the teeth 5a of the first link 5 are pulled.
Is released (lock release state).

Thereafter, while holding the lock release lever 15 in the unlocked state, the lifter lever 13 is lifted in the upper right direction in FIG. Then, the first lower arm 4 rises in parallel with the upper rail 3.

On the other hand, since the second lower arm 7 is connected to the upper rail 3 via the third link 8, FIG.
When the first lower arm 4 rises from the state shown in FIG. 0, the amount of rise of the second lower arm 7 is smaller than the amount of rise of the first lower arm 4. Further, when the first lower arm 4 descends, the descending amount of the second lower arm 7 becomes larger than the descending amount of the first lower arm 4, that is, the angle of the seat cushion with respect to the floor changes. (Hereinafter, in the present specification, such a movement is referred to as a vertical movement with an angle change.)

When the seat cushion has been raised to a desired height, the operating force on the lock release lever 15 is released. Then, the teeth 9a of the lock member 9 mesh with the teeth 5a of the first link 5 to be in a locked state, the rotation of the first link 5 is prohibited, and the seat cushion holds its position.

Conversely, when lowering the seat cushion, the occupant operates the lock release lever 15 of the lifter operating section 11 while sitting on the seat cushion.
When the lock release lever 15 is operated, the lock is released,
That is, the first link 5 becomes rotatable, and the seat cushion is lowered by the weight of the seated person.

When the seat cushion is lowered to a desired height, when the operating force on the lock release lever 15 is released, the teeth 9a of the lock member 9 mesh with the teeth 5a of the first link 5, and the lock state is established. Thus, the rotation of the first link 5 is prohibited, and the seat cushion holds that position.

In such a seat, when the seat is lifted, the amount of rise of the front side of the seat cushion is reduced, so that the foot of the seat occupant is lower than when the seat cushion is raised in parallel. It is hard to separate.

[0018]

However, in the seat having the above structure, when the seat cushion is raised,
The operation performed by the occupant on the lifter operation unit 11 is described in (1)
Smooth operation requires two operations: an operation of grasping the lock release lever 15 to release the lock, and (2) an operation of lifting the lifter lever 13 in the upper right direction in FIG. 20 with the lock release lever 15 grasped. And the operability is poor.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a sheet having good operability. Another object of the present invention is to provide a seat capable of reducing the number of components.

[0020]

[Means for Solving the Problems]

[1] The invention according to claim 1, wherein the seat has a link mechanism for moving the seat cushion in the vertical direction with respect to the floor side, and a lock mechanism for inhibiting the operation of the link mechanism, and is rotatable toward the seat cushion. A lock release lever for releasing the lock of the lock mechanism by pulling up the operation unit; and a lock release lever rotatably provided on the seat cushion side, connected to the link mechanism, and pulled up in the lock release direction. A lifter plate for driving the link mechanism in a direction in which the seat cushion is lifted by being pushed by a lock release lever.

When raising the seat cushion to the floor, first, the lock release lever is pulled up to release the lock of the link mechanism. Further, when the lock release lever is pulled up, the lifter plate is pushed by the lock release lever, and the link mechanism is driven in the direction in which the seat cushion moves up and down.

According to such a structure, the lock release of the link mechanism and the raising of the seat cushion can be smoothly performed only by operating the lock release lever in the lock release direction, so that the operability is good.

[2] The invention according to claim 2 In the invention according to claim 1, the lock release lever and the lifter plate are provided on the same axis.

By providing them on the same axis, only one hinge pin is required, and the number of components can be reduced. [3] The invention according to claim 3 In the invention according to claim 1, the rotation axis of the lock release lever and the rotation axis of the lifter plate are provided at different places.

Since the movement at the time of unlocking is different from the movement at the time of raising the seat cushion, the operator can easily determine what is being done now.

[0026]

Embodiments of the present invention will now be described with reference to the drawings. First, the overall configuration of a seat according to the present embodiment will be described with reference to FIG. 2 illustrating a main part of the seat according to the embodiment of the present invention and FIG. 3 illustrating a back surface in FIG.

In this embodiment, the description will be made using the main part mechanism on one side, but a similar mechanism is also provided on the other side, and the operating force to one side is transmitted using a transmission means. And transmitted to the mechanism on the other side.

In these figures, reference numeral 21 denotes a seat slide mechanism comprising a lower rail 22 fixed to the floor side and an upper rail 23 slidably engaged with the lower rail 22.

A lower arm 24 is provided to the upper rail 23 via a seat cushion angle elevating mechanism 25 and is attached to the seat cushion frame.
Is a ratchet plate provided on the lower arm 24 via the reclining mechanism 27 and attached to the upper arm attached to the seat back frame.

Next, the lower rail 2 of the seat slide mechanism will be described with reference to FIG.
2 and the cross-sectional shape of the upper rail 23 will be described. The lower rail 22 has a base portion 34 provided substantially parallel to the floor.
A first side wall 35 bent from one end of the base 34 and extending away from the floor; and a first side wall 35 bent from the other end of the base 34 and extending away from the floor. And a second side wall portion 36 having substantially the same length as the first side wall portion 35.
From the upper end of the first side wall portion 35, the first side portion is bent substantially parallel to the base portion 34 and extends in the direction of the second side wall portion 36.
From the upper end of the top portion 37 and the second side wall portion 36, is bent substantially parallel to the base portion 34, extends toward the first side wall portion 35, and is substantially the same as the first top portion 37. Second crown 38 of length
A first hanging portion 39 bent from the other end of the first top portion 37 toward the base portion 34 and shorter in length than the first side wall portion 35, and the other of the second top portion 38 Is bent in the direction of the base 34 from the end of the second hanging part 40 and faces the first hanging part 39 via the space S, and has a second hanging part 40 having substantially the same length as the first hanging part 39.
It consists of

On the other hand, the upper rail 23 is composed of a first upper rail 42 and a second upper rail 43. The first upper rail 42 includes a first base 44 inserted into the lower rail 22 through a space S formed between the first hanging part 39 and the second hanging part 40 of the lower rail 22,
A first extending portion 46 extending from the first base portion 44 and extending to a space S1 formed by the first side wall portion 35, the first top portion 37, and the first hanging portion 39 of the lower rail 22; Consists of

On the other hand, the second upper rail 43 has a second base 45 inserted into the lower rail 22 through a space S formed between the first hanging part 39 and the second hanging part 40 of the lower rail 22. And a second extension portion extending from the second base portion 45 and extending to a space S2 formed by the second side wall portion 36, the second top portion 38, and the second hanging portion 40 of the lower rail 22. 47.

Further, the first base 44 of the first upper rail 42 and the second base 45 of the second upper rail 43 are fixed and integrated. Next, the cutting line H- in FIG.
The locking mechanism of the seat slide mechanism 21 will be described with reference to FIGS.

The first hanging portion 39 of the lower rail 22, the second
A plurality of lock projections 41 are formed on one of the hanging portions 40 of the first rail 39 in this embodiment along the longitudinal direction of the lower rail 22.

In the upper rail 23, the first base 44 of the first upper rail 42 and the second upper rail 4
A space S3 is formed between the third base 45 and the third base 45 along the longitudinal direction of the upper rail 23.

In this space S3, a lock lever 50 is provided so as to be rotatable in a vertical direction by using a pin 49. The lower part of one end of the lock lever 50 is bent horizontally to form a lock hole 50 a that can be engaged with the lock projection 41. The upper part of one end of the lock lever 50 is bent in the horizontal direction, and the second upper rail 4
A projection 50b is formed to project outside through a first hole 43a formed in the third hole 3a. One end is locked by a pulling locking portion 42a formed by bending the upper portion of the first upper rail 42, and the other end is locked by a lock lever 50.
The lock lever 50 is urged in the direction in which the lock hole 50a engages with the lock protrusion 41 by the urging force of the spring 54 locked to the protrusion 50b.

The other end of the lock lever 50 has a first upper rail 42 formed on the first upper rail 42 of the upper rail 23.
And curling portions 50c, 50d protruding to the outside via the second holes 42b, 42c. And
A handlebar 51 that connects the lock levers of the outer and inner seat tracks is engaged with the curling portions 50c and 50d.

Then, as shown in FIG. 15, which is a cross-sectional view taken along a cutting line MM in FIG. 2, the first extension 37 of the first rail 37, the first side wall 35, and the first upper rail 42 of the lower rail 22. A steel ball 60 arranged between the protrusions 46,
A steel ball 61 disposed between the second top portion 38, the second side wall portion 36, and the second extension portion 47 of the second upper rail 43 of the lower rail 22, the base portion 34 of the lower rail 22, and the first upper rail The roller 6 disposed between the first extension portion 46 of the second and the second extension portion 47 of the second upper rail 43
2 and the upper rail 23 is a lower rail 22 without any backlash.
To slide against.

Next, the reclining mechanism 27 will be described with reference to FIG. 18, which is a view for explaining the reclining mechanism in FIGS. 2, 3, 15, and 3. FIG. Lower arm plates 71 and 72 are fixed to the lower arm 24 with the ratchet plate 26 interposed therebetween.

Numeral 73 designates a hinge pin through which the ratchet plate 26 and the lower arm plates 71, 72 are inserted, and which supports the upper rail side (the ratchet plate 26) rotatably with respect to the lower arm side (the lower arm plates 71, 72).

The lower part of the upright wall surface of the concave portion 26a of the ratchet plate 26 has a cylindrical surface centered on the hinge pin 73, and has internal teeth 26b formed therein. Further, in the recess 26a of the ratchet plate 26, a pole 7 having external teeth 74a which can be meshed with the internal teeth 26b is formed.
4 are provided.

The lower arm plate 72 is formed with guides 72a, 72 formed by half blow processing or the like.
With b, the pawl 74 is guided in the radial direction of a circle centered on the hinge pin 73.

Also, the recess 26 of the ratchet plate 26
On a, a cam 75 is provided rotatably on the hinge pin 73 and can press the back of the pawl 74. 7
Reference numeral 6 denotes a reclining handle rotatably attached to the hinge pin 73.

The lower arm plate 72 and the reclining handle 76 are formed with long holes 72c and 76a, and the pins 77 provided on the pole 74 are loosely fitted in the long holes 72c and 76a. 78 is a pin 77
Is a ring for retaining that is attached to the tip of the.
The elongated holes 72c and 76a are set in such a shape that the pawl 74 engages with and separates from the internal teeth 26b of the latch plate 26 when the reclining handle 76 rotates.

Further, the cam 75 has a bent portion 75b which engages with a hole (not shown) formed in the lower arm plate 72 and a hole 76b formed in the reclining handle 76.
As shown in FIG. 15, the hinge pin 73 is formed.
Is connected to a connecting pipe 79 connected to the hinge pin of the reclining mechanism on the other side.
Reference numeral 78 denotes a hook plate fixed to the connecting pipe 79, and a hole 71 formed in the lower arm plate 71.
a, and engages with a hole 75a formed in the cam 75,
The movement of the reclining handle 76 is transmitted to the connecting pipe 79.

A slit 73a is formed at the tip of the hinge pin 73, and the slit 73a has a first slot.
The outer end of the first spiral spring 81, to which the inner ends of the second spiral springs 81, 82 are locked, is locked to a stopper plate 80 fixed to the upper part of the ratchet plate 26, and the upper arm ( (Seat back) in the forward leaning direction. The outer end of the second spiral spring 82 has a reclining handle 76
, And urges the reclining handle 76 so that the reclining mechanism 27 is locked.

Next, a description will be given of the seat cushion angle-elevating mechanism 25 mainly with reference to FIG. 16 illustrating the seat cushion angle-elevating mechanism in FIG. In the figure, 1
Reference numeral 00 designates one end portion disposed in a space formed between the first and second upper rails 42 and 43 of the upper rail 23 (floor side), and rotatably mounted by using a pin 101. The first part is rotatably mounted on one side using a pin 102 at the rear of the lower arm 24.
(See FIG. 13 which is a cross-sectional view taken along section line KK in FIG. 2).

Reference numeral 103 denotes one end of the first link 10
0 is a second link rotatably attached to the other end side using a pin 104. 105 is disposed between the lower arms 24 on both sides, a middle portion is fixed to a connecting pipe 106 rotatably provided with respect to the lower arms 24 on both sides, and a second link 103 is provided on one end side.
Is an oscillating link rotatably mounted using a pin 107 at the other end.

Reference numeral 108 denotes one end of the swing link that is rotatably attached to the other end using a pin 109, and the other end of the swing link rotates using a pin 110 on the upper rail 13 (floor side). A third link, possibly attached.

Therefore, the lower arm 24 is connected to the upper rail 23 by the first link 100 and the second link 10.
3, supported by a link mechanism including a swing link 105 and a third link 108.

Next, the structure of the lock mechanism of the seat cushion angled elevating mechanism 25 will be described with reference to FIG. The first link 100 is formed with arc-shaped teeth 100 a around the pin 101.

Reference numeral 111 denotes a rotatably mounted pin formed in a space formed between the first and second upper rails 42 and 43 on the upper rail 23 (floor side) by using a pin 112, and a tooth 100a of the first link 100. The lock member is formed with teeth 111a that are disengaged from the lock member. A lock member 113 is rotatably attached to the space formed between the first and second upper rails 42 and 43 on the upper rail 23 (floor side) using a pin 114, and is rotatably provided on the upper rail 23. A cam capable of pressing the back of the cam 111. In addition, the lock member 111 includes:
An engaging portion 111b with which the cam 113 can be engaged is formed, and when the cam 113 rotates clockwise in FIG.
It moves in a direction away from 00a.

Reference numeral 115 denotes a transmission lever rotatably mounted on the pin 114 and having two rotating ends. A hole 115a is formed at one rotation end of the transmission lever 115. As shown in FIG. 13, the cam 113 has a bent portion 113a which is inserted through a hole 42d formed in the first upper rail 42 and is engaged with a hole 115a of the transmission lever 115.
Are formed.

The cam 11 is moved through the transmission lever 115 by a spring 116 whose one end is engaged with the upper rail 23 and the other end is engaged with the transmission lever 115.
Reference numeral 3 is urged in a direction to press the back of the lock member 111.

The connecting pipe 1 is connected to the pin 101.
The connecting pipe 120 is provided with an arm 121 having a groove 121a formed at the end thereof. The pin 122 provided at the other rotating end of the transmission lever 115 is inserted into the groove 121 of the arm 121.
a, the movement of the transmission lever 115 is controlled by the transmission lever of the brake mechanism of the seat cushion angled elevating mechanism on the other side.

Next, as shown in FIG. 10, which is an exploded perspective view for explaining a main part of the sheet of one embodiment of the present invention, which is a sectional view taken along a cutting line GG in FIG. 1, FIG. 3, and FIG. ,
A bearing 131 for rotatably holding the shaft 130 is attached to the lower arm 24. A lifter plate 132 is attached to a spline portion 130a formed at one end of the shaft 130. A lock release lever 133 is rotatably attached to the shaft 130. The lifter plate 132 has
An upright wall portion 132a is formed on which the lock release lever 133 can contact. Note that a handle 136 as an operation unit is attached to the lock release lever 133 using a screw 135.

140 is a tubular outer cable 14
0a and an inner cable 140b inserted through the outer cable 140a. The outer cable 140a at one end of the cable 140 is locked to the lifter plate 132, and the inner cable 140a is
b is locked by the lock release lever 133.

The cable 140 is inserted through a hole 23a formed in the upper rail 23. As shown in FIG. 2, the outer cable 140a at the other end is locked by a cut-and-raised portion 24a formed on the lower arm 24. The inner cable 140b is locked on the transmission lever 115. Therefore, when the lock release lever 133 is operated and rotated,
This rotational force is transmitted to the transmission lever 115 via the cable 140.
Will be transmitted to

One end of the link 145 is fixed to the other end of the shaft 130 by caulking or the like. One end of the link 147 is rotatably attached to the other end of the link 145 using a pin 146. The other end of the link 147 is rotatably attached to the swing link 105 by using a pin 148 (see also FIG. 9 which is a cross-sectional view taken along section line FF in FIG. 2).

Next, as shown in FIGS. 2 and 7, which are sectional views taken along the section line DD in FIG. 2, and FIGS. 8 and 16 which are sectional views taken along the section line EE in FIG. A bracket 150 having two grooves 150a and 150b is fixed, one end of which is locked in a hole 108a formed in the third link 108, engages with the groove 108b, and engages with the groove 150a of the bracket 150. And groove 1
The third link 108 is urged in a direction in which the third link 108 is raised, that is, in a direction in which the lower arm 24 (seat cushion) rises, by a torsion spring 151 as an urging means locked to 50b.

As shown in FIG. 12, which is a cross-sectional view taken along section line JJ of FIG. 2, the rear portion of the seat cushion frame 162 is provided at the rear portion of the lower arm 24. It is rotatably attached to the bracket 160 using a pin 161, and the front portion is attached to the lower arm 24 via a seat cushion front elevation mechanism 170 which will be described below.

Next, in FIG. 2, FIG. 3, FIG. 4, and FIG.
The seat cushion front elevation mechanism 170 will be described with reference to FIG. 5 which is a cross-sectional view of FIG. 5B and FIG. 6 which is a cross-sectional view taken along a section line CC of FIG.

A connecting pipe 180 is rotatably mounted between the front parts of the lower arms on both sides. 1
Reference numeral 81 denotes a lift arm having an intermediate portion fixed to the connecting pipe 180. A plurality of teeth 181a are formed in an arc shape on one rotation end side of the lift arm 181. Further, one end of a link 183 is rotatably attached to the other rotating end of the lift arm 181 using a pin 182. A seat bracket 185 is rotatably attached to the other end of the link 183 using a pin 184. The seat bracket 185 is attached to the seat cushion frame 162.

Reference numeral 190 denotes a lock member rotatably attached to the lower arm 24 using a pin 191 and having a tooth 190a which can be engaged with and disengaged from a tooth 181a of the lift arm 181. A cam 192 is fixed to a shaft 193 rotatably provided on the lower arm 24 and can press the back of the lock member 190. The lock member 190 has an engagement portion 190b with which the cam 192 can be engaged. 194 has one end locked to the lower arm 24 and the other end locked to the cam 192, and connects the cam 192 to the locking member 1.
90 is a spring that urges the back portion 90 in the direction of pressing.

Further, a lift handle 195 is fixed to the shaft 193. 196 is pin 19
1 and a cover plate that engages with the shaft 193 and covers the lock member 190 and the cam 192.

The connecting pipe 180 has
Bracket 200 having two grooves 200a, 200b
Is fixed, one end is locked in the hole 24b of the lower arm 24, the hole 24c of the lower arm 24 is engaged, the groove 200a of the bracket 200 is engaged, and the torsion spring 201 is locked by the groove 200b. 2, the lift arm 181 fixed to the connecting pipe 180 is urged in the clockwise direction in FIG. 2, that is, the direction in which the seat bracket 185 (seat cushion) rises.

Next, the operation of the above configuration will be described. (1) Seat slide (see FIG. 17) In FIG. 7, when the handlebar 51 is lifted upward against the urging force of the spring 54, the lock lever 50 rotates clockwise about the pin 49, and the lock hole 50a The engagement between the lower rail 22 and the lock projection 41 is released, and the upper rail 23 is slidable with respect to the lower rail 22. When the upper rail 23 is moved to a desired position and the operating force on the handlebar 51 is released, the lock lever 50 is rotated counterclockwise by the urging force of the spring 54, and the lock hole 50a of the lock lever 50 is rotated.
And the lock projection 41 of the lower rail 22 are engaged, and the sliding of the upper rail 23 is prohibited.

Since the handlebar 51 is also connected to the lock lever 50 on the other side, the seat slide mechanism on the other side performs the same operation. (2) Reclining (see FIG. 18) When the reclining handle 76 is lifted upward (rotated counterclockwise in FIG. 18) against the urging force of the second spiral spring 82, the back of the pole 74 of the cam 75 Is released, the pawl 74 separates from the internal teeth 26b of the ratchet plate 26, and the ratchet plate 26 enters an "unlocked state" in which the ratchet plate 26 can rotate around the hinge pin 73.

When a desired reclining angle is obtained, the operating force on the reclining handle 76 is released, and the reclining handle 76 is rotated clockwise in FIG. 18 by the urging force of the second spiral spring 82. , The cam 75 presses the back of the pole 74,
The external teeth 74a of the pawl 74 move in a direction in which the external teeth 74a mesh with the internal teeth 26b of the ratchet plate 26, and enter a "locked state" where rotation of the ratchet plate 26 (seat back, upper arm) is prohibited.

The movement of the reclining handle 76, as shown in FIG.
8. It is also transmitted to the reclining mechanism on the other side via the connecting pipe 79. (3) Elevating with Seat Cushion Angle In FIG. 3, when the occupant lifts the hips from the seat cushion and lifts (turns counterclockwise) the lock release lever 133, first, the inner cable 140b of the cable 140 is pulled. As shown in FIG. 16, the transmission lever 115 rotates clockwise against the urging force of the spring 116. The rotation of the transmission lever 115 causes the cam 11
3 also rotates clockwise, and the cam 113
Engaging with the first engaging portion 111b, the lock member 111 rotates counterclockwise, and the engagement between the teeth 111a of the lock member 111 and the teeth 100a of the first link 100 is released.

Therefore, with respect to the upper rail 23, the first
Link 100, second link 103, swing link 105
The lower arm 24 supported via a link mechanism including the third link 108 is movable in the vertical direction.

When the lock release lever 133 is further lifted, the lock release lever 133 is lifted.
2 and riser plate 132
Press to rotate. Then, the lifter plate 13
Shaft 130, shaft 1 splined with 2
The swing link 105 rotates in a direction to lift the lower arm 24 through a link 145 fixed to the link 30 and a link 147 rotatably attached to the link 145, and the lower arm 24 (seat cushion) has a front side on a rear side. Perform an angled elevation that raises less.

In the present embodiment, the lower arm 2
4 is biased upward by the biasing force of the torsion spring 151, so that the seat cushion can be raised with a small operating force.

When the height has been raised to the desired height, the operating force on the lock release lever 133 is released, and the teeth 111a of the lock member 111 are moved to the teeth 1 of the first link 100.
00a, and the movement of the link mechanism including the first link 100, the second link 103, the swing link 105, and the third link 108 is prohibited.

The movement of the transmission lever 115 depends on the arm 1
21, transmitted to the transmission lever on the other side via the connecting pipe 120. Conversely, when lowering the position of the seat cushion, the seat cushion is released by operating the lock release lever 133 to release the locked state of the link mechanism as described above, due to the weight of the occupant.
Perform an angled descent. (4) Lifting and lowering the front of the seat cushion When the seated person is lifted from the seat cushion, the lift handle 195 is rotated counterclockwise in FIG.
Is rotated clockwise in FIG.
3, the lock member 190 rotates counterclockwise in FIG.
0a is disengaged from the teeth 181a of the lift arm 181 and the lift arm 181 is rotatable.

Since the urging force of the torsion spring 201 gives the seat bracket 185 an urging force in the direction of raising the seat cushion, the seat cushion is centered on the pin 161 of the bracket 160 (see FIG. 12). Move up. That is, only the front part of the seat cushion moves upward.

When the front of the seat cushion has moved to a desired height, the operating force on the lift handle 195 is released. Then, the teeth 190a of the lock member 190 mesh with the teeth 181a of the lift arm 181, and the elevation of the front portion of the seat cushion is prohibited.

The other front seat cushion lifting mechanism does not have a lock mechanism for inhibiting the rotation of the lift arm 181, and the lift arm 181 is moved via the connecting pipe 180 to which the lift arm 181 is fixed. Transmitted.

Conversely, when lowering the position of the front portion of the seat cushion, the lift handle 195 is operated to release the locked state of the link mechanism in the same manner as described above, so that the seat cushion is released due to the weight of the seated person. The front of
Descend.

According to the above configuration, when raising the seat cushion, the lock mechanism can be unlocked and the seat cushion can be smoothly lifted simply by operating the unlock lever 133 in the unlocking direction. Is good.

Further, the lock release lever 133 and the lifter plate 132 are coaxially arranged,
, Only one shaft (hinge pin) is required, and the number of components can be reduced.

Further, in the present embodiment, a large empty space is generated between the first link 100 and the swing link 105 and the third link 108, so that the space is saved. It becomes easy to provide another mechanism.

The present invention is not limited to the above embodiment. For example, as shown in FIG. 19, the rotation axis of the lock release lever 133 may be a shaft 300 different from the shaft 130 that is the rotation axis of the lifter plate 132.

In this case, since the movement at the time of releasing the lock of the link mechanism is different from the movement at the time of raising the seat cushion, the operator can easily determine what is being performed now.

[0085]

As described above, according to the first aspect of the present invention, it is provided rotatably on the seat cushion side,
A lock release lever that releases the lock of the lock mechanism by pulling up the operation unit, and a lock release lever that is rotatably provided on the seat cushion side and that is connected to the link mechanism and pushed by the lock release lever that is pulled up in the lock release direction. With a lifter plate that drives the link mechanism in the direction in which the seat cushion rises, the lock mechanism can be unlocked and the seat cushion lifted smoothly simply by operating the lock release lever in the unlock direction. Operability is good because it can be performed.

According to the second aspect of the present invention, since the lock release lever and the lifter plate are provided on the same axis, only one hinge pin is required, and the number of components can be reduced.

Further, according to the third aspect of the present invention, since the rotation axis of the lock release lever and the rotation axis of the lifter plate are provided at different places, the movement at the time of unlocking the link mechanism and the seat cushion can be improved. Since the movement at the time of raising is different, the operator can easily determine what is being done now.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a main part of a sheet according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a main part of a sheet according to an embodiment of the present invention.

FIG. 3 is a rear view in FIG. 2;

FIG. 4 is a sectional view taken along section line AA in FIG. 2;

FIG. 5 is a sectional view taken along section line BB in FIG. 2;

FIG. 6 is a sectional view taken along section line CC of FIG. 2;

FIG. 7 is a sectional view taken along section line DD in FIG. 2;

FIG. 8 is a sectional view taken along section line EE in FIG. 2;

FIG. 9 is a sectional view taken along section line FF in FIG. 2;

FIG. 10 is a sectional view taken along section line GG in FIG. 2;

FIG. 11 is a sectional view taken along section line HH in FIG. 2;

FIG. 12 is a cross-sectional view taken along section line JJ in FIG. 2;

FIG. 13 is a sectional view taken along section line KK of FIG. 2;

FIG. 14 is a sectional view taken along section line LL in FIG. 2;

FIG. 15 is a sectional view taken along a cutting line MM in FIG. 2;

FIG. 16 is a diagram illustrating a seat cushion angled elevating mechanism in FIG. 2;

FIG. 17 is a diagram illustrating a seat slide mechanism in FIG. 2;

FIG. 18 is a diagram illustrating a reclining mechanism in FIG. 3;

FIG. 19 is a main part configuration diagram of another embodiment.

FIG. 20 is a configuration diagram illustrating an example of a conventional seat in which a seat cushion moves in a vertical direction.

FIG. 21 is a view for explaining a lift lever in FIG. 20;

[Explanation of symbols]

 24 Lower arm 132 Lifter plate 133 Lock release lever 136 Handle

Claims (2)

[Claims] 1. A seat having a link mechanism for moving a seat cushion in a vertical direction with respect to a floor side and a lock mechanism for prohibiting the operation of the link mechanism. A lock release lever that releases the lock of the lock mechanism by pulling up a portion, and the lock release lever that is rotatably provided on the seat cushion side, is connected to the link mechanism, and is pulled up in the lock release direction. A lifter plate that, when pressed, drives the link mechanism in a direction in which the seat cushion rises. 2. The seat according to claim 1, wherein the lock release lever and the lifter plate are provided on the same axis. 3. The seat according to claim 1, wherein a rotation axis of the lock release lever and a rotation axis of the lifter plate are provided at different places.