JPH0566124B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an adjustment device for side supports and lumbar supports of a vehicle seat.

(Prior art) Conventionally, a mounting base is provided at a desired part of a skeleton frame provided in the backrest seat, a rotating shaft E is attached to the mounting base, and a side support adjustment dial B is fixed to one end of the rotating shaft E. A threaded portion F is carved on the other end of the rotating shaft E, a side support moving member G is screwed onto the threaded portion F, and a lumbar support adjustment dial A and a cam D are attached to the rotating shaft E.
The adjustment device for the side support and lumbar support of a vehicle seat, in which the cam D is fixed to the outer periphery of a bush C which is mounted on the outer periphery of the rotating shaft E, is well known.

(Problem to be Solved by the Invention) In the known example, since the cam D is fixed to the outer periphery of the bushing C mounted on the outer periphery of the rotating shaft E, a load is applied to the shaft E of the side support. If the shaft E were to bend, it would interfere with the rotation of the shaft E and the bush C, and there would be a problem in that the rotation of the lumbar support adjustment dial A or the cam D would become difficult.

(Means for Solving the Problems) Therefore, the present invention provides a mounting base 21 at a desired portion of the skeleton frame 18 provided in the backrest seat 16, and the mounting base 21 has a rotary shaft 3 that can only rotate freely. A side support adjustment dial 2 is fixed to one end of the rotating shaft 3, a threaded portion 4 is carved on the other end of the rotating shaft 3, and a side support adjusting moving member 5 is screwed into the threaded portion 4. , the lumbar support adjustment dial 9 and the cam 13 are rotatably attached to the rotating shaft 3, and when the lumbar support adjustment dial 9 is rotated between the cam 13 and the lumbar support adjustment dial 9, the cam 13 is rotated.
rotates and the lumbar support adjustment dial 9
A vehicle seat is provided with a rotation transmission reversal prevention mechanism L that prevents the cam 13 from reversing when the cam 13 is stopped, and the cam 13 is a vehicle seat rotatably provided on the outer periphery of a bush 58 provided on the outer periphery of the rotating shaft 3. This is an adjustment device for the side support and lumbar support.

(Embodiment) To explain the improvements of the present invention, as shown in FIG. Then, the side support adjustment moving member 5 is screwed onto the threaded portion 4, a bush 58 is rotatably mounted on the outer periphery of the rotating shaft 3, a cam 13 is rotatably mounted on the outer periphery of the bush 58, and the cam 13 is rotatably mounted on the outer periphery of the bush 58. Lumbar support adjustment dial 9 freely rotatable on shaft 3
and the cam 13, a latch 12 formed on a part of the cam 13, and a latch 1 engaged with the latch 12.
0 and provided on the outer periphery of the bush 58, and an engagement protrusion 7 that engages with a lumbar support adjustment dial 9 formed on the rotary member 6. Even if the rotating shaft 3 bends due to a load applied to the side support 1, the outer peripheral surface of the bush 58 does not bend, so the rotating member 6 and the cam 13 can be rotated very lightly.

To explain the specific structure of the embodiment of the present invention with reference to the drawings, FIG. 3 is a perspective view of the vehicle seat 14, and 15 is a seat sheet of the vehicle seat 14,
1 is a backrest seat of the vehicle seat 14, and 17 is a headrest attached to the upper part of the backrest seat 16.

Side supports 1, 1 are provided on the left and right sides of the seat back seat 16 and are shaped to protrude forward. forms the lumbar support 8.

18 is a skeletal frame provided in the back seat 16, and the skeletal frame 18 is formed by an upper frame 19 formed in a downward U-shape and a lower frame 20 in the left and right direction.
Both the lower frame 20 and the lower frame 20 are formed of hollow pipes or the like.

A mounting base 21 is provided at a desired portion on either the left or right side of the upper frame 19. The mounting base 21 is formed in a U-shape when viewed from the front, and a substantially vertical vertical shaft 23 is attached to the inner rear position of the flange portion 22 provided in parallel above and below the mounting base 21. 2
3, the base of the rotation plate 24 is pivotally attached. A lumbar plate 26 is attached to the tip side of the rotating plate 24 via a U-shaped arm 25.

A vertical shaft 28 parallel to the vertical shaft 23 is mounted on the flange portion 22 on the front side of the portion to which the vertical shaft 23 is mounted, and a link plate 29 in the left and right direction is mounted on the vertical shaft 28.
Attach the center part to the shaft.

The front end of a spring 30 whose rear end is locked to the rotating plate 24 is locked to the inner end of the link plate 29, and the outer end of the link plate 29 has an abutting member 31 made of synthetic resin or the like. and the corresponding contact member 31 is brought into contact with the outer peripheral surface of the cam 13.
The spring 30 urges the link plate 29 about the vertical axis 28 so that the abutting member 31 is always in contact with the outer peripheral surface of the cam 13.

Therefore, on the inner surface of the vertical wall 32 of the mounting base 21, there are brackets 33, 3 formed of channel steel.
3. Fix the outer surface of each bracket 3.
A flat bearing plate 34 and a U-shaped guide bracket 35 are attached to the inner surfaces of each of the bearings 3 and 33 by bolts 36.

A large diameter portion 37 is formed approximately at the center of the rotating shaft 3, and the threaded portion 4 is formed in the portion of the rotating shaft 3 inside the large diameter portion 37, and the threaded portion 4 is provided with a side support adjustment moving member 5. screw together. Therefore,
The side support adjustment moving member 5 is connected to the rotating shaft 3.
It moves left and right by rotation of . In this embodiment, the side support adjusting movable member 5 is formed into a bar shape that is long in the vertical direction, and both upper and lower ends of the side support adjusting movable member 5 are formed on the upper and lower walls 38, 38 of the guide bracket 35, respectively, which are long in the left and right direction. The links 40, 40 are made to protrude in the vertical direction from the long holes 39, 39, and one end of the links 40, 40 is attached to the protruding portion with screws 41, 41.
Only rotation can be fixed freely.

42 is the frame body of the left side support 1;
The frame body 42 is for rotating the cushion material in the left side support 1 in the left-right direction, and is formed of a hollow pipe, and the upper part thereof is formed in a dogleg shape. The upper end of the frame 42 is bent rearward, and the rear end is rotatably attached to a bearing 43 with a pin 44. The lower part of the frame body 42 is formed into a linear rod-shaped portion 45, and the front end portions of arms 46, 46 are fixed to the rod-shaped portion 45 at a predetermined interval. arm 46,
The other end of each of the links 40, 40 is pivotally attached to the rear end of the link 46 by a pin 47. Frame body 42
The lower end of the rod-shaped portion 45 is bent rearward to form a bent portion 48, and the center portion of the bent portion 48 is rotatably attached to a bearing 49 provided on the lower frame 20 with a pin 50. One end of a connecting rod 51 is pivoted to the rear end of the bent portion 48.

52 is the frame body of the right side support 1;
The upper end of the frame 52 is pivotally attached to a bearing 53 provided on the upper frame 19 with a pin 54 . The lower end portion of the frame body 52 is also bent rearward to form a bent portion 55, and the rear end portion of the bent portion 55 is pivotally attached to a bearing 56 provided on the lower frame 20 by a pin 57. The other end of the connecting rod 51 is pivoted to the bent portion 55 located above the pin 57. Preferably, the length from the pin 50 of the bent portion 48 of the frame body 42 to the shaft attachment portion of the connecting rod 51 and the length of the bent portion 5 of the frame body 52 are
The lengths from the pin 57 of No. 5 to the shaft attachment portion of the connecting rod 51 are made equal.

The large diameter portion 37 of the rotating shaft 3 is surrounded by a bush 58, and the rotating member 6 is attached to the outer peripheral surface of the bush 58.

The rotating member 6 is formed into a substantially circular shape by a flat plate,
A left-right insertion hole 59 is formed in the center portion thereof, and a cylindrical portion 60 is formed around the insertion hole 59 so as to protrude outward. . The rotating member 6 is attached so that the rotating shaft 3 is inserted through the insertion hole 59 and only the cylindrical portion 60 is in contact with the rotating shaft 3. Engaging protrusions 7, 7 extending in the left and right direction are formed on the outer peripheral edge of the rotating member 6. The engaging protrusions 7, 7 protrude outward and are formed parallel to each other and facing each other.
The engaging protrusions 7, 7 are inserted into the insertion holes 6 formed in the mounting base 21.
1 and engages with the engagement hole 62 of the lumbar support adjustment dial 9 of the lumbar support 8.

Thus, a protruding piece 63 is formed on the outer peripheral edge of the rotating member 6 and protrudes in the radial direction, and the ratchet 10 is attached to the protruding piece 63. The latch 10 engages with the engagement surface of a latch 12 integrally formed with a cam 13 attached to the outer circumferential surface of the bush 58. 64 is a spring wound around the rotating shaft 3;
The latch 10 is always biased to engage the latch 12. 65 is washia.

(effect) Next, we will discuss the effect.

A. Adjusting the side support Manually rotate the side support adjustment dial 2 to the right. The rotating shaft 3 rotates clockwise, and the side support adjustment moving member 5 screwed into the threaded portion 4 of the rotating shaft 3 moves leftward within the elongated hole 39 of the guide bracket 35. Side support adjustment moving member 5
One end of the links 40, 40 is attached to both the upper and lower ends of the side support adjustment moving member 5, and the other end of the link 40, 40 is pivoted to the arms 46, 46 fixed to the frame 42. moves to the left, links 40, 40 move arms 46, 46
Pushing the rear end, the frame body 42 is pressed against the pin 4.
4 and pin 50 in the direction of arrow A.

Since the connecting rod 51 is pivotally attached to the rear end of the lower bent portion 48 of the rod-shaped portion 45 of the frame 42, the connecting rod 51 is pulled in the direction of the arrow B opposite to the frame 42. And the connecting rod 51
The other end of the connecting rod 51 is pivoted above the pin 57 that pivots the bent portion 55 of the frame 52 of the right side support 1.
Pull the bent portion 55 of No. 2 in the direction of arrow C, and remove the frame 52.
is rotated around pins 54 and 57. Therefore, the horizontal width of the side support 1 can be reduced. Also, on the contrary, side support 1
To increase the width, just turn the side support adjustment dial 2 in the opposite direction.

B Adjustment of Lumbar Support When the lumbar support adjustment dial 9 is manually rotated, the engagement protrusion 7 of the rotating member 6 engages with the engagement hole 62 of the lumbar support adjustment dial 9, and the rotating member 6 is connected to the rotating shaft. 3 through the insertion hole 59
, the rotating member 6 rotates around the rotating shaft 3. A latch 10 is attached to the projection 63 of the rotating member 6, and the latch 10 engages a latch 12 formed integrally with the cam 13 attached to the outer peripheral surface of the bush 58, so that the rotating member 6 is not rotated. Then ratchet 10 becomes latch 1
2 rotates the cam 13 formed integrally with the latch 12. Therefore, since the link plate 29 in contact with the cam 13 rotates about the vertical axis 28 so as to pull the spring 30, the rotating plate 24 is pulled by the spring 30 and rotates about the vertical axis 23. The lumbar plate 26 attached via the U-shaped arm 25 is pushed forward.

Therefore, when a load is applied to the side support 1, such as when sitting on the seat 15 or when driving, the side support adjustment moving member 5 and the rotating shaft 3 are pressed backward or in the left-right direction, and the rotating shaft 3 is However, even if the rotating shaft 3 is curved, the outer peripheral surface of the bush 58 is not curved, and therefore the lumbar support adjustment dial 9 and the cam 13 can be easily adjusted without being affected by the load. The lumbar support adjustment dial 9 can be turned.

(Effects) Conventionally, a mounting base is provided at a desired part of a skeleton frame provided in the backrest seat, a rotating shaft E is attached to the mounting base, and a side support adjustment dial B is fixed to one end of the rotating shaft E. , a threaded portion F is carved on the other end of the rotating shaft E, a side support moving member G is screwed into the threaded portion F, and a lumbar support adjustment dial A and a cam D are attached to the rotating shaft E;
A device for adjusting side supports and lumbar supports in which the cam D is fixed to the outer periphery of a bush C which is mounted on the outer periphery of the rotating shaft E is well known. In the known example, since the cam D is fixed to the outer periphery of the bushing C mounted on the outer periphery of the rotating shaft E, if a load is applied to the shaft E of the side support and the shaft E bends, it will not bend. For example, there was a problem in that the rotation of the shaft E and the bush C was hindered, and the rotation of the lumbar support adjustment dial A or the cam D became heavy.

However, in the present invention, the mounting base 21 is attached to a desired portion of the skeleton frame 18 provided in the backrest seat 16.
A rotary shaft 3 is mounted on the mounting base 21 so as to rotate freely, a side support adjustment dial 2 is fixed to one end of the rotary shaft 3, and a threaded portion 4 is carved on the other end of the rotary shaft 3. The side support adjustment moving member 5 is screwed onto the threaded portion 4, and the lumbar support adjustment dial 9 and the cam 13 are rotatably attached to the rotating shaft 3, and the cam 13 and the lumbar support adjustment dial 9 are connected together. A rotation transmission reversal prevention mechanism L is provided which rotates the cam 13 when the lumbar support adjustment dial 9 is rotated in between and prevents the cam 13 from reversing when the lumbar support adjustment dial 9 is stopped. Since the cam 13 is an adjustment device for the side support and lumbar support of a vehicle seat, which is rotatably provided on the outer periphery of a bush 58 provided on the outer periphery of the rotating shaft 3, the bush 58 is provided on the outer periphery of the rotating shaft 3. 58 is not curved, and therefore, the lumbar support adjustment dial 9 and the cam 13 have the effect that the lumbar support adjustment dial 9 can be turned very easily without being affected by the load at all.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a known example, Fig. 2 is a principle diagram of the present invention, Fig. 3 is a perspective view of the seat, Fig. 4 is a perspective view of main parts, Fig. 5 is a left perspective view of main parts, Fig. 6 is a sectional view, and FIG. 7 is an exploded view. Explanation of symbols, 1...Side support, 2...Adjustment dial for side support, 3...Rotating shaft, 4...Screw part, 5...Moving member, 6...Rotating member, 7...Engaging protrusion, 8...Lumber support, 9...Lumber support adjustment dial, 10...Ratchet, 12...Latch, 13...Cam, 14...Vehicle seat, 15...
Seat sheet, 16...Back seat, 17...Head rest, 18...Skeleton frame, 19...Upper frame, 20...Lower frame, 21...Mounting base, 22...
flange portion, 23...vertical shaft, 24...rotating plate,
25...U-shaped arm, 26...lumbar plate,
28... Vertical shaft, 29... Link plate, 30... Spring, 31... Contact member, 32... Vertical wall, 33...
Bracket, 34... Bearing plate, 35... Guide bracket, 36... Bolt, 37... Large diameter part, 38... Upper and lower walls, 39... Elongated hole, 40... Link, 41... Screw, 4
2... Frame body, 43... Bearing, 44... Pin, 45... Rod-shaped part, 46... Arm, 47... Pin, 48... Bent part, 49... Bearing, 50... Pin, 51... Connection rod, 52... Frame body, 53...Bearing, 54...Pin, 55
...Bent part, 56... Bearing, 57... Pin, 58... Bush, 59... Insertion hole, 60... Cylindrical part, 61... Insertion hole, 62... Engagement hole, 63... Projection piece, 64... Spring, 6
5...Watsiyaa.

Claims (1)

[Claims] 1. A mounting base 21 is provided at a desired portion of the skeleton frame 18 provided in the backrest seat 16, and the mounting base 2
A rotating shaft 3 is attached to the rotating shaft 1 so that it can only rotate freely, a side support adjustment dial 2 is fixed to one end of the rotating shaft 3, and a threaded portion 4 is carved into the other end of the rotating shaft 3. The side support adjustment moving member 5 is screwed together, the lumbar support adjustment dial 9 and the cam 13 are rotatably attached to the rotating shaft 3, and the lumbar support adjustment dial 9 is attached between the cam 13 and the lumbar support adjustment dial 9. The cam 13 is provided with a rotation transmission reversal prevention mechanism L that rotates the cam 13 when the adjustment dial 9 is rotated and prevents the cam 13 from reversing when the lumbar support adjustment dial 9 is stopped. This is an adjustment device for the side support and lumbar support of a vehicle seat, which is rotatably provided on the outer periphery of a bush 58 provided on the outer periphery of the shaft 3.