JP2905858B2 - Front and rear retractable storage device for headless - Google Patents

Description

Description: BACKGROUND OF THE INVENTION (Field of Industrial Application) The present invention relates to a front and rear retractable storage device for a headrest, and a device for tilting a headrest attached to a front seat and a rear seat forward and backward.

(Prior Art) Conventionally, Japanese Patent Application Laid-Open No. 62-125935 discloses a headrest having a vertical stay, a backrest sheet, and a support in which the stay provided at an upper position of the backrest sheet is inserted from above. A tube, a guide member (shoe) fitted to the support tube, vertically moving in the support tube, and fixing a lower end of the stay;
A motor for directly or indirectly moving the guide member up and down, and a cam formed on the upper portion of the support cylinder. When the guide member (shoe) moves upward, the headrest is automatically slid and guided by the cam to automatically move the headrest. Describes a front and rear retractable storage device for a headrest that is tilted forward.

(Problem to be Solved by the Invention) In the headrest forward falling device of the known example, when the guide member (shoe) moves upward, the headrest is slid and guided by the cam so that the headrest falls forward. The problem is that the friction between the gear and the cam surface has a large frictional resistance and requires a considerably strong force. It does not work smoothly with a small horsepower motor, and the sliding contact surface generates an unpleasant sound of squeaky, requiring lubrication. And so on.

(Objects of the Invention) Accordingly, the present invention provides a headrest that operates lightly and smoothly even with a small horsepower motor by operating a link mechanism, does not generate discomfort noises from squeaks, does not require lubrication, and is therefore free from oil contamination. It is a forward falling device.

(Means for Solving the Problems) Accordingly, the present invention provides a backrest sheet 2 having vertical stays 4 provided on a headrest 1 and support cylinders 7 for inserting the stays 4 from above. A guide member 40 fitted to each of the support cylinders 7 to move up and down in the support cylinder 7, and a motor to directly or indirectly move the guide member 40 up and down;
A link rod 42 provided in the support cylinder 7 and having a lower end fixed to the guide member 40 by a second left and right mounting shaft 43, and a lower end provided in the support cylinder 7 and having a lower end provided at an upper end of the link rod 42. (1) a rotating member 44 which is fixed by the left and right mounting shafts 46 and into which the lower end of the stay 4 is inserted, a one-side guide shaft 48 and the other-side guide shaft 49 projecting to the left and right sides from the rotating member 44; The one-side vertical movement groove 12 and the other-side vertical movement groove 15 formed on the side of the support cylinder 7 and engaged with the one-side guide shaft 48 and the other-side guide shaft 49, respectively. A window 28 is formed on the front side of the upper part and allows the stay 4 to fall forward. The positional relationship between the lower second left and right mounting shafts 43 and the upper first left and right mounting shafts 46 is the first left and right upper position. Mounting shaft 46
Is located at a position rearward of the second left and right mounting shafts 43 in the lower position, and when the guide member 40 is moved upward, the stay 4 is automatically retracted forward and backward. Things.

(Embodiment) One embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a headrest provided above a backrest sheet 2 of a front seat or a rear seat. Although illustration is omitted, the headrest 1 is formed by attaching a cushion material around an internal skeleton frame and surrounding the outer periphery of the cushion material with a skin. The upper ends of the downwardly U-shaped stays 4 are fixed to the frame, and the lower ends of the stays 4 project from the lower surface 3 of the headrest 1.

Reference numeral 5 denotes a frame provided in the backrest sheet 2. A mounting plate 6 in the left-right direction is fixed to an upper portion of the frame 5 (FIG. 2). On the left and right sides of the front surface of the mounting plate 6, the stays 4,
4 are provided.

Each support cylinder 7 is formed into a front half cylinder part 8 and a rear half cylinder part 9 so as to be divided into two front and rear parts, and is formed into a vertically long rectangular cylinder shape by combining these from the front and rear sides.

The outer plate 10 of the front half tube portion 8 and the outer plate 11 of the rear half tube portion 9 are vertically long in a state where the front half tube portion 8 and the rear half tube portion 9 are fitted from the front and rear sides. A notch is formed so that the one-side vertical movement groove 12 is formed.

The inner plate 13 of the front half cylinder portion 8 and the inner plate 14 of the rear half cylinder portion 9 are vertically long with the front half cylinder portion 8 and the rear half cylinder portion 9 fitted from the front and rear sides. A notch is formed so that the other-side vertical movement groove 15 is formed. The other side vertical movement groove 15
Is formed to have an inverted L-shape by bending its upper end forward.

The one-side vertical movement groove 12 and the other-side vertical movement groove 15 have the same height position at the upper end, but the lower end position has the other-side vertical movement groove 15 formed lower than the one-side vertical movement groove 12. (Fig. 3).

The upper end of the front plate 16 of the front half cylinder portion 8 is bent forward to form a front bent portion 17 (FIG. 2). A bulging portion 19 protruding rearward is formed on an upper portion of the rear plate 18 of the rear half cylinder portion 9. The bulging portion 19 is formed in an arc shape centered on the upper end portion of the other-side vertical movement groove 15 in a side view,
The upper end of the bulging portion 19 is formed horizontally for positioning (fifth
Figure).

A positioning projection 20 is formed on each of the front and rear surfaces of the front and rear half-cylindrical portions 8 and 9 so as to project in the front and rear direction.
Is engaged with an engagement hole 21 of the attachment plate 6 and an engagement hole 23 of the attachment bodies 22, 22, which will be described later (FIG. 2).

Each support cylinder 7 is mounted on the mounting plate 6 by mounting bodies 22 having a substantially U-shaped cross section. Mounting plate 22, outer plate 24 of 2
A longitudinally elongated guide hole 25 is formed in the support cylinder 7 so as to be aligned with and communicate with the other vertical movement groove 15 (FIG. 2). Mounting body 22, 22
The inner plate 26 is formed with a vertically elongated notch 27 having an open rear side which coincides with the front edge of the one-side vertical movement groove 12 of the support cylinder 7 (FIG. 2).

A window 28 is opened in the upper part of the front surface of each mounting body 22, and the window 28
Is cut off to form a passage groove 29. Each mounting body 22 is fixed to the mounting plate 6 with bolts by holding the support cylinder 7 between the mounting body 6 and the mounting plate 6.

A front cover 30 is provided on the front side of each mounting body 22. The front cover 30 is mounted on the mounting plate 6 with the mounting bodies 22 interposed therebetween.

A space 31 is formed between the mounting plate 6 and the front cover 30 in the front-rear direction, and between the left and right mounting bodies 22, 22. A vertically movable plate 32 that moves is provided (FIGS. 1 and 4).

The vertically moving plate 32 is positioned parallel to the mounting plate 6. The vertically moving plate 32 has a bent portion bulging to the front side having a substantially U-shaped cross section.
33 are formed, and flange portions 34 are formed on both left and right sides of the bent portion 33. The flange portions 34 are vertically movably engaged with the engagement grooves 35 formed in the mounting plate 6 and mounted.

A vertical rack 36 is provided on the inner surface of the bent portion 33. A gear 37 is meshed with the rack 36. A gear case 38 is provided on the rear surface of the mounting plate 6, and an output shaft of the gear case 38 projects forward from the mounting plate 6, and the gear 37 is fixed to the projecting portion. Although not shown, a flexible rotary shaft of a motor provided at a desired position is connected to the gear case 38, and switches for the motor are provided near the driver's seat and the rear seat.

The lower part of the front side of the vertical moving plate 32 supports a vertical moving shaft 39 in the left and right direction. It passes through the vertical movement groove 15 and faces each support cylinder 7 (FIG. 3). Therefore, as described above, the lower end of the other-side vertical movement groove 15 is formed lower than the lower end of the one-side vertical movement groove 12.

At both ends of the vertical movement shaft 39, guide members 40 that move up and down in the support cylinders 7 are attached. The guide member 40 is formed in a quadrangular cross-section in accordance with the cross-sectional shape of the support cylinder 7, and a pair of left and right arms 41 is formed on the upper part of the guide member 40 in the front-rear direction. The lower end of the link rod 42 is inserted between the arms 41 and 41 from below, and is rotatably mounted by a second (lower) left and right mounting shaft 43.

The upper end of the link rod 42 is rotatably mounted between the legs 45, 45 of the rotating member 44 by an upper first left and right mounting shaft 46.

The positional relationship between the second left and right mounting shafts 43 and the first (upper) left and right mounting shafts 46 is smaller than that of the second left and right mounting shafts 43.
Is located on the rear side (FIG. 5).

Each rotating member 44 forms a tubular section 47 having a square cross section corresponding to the sectional shape of the support cylinder 7 above the legs 45, 45.
The stay 4 of the headrest 1 is inserted and fixed in the cylindrical portion 47.

Legs 45, 4 above the stop portion of the first left and right mounting shafts 46
5 includes one side guide shaft 48 and the other side guide shaft 4 projecting sideways.
9 is provided. The guide shafts 48 and 49 are formed by one shaft in the present embodiment, but may be formed separately. One side guide shaft 48
And the other side guide shaft 49 guides the up and down movement of the rotating member 44 by moving up and down in the other side vertical movement groove 15, respectively. Then, the guide shafts 48 and 49 are aligned with the vertical movement grooves 12 and 15.
Abuts on the upper end of the rotating member 44, the rotating member 44 is rotated forward while restricting upward movement of the rotating member 44.

Further, the one-side guide shaft 48 is formed such that the rear side is formed in a semi-circular shape of the flat surface 51 and the flat surface 51 is in contact with the corner 53 of the upper end of the one-side vertical movement groove 12. As a result, the rotating member 44 is erected smoothly (FIG. 13).

A headrest guide 60 is mounted on the upper part of each of the mounting bodies 22. The headrest guide 60 has a flange 61 at the upper part, and a vertical cylindrical part 62 at the lower surface of the flange 61. In the center of the flange 61, a vertical insertion hole communicating with the cylinder 62
63 is formed, and a notch groove 64 in the front-rear direction is formed on the front side of the flange portion 61. A window communicating with the notch groove 64 is provided on the front side of the flange 62.
The stay 4 of the headrest 1 is formed with a notch groove 64.
And rotate through the window 65.

A small diameter portion 66 is formed in the stay 4 of the headrest 1, and the small diameter portion 66 is configured to rotate through the cutout groove 64 and the passage groove 29 of the mounting body 22. The notch groove 64 and the passage groove 29 of the mounting body 22 are formed to have the same width as the small diameter portion 66. Therefore, the flange 61 of the headrest guide 60 is
Is supported in the front-rear direction.

In the case of a rear seat, the mounting plate 6 is connected to the case 30.
Is attached to the front side to make the headrest fall forward, but in the case of a front seat, when the mounting plate 6 is attached so that the case 30 is to the front side and the headrest 1 is made to fall forward, The mounting plate 6 may be mounted so that the case 30 is on the rear side, and the headrest 1 may be configured to fall backward.

(Operation) Next, the operation will be described.

Since the present invention is configured as described above, when the switch provided near the driver's seat or the rear seat is turned on and the motor is rotated forward, the gear 37 is rotated via the transmission mechanism in the gear case 38, and the gear 37 is rotated. Bend 33 of vertical movement plate 32 due to rotation
The vertical movement plate 32 is moved upward through the vertical movement plate 32, and the guide member 40 in the support cylinder 7 is moved upward through the vertical movement shaft 39 (FIG. 6).

The lower ends of the link rods 42 are attached to the upper arms 41, 41 of the guide member 40 by the second left and right mounting shafts 43.
The upper end of the first left and right mounting shaft between the legs 45, 45 of the rotating member 44
46, the guide member 40 is
The pivoting member 44 is moved upward through 42.

On the left and right side plates of the support cylinder 7, a one-side vertical movement groove 12 and the other-side vertical movement groove 15 are formed.
Since the guide shafts 48 and 49 are engaged, the vertical movement plate 32 further moves upward, and when the rotating member 44 reaches the front rotation start height, the guide shafts 48 and 49 move to the vertical movement grooves 12, At the same time, the upper end of the rotary member 44 comes into contact with the upper end of the rotary member 15, and the upward movement of the rotating member 44 stops.

In this state, the vertically moving plate 32 further moves upward, and the guide member 40
Moves the rotating member 44 further upward by the link rod 42, and a first left and right mounting shaft 46 for attaching the link rod 42 to the rotating member 44.
Is located behind the second left and right mounting shaft 43, the force for moving the guide member 40 upward is
The first left and right mounting shafts 46 are rotated rearward about the guide shafts 48 and 49 (FIG. 13).

Therefore, the rotating member 44 starts to rotate forward around the guide shafts 48 and 49, and the small diameter portion 66 of the stay 4 of the headrest 1
From the notch groove 64 of the flange 61 and the passage groove 29 of the mounting body 22, the front side pivots through the window 65 of the flange 61 and the window 28 of the mounting body 22 (FIGS. 7 and 10).

Since the upper end of the front plate 16 of the front half cylinder portion 8 of the support cylinder 7 is bent forward to form the front bent portion 17, the rotating member 44 contacts the front bent portion 17 and rotates. It stops and the headrest 1 stands up from the use state to the non-use state in which it falls down forward (FIGS. 8 and 11).

When the motor is reversed, the vertically moving plate 32 moves downward, and the vertically moving plate 32 is guided by the vertically moving shaft 39 through the guide member.
The guide member 40 pulls the link rod 42 downward by the second left and right mounting shaft 43, and the link rod 42 is
46, the first left and right mounting shaft 46 is
Rotate downward about the guide shafts 48 and 49 of FIG.

In this case, one of the guide shafts 48, 49 of the rotating member 44 has a flat surface 51 formed in a semi-circular shape,
Since the upper end of the one-side vertical movement groove 12 with which the one-side guide shaft 48 is engaged is formed in an inverted L-shape having a corner 53, when the first left and right mounting shaft 46 is pulled downward, One side guide shaft 48
Flat surface 51 abuts on corner 53 and rotates as it is (7th
(Fig. 10, Fig. 13, Fig. 13). Therefore, since the rotating member 44 starts rotating upward around the guide shafts 48 and 49 at the same height position as the front rotation starting position, the rotating member 44 stands up smoothly,
The headrest 1 is in the standing state from the non-use state in which it falls down.

When the vertical moving plate 32 further moves downward, the vertical moving shaft 39 moves the guide member 40, the link rod 42, and the rotating member 44 downward, so that
Position the headrest 1 at the working height.

Note that the headrest 1 is stopped halfway from the time when the headrest 1 is brought into the standing state from the non-use state in which it falls down until the lower surface 3 of the headrest 1 comes into close contact with the upper surface of the backrest sheet 2. It is also possible to adjust the position.

(Effects) A known device disclosed in Japanese Patent Application Laid-Open No. 62-125935 is configured such that when a guide member (shoe) moves upward, the headrest is guided forward by a cam so that the headrest falls forward. The action between the body and the cam surface has a large sliding contact resistance and requires a considerably strong force.It does not work smoothly with a small horsepower motor, and the sliding contact surface requires lubrication because of the discomfort noise of kissing,
There was a problem that oil inside the vehicle might be contaminated.

However, according to the present invention, a vertical stay 4 provided on the headrest 1, a backrest sheet 2 having a support cylinder 7 for inserting the stay 4 from above, and a lower end of the stay 4 A rotating member 44 to be inserted, a guide member 40 provided below the rotating member 44 and directly or indirectly moved up and down by a motor, and an upper end is attached to the rotating member 44 by a first left and right mounting shaft 46. The lower end thereof is formed of a link rod 42 which is fixed to a guide member 40 by a second left and right mounting shaft 43. The positional relationship between the second left and right mounting shaft 43 and the first left and right mounting shaft 46 is the first left and right mounting shaft. 46 is located behind the second left and right mounting shaft 43, and when the rotating member 44 reaches a predetermined position, the first left and right mounting shaft 46 moves about the center of rotation of the rotating member 44, and Stay 4 is a retractable front and rear storage device for the headrest that is configured to automatically fall forward. And, wherein the one side guide shaft 48 and the other side guide shaft 49 projecting to the left and right sides provided on the rotating member 44, the one side guide shaft to the support tube 7
48 engages the one-side vertical movement groove 12 and the other-side guide shaft.
The other-side vertical movement groove 15 with which the 49 is engaged is provided, and when the one-side guide shaft 48 and the other-side guide shaft 49 reach the upper ends of the one-side vertical movement grooves 12, 15, the rotating member 44 rotates. And a backrest seat 2 having vertical stays 4, 4 provided on the headrest 1, and support cylinders 7, 7 for inserting the stays 4, 4 from above.
A guide member 40 fitted to each of the support cylinders 7 and moving up and down in the support cylinder 7, a motor for directly or indirectly moving the guide member 40 up and down, and provided in the support cylinder 7. A link rod 42 having a lower end fixed to the guide member 40 by a second left and right mounting shaft 43 and a lower end provided in the support cylinder 7 and having a lower end fixed to the upper end of the link rod 42 by a first left and right mounting shaft 46. A rotating member 44 to which the lower end of the stay 4 is inserted,
One side guide shaft 48 and the other side guide shaft 49 projecting to the left and right sides from the rotating member 44 and the one side vertical movement groove 12 in which the one side guide shaft 48 formed on the side of the support cylinder 7 is engaged. And the other side vertical movement groove 15 with which the other side guide shaft 49 is engaged, and a window portion 28 formed on the upper side of the support cylinder 7 on the front side for tilting the stay 4 forward. Mounting shaft
The positional relationship between 43 and the first left and right mounting shafts 46 is such that the first left and right mounting shafts 46 in the upper position are located at a position rearward of the second left and right mounting shafts 43 in the lower position, and the guide member 40 is moved upward. And the stay 4 is a retractable front-rear storage device for the headrest which automatically falls down.
The use of the link rod 42 and the structure for stopping the link are
By simply setting the left and right mounting shafts 43 in front of the first left and right mounting shafts 46 in the upper position, the headrest can be easily tilted down, and there is no need for lubrication and the front and rear retractable storage device of the headrest need not be lubricated. To play.

[Brief description of the drawings]

1 is a perspective view, FIG. 2 is a perspective view of an assembled state, FIG. 3 is a partially longitudinal front view, FIG. 4 is a transverse sectional view, FIG. 5 is a longitudinal side view, and FIGS. FIG. 12 to FIG.
FIG. 14 is a vertical sectional side view showing an operation state. DESCRIPTION OF SYMBOLS 1... Headrest 2... Backrest seat 3.
4 ... stay, 5 ... frame, 6 ... mounting plate, 7 ...
Support tube, 8: front half tube portion, 9: rear half tube portion, 10, 11
…… Outer plate, 12… One side vertical movement groove, 13, 14 …… Inner plate, 15 …… Other side vertical movement groove, 16 …… Front plate, 17 …… Front bent part, 18 …… Rear plate, 19 ... bulge, 20 ... protrusion, 21 ...
Engagement hole, 22: mounting body, 23: engagement hole, 24: outer plate,
25 ... guide hole, 26 ... inner plate, 27 ... notch, 28 ... window, 29 ... passage groove, 30 ... front case, 31 ... space,
32… Vertical moving plate, 33… Bend, 34… Flange, 35…
Moving groove, 36 Rack, 37 Gear, 38 Gear case, 39 Rotating shaft, 40 Guide member, 41 Arm, 42
... Link rod, 43 ... Second left and right mounting shaft, 44 ... Rotating member,
45 ... leg part, 46 ... first left and right mounting shaft, 47 ... cylinder part, 48,
49 ... guide shaft, 50 ... arc surface, 51 ... flat surface, 53 ... corner, 60 ... headrest guide, 61 ... flange, 62 ... cylinder, 63 ... insertion hole, 64 ... … Notched groove, 65… Window, 66 ……
Small diameter part.

────────────────────────────────────────────────── ─── Continued on the front page (72) Isao Onda, Inventor 1-1-2 Koyodai, Takanezawa-cho, Shioya-gun, Tochigi Pref. Sowa NS Planning Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) A47C 7/38 B60N 2/48

Claims (3)

(57) [Claims] 1. A vertical stay 4 provided on a headrest 1.
A backrest sheet 2 having a support tube 7 into which the stay 4 is inserted from above, a rotating member 44 which moves up and down in the supporting tube 7 and a lower end of the stay 4 is inserted, and a rotating member 44 A guide member 40 is provided below and is moved up and down directly or indirectly by a motor. The second left and right mounting shaft 43 comprises a link rod 42 to be stopped.
The positional relationship between the first left and right mounting shaft 46 and the first left and right mounting shaft 46 is such that the first left and right mounting shaft 46 is at a position rearward of the second left and right mounting shaft 43, and when the rotating member 44 reaches a predetermined position, A front and rear retractable storage device for a headrest, wherein the first left and right mounting shafts 46 are moved about a rotation center so that the stay 4 automatically falls forward. 2. The rotating member 44 according to claim 1, wherein said rotating member 44 is provided with a one-side guide shaft 48 and a second-side guide shaft 49 projecting to both left and right sides, and said support tube 7 is provided with said one-side guide shaft. A first longitudinal groove 12 with which the shaft 48 engages and a second longitudinal groove 15 with which the other side guide shaft 49 engages are provided, and the one side guide shaft 48 and the other side guide shaft 49 , 15, the front and rear retractable storage device of the headrest, wherein the rotation member 44 is configured to rotate when reaching the upper end. 3. A vertical stay 4 provided on a headrest 1.
4 and support cylinders 7, 7 for inserting the stays 4, 4 from above.
A backrest sheet 2 having: a guide member 40 fitted to each of the support cylinders 7 and moving up and down in the support cylinder 7;
A motor for directly or indirectly moving up and down 40, a link rod 42 provided in the support cylinder 7 and having a lower end fixed to the guide member 40 by a second left and right mounting shaft 43; A lower end of the link rod 42 is fixed to the upper end of the link rod 42 by a first left and right mounting shaft 46, and a lower end of the stay 4 is inserted therein. The one-side vertical movement groove 12 and the other-side guide shaft 49 are engaged with the one-side guide shaft 48 and the other-side guide shaft 49, which are engaged with the one-side guide shaft 48 formed on the side of the support cylinder 7. It comprises a longitudinal groove 15 on the other side, and a window 28 formed on the front side of the upper part of the support cylinder 7 for tilting the stay 4 forward. The lower left and right mounting shaft 43 and the upper first left and right mounting Axis 46
The positional relationship is that the first left and right mounting shaft 46 at the upper position is located at a position rearward of the second left and right mounting shaft 43 at the lower position, and when the guide member 40 is moved upward, the stay 4 automatically falls forward. Front and rear retractable storage device for headrest.