JPH0526609U - Seat device - Google Patents

Abstract

(57) [Summary] [Purpose] Provide a seat device that does not disturb the headrest even when the seatback is tilted to a full flat state without removing the headrest from the seatback, and does not pose a problem for the location of the headrest. To do. In a full-flat type seat apparatus A, one end of a first rod 4 is rotatably attached to an upper part of a seat back 2 about a first turning shaft 6, and a lower part of a headrest 3 is One end of the second rod 7 is rotatably attached around the second rotation shaft 9, and the first and second rods 4 and 7 are connected slidably in the axial direction, and the other end of the first rod 4 is connected. And the headrest 2, and between the other end of the second rod 7 and the seat back 2, the headrest 3 rotates rearward with respect to the first rod 4 only when the headrest 3 is pulled up most. Guide brackets 5 and 8 are provided to allow the second rod 7 to rotate rearward with respect to the seat back 2. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a seat device in which a seat back is tilted to a substantially horizontal position so that the seat cushion and the seat back are flat, and the shape can be changed to a state generally called a full flat. Regarding the structure of the part.

[0002]

[Prior Art]

 In recent years, for the purpose of improving the usability of automobiles, for example, the seat back is tilted rearward substantially horizontally to make it flat with the seat back at the time of rest, and the seat cushion of a seat device provided behind the seat device is also used. There is known a seat device that can be used in a bed state by connecting it flat (see Japanese Utility Model Laid-Open No. 3-39447). Such a seat device is generally called a full flat type.

In such a conventional seat device, when the seat back is used by being connected to the seat cushion of the seat device provided at the rear, the headrest is an obstacle and is removed.

[0004]

[Problems to be solved by the device]

 However, in the conventional seat apparatus as described above, the headrest is removed when it is fully flattened, so there is a problem in that the location of the headrest is difficult.

The present invention has been made in view of the above-mentioned conventional problems. When the seat back is tilted to the full flat state, it becomes an obstacle even if the headrest is not removed from the seat back. It is an object of the present invention to provide a seat device that does not have a problem in the location of the headrest.

[0006]

[Means for Solving the Problems] Therefore, according to the present invention, the headrest can be rotated to the back side of the seatback by a simple mechanism, and when the seatback is tilted to a full flat state, the headrest is seated. I tried to achieve the above-mentioned purpose by hiding it on the back side of.

That is, in the seat device of the present invention, in the seat device in which the seat back having the headrest attached to the upper part is rotatably provided to a position which is substantially horizontal rearward with respect to the seat cushion, One end of the first connecting body is attached to the upper part of the back so as to be rotatable in the front-rear direction about the first rotation shaft, and one end of the second connecting body is attached to the lower part of the head rest. It is attached so as to be rotatable in the front-rear direction about the rotation axis, and the first connecting body and the second connecting body are connected so as to be capable of expanding and contracting by relatively sliding in the axial direction. When retracted when pulled up with respect to the seat back, the head restraint is pulled up between the other end of the first connecting body and the headrest and between the other end of the second connecting body and the seat back to connect them together. Body Allows the headrest to rotate rearward with respect to the other end of the first connecting body and the second connecting body to rotate rearward with respect to the seatback only when retracted to a predetermined position. However, in a state other than the retracted state of the predetermined position, a guide means for restricting these rotations is provided.

[0008]

[Action]

 When the seatback is normally set up, the relative position between the first connecting body and the second connecting body is arranged at a position other than the predetermined position where the headrest and the second connecting body rotate. In this state, the headrest and the second connecting body are restricted from rotating with respect to the first connecting body and the seat back by the guide means, respectively, whereby the headrest is kept in the standing state and the occupant's body is maintained. Supports the head.

When the seat back is tilted to a substantially horizontal state to be in a so-called full flat state, the headrest is pulled up to retract the first connecting body and the second connecting body to predetermined positions. Then, the rotation restriction on the headrest and the second connecting body by the guide means is released, the headrest rotates rearward with respect to the other end of the first connecting body, and the second connecting body moves to the seat back. On the other hand, the headrest turns to the rear side of the seat back by turning backward.

Therefore, when the seat back is tilted to a substantially horizontal position in this state to make it full flat, the headrest is hidden behind the seat back. Therefore, even if the front end of the seatback and the front end of the seat cushion of the rear seat device are brought into contact with each other, the headrest does not get in the way, and since the headrest is not removed from the seatback, there is no need to worry about the storage location.

[0011]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

First, the configuration of the embodiment will be described.

FIG. 6A is a side view showing the entire seat device A of the first embodiment of the present invention. This seat device has a seat cushion 1, a seat back 2, and a headrest 3. There is. The seat back 2 is attached to the seat cushion 1 so as to be rotatable rearward to a position substantially horizontal to the seat cushion 1. A second seat device B is provided behind the seat device of the first embodiment.

FIG. 1 is a structural explanatory view of a main part of a seat device A according to a first embodiment as viewed from a side surface, and a cylindrical first rod (first One end of a connecting body 4) is attached to a second guide bracket (guide step) 5 fixed to the seat back 2 so as to be rotatable in the front-rear direction about a first rotating shaft 6. The upper end of the first rod 4 is formed in a curved shape.

On the other hand, at the lower end of the headrest 3, one end of a cylindrical second rod (second connecting body) 7 having a diameter slightly smaller than that of the first rod 4 is fixed to the headrest 3. The first guide bracket (guide means) 8 is attached so as to be rotatable in the front-rear direction about the second rotation shaft 9. The lower end of the second rod 7 has a curved shape.

Then, as also shown in FIG. 3, the second rod 7 is inserted into the inside of the first rod 4, and the second rod 7 is inserted into the elongated hole 4 a axially formed in the first rod 4. The rotation shaft 9 is inserted into the second rod 7, and the first rotation shaft 6 is inserted into the elongated hole 7a formed in the second rod 7 in the axial direction. ) Is slidably connected to.

The first and second rods 4 and 7, the first and second guide brackets 8 and 5, and the first and second rotating shafts 6 and 9 are provided in pairs on the left and right respectively.

The first guide bracket 8 is formed with a sliding guide hole 8a for slidably supporting the first rod 4 in the axial direction, and is continuously connected to the lower end of the sliding guide hole 8a. A rotation guide surface 8b is formed to guide the headrest 3 to rotate rearward with respect to the first rod 4 about the second rotation shaft 9. The rearward rotation of the headrest 3 about the second rotation shaft 9 is restricted when the first rod 4 is arranged in the sliding guide hole 8a, and the second rotation shaft 9 is prevented. When the first rod 4 is placed outside the sliding guide hole 8a by retracting both rods 4 and 7 until it is placed at the end of the long hole 4a (this means that the headrest 3 is at the uppermost position). (Equivalent to when you pull up) is released.

The second guide bracket 5 is also formed in the same manner as the first guide bracket 8 and is formed with a slide guide 5a hole for supporting the second rod 7 so as to be slidable in the axial direction. At the same time, a rotation guide surface 5b is formed to guide the second rod 7 to rotate rearward with respect to the seat back 2 about the first rotation shaft 6. The second rod 7 rotates with respect to the seat back 2 even when the headrest 3 is pulled up to the position where the first rotation shaft 6 is located at the end of the elongated hole 7a. It is possible only when degenerated 4,7. Further, the second guide bracket 5 is provided with a latch 5c capable of projecting and retracting in the sliding guide hole 5a by a spring 5d biased in the projecting direction. By engaging with the groove 7b formed on the outer periphery of the rod 7, it is possible to check the sliding amount of the second rod 7 and the sliding guide hole 5a in multiple stages.

Further, as shown in FIG. 3, which is an exploded perspective view of a main part of the seat device A, and FIG. 4 and FIG. 5, which are perspective views of the back side of the upper part of the seat device A, as shown in FIG. , 5 are formed from the upper surface to the rear surface of the seat back 2 at the positions where the notches 2a, 2a for allowing the rotation of both rods 4, 7 are formed, and the notch is also formed from the lower surface of the headrest 3 to the rear surface. Portions 3a, 3a are formed.

Next, the operation of the embodiment will be described.

A) Normal Time When the seat back 2 is in a normal position, the first rod 4 and the second rod 7 are respectively slidable as shown in FIG. 1 without pulling out the headrest 3 to the uppermost position. It is placed in the holes 8a and 5a. In this state, the second rod 7 is restricted from rotating about the first rotating shaft 6, and the headrest 3 is restricted from rotating about the second rotating shaft 9. As a result, the headrest 3 supports the occupant's head while maintaining the standing state shown in FIG.

B) At full flat When the seat back 2 is tilted to a substantially horizontal state to be in the so-called full flat state shown in FIG. 6D, first, the headrest 3 is moved to the uppermost position as shown in FIG. 6B. Pull up. As a result, the first rod 4 and the second rod 7 are retracted within the range permitted by the elongated holes 4a, 7a and the rotating shafts 9, 6, and the upper end of the first rod 4 is at the lower end of the sliding guide hole 8a. At the same time, the lower end of the second rod 7 reaches the upper end of the sliding guide hole 5a. Therefore, the rods 4 and 7 can be rotated along the rotation guide surfaces 8b and 5b, the second rod 7 can be rotated rearward with respect to the seat back 2, and the headrest 3 can be rotated. When the first rod 4 is rotated rearward, the headrest 3 is rotated until the back surface of the headrest 3 comes close to the back surface of the seatback 2, as shown in FIGS. 2 and 6C. By the way, in order to rotate the headrest 3 in this manner, the length from the other end of each rod 4, 7 to each rotation shaft 6, 9 on one end side is set from the installation position of the first rotation shaft 6. It is necessary to set the distance to the back surface of the seat back 2 and the distance from the installation position of the second rotation shaft 9 to the back surface of the headrest 3 to be slightly longer.

Therefore, in this state, when the seat back 2 is tilted to a substantially horizontal position and fully flattened as shown in FIG. 6D, the headrest 3 is hidden behind the seat back 2. Therefore, when the front end of the seat back 2 and the front end of the seat cushion b1 of the rear seat device B are brought into contact with each other, the headrest 3 does not get in the way, and the headrest 3 is not removed from the seat back 2, so that it is stored in a place. There is no need to worry.

In addition, the structure for rotating the headrest 3 to the back surface side of the seat back 2 as described above has a structure in which the cylindrical rods 4 and 7 and the rotations to which the rods 4 and 7 are rotatably attached. Since the shafts 6 and 9 and the guide brackets 5 and 8 having the sliding guide holes 5a and 8a and the guide surfaces 5b and 8b are formed, the structure is simple and the manufacturing cost can be kept low.

Next, a second embodiment of the present invention shown in FIG. 7 will be described. In the description of the second embodiment, the same components as those of the first embodiment are designated by the same reference numerals as those of the first embodiment and the description thereof will be omitted. explain.

The second embodiment is an example in which flat plates are used as the first and second rods, and pins and grooves are used as guide means.

That is, one end of the first rod 24 formed in the shape of a flat bar is rotatably attached to the second guide bracket 25 fixed to the seat back 2 by the first rotation shaft 26, and the other end thereof. The first pin 24b is fixed to. On the other hand, one end of the second rod 27 is rotatably attached to the first guide bracket 28 fixed to the headrest 2 by the second rotation shaft 29, and the other end thereof is fixed with the second pin 27b. .. The rods 24 and 27 are provided with elongated holes 24a and 27 for slidingly guiding the second rotating shaft 29 and the first rotating shaft 26, respectively.

The first guide bracket 28 attached to the lower portion of the headrest 3 has a sliding guide hole 28a for slidingly guiding the first pin 24b in the axial direction of the first rod 24, and the sliding guide hole 28a. A rotation guide hole 28b, which is continuous with the lower end of the hole 28a and guides the rotation of the headrest 3 about the second rotation shaft 29, is formed. On the other hand, in the second guide bracket 25 attached to the upper part of the seat back 2, a sliding guide hole 25a for slidingly guiding the second pin 27b in the axial direction of the second rod 27, and the sliding guide hole 25a. A rotation guide hole 25b that is continuous with the upper end and guides the rotation of the second rod 27 and the first rod 24 about the first rotation shaft 26 is formed.

Therefore, the same effect as that of the first embodiment can be obtained.

Although the embodiment of the present invention has been described above with reference to the drawings, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. Also included in the present invention.

[0032]

[Effect of the device]

 As described above, in the seat device of the present invention, the first connecting body and the second connecting body are rotatably attached to the seat back and the headrest, respectively, and both connecting bodies are pivoted. The headrest rotates rearward with respect to the other end of the first connecting body and the second connecting body only when the headrest is pulled up to retract both connecting bodies to the predetermined position. Since the body is allowed to rotate backward with respect to the seat back, and the guide means for restricting these rotations is provided in other states, the headrest is located on the back side of the seat back when fully flattened. This makes the headrest unobtrusive even when the tip of the seat back and the tip of the seat cushion of the rear seat device come into contact with each other, and the headrest does not interfere. Do not removed from the seat back, the effect is obtained that it is also not name that trouble with location.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing a main part (a headrest standing state) of a seat device according to a first embodiment of the present invention.

FIG. 2 is a structural explanatory view showing a main part of the device of the first embodiment of the present invention (a state in which the headrest is rotated rearward).

FIG. 3 is an exploded perspective view showing a main part of the first embodiment device of the present invention.

FIG. 4 is a perspective view of the upper portion of the seat back of the device of the first embodiment of the present invention as viewed obliquely from the rear (headrest standing state).

FIG. 5 is a perspective view of the upper portion of the seat back of the device of the first embodiment of the present invention as viewed obliquely from the rear (a state in which the headrest is rotated rearward).

FIG. 6 is an operation explanatory view showing a form change of the seat device of the first embodiment of the present invention.

FIG. 7 is a structural explanatory view showing a main part of a seat device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat cushion 2 Seat back 3 Headrest 4 1st rod (1st connection body) 5 2nd guide bracket (guide means) 6 1st rotation shaft 7 2nd rod (2nd connection body) 8 1st guide Bracket (guide means) 9 Second rotating shaft 24 First rod (first connecting body) 25 Second guide bracket (guide means) 26 First rotating shaft 27 Second rod (second connecting body) 28 1st guide bracket (guide means) 29 2nd rotating shaft A Seat device of 1st Example

Claims (1)

[Scope of utility model registration request] 1. A seat device in which a seat back having a headrest mounted on the upper part thereof is provided so as to be rotatable rearward to a position substantially horizontal to a seat cushion, wherein a first connecting body is provided on the upper part of the seat back. One end is first
Is attached so as to be rotatable in the front-rear direction about a rotation axis of the second connecting body, and one end of the second connecting body is provided at a lower portion of the headrest.
Is attached so as to be rotatable in the front-rear direction about the rotation axis of the headrest, and the first connecting body and the second connecting body are connected so as to be expandable and contractable by relatively sliding in the axial direction. Is retracted when pulled up with respect to the seatback, and the headrest is pulled up between the other end of the first connecting body and the headrest, and between the other end of the second connecting body and the seatback. Allows the headrest to rotate rearward with respect to the other end of the first connecting body and the second connecting body to rotate rearward with respect to the seat back only when the body is retracted to a predetermined position. However, the seat device is provided with guide means for restricting the rotation of the predetermined position other than the retracted state.