JPH0572247U - Reclining device for vehicle seat - Google Patents

Abstract

(57) [Summary] [Purpose] The relative position of the headrest with respect to the seat back is changed regardless of the operating state of the reclining device. [Structure] A seat back 4 standing upright at a rear end of a seat bottom 3 is pivotally supported by a reclining device 10 formed at a lower end thereof in a predetermined angle range A so as to be able to be tilted backward. A headrest 13 is integrally formed on the top end of the seat back 4. A direction in which the back contact portion of the seat back 4 is independent of both sides as the central seat back portion 15, and the lower end portion of the central seat back portion 15 is retracted from the surface of the seat back 4 with respect to the lower end portion of the seat back 4. It is pivotally supported by an auxiliary reclining device 19 so as to be swingable in the range B.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a vehicle seat having a reclining type seat back mounted on a railway vehicle, a ship, an aircraft, etc., and particularly for a vehicle in which the relative position of the headrest can be changed when the seat back is tilted backward. It relates to a reclining device for a stool.

[0002]

[Prior Art]

 As shown in FIG. 5, a reclining type seat back used for a conventional vehicle stool in an aircraft, various vehicles, ships, etc. is a seat erected at the rear end of a seat bottom 50, as shown in FIG. In most cases, the back 51 is configured to be able to be tilted backward within a predetermined angle range via a pivotal support structure 52 formed at the lower end. A headrest 53 is integrally formed on the upper end of the seat back 51, or a headrest separately formed is fixed to the portion.

[0003]

[Problems to be solved by the device]

 Therefore, when the seat back 51 is fully tilted backward by operating the reclining device (not shown) for the vehicle seat, the headrest 53 does not change its relative position with respect to the seat back 51 as indicated by the chain double-dashed line. Also, the user's head becomes completely in a supine sleeping position. For this reason, when reading a book or newspaper in this position, the user had to raise his / her neck (arrow X) and lift it from the headrest 53, which was very fatigued.

The present invention has been made in view of the above problems, and the relative position of the headrest with respect to the seatback can be changed regardless of the operating state of the reclining device, and the seatback is completely tilted backward. However, it is an object of the present invention to provide a reclining device for a vehicle stool capable of reading in a comfortable posture.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a reclining device for a vehicle seat according to the present invention comprises a seatback standing upright at a rear end of a seat bottom and a predetermined angle through a reclining device formed at the lower end. The seat back is pivotally supported so that it can be tilted backward, and a headrest is integrally or integrally formed on the top end of the seatback. A separate structure independent of the reclining device is adopted so that the lower end of the central seat back portion can swing with respect to the lower end portion of the seat back at least in a direction retracted from the seat back surface. The gist is that the bearings are pivotally supported through the auxiliary reclining device of the above.

[0006]

[Action]

 According to the above configuration, the seat back can be tilted at a desired angle by operating the reclining device, and the central seat back portion can be moved to the seat back surface by operating the auxiliary reclining device at the reclining position. Can be swung relative to and at least retracted. However, since the headrest is provided at the top end of the seatback, when the auxiliary seatback is retracted, the headrest is relatively moved forward (in a direction projecting from the surface of the auxiliary seatback). And the pillow is raised.

As a result, in the sleeping state in which the reclining device is operated and the seat back is fully tilted backward, when the auxiliary reclining device is operated in the backward direction, the pillow height of the headrest becomes higher than the central seat back portion. Thus, the user's occipital region is pushed up and the neck is tilted forward, so that a posture suitable for reading a book standing around the chest can be obtained.

[0008]

【Example】

 An embodiment of a reclining device for a vehicle stool according to the present invention will be described below with reference to FIGS. 1 to 3. In the drawings, reference numeral 1 denotes a bottom frame disposed above the leg frame 2, and a seat bottom 3 is mounted and fixed on the upper surface of the bottom frame 1. The seat back 4 is configured such that the lower ends of both side frame portions of the back frame 21 are rotatably pivoted with respect to a support shaft 6 that is installed between brackets 5 and 5 that project from the rear frame 2a of the leg frame 2. A hydraulic cylinder type main seat urged in the extending direction between the tip of the swing arm 7 projecting in the direction extending from the lower end of the back frame 21 and the bracket 8 projecting on the side frame 2b of the leg frame 2. A reclining device 10 having a lock 9 inserted therein is configured.

In this reclining device 10, a reclining operation button 12 provided on an operation portion of an armrest 11 and a release operation portion (not shown) of a main seat lock 9 are connected to each other, and the seat back 4 is moved from an upright position. The structure is such that it tilts and supports at a desired position within the range (arrow A) up to the rearward tilt position.

A headrest 13 is integrally formed at the top end of the seatback 4, and the front side of the seatback 4 is formed by separating the lower part of the headrest 13 from the headrest 13 except for both side parts. A central seat back portion 15 stretched over 14 is constructed.

The lower ends of both side frame portions of the auxiliary reclining frame 14 are rotatably pivoted with respect to the support shaft 6, and the swing arm 16 is provided so as to project in a direction extending from the lower end of the auxiliary reclining frame 14. An auxiliary reclining device 19 is formed by inserting a hydraulic cylinder type sub seat lock 18 that is driven and biased in the extending direction between the tip of the main seat lock 9 and the bracket 17 protruding from the neck of the outer cylinder of the main seat lock 9.

In this auxiliary reclining device 19, an auxiliary reclining operation button 20 provided in parallel with a reclining operation button 12 is connected to an operation portion of an armrest 11, and a release operation portion (not shown) of a sub seat lock 18 is connected. The central seat back portion 15 is structured so as to be pivotally supported at a desired position within a range (arrow B) from the same surface position as the seat back 4 to the retracted position.

The vehicle seat reclining device configured as described above can obtain each operating posture shown in FIG.

FIG. 4A shows a normal standing posture, in which the main seat lock 9 and the sub seat lock 18 are locked in the most extended state, and at this time, the supporting surface of the central seat back portion 15 is locked. Is supported at the same level as the seat surface of the seat back 4.

FIG. 4B shows a state in which only the central seat back portion 15 is tilted backward from the standing state of FIG. 4A, and the central seat back portion 15 is supported while the auxiliary reclining operation button 20 is pressed. Push the surface backwards to lock the sub seat lock 18 in the shortened position. In this posture, the bucket structure has a standing posture in which the upper end of the central seat back portion 15 is retracted from the headrest 13 and both sides of the seat backs 4 located on both sides of the central seat back portion 15 protrude forward. Form.

FIG. 4C shows the seat back 4 which is tilted backward from the standing state of FIG. 4A, and the central seat back portion 15 together with the seat back 4 does not change its relative position. Defeat. While pressing the reclining operation button 12, the supporting surface of the seat back 4 is pressed (actually, the supporting surface of the central seat back portion 15 is pressed), and the main body is tilted back to a desired angle. Lock the seat lock 9 in the shortened state. At this time, the sub seat lock 18 is inserted between the tip of the swing arm 16 protruding from the auxiliary reclining frame 14 and the bracket 17 protruding from the outer cylinder neck of the main seat lock 9, and is in a non-stretchable state. Since the length does not change, the central seat back portion 15 has the same angular displacement as the seat back 4, and forms the same surface regardless of the tilt position of the seat back 4.

FIG. 4D shows a state in which only the central seatback portion 15 is further tilted from the rearwardly tilted state of the above-mentioned (c), and the central seatback portion 15 is pressed while the auxiliary reclining operation button 20 is pressed. The supporting surface of is pressed further rearward to lock the sub seat lock 18 at the shortened position. In this posture, the supporting surface at the upper end of the central seatback portion 15 is retracted from the headrest 13 and is in a tilted posture. Therefore, since the headrest 13 lifts the back of the user's head, the headrest of the user leans forward.

Further, when returning to the state from (b) to (a) or from (d) to (c), the auxiliary seat reclining operation button 20 is pressed and the central seat back portion 15 is pressed. It can be carried out by removing the pressing force from the supporting surface. That is, when the auxiliary reclining operation button 20 is pressed, the sub seat lock 18 is released, and the extension force of the sub seat lock 18 causes the central seat back portion 15 to pivot and return about the support shaft 6 and its position. When the pressing of the auxiliary reclining operation button 20 is released with, the sub seat lock 18 is locked again.

When the seat back 4 in the rearward tilted posture (c) or (d) is returned to the standing posture (a) or (b), the reclining operation button 12 is pressed and the central seat back is pushed. It can be carried out by removing the pressing force from the supporting surface of the portion 15. That is, when the reclining operation button 12 is pressed, the main seat lock 9 is released, and the extension force of the main seat lock 9 causes the seat back 4 to pivot and return about the support shaft 6 at that position. When the pressing of the reclining operation button 12 is released, the seat lock 9 is locked again.

In the above-mentioned embodiment, the reclining device 10 and the auxiliary reclining device 19 are constituted by the hydraulic cylinder type seat lock which is biased by driving in the extension direction. However, the reclining structure may be a motor drive type or the like. It can be configured in the same manner by the reclining driving means.

Further, in the description of the above-mentioned embodiments, the stool for aircraft has been described, but the stool for vehicles such as buses and trains and the stool for movie theaters and theaters can also be similarly implemented.

[0022]

[Effect of the device]

 The reclining device for a vehicle seat according to the present invention is a seat seat in which a headrest is integrally or integrally fixed to the top end of the seatback, and the central portion of the seatback is a central seatback portion that can be retracted from the bearing surface. By constructing an independent structure and adding an auxiliary reclining device between the seat back and the central seat back part, the relative position of the headrest with respect to the seat back can be changed regardless of the operating state of the reclining device. It has features such as being able to read a book in a comfortable posture even when it is tilted backward, and the practical effect after implementing the present invention is extremely large.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an aircraft seat that constitutes a reclining device for a vehicle seat according to the present invention.

FIG. 2 is a front view in which the same portion is cut away.

FIG. 3 is a perspective view showing the reclining device.

4A to 4D are explanatory views showing the operating postures of a seat back and a central seat back portion.

FIG. 5 is an explanatory diagram showing an operating state of a seat back in a conventional reclining device.

[Explanation of symbols]

 3 Seat bottom 4 Seat back 10 Reclining device 13 Headrest 15 Central seat back part 19 Auxiliary reclining device

Claims (1)

[Scope of utility model registration request] 1. A seat back standing upright at the rear end of the seat bottom is pivotally supported in a tiltable manner within a predetermined angle range through a reclining device formed at the lower end, and the seat back is also supported. In a vehicle stool in which a headrest is integrally or integrally formed at the top end of the seat back, the seat back portion of the seat back serves as a central seat back portion which is independent of both sides, and the lower end portion of the central seat back portion is seated. It is pivotally supported via a separate auxiliary reclining device independent of the reclining device so that it can swing at least in a direction retracting from the surface of the seat back with respect to the lower end of the back. Stool reclining device for vehicles.