JPS61105252A - Seat unit - Google Patents

Abstract

PURPOSE:To secure safety of rear seat passengers by inclining the seat-back forward, when a shock more than the fixed load is given from the rearward of a seat-back, and relieving the above-mentioned shock on a reclining type seat unit. CONSTITUTION:Install the lower ends of a seat-back frame 2, to fit the ends of the left and the right frames of the seat-back for a seat, to a base frame 3 with pin-joints which make the seat-back incline freely. Then, install a break- over arm 6 being rotatable freely with a shaft 7a which installs the frame 2 to slide frame 4, on which a seat-bottom is mounted, and engage shafts 9 to the seat-back frame 2 with circular guide grooves 8 on the side of the arm 6. Also, at the other shaft fitting portion 7b of the frame 2, install a bracket 11 having a stop frame which prevents rearward turning of the frame 2, and install shafts 13a and 13b with protrusion which engage with long hole guides 15a and 15b of the slide frame 4 side at each lower end of the arm 6 and the bracket 11.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to seat devices for vehicles, ships, aircraft, etc. In particular, when a force exceeding a predetermined load is applied to the rear of the seat back of a seat, This invention relates to a seat device that can absorb shock by tilting the seat back forward.

(Prior Art) Conventionally, the seat back of a seat in a vehicle, a ship, an airplane, etc. is tilted rearward as desired, and in conjunction with this, the seat bottom is pushed forward, allowing the user to use the seat comfortably. So-called reclining seat devices are often used.

However, recently there has been a demand for a seat device that is not only convenient for the user but also has a function to ensure safety for people other than the user. In particular, when an aircraft traveling at high speed has to come to a sudden stop due to an accident or other reasons, it is not uncommon for passengers to be thrown forward by the inertia and collide with the seatbacks of the front seats, resulting in death or injury. Even in such a case, if the structure is such that the front seat pack tilts forward in response to an impact from the rear and absorbs the impact, the impact on the front seats will be alleviated and the number of accidents resulting in death or injury can be reduced. It is possible. Therefore, as in the past, breakover arms were attached to both sides of the pivot support part of the seatback frame for fixing the left and right edges of the seatback, and were rotatable in the forward and reverse directions to act as a means of absorbing the forward impact. The breakover arm is used as a relay member to connect the seat back frame to the upper end and the base frame to the lower end, absorbing and mitigating the impact of more than a predetermined load applied to the rear of the seat back within a predetermined range. A seat device has been proposed in which a slide frame to which a seat bottom is attached can be slid in the longitudinal direction in response to the reclining motion of the seat.

(Problem to be Solved by the Invention) However, according to the conventional device described above, large breakover arms are attached to the left and right lower ends of the seatback frame, so extra large members are required on both sides of the seatback frame. This not only creates a large storage space, but also increases the weight of the components, which is a problem especially for aircraft seat systems that require space saving and weight reduction.

The present invention was created in view of the above problems, and
The purpose of this is to save space and reduce the weight of the device while maintaining the same functions as conventional seat devices.

(Means for solving the problem) Therefore, the seat device according to the present invention has a breakover coaxially attached to one shaft attachment part that rotatably supports the seatback frame that fixes the left and right edge parts of the seatback. The arm is attached so as to be able to rotate in forward and reverse directions, and the shaft fixed to the seat back frame is fitted into a guide groove formed transparently on the upper end side with the shaft attachment part as the center of rotation, and the shaft is mounted coaxially with the other shaft attachment part. A bracket having a locking edge for preventing rotation of the seatback frame is attached to the upper end of the seat back frame with the cough shaft attachment part as the center of rotation, and is rotatable in forward and reverse directions. The provided shafts are connected to each other by fitting into guide slots formed transparently on the slide frame side, and a sheet lock is interposed between the lower end side of the breakover arm and the base frame. It is.

(Function) By omitting one breakover arm, it is possible to save space and reduce the weight of the device, and one breakover arm absorbs the impact applied to the rear of the seatback, and when the seatback reclines. The seatback frame and slide frame are interlocked with each other using the breakover arm and the bracket as relay members to freely tilt the seatback rearward and slide the seat bottom forward.

(Example) Preferred embodiments of the present invention will be described below with reference to the drawings.

The present invention will be described in detail below with reference to the drawings.

In the drawing, l is the seat back of the seat, 2 is a seat back frame for fixing the left and right edges of the seat back l, and the lower end of each is pivoted to the base frame 3 of the seat. The device is arranged so that the lower end can freely rotate and the upper end can be tilted in the front-rear direction if desired. A slide frame 4 is mounted on the base frame 3 of the seat and slides freely in the front and rear directions in response to the seat back 1, and the seat bottom 5 is mounted on the upper part.

The seat back frame 2 and the slide frame 4 are connected using a relay member at one end side of each, that is, the lower end of the seat back frame 2 and the rear end of the slide frame 4, so that the reclining movement of the seat back frame 2 and the slide frame The front and rear sliding movements of 4 are linked. 6 is
It is a breakover arm that serves as one relay member,
The seat back frame 2 is attached to the slide frame 4 by one of the shafts 7a, so that the seat back frame 2 is attached coaxially with the seat back frame 2 so as to be rotatable in forward and reverse directions.

The breakover arm 6 is provided with one or more arc-shaped guide grooves 8 formed along the circumferential direction and with the shaft attachment portion as the center of rotation on its upper end side.
A shaft 9 fixed to the side end surface of the seat back frame 2 is fitted into the guide groove 8. This guide groove 8 is for specifying the forward inclination angle of the seat back 1, and when the seat back 1 is in the normal use position, the shaft 9 fixed to the seat back frame 2 is located at the rear end of the guide groove 8. When a predetermined load is applied to the seat back 1, the seat back 1 can be tilted forward to a position where the shaft 9 engages with the front edge of the guide groove 8. 1o
is a spacer that holds the upper end side of the breakover arm 6 in which the guide groove 8 is formed. It is established.

This spacer 10 has a frictional force that can prevent forward rotation of the seat bar 1 against a load within a predetermined range, and the load-bearing force of the clamping portion with respect to the breakover arm 6 is It can be adjusted as appropriate depending on the material of the shaft 9 and the tightening force of the shaft 9. Reference numeral 11 denotes a lightweight, plate-shaped bracket that serves as the other relay member for the breakover arm. This bracket 11 works together with the breakover arm 6 to support the seat back frame 2.
The reclining motion of the seat back frame 2 and the front and back sliding motion of the slide frame 4 are linked.
is attached to the slide frame 4 by the other shaft 7b coaxially with the seat back frame 2 so as to be rotatable in the forward and reverse directions, and a lock is provided at its upper end to prevent rearward rotation of the seat back frame 2. It has a rim 12.

The breakover arm 6 and the bracket 11 each have shafts 13a and 13b protruding from their lower end surfaces, respectively, and the shafts 13a and 13b extend to the left and right rear side edges of the slide frame 4 to form an ear piece 14a.

They are loosely fitted into the guide holes 15a and 15b of 14b and connected. When the seat back 1 is tilted rearward as desired, the seat back frame 2 rotates rearward about the shafts 7a and 7b, and the breakover arm 6
The upper end side of the bracket 11 is locked and rotated backward, and at the same time, the lower end side is rotated forward. Guide slot 15
a and 15b are for pushing the slide frame 4 forward by rotating the lower end side forward, and are for pushing forward and upward the shafts 13a and 13b fixed to the lower ends of the breakover arm 6 and the bracket 11, respectively. It has a long axis that can absorb the rotation of the shaft 1 within a predetermined range.
The normal use position of the seat back 1 and the rear position of the slide frame 4 are determined at the positions where the guide holes 3a and 13b are respectively locked to the lower edges of the corresponding elongated guide holes 15a and 15b,
Further, the shafts 13a and 13b correspond to guide elongated holes 15a, respectively.

The maximum rearward tilt position of the seat back 1 and the frontmost position of the slide frame 4 are determined at the position where the seat back 1 is locked to the upper edge of the seat back 15b. Thus, the reclining operation of the seat back 1 of the seat can be linked to the longitudinal movement of the seat bottom 5.

Reference numeral 16 denotes a seat lock interposed between the lower end of the breakover arm 6 and the base frame 3, which can be freely expanded and contracted by operating a reclining button (not shown) and locks the breakover at a predetermined length. Rotation of the arm 6 can be prevented. Therefore, the seat back 1 can be tilted rearward at a desired angle and the tilted position can be fixed.

(Effects of the Invention) Since the present invention is constructed as described above, during normal use, the seat back can be tilted rearward as desired to perform a so-called reclining operation, and a load of more than a predetermined load can be applied from the rear of the seat park. When an impact is applied, the seat device tilts forward to alleviate the impact, ensuring safety for the passengers who use it, and at the same time saving space and reducing the weight of the seat device. It is possible to achieve this goal.

[Brief explanation of the drawing]

The drawings show an embodiment of the seat device according to the present invention, and FIG. 1 is a side view of the seat, FIG. 2 is an enlarged side view of the seat device, FIG. 3 is an enlarged rear view, and FIG. The figure is Figure 2A
5 shows the details of the breakover arm, (A) is an enlarged front view, (B) is an enlarged side view, (C) is an enlarged right side view, and FIG. FIG. 3 is an enlarged front view of the bracket.

Claims (1)

[Claims] A breakover arm is attached so as to be rotatable in the forward and reverse directions on the same axis as one of the pivot parts that rotatably supports the seat back frame that fixes the left and right edges of the seat back, and the pivot part is the center of rotation. The shaft fixed to the seat back frame is fitted into the guide groove formed transparently on the upper end side, and the seat back frame is rotated coaxially with the other shaft mounting part at the upper end part with the shaft mounting part as the center of rotation. A bracket formed with a locking edge for blocking is attached so as to be rotatable in forward and reverse directions,
Shafts protruding from the lower end surfaces of the breakover arm and the bracket are connected to each other by fitting into guide slots formed transparently in the slide frame, and between the lower end side of the breakover arm and the base frame. A seat device characterized in that a seat lock is interposed between the seats.