JPH0118424Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to the structure of a vehicle seat bag. More specifically, the present invention relates to a structure of a vehicle seat bag in which the seat bag is arranged so as to be tiltable toward the upper side of the seat cushion. Regarding.

(Prior Art) A seat back of a vehicle seat is attached to a seat cushion so as to be tiltable, and the inclination angle can be freely adjusted according to the physique and preferences of the occupant. In addition, the back frame of this seat bag is composed of an upper support frame and a lower support frame, and the upper support frame is rotatably connected via a lock mechanism to adjust the seat surface of the seat bag (Utility Model No. 58-89436). (Japanese Utility Model Application Publication No. 140353/1983), and one in which the swing angle of the upper seat bag can be adjusted (Utility Model Application Publication No. 1983-140353).
132960), etc., and there are seat back structures in which the angle of the seat back itself is adjusted to provide a lumbar support effect.

(Problems to be Solved by the Invention) However, in the conventional vehicle seat bags, there is no structure in which the upper support frame, which is divided into upper and lower halves, can be bent approximately at right angles to the lower support frame. There is no one in which the upper support frame side is configured as a seat back for a child seat. Furthermore, the upper support frame is connected to the lower support frame via a locking mechanism, which is easy to operate, has excellent assembly, is inexpensive, and has a secure locking condition. No resulting locking mechanism has been proposed.

(Purpose of the invention) The purpose of the invention is to divide the back frame of the seat back into an upper support frame and a lower support frame to form a seat back frame that is easy to operate, has excellent assemblability, is inexpensive, and is reliable. To provide a highly economical vehicle seat bag structure in which an upper support frame is rotatably connected to a lower support frame through a locking mechanism capable of obtaining a locked state, and the seat bag can be used as a child seat. .

(Means for Solving the Problems) The present invention provides a structure of a vehicle seat bag in which the seat bag is arranged so as to be tiltable toward the upper side of the seat cushion. The upper support frame is rotatably connected to the lower support frame via a lock mechanism, and the lower support frame is tilted toward the upper side of the seat cushion, and the lock mechanism It is characterized in that by rotating and holding the upper support frame in a substantially vertical state, a child seat is formed with the back side or front side of the upper support frame serving as the seat back.

(Example) The structure of the vehicle seat bag according to the present invention will be described in detail below with reference to the drawings.

1, 2, and 3 schematically show an embodiment of the structure of a vehicle seat bag according to the present invention, and in this vehicle seat 1, a seat bag 3 is connected to a seat cushion 2. are connected via a reclining mechanism 4 so as to be tiltable back and forth. Cushion springs 7 are disposed on the seat cushion frame 5 of the seat cushion 2 and the seat back frame 6 of the seat bag 3, respectively, and cushion pads and upholstery are attached to these cushion springs 7, so that the seat cushion 2 and the seat bag are assembled. 3 are formed respectively.

The seat back frame 6 is an upper support frame 6.
The upper support frame 6a is rotatably connected to the lower support frame 6b via a lock mechanism 10, which will be described later.

FIG. 2 shows an outline of the frame structure of the vehicle seat 1, in which the seat cushion frame 5
A base 4a of the reclining mechanism 4 is fixed to the rear end, and an arm 4b is fixed to a bracket B1 provided at the bottom of the lower support frame 6b, and this arm 4b is rotatably connected to the base 4a. This reclining mechanism 4 is configured to be able to hold the seat bag 3 at a desired angle of inclination by a conventionally known locking means, and is also configured to be able to tilt toward the upper side of the seat cushion 2.

A bracket B2 is fixed to the upper part of both sides of the lower support frame 6b, a lower plate 11 constituting the lock mechanism 10 is fixed to this bracket B2, and a bracket B3 is fixed to the lower part of both sides of the upper support frame 6a. An upper plate 12, which together with the lower plate 11 constitutes the lock mechanism 10, is fixed to the bracket B3. A U-shaped wire 8 extending in the vertical direction is provided at the upper part of the back side of the upper support frame 6a and the lower support frame 6b.
As shown in FIG. 3, cushion pads are provided to cover the wires 8a and 8b, and side support portions 9a and 9b are provided.
are formed respectively.

(Function) Therefore, seat bag 3 is replaced by seat cushion 2.
If the upper side is held forward through the reclining mechanism 4, and the upper support frame 6a is rotated to a substantially perpendicular state with respect to the lower support frame 6b and held by the lock mechanism 10, as shown in FIG. Thus, a child seat 1' is formed on the back side of the seat bag 3, with the seat cushion 2' on the lower support frame 6b side and the seat bag 3' on the upper support frame 6a side. Also formed on the front side of the upper support frame 6a is a child seat 1', in which the front part of the seat cushion 2 is a seat cushion 2', and the front side of the upper support frame 6a is a seat back 3'. Further, the side support portions 9a and 9b provided on the upper support frame 6a and the lower support frame 6b, respectively, can safely hold the child. Furthermore, as shown by the imaginary lines in FIG. 3, safety can be further improved by locking the upper ends of the safety belt SB to the stays of the headrest H and locking the lower ends to the locking portions 2a at the rear end of the seat cushion 2. It can be improved.

(Embodiment) FIGS. 4 and 5 schematically show an embodiment of the lock mechanism 10, which is fixed to the upper bracket B2 of the lower support frame 6b and the bracket B3 of the upper support frame 6a, respectively. The lower plate 11 and the upper plate 12 have through holes 11a and 12a through which the rotating shaft 18 serving as the axial support of the upper support frame 6a passes, and involute internal teeth having different tip circles but the same number of teeth. Gear part 1
3 and 14 are formed respectively. In this embodiment, a case is shown in which the internal gear portion 13 of the lower plate 11 has a small diameter. Also, on the outside where the internal gear parts 13 and 14 of the lower plate 11 and the upper plate 12 are formed, cover parts 11b,
12b is integrally formed.

A plurality of stepped planetary gears 15 are disposed inside the cover parts 11b and 12b, and the planetary gears 15 have first and second gear parts that mesh with the small and large internal gear parts 13 and 14, respectively. 16 and 17 are arranged side by side in the axial direction. First and second gear parts 1
6 and 17 are formed in a stepped shape having different tip circles and numbers of teeth, as is clear from FIG.
These gear parts 16 and 17 are internal gear parts 13 and 14.
The structure is such that the involute tooth portions mesh with each other in accordance with each of the above, and rotation transmission that is reasonably smooth and has little play is achieved.

A control gear 19 meshes with one of the gear portions (17 side in this embodiment) of the planetary gear 15.
is supported by the rotating shaft 18 and is operated by rotating an operating knob 20 connected to the outer end of the rotating shaft 18. This locking mechanism 10 can be formed in pairs on the left and right sides using the rotating shaft 18 as a connecting rod. Reference numeral 21 is a stabilizer that holds each planetary gear 15 at its rotating location.

(Function) According to this configuration, by appropriately rotating the control gear 19 by rotating the operation knob 20, the upper plate 12 is controlled by the internal gear portion 14 on the upper plate 12 side via each planetary gear 15. Lower plate 11
It becomes possible to adjust the relative angle freely and steplessly. This relative angle is determined by the difference in the number of teeth between the first and second gear parts 16 and 17 of the planetary gear 15, and when the control gear 19 stops rotating, the upper plate 12 1
4. The first gear part 16 of the planetary gear 15 is meshed with the lower plate 11 via the second gear part 17, thereby being locked in the meshing position. The rotational operation of the operating knob 20 can be performed with a small operating force due to the deceleration effect of the planetary gear mechanism, and since each meshing part is in an involute meshing state, smooth rotation transmission with small play can be obtained. .

(Effects of the invention) According to the invention, the back frame of the seat bag is divided into two parts, an upper support frame and a lower support frame, which provides a reliable locking state at low cost and excellent operability. Since the upper support frame is rotatably connected to the lower support frame via a lock mechanism, the entire seatback can tilt and
The upper support frame side can be rotated to form a desired seating surface, and the lower support frame can be tilted toward the upper side of the seat cushion and the upper support frame can be rotated and maintained in a substantially vertical state. Ba,
A child seat with the seat back on the upper support frame side is formed on the back side and the front side of the upper support frame, respectively, and it is possible to obtain an economical seat back structure for a vehicle that allows a child to be seated safely. .

[Brief explanation of drawings]

1 to 3 each schematically show an embodiment of the structure of a vehicle seat bag according to the present invention. FIG. 1 is a perspective view of the vehicle seat, and FIG. 2 is an exploded perspective view showing the frame structure. Figures 3 and 3 are rear perspective views of the child seat formed, and Figures 4 and 5 show an embodiment of the lock mechanism.
FIG. 4 is an exploded perspective view, and FIG. 5 is an explanatory side sectional view. In the figure, 1... Vehicle seat, 1'... Child seat, 2... Seat cushion, 2'... Seat cushion of child seat, 3... Seat back, 3'... Seat back of child seat, 4 ... Reclining mechanism, 5 ... Seat cushion frame, 6 ... Seat back frame, 6a ... Upper support frame, 6b ... Lower support frame, 10 ... Lock mechanism, 11 ... Lower plate, 12 ... Upper part Plate, 13, 14...
...Internal gear portion, 15... Planetary gear, 18... Rotating shaft, 19... Control gear, 20... Operation knob.

Claims (1)

[Scope of utility model registration request] In the structure of a vehicle seat bag in which the seat bag is arranged so as to be tiltable toward the upper side of the seat cushion, the seat bag frame of the seat bag is formed by being divided into two parts, an upper support frame and a lower support frame, and the upper support frame is The lower support frame is rotatably connected to the lower support frame via a lock mechanism, the lower support frame is tilted toward the upper side of the seat cushion, and the upper support frame is rotatably held in a substantially vertical state by the lock mechanism. A vehicle seat back structure characterized in that a child seat is formed with the back side or front side of the upper support frame serving as the seat back.