JPS6236664Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a seat hinge structure.

Conventional vehicle seats, particularly seat backs, are simply folded forward and overlapped onto the seat cushion, or simply folded back and made substantially flat with the seat cushion, and the seat back is fixed or fixed relative to the seat cushion in the longitudinal direction. In the case of a seat hinge structure in which the release is performed by both hinge parts, there are usually two operation levers, and when one operation lever is operated, the seatback can be rotated forward, and when the other operation lever is operated, the seatback can be rotated forward. Since it was constructed so that it could be rotated backwards, there were problems in that it was complicated to operate and could lead to erroneous operations. Furthermore, due to manufacturing errors in the hinges, assembly errors, twisting of the seat, etc., one hinge may be unlocked while the other hinge is in the locked state, resulting in a delay in operation. Ta.

The present invention was devised to solve the above-mentioned problems, and embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 6. Reference numeral 1 denotes a seat cushion frame in which U-shaped sheet metal members 3 are fixed to both ends of a pipe 2 bent into a U-shape, and the sheet metal members are connected by a frame 4 having a U-shaped cross section; 5 is a U-shaped sheet metal member 3; This is a seat bag frame in which both ends of a bent pipe 6 are connected by a pipe 7, and L-shaped sheet metal members 8 are fixed to both ends of the pipe 6, respectively. A pin 9, which is a first projection, is fixed to the sheet metal member 8, and a stepped pin 10 having a spring (not shown) engraved on the inner peripheral surface of the tip thereof is fixed, and a small diameter portion 11 of the stepped pin is fixed.
The upper end of a plate-shaped bracket 12 is pivotally supported by interposing a plain washer 13 and a spring washer 14 and screwing a bolt 15 into a screw (not shown) of the stepped pin 10. The lower end of the frame 1 is pivotally supported by the frame 1 via a connecting rod 27, which will be described later. Further, the bracket 12 is engaged with the pin 9 through a notch 16 formed in the bracket, so that in FIG. 2, the frame 5 rotates counterclockwise with respect to the bracket 12, but not clockwise. It is configured. Further, a hook 18 is pivotally supported on the bracket 12 via a rivet 17, and the hook cooperates with the notch 16 of the bracket 12 to lock the pin 9 so as to clamp it, and is externally fitted onto the rivet 17. The hook 18 is biased counterclockwise in FIG. 2 by a coil spring (not shown), and a pin 19, which is a second projection, is fixed to the hook 18. On the other hand, a first pin 20 is fixed to the sheet metal member 3 of the frame 1, with a screw (not shown) carved into the inner peripheral surface of the tip and having a step at the tip.One end of the lock 21 is attached to the small diameter portion of the first pin. It is pivotally supported by screwing a bolt 24 into a screw (not shown) of the first pin 20 via a plain washer 22 and a spring washer 23. A second pin 25 is fixed to the other end of the lock 21, and the second pin slidably engages with a long hole 26 formed in the sheet metal member 3, and is fitted onto the first pin 20 (not shown). The coil spring biases the lock 21 in a clockwise direction in FIG. Further, when the second pin 25 is located at the upper end of the elongated hole 26, the lower end of the bracket 12 is held between the first pin 20 and the second pin 25, so that the bracket 12 cannot rotate around a connecting rod 27, which will be described later. It is composed of Sheet metal members 3 and 3 of frame 1
A connecting pipe 28 in which a connecting rod 27 serving as a connecting member is rotatably fitted substantially coaxially is supported rotatably around its own axis, and the connecting pipe is fixed to the end of the connecting pipe 28. Arm 29
It is locked to the bracket 12 by inserting a locking claw 30 formed by bending the tip of the bracket into a locking hole 31 formed in the bracket 12. In addition,
The connecting member 28' is composed of a connecting pipe 28 and an arm 29. Both ends of the connecting rod 27 protrude outwardly through the connecting pipe 28, respectively, and pass through a hole 32 formed in the bracket 12 so as to be rotatable about its own axis, and further protrude from the hole. is formed into an oval-shaped cross section 33, and a plate 34, which is a lock release member, is attached to the connecting rod 27 in the oval-shaped portion.
It is externally fitted so as to rotate integrally around the axis of the connecting rod. A pipe-shaped spacer 35 is fitted onto the connection rod 27 on the outside of the seat of the plate 34, and a lever 37, which is an operating member, is attached to the end of the spacer so as to clamp a resin hinge cover 36. The lever is fitted onto the end of the connecting rod 27 (not shown).
It is fixed to the connecting rod 27 by inserting a plain washer 38 and a spring washer 39 into a screw cut into the inner circumferential surface of the end thereof, and screwing a bolt 40 into the screw. The connecting rod 27 is biased by a coil spring (not shown) so that the lever 37 rotates counterclockwise in FIG. 2, and the plate 34 comes into contact with the first pin 20 to prevent the rotation. Furthermore, the difference in the hinge structure on the left and right sides of the seat is that, as shown in Figure 3, the hinge structure on the left side of the seat has a lever 37, while the
As shown in the figure, the lever 37 is not included in the hinge structure on the right side of the seat, and the rest of the structure is exactly the same. The operation of the hinge structure will be described below with reference to FIG. 6. When the lever 37 is rotated clockwise from the solid line position to the dashed-dotted position, the left and right plates 34 are moved together via the connecting rod 27 from the solid line position to the dashed-dotted position. Rotate clockwise to position. At this time, the upper end surface 42 of the plate 34 presses the pin 19 of the hook 18 and rotates the hook 18 clockwise from the solid line position to the dashed-dotted line position, and the hook 18 and pin 9 are unlocked, and the frame 5 of the seat bag is released. can fall forward. Further, when the lever 37 is rotated clockwise from the one-dot chain line position to the two-dot chain line position, the left and right plates 37
are integrally rotated clockwise via the connecting rod 27 from the one-dot chain line position to the two-dot chain line position. At this time, the inclined surface 43 of the plate 34 is
By pressing the pin 25 and rotating the lock 21 counterclockwise from the one-dot chain line position to the two-dot chain line position, the lock between the bracket 12 and the second pin 25 is released, and the frame 5 of the seat bag and the bracket 12 are integrated. It can be thrown backwards. In addition, frame 5
When the frame 5 is tilted backward, the projecting surface 44 of the bracket 12 comes into contact with the first pin 20 of the lock 21, and the frame 5
is prevented from rotating further backwards.

Conversely, when returning the frame 5 that has fallen forward to the seated state, rotate the frame 5 clockwise with the lever 37 rotated clockwise to the dashed line or further, so that the pin 9 moves into the notch 1 of the bracket 12.
When the lever 37 is released while in contact with the lever 37, the lever returns to the solid line position due to the biasing force of a coil spring (not shown), and the frame 5 returns to the seated state. In addition, when returning the frame 5 that has fallen backwards to the seated state, rotate the lever 37 clockwise along the two-dot chain line or more, and then rotate the frame 5 counterclockwise together with the bracket 12 so that the lower end rear surface of the bracket 12 is rotated. When the lever 37 is released with the lever 45 in contact with the first pin 20 of the lock 21, the lever returns to the solid line position and the frame 5 is placed in the seated state.

According to the present invention, the frame 5 of the seat bag is configured to be locked in the front and rear directions, and the frame 5 can be unlocked in both the front and rear directions by simply operating one lever 37 in one direction. It is easy to operate and there is no need to worry about erroneous operation, and compared to conventional structures, only one lever is required, resulting in lower costs.

Furthermore, the left and right brackets 12 are connecting pipes 28.
For example, when the frame 5 is tilted backward, even though one of the left and right hinges is released from the locked state, the other hinge remains in the locked state. This has the effect that it is possible to prevent delays in operation due to slow operation.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention in which the lever 37 is omitted from the hinge on the left side of the seat;
Figure 2 shows the first position with the lever 37 attached.
FIG. 3 is a view along the arrow line in FIG. 2, FIG. 4 is a sectional view taken along the line shown in FIG. An arrow view corresponding to FIG. 3 showing the hinge on the right side of the seat,
FIG. 6 is an explanatory diagram of the operation of the hinge shown in FIG. 2. 1: Seat cushion frame, 5: Seat bag frame, 9: Pin (first protrusion), 1
2: Bracket, 18: Hook, 19: Pin (second protrusion), 20: First pin, 21: Lock, 2
5: second pin, 26: long hole, 27: connecting rod (connecting member), 28': connecting member, 34: plate (unlocking member), 37: lever (operating member).

Claims (1)

[Scope of utility model registration request] a plate-shaped bracket having an upper end pivotally supported to the side of the lower end of the seat bag and a lower end pivotally supporting the seat cushion and engaging with a first protrusion provided on the seat bag; a hook that locks on the first projection so as to clamp the first projection in cooperation with the locking portion and has a second projection, one end of which is pivotally supported on the seat cushion via a first pin; The end is slidably engaged with an elongated hole formed in the seat cushion via a second pin, and is attached by an elastic member so that the second pin is located at one end of the elongated hole. further, when the second pin is located at either end of the elongated hole, the lower end of the bracket is held between the first pin and the second pin, and the bracket is rotated around the pivot portion of the seat cushion. a lock that is pivotally supported on the seat cushion and that prevents the second protrusion and the second
In a seat equipped with a pair of hinges made up of lock release members configured to be able to press a pin, an operating member is provided on one of the pair of lock release members, and the lock release members of the same pair rotate integrally. A hinge structure for a seat, characterized in that the pair of brackets are connected by a connecting member so as to rotate together, and further connected by a connecting member so that the pair of brackets rotate integrally.