JPS6353049B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a seat reclining device, and more specifically, a reclining device for a seat. This invention relates to a seat reclining device that prevents a backrest from tilting backward.

When the backrest of the seat is tilted backwards, if there is an obstacle behind the backrest, the backrest naturally comes into contact with the obstacle. In this case, if the backrest is further forcefully pushed backwards, the obstacle or the backrest will be damaged. For example, if this is a front seat of a car, the backrest will hit the knees of the person sitting in the rear seat. In this case, if the backrest is further pushed backwards, it is dangerous because the knees may be injured.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned conventional drawbacks, an object of the present invention is to provide a seat that senses when the back side of the seat back comes into contact with an obstacle and prevents the backrest from tilting further backwards. To provide reclining equipment.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.
The reclining device of the present invention shown in FIG.
have. This sensing plate 2 has a connecting rod 4 shown in FIGS. 2a and 2b disposed in a portion 3 indicated by a dotted line in the upper part thereof. A receiving plate 5 is attached to the right end of the connecting rod 4, and this receiving plate 5 is disposed inside the sensing plate 5 and abuts against the right inner wall of the sensing plate 2. The left end of the connecting rod 4 passes through the upper end of a support plate 6 having an L-shaped cross section and is fixedly disposed inside the backrest 1, and then is bent downward and passes through the horizontal part of the support plate 6. It is inserted into a long hole 6a formed in. A compression coil spring 7 is disposed between the receiving plate 5 and the support plate 6 at the right end of the connecting rod 4, and this pushes the connecting rod 4 to the right, and the sensing plate 2 also moves to the right. The sensing plate 2 is separated from the backrest portion 1 by being pushed in the opposite direction. Therefore, in this state, the bent lower end of the connecting rod 4 is located near the right end of the elongated hole 6a. Further, a connecting wire 8 is attached to the middle of the bent portion of the connecting rod 4, and this connecting wire 8 is inserted through the guide tube 9 and extends downward.

Figures 3a, b, and c show a reclining mechanism used in the reclining device of the present invention, and the connecting wire 8 shown in Figures 2a and b is connected to this reclining mechanism. As shown in FIG. 1, the reclining mechanism shown in FIGS. 3a to 3c is attached to a base plate 11 disposed at the connection between the backrest 1 and the seat 10,
The lower end of the arm 13 is rotatably attached to a rotation shaft 12 attached to the base plate 11. The upper end portion of the arm 13 is fixed to the side surface of the backrest portion 1.

As shown in FIGS. 3a to 3c, a lock member 14 is integrally attached to the lower end of the arm 13 attached to the rotation shaft 12.
The arm 13 also rotates around the rotation axis 12 together with the arm 13. And this lock member 14
A locking tooth 14a is formed at the lower end of the locking member 15, and a locking tooth 15a of a locking member 15 is arranged to engage with the locking tooth 14a. Locking member 15
In FIGS. 3a to 3c, the left end portion is rotatably supported by a pin 16. Connecting wire 8
As shown in FIG. 3a, the guide tube 9 into which the
It extends to a position overlapping the locking member 15, and a connecting wire 8 comes out from the tip thereof (in FIGS. 3b and 3c, the guide tube 9 is omitted and the wire 8 is
has been omitted). A release member 19 having a handle 18 for operating the reclining device and a blocking member 20 are attached to the right side of the locking member 15 by a pin 17. A pin 21 is fixed to the lower end of this blocking member 20, and a roller 22 is rotatably attached to this pin 21. As can be clearly seen from FIGS. 3b and 3c, one end of an extension coil spring 23 is attached to this pin 21, and the other end of this coil spring 23 is
Projection piece 19a formed in the middle of release member 19
, thereby causing the blocking member 20 to be attached to the pin 17
However, the lower right end of the blocking member 20 comes into contact with the projection 19a and its rotation is restricted, as shown in FIGS. 3a and 3b. The release member 19 and the blocking member 20 are positioned so as to overlap. A pin 24 is also located at the middle of the blocking member 20 near the upper left.
is firmly planted, and this pin is located above the right end of the locking member 15. Furthermore, the release member 1
An extension coil spring 27 is hung between a pin 25 fixed to the lower end of the base plate 11 and a pin 26 fixed to the lower left part of the base plate 11, and the release member 19 is rotated clockwise around the pin 17. It is biased to rotate. However, as shown in FIG. 3a, the rotation of the release member 19 is restricted because the roller 22 comes into contact with the lower end of the locking member 15. The elongated hole 28a of the ring member 28 attached to the other end of the connecting wire 8 is engaged with the pin 21.

As described above, the reclining device of the present invention is configured. Next, its effect will be explained.

In order to tilt the backrest 1 of the seat to which the reclining device of the present invention shown in FIG. 1 is applied, the operating handle 18 is lifted upward against the force of the spring 27 as shown in FIG. , the release member 19 is rotated counterclockwise around the pin 17. Then, the blocking member 20 is also pulled by the coil spring 23 and rotates counterclockwise about the pin 17 together with the release member 19. the result,
The locking member 15 is pushed downward by the pin 24, and the locking teeth 15 of the locking member 15, which were engaged with the locking teeth 14a of the locking member 14, as shown in FIG.
a is disengaged as shown in FIG. 3b. In this state, the backrest portion 1
is rotatable around the rotation axis 12 together with the arm 13 and the lock member 14. Note that the reclining mechanism generally includes a biasing means such as a spring (not shown), which biases the backrest portion 1 to rotate forward. Therefore, in general, when the lock mechanism becomes disengaged as described above, the backrest 1 tends to rotate forward about the rotation axis 12, so that it is tilted backward to a desired position. In order to move the seat to a desired position, the backrest portion 1 is pushed backward by the back of the seater or the like to tilt it to a desired position. When the operating handle 18 is released at that position, the release member 19 and the blocking member 20 are moved from the pin 17 by the force of the spring 27.
The locking member 15 is rotated clockwise around the locking member 14, and the locking member 15 is pushed upward by the roller 22, and the locking teeth 15a of the locking member 15 are locked with the locking teeth 14a of the locking member 14.
to lock the arm 13 and the backrest part 1 in their desired tilted position. In the above operation, the pin 21 on the blocking member 20 moves from the left end position shown in FIG. 3a to the long hole 28a of the ring member 28 attached to the other end of the connecting wire 8, as shown in FIG. 3b. It only moves to the right end position and does not particularly affect the connecting wire 8.

The above operations are general operations of the reclining mechanism shown in FIGS. 3a to 3c. Next, in the reclining mechanism that operates as described above, the operation when the backrest portion 1 comes into contact with the knee 30 or the like at the rear will be explained.

As shown in FIG. 3b, lift the operating handle 18 upwards and lock the locking member 14 and the locking member 15.
When the backrest 1 is tilted backwards and the sensing plate 2 provided on the back side of the backrest 1 comes into contact with the knee 30, as shown in FIG. The sensing plate 2 is pushed forward. As a result, the receiving plate 5 attached to the right end of the connecting rod 4 shown in FIGS. 2a and 2b is pushed by the inner wall of the sensing plate 2,
The connecting rod 4 moves to the left against the force of the spring 7.
As a result, the connecting wire 8 attached to the bent part of the connecting rod 4 is also pulled to the left, and the ring member 28 attached to the right end changes from the state shown in FIG. 3b to FIG. 3c. Move left to the state shown. As a result, in FIG. 3b, the ring member 28
The pin 21 at the right end of the elongated hole 28a is connected to the spring 2
The blocking member 20 is pulled to the left against the force of 3.
and moves together with the roller 22 to the position shown in FIG. 3c. At this time, the locking member 15 is
The lower right end of is pushed upward, and its locking tooth 15a
engages with the lock teeth 14a of the lock member 14 to prevent the arm 13 and the backrest portion 1 from rotating.
As a result, the backrest portion 1 cannot tilt any further rearward, thereby preventing the knees 30 from being injured.

4a and 4b show that the mechanism shown in FIGS. 2a and 2b is installed at the lower end of the backrest 1, and the upper end of the sensing plate 2 is rotated to the bracket 1A on the back of the backrest 1. The receiving plate 5 is positioned opposite the inner surface of the lower end of the sensing plate 2, and the connecting rod 4 is attached to the receiving plate 5.
The connecting rod 4 is passed through the support plate 6 fixed to the arm 13 and bent toward the arm 13, and one end of the connecting wire 8 is attached to this bent portion. The connecting wire 8 is inserted into the guide tube 9 as in the previous embodiment, and its tip is attached to the pin 21 of the operating handle 18. When the knee 30 comes into contact with the sensing plate 2, the lower end of the sensing plate 2 pushes the receiving plate 5, and when the receiving plate 5 is pushed, the connecting rod 4 is pushed in as shown by the arrow in FIG. 4b, and the connecting wire Pull 8. When the connecting wire 8 is pulled, the released engagement of the reclining mechanism will be engaged again, and the backrest portion 1 will no longer fall down. By arranging the connecting wire downward in this way, the length of the connecting wire can be shortened.

As explained above, according to the present invention, the sensing device provided on the back side of the backrest detects when the back side of the backrest comes into contact with an obstacle such as a knee, and the backrest moves forward. Since it is prevented from rotating backwards, there is no danger of the backrest portion hurting the knees or the like.

Furthermore, even if, for example, a person in the front seat encounters a collision while driving and a person or object in the back seat hits the sensing plate on the backrest, the reclining function of the present invention There is no danger as the device is immediately locked.

The reclining device of the present invention uses the locking mechanism of the reclining mechanism to lock the movement of the backrest, so it has a simple structure and operates reliably.

[Brief explanation of the drawing]

FIG. 1 is a side view of a seat to which a seat reclining device according to an embodiment of the present invention is applied, and FIGS. 2a and 2b are a partially enlarged side view and a perspective view of the reclining device of FIG. Figure 3 a, b,
c is an enlarged side view showing the operating mode of the reclining device in FIG. 1, and FIGS. 4a and 4b are
They are a side view and a partially enlarged perspective view, respectively, of a seat to which a reclining device according to another embodiment of the present invention is applied. 1... Backrest part, 2... Sensing plate, 4... Connecting rod, 5... Receiving plate, 8... Connecting wire, 10...
Seat portion, 11... Base plate, 12... Rotating shaft, 13... Arm, 14... Lock member, 14
a... Lock tooth, 15... Locking member, 15a...
Locking teeth, 18... operating handle, 19... release member, 20... blocking member, 22... roller.

Claims (1)

[Claims] 1. The arm 13 of the backrest portion 1 is rotatably attached to the base plate 11 of the seat portion 10, and the arm 13
In a seat reclining device equipped with an operating handle 18 for releasing the engagement between the locking teeth 14a provided on the base plate 11 and the locking teeth 15a of the locking member 15 provided on the base plate 11, when the backrest 1 of the seat is tilted backwards. To,
A sensing plate 2 that is pushed when the back side of the backrest 1 comes into contact with an obstacle behind the backrest 1; and a locking tooth 1 that is activated by the pushing of the sensing plate 2.
4a and the locking tooth 15a, the locking member 15 is rotated to disengage the locking tooth 14a and the locking tooth 15.
The lock mechanism operating means connects a member that operates in response to the pushing movement of the sensing plate 2 and a member that rotates the locking member 15 with a connecting wire 8. The seat reclining device is characterized in that the connecting wire 8 is pulled to rotate the locking member 15 and engage the locking teeth 14a and 15a.