JPS5941146Y2 - Seat reclining sofa - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reclining device that allows a seat to be tilted forward, which is installed in a moving body such as an automobile, an aircraft, or a rail vehicle.

In general, reclining devices for seats in mobile vehicles are configured to adjust the inclination angle of the seat back by meshing teeth on the arm side and teeth on the base side, and the inclination angle can be finely adjusted depending on the physique and posture of the occupant. Therefore, the teeth in the meshing part are formed small.

Of course, these teeth are formed to be able to sufficiently withstand the load supporting the occupant and the seatback body.

Incidentally, in recent years, there have been many cases in which an anchor bolt on the shoulder side of the safety belt is provided at the top of the seat back in order to prevent the phenomenon of hanging due to the safety belt or to facilitate seat adjustment when the safety belt is attached.

However, in the case of such a structure, when a large force is applied such as a sudden impact such as a collision to a moving object and the occupant is thrown forward, the anchor bolt of the safety belt supporting the occupant, especially the top part of the seat back, An extremely large forward rotational force is generated in the anchor bolt provided in the reclining device with the reclining device as the fulcrum.

This rotational force cannot be supported by the meshing alone, and there is a risk that the teeth may be damaged and the seatback may rotate forward.

Of course, in such a case, the anchor bolt of the safety belt will also move forward, and the tension between the occupant and the safety belt will be released and relaxed, and the occupant will be thrown forward.

Furthermore, when the reclining device is provided on both sides to distribute the load, the lock/unlock operation is complicated, and the cost is twice as high and the weight is twice as much.

The present invention has been provided in view of the shortcomings of the conventional seat reclining device, and has a reclining device on only one side, a safety belt locking device in addition to the normal locking device, and a locking device for the seat belt when a large load is applied. There is a reclining device that can be tilted forward without rotating.

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, reference numeral 1 denotes a reclining device, which is attached to a seat back 2 and a seat cushion 3.

4 is the safety belt, and the anchor bolt 5 on the shoulder side on the negative side
is fixed to the top of the seat back 2, and an anchor bolt 6 on the other side is fixed to the seat cushion 3 and/or the floor panel 7.

The reclining device 1 has the following configuration.

That is, 8 is an arm fixed to the seat I back 2, 9 is a base fixed to the seat cushion 3,
Reference numeral 11 denotes an intermediary member that pivotally supports the arm 8 with respect to the base 9 so that the arm 8 can be rotated and locked; 10 represents a pin that is a shaft that supports the intermediary member 11 so as to be slidable in the left-right direction; and 12, one end of the pin 10; The spring holder is made of material, in which the rotation support recess 13 of 10a is formed, the cross section is substantially arcuate, and the periphery is fixed to the base 9.

A plurality of teeth 14 and 15 are formed with small pinches in the respective through holes of the arm 8 and the base 9.
Pin 10 of tooth 15 than the inner diameter centered on pin 10 of 4
It is formed into a cone shape with a larger inner diameter around the center.

Reference numeral 16 denotes cone-shaped teeth formed on the outer periphery of the intermediate member 11 that is pivotally supported by the pin 10, and has a shape that can mesh with the teeth 14 and 15.

Reference numeral 17 denotes a sliding spring inserted between a recessed portion 18 formed on one surface 11a of the intermediate member 11 and the spring receiver 12, which presses the intermediate member 11 to the left in FIG. ing.

Reference numeral 19 denotes a ball bearing 21 disposed substantially embedded in a recess 20 formed on the other surface 11b of the intermediary member 11;
23 is another ball bearing disposed opposite to the ball bearing 19 via a plate 22, and 23 is a ball retainer that is pivotally supported on the pin 10 via a collar 24 or the like and holds the ball bearing 21. The member 25 is a lever 2 integrally formed with the ball pressing member 23.
6 is a hinge pin fitted into a through hole 27 provided in the base 9 at a position where the pin 10 is suspended, and 28 is a step portion formed by recessing the outer peripheral end 29 of the arm 8 toward the pin 10 at the front end. The portion 30 and the rear end portion 33 are formed as surfaces in the same direction as the core direction of the pin 10.

The rear end portion 33 may be located at a position equal to or greater than the rear tilt angle limit of the reclining device 1.

Reference numeral 34 designates a lock plate pivotally supported by the hinge pin 26, and the tip portion 35 is formed in a shape capable of coming into contact with the front end portion 30 of the stepped portion 28, and the outer circumferential surface 28a of the stepped portion 28.
It also comes into contact with

36 is a guide pin, and a straight line 32 connects the front end 30 and the pin 10 of the arm 8, and a straight line 37 connects the junction point of the front end 30 to the tip 35 and the hinge pin 26.
The angle θ between the
00°) at an appropriate position on a straight line 37.

A return spring 38 is suspended between the guide pin 36 and the base of the operating lever 25, and biases the operating lever 25 in the opposite direction of the arrow in FIG.

A guide arm 39 projects downward from the ball pressing member 23, and its side 39a abuts the side of the guide pin 26.

In addition, 40 is an E ring which forms the spring receiver into a shell shape by fitting into the pin 10 and the material 12 and the ball pressing member 23, and 41 is an E ring that forms the ball pressing member 2.
3 and the E-ring 40.

Note that the reclining device RD includes a pin 10, an intermediary member 11. The spring receiver is made of material 12, spring 17, ball bearing 19.21. Plate 22, ball pressing member 23
, a collar 24, a lever 25, a spring ring 38, an E-ring 40, a plate 41, etc.

Since the present invention has such a configuration, the operation of the present invention will be explained next.

When lever 25 is lifted in the direction of the arrow in Fig. 2, pin 1
0 in the clockwise direction, and the lever 25 and the inner wall of the ball holding member 23 integrated with the other ball bearing 2
1 is moved in the direction of the arrow in FIG. 3 against the sliding spring 17, and the intermediate member 11 is also moved by the ball bearing 19
It is pressed by another ball bearing 21 via the plate 22 and moves in the direction of the arrow.

As a result, the teeth 16 of the intermediary member 11 and the teeth 14 of the arm 8 are disengaged, so that the locking device becomes unlocked.

Further, when the lever 25 is lifted and rotated clockwise around the pin 10, the guide arm 39 presses the guide pin 36 against the return spring 38, and the lock plate 34 As shown in the figure, it is rotated counterclockwise about the hinge pin 26, and the tip 35 is separated from the front end 30 of the step 28.

Further, the lower end 39b of the guide arm 39 is connected to the guide pin 36.
is being pressed.

In this state, the arm 8 is rotatable, and the seat back 2 can of course be tilted forward.

Next, when the lever 25 is returned to its original position (in other words, it is rotated by the return spring 38 in the direction opposite to the arrow direction in FIG. 2), the pressing force on the other ball bearings 21 is removed, so the sliding spring 17 due to the tension of the intermediate member 11. Ball bearing 19, plate 22
At the same time, the other ball bearings 21 return to the state shown in FIG.
4 meshes.

At this time, the guide pin 36 detached from the lower end 39b of the guide arm 39 is rotated clockwise around the hinge pin 26 by the return spring 38, and the tip portion 35 comes into contact with the outer circumferential surface 28a of the stepped portion 28 or faces forward. Engages end portion 30.

Therefore, the arm 8 is restrained from tilting.
As shown in FIG. The front end 30 of the lock plate 34 is connected to the front end 35 of the lock plate 34.
In some cases, the arm 8 may be spaced apart from the rear (that is, the arm 8 is tilted rearward as compared to FIG. 2), and is appropriately selected depending on the seating posture of the occupant.

When the tilting of the arm 8 is restrained, when a sudden and large impact energy is generated on the moving object such as a vehicle due to a collision, a large force is applied to the occupant, such that the occupant is thrown forward.

At this time, a very large forward rotational force is generated in the anchor bolt of the safety belt 4 that supports the occupant, particularly in the anchor bolt 5 provided at the top of the seat back 2, with the reclining device RD as the fulcrum.

This rotational force causes the teeth 14 and 16 to break, the arm 8 is released from its tilting restraint, rotates forward, and the lock plate 34 collides with the front end 30 of the step 28 of the arm 8. , the arm 8 will no longer tilt forward.

Further, as described above, the front end 3 of the stepped portion 28 of the arm 8
If 0 and the lock plate 34 are in contact from the beginning,
Even if a large rotational force is generated in the anchor bolt 5 or the arm 8, the front end 30 of the stepped portion 28 of the arm 8 and the lock plate 34 absorb the force, so the teeth 14 and 16 will not be damaged. , are engaged to maintain the inclination angle of the seat back 2.

Also, at this time, the angle θ between the straight line 32 and the straight line 37 is 9
Since the angle is between 0° and 140°, the lock plate 34 works to maintain balance relative to the rotational load direction of the arm 8 about the pin 10.

Since the present invention operates in this manner, the effects of the present invention will be explained next. In addition to the usual locking device, that is, the engagement between the teeth of the intermediate member and the teeth of the arm, a locking plate that can withstand a large load is added. Therefore, safety belts, especially shoulder belts, can be integrated into the seat back.

Furthermore, since the seat back can be sufficiently supported by one reclining device, the locking/unlocking operation is easy, and the reclining device with a simple structure can be used without any increase in production cost or weight.

[Brief explanation of the drawing]

FIG. 1 is a perspective explanatory view of a seat according to an embodiment of the present invention;
Figure 2 is an explanatory view of the arrow in Figure 1, and Figure 3 is an illustration of ■- in Figure 2.
(2) Line cross-sectional explanatory diagram, FIG. 4 is an operational explanatory diagram corresponding to FIG. 2. In the figure, 1... Reclining device, 2...
... Seat back, 3... Seat cushion,
8...Arm, 9...Base, 10.
...Axis, 11...Intermediate member, 12...
...The spring holder is a material, 14.15.16...teeth,
17...Sliding spring, 23...
... Ball holding member, 25 ... Operation lever, 2
6...Hinge pin, 28...Step part, 3
0... Front end, 32... Straight line, 34
. . . Lock plate, 35 . . . Tip, 38 . . . Return spring.

Claims (1)

[Scope of utility model registration request] An arm fixed to the seat back, a base fixed to the seat cushion, and teeth formed on the outer periphery that can freely engage and disengage in the left-right direction with teeth formed in through holes of the arms and the base, and an intermediary member that rotatably and pivotally supports the arm relative to the base via the teeth; a shaft that supports the intermediary member so as to be slidable in the left-right direction; and one end of the shaft that is held; A spring support whose periphery is fixed to the base is rotatably supported on the other end of the shaft and has an operating lever, and rotation of the lever causes the teeth of the intermediate member to engage the teeth of the arm. A ball holding member provided so as to be able to be suppressed in a direction in which the arm comes off, a sliding spring that is interposed between the spring receiver and the intermediate member and constantly biasing the intermediate member toward the ball holding member, and The tip portion can be engaged with a front end portion of a stepped portion formed at the outer peripheral end portion, and the front end portion
A lock plate is rotatably supported via a hinge pin on a base located 90 degrees to 140 degrees below the straight line connecting the shafts, and the tip of the lock plate is pressed against the front end of the step. A seat reclining device comprising a return spring suspended from a ball holding member and a lock plate.