JPS5941147Y2 - Seat reclining sofa - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a seat reclining device installed in a moving body such as an automobile, an aircraft, or a railcar.

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 rotating force cannot be supported by the meshing teeth alone, and there is a risk that the teeth may be damaged and the seat back 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.

Further, when the reclining device is installed on both sides to distribute the load, the locking/unlocking 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. The purpose is to obtain a reclining device that does not rotate.

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, 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 back 2, 9 is a base fixed to the seat cushion 3, 1
Reference numeral 1 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; 1
The spring support is made of material, in which a rotation support recess 13 of 0a 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 at small pitches in the respective through holes of the arm 8 and the base 9.
The inner diameter of the tooth 15 centered on the pin 10 is larger than the inner diameter centered on the pin 10 of the tooth 15, and is formed into a cone shape.

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 bracket fixed to the base 9, and 27 is a return spring suspended between the bracket 26 and the lever 25.

Reference numeral 30 denotes a stepped portion formed on the outer peripheral end portion 28.29 of the arm 8, and the stepped portion 30 is connected to the axis 32 between the fixing through hole 31 of the arm 8 to the seat back 2 and the pin 10.
It is placed on the extension line of

Further, a step portion 33 may be formed on the rear side of the step portion 30 at a position equal to or greater than the backward tilt angle limit of the reclining device 1.

Reference numeral 34 denotes a lock plate fixed to the base 9 so as to come into contact with the step portion 30.

In addition, 35 is an E ring that forms the spring receiver 12 and the ball pressing member 23 into a shell shape by fitting into the pin 10, and 36 is an E ring that forms the ball pressing member 23.
This is a plate inserted between the E-ring 35 and the E-ring 35.

Incidentally, the reclining device RD includes a pin 10, an intermediary member 11°, a spring support member 12, a spring 17, ball bearings 19, 21. Plate 22, ball pressing member 2
3. It is composed of a collar 24, a lever 25, a spring 27, an E-ring 35, a plate 36, 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 shown in FIG.

Therefore, the teeth 16 of the intermediary member 11 and the teeth 14 of the arm 8 are separated, resulting in an unlocked state, and the arm 8 becomes freely rotatable.

Next, when the lever 25 is returned to its original position (in other words, it is rotated by the spring 27 in the direction opposite to the direction of the arrow in FIG. The member 11, ball bearing 19, plate 22, and other ball bearings 21 return to the state shown in FIG. 3, and the teeth 16 of the intermediary member 11 and the teeth 14 of the arm 8 mesh with each other.

Therefore, the arm 8 is restricted from tilting. Note that the inclination angle of the arm 8 is such that the stepped portion 30 is aligned with the lock plate 3 as shown in FIG.
In some cases, the stepped portion 30 and the lock plate 34 are in contact with the lock plate 4, and in other cases, the stepped portion 30 and the lock plate 34 are separated from each other.

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 supporting the occupant, particularly in the anchor bolt 5 provided at the top of the seat back 2, with the reclining device RD as the pivot point.

This rotational force causes the teeth 14 and 16 to break, the arm 8 is released from its tilting restraint, rotates forward, the lock plate 34 collides with the stepped portion 30 of the arm 8, and the arm 8 no longer moves forward. This will prevent you from leaning forward.

Further, as described above, if the stepped portion 30 of the arm 8 and the lock plate 34 are in contact with each other from the beginning, the anchor bolt 5
Alternatively, even if a large rotational force is generated in the arm 8, the teeth 14 and 16 do not break and are engaged with each other, so that the inclination angle of the seat back 2 is maintained.

Since the present invention operates in this way, 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 intermediary member and the teeth of the arm, a locking plate that can withstand a large load is added. Safety belts, especially shoulder belts, can be incorporated into seatbacks.

Further, since the seat back can be sufficiently supported by one reclining device, the locking/unlocking operation is easy, and a reclining device with a simple structure can be obtained with almost no increase in production cost or weight.

[Brief explanation of drawings]

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 I- in Figure 2.
It is an explanatory diagram of an I-line cross section. 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 the material, 14...The tooth of the arm 8, 1
5...Teeth of base 9, 16...Teeth of intermediary member 11, 17...Sliding spring,
23...Ball holding member, 25...Operation lever, 27...Return spring, 2
8, 29... Outer peripheral end of arm 8, 30...
. . . Step portion of arm 8, 34 . . . Lock plate.

Claims (1)

[Scope of utility model registration request] An arm fixed to a seat back, a base fixed to a seat cushion, and a base having teeth on the outer periphery that can engage and disengage from each other in the left and right direction with teeth formed in through holes of the arms and the base, respectively. an intermediary member that rotatably and lockably supports an arm; a shaft that supports the intermediary member so as to be slidable in the left-right direction; and an intermediate member that holds one end of the shaft and whose periphery is fixed to the base. The provided spring receiver is rotatably supported on the other end of the shaft and has an operating lever, and rotation of the lever can push the teeth of the intermediary member in a direction away from the teeth of the arm. a ball pressing member provided on the arm; a sliding spring that is interposed between the spring receiver and the intermediate member and constantly biasing the intermediate member toward the ball pressing member; and a sliding spring formed on the outer peripheral end of the arm. a lock plate fixed to the base so as to be able to come into contact with the stepped portion; and a return spring stretched between the lever and the base and biased to press the ball pressing member against the lock plate. A seat reclining device characterized by comprising: