JP3156915B2 - Vehicle seat rotation adjustment mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation adjusting mechanism for a vehicle seat which supports a seat body on a floor of a vehicle cabin so as to be rotatable. More specifically, the mechanism is fixed to the floor of the vehicle cabin. A lower base having a circular opening formed therein, and a peripheral portion of a circular opening formed in conformity with the lower opening at the peripheral edge of the circular opening are arranged in a slidably rotatable state and the sheet body is fixed. An upper base, and a holder member formed with a circular opening peripheral edge that slidably holds the peripheral edge of the circular opening of the upper base between the peripheral edge of the circular opening on the lower base side. The present invention relates to an improvement in a rotation adjustment mechanism of a vehicle seat having the same.

[0002]

2. Description of the Related Art Conventionally, there has been known a rotary type vehicle seat which employs a structure in which the direction of the seat can be changed and adjusted according to the preference and demand of a seated person. That is, this kind of rotary type vehicle seat has a structure in which a rotation adjusting mechanism such as a face-to-face type or a shaft-up rotary type is interposed between the seat body floor surface below the seat body. Has been proposed in the past.

For example, Japanese Unexamined Utility Model Publication No. 63-83058 discloses an upper base for supporting a seat body and a lower base mounted on the floor of a passenger compartment. By laminating and combining them in a slidable and rotatable state, a rotating unit configured to support the upper base so as to be relatively rotatable on the lower base is configured, and both bases are held at a predetermined rotating position. A rotary seat configured to be locked by locking means such as a latch to prevent rotation is disclosed.

According to such a rotary seat,
The seat body placed on the upper base by operating the locking means from the outside to adjust the rotation of the upper base relative to the lower base and locking the locking means at a predetermined location by the locking means. Can be adjusted in any direction.

[0005] As shown in FIG. 5, a step L2 is formed on the peripheral edge L1 side of the circular opening of the lower base L.
2 is fitted with the peripheral portion A1 of the circular opening of the upper base A, and in this state, the holder member P is connected to the peripheral portion P1 of the circular opening.
There is a configuration in which the screw B is fixed on the side.

[0006]

However, in the case of the structure shown in FIG. 5, the size of the peripheral portion A1 of the circular opening of the upper base A and the size of the step portion L2 of the lower base L depend on the size of the upper base A. Is determined, the accuracy of the peripheral portion A1 of the circular opening of the upper base A and the step portion L2 of the lower base L is required, and there is a disadvantage that it is difficult to secure the accuracy and the cost increases.

When the accuracy of the peripheral portion A1 of the circular opening of the upper base A and the accuracy of the step L2 of the lower base L do not match, the upper base A has a play in the vertical and horizontal directions and a stable rotation adjusting mechanism. Could not be obtained.

SUMMARY OF THE INVENTION It is an object of the present invention to simply configure a rotation adjusting mechanism comprising a lower base, an upper base and a holder member with a minimum necessary number of parts, and to rattle the upper base in the front-back, up-down, and rotation directions. It provides a rotation adjustment mechanism for a vehicle seat that can be stably held without any problems, can reduce the rotational operation force, can improve the vertical rigidity, and is inexpensive. is there.

[0009]

According to a first aspect of the present invention, there is provided a rotation adjusting mechanism for a vehicle seat, comprising: a lower base having a circular opening fixed to a floor side of a passenger compartment; The upper base to which the peripheral portion of the circular opening formed corresponding to the peripheral opening is slidably rotatable and arranged so as to be slidably rotatable and to which the sheet body is fixed, and the peripheral portion of the circular opening of the upper base are A rotation member for a vehicle seat, comprising: a holder member having a peripheral edge portion of a circular opening slidably held between the peripheral portion of the circular opening on the lower base side; A first rolling member is inserted into a groove formed at a position opposite to a peripheral portion of the upper base and a peripheral portion of the circular opening of the upper base, and a peripheral portion of the circular opening of the upper base and a circular opening of the holder member are inserted. A second rolling member is inserted into a groove and an inclined portion respectively formed at opposing positions of a peripheral edge of the upper portion, and a groove of an upper base that inserts and holds the second rolling member forms a step portion of the upper base. An outer peripheral edge formed at a corner portion which is a position continuous from the lower end of the vertical portion to be formed to the inner peripheral edge portion, and the inclined portion of the holder member holding the second rolling member is formed of the vertical portion of the holder member. Is formed so as to be continuous with the lower end.

According to the rotation adjusting mechanism for a vehicle seat according to the first aspect of the present invention, the grooves formed respectively at the opposing positions of the peripheral portion of the circular opening of the lower base and the peripheral portion of the circular opening of the upper base. A first rolling member is inserted into the groove, and a second rolling member is formed in a groove and an inclined portion respectively formed at positions facing the peripheral edge of the circular opening of the upper base and the peripheral edge of the circular opening of the holder member. The groove of the upper base that is inserted and inserts and holds the second rolling member is formed at a corner that is a position that is continuous from the lower end of the vertical part that forms the step of the upper base to the inner peripheral edge, Since the inclined portion of the holder member holding the second rolling member is formed continuously with the lower end of the outer peripheral edge formed by the vertical portion of the holder member, there is a possibility that the upper base will rattle in the vertical and horizontal directions. Is Ku, it is possible to smoothly rotate the upper base, and further capable of outer peripheral edge portion comprising a vertical portion of the vertical portion and the holder member to form a stepped portion of the upper base to improve the vertical rigidity.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotation adjusting mechanism for a vehicle seat according to the present invention will be described below in detail with reference to the drawings. 1 to 4
1 shows an example of an embodiment of the present invention. A vehicle seat 1 shown in FIG. 4 includes a seat cushion 2 and a seat back 3 erected on a rear end side. A headrest is provided at the upper end of the seat back 3 and a reclining mechanism (not shown) for supporting the seat back 3 so as to be adjustable in tilt with respect to the seat cushion 2.
Are provided.

In such a seat 1, between the seat cushion 2 and the floor of the cabin below the seat cushion 2, the entire seat 1 is rotationally adjusted about the center of the seat as a center of rotation, so that the direction of the seat can be arbitrarily adjusted. A mechanism 10 is provided.

As is apparent from FIGS. 1 and 4, the rotation adjusting mechanism 10 has a lower base 11 having a circular opening 12 and an upper having a circular opening 14 rotatably supported by the lower base 11. A base 13 and a holder member 15 for slidably holding the upper base 13 on the lower base 11 side are provided.

A step 11b is formed on the inner peripheral edge 11a of the lower base 11 on the side of the circular opening 12. A circular opening 1 of the upper base 13 is provided outside the step 11b.
The inner peripheral edge 13a on the fourth side is located.

As shown in FIG. 3, a circular opening 16 is formed in the holder member 15, and an inner peripheral edge 15a on the side of the circular opening 16 is fixed to the inner peripheral edge 11a of the lower base 11 by fixing means 18 composed of bolts and nuts. The upper base 13 is slidably held between the lower base 11 and the holder member 15.

In the embodiment of the present invention, a latch bracket 21 is fixed to the upper base 13 side, and a latch 22 is provided on the latch bracket 21 as locking means.
Can be restricted at a predetermined position.

The lower end of an outer peripheral edge 15b formed of a vertical portion of the holder member 15 has an inclined portion 15 which is inclined obliquely.
c are continuously formed. In addition, this holder member 1
A vertical portion 13b that forms a step is formed at an intermediate portion of the upper base 13 facing the outer peripheral edge portion 15b composed of the vertical portion of No.5.

A groove 11c is formed outside the step 11b of the inner peripheral edge 11a of the lower base 11 on the side of the circular opening 12, and as shown in FIG. 2, an inner peripheral edge 13a of the upper base 13 on the side of the circular opening 14 is provided. The groove 11c on the bottom side of the
A groove 13c is formed at a position opposite to the groove 13c. Also, an inclined portion 15c of the holder member 15 is provided between the lower end of the vertical portion 13b forming the step portion of the upper base 13 and the groove 13c.
A groove 13d, which is a recess when viewed from the side, is formed.

A plurality of first rolling members 25 made of balls are inserted at positions where the groove 11c of the lower base 11 and the groove 13c of the upper base 13 face each other. Also, the vertical portion 1 forming the step portion of the upper base 13 is formed.
A plurality of second balls are formed in grooves 13d formed at corners which are positions continuous from the lower end of 3b to the inner peripheral edge 13a.
The plurality of rolling members 27 are held by the inclined portions 15c of the holder member 15 facing each other, as shown in FIG.

As shown in FIG. 4, the first rolling member 25
May be held by a holder 31 having a plurality of ball holes 32 formed thereon, and the second rolling member 27 may be held by a holder 34 having a plurality of ball holes 35 formed therein.

It should be noted that the present invention is not limited to the above-described embodiment, and the shape, structure, and the like of each part of the seat 1 can be freely modified and changed as necessary, and various modifications are possible. Like. For example, in the above-described embodiment, the case where the latch 22 is used as the locking means has been exemplified, but it is needless to say that the present invention is not limited to this.

Further, according to the rotation adjusting mechanism for a vehicle seat according to the present invention, between the lower base 11 and the floor of the cabin, or between the upper base 13 and the seat body, constituting the rotation adjusting mechanism 10 described above. A slide mechanism that can adjust the seat in the front-rear direction may be interposed therebetween.

[0023]

As described above, according to the rotation adjusting mechanism for a vehicle seat according to the first aspect of the present invention, the position where the peripheral edge of the circular opening of the lower base and the peripheral edge of the circular opening of the upper base face each other. The first rolling member is inserted into the groove formed respectively in the groove, and the first rolling member is inserted into the groove and the slope formed respectively at the opposing positions of the periphery of the circular opening of the upper base and the periphery of the circular opening of the holder member. A second rolling member is inserted, and the groove of the upper base for inserting and holding the second rolling member is a position where the groove of the upper base is continuous from the lower end of the vertical portion forming the step of the upper base to the inner peripheral edge. Since the inclined portion of the holder member holding the second rolling member is formed continuously with the lower end of the outer peripheral edge portion formed of the vertical portion of the holder member, the upper base is vertically and Left and right The upper base can be smoothly rotated without the possibility of rattling, and the outer peripheral edge composed of the vertical portion forming the step portion of the upper base and the vertical portion of the holder member improves the rigidity in the vertical direction. Can be done.

According to the present invention, the rotation adjusting mechanism including the lower base, the upper base, and the holder member can be simply configured with a minimum number of necessary parts, and the upper base can be rattled in the front-back, up-down, and rotation directions. Can be stably held, the rotational operation force can be reduced, the rigidity in the vertical direction can be improved, and a cost-effective inexpensive vehicle seat rotation adjustment mechanism can be obtained. .

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a rotation adjustment mechanism for a vehicle seat according to the present invention.

FIG. 2 is a schematic cross-sectional view of an upper base of the rotation adjusting mechanism for a vehicle seat according to the present invention.

FIG. 3 is a schematic sectional view of a holder member of the vehicle seat rotation adjusting mechanism according to the present invention.

FIG. 4 is a schematic exploded perspective view of a vehicle seat rotation adjusting mechanism according to the present invention.

FIG. 5 is a schematic sectional view of a conventional rotation adjusting mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle seat 10 Rotation adjustment mechanism 11 Lower base 11a Inner peripheral edge 11b Step 11c Groove 12 Circular opening 13 Upper base 13a Inner peripheral edge 13b Vertical part forming step 13c Groove 14 Circular opening 15 Holder member 15a Inner peripheral 15b Outer edge 15c Inclined part 16 Circular opening 18 Fixing means 21 Latch bracket 22 Latch (locking means) 25 First rolling member 27 Second rolling member

Continuation of the front page (72) Inventor Masami Yonekura 771 Kozono, Ayase-shi, Kanagawa Ikeda Bussan Co., Ltd. (56) References JP-A-6-87364 (JP, A) JP-A-8-111600 (JP, A) Japanese Utility Model Hei 4-136934 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60N 2/00-2/72 A47C 3/18

Claims (1)

(57) [Claims] 1. A lower base having a circular opening fixed to the floor side of a vehicle cabin, and a peripheral edge of a circular opening formed along the peripheral edge of the circular opening of the lower base is slidably rotatable. The upper base to which the sheet body is fixed and stacked in a suitable state, and the peripheral edge of the circular opening of the upper base is slidably held between the peripheral edge of the circular opening on the lower base side. In a rotation adjusting mechanism for a vehicle seat having a holder member having a peripheral edge of a circular opening, the peripheral edge of the circular opening of the lower base and the peripheral edge of the circular opening of the upper base are respectively formed at opposing positions. A first rolling member is inserted into the groove portion, and a second rolling portion is formed in the groove portion and the inclined portion formed at positions opposite to the peripheral portion of the circular opening of the upper base and the peripheral portion of the circular opening of the holder member. A material is inserted, and a groove portion of the upper base for inserting and holding the second rolling member is formed at a corner portion which is a position continuous from a lower end of a vertical portion forming a step portion of the upper base to an inner peripheral edge portion. A rotation adjusting mechanism for a vehicle seat, wherein an inclined portion of a holder member holding the second rolling member is formed continuously with a lower end of an outer peripheral edge portion formed by a vertical portion of the holder member. .