JP3013885B2 - 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. Have
A ring-shaped retainer in which a plurality of rolling member holes are formed at positions facing the peripheral edge of the circular opening of the lower base and the upper base or at positions facing the peripheral edge of the circular opening of the upper base and the holder member. The present invention relates to an improvement of a rotation adjustment mechanism of a vehicle seat into which a vehicle is inserted.

[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 precision of the peripheral portion A1 of the circular opening of the upper base A and the stepped portion L2 of the lower base L is required, and a lubricant such as grease is manually applied. There was a disadvantage that the work was complicated and the cost increased.

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. Further, when a plurality of rolling members made of balls or the like are inserted between the lower base L and the upper base A, the rolling members are displaced during rotation, and the pitch between the plurality of rolling members is reduced. Had a risk of changing.

An object of the present invention is to provide a rotation adjusting mechanism comprising a lower base, an upper base, and a holder member without causing a risk of a change in the dimension between the pitches of the plurality of rolling members and without causing backlash. It can be easily constructed with a minimum number of parts, and can stably hold the upper base without rattling in the front, rear, up and down, and rotating directions, and can reliably lubricate rolling members such as bearings. Provide a vehicle seat rotation adjustment mechanism that can supply an appropriate amount of initial lubrication at the time of assembly, reduce rotational operation force, improve rigidity in the vertical direction, and be inexpensive. It is.

[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 edge to which the peripheral edge of the circular opening formed in accordance with the upper edge is laminated and slidably rotatable and which is fixed to the sheet body, and the upper edge of the circular edge of the circular opening of the upper base. A holder member formed with a peripheral portion of a circular opening which is slidably held between the peripheral portion of the circular opening on the lower base side and a peripheral portion of the circular opening of the lower base and the upper base. A vehicle seat rotation adjustment mechanism in which a ring-shaped retainer having a plurality of rolling member holes formed therein is inserted at an opposing position or at a position opposing the peripheral edge of the circular opening of the upper base and the holder member. , The ring-shaped retainer is formed into a hollow shape opening port formed on one side, characterized in that the lubricant is accommodated in the hollow portion.

According to a second aspect of the present invention, there is provided a rotation adjusting mechanism for a vehicle seat, wherein the hollow portion of the ring-shaped retainer is formed in a substantially C-shaped cross section.

According to a third aspect of the present invention, there is provided a rotation adjusting mechanism for a vehicle seat, wherein a projection is formed at an upper portion or a lower portion of the hollow portion of the ring-shaped retainer.

According to the rotation adjusting mechanism for a vehicle seat according to the first aspect of the present invention, the ring-shaped retainer having a plurality of rolling member holes is a hollow having an opening on one side. It has a hollow part in which the lubricating material is stored, so that an appropriate amount of the lubricating material adheres to the rolling member according to the movement of the rolling member inserted into the hole for the rolling member. The position of the plurality of rolling members can be regulated and held in the plurality of rolling member holes of the retainer, thereby preventing generation of abnormal noise and improving the assembling workability. In addition, the rigidity can be prevented from changing, and the upper base can be smoothly rotated without the possibility of rattling of the upper base in the vertical direction, the horizontal direction, and the rotation direction.

According to the rotation adjusting mechanism for a vehicle seat according to claim 2 of the present invention, the hollow portion of the ring-shaped retainer is formed in a substantially C-shaped cross section, so that it is accommodated in the hollow portion. Lubricant is supplied in appropriate amounts according to the movement of the rolling members,
The lubricant can be adhered to the rolling members for a long period of time, and the upper base can be smoothly rotated.

According to the rotation adjusting mechanism for a vehicle seat according to the third aspect of the present invention, since the projection is formed on the upper or lower portion of the hollow portion of the ring-shaped retainer, it can be used when assembling with bolts or the like. The upper or lower projection of the hollow part is pressed, the hollow part is deformed and the lubricant in the hollow part is extruded,
An appropriate amount of initial lubrication can be performed, and then the lubricant contained in the hollow portion is supplied in an appropriate amount according to the movement of the rolling member, and the lubricant can be adhered to the rolling member for a long time, The upper base can be smoothly rotated.

[0015]

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 vehicle cabin below the seat cushion 2, the whole seat 1 is rotationally adjusted about the center of the seat as a center of rotation, and 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 at the inner peripheral edge 11a of the lower base 11 on the circular opening 12 side. An inner peripheral edge portion 13a of the upper base 13 on the side of the circular opening 14 is located outside the step portion 11b.

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 lower base 1 by fixing means 18 composed of bolts and nuts.
1 is fixed to the inner peripheral edge 11a of the upper base 1
3 is slidably held between the lower base 11 and the holder member 15.

Further, 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 a locking means.
Can be restricted at a predetermined position.

The outer peripheral edge 15 of the holder member 15
An inclined portion 15c that is inclined obliquely upward is formed in b. Further, a step 13b is formed at an intermediate portion of the upper base 13 facing the outer peripheral edge 15b of the holder member 15.

A groove 11c is formed outside the step 11b of the inner peripheral edge 11a on the circular opening 12 side of the lower base 11, and the groove on the bottom side of the inner peripheral edge 13a on the circular opening 14 side of the upper base 13. A groove 13c is formed at a position facing 11c. Also the upper base 13
A groove 13d, which becomes a recess when viewed from the holder member 15 side, is formed between the lower end of the step 13b and the groove 13c.

A plurality of first rolling members 25 made of balls are inserted together with the ring-shaped first retainer 31 at positions where the groove 11c of the lower base 11 and the groove 13c of the upper base 13 face each other. Further, a plurality of second rolling members 27 made of balls are inserted together with the ring-shaped second retainer 34 between the groove 13d of the upper base 13 and the inclined portion 15c of the holder member 15 opposed to the groove. I have.

As shown in FIG. 4, the first rolling member 25
Are held by a ring-shaped first holder 31 having a plurality of ball holes 32 as rolling member holes.
In the present embodiment, the first retainer 31 has a ball hole 32 as a first rolling member hole in which six first rolling members 25 can be inserted and held. The number of the plurality of ball holes 32 is not limited to six.

The second rolling member 27 is held by a ring-shaped second holder 34 having a plurality of ball holes 35 formed therein. In the second embodiment, six second rolling members 27 can be inserted and held in the second cage 34 in this embodiment.
Although six ball holes 35 are formed as the rolling member holes, the plurality of ball holes 35 are not limited to six.

The ring-shaped first retainer 31 has a hollow hollow portion 31a having an opening 31b formed on one side. In the embodiment shown in FIG.
Are formed in a substantially U-shaped cross section. In addition, FIG.
In the embodiment shown in (b) and (c), the hollow portion 31a is formed in a substantially C-shaped cross section.

A lubricant 33 such as grease is provided in the hollow portion 31a.
Is stored. As shown in FIG. 3B, an appropriate amount of the lubricant 33 can be attached to the rolling member 25 in accordance with the movement of the rolling member 25 inserted into the ball hole 32 as the rolling member hole.

Further, protrusions 31c are formed on the upper or lower portion of the hollow portion 31a of the ring-shaped first retainer 31, in this embodiment, on both the upper and lower portions. The projections 31c press the upper and lower projections 31c of the hollow portion 31a during assembly by the fixing means 18 such as bolting, so that the hollow portion 31a is deformed and the lubricant 33 accommodated in the hollow portion 31a is extruded. In this way, an appropriate amount of initial lubrication can be performed.

The shape of the hollow portion 31a and the like of the ring-shaped first holder 31 can be similarly applied to the ring-shaped second holder 34.

It should be noted that the present invention is not limited to the above-described embodiment, and that the shapes, structures, and the like of each part of the first and second cages can be freely modified and changed as necessary. Therefore, various modifications may be considered.

According to the rotation adjusting mechanism for a vehicle seat according to the present invention, the lower base 11 and the floor of the passenger compartment, or the upper base 13 and the seat body, which constitute the rotation adjusting mechanism 10 described above, are connected. A slide mechanism that can adjust the seat in the front-rear direction may be interposed therebetween.

[0032]

As described above, according to the rotation adjusting mechanism for a vehicle seat according to the first aspect of the present invention, the ring-shaped retainer having a plurality of rolling member holes is opened to one side. It has a hollow hollow part with a mouth formed, and a lubricant is stored in this hollow part, so that an appropriate amount of lubricant is rolled according to the movement of the rolling member inserted into the rolling member hole. Can be attached to the moving member, the plurality of rolling members can be positioned and held in the plurality of rolling member holes of the retainer, noise can be prevented from occurring, and assembling workability can be prevented. , Rigidity can be prevented from changing, and the upper base can be smoothly rotated without the possibility of rattling of the upper base in the vertical direction, the horizontal direction, and the rotation direction.

According to the rotation adjusting mechanism for a vehicle seat according to claim 2 of the present invention, since the hollow portion of the ring-shaped retainer is formed in a substantially C-shaped cross section, it is accommodated in the hollow portion. Lubricant is supplied in appropriate amounts according to the movement of the rolling members,
The lubricant can be adhered to the rolling members for a long period of time, and the upper base can be smoothly rotated.

According to the rotation adjusting mechanism for a vehicle seat according to the third aspect of the present invention, since the projection is formed on the upper or lower portion of the hollow portion of the ring-shaped retainer, it can be used when assembling with bolts or the like. The upper or lower projection of the hollow part is pressed, the hollow part is deformed and the lubricant in the hollow part is extruded,
An appropriate amount of initial lubrication can be performed, and then the lubricant contained in the hollow portion is supplied in an appropriate amount according to the movement of the rolling member, and the lubricant can be adhered to the rolling member for a long time, The upper base can be smoothly rotated.

According to the present invention, the rotation adjusting mechanism including the lower base, the upper base, and the holder member is required to be capable of reducing the gap between the pitches of the plurality of rolling members without causing any backlash. It can be easily constructed with a minimum number of parts, and can stably hold the upper base without rattling in the front, rear, up and down, and rotating directions, and can reliably lubricate rolling members such as bearings. It is possible to provide an appropriate amount of initial lubrication at the time of assembly, reduce the rotational operation force, improve the rigidity in the vertical direction, and obtain a low-cost vehicle seat rotation adjustment mechanism. it can.

[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 a ring-shaped first retainer of the rotation adjusting mechanism for a vehicle seat according to the present invention.

3A and 3B show different embodiments of a ring-shaped first retainer of a rotation adjustment mechanism for a vehicle seat according to the present invention, wherein FIG. 3A is a partial perspective view, and FIG. Area view,
(C) is a transverse sectional view.

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]

 Reference Signs List 1 vehicle seat 10 rotation adjusting mechanism 11 lower base 11a inner peripheral edge 11b step 11c groove 12 circular opening 13 upper base 13a inner peripheral edge 13b step 13c groove 13d groove 14 circular opening 15 holder member 15a inner peripheral edge 15b Part 15c Inclined part 16 Circular opening 18 Fixing means 25 First rolling member 27 Second rolling member 31 First retainer 31a Hollow part 31b Open mouth 31c Projection 32 First rolling member hole 33 Lubricant 34 Second Cage 35 Second Rolling Member Hole

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-18343 (JP, U) JP-A 4-136934 (JP, U) JP-A 61-58129 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) A47C 3/18 B60N 3/14

Claims (3)

(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. A holder member having a peripheral portion of a circular opening formed therein, wherein the lower base and the upper base have opposing peripheral edges of the circular opening, or the upper base and the peripheral member have opposing peripheral portions of the circular opening of the holder member. In a vehicle seat rotation adjusting mechanism in which a ring-shaped retainer having a plurality of rolling member holes formed therein is inserted, the ring-shaped retainer is formed in a hollow shape having an opening on one side. A rotation adjusting mechanism for a vehicle seat, wherein a lubricant is stored in the hollow portion. 2. The rotation adjusting mechanism for a vehicle seat according to claim 1, wherein a hollow portion of the ring-shaped retainer is formed in a substantially C-shaped cross section. 3. The rotation adjusting mechanism for a vehicle seat according to claim 1, wherein a projection is formed at an upper portion or a lower portion of the hollow portion of the ring-shaped retainer.