JP3452048B2 - Vehicle seat - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a guide member, and a slide member slidable along the guide member.
The present invention relates to a vehicle seat including a rotating mechanism that is installed on the slide member and rotates a seat body, for example, a vehicle seat that allows an occupant such as an elderly person or a physically handicapped person to easily get in and out of a vehicle.

[0002]

2. Description of the Related Art A general vehicle seat of this type has a slide mechanism 51 as shown in FIGS. The slide mechanism 51 includes a pair of left and right guide members 51k.
And a slide rail 51s and a plurality of rolling balls 51b fitted between the slide rails 51s and 51k, 51s. The slide rails 51s, 51s have a flat slide base 52.
Is mounted, and a rotation mechanism 54 for rotating the seat body H is mounted on the slide base 52. The rotating mechanism 54 is composed of an inner ring 54e and an outer ring 54f, and the inner ring 54e is fixed to the slide base 52,
The outer ring 54f is fixed to a rotary table 57 that supports the seat body H. A gear 54w is formed on the outer peripheral surface of the outer ring 54f, and the gear 54w meshes with a rack 56 attached to the guide member 51k.

With the above structure, when the seat body H is slid forward, the outer ring 54f, the turntable 57 and the seat body H are engaged by the meshing action of the rack 56 and the gear 54w.
Rotates to the left (door side), and when the seat body H reaches the forward end, the seat body H faces the door side. This makes it easier for an occupant to get in and out of the vehicle. When the seat body H is slid rearward from this position, the rack 56 and the gear 54w similarly rotate the seat body H and the like to the right to return them to their original positions.

[0004]

However, the vehicle seat 50 described above has the rotation mechanism 54 on the slide mechanism 51.
Is installed, and the seat body H is placed on it (see FIG. 3), so that the seating position of the seat body H becomes high. The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle seat in which the seating position of the seat body can be lowered.

[0005]

The above-mentioned problems can be solved by the inventions of the respective claims. The invention of claim 1 is a vehicle seat including a guide member, a slide member slidable along the guide member, and a rotation mechanism installed on the slide member to rotate a seat body, The slide member has a supported portion slidably supported by the guide member and a main body portion on which the rotating mechanism is installed, and the main body portion is arranged at a position lower than the supported portion. It is characterized by being

According to the present invention, the main body of the slide member on which the rotating mechanism is installed is formed at a position lower than the supported portion supported by the guide member. That is, as in the past,
It is not a structure in which the rotation mechanism is installed on the guide member (slide mechanism). Therefore, the rotating mechanism can be arranged at a lower position than the conventional one, and the seating position of the seat body supported by the rotating mechanism can be lowered by the lowering of the position of the rotating mechanism.

If the guide member is formed by the base portion and the pressing portion and the supported portion of the slide member is sandwiched between the base portion and the pressing portion from above and below, the guide member is formed. The slide member and the slide member can be assembled. This facilitates the assembly of the guide member and the slide member with respect to the vehicle. Further, since the guide member has a structure in which the supported portion of the slide member is sandwiched between the base portion and the pressing portion from above and below, the entire slide member can be held at a position lower than the pressing portion of the guide member.

If the supported portion of the slide member and the main body can be integrally formed by a plate-like member as in claim 3, for example, press molding of the slide member can be performed, and the cost can be reduced. be able to. In addition, claim 4
As described above, an interlocking mechanism that operates the rotating mechanism in association with the sliding operation of the slide member may be provided.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) Hereinafter, FIG. 1 and FIG.
The vehicle seat according to the first embodiment of the present invention will be described based on FIG. In this embodiment, a case where the passenger seat is the vehicle seat according to the present invention will be described. FIG. 1 is an exploded perspective view of a vehicle seat according to this embodiment, and FIG.
FIG. 11 is a sectional view taken along line II-II of FIG. In addition, the width direction of the passenger compartment is X
In the following description, the direction, the front-back direction, and the height direction are the Y and Z directions, respectively.

As shown in FIG. 1, a vehicle seat 1 includes a seat body H (the seat cushion portion is shown in the figure).
And a rotation mechanism 20 for rotating the seat body H, and a slide mechanism 10 for slidably supporting the seat body H and the rotation mechanism 20 in the front-rear direction of the vehicle.
The slide mechanism 10 is disposed in the front-rear direction (Y direction) of the passenger compartment, and includes a slide base 12 that supports the rotating mechanism 20 and the like, and edges 12f on both sides in the width direction (both sides in the X direction) of the slide base 12. A pair of left and right guide members 1 to support
0e and 10e are provided.

The guide member 10e, as shown in FIG.
A strip-shaped base plate 14 that supports the edge 12f of the slide base 12 from below, and the edge 12f of the slide base 12.
It is formed in a substantially U-shaped cross section by the same band-shaped pressing plate 15 that presses from above. The cross section of the base plate 14 is substantially L
A lower recess 14m for accommodating the lower side of the plurality of lower rolling balls 11a is formed in the sliding direction (Y direction) near the front end of the surface of the base plate 14. Further, on the lower surface of the edge 12f of the slide base 12, an upper recess 12d for accommodating the upper side of the lower rolling ball 11a is formed at a position facing the lower recess 14m of the base plate 14. That is, the edge 12f of the slide base 12
Are supported from below by the base plate 14 via their lower rolling balls 11a.

As shown in FIG. 1, the holding plate 15 of the guide member 10e is formed by a fixed plate portion 15s, a vertical plate portion 15w, and a horizontal plate portion 15y in a substantially stepped cross section. The fixing plate portion 15s is fixed to the surface of the base plate 14 with, for example, bolts. As a result, the guide member 10e is formed into a substantially U-shaped cross section as described above.

As shown in FIG. 2, an upper concave portion 15m for accommodating the upper side of the plurality of upper rolling balls 11b is formed on the lower surface of the lateral plate portion 15y of the pressing plate 15 in the sliding direction (Y direction). . Further, on the upper surface of the end edge 12f of the slide base 12, a lower recess 1 for accommodating the lower side of the upper rolling balls 11b at a position facing the upper recess 15m of the pressing plate 15 is provided.
2u is formed. That is, the edge 12f of the slide base 12 is pressed from above by the pressing plate 15 via the upper rolling balls 11b. In addition, the guide member 10
A rack 16 that meshes with a gear 24w of an outer ring 24f, which will be described later, is formed on the lateral plate portion 15y of the holding plate 15 that constitutes one side of e (the right side in FIG. 1) at the tip portion of the lateral plate portion 15y. In this way, since the rack 16 is formed on a part of the guide member 10e, the number of parts is reduced as compared with the case where the rack 56 and the guide member 51k are separate bodies as in the conventional case.

Lower recess 14 for accommodating lower rolling ball 11a
m, the upper concave portion 12d, the lower concave portion 12u for accommodating the upper rolling ball 11b, and the upper concave portion 15m are formed with their positions displaced in the width direction of the guide member 10e, as shown in FIG. . Therefore, the upper rolling ball 11b and the lower rolling ball 11a do not vertically overlap with each other, and the height dimension from the lower end of the lower rolling ball 11a to the upper end of the upper rolling ball 11b becomes small and the guide member 10e Will be more compact.

As described above, since the end edge 12f of the slide base 12 is fitted between the base plate 14 and the pressing plate 15 of the guide member 10e via the lower rolling ball 11a and the upper rolling ball 11b, the slide base 12 slides. The slide resistance between the base 12 and the guide member 10e is reduced, and the slide base 12 can be slid with respect to the guide member 10e smoothly and without any rattling. That is, the slide base 12 corresponds to the slide member of the present invention, and the end edge 12f of the slide base 12 corresponds to the supported portion of the present invention. Hereinafter, the edge 12f of the slide base 12 will be referred to as a supported portion 12f. The base plate 14 of the guide member 10e corresponds to the base portion of the present invention, and the holding plate 15 corresponds to the holding portion of the present invention.

On the slide base 12, a main body plate portion 12h that supports the rotating mechanism 20 is formed substantially horizontally inside both of the supported portions 12f (end edges 12f) described above, and both main body plate portions 12h and both sides are supported. A stepped portion 12x is formed between the supported portion 12f and the main body plate portion 12h at a position lower than the supported portion 12f by a certain dimension (see FIGS. 1 and 2). The both supported portions 12f, the step portion 12x, and the main body plate portion 12h of the slide base 12 are integrally formed by pressing a plate member, for example.

The rotating mechanism 20 includes an inner ring 24 capable of relative rotation.
e and an outer ring 24f, a large number of rolling balls 24b are sandwiched between a V groove formed in the outer circumferential direction of the inner ring 24e and a V groove formed in the inner circumferential direction of the outer ring 24f. ing. As a result, the outer ring 24f can be smoothly rotated with respect to the inner ring 24e without rattling.

The inner ring 24e of the rotating mechanism 20 is fixed to the body plate 12h of the slide base 12, and the outer ring 2
The rotary table 26 is fixed on the 4f by, for example, bolts. The seat body H is placed on the turntable 26. The height dimension of the stepped portion 12x of the slide base 12 is set to a height at which the rotation mechanism 20 mounted on the main body plate portion 12h is substantially aligned with the guide member 10e. Therefore, the level of the rotating mechanism 20 can be lowered as compared with the conventional case. Further, the body plate portion 12h of the slide base 12 has a hollow portion 24s of the inner ring 24e of the rotating mechanism 20.
An opening 12k is formed in a portion corresponding to. As a result, the weight of the slide base 12 can be reduced.

A gear 24w is formed on the outer periphery of the outer ring 24f of the rotating mechanism 20, and the gear 24w meshes with the rack 16 formed on the holding plate 15 of the one guide member 10e. As a result, the sliding operation of the slide base 12 and the rotating operation of the rotating mechanism 20 are linked. Here, the tooth dimensions of the gear 24w and the rack 16 are set so that the rotary table 26 can rotate about 90 ° to the left when the slide base 12 slides from the rear end position to the front end position. That is, the gear 24w and the rack 1
6 corresponds to the interlocking mechanism of the present invention.

Next, the operation of the vehicle seat 1 having the above structure will be described. As shown in FIG. 1, in order to get in and out a seated person from a state where the seat body H is located in the front of the vehicle, the seat body H, the rotation mechanism 20, and the slide base 12 are moved along the guide members 10e, 10e. Move forward (Y direction). As a result, the outer ring 24f of the rotating mechanism 20 rotates counterclockwise by the action of the gear 24w and the rack 16, and the rotary table 26 fixed to the outer ring 24f and the seat body H mounted on the rotary table 26 rotate left.
Then, the slide base 12 guides the guide members 10e, 10
When the forward end position of e is reached, the turntable 26 and the seat body H rotate about 90 ° to the left and stop the rotation, and the seat body H faces the door side (not shown). In this way, since the seat body H moves to the position facing the door side, the seated person can easily get in and out of the vehicle.

When the seat body H is returned to its original position,
The seat body H, the rotation mechanism 20, and the slide base 12
Is moved rearward along the guide members 10e, 10e. As a result, the outer ring 24f of the rotating mechanism 20 is moved to the gear 2
The rotating table 26 that is rotated right by the action of the 4w & rack 16 and is fixed to the outer ring 24f and the rotating table 26
The seat main body H placed on is rotated clockwise. Then, when the slide base 12 reaches the rearmost position of the guide members 10e, 10e, the rotary table 26 and the seat body H rotate about 90 ° to the right, and the seat body H is returned to the vehicle front facing position (home position). Be done.

According to the vehicle seat 1 having the above structure,
The main body plate portion 12h of the slide base 12 that supports the rotation mechanism 20 includes the rotation mechanism 20 and the guide members 10e and 10h.
Slide base 1 so that e can be aligned side by side
It is formed at a position lower than the second supported portion 12f. That is, as in the conventional case, the rotation mechanism 5 is mounted on the slide mechanism 51.
Since the structure in which 4 is installed is not provided, the rotation mechanism 20 can be arranged at a low position. Therefore, the seating position of the seat body H supported by the rotating mechanism 20 can be lowered as compared with the conventional case by the amount of the lowering of the rotating mechanism 20.

The supported portion 12 of the slide base 12
Since f is a structure fitted between the base plate 14 and the pressing plate 15 of the guide member 10e via the lower rolling ball 11a and the upper rolling ball 11b, the slide mechanism 10, that is, the slide base 12 and the guide member 10e. It becomes possible to assemble and the like. Therefore, the slide mechanism 10
It is not necessary to adjust the assembly when installing the slide mechanism in the vehicle compartment, and the installation time of the slide mechanism 10 can be shortened.

On the other hand, the conventional slide mechanism 51
Includes slide rails 51s, 51s fixed to the lower surface of the slide base 52, and individual guide members 51k, 51k.
It is difficult to assemble the guide member 51k and the slide rail 51s in advance because the rolling ball 51b is fitted in the joint between the guide member 51k and the slide rail 51s by sandwiching the rolling ball 51b. . That is,
It is difficult to assemble the slide mechanism 51, and there is a problem that it takes time to adjust the assembly when the slide mechanism 51 is installed in the vehicle compartment. As described above, the vehicular seat 1 according to the present embodiment solves such conventional problems.

Further, the guide members 10e, 10e are formed in a substantially U-shaped cross section by the base plate 14 and the pressing plate 15.
The supported portion 12f of the slide base 12 is attached to the base plate 1
4 and the pressing plate 15 sandwich the upper and lower sides, so that the entire slide base 12 can be held at a position lower than the pressing plate 15 of the guide members 10e, 10e. Further, since the supported portion 12f of the slide base 12 and the main body plate portion 12h can be integrally formed by pressing a plate-shaped member, the cost of the slide mechanism 10 having the slide base 12 can be reduced. The guide members 10e, 1
Since the base plate 14 and the pressing plate 15 which form 0e can also be press-formed, the cost of the slide mechanism 10 can be further reduced.

In this embodiment, the guide member 10e is used.
The vehicle seat 1 including the interlocking mechanism that interlocks the sliding operation of the slide base 12 and the rotating operation of the seat body H between the rotating mechanism 20 and the rotating mechanism 20 has been described as an example, but the vehicle does not include the interlocking mechanism. Sheet may be used. Also, an example is shown in which the base plate 14 having an L-shaped cross section and the pressing plate 15 having a stepped cross section are combined to form the guide member 10e having a U-shaped cross section. For example, by bending a plate-shaped member, the base plate and the pressing plate are pressed. It is also possible to integrally form a guide member having a U-shaped cross section that includes a plate.

[0027]

According to the present invention, since the rotating mechanism can be arranged at a lower position than the conventional one, the seating position of the seat body supported by the rotating mechanism can be lowered by the lowering level of the rotating mechanism.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a vehicle seat according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is an exploded perspective view of a conventional vehicle seat.

4 is a sectional view taken along the line IV-IV in FIG.

[Explanation of symbols]

H seat body 10 Slide mechanism 10e guide member 12 Slide base (slide member) 14 Base plate (base part) 15 Presser plate (presser part) 16 racks (interlocking mechanism) 20 rotation mechanism 24e inner ring 24f outer ring 24w gear (interlocking mechanism) 26 turntable

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Laid-Open No. 10-329591 (JP, A) Actual Open 1-130833 (JP, U) Actual Open 61-12838 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) B60N 2/00-2/54

Claims (4)

(57) [Claims] 1. A vehicle seat comprising a guide member, a slide member slidable along the guide member, and a rotation mechanism installed on the slide member for rotating a seat body, the slide member comprising: Has a supported portion slidably supported by the guide member and a main body portion on which the rotation mechanism is installed, and the main body portion is arranged at a position lower than the supported portion. A vehicle seat characterized by. 2. The vehicle seat according to claim 1, wherein the guide member includes a base portion that supports a supported portion of the slide member from below, and a holding portion that presses the supported portion of the slide member from above. A vehicle seat characterized by being formed. 3. The vehicle seat according to claim 1 or 2, wherein the supported portion of the slide member and the main body portion are integrally formed by a plate-shaped member. 4. The vehicle seat according to claim 1, further comprising an interlocking mechanism that operates a rotating mechanism in association with a sliding operation of the slide member. Vehicle seats.