CN111823965B

CN111823965B - Sliding device

Info

Publication number: CN111823965B
Application number: CN202010289098.2A
Authority: CN
Inventors: 樋口忠佑
Original assignee: Toyota Boshoku Corp
Current assignee: Toyota Boshoku Corp
Priority date: 2019-04-23
Filing date: 2020-04-14
Publication date: 2023-02-21
Anticipated expiration: 2040-04-14
Also published as: CN111823965A; JP2020179688A; JP7211248B2

Abstract

The present disclosure relates to a slide device capable of slidably supporting a seat body of a vehicle seat, and capable of suppressing occurrence of an improper engagement state. The sliding device is provided with: a fixed rail which can be fixed to a vehicle and in which a plurality of engaged portions are provided in series along a longitudinal direction; a movable rail to which the seat body is fixable, the movable rail being slidable with respect to the fixed rail; a drive unit that slides the movable rail relative to the fixed rail and that has a rotating body having at least one protruding portion on an outer peripheral surface thereof, the at least one protruding portion being freely engaged with any one of the engaged portions; and a housing that rotatably supports the rotating body and has a locking portion that locks a part of the fixed rail. The locking portion is displaceable relative to the fixed rail integrally with the movable rail, and can restrict the rotating body from coming off from the engaged portion.

Description

Sliding device

Technical Field

The present disclosure relates to a slide device that can support a vehicle seat so as to be slidable.

Background

For example, a sliding device described in japanese patent application laid-open No. 2015-116833 has a rack fixed to an outer surface of a fixed rail and a spur gear-shaped pinion that displaces integrally with a movable rail.

Disclosure of Invention

In the sliding device described in the above publication, when a large torque is input to the pinion, the pinion receives a force to disengage the pinion from the rack due to a reaction force from the rack. That is, in this sliding device, when a large torque is input to the pinion, the meshing engagement state between the pinion and the rack may be an inappropriate state.

One aspect of the present disclosure preferably provides a sliding device capable of suppressing generation of an improper engagement state.

One aspect of the present disclosure is a slide device that can support a seat main body of a vehicle seat to be slidable. The sliding device is provided with: a fixed rail that can be fixed to a vehicle and on which a plurality of engaged portions are provided in series in a longitudinal direction; a movable rail to which the seat body is fixable and which is slidable with respect to the fixed rail; a drive unit that slides the movable rail relative to the fixed rail, and that includes a 1 st rotating body and a 2 nd rotating body, each of the 1 st rotating body and the 2 nd rotating body having at least one protruding portion on an outer peripheral surface thereof, the at least one protruding portion being configured to be freely engaged with any one of the engaged portions; and a housing that rotatably supports the 1 st rotating body and the 2 nd rotating body and has a locking portion that locks a part of the fixed rail. The locking portion is displaceable integrally with the movable rail relative to the fixed rail, and prevents the 1 st rotating body and the 2 nd rotating body from coming off from the engaged portion. The housing has a 1 st portion and a 2 nd portion, the 1 st portion and the 2 nd portion are fastened and fixed by bolts so as to sandwich the 1 st rotating body and the 2 nd rotating body, and the housing holds the 1 st rotating body and the 2 nd rotating body in a state where a phase of the 2 nd rotating body is shifted from a phase of the 1 st rotating body.

This can restrict the rotating body from coming off the engaged portion, and can suppress an improper engagement state between the protrusion and the engaged portion.

The sliding device may have the following structure, for example.

The locking portion may be locked to a portion of the fixed rail where the plurality of engaged portions are provided. This can reliably prevent the engagement state of the projection and the engaged portion from becoming an inappropriate state.

The locking portion may have a wall portion that is located on the opposite side of the rotation center axis of the rotating body with the locked portion of the fixed rail on which the plurality of locked portions are provided interposed, and the wall portion may be able to contact the locked portion from the opposite side. At least a portion of the at least one protrusion projected onto the wall portion may overlap the wall portion at least in a direction parallel to the rotational center axis. This can further reliably prevent the engagement state between the projection and the engaged portion from becoming an inappropriate state.

The rotation center axis may be parallel to the vertical direction. The upper end of the wall portion may be located at the same height as the upper end of the protrusion portion, or at a higher height than the upper end of the protrusion portion. The lower end of the wall portion may be located at the same height as the lower end of the protrusion portion, or may be located at a lower position than the lower end of the protrusion portion. This can further reliably prevent the engagement state between the projection and the engaged portion from becoming an inappropriate state.

Drawings

Fig. 1 is a view showing a sliding apparatus according to embodiment 1.

Fig. 2 is a view showing a fixed rail according to embodiment 1.

Fig. 3 is a diagram showing the drive unit of embodiment 1.

Fig. 4 is an exploded view of the gear device of embodiment 1.

Fig. 5 is a diagram showing the gear device of embodiment 1.

Fig. 6 is a diagram showing the gear device of embodiment 1.

Fig. 7 is a diagram showing the gear device of embodiment 1.

Fig. 8A to 8E are explanatory views of the operation of the gear device according to embodiment 1.

Fig. 9A to 9E are explanatory views of the operation of the gear device according to embodiment 1.

Fig. 10 is a diagram showing the locking portion of embodiment 1.

Fig. 11 is a view showing the locking portion of embodiment 1.

Fig. 12 is a view showing the locking portion of embodiment 1.

Fig. 13 is a diagram showing a drive unit of embodiment 2.

Detailed Description

Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings.

The following embodiments illustrate examples of embodiments within the technical scope of the present disclosure. That is, the technical means and the like described in the claims are not limited to the specific configurations, structures and the like shown in the following embodiments.

The present embodiment is a seat (hereinafter referred to as a vehicle seat) that can be mounted on a vehicle such as a vehicle. Arrows and diagonal lines indicating directions in the drawings are provided as symbols for facilitating understanding of the mutual relationship between the drawings and the shapes of the components and parts.

Therefore, arrows or the like (directions) shown in the drawings do not limit the scope of the present disclosure. The directions shown in the drawings are directions in a state where the vehicle seat of the present embodiment is assembled in a vehicle. The diagonal lines do not necessarily indicate a cross-sectional view.

At least one of the components or portions to be described with reference to at least one symbol is provided, unless it is stated that the component or portion is "one". That is, in the case where it is not stated in advance as "one" or the like, the component may be provided with two or more. The vehicle seat shown in the present disclosure includes at least the components or parts described with reference numerals.

(embodiment 1)

1. Outline of sliding device

The slide device is a device for slidably supporting a seat body of a vehicle seat. The seat main body is supported slidably by two slide devices. Specifically, the 1 st slide device supports one end side of the seat main body in the seat width direction. The 2 nd slide device supports the other end side of the seat main body in the seat width direction.

The seat main body has at least a seat cushion. The seat cushion is a portion for supporting the buttocks of the seated person. That is, the vehicle seat according to the present embodiment includes two slide devices and a seat body.

2. Structure of sliding device

2.1 general description of the sliding device

The two sliding devices are of a substantially bilaterally symmetrical structure. The following description is of the slide device 10 disposed on the left end side in the seat width direction. As shown in fig. 1, the slide device 10 includes at least a fixed rail 11, a movable rail 12, and a drive unit 14.

The fixed rail 11 is a member directly or indirectly fixed to the vehicle. The seat main body is fixed to the movable rail 12, and the movable rail 12 is a member that can slide with respect to the fixed rail 11.

As shown in fig. 2, the fixed rail 11 is provided with a plurality of holes 11A. The plurality of holes 11A are arranged in series along the length direction of the fixed rail 11. The plurality of holes 11A are holes used when sliding the movable rail 12.

Each hole 11A is provided in a belt-shaped portion 11C (hereinafter referred to as an engaged portion 11C) of the fixed rail 11, which portion is substantially perpendicular to the seat width direction. A band-shaped portion 11D is provided at a position of the fixed rail 11 facing the locked portion 11C with a gap therebetween.

A part of the movable rail 12 penetrates the gap and is fitted into the fixed rail 11 (see fig. 1). A plurality of rollers (not shown) are provided at a position of the movable rail 12 located inside the fixed rail 11. These rollers support the movable rail 12 so as to be displaceable.

2.2 drive Unit

< brief summary of drive Unit >

The drive unit 14 is a drive device for sliding the movable rail 12 with respect to the fixed rail 11. Specifically, as shown in fig. 3, the drive unit 14 includes at least a drive unit 15 and a gear device 16.

The driving unit 15 includes an actuator 15A and a speed reduction mechanism 15B. The actuator 15A is constituted by an electric motor or the like that generates a rotational force. The speed reduction mechanism 15B increases the rotational force generated at the actuator 15A and transmits the increased rotational force to the gear device 16.

The driving unit 14, which is the gear device 16, and the driving unit 15 are fixed to the movable rail 12. That is, the driving unit 15, the gear device 16, and the movable rail 12 are integrally displaced with respect to the fixed rail 11.

< Structure of Gear device >

The gear device 16 is a device for sliding the movable rail 12 by the rotational force output from the driving portion 15. As shown in fig. 4 and 5, the gear device 16 includes at least a 1 st rotating body 17, a 2 nd rotating body 18, a 3 rd rotating body 19, and a gear unit 21.

< 1 st rotating body, 2 nd rotating body, and 3 rd rotating body >

The 1 st rotating body 17, the 2 nd rotating body 18, and the 3 rd rotating body 19 are supported to be rotatable with respect to the 1 st casing 20A and the 2 nd casing 20B in a state of being sandwiched between the 1 st casing 20A and the 2 nd casing 20B (see fig. 3).

The 1 st case 20A and the 2 nd case 20B are fastened and fixed to each other by two bolts (not shown). The 1 st rotating body 17, the 2 nd rotating body 18, and the 3 rd rotating body 19 are arranged in series along the longitudinal direction of the fixed rail 11 (the seat front-rear direction in the present embodiment) (see fig. 6).

The 2 nd rotating body 18 is disposed at a position shifted from the 1 st rotating body 17 in the longitudinal direction (the seat front side in the present embodiment). The 3 rd rotating body 19 is disposed at a position shifted from the 1 st rotating body 17 in the longitudinal direction and located on the opposite side (seat rear side in the present embodiment) to the 2 nd rotating body 18.

As shown in fig. 6, at least one (three in the present embodiment) 1 st projection 17A is provided on the outer peripheral surface of the 1 st rotating body 17. These 1 st projecting portions 17A are portions to be fitted into any one of the plurality of holes 11A in a detachable manner.

At least one (three in the present embodiment) 2 nd projecting portion 18A is provided on the outer peripheral surface of the 2 nd rotating body 18. Like the 1 st projection 17A, the 2 nd projection 18A is also a portion that is detachably fitted into any one of the plurality of holes 11A.

At least one (three in the present embodiment) 3 rd protruding portion 19A is provided on the outer peripheral surface of the 3 rd rotating body 19. Like the 1 st projection 17A, these 3 rd projections 19A are also detachably fitted into any one of the plurality of holes 11A.

The 1 st rotating body 17, the 2 nd rotating body 18, and the 3 rd rotating body 19 are congruent in shape. The 1 st, 2 nd, and 3

rd rotating bodies

17, 18, and 19 are held by the 1 st and 2

nd cases

20A and 20B in a state in which the respective phases are shifted from those of the adjacent rotating bodies.

That is, the 2 nd rotating body 18 is supported by the 1 st casing 20A and the 2 nd casing 20B in a state delayed by a predetermined phase from the 1 st rotating body 17. The 3 rd rotating body 19 is supported by the 1 st casing 20A and the 2 nd casing 20B in a state advanced by a predetermined phase with respect to the 1 st rotating body 17.

Thus, the 2 nd projection 18A is detachably fitted into any one of the plurality of holes 11A at a timing different from the 1 st projection 17A. Similarly, the 3 rd projecting portion 19A is detachably fitted into any one of the plurality of holes 11A at a timing shifted from the 1 st projecting portion 17A and the 2 nd projecting portion 18A.

The advanced state is, for example, a state in which one of the 1 st rotating body 17, the 2 nd rotating body 18, and the 3 rd rotating body 19 rotates clockwise with respect to the remaining two rotating bodies when viewed from above in the state shown in fig. 6. The retarded state is, for example, a state in which one of the 1 st rotating body 17, the 2 nd rotating body 18, and the 3 rd rotating body 19 rotates counterclockwise with respect to the remaining two rotating bodies when viewed from above in the state shown in fig. 6. The above-described timing is, for example, a phase difference corresponding to the size between the adjacent holes 11A.

< Gear Unit, etc. >

As shown in fig. 5, the gear unit 21 is a gear mechanism for synchronously rotating the 1 st rotating body 17, the 2 nd rotating body 18, and the 3 rd rotating body 19. The gear unit 21 has at least a 1 st drive gear 21A and a 2 nd drive gear 21B.

The 1 st drive gear 21A is a gear that meshes with the 1 st gear 17B. The 2 nd drive gear 21B is a gear that meshes with the 2 nd gear 18B and the 3 rd gear 19B. The 1 st drive gear 21A and the 2 nd drive gear 21B are disposed on the same rotation axis and rotate integrally.

The 1 st drive gear 21A and the 2 nd drive gear 21B of the present embodiment are integrally molded products made of resin or metal. The 2 nd drive gear 21B is a gear having a pitch circle diameter larger than that of the 1 st drive gear 21A.

The 1 st gear 17B constitutes a part of the drive unit 14, and is a gear that is disposed on the same rotation axis as the 1 st rotating body 17 and rotates integrally with the 1 st rotating body 17. The 1 st gear 17B is integrated with the 1 st rotating body 17 via a fitting portion such as a serration or a spline.

The 2 nd gear 18B constitutes a part of the drive unit 14, and is a gear that is disposed on the same rotation axis as the 2 nd rotating body 18 and rotates integrally with the 2 nd rotating body 18. The 2 nd gear 18B is integrated with the 2 nd rotating body 18 via a fitting portion such as a serration or a spline.

The 3 rd gear 19B constitutes a part of the drive unit 14, and is a gear that is disposed on the same rotation axis as the 3 rd rotating body 19 and rotates integrally with the 3 rd rotating body 19. The 3 rd gear 19B is integrated with the 3 rd rotating body 19 via a fitting portion such as a serration or a spline.

The 1 st drive gear 21A, the 2 nd drive gear 21B, the 1 st gear 17B, the 2 nd gear 18B, and the 3 rd gear 19B of the present embodiment are constituted by spur gears. The rotational force output from the driving portion 15 is transmitted to the 1 st drive gear 21A or the 2 nd drive gear 21B.

Specifically, the rotational force output from the driving section 15 is transmitted to the driving pinion 15D (see fig. 5) via the driving shaft 15C (see fig. 3). The drive pinion 15D meshes with the 2 nd drive gear 21B.

That is, the rotational force output from the driving portion 15 is transmitted to the 2 nd drive gear 21B. Since the 1 st drive gear 21A and the 2 nd drive gear 21B are integrated, the 1 st drive gear 21A and the 2 nd drive gear 21B rotate at the same rotation speed.

Also, the gear ratio of the 1 st gear 17B to the 1 st drive gear 21A, the gear ratio of the 2 nd gear 18B to the 2 nd drive gear 21B, and the gear ratio of the 3 rd gear 19B to the 2 nd drive gear 21B are all the same.

As shown in fig. 7, when a virtual line passing through the rotation centers of the 1 st gear 17B, the 2 nd gear 18B, and the 3 rd gear 19B in the longitudinal direction of the fixed rail 11 is referred to as a reference line L1, and a virtual line orthogonal to the 1 st reference line L1 and passing through the rotation center of the 1 st gear 17B is referred to as a center line L2, the rotation axes Lr of the 1 st drive gear 21A and the 2 nd drive gear 21B are orthogonal to the center line L2.

As shown in fig. 4, the 1 st drive gear 21A, the 2 nd drive gear 21B, and the drive pinion gear 15D are sandwiched between the 1 st gear case 23A and the 2 nd gear case 23B and supported by the 1 st gear case 23A and the 2 nd gear case 23B. The 1 st gear housing 23A and the 2 nd gear housing 23B are assembled to each other by a fastener 23C (see fig. 3) such as a screw.

< operation of Gear device >

As shown in fig. 8A to 8E and fig. 9A to 9E, the 1 st rotating body 17, the 2 nd rotating body 18, and the 3 rd rotating body 19 rotate while maintaining a predetermined phase difference. The 1 st rotating body 17, the 2 nd rotating body 18, and the 3 rd rotating body 19 rotate in the order shown in fig. 8A → fig. 8B → fig. 8C → fig. 8D → fig. 8E → fig. 9A → fig. 9B → fig. 9C → fig. 9D → fig. 9E.

That is, the 1 st projection 17A, the 2 nd projection 18A, and the 3 rd projection 19A are sequentially fitted into any one of the plurality of holes 11A and then detached from the fitted hole 11A.

Specifically, when any one of the 1 st projection 17A, the 2 nd projection 18A, and the 3 rd projection 19A is in a state of being fitted into the hole 11A, any one of the remaining projections is in a process of being detached from the hole 11A (hereinafter referred to as a detachment process), and the other of the remaining projections is in a process of entering into the hole 11A (hereinafter referred to as an entering process).

For example, in fig. 8A, the 1 st projection 17A marked with a black dot is fitted into the hole 11A. In fig. 8A, the 2 nd projection 18A marked with a black dot is in the process of entering. In fig. 8A, the 3 rd projecting portion 19A marked with a black dot is in the detaching process.

For example, in fig. 8B, the 1 st protrusion 17A marked with a black dot is in the detaching process. In fig. 8B, the entering process of the 2 nd projecting portion 18A marked with a black dot is advanced as compared with the state shown in fig. 8A. In fig. 8B, the 3 rd projecting portion 19A marked with a black dot is separated from the state shown in fig. 8A.

In fig. 8D, the 2 nd projection 18A marked with a black dot is fitted into the hole 11A, and the 1 st projection 17A marked with a black dot and the 3 rd projection 19A marked with a black dot are in a detaching process.

Further, in fig. 9D, the 3 rd projection 19A (the 3 rd projection 19A marked with a black triangle) adjacent to the 3 rd projection 19A marked with a black dot on the backward side in the rotational direction is fitted into the hole 11A.

In fig. 9D, the 1 st projection 17A marked with a black dot and the 2 nd projection 18A marked with a black dot are in a detaching process, and the 1 st projection 17A (the 1 st projection 17A marked with a black triangle) adjacent to the 1 st projection 17A marked with a black dot on the backward side in the rotation direction is in an entering process.

< detachment restriction Structure >

As described above, the driving unit 14 causes the movable rail 12 to slide by engaging the 1 st to 3 rd projection portions 17A to 19A with any one of the plurality of holes 11A in order to fit. That is, the plurality of holes 11A of the present embodiment function as engaged portions that are freely engaged with the 1 st to 3 rd projecting portions 17A to 19A.

When a large torque is input to the 1 st to 3 rd rotating bodies 17 to 19, the 1 st to 3 rd protrusions 17A to 19A receive a force to separate the 1 st to 3 rd protrusions 17A to 19A from the engaged portion 11C due to a reaction force from the engaged portion 11C.

That is, when a large torque is input to the 1 st to 3 rd rotating bodies 17 to 19, the engagement state between the 1 st to 3 rd rotating bodies 17 to 19 and the engaged portion 11C (the plurality of holes 11A) may become an inappropriate state.

In contrast, in the present embodiment, as shown in fig. 10, the locking portion 20C is locked to a part of the fixed rail 11 (the locked portion 11C in the present embodiment). As shown in fig. 11, the locking portion 20C is provided in the 1 st case 20A.

Specifically, locking portion 20C has wall portion 20D, and wall portion 20D is located on the opposite side of rotation central axis Lo of 1 st to 3 rd rotating bodies 17 to 19 with respect to locked portion 11C interposed therebetween and is contactable with locked portion 11C from the opposite side.

Locking portion 20C including wall portion 20D is integrated with first case 20A. Therefore, locking portion 20C can be displaced integrally with movable rail 12 with respect to fixed rail 11, and regulates first to third rotating bodies 17 to 19, that is, 1 st to 3 rd protruding portions 17A to 19A from coming off from engaged portion 11A.

In the present embodiment, the 1 st case 20A and the locking portion 20C including the wall portion 20D are integrally molded from resin or metal. At least a part of the 1 st projection 17A to the 3 rd projection 19A projected on the wall portion 20D overlaps with the wall portion 20D at least in a direction parallel to the rotation center axis Lo (in the present embodiment, in the vertical direction).

That is, as shown in fig. 12, when the wall portion 20D and the 1 st to 3 rd protruding portions 17A to 19A are viewed from the direction substantially orthogonal to the outer surface of the wall portion 20D by the viewer, at least a part of the 1 st to 3 rd protruding portions 17A to 19A is located in the wall portion 20D.

Specifically, in the present embodiment, the upper end of the wall portion 20D is located at the same height as the upper ends of the 1 st to 3 rd projection portions 17A to 19A, or at a position higher than the upper ends of the 1 st to 3 rd projection portions 17A to 19A. The lower end of the wall portion 20D is located at the same height as the lower ends of the 1 st to 3 rd protrusions 17A to 19A or lower than the lower ends of the 1 st to 3 rd protrusions 17A to 19A.

In fig. 11, the upper end of the wall portion 20D is at the same height as the upper ends of the 1 st to 3 rd protrusions 17A to 19A, and the lower end of the wall portion 20D is located lower than the lower ends of the 1 st to 3 rd protrusions 17A to 19A.

3. Characteristics of the sliding device of the present embodiment

The first case 20A is provided with a locking portion 20C that locks a part of the fixed rail 11. This locking portion 20C is displaceable relative to fixed rail 11 integrally with movable rail 12, and regulates detachment of 1 st to 3 rd rotating bodies 17 to 19 (1 st to 3 rd protruding portions 17A to 19A) from hole 11A.

This can restrict the 1 st to 3 rd rotating bodies 17 to 19 from coming out of the plurality of holes 11A, and therefore, it is possible to suppress the engagement state of the 1 st to 3 rd protrusions 17A to 19A with the plurality of holes 11A from becoming an inappropriate state.

The locking portion 20C is locked to a portion of the fixed rail 11 where the plurality of holes 11A are provided, that is, the locked portion 11C. This can reliably prevent the 1 st to 3 rd protrusions 17A to 19A and the plurality of holes 11A from being in an inappropriate state in the engaged state.

At least a part of the 1 st projection 17A to the 3 rd projection 19A projected on the wall portion 20D overlaps the wall portion 20D in a direction parallel to the rotation center axis Lo (see fig. 12). This can more reliably prevent the 1 st to 3 rd protrusions 17A to 19A from being improperly engaged with the plurality of holes 11A.

The upper end of the wall portion 20D is at the same height as the upper ends of the 1 st to 3 rd projecting portions 17A to 19A, and the lower end of the wall portion 20D is located at a position lower than the lower ends of the 1 st to 3 rd projecting portions 17A to 19A (see fig. 12). This can more reliably prevent the 1 st to 3 rd protrusions 17A to 19A from becoming improperly engaged with the hole 11A.

As shown in fig. 8A to 8E and fig. 9A to 9E, in the sliding device 10 of the present embodiment, the 1 st rotating body 17, the 2 nd rotating body 18, and the 3 rd rotating body 19 rotate in synchronization, and the 1 st protruding portion 17A, the 2 nd protruding portion 18A, and the 3 rd protruding portion 19A are each detachably fitted into any one of the plurality of holes 11A at mutually shifted timings. That is, the driving unit 14 performs the same operation as the pinion gear engaged with the rack gear.

Therefore, as compared with the case where the same operation as the pinion gear that meshes with the rack is performed by only one rotating body, the diameter of each of the 1 st rotating body 17, the 2 nd rotating body 18, and the 3 rd rotating body 19 can be made smaller than the diameter of the one rotating body. Further, the slide device 10 can be prevented from being large.

In the present embodiment, a gear unit 21 is used as a transmission body for synchronously rotating the 1 st rotating body 17, the 2 nd rotating body 18, and the 3 rd rotating body 19. In the gear unit 21, the 1 st drive gear 21A and the 2 nd drive gear 21B rotate integrally, and therefore the 1 st rotating body 17, the 2 nd rotating body 18, and the 3 rd rotating body 19 can be rotated synchronously with high accuracy.

That is, the accuracy of synchronization is substantially restricted by the dimensional accuracy of the 1 st drive gear 21A, the 2 nd drive gear 21B, the 1 st gear 17B, the 2 nd gear 18B, and the 3 rd gear 19B. Therefore, when the dimensions of the 1 st drive gear 21A, the 2 nd drive gear 21B, the 1 st gear 17B, the 2 nd gear 18B, and the 3 rd gear 19B are sufficiently accurate, the 1 st rotating body 17, the 2 nd rotating body 18, and the 3 rd rotating body 19 can be rotated synchronously with high accuracy.

The 1 st drive gear 21A and the 2 nd drive gear 21B are integrally formed. This makes it possible to improve the dimensional accuracy of the gear unit 21 while suppressing an increase in the manufacturing cost of the gear unit 21 for the provider of the slide device 10.

The 1 st gear 17B and the 1 st rotating body 17 are disposed on the same axis of rotation, the 2 nd gear 18B and the 2 nd rotating body 18 are disposed on the same axis of rotation, and the 3 rd gear 19B and the 3 rd rotating body 19 are disposed on the same axis of rotation. This can suppress an increase in size of the sliding device 10.

(embodiment 2)

In the present embodiment, as shown in fig. 13, the upper end of the wall portion 20D is lower than the upper ends of the 1 st to 3 rd projecting portions 17A to 19A.

The above description is directed to points different from the sliding device 10 according to embodiment 1. The same constituent elements as those in embodiment 1 are denoted by the same reference numerals as those in embodiment 1. Therefore, redundant description is omitted in the present embodiment.

(other embodiments)

At least one of the 1 st gear 17B to the 3 rd gear 19B may be disposed at a position deviated from the rotation axis of the corresponding rotating body.

The 1 st drive gear 21A, the 2 nd drive gear 21B, the 1 st gear 17B, the 2 nd gear 18B, and the 3 rd gear 19B of the above embodiments are constituted by spur gears. This is because the drive unit 15 (the reduction mechanism 15B) includes a worm.

That is, the reduction mechanism including the worm and the worm wheel (helical gear) can realize a large reduction ratio while suppressing an increase in size. However, in a speed reduction mechanism for reducing speed by a worm or the like, loss of rotational force is large.

Therefore, in the above embodiment, loss of the rotational force is suppressed by configuring the plurality of gears constituting the gear device 16 as spur gears. However, the gear device 16 may be constituted by a gear (e.g., a helical gear) other than a spur gear.

When any one of the 1 st projection 17A, the 2 nd projection 18A, and the 3 rd projection 19A is in a state of being fitted into the hole 11A, any one of the remaining projections is not necessarily in a detaching process, and the other of the remaining projections is not necessarily in an entering process.

The slide device 10 may be configured to exclude the 3 rd rotating body 19, or may be configured to have the 4 th rotating body, for example.

The slide device 10 may be configured such that the 2 nd rotating body 18 is disposed on the seat rear side with respect to the 1 st rotating body 17, for example.

The slide device 10 may have a structure in which the outer edges of the plurality of holes 11A are covered with a cushioning material made of resin, for example, a structure in which the 1 st to 3 rd protruding portions 17A to 19A are covered with resin, or a structure in which the 1 st to 3 rd protruding portions 17A to 19A are made of resin.

The hole 11A may be, for example, a recessed blind hole having a recessed portion shape, or a hole (e.g., a slit-shaped hole) having a part of the inner periphery opened.

The slide device 10 may have a slide mechanism composed of a rack and a pinion. In this mechanism, the rack corresponds to the engaged portion 11C, and the pinion corresponds to the rotating body.

The drive unit 14 may be constituted by, for example, a toothed belt or an intermediate gear that transmits rotational force.

The driving portion 15 may be provided only in the 1 st slide device of the two slide devices, and the driving force may be supplied from the driving portion 15 of the 1 st slide device to the 2 nd slide device.

The slide device 10 can also be applied to seats used in vehicles such as railway vehicles, ships, and aircrafts, and stationary seats used in theaters, homes, and the like.

The present disclosure is not limited to the above embodiments as long as it conforms to the gist of the invention described in the above embodiments. Therefore, the present invention may be configured by combining at least two of the above-described embodiments, may be configured by omitting any one of the constituent elements shown in the above-described embodiments, or may be configured by omitting any one of the constituent elements described with reference numerals in the above-described embodiments.

Claims

1. A slide device capable of slidably supporting a seat body of a vehicle seat, the slide device comprising:

a fixed rail that can be fixed to a vehicle and on which a plurality of engaged portions are provided in series in a longitudinal direction;

a movable rail to which the seat main body is fixable and which is slidable with respect to the fixed rail;

a drive unit that slides the movable rail relative to the fixed rail, and that includes a 1 st rotating body and a 2 nd rotating body, each of the 1 st rotating body and the 2 nd rotating body having at least one protruding portion on an outer peripheral surface thereof, the at least one protruding portion being configured to be freely engaged with any one of the engaged portions; and

a housing rotatably supporting the 1 st and 2 nd rotating bodies, having a locking portion locked to a part of the fixed rail, and having a locking portion

The locking portion is displaceable relative to the fixed rail integrally with the movable rail, and is capable of restricting disengagement of the 1 st rotating body and the 2 nd rotating body from the engaged portion,

the housing has a 1 st portion and a 2 nd portion, the 1 st portion and the 2 nd portion are fastened and fixed by bolts so as to sandwich the 1 st rotating body and the 2 nd rotating body, and the housing holds the 1 st rotating body and the 2 nd rotating body in a state where a phase of the 2 nd rotating body is shifted from a phase of the 1 st rotating body.

2. Sliding device according to claim 1,

the locking portion is locked to a portion of the fixed rail where the plurality of engaged portions are provided.

3. Sliding device according to claim 2,

the locking portion has a wall portion which is located on an opposite side to a rotation center axis of the rotating body with an engaged portion of the fixed rail on which the plurality of engaged portions are provided interposed, and which is capable of coming into contact with the engaged portion from the opposite side,

at least a part of the at least one projection projected to the wall portion overlaps the wall portion at least in a direction parallel to the rotational center axis.

4. Sliding device according to claim 3,

the central axis of rotation is parallel to the vertical direction,

the upper end of the wall portion is located at the same height as the upper end of the protrusion portion or at a higher position than the upper end of the protrusion portion,

the lower end of the wall portion is located at the same height as the lower end of the protrusion or at a position lower than the lower end of the protrusion.