JP7297695B2 - vehicle seat - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a vehicle seat mounted on a vehicle.

For example, in the vehicle seat disclosed in Patent Document 1, the rear end side of the seat body can rotate forward and upward around the front end side. The rotation function is intended to improve ease of getting on and off when the user gets on and off from the rear seat.

U.S. Patent Application Publication 2019/0225130

The vehicle seat disclosed in Patent Document 1 includes a lock mechanism that restricts the rotation of the seat body. However, with the lock mechanism, there is a possibility that the rotation restriction may be released at an unintended timing.

The present disclosure discloses an example of a vehicle seat that includes an elevating device that vertically displaces a seat body and that can cope with a case where rotation regulation is unintentionally released.

A vehicle seat mounted on a vehicle desirably has, for example, at least one of the following constituent requirements.

That is, the constituent elements are a seat body (2) on which a user can sit, and an elevating device (10) for vertically displacing the seat body (2). A lifting device (10) having a first member (11) and a second member (12) that are relatively displaced; a first hook (13) displaceably connected to the second member (12); a first hook (13) displaceable within a range including at least a lock position engaged with a first engaged portion (11C) provided on the member (11) and a release position where the engagement is released; A release device (20) for displacing a first hook (13) toward a release position; and a second hook (21) provided on the release device (20), provided on the first hook (13). a second hook (21) displaceable within a range including at least an engaging position for engaging with the engaged second engaged portion (13A) and a non-engaging position for releasing the engagement; 20) and displaceably connected to the second hook (21), when an operation force is applied while the second hook (21) is in the engaged position, a release lever (22) capable of displacing the first hook (13) until the engagement between the first engaged portion (11C) and the first hook (13) is released; A return mechanism (23) provided in the device (20), wherein when the engagement between the first hook (13) and the first engaged portion (11C) is released, the second hook (21) a return mechanism (23) capable of displacing to the disengaged position.

Accordingly, in the vehicle seat, when an unintended operating force acts on the release lever (22) to release the engagement between the first hook (13) and the first engaged portion (11C), , the second hook (21) is in the disengaged position. Therefore, the first hook (13) can return to the locked position regardless of the position of the release lever (22).

The vehicle seat may have the following configuration.

That is, it is desirable that the first hook (13) and the release lever (22) are rotatably supported by the shaft (16) supported by the second member (12). As a result, the first hook (13) and the release lever (22) are supported by the same shaft (16).

Therefore, compared to a configuration in which the shaft for supporting the first hook (13) and the shaft for supporting the release lever (22) are provided separately, the number of parts and assembly man-hours for the vehicle seat are reduced. In addition, the occurrence of malfunction due to dimensional variations during assembly is reduced.

The first hook (13) is desirably arranged on the opposite side of the release lever (22) across the second member (12). As a result, a load acts on one axial end side and the other axial end side of the shaft portion (16).

Therefore, compared to the structure in which the load of the first hook (13) and the load of the release lever (22) act only on one end side of the shaft (16) in the axial direction, the load balance approaches an appropriate state, thus preventing malfunction. occur less.

It is desirable to have a lock spring (14) that exerts a resilient force to displace the first hook (13) towards the locked position. As a result, the first hook (13) can be reliably returned to the locked position.

The return mechanism (23) includes an engagement spring (23A) that exerts an elastic force to displace the second hook (21) toward the engagement position, and a first engaged portion (11C) and the first hook (13). ) is released, the second hook (21) is brought into contact with the abutted portion (21B) provided on the second hook (21) to move the second hook (21) to the non-engaging position. It is desirable to have a contact portion (23B) that can be displaced to

The release device (20) has an actuator (24B) capable of exerting an operating force to displace the release lever (22). When (10) operates, it is desirable to displace the release lever (22) until the abutting portion (23B) contacts the abutted portion (21B). As a result, the first hook (13) can be reliably returned to the locked position.

Incidentally, the symbols in each parenthesis above are examples showing the correspondence with the specific configurations and the like described in the embodiments described later, and the present disclosure is not limited to the specific configurations and the like indicated by the symbols in the parentheses. .

It is a figure showing a vehicle seat concerning a 1st embodiment. FIG. 3 is an exploded view of the releasing device and the like according to the first embodiment; It is a figure which shows the cancellation|release apparatus etc. which concern on 1st Embodiment. It is a figure which shows the cancellation|release apparatus etc. which concern on 1st Embodiment. It is a figure which shows the cancellation|release apparatus etc. which concern on 1st Embodiment. It is a figure which shows the axial part etc. which concern on 1st Embodiment. It is a figure which shows the cancellation|release apparatus etc. which concern on 1st Embodiment. It is a figure which shows the cancellation|release apparatus etc. which concern on 1st Embodiment. It is a figure which shows the cancellation|release apparatus etc. which concern on 1st Embodiment. It is a figure which shows the cancellation|release apparatus etc. which concern on 1st Embodiment.

The following "embodiment of the invention" shows an example of an embodiment belonging to the technical scope of the present disclosure. In other words, the matters specifying the invention described in the claims are not limited to the specific configurations, structures, etc. shown in the following embodiments.

The present embodiment is an example in which a vehicle seat according to the present disclosure is applied to a seat mounted in a vehicle such as a vehicle (hereinafter referred to as a vehicle seat). Directional arrows, oblique lines, etc. in each drawing are provided to facilitate understanding of the relationship between the drawings and the shapes of members or parts.

Therefore, the vehicle seat is not limited to the directions shown in each drawing. The direction shown in each drawing is the direction in which the vehicle seat according to the present embodiment is assembled to the vehicle. Figures with hatching do not necessarily show cross-sectional views.

At least one member or portion described with at least a reference numeral is provided unless otherwise specified as "one" or the like. In other words, two or more members may be provided unless there is a notice such as "one". The vehicle seat shown in the present disclosure includes at least components such as the members or portions labeled and described.

(First embodiment)
<1. Overview of vehicle seats>
The vehicle seat 1 includes at least a seat body 2, a lift device 10, a release device 20, and the like, as shown in FIG. In the vehicle seat 1 according to the present embodiment, the lifting device 10 and the releasing device 20 are provided at one end and the other end in the seat width direction.

<Seat body>
The seat body 2 is a member on which a user can sit. The seat body 2 has at least a seat cushion 3, a seat back 5, and the like. The seat cushion 3 is a part for supporting the buttocks of the seated person. The seat back 5 is a part for supporting the back of the seated person.

<Lifting device>
Each lifting device 10 is a device for lifting and displacing the seat body 2 . The lift device 10 provided at one end in the seat width direction and the lift device 10 provided at the other end in the seat width direction have a symmetrical structure with respect to the center in the seat width direction.

<Release device>
Each releasing device 20 is a device for putting each lifting device 10 into an operable state. The release device 20 provided at one end in the seat width direction and the release device 20 provided at the other end in the seat width direction have symmetrical structures with respect to the center in the seat width direction.

<2. Details of the lifting device>
Each lifting device 10 includes at least a first member 11, a second member 12, a first hook 13, a lock spring 14, and the like, as shown in FIG. Note that the following description is mainly about the lifting device 10 provided on the left end side.

<Lifter link and side frame>
A first member 11 (hereinafter referred to as a first lifter link 11) and a second member 12 (hereinafter referred to as a side frame 12) are members that are displaced relative to each other when the seat body 2 is vertically displaced.

Specifically, the side frame 12 is a lower arm that forms the skeleton of the seat cushion 3 and extends in the front-rear direction of the seat. The first lifter link 11 is a link member rotatably connected to the side frame 12 .

The upper end side of the first lifter link 11 is rotatably connected to the side frame 12 via the first connecting pin 11A. A lower end side of the first lifter link 11 is rotatably connected to the vehicle via a second connecting pin 11B.

In addition, the lower end side of the first lifter link 11 according to this embodiment is indirectly connected to the vehicle via the slide device 30 . The slide device 30 is a device that slidably supports the vehicle seat (seat body 2).

As shown in FIG. 3, the lifting device 10 according to the present embodiment has a second lifter link 15C, a drive unit 15, etc. in addition to the first lifter link 11, etc. As shown in FIG. The second lifter link 15C is arranged on the seat front side with respect to the first lifter link 11 .

The second lifter link 15C has an upper end rotatably connected to the side frame 12 and a lower end rotatably connected to the vehicle via the slide device 30 . The driving unit 15 generates a driving force for vertically displacing the seat body 2 .

The drive unit 15 has at least an electric motor 15A. The electric motor 15A applies rotational force to a sector gear (sectoral gear) 15D. The sector gear 15D is integrated with the upper end side of the second lifter link 15C and is rotatable with respect to the side frame 12 together with the second lifter link 15C.

Therefore, when the electric motor 15A is operated, the second lifter link 15C rotates around the lower end side, so that the side frame 12, that is, the seat body 2 is vertically displaced. At this time, the first lifter link 11 and the second lifter link 15C are displaced relative to the side frame 12 so that the angle formed with the side frame 12 is increased or decreased.

The drive unit 15 according to this embodiment has a spring (in this embodiment, a spiral spring) 15B for assisting the electric motor 15A. The spring 15B exerts an elastic force that causes the seat body 2 to be displaced upward.

That is, the spring 15B increases its elastic deformation amount when the seat body 2 is displaced downward, and restores itself when the seat body 2 is displaced upward. Therefore, the spring 15B assists the electric motor 15A when the seat body 2 is displaced upward.

<First hook>
The first hook 13 is connected to the side frame 12 so as to be displaceable. The first hook 13 can be displaced within a range including a locked position (see FIG. 4) and an unlocked position (see FIG. 5).

As shown in FIG. 4, the locked position is a position where the first hook 13 can be engaged with the first engaged portion 11C (see FIG. 2). The release position is a position where the engagement is released, as shown in FIG.

That is, the first hook 13 is rotatably supported by a shaft portion 16 (see FIG. 2) supported by the side frame 12 . As shown in FIG. 6, the shaft portion 16 passes through the side frame 12 and is supported by the side frame 12 at its longitudinal intermediate portion.

The shaft portion 16 is provided with a flange portion 16A and a detent portion 16B. The flange portion 16A is a brim-shaped portion protruding from the pin-shaped shaft main body 16C. The rotation preventing portion 16B is a portion that restricts the shaft portion 16 from rotating with respect to the side frame 12. As shown in FIG.

The anti-rotation portion 16B according to this embodiment is composed of two parallel surfaces. For this reason, the side frame 12 is provided with a through hole 12A (see FIG. 2) that is congruent with the detent portion 16B.

The flange portion 16A is located outside the side frame 12 (on the left side in FIG. 6). The outer side of the side frame 12 means the side opposite to the inner side with the side frame 12 interposed therebetween when the space between the two side frames 12 is defined as the inner side.

A shaft bracket 16H that supports the shaft portion 16 is provided inside the shaft portion 16 in the longitudinal direction. Axle bracket 16H is secured to side frame 12 by at least one fastener 16D, as shown in FIG.

The fastener 16D is a screw, bolt, rivet, or the like. A snap ring 16E is fitted inside the shaft bracket 16H in the longitudinal direction of the shaft portion 16. As shown in FIG. This prevents the shaft portion 16 from falling off from the shaft bracket 16H.

The first engaged portion 11</b>C is a pin-shaped striker provided on the first lifter link 11 . The first engaged portion 11C is fixed to the arm 11D of the first lifter link 11, as shown in FIG. The arm 11D is a portion extending from the lower end side of the first lifter link 11 toward the shaft portion 16 side.

<Lock spring>
The lock spring 14 is an elastic body that exerts an elastic force that displaces the first hook 13 toward the lock position. As shown in FIG. 2, the lock spring 14 according to this embodiment is a spiral "spring".

The center portion of the lock spring 14 has a rectangular hole shape and is engaged with the detent portion 16B of the shaft portion 16, and the outer peripheral end thereof is engaged with and engaged with the first hook 13. As shown in FIG. Then, when the first hook 13 is rotationally displaced toward the release position, the lock spring 14 is largely flexed and deformed. Therefore, the lock spring 14 exerts an elastic force that displaces the first hook 13 toward the lock position.

<3. Details of the release device>
Each release device 20 includes at least a second hook 21, a release lever 22, a return mechanism 23, and the like, as shown in FIG. Note that the following description is mainly about the lifting device 10 provided on the left end side.

The second hook 21 , the release lever 22 , and at least part of the return mechanism 23 are arranged on the opposite side of the side frame 12 from the first hook 13 , that is, on the outside of the side frame 12 .

<Second hook>
The second hook 21 is a member that can be displaced within a range including at least an engaged position and a non-engaged position. The engagement position, as shown in FIG. 7, is a position where it can be engaged with the second engaged portion 13A. The disengaged position is the disengaged position, as shown in FIG.

The second hook 21 is connected to the release lever 22 in a displaceable state. Specifically, the second hook 21 is connected to the distal end side in the extension direction of the release lever 22 via a hinge pin 21A so as to be rotatably displaceable.

The second engaged portion 13A is a pin-shaped engaged portion provided on the first hook 13 and displaces together with the first hook 13, as shown in FIG. As shown in FIG. 8, the second engaged portion 13A passes through the through hole 12B from the inside to reach the outside. The through hole 12B is provided in the side frame 12 and is curved in an arc centered on the shaft portion 16 .

<Release lever>
The release lever 22 is a member that can be displaced with respect to the side frame 12 . Specifically, as shown in FIG. 7 , the release lever 22 is supported by the shaft portion 16 outside the side frame 12 and is rotatable about the shaft portion 16 .

The release lever 22 is in a state in which the engagement between the first engaged portion 11C and the first hook 13 is released (for example, the 5), the first hook 13 can be displaced.

That is, when the release lever 22 receives an operation force from the operation cable 24A while the second hook 21 is engaged with the second engaged portion 13A, the release lever 22 is indicated by an arrow D1 in FIG. It is rotationally displaced in the direction (hereinafter referred to as the release direction).

Therefore, when an operating force acts on the release lever 22, the first hook 13 is rotationally displaced from the lock position toward the release position. The operation cable 24A according to this embodiment is operated by an electric actuator 24B (see FIG. 1).

A reduction mechanism (not shown) and a one-way clutch mechanism (not shown) are integrated with the actuator 24B. The one-way clutch mechanism transmits an operating force that rotates the release lever 22 in the releasing direction, and blocks transmission of an operating force in the opposite direction.

The speed reduction mechanism is provided with a return mechanism (for example, a spiral spring). Therefore, even if the operation of the actuator 24B is stopped halfway, the release mechanism displaces the release lever 22 in the lock direction (opposite to the release direction).

The return spring 22A shown in FIG. 2 has an elastic force that displaces the release lever 22 to a position where the second hook 21 can be engaged with the second engaged portion 13A when the first hook 13 is in the locked position. demonstrate.

That is, the return spring 22A exerts an elastic force that rotates the release lever 22 in the direction opposite to the arrow D1 (see FIG. 7). Therefore, when the actuator 24B stops, the release lever 22 returns to the position shown in FIG. Note that the retaining ring 16</b>F is a member that prevents the release lever 22 from falling off from the shaft portion 16 .

<Return mechanism>
The return mechanism 23 is a mechanism for displacing the second hook 21 to the non-engaged position when the engagement between the first hook 13 and the first engaged portion 11C is released. As shown in FIG. 2, the return mechanism 23 includes at least an engagement spring 23A and a contact portion 23B.

The engagement spring 23A exerts an elastic force that displaces the second hook 21 toward the engagement position. The abutting portion 23B is a portion for displacing the second hook 21 to the disengaged position when the engagement between the first engaged portion 11C and the first hook 13 is released. be.

That is, the second hook 21 is provided with a contacted portion 21B (see FIG. 7) that can contact the contact portion 23B. When the release lever 22 rotates from the position shown in FIG. 7 in the release direction D1, the contacted portion 21B comes into contact with the contact portion 23B, and the second hook 21 is rotationally displaced from the engaged position to the non-engaged position. (See FIG. 8).

When the second hook 21 reaches the disengaged position, the first hook 13 is returned to the locked position by the elastic force of the lock spring 14 . When the abutted portion 21B is separated from the abutting portion 23B, the second hook 21 is returned to the engaging position by the elastic force of the engaging spring 23A.

The contact portion 23B is a projecting portion provided on the base plate 25 fixed to the side frame 12 . The base plate 25 is fixed to the side frame 12 with fasteners 16D such as bolts and nuts 16G.

In addition, as shown in FIG. 2, the base plate 25 is provided with a through hole 25A and a locking portion 24C. The through hole 25A is a through hole through which the anti-rotation portion 16B of the shaft portion 16 penetrates and which is congruent with the anti-rotation portion 16B. The locking portion 24C is a portion where the outer tube of the operation cable 24A is locked and fixed.

<4. Operation of Elevating Device, Release Device, Etc.>
<4.1 Definition of operating state>
<Locked state>
4 and 7, that is, the first hook 13 is engaged with the first engaged portion 11C, and the second hook 21 and the second engaged portion are locked. It refers to a state in which the joining portion 13A is engaged.

<Lockable state>
The lockable state refers to a state in which the first hook 13 is not engaged with the first engaged portion 11C and the first hook 13 is in the position shown in FIG. 4, that is, in the locked position.

Since the first hook 13 can be engaged with the first engaged portion 11C when the seat body 2 is at the lowest position (hereinafter referred to as the basic position), the seat body 2 is lifted from the basic position. In this state, it is not in the locked state, but in the lockable state.

<Recoverable state>
5 and 8, that is, the engagement state between the first hook 13 and the first engaged portion 11C is released, and the second hook 21 and the second hook 21 are released. A state in which the engagement state with the second engaged portion 13A is also released.

<First release state>
The released state is the state in which the release device 20 is shown in FIG. A state in which the joint portion 13A is engaged with the contact portion 23B and the contacted portion 21B is not in contact with the contact portion 23B.

<Second release state>
The released state is the state in which the release device 20 is shown in FIG. 10, that is, the state of engagement between the first hook 13 and the first engaged portion 11C is released, and the second hook 21 and the second engaged portion 11C are released. It is a state in which the joint portion 13A is engaged and the contact portion 23B and the contacted portion 21B are in contact.

<4.2 Details of Operation>
<Upward movement>
When the seat body 2 is in the basic position and the release device 20 is in the locked state and the lifting device 10 is moved upward, the release device 20 is in the first released state (see FIG. 9) after the actuator 24B is operated. At some point, the electric motor 15A begins to operate.

As a result, the seat body 2 begins to move upward and the release lever 22 rotates in the release direction, so that the state of the release device 20 changes in the order of the first release state, the second release state, and the returnable state.

Actuator 24B stops when electric motor 15A stops. As a result, the release lever 22 is returned to the position shown in FIG. 7 by the elastic force of the return spring 22A, and the second hook 21 and the second engaged portion 13A are again returned to the engaged state.

<During descent operation>
Since the seat body 2 is above the basic position, the release device 20 is in a state in which the release device 20 can be returned while the actuator 24B and the electric motor 15A are stopped. When the lifting device 10 is lowered in this state, the actuator 24B starts to operate after the electric motor 15A operates and immediately before the first hook 13 and the first engaged portion 11C come into contact with each other.

As a result, the seat body 2 begins to descend and the release lever 22 rotates in the release direction, so that the state of the release device 20 changes in the order of the first release state, the second release state, and the returnable state.

Actuator 24B stops when electric motor 15A stops. As a result, the release lever 22 is returned to the position shown in FIG. 7 by the elastic force of the return spring 22A, and the second hook 21 and the second engaged portion 13A are again returned to the engaged state.

Then, when the seat body 2 is lowered to the basic position, the first engaged portion 11C contacts a cam portion (not shown) provided on the first hook 13, and the first hook 13 is moved as shown in FIG. The elastic deformation of the lock spring 14 increases as it is displaced to the position where the lock spring 14 is pushed.

When the first engaged portion 11C is further lowered, the first hook 13 returns to the locked position due to the elastic force of the lock spring 14 because the first engaged portion 11C and the cam portion are out of contact with each other. Then, the release device 20 is locked.

<5. Features of Vehicle Seat According to Present Embodiment>
In the vehicle seat 1 according to this embodiment, when the first hook 13 and the first engaged portion 11C are disengaged, the second hook 21 can be displaced to the non-engaged position. A return mechanism 23 is provided.

Accordingly, in the vehicle seat 1, when an unintended operating force acts on the release lever 22 and the engagement between the first hook 13 and the first engaged portion 11C is released, the second hook 21 is released. is in the disengaged position.

Therefore, the first hook 13 can be returned to the locked position regardless of the position of the release lever 22 . That is, when an operating force acts on the release lever 22, the release device 20 automatically enters the locked state or the lockable state.

The first hook 13 and the release lever 22 are rotatably supported by a shaft portion 16 supported by the side frame 12 . Thereby, the first hook 13 and the release lever 22 are configured to be supported by the same shaft portion 16 .

Therefore, compared to a configuration in which a shaft for supporting the first hook 13 and a shaft for supporting the release lever 22 are provided separately, the number of parts and the number of assembly man-hours for the vehicle seat 1 are reduced, and Occurrence of malfunction due to dimensional variation during assembly is reduced.

The first hook 13 is arranged on the side opposite to the release lever 22 with the side frame 12 interposed therebetween. As a result, a load acts on the axial one end side and the other axial end side of the shaft portion 16 .

Therefore, compared to the structure in which the load of the first hook 13 and the load of the release lever 22 act only on one axial end side of the shaft portion 16, the load balance approaches an appropriate state, and malfunctions are less likely to occur.

The vehicle seat 1 includes a locking spring 14 that displaces the first hook 13 toward the locking position. As a result, the first hook 13 can be reliably returned to the locked position.

When the engagement between the first engaged portion 11C and the first hook 13 is released, the return mechanism 23 comes into contact with the contacted portion 21B provided on the second hook 21. It has a contact portion 23B capable of displacing the second hook 21 to the non-engaging position.

As a result, the release lever 22 receives the operation force and rotates, and when the contacted portion 21B and the contact portion 23B contact each other, the second hook 21 is placed in the non-engaging position, and the release device 20 is in a lockable state. becomes.

When the lifting device 10 operates when the first hook 13 is in the locked position, the actuator 24B displaces the release lever 22 until the abutting portion 23B contacts the abutted portion 21B. As a result, the first hook 13 is brought into a state in which it can be reliably returned to the lock position, that is, in a lockable state.

(Other embodiments)
In the embodiment described above, the lower end side of the first lifter link 11 is indirectly connected to the vehicle via the slide device 30 . However, the present disclosure is not so limited. That is, the disclosure may be, for example, a configuration in which the lower end side of the first lifter link 11 is directly connected to the vehicle without the slide device 30 interposed therebetween.

The first engaged portion 11C according to the embodiment described above is indirectly fixed to the first lifter link 11 via the arm 11D. However, the present disclosure is not so limited. That is, the disclosure may be, for example, a configuration in which the first engaged portion 11C is fixed directly to the first lifter link 11 without interposing the arm 11D.

The release lever 22 according to the above-described embodiment is configured to receive an operation force from the operation cable 24A and the actuator 24B. However, the present disclosure is not so limited. That is, the disclosure may be configured such that the release lever 22 receives an operating force directly from an electric motor, a manual lever, or the like, for example.

In the above-described embodiment, the first hook 13 and the release lever 22 are supported by the same shaft portion 16 . However, the present disclosure is not so limited. That is, the disclosure may have a configuration in which, for example, a shaft portion that supports the first hook 13 and a shaft portion that supports the release lever 22 are provided.

In the above-described embodiment, the lock spring 14 is provided. However, the present disclosure is not so limited. That is, for example, instead of the lock spring 14, the first hook 13 is returned to the locked position using gravity, or the first hook 13 is directly displaced by an electric motor. may

The return mechanism 23 according to the above-described embodiment is configured with the engagement spring 23A, the contact portion 23B, and the like. However, the present disclosure is not so limited. That is, the disclosure may be configured to displace the second hook 21 to the non-engagement position with the operation cable 24A, for example.

In the above-described embodiment, the first lifter link 11 is an example of the first member, and the side frame 12 is an example of the second member. However, the present disclosure is not so limited.

That is, the disclosure includes, for example, a configuration in which the slide device 30 is an example of the first member and the side frame 12 is an example of the second member, or the first lifter link 11 is an example of the first member and the slide device 30 may be an example of the second member.

In the embodiment described above, the vehicle seat according to the present disclosure is applied to the vehicle. However, the application of the invention disclosed herein is not so limited. That is, the disclosure is applicable to, for example, seats used in vehicles such as railroad cars, ships, and aircraft, as well as stationary seats used in theaters, homes, and the like.

Furthermore, the present disclosure is not limited to the embodiments described above as long as it conforms to the gist of the disclosure described in the embodiments described above. Therefore, in the configuration in which at least two of the above-described embodiments are combined, or in the above-described embodiments, any one of the illustrated constituent elements or the constituent elements described with reference numerals is abolished. It may be configured as

DESCRIPTION OF SYMBOLS 1... Vehicle seat 2... Seat main body 2... Side frame 3... Seat cushion 5... Seat back 10... Lifting device 11... First lifter link (first member)
11C... First engaged portion 12... Side frame (second member)
DESCRIPTION OF SYMBOLS 13... 1st hook 13A... 2nd engaged part 14... Lock spring 15... Drive part 16... Shaft part 20... Release device 21... Second hook 21A... Hinge pin 21B... Contacted part 22... Release lever 22A... Return spring 23... Return mechanism 23A... Engagement spring 23B... Contact part 24A... Operation cable

Claims (7)

In a vehicle seat mounted on a vehicle,
a seat body on which a user can sit;
a lifting device for vertically displacing the seat body, the lifting device having a first member and a second member that are displaced relative to each other when the seat body is vertically displaced;
A first hook that is displaceably connected to the second member, and has at least a lock position in which it is engaged with a first engaged portion provided in the first member and a release position in which the engagement is released. a first hook displaceable within a range including;
a release device for displacing the first hook toward the release position;
A second hook provided on the release device, which includes at least an engaging position for engaging with a second engaged portion provided on the first hook and a non-engaging position where the engagement is released. a second hook displaceable within a range;
A release lever that is provided in the release device and to which the second hook is displaceably connected, the release lever receiving an operation force in a state where the second hook is in the engaged position, the first engaged lever. a release lever capable of displacing the first hook until the engagement between the portion and the first hook is released;
A return mechanism provided in the release device displaces the second hook to the non-engaged position when the engagement between the first hook and the first engaged portion is released. A vehicle seat comprising a return mechanism capable of 2. The vehicle seat according to claim 1, wherein said first hook and said release lever are rotatably supported by a shaft supported by said second member. 3. The vehicle seat according to claim 2, wherein the first hook is arranged on the opposite side of the release lever with the second member interposed therebetween. The vehicle seat according to any one of claims 1 to 3, further comprising a lock spring exerting an elastic force to displace the first hook toward the locked position. The return mechanism is
an engaging spring exerting an elastic force for displacing the second hook toward the engaging position; and when the engagement between the first engaged portion and the first hook is released. 5. The vehicle seat according to claim 4, further comprising: an abutting portion capable of contacting a abutted portion provided on the second hook and displacing the second hook to the non-engaging position. The release device has an actuator capable of exerting an operating force for displacing the release lever,
6. The actuator according to claim 5, wherein the actuator displaces the release lever until the abutting portion contacts the abutted portion when the lifting device operates when the first hook is in the lock position. Vehicle seat as described. The second member is a side frame that constitutes the skeleton of the seat cushion and extends in the front-rear direction of the seat,
The vehicle seat according to any one of claims 1 to 6, wherein said first member is a lifter link rotatably connected to said side frame.

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