JPH069885Y2 - Vertical drive device for vehicle seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a vehicle seat, and more particularly, to an improvement of a vehicle seat vertical drive device for vertically moving a seat body by expanding and contracting an elastic body below the seat.

(Prior Art and Problems Thereof) Conventionally, a drive device of this type has been disclosed in Japanese Utility Model Publication No. 57-122426.
The air suspension (stretchable body) disposed below the seat body in the reference.
The seat was vertically adjusted by the expansion and contraction of the sheet.

However, in the drive device of the above-mentioned reference, the seated position of the seat body is maintained only by the inflated air suspension, so if the air escapes due to some factor, There was a risk that the set position could not be maintained and the seat position suddenly dropped.

(Problems to be Solved by the Invention) The present invention has been made in view of the above problems of the prior art, and its purpose is to prevent the seat body from moving up and down by expanding and contracting the elastic body. Along with
It is an object of the present invention to provide a vehicle seat vertical drive device that engages and disengages a holding mechanism that holds a seat body at a predetermined position.

Further, after the expansion of the expansion member for the holding mechanism, the expansion member for vertically moving the seat is expanded or contracted.

(Means for Solving the Problem) The technical means made by the present invention to achieve the above-mentioned object are a vertical drive mechanism for vertically moving the seat body and a seat body for holding the vertically driven seat body in a predetermined position. The holding mechanism and an air supply / discharge mechanism for supplying / discharging air to / from both of the above mechanisms are provided, and the vertical drive mechanism is provided with support legs for supporting the seat main body vertically movable over the lower surface of the seat main body and the mounting plate. A telescopic body for vertically moving the seat, which moves the seat body up and down by expansion and contraction, is disposed below the seat body, and the seat body holding mechanism can be engaged with an engaged portion provided at a required position of the seat body. A holding portion formed in a substantially L shape with a vertical portion provided with various engaging portions and a horizontal portion extending to the lower end of the vertical portion is provided with a horizontal portion at a required position of the mounting plate below the seat body. It is attached so that it can be rotated back and forth, and the holding part is rotated back and forth by expansion and contraction between the horizontal part and the mounting plate to disengage the engaging part from the engaged part of the seat body. It is provided with an expandable / contractible body for rotating the holding part back and forth, and the expandable / contractible body for vertically moving the seat and the expandable / retractable body for rotating the holding part back and forth are each constituted by an air bag body which is superposed in communication with each other. In addition, the expansion / contraction body for forward / backward rotation is formed to have a smaller capacity than the expansion / contraction body for vertical movement, and each is connected to the air supply / discharge mechanism, and the air supply / discharge mechanism is an air pump and the air pump. After opening and closing the on-off valve provided in the air supply pipe that connects the respective expansion and contraction bodies with the expansion and contraction body for forward and backward rotation to release the engagement of the holding portion, the expansion and contraction body for vertical drive is expanded or Shrink and expand / contract for vertical drive Expansion, a control structure allowed to contract the telescopic member for simultaneously back-and-forth rotation contracting operation ends and is to be configured in tandem to the above on-off valve and air pump.

(Operation) When the seat main body is lifted by the above-mentioned technical means, when air is supplied by the air supply / discharge mechanism, first, before the expansion and contraction of the expansion / contraction body for moving the seat up and down, the small holding portion is rotated forward and backward. The expandable body immediately expands in the direction in which the air bag body forming the expandable body overlaps between the back surface of the horizontal portion of the holding portion and the front surface of the mounting plate.

Therefore, since the horizontal portion of the holding portion is pushed up by the expansion operation, the entire holding portion rotates rearward with the shaft attachment portion as a fulcrum, and the vertical engaging portion disengages from the engaged portion of the seat body. Then, the holding state of the seat body is released.

Then, after releasing the holding state, the elastic body for vertically moving the seat expands between the lower surface of the seat body and the mounting plate in the direction in which the air bag body constituting the elastic body for vertically moving the seat overlaps, When the main body is lifted and the air supply is stopped at the required optimum position of the seat main body, the air in the telescopic body for rotating the holding portion back and forth is discharged.

Therefore, the telescopic body for rotating the holding part back and forth contracts and the holding part rotates forward. That is, the action of pushing up the horizontal portion of the holding portion is released, the horizontal portion descends to the mounting plate side, the vertical portion falls to the seat body side, and the engaging portion provided on the vertical portion. Engages with an engaged portion provided on the seat body to hold the seat body at the optimum position.

When the seat body is lowered, air is first injected into the telescopic body for forward and backward rotation to expand the air in the telescopic body for vertical movement.

Therefore, due to the expansion of the telescopic body for rotating back and forth, the holding portion rotates backward, and the engagement of the engaging portion of the vertical portion with the engaged portion of the seat body is released, so that the seat body can move up and down. Then, if the air in the expandable / contractible body for vertical movement is discharged, the seat body descends, and if the air discharge operation is stopped at the required optimum position, the air in the expandable / contractible body for the forward / backward rotation is discharged, The holding portion rotates forward and the vertical engaging portion engages with the engaged portion of the seat body to hold the seat body at the optimum position.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The vehicle seat vertical drive device of the present invention comprises a seat body vertical drive mechanism, a seat body holding mechanism, and an air supply / discharge mechanism.

In the figure, (a) shows a conventionally known seat body, which is composed of a headrest portion (1), a backrest portion (2) and a seat portion (3), and the backrest portion (2) is a seat portion ( The seat body (a) has a frame (not shown) that serves as a skeleton for each of the headrest portion (1), the backrest portion (2), and the seat portion (3) and is made of a steel plate. Etc., and the cushion material (101) and the trim cover (102) with the required thickness are separately covered around each frame, or the whole is integrally covered with the trim cover (102). Well, there is no particular restriction.

The up-and-down drive mechanism is provided with support legs (c) and (c) on the left and right in the vehicle traveling direction, respectively, across the seat body (a) and the mounting plate (b) attached and fixed to the floor surface, and the support legs (c). )
In the space (x) formed between (c), between the lower surface (a ') of the seat body (a) and the mounting plate (b), a vertically movable stretchable body (4) for the seat body (a) is provided. ) Is provided.

Further, in the figure, when disposing the up-and-down moving elastic body (4) in the space (x), the platform (f) is used on the mounting plate (b), but it is optional.

The support legs (c) are integrally formed by axially attaching long flat plate bodies (c ') and (c') in a crossed manner, and each free end of the support leg (c) is placed on the lower surface (a ') of the seat body (a) and the mounting body. Attached to mounting support portions (5) provided on the front and rear sides of each of the mounting plates (b), the shafts are mounted on the left and right sides of the vehicle between the seat body (a) and the mounting plate (b).

At this time, of the mounting support portions (5), the mounting support portions (5 ') provided on the rear side are provided with required lateral grooves (5a), and the lateral grooves (5a) are provided with support legs (c). By attaching the corresponding ends slidably, the supporting legs (c) are pantograph-shaped and support the seat body (a) so as to be vertically movable.

The seat body holding mechanism is provided with an engaging portion (6) capable of engaging with an engaged portion (e) formed on the rear surface (3 ′) of the seat portion (3) of the seat body (a). And a retractable body (4 ') for rotating the retaining section (d) back and forth.

The holding part (d) includes a horizontal part (d ₁ ) and a vertical part (d ₂ ).
And an engaging portion (6) having a substantially L-shaped side surface and having a groove formed in the horizontal direction on the front surface of the vertical portion (d ₂ ).
, And the vertical portion (d ₂ ) has a length sufficient to engage with the engaged portion (e) when the seat body (a) moves up and down.

The holding portion (d) is provided outside the support leg (c) and in the mounting groove portion (7) provided so as to project from the rear end edge of the mounting plate (b). A bent portion (for example, a horizontal portion (d ₁ )) is pivotally attached to be rotatable back and forth, and an extension / contraction body for forward / backward rotation (between the front end surface of the horizontal portion (d ₁ ) and the mounting plate (b) ( 4 ').

Next, a vertically movable stretchable body (4) for the seat body (a).
And, the back-and-forth rotating elastic body (4 ') for the holding portion (d) will be described. An air bag body (4a) or (4'a) molded using a molding sheet (9) having a three-layer structure is used. A plurality of, for example, two, which are superposed on each other, and in the present embodiment, the vertically movable stretchable body (4) is a superposed portion of the superposed air bag bodies (4a) (4a) as shown in FIG. It is made by heat welding the central part of the contact surface of
On the other hand, as shown in FIG. 7, the forward-backward rotating telescopic body (4 ') constitutes the vertical moving telescopic body (4).
Air bag body (4'a) with smaller capacity than a)
(4'a) are overlapped and the portion along one side edge is joined by heat welding or the like, so that the other side edge facing the joint portion when expanded expands into a substantially V-shaped cross section. The air holes (10) (which extend and communicate the air chambers (8) of the respective air bag bodies (4a) ... Or the air chambers (8 ') of (4'a) ... 10 ') is opened, and air supply ports (11), (11') for letting air in and out of the air chambers (8), (8 ') are provided (see FIGS. 6 to 8).

In addition, each air bag body (4a) ... or (4 ')
The joining method of a) ... and the number of stacks are not limited in any way, and may be arbitrarily adjusted to the pushing space.

That is, since the stretchable bodies (4) and (4 ') are configured by stacking a plurality of air bag bodies (4a) (4a), (4'a) and (4'a), the stretchable bodies (4) (4') It is possible to lengthen the stroke of ′), and it is possible to appropriately correspond to the vertical movement range of the seat body (a).

Here, an example of the air bag body (4a) (4'a) will be described. The air bag body (4a) (4 ').
a) has a thickness of 50 to 10 that has both non-stretchability and high tensile strength.
Number of meshes woven with 0 micron yarn, for example, polyester or polyamide yarn 70-200 cloth material (9
Two thermoplastic synthetic resin sheets (9b) made of thermoplastic soft urethane resin or the like, which is a) slightly harder than the usual one
While sandwiched by (9b), the two thermoplastic synthetic resin sheets (9b) and (9b) are entirely heat-welded together to form a three-piece (9
b) A molding sheet (9) formed by integrally molding (9a) and (9b) is cut into a required shape (generally rectangular shape in the illustrated example), and two molding sheets (9) are superposed on each other. ,
The peripheral edges are heat-welded to each other for molding (see FIGS. 6 to 8).

In addition, the above-mentioned forming sheet (9) should be prevented from being stretched by the cloth material (9a), and the meat pressure of the forming sheet (9) itself should be suppressed to such an extent that the flexibility of the sheet (9) is not impaired. You can

Further, the air bag bodies (4a) (4'a) molded by using the molding sheet (9) are less deformed when high pressure is applied to the air chambers (8) (8 '), and Wrinkles due to lack of flexibility are less likely to occur during expansion.

Then, each of the elastic bodies (4) configured as described above,
(4 ') are fixed to the above-mentioned appropriate places and connected to the air supply / discharge mechanism.

The air supply / exhaust mechanism includes an air pump (13) and an on-off valve (14) provided on air supply pipes (14a) (14b) that connect the air pump (13) to the respective expandable members (4) (4 '). 12) (12 ') and the above-mentioned back-and-forth rotating expandable body (4') are expanded to release the engagement of the holding portion (d), and then the vertical drive expandable body (4) is expanded or contracted. The opening / closing valve (12) (1) is provided with a control section (16) for contracting the expansion / contraction body (4 ') for forward / backward rotation at the same time when the expansion / contraction operation of the expansion / contraction body (4) for vertical drive is completed.
2 ') and the air pump (13) are connected to each other (see FIG. 5). In the figure, (15) and (15) indicate connecting pipes provided at the air supply ports (11) and (11 ').

Therefore, when the seat body (a) is first raised, the operation button of the control unit (16) is set to the supply position and the valves (12a), (12b) and (12'a), (12 ') are set.
b) is opened and (12c) and (12'c) are closed, and the air sent from the air pump (13) is supplied to each air supply port (14a) (14b) through each air supply port ( 11) When it is supplied from (11 '), the small-capacity front-rear rotating elastic body (4') expands before the vertical moving elastic body (4).

That is, the ventilation hole (1) is formed from the inside of the air chamber (8 ') of the one air bag body (4'a) constituting the telescopic body (4') for forward and backward rotation.
0 ') to flow into the air chamber (8') of the other air bag body (4'a), and both air bag bodies (4'a)
(4'a) is rapidly expanded to extend the expandable body (4 ') itself into a substantially V-shaped cross section.

Therefore, the horizontal portion (d ₁ ) of the holding portion (d) is pushed up by the expansion operation of the forward-backward rotating telescopic body (4 ′) with the shaft attachment portion as a fulcrum, and the vertical portion (d ₂ ) is rotated backward. , The engaging portion (6) of the vertical portion (d ₂ ) of the seat main body (a)
The seat body (a) is disengaged from the engaged portion (e) provided on the seat portion (3), and the seat body (a) can be raised (see FIG. 4).

Then, after that, the vertical movement expansion / contraction body (4) slowly inflates. In detail, each air bag body (4a) (4a) that constitutes the vertical movement stretchable body (4) expands between the lower surface (a ') of the seat body (a) and the mounting plate (b),
The air bag bodies (4a) (4a) extend in the overlapping direction and push up the lower surface (a ') of the seat body to support legs (c).
The sheet main body (a) is raised while the (c) is extended in a pantograph shape (see FIG. 2).

When the operation button of the control unit (16) is switched to the supply stop position at the required optimum position to stop the air supply, the valves (12a), (12b), (12c) and (1).
2'a) closes and valves (12'b), (12 ')
c) the elastics for back-and-forth rotation holding portion is opened (4 'air) in the exhaust, the elastics (4') is held portion shrinks horizontal portion (d) the (d ₁₎ Since the pushing up pressure disappears, the holding portion (d) pivots forward with the pivotally attached portion as a fulcrum, and the engaging portion (6) of the vertical portion (d ₂ ) is moved. The seat body (a) is engaged with the engaged portion (e) of the seat body (a) to hold the seat body (a) at the set position.

Therefore, at this time, the elastic body (4) for vertically moving the seat body is maintained in the expanded state.

Next, when lowering the seat body (a), when the operation button of the control unit (16) is set to the discharge position, first, only the valves (12'a) and (12'b) are opened and required. Air is supplied to the telescopic body (4) for vertical movement of the seat body for a time (for example, about 2 seconds), and the load applied to the engaging portion (6) and the engaged portion (e) is adjusted to zero. .

Then, after that, air is supplied to the expansion / contraction body (4 ') for rotating the holding part back and forth, the holding part (d) rotates backward and the engaged state is released, and then the valves (12b) and (12c) are released. The air expander (4) is opened by discharging the air in each air bag body (4a) (4a) of the expandable body (4) for vertically moving the seat body.
The seat body (a) is lowered to the optimum position while the support legs (c) and (c) are contracted in a pantograph shape.

Then, be switched control unit of the operation buttons (16) to the discharge stop position, the back-and-forth rotation for elastics (4 ') holding portion contracts air is discharged in the horizontal portion of (d) (d ₁ ) Is released, the holding portion (d) pivots forward around the pivotally attached portion of the holding portion (d), and the engaging portion (6) of the vertical portion (d ₂ ). ) Is the seat body (a)
The seat main body (a) is held at the set position by engaging with the engaged portion (e).

It is to be noted that the above description has been made on the assumption that the telescopic body (4) for vertically moving the seat body and the telescopic body (4 ') for rotating the holding part back and forth are operated by operating the operation button of the one control part (16). It is also optional to provide each with a separate operation button so that they can be operated separately.

Incidentally, the control part (16) is installed on the side part of the seat part (3) which the user can reach for ease of operation.

(Effects of the Invention) As described above, the present invention includes a vertical drive mechanism for the seat body,
There is provided a vehicle seat vertical drive device including a seat body holding mechanism and an air supply / discharge mechanism for supplying and discharging air to and from both of the mechanisms.

Therefore, as in the conventional vertical drive mechanism, holding the predetermined position of the seat body does not rely only on the pressing force of the vertical drive telescopic body, but from the horizontal portion and the vertical portion rotatably provided on the mounting plate. And a substantially L-shaped holding part, which is arranged between the end of the horizontal part of the holding part and the mounting plate.
Since the engaging portion provided on the vertical portion is engaged with and disengaged from the engaged portion provided at the desired position on the seat body by contraction, the seat body can be held safely and securely at a predetermined position.

In addition, after the expansion / contraction body for rotating the holding part back and forth is expanded, the expansion / contraction body for vertically moving the seat expands or contracts, and at the same time as the expansion / contraction operation of the expansion / contraction body for vertical driving is completed, Since the expansion and contraction body for rotation is made to contract, the engagement / disengagement operation of the holding portion is adjusted in accordance with the vertical drive of the seat, so that the operation is easy and reliable.

[Brief description of drawings]

FIG. 1 is a partially omitted side view showing a contracted state of each elastic body in an embodiment of a vehicle seat of the present invention, FIG. 2 is a partially omitted side view showing the expanded state, and FIG. 3 is FIG. No. 4, vertical section front view
FIG. 5 is a side view showing a sectional view of the holding part with a part of the operating state omitted, and FIG. 5 is a schematic view of an air supply system and a control system.
FIG. 6 is an overall perspective view showing a vertically moving elastic body with a part thereof cut away, FIG. 7 is an overall perspective view showing a longitudinal rotating elastic body with a part notched, and FIG. 8 is an embodiment of a forming sheet. It is a perspective view which notches and shows one part. In FIG. (A): a seat body (a '): a seat body underside (b): placing plate, (c): support legs (d): holder, _(d 1): horizontal section _(d 2) : Vertical part (e): Engagement part (4): Seat vertical movement elastic body (4 '): Holding part longitudinal rotation elastic bodies (4a), (4'a): Air bag body (6) : Engagement part (8) (8 '): Air chamber (10), (10'): Vent hole (11), (11 '): Air supply port (12), (12'): Valve (valve) (13): Air pump (14a), (14b): Air supply pipe (15): Connection pipe (16): Controller

 ─────────────────────────────────────────────────── ───Continued from the front page (56) References Shown in Sho 58-49961 (JP, U) Shown in 57-122426 (JP, U) Shown in 63-5846 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A vertical drive mechanism for vertically moving a sheet main body, a sheet main body holding mechanism for holding the vertically driven seat main body at a predetermined position, and an air supply / discharge mechanism for supplying / discharging air to / from both mechanisms. The up-and-down drive mechanism is provided with a support leg for vertically moving the seat body over the lower surface of the seat body and the mounting plate, and a telescopic body for seat up-and-down movement for vertically moving the seat body by expansion and contraction is provided on the lower side of the seat body. The seat body holding mechanism is provided at a vertical portion having an engaging portion that is engageable with an engaged portion provided at a required position of the seat body, and extends to a lower end of the vertical portion. A holding portion formed in a substantially L shape with the horizontal portion is attached to a required position of the mounting plate below the seat body so as to be pivotable back and forth by pivotally mounting the horizontal portion, and the horizontal portion and the mounting plate. Bulge A retractable back-and-forth rotating telescopic body for rotating the holding portion back and forth by contraction so that the engaging portion can be engaged with and disengaged from the engaged portion of the seat body. Each of the stretchable bodies for rotating the holding portion back and forth is composed of a plurality of air bag bodies that are stacked in communication with each other, and the stretchable body for forward and backward rotation has a smaller capacity than the stretchable body for vertically driving. At the same time, each of them is connected to an air supply / discharge mechanism, and the air supply / discharge mechanism is provided with an air pump, an opening / closing valve provided in an air supply pipe for connecting the air pump and each of the expandable / contractible members, and the above-mentioned forward / backward rotation. After the expansion body is expanded to release the engagement of the holding portion, the expansion / contraction body for vertical drive is expanded or contracted, and the expansion / contraction operation of the expansion / contraction body for vertical drive is completed, and at the same time the expansion / contraction for forward / backward rotation is performed. Control unit that contracts the body Vertical drive device for a vehicle seat, characterized in that it is configured in tandem to the above on-off valve and air pump.