JP2015080995A - Vehicle seat device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat device which enables adjustment of length of a seat cushion, suitable for physique of a seating person in to and fro direction, without requiring a laborious operation.SOLUTION: A vehicle seat device includes a seat cushion 5 provided at a floor 1 of a vehicle for sliding in to and fro direction, a sheet length variable part 13 which allows variation in length of the seat cushion in to and fro direction, and a sheet length adjustment part 20 which adjusts length of the seat cushion in to and fro direction according to sliding displacement of the seat cushion in to and fro direction. With this configuration, when the seat cushion is displaced in to and fro direction according to physique of a seating person, the length of the seat cushion in to and fro direction varies in interlocking with the sliding displacement, thus adjustment is made in length of the seat cushion in to and fro direction.

Description

  The present invention relates to a vehicular seat device that sets a longitudinal length of a seat cushion.

A seat installed on the front of an automobile (vehicle) is required to have a good seating comfort in order to reduce fatigue during long-distance driving.
Therefore, the seat is equipped with standard adjustment functions such as enabling the seat cushion to slide back and forth and changing the inclination of the seat back so that it can be seated in a good posture that matches the physique of the seated person. Yes.

  Recently, seats that can change the seat cushion seat length have been proposed. Specifically, the seat has a structure using a seat cushion whose length in the front-rear direction is displaceable, an actuator for changing the length in the front-rear direction of the seat cushion, a switch for operating the actuator, and the like (for example, Patent Documents 1 to 3). 3 etc.). That is, when the seated person performs a switch operation, the actuator is activated to change the length of the seat cushion in the front-rear direction and adjust the seat cushion length of the seat cushion.

JP 2012-111362 A JP2012-25176 JP 2011-225163 A

The adjustment of the length of the seat cushion in the front-rear direction is effective in securing a good seating comfort because a seating surface that supports from the back of the knee to the buttocks can be obtained.
However, adjusting the length of the seat cushion in the front-rear direction by the switch operation as described in Patent Documents 1 to 3, in addition to adjusting the front-rear position of the seat cushion or adjusting the angle of the seat back, An operation to adjust the length of the seat cushion in the front-rear direction is required. For this reason, the operation of adjusting the longitudinal length of the seat cushion becomes troublesome.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle seat device that can adjust the length of the seat cushion in the front-rear direction suitable for the physique of a seated person without requiring troublesome operations.

According to a first aspect of the present invention, there is provided a vehicle seat device including a seat cushion provided on a vehicle floor so as to be slidable in the front-rear direction, a seat length variable portion capable of changing the length of the seat cushion in the front-rear direction, and the seat cushion. And a seat length adjusting unit that adjusts the length of the seat cushion in the front-rear direction according to the slide displacement in the front-rear direction.
According to a second aspect of the present invention, there is provided a vehicular seat device in which the front portion of the seat cushion is displaceable forward as a seat length variable portion from a main body portion forming the main body of the seat cushion. As described above, the front portion of the seat cushion is displaced forward from the main body portion in accordance with the sliding displacement of the seat cushion in the backward direction.

In the vehicle seat device according to the third aspect of the present invention, the seat length adjusting portion is a link mechanism.
In the vehicle seat device according to a fourth aspect of the present invention, the link mechanism is disposed along the front-rear direction of the seat cushion, one end is disposed at the front portion of the seat cushion, and the other end is the body portion of the seat cushion. A link rod that is rotatably supported by the main body portion, and a body portion of the seat cushion that is provided in the front-rear direction of the seat cushion, receives the other end of the link rod, The first rail member that pivots about the middle part according to the sliding displacement of the seat cushion, and the front part of the seat cushion, which is provided in the left-right direction of the seat cushion, receives one end of the link rod, and rotates the link rod According to the dynamic displacement, the front portion of the seat cushion has a second rail member that displaces the front portion of the seat cushion in the direction opposite to the sliding direction of the seat cushion.

  In the vehicle seat device according to the fifth aspect of the present invention, the seat length adjustment unit includes a fine adjustment unit that can adjust the amount of displacement of the front portion of the seat cushion per sliding amount of the seat cushion.

According to the first aspect of the present invention, when the seat cushion is slid in the front-rear direction to match the physique of the seated person, the length in the front-rear direction of the seat cushion changes according to the sliding displacement. That is, the longitudinal length of the seat cushion is adjusted in conjunction with the slide displacement.
That is, the slide displacement of the seat cushion is related to the length of the lower limb of the seated person, specifically, the distance from the back of the knee to the buttocks. The length of the seat cushion in the front-rear direction is related to the length of the seat that supports from the back of the knee to the buttocks, so if the seat cushion is slid forward or backward in the vehicle according to the seated person's physique, The seat cushion seat length is automatically determined in accordance with the seated person's physique. In other words, a seating surface suitable for supporting from the back of the knee of the seated person to the buttocks, which is an important requirement for ensuring good sitting comfort, can be obtained regardless of the size of the seated person.

Therefore, as long as the seat cushion is slid in the front-rear direction according to the physique of the seated person, it is possible to adjust the length of the seat cushion in the front-rear direction, which is suitable for the physique of the seated person, without requiring troublesome operations. it can.
According to the invention of claim 2, the front portion of the seat cushion is gradually displaced forward as the seat cushion is slid in the backward direction. Thereby, the seating surface length suitable for a seated person's physique is ensured easily.

According to the invention of claim 3, a mechanical structure with less cost burden is sufficient.
According to the invention of claim 4, it is possible to easily displace the longitudinal length of the seat cushion in accordance with the sliding displacement of the seat cushion by using a link mechanism that only combines the link rod and the pair of rail members. it can.
According to the invention of claim 5, the seat surface length can be adjusted satisfactorily for a seated person of any physique by fine adjustment.

The perspective view which shows the sheet | seat apparatus which concerns on the 1st Embodiment of this invention. The perspective view which shows the external appearance of the principal part of the sheet apparatus. The arrow view seen from the arrow A in FIG. The top view which shows when a seat cushion exists in the front. The top view which shows when the seat cushion is slid and displaced backward. The perspective view which shows the principal part of the 2nd Embodiment of this invention. The top view which shows the principal part of the 3rd Embodiment of this invention. The top view which shows when a seat cushion is made to slide-displace back.

Hereinafter, the present invention will be described based on a first embodiment shown in FIGS.
FIG. 1 shows the appearance of the sheet apparatus, and FIG. 2 shows each part of the sheet apparatus. In the figure, reference numeral 1 denotes a floor of an automobile (vehicle), and reference numeral 2 denotes a seat device installed on the floor 1.
The sheet device 2 has a sheet 3. Specifically, the seat 3 includes a seat cushion 5 on which a seated person such as a driver sits, and a seat back 7 that forms a backrest of the seat cushion 5. And as FIG. 2 shows, each bracket part 9 provided in the both sides of the left-right (vehicle width) direction of the lower part of the seat cushion 5 is each of the floor 1 via a pair of seat slide rail member 11 extended in a vehicle front-back direction. It is installed on the upper surface and supports the seat 3 so as to be slidable in the front-rear direction. Of course, the seat position of the seat 3 is adjusted in a section from the foremost part to the rearmost part of the seat slide rail member 11 by a lock operation or unlock operation by an operation tool (not shown) such as an operation lever. .

The seat cushion 5 includes a seat length variable portion that can change the length of the seat cushion 5 in the front-rear direction, such as the seat expansion / contraction mechanism 13, and a seat length adjustment portion that adjusts the length of the seat cushion 5 in the front-rear direction. A sheet length adjusting mechanism 20 having a mechanical structure is provided.
As shown in FIG. 1, the seat expansion / contraction mechanism 13 is divided into a seat cushion 5, for example, a front portion 5 a disposed on the back of a seated person's knee and a main body portion 5 b that forms the main body of the other seat cushion 5. Structure is used. The front portion 5a is slidably supported on the front end portion of the main body portion 5b by, for example, a pair of guide rail members 17 provided on both the left and right sides, and the front portion 5a is positioned from the position adjacent to the main body portion 5b. It can be displaced in the section up to the front position. That is, when the front portion 5a is separated from or close to the main body portion 5b, the length in the front-rear direction of the seat cushion 5 expands and contracts. Other stretchable structures may be used. An eaves portion 5c is formed on the uppermost portion of the main body portion 5b so as to cover a gap formed at the boundary between the front portion 5a and the main body portion 5b (FIG. 3).

Incidentally, the fixed side rail member 11a constituting the seat slide rail member 11 is fixed to the floor 1, and the movable side rail member 11b is also fixed to the main body portion 5b.
The seat length adjusting mechanism 20 is, for example, a link mechanism directly below the seat cushion 5 as shown in FIGS. 2, 3 (viewed from the arrow A in FIG. 2) and FIG. 4 (plan view of FIG. 2). 22 is provided. The link mechanism 22 is provided with line symmetry on the left and right sides of the seat cushion 5, for example. Each of the link mechanisms 22 includes a link rod 24 extending from the front portion 5a of the seat cushion 5 to the rear portion of the main body portion 5b and extending along the front-rear direction of the seat cushion 5, for example, a fixed rail member 11a (non-moving member). ) Fixed cushion movable rail member 26 (corresponding to the first rail member of the present application) and a cushion movable rail member 28 (corresponding to the second rail member of the present application) provided at the lower portion of the front portion 5a. Used. Here, the cushion movable rail member 26 is installed on a support plate 29 projecting inward from the fixed-side rail member 11a.

As shown in FIGS. 2 to 4, the link rod 24 is formed of, for example, a belt-shaped member. The cushion movable rail member 26 is formed of, for example, a groove-shaped member whose opening is directed upward. The cushion movable rail member 28 is formed of, for example, a groove-shaped member whose opening is directed downward.
Further, an intermediate portion of each link rod 24, here, a point closer to the front, is rotatably supported by the lower portion of the main body portion 5b via the pin member 30, and the entire link rod 24 is left and right with the pin member 30 as a fulcrum. Displaceable in the direction. Further, a guide roller 35a is rotatably supported in a sideways posture under the end portion of each link rod 24 on the rear side of the sheet, and a guide roller 35b is rotatably supported in a sideways posture on the end portion on the front side of the sheet. Has been.

  The cushion movable rail members 26 disposed on both sides of the main body portion 5 b are all provided in the front-rear direction of the seat cushion 5. For example, it is provided so as to be inclined in an oblique direction with respect to the front-rear direction. Here, the cushion movable rail member 26 is inclined in a narrowing direction toward the rear side of the seat cushion 5 (FIGS. 2 and 4). The cushion movable rail members 28 arranged on both sides of the front portion 5a are all provided in the left-right direction. For example, it is tilted in a direction oblique to the left-right direction. Here, the cushion movable rail member 28 is inclined in such a direction that the end portion on the outer side in the width direction is retracted rearward from the end portion on the inner side (FIGS. 2 and 4).

A guide roller 35a of the link rod 24 is movably fitted in each cushion movable rail member 26. As a result, the guide roller 35a forming the other end of the link rod 24 is received in a displaceable manner. Thereby, each link rod 24 is rotationally displaced about the pin member 30 as a fulcrum as the seat cushion 5 is slid.
Further, a guide roller 35b of the link rod 24 is movably fitted into each cushion movable rail member 28. Thus, the guide roller 35b forming one end of the link rod 24 is received so as to be displaceable. As a result, the front portion 5a of the seat cushion 5 is displaced to the side opposite to the direction in which the seat cushion 5 slides, in accordance with each link rod 24 that rotates. That is, the front portion 5a is pushed out of the main body portion 5b by the link rod 24 as the seat cushion 5 slides and moves in the backward direction. That is, the front portion 5a is displaced forward. More specifically, for example, the seat cushion 5 is set in a state where the front portion 5a and the main body portion 5b are adjacent to each other in advance when the seat cushion 5 is in a predetermined position in front of the small seated person. When the seat cushion 5 is slid rearward, the front portion 5a is pushed forward from the main body portion 5b by the link rod 24 that is rotationally displaced. That is, the longitudinal length of the seat cushion 5 is automatically adjusted in conjunction with the sliding movement of the seat cushion 5. Thereby, the seat surface of the seat cushion 5 is adjusted to the seat surface length suitable for a seated person's physique.

Referring to FIG. 4 and FIG. 5, the point that the seating surface length of the seat cushion 5 is automatically adjusted will be described. FIG. 4 shows a state when, for example, the seat 3 is in the foremost part. .
At this time, the guide roller 35 a is disposed at the foremost portion of the cushion movable rail member 26, and the guide roller 35 b is disposed at the innermost position of the cushion movable rail member 28.

From this state, in order to obtain a good driving posture for a large seated person, the seat position is shifted backward in accordance with the seated person's physique as indicated by an arrow α in FIG. This operation is performed by sliding the seat 3 rearward by operating the operation lever or the like and adjusting the seat position to a position that matches the physique of the seated person.
The sheet length adjusting mechanism 20 operates in conjunction with the adjustment operation of the seat position.

  That is, the guide roller 35a at the rear end portion of the link rod 24 is displaced rearward from the frontmost portion of the cushion movable rail member 26 as it is adjusted rearward of the seat position. At this time, the cushion movable rail member 26 is inclined inward. Therefore, as the guide roller 35a moves to the rear side of the cushion movable rail member 26 at the rear end of the link rod 24, a force is applied inward as shown by the arrows in FIGS. The collar 24 is rotationally displaced about the pin member 30 as a fulcrum.

  In accordance with the rotational displacement of the link rod 24, the guide roller 35 b at the front end of the link rod 24 is displaced outward from the innermost position of the cushion movable rail member 28. At this time, the cushion movable rail member 28 is inclined rearward. Therefore, as shown in FIG. 5, the front part 5a receives the rotational displacement of the link rod 24 and is gradually pushed forward from a position adjacent to the main body part 5b. Δ in FIG. 5 indicates the amount of extrusion of the front portion 5a (change in sheet length). Thereby, the front-back direction length of the seat cushion 5 is extended according to a seated person's physique.

Of course, if the seated person is a small physique, the front part 5a is displaced in the direction approaching the main body part 5b in response to the sliding displacement of the seat cushion 5 in the backward direction, and the length of the seat cushion 5 is automatically increased. It shrinks.
Thereby, the length of the seat cushion 5 in the front-rear direction is automatically adjusted. Of course, even if the cushion movable rail members 26 and 28 are inclined in opposite directions as indicated by the two-dot chain lines in FIGS. 4 and 5, the longitudinal length of the seat cushion 5 can be adjusted.

  Here, the slide displacement of the seat cushion 5 is related to the length of the lower limb of the seated person, specifically, the distance from the back of the knee to the buttocks. The length of the seat cushion 5 in the front-rear direction is related to the length of the seat surface that supports the back of the knee to the buttocks. Therefore, as described above, the length of the seat cushion 5 is automatically set to the seat cushion 5 simply by sliding the seat cushion 5 forward or rearward in accordance with the seated person's body size. It is adjusted according to the person's physique.

In other words, a seating surface suitable for supporting the seated person from the back of the knee to the buttocks can be obtained regardless of the seated person's physique, and good sitting comfort can be secured.
Therefore, as long as the seat cushion 5 is slid in the front-rear direction in accordance with the physique of the seated person, the length of the seat cushion 5 is adjusted to the length in the front-back direction, which is suitable for the physique of the seated person, without requiring troublesome operations. Can do.

In particular, if the front part 5a (seat cushion 5) receiving the back of the seated person's knee is made extendable and the front part 5a is displaced in accordance with the sliding displacement of the seat cushion 5, the seated person's physique is easily achieved. It is possible to secure a seating surface length suitable for.
Moreover, the structure for adjusting the seating surface length using the link mechanism 22 is simple. In particular, when the link rod 24 and the cushion movable rail members 26 and 28 are used, a pivot fulcrum is formed on the link rod 24, the cushion movable rail members 26 and 28 are inclined, or the link movable rod members 26 and 28 are used to link the link rod 24. A simple mechanical structure with a low cost burden, such as receiving 24 ends, is sufficient.

FIG. 6 shows a second embodiment of the present application.
In the present embodiment, a fine adjustment unit 40 that can adjust the amount of displacement of the front portion 5a per slide amount of the seat cushion 5 is further provided. FIG. 6 shows the structure of the fine adjustment unit 40.
For example, the fine adjustment unit 40 includes a pair of cushion movable rail members 48 that rotatably support inner end portions and a posture angle displacement mechanism 50 that displaces the posture angle of the rail members 48. The posture angle displacement mechanism 50 includes a connecting rod 52 that rotatably connects the outer ends of the cushion movable rail member 48, for example, an operation tool that is rotatably installed on the front surface of the front portion 5a, for example, a dial. A structure in which a transmission mechanism 56 that displaces the connecting rod 52 in the vehicle front-rear direction by the rotational displacement of the member 54 and the dial member 54 is used. Further, the transmission mechanism 56 includes a screw mechanism in which a screw shaft 56a extending from the center portion of the dial member 54 toward the connecting rod 52 and a nut portion 58 that receives the screw shaft 56a provided on the connecting rod 52 so as to be screwed therein are combined. Used. Accordingly, when the dial member 54 is rotated, the connecting rod 52 is displaced in the front-rear direction by the action of a screw. Then, the inclination of each cushion movable rail member 48 changes, and the displacement amount of the front portion 5a per slide amount of the seat cushion 5 is adjusted.

With this structure, the displacement of the front portion 5a can be adjusted by a fine adjustment operation performed by the dial member 54, so that the seating surface length can be adjusted satisfactorily for a seated person of any physique. Of course, the fine adjustment unit 40 may have another structure.
7 and 8 show a third embodiment of the present invention.
In the first embodiment, a pair of link rods 24 are not arranged in parallel on both sides of the seat cushion 5 in the width direction, but the pair of link rods 24 are combined in an X shape centering on a central pivot point. The link mechanism 60 is used. Even if it does in this way, there exists an effect similar to 1st Embodiment. You may combine the fine adjustment part 40 of 2nd Embodiment with the same embodiment.

However, in FIGS. 6-8, the same code | symbol was attached | subjected to the same part as 1st Embodiment mentioned above, and the description was abbreviate | omitted.
The present invention is not limited to the first to third embodiments described above, and may be implemented in various ways without departing from the gist of the present invention. For example, in the above-described embodiment, an example in which the longitudinal length of the sea cushion is adjusted according to the slide displacement of the seat cushion with a mechanical structure using various link mechanisms has been described. The length of the seat cushion in the front-rear direction may be adjusted according to the sliding displacement of the seat cushion using the mechanical structure described above or the electrical structure using a sensor or a motor.

1 Floor 5 Seat cushion 13 Seat expansion / contraction mechanism (Seat length variable part)
20 Seat length adjustment mechanism (Seat length adjustment part)
22 Link mechanism 40 Fine adjustment section

Claims (5)

A seat cushion provided on the floor of the vehicle so as to be slidable in the longitudinal direction of the vehicle;
A seat length variable portion capable of changing the longitudinal length of the seat cushion;
A vehicle seat device, comprising: a seat length adjusting unit that adjusts a length of the seat cushion in the front-rear direction according to a slide displacement in the front-rear direction of the seat cushion. The seat length variable portion is configured to displace a front portion of the seat cushion forward from a main body portion that forms a main body of the seat cushion.
2. The vehicle according to claim 1, wherein the seat length adjusting unit is configured to displace a front portion of the seat cushion forward from the main body portion in accordance with a slide displacement in a backward direction of the seat cushion. Sheet device.   The vehicle seat device according to claim 2, wherein the seat length adjustment unit is a link mechanism. The link mechanism is disposed along the front-rear direction of the seat cushion, one end portion is disposed at the front portion of the seat cushion, the other end portion is disposed at a body portion of the seat cushion, and an intermediate portion is disposed at the body portion. A link rod supported rotatably,
The seat cushion is provided on the body cushion in the front-rear direction of the seat cushion, receives the other end portion of the link rod, and rotates the link portion with the intermediate portion as a fulcrum according to the slide displacement of the seat cushion. One rail member;
A front portion of the seat cushion, provided in a left-right direction of the seat cushion, receiving one end portion of the link rod, and sliding the front portion of the seat cushion according to the rotational displacement of the link rod; The vehicle seat device according to claim 3, further comprising a second rail member that is displaced to the opposite side.   5. The seat length adjustment unit according to claim 1, further comprising a fine adjustment unit configured to adjust a displacement amount of a front portion of the seat cushion per sliding amount of the seat cushion. The vehicle seat device described in 1.

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