JP2008018866A - Fold-down seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fold-down seat capable of preventing any interference of a rear link with the buttocks when a person is seated, and allowing the rear link to be hardly seen, without the need for forming any recess to prevent interference with a seatback. <P>SOLUTION: The fold-down seat 1 is operated so that a seat cushion 2 is moved forward and sunken downwardly when a seatback 3 is folded forwardly. The fold-down seat comprises a front link 6 with both ends thereof being turnably connected to a forward portion of the seat cushion 2 and a base frame 4 or a vehicle body frame, and a rear link 7 with both ends thereof being turnably connected to a rear portion of the seat cushion 2 and a lower portion of the seatback 3. The rear link 7 is formed in a shape in which an intermediate portion thereof extends downwardly from a lower end of the seatback 3, and the intermediate portion thereof is turnably supported by the base frame 4 or the vehicle body frame. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fold-down seat used for a rear seat of an automobile.

  The fold down seat is used for a rear seat in an automobile. In this fold-down seat, when the seat back is moved forward, the seat cushion moves forward and simultaneously operates to sink downward. By performing such an operation, the space above the folded seat back can be used as a space for storing luggage.

  FIG. 3 shows a conventionally used fold-down seat. A rear seat is formed by the seat cushion 100 and the seat back 110, and the rear seat is supported on a base frame 120 fixed on the vehicle body floor. The seat back 110 is rotatably supported at its lower end by a shaft body 130 provided on the base frame 120.

  The fold down seat shown in FIG. 3 is provided with a front link 140 and a rear link 150 in order to perform forward movement and sinking of the seat cushion 100 by the above-described forward tilting of the seat back 110. The front link 140 is disposed at a front portion of the seat cushion 100, and an upper portion thereof is pivotally supported by the seat cushion 100 and a lower portion thereof is pivotally supported by the base frame 120. The rear link 150 is disposed at a rear portion of the seat cushion 100, and an upper portion is pivotally supported on the lower portion of the seat back 110 and a lower portion is pivotally supported on the base frame 120. Reference numeral 141 denotes an upper shaft support portion of the front link 140, 142 denotes a lower shaft support portion of the link 140, and 151 denotes an upper shaft support portion of the rear link 150. In addition, the lower shaft support portion of the rear link 150 is omitted.

  The rear link 150 is formed by a single plate, and is exposed so as to cover the boundary portion between the seat back 110 and the seat cushion 100 in a state along the side surface of the seat back 110 and the side surface of the seat cushion 100. That is, the rear link 150 extends from the side surface of the seat back 110 so as to cover the rear side of the seating portion of the seat cushion 100 and then extends downward along the side surface of the seat cushion 100.

In such a structure, when the seat back 110 is tilted forward, the rear link 150 and the front link 140 are rotated, so that the seat cushion 100 can be operated to move forward and sink downward.
JP-A-5-254368

  In the conventional structure shown in FIG. 3, since the rear link 150 is higher than the rear side of the seating portion of the seat cushion 100, the rear link 150 interferes with the seated person's buttocks when seated on the seat, It has a problem that makes it uncomfortable. Moreover, since the rear link 150 is easy to see, it has an adverse effect on appearance. Furthermore, since the rear link 150 interferes with the side surface of the seat back 110 when it rotates, it is necessary to form a recess for the rotation of the rear link 150 on the side surface of the seat back 110. It also has troublesome problems.

  The present invention has been made in consideration of such problems, and the appearance of the rear link can be improved by making the rear link not interfere with the buttocks and difficult to see when seated. An object of the present invention is to provide a fold-down seat that does not require the formation of a recess for preventing interference with the seat back.

  In order to achieve the above object, according to a first aspect of the present invention, when the seat back is moved forward, the seat cushion moves forward and sinks downward. A front link rotatably connected to the front part and the base frame or the vehicle body frame, and a rear link having both ends rotatably connected to the rear part of the seat cushion and the lower part of the seat back The rear link is formed such that an intermediate portion extends downward from the lower end of the seat back, and the intermediate portion is rotatably supported by a base frame or a vehicle body frame.

  The invention according to claim 2 is the fold-down seat according to claim 1, wherein the rear link has a first link having one end rotatably connected to a rear portion of the seat cushion, and one end being a lower end of the seat back. A second link rotatably connected to the portion, and the other ends of these links are connected to each other so as to be rotatable with each other extending downward from the lower end of the seat back. Any one of the link and the second link is rotatably supported by the base frame or the body frame.

  A third aspect of the present invention is the fold-down seat according to the second aspect, wherein the first link and the second link are connected so that the entire rear link is U-shaped or V-shaped. It is characterized by.

  According to the present invention, since the middle portion of the rear link extends below the lower end of the seatback, the entire rear link is disposed at a position lower than the seating portion of the seat cushion. For this reason, not only does not interfere with the buttocks at the time of sitting, it is difficult to see, so the appearance is improved. An intermediate portion extending downward is rotatably supported by the base frame or the vehicle body frame, and the rear link rotates around the intermediate portion extending downward when operating as a fold down seat. For this reason, the rear link does not interfere with the seat back, it is not necessary to form a recess for preventing the interference in the seat back, and the processing of the seat back is simplified.

  1 and 2 show a fold-down seat 1 according to an embodiment of the present invention. FIG. 1 is a side view before operation, and FIG. 2 is a side view after operation.

  The fold-down seat 1 is used for a rear seat of an automobile, and includes a seat cushion 2 and a seat back 3 disposed at the rear portion of the seat cushion 2. The fold-down seat 1 is used while being supported by a base frame 4 on the vehicle body floor. In this case, the lower end portion of the seat back 3 is rotatably attached to a shaft body 5 provided at the rear upper end portion of the base frame 4, whereby the seat back 3 can be moved forward.

  The base frame 4 extends in the front-rear direction of the vehicle body, and supports the seat cushion 2 at its front portion and supports the seat back 3 at its rear portion. The seat cushion 2 is supported on the front portion of the base frame 4 via the front link 6, and a straight plate is used as the front link 6. The front link 6 has a shaft support portion 6 a rotatably connected to a lower portion of a front portion of the seat cushion 2, and a shaft support portion 6 b rotatably connected to a front portion of the base frame 4. Have. As the pivotal support portions 6a and 6b rotate, the seat cushion 2 moves forward and sinks downward at the same time.

  The seat back 3 is supported on the rear portion of the base frame 4 via the rear link 7. The rear link 7 supports the seat back 3 with respect to the base frame 4 and functions to connect the seat back 3 and the seat cushion 2. In this embodiment, the rear link 7 is the first link 8. And the second link 9 is connected.

  The first link 8 is disposed on the seat cushion 2 side, and one end (upper end) is rotatably connected to the rear portion of the seat cushion 2. Reference numeral 8a denotes this shaft support portion. The second link 9 is disposed on the seat back 3 side, and one end (upper end) is rotatably connected to the lower end portion of the seat back 3. Reference numeral 9a indicates this shaft support portion.

  The other end 8c of the first link 8 and the other end 9c of the second link 9 both extend downward from the shaft support portions 8a, 9a. More specifically, the other ends 8c and 9c of the first link 8 and the second link 9 extend below the lower end of the seat back 3, and the other end 8c of the first link 8 is the seat back. It is L-shaped bent to the 3 side. On the other hand, the other end 9c of the second link 9 extends linearly, and its extended end is rotatably connected to the extended end of the other end 8c of the first link 8. Reference numeral 10 denotes a shaft support portion in which the extended end portions of the other end 8c of the first link 8 and the other end 9c of the second link 9 are rotatably connected.

  Thus, the rear link 7 is formed by the first link 8 and the second link 9 by being pivotally connected to each other by the pivotal support portion 10. By connecting the other ends 8c and 9c of the first link 8 and the second link 8 in this way, the entire rear link 7 is U-shaped or V-shaped. In addition to the above, an intermediate portion between one end and the other end of the first link 8 is rotatably supported by the base frame 4, and reference numeral 11 is rotatably supported by the base frame 4. The support shaft is shown.

  Thus, the rear link 7 constituted by the first link 8 and the second link 9 is an intermediate portion thereof, that is, the other end 8c of the first link 8, the other end 9c of the second link 9, and a connecting portion thereof. Extends below the lower end portion of the seat back 3. Accordingly, the rear link 7 is disposed below the boundary portion between the seat cushion 2 and the seat back 3, and the entirety thereof is at a position lower than the seating portion of the seat cushion 2.

  Further, an intermediate portion of the rear link 7 (in this embodiment, the other end 8 c of the first link 8) is rotatably supported by the support shaft 11, whereby the rear link 7 is entirely relative to the base frame 4. Rotate. This rotation is performed in a state where the seat cushion 2 and the seat back 3 are connected.

  In the above structure, when the seat back 3 is moved forward from the state of FIG. 1, the rear link 7 rotates counterclockwise about the support shaft 11 and the front link 6 rotates in the same direction. In this case, since the shaft support portion 9a of the second link 9 is connected to the lower end portion of the seat back 3, the rear link 7 moves along the periphery of the shaft body 5 of the base frame 4 as shown in FIG. To do. Therefore, the second link 9 does not interfere with the seat back 3 when the second link 9 rotates.

  The seat cushion 2 moves forward due to the rotation of the rear link 7 and the front link 6 described above, and at the same time, the seat cushion 2 sinks downward to be in the state shown in FIG. In the state of FIG. 2, the seat back 3 is folded on the seat cushion 2, so that the upper space can be used as a luggage storage space.

  In such a structure, since the intermediate portion of the rear link 7 composed of the coupling body of the first link 8 and the second link 9 extends downward from the lower end of the seat back 3, the entire rear link 7 is seat cushion 2. It is arranged at a position lower than the seating portion. Therefore, not only does the rear link 7 not interfere with the buttocks when seated, it is difficult to see and the appearance is improved. Further, the intermediate portion extending downward is rotatably supported by the base frame 4, and the rear link 7 rotates around the intermediate portion extending downward when operating as a fold down seat. For this reason, the rear link 7 does not interfere with the seat back 3. Thereby, it is not necessary to form a recess for preventing interference in the seat back 3, and the processing of the seat back 3 is simplified.

  The present invention is not limited to the above embodiments, and various modifications can be made. For example, the support shaft 11 supports the first link 8 so as to be rotatable, but the second link 9 may be supported so as to be rotatable instead of the first link 8. Further, the front link 6 and the rear link 7 may be directly supported by the vehicle body frame (not shown) without being supported by the base frame 4.

It is a side view before the action | operation in one Embodiment of this invention. It is a side view after the action | operation of one Embodiment. It is a side view of the conventional fold down seat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fold down seat 2 Seat cushion 3 Seat back 4 Base frame 5 Shaft body 6 Front link 7 Rear link 8 1st link 9 2nd link

Claims (3)

When the seat back is moved forward, the seat cushion moves forward and folds down so as to sink downward.
Both ends are rotatably connected to the front portion of the seat cushion and the base frame or the vehicle body frame, and both ends are rotatably connected to the rear portion of the seat cushion and the lower portion of the seat back. The rear link is formed in a shape in which the intermediate portion extends below the lower end of the seat back, and the intermediate portion is rotatably supported by the base frame or the vehicle body frame. Fold down seat characterized by that.   The rear link includes a first link whose one end is rotatably connected to a rear portion of the seat cushion, and a second link whose one end is rotatably connected to a lower end portion of the seat back. The other ends of the first and second links are pivotally connected to each other with the other ends extending below the lower end of the seat back, and either the first link or the second link is rotated to the base frame or the body frame. The fold down seat according to claim 1, wherein the fold down seat is supported.   The fold-down seat according to claim 2, wherein the first link and the second link are connected to form an entire U-shaped or V-shaped rear link.

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