JP2004224094A - Link mechanism with damper and vehicular seat incorporated with it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a link mechanism with a damper with small torque and smooth movement, and a vehicular seat incorporated with it. <P>SOLUTION: This link mechanism with the damper is a restricted link mechanism constituted by N pieces of nods having a fixed link, and a rotary damper 10 is attached on at least one of the interlocking bars. The link mechanism with the damper is the vehicular seat constituted by a seat cushion 1 and a seat back 2 and installed to a storing seat wherein the seat back 2 is folded to the seat cushion 1 side in order to be stored. The damper is used in a predetermined position, and the link mechanism with the damper is achieved whereby the movement is smooth, a feeling of quality is given, the device is compacted, and miniaturized and the weight is reduced. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a link mechanism with a damper having a small torque and a smooth movement, and a vehicle seat incorporating the same.
[0002]
[Prior art]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2000-85433
For example, as an automobile seat or the like including a seat cushion and a seat back, a retractable type in which the seat back is folded toward the seat cushion and can be stored is known. In this case, the seat cushion and the seat back are generally connected by a link mechanism so as to make a predetermined movement. Further, as disclosed in Patent Literature 1, there is also known a configuration in which a damper is provided on a connecting shaft of a reclining mechanism for the purpose of preventing torsional deformation due to a rotation operation of a seat back.
[0004]
On the other hand, in the retractable seat, when the seat is folded and stored or when the seat is returned to the original position, a phenomenon occurs in which the seat back moves vigorously and makes a loud noise. As a result, there has been a problem that the movement of the seat back is coarse and the generated sound is loud, and the sense of quality is lacking. Therefore, the development of a new link mechanism and a retractable vehicle seat that can make the movement of the seat back smooth and give a sense of quality, and that does not violate miniaturization with a compact device has been desired. .
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides a link mechanism with a damper, which can move smoothly and give a sense of quality, and can be reduced in size and weight with a compact device, and incorporating the same. It has been completed for the purpose of providing a vehicle seat.
[0006]
[Means for Solving the Problems]
The present invention has been made to solve the above-mentioned problem, and is a limited link mechanism including N nodes having fixed links, wherein a rotary damper is attached to at least one of the moving nodes. And a link mechanism with a damper and a link mechanism with a damper comprising a seat cushion and a seat back, wherein the seat back is folded into the seat cushion side and incorporated in a retractable seat capable of being stored.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view showing the movement of a link mechanism according to the present invention. In the illustrated example, a limited link mechanism around links L1 to L4 and assembled by four nodes A to D is shown as an example. Further, among the links, the link L1 is in a fixed state. At least one of the moving nodes has a structure in which a rotary damper 10 is attached. In the drawing, a rotary damper is attached to the node C.
[0008]
The rotary damper 10 is provided for the purpose of smoothing the movement of the link mechanism, and when the seat back is folded and stored or when the seat is returned to the original position, the seat back moves vigorously, and This is to prevent a loud noise.
In this case, the rotary damper 10 can be installed at any of the nodes A to D. However, as a result of repeating the various tests, the present inventor has found that providing the rotary damper 10 on a moving node such as the nodes C and D rather than providing the rotary damper 10 on a fixed node such as the nodes A and B has a higher rotational torque. Accordingly, the present invention has been made based on a technical idea that the size and weight of the damper 10 can be reduced by attaching a rotary damper to at least one of the moving nodes.
In addition, the rotary damper 10 can be provided in each of the nodes C and D. However, if at least one is provided, the torque can be sufficiently reduced. It is attached.
Also, in the illustrated one, the limited link mechanism of section 4 has been described, but it is needless to say that N may be 5 or more.
[0009]
Next, a vehicle seat in which the above-described link mechanism with a damper is incorporated in a retractable seat will be described.
2 to 4 show an automobile seat, in which 1 is a seat cushion, 2 is a seat back, and the seat back 2 has a structure in which the seat back 2 is folded toward the seat cushion 1 and can be stored. ing.
More specifically, the seat back 2 is pivotally attached to the joint A so as to be pivotable, while the seat cushion 1 is pivotally attached to the seat back 2 at the rear end thereof with the joint D. At the same time, the front end is pivotally connected to the link C of the link L2. Node B is a pivot point of the link L2 with the floor side.
[0010]
When this is matched with the link mechanism, the link L1 is a straight line connecting the nodes A and B, the link L2 is a straight line connecting the nodes B and C, the link L3 is a straight line connecting the nodes C and D, and the link L4. Is a straight line connecting nodes D and A. The nodes A and B are the rotation centers fixed to the seat frame bracket 3, and the nodes C and D are the rotation centers that move with the rotation of the link. The rotary damper 10 is attached to the node C that rotates.
[0011]
FIG. 4 shows a cross section of a main part of a mounting portion of the rotary damper 10. In FIG. 4, reference numeral 1a denotes a cushion frame, 4 denotes a link assembly. It is pivotally mounted. A positioning projection 5a is formed on the head of the bolt 5, and the projection 5a is set at the center of the rotary damper 10 so as to obtain the reaction force of the damper. Reference numeral 7 denotes a bolt for fixing the rotary damper 10 to the cushion frame 1a.
[0012]
As shown in FIGS. 2 and 3, such a vehicle seat can take two modes, a normal state used as a seat, and a state where the seat back 2 is folded and stored toward the seat cushion 1. However, the structure incorporates a link mechanism with a damper, so that a smooth operation of the seat back 2 can be realized, and the sense of quality is rich. In addition, since the rotary damper 10 is mounted on the node C that rotates, the rotational torque of the damper can be reduced, and the size and weight of the damper used can be reduced.
[0013]
Incidentally, the results of measuring the required reaction force (torque) of the damper when the rotary damper 10 was attached to any of the nodes A, B, C, and D were A (30 N · m) and B (30 N · m). ), C (18 N · m) and D (22 N · m), and it was confirmed that the torque of the damper was reduced when the damper was attached to the node that rotated.
This is because, for example, when a rotary damper with a torque of 15 Nm is used, the link does not operate smoothly unless two are used at the nodes A and B, but one is used at the nodes C and D. In other words, it can be understood that a smaller damper can be smoothly folded and stored.
[0014]
【The invention's effect】
As is apparent from the above description, the present invention provides a link mechanism with a damper that can achieve smoothness and a luxurious feeling by using a damper at a specific position, and can be reduced in size and weight with a compact device. Can be provided. Further, the vehicle seat incorporating the link mechanism with the damper has a smooth movement during the seat back folding operation, has a sense of quality, and can exhibit excellent operability.
Therefore, the present invention greatly contributes to industrial development as a vehicle seat incorporating a damper-equipped link mechanism that eliminates the conventional problems.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing movement of a link mechanism according to a first invention.
FIG. 2 is a front view showing an embodiment of the second invention.
FIG. 3 is a front view showing an embodiment of the second invention.
FIG. 4 is a cross-sectional view of a main part showing a mounting portion of a rotary damper.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Seat cushion 2 Seat bag 10 Rotary damper A Section B Section C Section D Section L1 Link L2 Link L3 Link L4 Link

Claims (2)

A limited link mechanism comprising N nodes having fixed links, wherein a rotary damper is attached to at least one of the moving nodes. A vehicle seat, comprising the link mechanism with a damper according to claim 1, wherein the link mechanism includes a seat cushion and a seat back, and the seat back is folded toward the seat cushion and can be stored.

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