JP2006167322A - Both sides reclining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a both sides reclining device, which connects both reclining organizations provided in each right/left side of a seat with a coupling shaft, and prevents the lock by the reclining organization from being released by external force input into the coupling shaft. <P>SOLUTION: The centroid (a) of a center section 10 into which external force is input in a coupling shaft 1 is formed lower or higher than the centroid (b) of both ends 11, 11 of the coupling shaft 1, and rotation of the coupling shaft by the outer force is regulated in the locking orientation by reclining organizations 2, 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a reclining device for an automobile seat, more specifically, a reclining mechanism is provided on both the left and right sides of a seat, both the reclining mechanisms are connected by a connecting shaft, and the movement of one reclining mechanism is transmitted to the other reclining mechanism. The present invention relates to a reclining device.

  In this type of conventional product, the seat occupant moves rearward at the time of a rear collision, and the positional relationship between the seat occupant's hip point and the connecting shaft, or the seat surface angle of the seat, the hardness of the foam pad constituting the seat Due to complex factors such as collision speed, vehicle rigidity, seated person's physique, etc., the seated person's waist and the like push the upper part of the connecting shaft backward.

  Thereby, there is a possibility that the connecting shaft rotates and the locks by the reclining mechanisms on both sides are released.

Therefore, various measures have been taken in order to solve such problems.
For example, as disclosed in Japanese Patent Application Laid-Open No. 2000-201767, the connecting shaft is formed in a crank shape so that a load at the time of rear collision applied to the front surface of the seat does not act on the connecting shaft.

JP 2000-201767 A

  However, for example, the crank-shaped connecting shaft is provided with a space for rotating the connecting shaft inside the seat, or because the connecting shaft protrudes rearward, it corresponds to an external force input from the rear side of the seat. It is necessary to provide a protective member.

  Therefore, there is a possibility that the structure and the like inside the seat become complicated.

  Accordingly, an object of the present invention is to simplify the structure and eliminate the problems of the conventional products.

  In order to achieve the above object, a double-sided reclining device according to the present invention is provided with a reclining mechanism on both the left and right sides of a seat, the two reclining mechanisms are connected by a connecting shaft, and the movement of one reclining mechanism is controlled by the other reclining mechanism. A double-sided reclining device for transmitting to a mechanism, wherein the center of gravity of the connecting shaft that receives an external force due to the rearward movement of an occupant is formed lower than both ends of the connecting shaft, and the locking rotation of each reclining mechanism The direction is the same as the direction when the central portion is rotated by an external force.

  The above reclining device restricts the connecting shaft to rotate in the locking direction by both reclining devices by the backward movement of the seated person at the time of rear collision.

  Further, the present invention is a double-sided reclining device in which reclining mechanisms are provided on both right and left sides of a seat, both the reclining mechanisms are connected by a connecting shaft, and the movement of one reclining mechanism is transmitted to the other reclining mechanism, When the center of gravity of the central portion that receives external force due to the forward movement of luggage or the like on the connecting shaft is formed higher than both ends of the connecting shaft, and when the central portion is rotated by the external force in the lock rotation direction of each reclining mechanism It is the structure which becomes the same as this direction.

  This mechanism has a luggage compartment behind the seat, and is used for a seat in which the luggage in the luggage compartment may move forward and hit the back of the seat when a vehicle collides.

  And the center part of the said connection shaft can adjust the position of the gravity center of a center part with respect to the both ends of a connection shaft by forming in a semicircle shape and a crescent-shaped cross-sectional shape.

  According to the first aspect of the present invention, when the vehicle collides backward, the seated person moves backward to push the connecting shaft. At that time, the central portion of the connecting shaft to which the external force of the seated person is applied is located at a position where the center of gravity is lower than both ends of the connecting shaft, so that the connecting shaft rotates in the same locking direction as the reclining devices on both sides. Therefore, the lock by the locking mechanism of the reclining mechanism on both sides is not released by the external force.

  Therefore, by processing only the connecting shaft, it is possible to prevent unlocking of the locking mechanisms of the reclining mechanisms on both sides due to the backward movement of the seated person.

According to the second aspect of the present invention, even when the connecting shaft is disposed on the back side of the seat, a load or the like moves forward in the event of a vehicle collision and an external force is input to the connecting shaft. The connecting shaft is rotated in the same direction as the locking direction by the locking mechanism of the reclining mechanism.
Therefore, the connecting shaft does not rotate in the unlocking direction due to an external force applied from the back side of the seat.

  According to the third aspect of the present invention, the connecting shaft is semicircular or crescent shaped by crushing the pipe with a press or the like, so the workability of the connecting shaft is also improved.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows an automobile seat having reclining mechanisms 2, 3 on both left and right sides of the seat, and both the reclining mechanisms 2, 3 are connected by a connecting shaft 1.

  The connecting shaft 1 is disposed below the seat back SB above the seat cushion SC, and is provided to transmit the movement of one reclining mechanism 3 to the other reclining mechanism 2.

  One of the above reclining mechanisms 3 is an outer side reclining mechanism 3, and an operation lever 4 is provided. By operating this operation lever 4, the outer side reclining mechanism 3 is unlocked and the other reclining mechanism 2 is configured to simultaneously release the lock of the inner side reclining mechanism 2 via the connecting shaft 1.

  Both of the above reclining mechanisms 3 are locked by rotating the gear in one direction and unlocked by rotating in the other direction. For example, Japanese Patent Laid-Open Nos. 7-213368 and 9-131239 are known. It is used for a double-sided reclining device such as a gazette.

  As shown in FIG. 2, the connecting shaft 1 is a pipe such as a square pipe or a round pipe, and is formed into a semicircular or crescent shape in cross section by crushing the central portion 10 with a press or the like except for both end portions 11 and 11 thereof. ing. 10A is a crushing part and 10B is an arcuate part.

  Therefore, as shown in FIGS. 3 and 4, the center of gravity A of the central portion 10 is located on the arcuate portion 10 </ b> A side with respect to the center of gravity of both end portions 11.

  As shown in FIGS. 2 and 3, the connecting shaft 1 with the crushing portion 10A of the center portion 10 facing upward and the center of gravity A of the center portion 10A being lower than the center of gravity of the both end portions 11 and 11 is This structure copes with the backward movement of the seated person at the time of collision.

That is, as shown in FIG. 3, when an external force due to the backward movement of the seated person is input to the central portion 10 of the connecting shaft 1 in the B direction, the connecting shaft 1 is configured to rotate in the locking direction that is the A direction. Has been.
This lock direction is the rotation in the lock direction (lock gear meshing direction) of the lock gear constituting the lock mechanism of each reclining mechanism 2, 3.

  For this reason, the external force from the seat occupant acts in the direction of locking the seat back SB by the reclining mechanisms 2 and 3 to the seat cushion SC. Therefore, both external forces input to the connecting shaft 1 from the seat occupant during a rearward collision of the vehicle. The reclining mechanisms 2 and 3 are not unlocked.

  Further, when there is a possibility that an external force due to a collision from the back of the seat (seat back) to the back of the seat back SB of the load is input to the connecting shaft 1 such as in front of the loading platform, the center portion 10 is crushed. The center of gravity of the central portion 10 with the portion 10A facing downward is disposed so as to be higher than the gravity centers of the end portions 11, 11.

  In this case, the external force input to the connecting shaft 1 is a force that rotates the connecting shaft counterclockwise as shown in FIG. The lock gears constituting both the reclining mechanisms 2 and 3 are configured to be locked by rotating counterclockwise and to be unlocked by rotating clockwise. Then, since the center of gravity of the central portion 10 of the connecting shaft 1 that receives the external force is at a position higher than the center of gravity of both end portions 11, 11, the external force rotates the connecting shaft 1 in the locking direction by the lock gear.

  Thereby, since the connection shaft 1 rotates in the locking direction by an external force from the back surface of the seat back SB, there is no possibility of being unlocked.

It is the schematic of the both-side reclining apparatus which concerns on this invention. It is a perspective view of the connection shaft used for this invention. It is the III-III sectional view taken on the line of FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Connection shaft, 2, 3 ... Reclining mechanism, 10 ... Center part of connection shaft 11, 11 ... Both ends of connection shaft, A ... Center of gravity position of center part, B ... Center of gravity position of both ends

Claims (3)

A reclining mechanism is provided on both the left and right sides of the seat, the both reclining mechanisms are connected by a connecting shaft, and the reclining mechanism transmits the movement of one reclining mechanism to the other reclining mechanism,
When the center of gravity of the central portion that receives external force due to the rearward movement of the occupant in the connection shaft is formed lower than both ends of the connection shaft, and the central portion is rotated by the external force in the lock rotation direction of each reclining mechanism Recliner on both sides that is the same as the direction of A reclining mechanism is provided on both the left and right sides of the seat, the both reclining mechanisms are connected by a connecting shaft, and the reclining mechanism transmits the movement of one reclining mechanism to the other reclining mechanism,
The center of gravity of the central portion that receives external force due to the forward movement of a load or the like on the connecting shaft is formed higher than both ends of the connecting shaft, and the central portion is rotated by the external force in the lock rotation direction of each reclining mechanism. A reclining device on both sides that is the same as the direction of the stroke.   The both-side reclining device according to claim 1, wherein a central portion of the connecting shaft is formed in a semicircular and crescent-shaped cross-sectional shape.

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