JPH11192134A - Both side reclining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect a connecting rod with four surfaces of a rotary shaft with dimensional accuracy by press, prevent generation of backlash and prevent generation of abnormal sound. SOLUTION: A rotary shaft 23 of a reclining device is formed on four surfaces. A tip part 31a of a connecting rod 31 is formed into a hollow shape into which the rotary shaft 23 is inserted. One end of the longitudinal direction of a fitting part 33 of the tip part 31a of the connecting rod 31 and the rotary shaft 23 is press-formed in a state that dimensional accuracy of left and right directions which is orthogonally crossed with the longitudinal direction of the fitting part 33 is determined and a first coupling part 33a is formed. The other end of the longitudinal direction of the fitting part 33 is press-formed in a state that dimensional accuracy of the vertical direction which is orthogonally crossed with the longitudinal direction of the fitting part 33 is determined and a second coupling part 33b is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided reclining device for tilting a seat back forward and backward with respect to a seat cushion, and more particularly to a base member fixed to a seat cushion and a base member pivotally mounted on the base member. A reclining device including at least a rotating arm movably supported and fixed to a seat back, and a rotating shaft inserted between the base member and the rotating arm is provided on both the outer side and the inner side of the seat cushion. The present invention relates to a double-sided reclining device in which a rotation axis of one reclining device and a rotation axis of the other reclining device are connected via a connecting rod.

[0002]

2. Description of the Related Art As a double-sided reclining device of this type, there has heretofore been disclosed Japanese Patent Application Laid-Open No. 9-2849, which was previously proposed by the present applicant.
Japanese Unexamined Patent Application Publication No. 6-206, and many other double-sided reclining devices have been proposed. In this conventional example, the inner cam member is engaged with the lock-off groove and the lock-on contact portion of the tooth inner at the time of lock-off and lock-on, and is fixed to the external teeth of the tooth inner and the seat back side. A double-sided reclining device is disclosed in which an arm engages and disengages with internal teeth and lock-off and lock-on are performed prior to the outer side.

As shown in FIGS. 4 (a) and 4 (b), a rotation shaft 1 of one reclining device and a rotation shaft 1 of the other reclining device (only one is shown) are connected via a connecting rod 3. In the two-sided reclining device, the rotating shaft 1 of the reclining device on one side is formed on four sides having a rectangular cross section, the end 3a of the connecting rod 3 is formed in a hollow shape, and the end 3a of the connecting rod 3 is rotated. It is inserted into the shaft 1 and integrated by press molding.

[0004]

However, in the above-mentioned conventional double-sided reclining device, the rotating shaft 1 of the reclining device has four faces, and the rotating shafts 1 of the pair of left and right reclining devices are connected by the connecting rod 3. However, the connecting rod 3 cannot be connected to the four surfaces of the rotating shaft 1 by pressing with high dimensional accuracy. If the dimensional accuracy of one of the two surfaces is increased, the other two surfaces are distorted due to one side,
It was difficult to increase the dimensional accuracy of the other two surfaces, and it was difficult to increase the dimensional accuracy of all four surfaces.

SUMMARY OF THE INVENTION An object of the present invention is to pay attention to the unsolved problems of the above-mentioned conventional example. The connecting rod can be connected to the four surfaces of the rotary shaft by pressing with good dimensional accuracy, and the occurrence of backlash is reduced. It is an object of the present invention to provide a double-sided reclining device capable of preventing occurrence of abnormal noise and preventing a mechanical strength at the time of locking from being reduced, thereby enabling a secure locking state and an unlocking state.

[0006]

According to a first aspect of the present invention, there is provided a double-side reclining device comprising: a base member fixed to a seat cushion; a base member rotatably supported by the base member; A reclining device having at least a rotating arm fixed to the base member and a rotating shaft inserted between the base member and the rotating arm is provided on both the outer side and the inner side of the seat cushion, and rotation of one of the reclining devices is performed. In a two-sided reclining device in which a shaft and a rotation shaft of the other reclining device are connected via a connection rod, an end of the connection rod is formed in a hollow shape into which the rotation shaft can be inserted, and the end of the connection rod is rotated. The press is performed in a state where one end in the longitudinal direction of the fitting portion with the shaft has dimensional accuracy in a direction orthogonal to the longitudinal direction of the fitting portion. The first joint portion is formed by molding, and the other end in the longitudinal direction of the fitting portion is press-molded with the dimensional accuracy in a direction different from the first joint portion by a predetermined angle different from that of the first joint portion. A part is formed.

According to the first aspect of the present invention, the end of the connecting rod is formed in a hollow shape into which a rotating shaft can be inserted, and one end in the longitudinal direction of a fitting portion between the end of the connecting rod and the rotating shaft is connected to the end of the connecting rod. The first joint is formed by press-forming in a state where dimensional accuracy in a direction perpendicular to the longitudinal direction of the fitting portion is obtained, and the other end of the fitting portion in the longitudinal direction is in a predetermined Since the second joint portion is formed by press forming in a state where the dimensional accuracy in directions different in angle is obtained, the dimensional accuracy can be individually obtained in the first joint portion and the second joint portion. In addition, the connecting rod can be connected to the rotating shaft by pressing with high dimensional accuracy, so that rattling can be prevented and generation of abnormal noise can be prevented.

[0008] Further, the reclining device on both sides according to claim 2 includes a base member fixed to the seat cushion;
A reclining device including at least a rotating arm rotatably supported by the base member and fixed to a seat back, and a rotating shaft inserted between the base member and the rotating arm. Provided on both the inner side, in a two-sided reclining device in which the rotation axis of one reclining device and the rotation axis of the other reclining device are connected via a connection rod, the end of the connection rod has a hollow in which the rotation shaft can be inserted. One end in the longitudinal direction of the fitting portion between the end portion of the connecting rod and the rotating shaft is press-formed in a state where dimensional accuracy in the right and left direction perpendicular to the longitudinal direction of the fitting portion is obtained. 1
Is formed, and the other end in the longitudinal direction of the fitting portion is press-molded in a state where the dimensional accuracy in the vertical direction perpendicular to the longitudinal direction of the fitting portion is obtained, to form a second joining portion. It is characterized by having.

According to the second aspect of the present invention, the end of the connecting rod is formed in a hollow shape into which the rotary shaft can be inserted, and one end in the longitudinal direction of a fitting portion between the end of the connecting rod and the rotary shaft is formed. The first joint portion is formed by press-molding in a state where dimensional accuracy in the left-right direction perpendicular to the longitudinal direction of the fitting portion is obtained,
Since the other end of the fitting portion in the longitudinal direction is press-formed with the dimensional accuracy in the vertical direction perpendicular to the longitudinal direction of the fitting portion being formed to form the second coupling portion, the first coupling portion is formed. The joining portion and the second joining portion are press-formed with dimensional accuracy in the left-right direction and up-down direction, and dimensional accuracy can be individually obtained in the left-right direction and up-down direction. Can be connected by press with high dimensional accuracy,
The occurrence of rattling can be prevented, and the occurrence of abnormal noise can be prevented.

[0010] The reclining device on both sides according to claim 3 includes a base member fixed to the seat cushion;
A reclining device including at least a rotating arm rotatably supported by the base member and fixed to a seat back, and a rotating shaft inserted between the base member and the rotating arm. A reclining device provided on both sides of the inner side, wherein the rotating shaft of one reclining device and the rotating shaft of the other reclining device are connected via a connecting rod, wherein the rotating shaft of the reclining device has four faces, The end of the rod is formed in a hollow shape into which the rotating shaft can be inserted, and one end of the fitting portion between the end of the connecting rod and the rotating shaft in the longitudinal direction is perpendicular to the longitudinal direction of the fitting portion. The first joint is formed by press-forming with dimensional accuracy, and the other end in the longitudinal direction of the fitting portion is in the longitudinal direction of the fitting portion. Wherein the second coupling portion is press-formed in a state that issued the interlinks vertical dimension accuracy are formed.

According to the third aspect of the present invention, the rotating shaft of the reclining device has four faces, and the end of the connecting rod is formed in a hollow shape into which the rotating shaft can be inserted. One end of the fitting portion with the shaft in the longitudinal direction is press-molded in a state where dimensional accuracy in the left-right direction perpendicular to the longitudinal direction of the fitting portion is obtained to form a first joint portion, and the first joining portion is formed. Since the other end in the longitudinal direction is press-formed with the dimensional accuracy in the vertical direction perpendicular to the longitudinal direction of the fitting part being formed to form the second joint part, the first joint part and the second joint part are formed. The joints are press-formed with the dimensional accuracy in the left-right direction and the up-down direction, and the dimensional accuracy can be individually obtained in the left-right direction and the up-down direction. Can be connected by pressing Preventing, it is possible to prevent the generation of noise.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a reclining device according to the present invention. 1 and 2 and FIGS. 3 (a), 3 (b) and 3 (c) show an embodiment of a double-sided reclining device according to the present invention. Are provided on both the outer side and the inner side.

As shown in FIG. 1, a pair of turning arms 27 attached to the left and right sides of the seat back 13 are provided on a pair of base members 25 fixed to the left and right sides of the seat cushion 12 of the vehicle seat 11, respectively. And is rotatably held about a rotation shaft 23 fixed to the.

Although the base member 25 and the pivot arm 27 are formed on the left and right, only one is shown and the other is not shown. The configuration of the pair of left and right reclining devices 21 of the both-side reclining device may be a conventionally known device. The present invention can be applied to a power seat.

The rotation shaft 23 of the reclining device 21 has four surfaces having a rectangular cross section. The rotation shafts 23 of the pair of left and right reclining devices 21 are connected via a connecting rod 31.

The end 31a of the connecting rod 31 is formed in a hollow shape into which the end 23a of the rotating shaft 23 can be inserted. The end 31a of the connecting rod 31 and the end 23a of the rotating shaft 23 are formed.
Are fitted to each other to form a fitting portion 33.

The end 31a of the connecting rod 31 and the rotating shaft 23
One end of the fitting portion 33 in the longitudinal direction with the end portion 23a is press-formed in a state where dimensional accuracy in the right and left direction perpendicular to the longitudinal direction of the fitting portion 33 is obtained, to form the first coupling portion 33a. I have.

The other end of the fitting portion 33 in the longitudinal direction is press-formed with the dimensional accuracy in the vertical direction perpendicular to the longitudinal direction of the fitting portion 33 being formed to form a second coupling portion 33b. .

The first connecting portion 33a and the second connecting portion 33b
Are press-formed with dimensional accuracy in the left-right direction and the up-down direction, and dimensional accuracy can be individually obtained in the left-right direction and the up-down direction. It is possible to connect to the four surfaces of 23a with a press with high dimensional accuracy, to prevent rattling and to prevent generation of abnormal noise.

In this embodiment, the first coupling portion 33a
The description has been given of the case where the second joint portion 33b and the second coupling portion 33b are press-formed in a state where the dimensional accuracy in the left-right direction and the up-down direction is obtained.

The end portion 31a of the connecting rod 31 can be formed on an even numbered surface of four or more surfaces. In this case, the other two surfaces in different directions with respect to one of the two surfaces exhibit dimensional accuracy. It is only necessary to press-mold.

[0022]

As described above, according to the reclining device according to the first aspect, the end of the connecting rod is formed in a hollow shape into which the rotating shaft can be inserted, and the end of the connecting rod and the rotating shaft are connected to each other. One end of the fitting portion in the longitudinal direction is press-formed with a dimensional accuracy in a direction orthogonal to the longitudinal direction of the fitting portion to form a first joint portion, and the longitudinal direction of the fitting portion is formed. The other end of the first joint is press-molded with a dimensional accuracy in a direction different from the first joint by a predetermined angle and the second joint is formed, so that the first joint and the second joint are formed. With this, the dimensional accuracy can be individually obtained, and the connecting rod can be connected to the rotating shaft by pressing with high dimensional accuracy.
The occurrence of rattling can be prevented, and the occurrence of abnormal noise can be prevented.

According to the two-sided reclining device of the second aspect, the end of the connecting rod is formed in a hollow shape into which the rotating shaft can be inserted, and the connecting portion between the end of the connecting rod and the rotating shaft is formed. One end in the longitudinal direction is press-molded in a state where the dimensional accuracy in the left-right direction perpendicular to the longitudinal direction of the fitting portion is formed to form a first coupling portion, and the other end in the longitudinal direction of the fitting portion is Since the second joint is formed by press-forming in a state where dimensional accuracy in the vertical direction perpendicular to the longitudinal direction of the fitting part is obtained, the first joint and the second joint are in the left-right direction. And press-formed in a state where the dimensional accuracy in the vertical direction is obtained,
The dimensional accuracy can be individually obtained in the horizontal direction and the vertical direction, and the connecting rod can be connected to the rotating shaft by pressing with high dimensional accuracy to prevent rattling and noise. Can be.

According to the reclining device of the third aspect, the rotation shaft of the reclining device has four faces, and the end of the connecting rod is formed in a hollow shape into which the rotating shaft can be inserted. One end in the longitudinal direction of the fitting portion between the end of the shaft and the rotating shaft is press-formed with the dimensional accuracy in the left-right direction orthogonal to the longitudinal direction of the fitting portion, and the first is formed.
Is formed, and the other end in the longitudinal direction of the fitting portion is press-molded in a state where the dimensional accuracy in the vertical direction perpendicular to the longitudinal direction of the fitting portion is obtained, to form a second joining portion. Therefore, the first joint portion and the second joint portion are press-formed with the dimensional accuracy in the left-right direction and the up-down direction, and the dimensional accuracy can be individually obtained in the left-right direction and the up-down direction. The connecting rod can be connected to the four surfaces of the rotating shaft by pressing with high dimensional accuracy, preventing rattling,
Generation of abnormal noise can be prevented.

According to the present invention, the connecting rod can be connected to the four surfaces of the rotating shaft by pressing with high dimensional accuracy, so that rattling can be prevented, abnormal noise can be prevented, and the locking noise can be reduced. The lock state and the lock release state can be reliably performed without lowering the mechanical strength, and when applied to a power seat, it is possible to prevent generation of abnormal noise due to rattling at the time of driving the motor. A two-sided reclining device can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a vehicle seat to which a two-sided reclining device according to the present invention is applied.

FIG. 2 is a perspective view of an end of a connecting rod and a rotating shaft of the double-sided reclining device according to the present invention.

FIG. 3 is a diagram illustrating a fitting state between an end of a connecting rod and a rotating shaft of the reclining device on both sides according to the present invention,
(A) is a front view, (b) is a sectional view taken along line AA of (a),
(C) is a sectional view taken along line BB of (a).

4 (a) is a front view, and FIG. 4 (b) is a cross-sectional view taken along the line AA of FIG. 4 (a), showing the fitting state of the end of the connecting rod and the rotating shaft of the conventional both-side reclining device.

DESCRIPTION OF SYMBOLS 11 Vehicle seat 12 Seat cushion 13 Seat back 21 Reclining device 23 Rotating shaft 23a End 25 Base member 27 Rotating arm 31 Connecting rod 31a End 33 Fitting part 33a First connecting part 33b Second Joint of

Claims (3)

[Claims] 1. A base member fixed to a seat cushion, a rotation arm rotatably supported by the base member and fixed to a seat back, and a rotation inserted between the base member and the rotation arm. A reclining device having at least a shaft is provided on both the outer side and the inner side of the seat cushion, and a double-sided reclining device in which the rotating shaft of one reclining device and the rotating shaft of the other reclining device are connected via a connecting rod. An end of the connecting rod is formed in a hollow shape into which a rotating shaft can be inserted, and one end in a longitudinal direction of a fitting portion between the end of the connecting rod and the rotating shaft is orthogonal to the longitudinal direction of the fitting portion. The first joint is formed by press-forming with dimensional accuracy in the direction, and the other end in the longitudinal direction of the fitting portion is in contact with the first joint. Sides reclining apparatus characterized by second coupling portion in a state that issued the angle different dimensions precision press molded are formed. 2. A base member fixed to a seat cushion, a rotation arm rotatably supported by the base member and fixed to a seat back, and a rotation inserted between the base member and the rotation arm. A reclining device having at least a shaft is provided on both the outer side and the inner side of the seat cushion, and a double-sided reclining device in which the rotating shaft of one reclining device and the rotating shaft of the other reclining device are connected via a connecting rod. An end of the connecting rod is formed in a hollow shape into which a rotating shaft can be inserted, and one end in a longitudinal direction of a fitting portion between the end of the connecting rod and the rotating shaft is orthogonal to the longitudinal direction of the fitting portion. The first joint portion is formed by press-forming with dimensional accuracy in the left-right direction, and the other end of the fitting portion in the longitudinal direction is the length of the fitting portion. Sides reclining apparatus characterized by the second coupling portion is press-molded is formed in a state that issued the vertical dimension accuracy orthogonal to the direction. 3. A base member fixed to a seat cushion, a rotation arm rotatably supported by the base member and fixed to a seat back, and a rotation inserted between the base member and the rotation arm. A reclining device having at least a shaft is provided on both the outer side and the inner side of the seat cushion, and a double-sided reclining device in which the rotating shaft of one reclining device and the rotating shaft of the other reclining device are connected via a connecting rod. The rotating shaft of the reclining device has four faces, the end of the connecting rod is formed in a hollow shape into which the rotating shaft can be inserted, and the longitudinal direction of the fitting portion between the end of the connecting rod and the rotating shaft. One end is press-molded in a state where dimensional accuracy is obtained in a lateral direction orthogonal to the longitudinal direction of the fitting portion, and the first coupling portion is formed. The other end in the longitudinal direction of the fitting portion is press-formed in a state in which vertical dimensional accuracy perpendicular to the longitudinal direction of the fitting portion is obtained to form a second joint portion. And reclining device on both sides.