JPH0529444U - Vehicle seat - Google Patents

Abstract

(57) [Abstract] [Purpose] In a vehicle seat in which a seat reclining device is provided only on one side of a seat, the rotation of the other side of the seat back can be locked only in an emergency when a large impact load is applied to the vehicle. . [Structure] In the vehicle seat S according to the present invention, the emergency locking device S ₂ has an internal gear 1 on the seat back S / B side.
The sub-arm 20 is attached to the base plate 10 on which 1a is formed.
And an upper bracket 30 are rotatably attached to the shaft, and a lock tooth 40 is disposed on the sub arm 30 so as to be engageable with and disengageable from the internal gear 11a.
A feature is that a cam member 50 for operating the lock tooth 40 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle seat in which a seat reclining device is provided only on one side of the seat and the other side is a free hinge, and particularly, in an emergency when a large impact load is applied to the vehicle, the seat back of the other side of the seat is secured. The present invention relates to a vehicle seat provided with an emergency lock device capable of locking rotation.

[0002]

[Prior Art]

 Generally, as a seat reclining device for adjusting the inclination angle of the seat back of a vehicle seat, the inclination angle of the seat back is kept constant by the engagement between the teeth of the upper part and the teeth of the lower tooth. The latch-type stepped adjustment device that can change the seat back inclination angle by changing the meshing position of the upper part of the seat back to the teeth, and the meshing of the gears arranged on the pivotal support of the seat back and the seat cushion. The Taumel mechanical stepless adjustment device, in which the tilt angle of the seat back is kept constant, and the tilt angle of the seat back is finely adjusted by rotating the gears, and a device using these two types in combination are known. ing.

By the way, in a vehicle seat of a so-called cantilever seat reclining device in which the seat reclining device described above is provided only on one side of the seat, since the other side of the seat is a free hinge, a large impact load is applied to the vehicle. There is a risk that the seat back cannot be held sufficiently in an emergency.

That is, in an emergency such as a sudden start of a vehicle or a collision, a large impact load is applied to the seat back through the occupant in a forward or backward direction in an emergency. In such a case, one side of the seat back is firmly locked by the seat reclining device, but the other side is not locked by the free hinge, so that it is twisted in the front-rear direction due to the impact load, There is a risk that the seat back cannot be held sufficiently.

Therefore, as a means for solving the above-mentioned problems, seat reclining devices are provided on both sides of the seat, and so-called double-end seat reclining devices, which are linked by connecting rods or connecting wires, are mounted. Vehicle seats are used.

[0006]

[Problems to be solved by the device]

 However, in a vehicle seat equipped with the above-mentioned conventional double-sided seat reclining device, the seat back is supported on both sides, so although the load-carrying performance is exceeded, the seat reclining provided on one side of this seat When adjusting the seat back to the desired tilt angle by operating the operation lever of the device, operate the operation lever in order to accurately transmit the operation force of the operation lever to the seat reclining device on the other side. Not only does it require a great deal of force, but there were problems such as poor synchronization during operation and the possibility of a seat back phase shift.

Further, since the structure of the both-ends seat reclining device is required to have high accuracy and the number of parts is increased, there is a problem that the cost is considerably increased.

This invention has been made to solve the above-mentioned problems of the prior art. The purpose of this invention is to provide a vehicle seat in which a seat reclining device is provided only on one side of the seat. It is to be able to lock the rotation of the seat back on the other side only in an emergency when a large impact load is applied.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is a vehicle seat in which a seat reclining device is arranged on one side of the seat and an emergency locking device is arranged on the other side thereof, wherein the emergency locking device is installed on the seat back side. A sub-arm and an upper bracket are rotatably attached to a base plate on which a tooth gear is formed, and a lock tooth is arranged on the sub-arm so as to be engageable with and disengageable from the internal gear, and the lock tooth is attached to the upper bracket. It is characterized in that a cam member for operating is provided.

[0010]

[Action]

 According to the configuration described above, the seat back on the other side (emergency locking device side), which is normally a free hinge, can be locked only in an emergency when a large impact load is applied to the vehicle. That is, in an emergency, the upper bracket rotates in conjunction with the torsional displacement of the seat back on the other side, and the rotation of the cam member and the lock tooth cooperate with each other to cause the lock tooth and the internal gear to mesh with each other. The rotation of the side seat back can be locked.

Therefore, according to the vehicle seat of the present invention, the rotation of the seat back can be firmly locked together with the locking effect of the one side (seat reclining device side) in an emergency, and the occupant's safety can be improved. Can be improved.

Further, since the cantilever seat reclining device is normally used, it is possible to eliminate the synchronization failure and the phase shift of the seat back at the time of operation, which are problems in the conventional two-end seat reclining device. The number of parts and the number of assembly steps can be significantly reduced, and the weight and cost can be reduced.

[0013]

【Example】

 The present invention will be described below based on the embodiments shown in the drawings.

1 to 4 relate to a first embodiment of the present invention, FIG. 1 is a schematic perspective view of a vehicle seat, FIG. 2 is a front view of an emergency lock device, and FIG. 3 is a main part of FIG. FIG. 4 is an exploded perspective view, and FIG. 4 is an operation explanatory view of the emergency lock device at the time of locking.

In the figure, S is a vehicle seat in which a seat reclining device S ₁ is arranged on one side of the seat and an emergency locking device S ₂ is arranged on the other side.

In this invention, in particular, the emergency locking device S ₂ pivotally mounts the sub arm 20 and the upper bracket 30 on the base plate 10 having the internal gear 11a formed on the seat back S / B side. In addition, the sub-arm 30 is provided with a lock tooth 40 that can be engaged with and disengaged from the internal gear 11a, and the upper bracket 30 is provided with a cam member 50 that operates the lock tooth 40.

Next, the structure of the first embodiment of the present invention will be described in more detail.

The vehicle seat S is a publicly known device such as a latch type stepped adjusting device, a Taumel mechanism type stepless adjusting device, or a device using a combination of these two types on one side of the seat cushions S and C. The seat reclining device S ₁ and the emergency locking device S ₂ are arranged on the other side, and the seat reclining device S ₁ and the emergency locking device S ₂ are connected by a connecting rod 60. By operating the operation lever 61 of the seat reclining device S ₁ , the seat backs S and B can be adjusted to a desired inclination angle with respect to the seat cushions S and C.

In FIG. 1, C and F are seat cushion frames of the seat cushions S and C, and B and F are seat back frames of the seat backs S and B.

The emergency lock device S ₂ includes a base plate 10, a sub arm 20, an upper bracket 30, a lock tooth 40, and a cam member 50.

The base plate 10 is fixed to the other side of the seat cushion frames C and F, and a lower bracket 11 having an internal gear 11a is fixed thereto by a mounting bolt 12 having a flange portion 12a. Further, the center of the internal gear 11a is arranged on the axis of the connecting rod 60.

The sub-arm 20 is arranged so as to overlap the lower bracket 11, and is formed in the lower bracket 11 concentrically with the round hole 60 a formed in the axial center of the connecting rod 60. It is rotatably attached to a sub-arm attachment shaft 21 that is fitted in the through hole 11b with its movement in the axial direction restricted. A base of a connecting link 62 having a connecting pin 63 planted at its free end is fixed to the end of the connecting rod 60, and the connecting pin 63 is formed on the sub-arm 20 above the shaft attachment portion. It is fitted in the round hole 20a.

The upper bracket 30 is arranged so as to overlap the sub-arm 20, and the end portion of the sub-arm mounting shaft 21 is fixed to a deformed hole 30a formed in the lower portion. An arcuate elongated hole 30b centered on the irregular hole 30a is formed above the irregular hole 30a, and a connecting pin 63 protruding from the sub-arm 20 is inserted into the elongated hole 30b. Further, an arm 31 fixed to the seat back frames B and F is integrally attached to the upper bracket 30 by a mounting pin 32.

A lock tooth, for example, a pair of lock teeth 40, 40 is arranged in the internal gear 11 a, and its base is rotatably attached to the sub arm 20 by a lock tooth mounting shaft 41, and is attached to one free end side. A tooth portion 40a that engages and disengages with the internal gear 11a is formed with an engaging portion 40b that abuts the cam member 50 on the other free end side. A tension spring 42 is mounted on the other free end side of the lock teeth 40, 40. The tension spring 42 causes the lock teeth 40, 40 to move the engaging portion 40b to the cam member 50. Being energized.

The cam member 50 has its base fixed to the sub-arm mounting shaft 21, and is arranged inside the internal gear 11a. On the free end side of the cam member 50 facing the respective engaging portions 40b of the lock teeth 40, 40, convex portions 50a, 50b abutting on the respective engaging portions 40b are formed in a bifurcated manner.

Next, the operation of the first embodiment of the present invention will be described.

At normal times, as shown in FIG. 2, the engaging portions 40 b of the lock teeth 40, 40 are pressed against the convex portions 50 a, 50 b of the cam member 50 by the spring force of the tension spring 42, and the lock teeth 40 , 40 does not mesh with the internal gear 11a, and the support portion on the other side of the seatbacks S and B is in a free hinge state.

In this state, when the operating lever 61 of the seat reclining device S ₁ is operated to unlock and the seat backs S and B are rotated, the connecting link 62 moves the connecting link 62 through the arrow AB. And the sub-arm 20 and the upper bracket 30 integrally rotate in the same direction about the sub-arm mounting shaft 21 as a result, thereby adjusting the inclination angle of the normal seatback S / B. be able to.

By the way, in a state in which the seat backs S and B are locked by the seat reclining device S ₁ , in an emergency such as a sudden start or collision of the vehicle, the seat backs S and B are greatly moved in the front-rear direction via the occupant. Impact load is applied. In this case, the support portion of the seat back S / B on the seat reclining device S ₁ side is locked, whereas the support portion of the emergency locking device S ₂ side is not locked. The arm 31 is twisted and displaced. For example, as shown by the solid line in FIG. 4, when the arm 31 undergoes torsional displacement in the direction of arrow C, the upper bracket 30 slides the elongated hole 30b together with the cam member 50 to the connecting pin 63 along with the displacement, and the sub arm moves. It rotates in the direction of arrow C about the mounting shaft 21.

By this rotation, the convex portions 50 a and 50 b of the cam member 50 are disengaged from the respective engaging portions 40 b of the lock teeth 40 and 40. Then, the lock teeth 40, 40 rotate in the directions of arrows E and F, respectively, by the spring force of the tension spring 42, and the tooth portion 40a thereof is brought into pressure contact with the internal gear 11a. As a result, the rotation of the arm 31 can be reliably locked.

When the impact load in an emergency is removed, the rigidity of the seatback frames B and F causes the arm 31 to rotate in the direction of arrow C ₁ and the torsional displacement of the arm 31 disappears. Then, the cam member 50 also rotates in the same direction, and when the convex portions 50a, 50a reach the positions where they are brought into contact with the respective engaging portions 40b of the lock teeth 40, 40, the lock teeth 40, 40 are moved by the springs of the tension springs 42. against the force and rotated in the arrow G and H directions, engagement between the internal gear 11a and the teeth 4 0a is released, the supporting portion of the emergency locking device S ₂ side of the seat back S · B again Free hinge state.

It should be noted that the rotation of the arm 31 can be locked by the same procedure when the arm 31 is twisted and displaced in the direction of the arrow D as shown by the phantom line in FIG.

As described above, according to the first embodiment of the present invention, the torsional displacement of the arm 31 causes the internal gear 11a to mesh with the respective tooth portions 40a of the lock teeth 40, 40. In an emergency, the free hinge arm 31, that is, the rotation of the seat backs S and B can be instantaneously and reliably locked. As a result, the safety of the occupant can be improved, the structure can be simplified, and the weight and cost can be reduced.

FIG. 5 is an explanatory view of a main part of an emergency lock device according to another embodiment of the first embodiment, in which the lock teeth 40A and 40A are slidably fitted into a guide plate 22 formed on the sub arm 20. A tooth portion 40a that engages with and disengages from the internal gear 11a is formed on the opposite side of the internal gear 11a. Further, the cam member 50A has four convex portions 50c formed on the outer peripheral surface thereof at equal intervals, and the engaging portions 40d of the lock teeth 40A, 40A are mounted on the lock teeth 40A, 40A on the convex portion 50c. It is pressed by a pair of tension springs 42A.

Other configurations and operations are similar to those shown in the first embodiment.

FIG. 6 is an explanatory view of a main part of an emergency lock device according to another embodiment of the first embodiment, and a cam member 50B is applied as a modified example of the cam member 50A shown in FIG. The cam member 50B is provided with four protrusions 50d which are substantially the same as the protrusions 50c of the cam member 50A.

Other configurations are similar to those shown in FIG.

FIG. 7 is an explanatory view of a main part of an emergency lock device according to still another embodiment of the first embodiment. Two lock teeth 40B, 40B are provided on one side of the cam member 50C. ing. Further, on the cam member 50C, convex portions 50e that come into contact with the respective engaging portions 40e of the lock teeth 40B, 40B are formed vertically with the sub-arm attachment shaft 21 interposed therebetween, respectively. The engaging portions 40e of the lock teeth 40B, 40B are in pressure contact with the convex portions 50e of the cam member 50c by a pair of tension springs 42B mounted between and.

Other configurations are the same as those shown in the first embodiment. In this embodiment, the seat backs S and B on the free hinge side correspond to the torsional displacement of the arm 31 in only one direction in an emergency. The rotation can be locked, and other configurations and operations are the same as those shown in the first embodiment.

8 to 10 relate to a second embodiment of the present invention. FIG. 8 is a front view of the emergency locking device, FIG. 9 is an exploded perspective view of the essential parts of what is shown in FIG. 8, and FIG. It is operation | movement explanatory drawing of the emergency locking device at the time of locking.

In the second embodiment of the present invention, the same or substantially the same parts as those shown in the first embodiment are designated by the same reference numerals.

The cam member 50D is formed in a disc shape, and is fixed to the upper bracket 30D by two mounting pins 51 while sandwiching the sub arm 20D. Further, the cam member 50D is formed with a round hole 50e into which the sub-arm attachment shaft 21 is fitted and a cam groove 50f is formed on the left and right sides of the round hole 50e. The cam groove 50f is composed of a base portion 50g into which the pin 43 of the lock tooth 40D, which will be described later, is inserted, and a cam portion 50h which is expanded vertically with the base portion 50g as the center.

The sub-arm 20D has a long hole 20b formed over the rotation range of the mounting pin 51. An arm (not shown) is fixed to the upper bracket 30D.

The pair of lock teeth 40D, 40D are arranged in the internal gear 11a to the left and right with the sub-arm mounting shaft 21 as the center, and are slidably fitted in the guide portion 20c formed in the sub-arm 20. ing. Further, tooth portions 40f that engage with and disengage from the internal gear 11a are formed on the respective end faces of the lock teeth 40D, 40D that face the internal gear 11a. Further, the lock teeth 40D, 40D are provided with pins 43, 43 to be inserted into the cam grooves 50f of the cam member 50D, and a spring 45 mounted between the pins 43, 43 and the cam member 50D. The lock teeth 40D, 40D are urged toward the internal gear 11a.

Next, the operation of the second embodiment of the present invention will be described.

In an emergency, for example, when the upper bracket 30D is twisted and displaced in the direction of the arrow M through the arm as shown by the solid line in FIG. While rotating with the cam member 50D in the direction of arrow M, the sub-arm mounting shaft 21 is the center. Due to the cooperative action of the cam groove 50f of the cam member 50D and the pin 43 of the lock tooth 40D by this rotation and the spring force of the spring 45, the lock tooth 40D slides in the direction of the internal gear 11a, and its tooth portion 40f is internally moved. It meshes with the toothed gear 11a under pressure. As a result, the rotation of the seat backs S and B on the emergency lock device S ₂ side can be locked.

The other operations are similar to those shown in the first embodiment, and the description thereof will be omitted.

It should be noted that when the upper bracket 30D is twisted in the direction of arrow N as shown by the phantom line in FIG. 10, the rotation of the seatbacks S and B on the emergency locking device S ₂ side is locked by the same procedure. can do.

[0049]

[Effect of the device]

 As described above, according to the vehicle seat of the present invention, the rotation of the seat back of the other side (emergency locking device side) can be reliably locked only in an emergency, and the locking of one side (seat reclining device side) can be performed. In addition to the effect, it is possible to improve the safety of passengers in an emergency. In addition, since it is a cantilever seat reclining device in normal times, it is possible to eliminate the problem of synchronization failure during operation and the phase shift of the seat back, which were problems with the conventional double-end seat reclining device. The number of man-hours required can be greatly reduced, and the weight and cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic perspective explanatory view of a vehicle seat according to the present invention.

FIG. 2 is a front explanatory view of the emergency lock device according to the first embodiment of the present invention.

FIG. 3 is an exploded perspective view of main parts of FIG.

FIG. 4 is an operation explanatory diagram when the emergency locking device shown in FIG. 2 is locked.

FIG. 5 is an explanatory view of a main part of an emergency lock device according to another embodiment of the first embodiment.

FIG. 6 is an explanatory view of a main part of an emergency lock device according to another embodiment of the first embodiment.

FIG. 7 is an explanatory view of a main part of an emergency lock device according to still another embodiment of the first embodiment.

FIG. 8 is a front view showing an emergency locking device according to a second embodiment of the present invention.

FIG. 9 is an exploded perspective view of the main part of what is shown in FIG.

FIG. 10 is an operation explanatory view when the emergency locking device shown in FIG. 8 is locked.

[Explanation of symbols]

S Vehicle seat S ₁ Seat reclining device S ₂ Emergency locking device S / C Seat cushion S / B Seat back C / F Seat cushion frame B / F Seat back frame 10 Base plate 11 Lower bracket 11a Internal gear 20 Sub-arm 20D Sub-arm 21 Sub-arm mounting shaft 30 Upper bracket 30D Upper bracket 31 Arm 40 Lock tooth 40A Lock tooth 40B Lock tooth 40D Lock tooth 50 Cam member 50A Cam member 50B Cam member 50C Cam member 50D Cam member 50a Convex portion 50b Convex portion 50f Convex portion 50d Convex portion 50d Cam groove 60 Connecting rod 61 Operating lever 62 Connecting link 63 Connecting pin

Claims (1)

[Scope of utility model registration request] 1. A vehicle seat in which a seat reclining device is arranged on one side of a seat and an emergency locking device is arranged on the other side, wherein the emergency locking device is provided on a base plate having an internal gear on the seat back side. , A sub arm and an upper bracket are rotatably attached to the shaft, a lock tooth is disposed on the sub arm so as to be engageable with and disengageable from the internal gear, and a cam member for operating the lock tooth is provided on the upper bracket. A vehicle seat characterized by the above.