JPH04115439U - Emergency locking device for vehicle seats - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an emergency locking device capable of locking the tilting of a free hinge side seat back only in an emergency in a vehicle seat having a cantilevered seat reclining device. [Structure] On the free hinge side of the vehicle seat, there is a back arm 20 having a tooth 22 on the lower edge, an upper tooth 30 having a tooth 32 that is the same shape and parallel to the tooth 22 of the back arm 20, and the upper. A lower tooth 40 having a wall thickness capable of engaging with both the tooth 30 and the back arm 20 and biased toward the upper tooth 30 is provided, and normally the tooth portions 22 and 32 are arranged with a phase shift,
In an emergency, the upper teeth 30 are displaced so that the phases of the teeth 32 match, and the teeth 42 of the lower teeth 40 are formed to mesh with these teeth 22 and 32.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is applicable to vehicle seats equipped with a cantilever seat reclining device. , to lock the seat back on the free hinge side in an emergency such as when an impact load is applied. The present invention relates to a device that uses

0002

[Conventional technology]

Generally, seat torque is used to adjust the angular posture of the seat back of a vehicle seat. As a lining device, the teeth formed on the upper teeth and the teeth formed on the lower teeth are used. The angular posture of the seatback is kept constant by engaging with the lower teeth. By changing the meshing position of the teeth with respect to the teeth of the upper teeth, the seat A latch mechanism type stepped adjustment device that allows you to change the angle posture of the back, seat bar The seat back is tightened by meshing gears placed at the pivot point between the back and the seat cushion. By keeping the angular posture of the back seat constant and rotating the gears, the angular posture of the seat back can be changed. Taumel mechanism stepless adjustment device that finely adjusts the force, and a combination of these two types Some devices are known, but these are so-called devices that are attached only to one side of the seat. Since it is a cantilevered seat reclining device, it is particularly prone to impact loads. There was a fear that the seat back would not be able to be held sufficiently in an emergency. . In other words, in the event of an emergency such as when the vehicle starts suddenly or is involved in a collision, the The impact causes a rearward load to be applied to the occupant, pushing the seatback backwards. However, in such a case, one side of the seat back is equipped with a seat reclining device. However, the other side of the seatback is twisted backwards by the load. Because of this, there were concerns about the safety of the passengers.

0003 And, as a means to solve the above problem, there is a seat strip on both sides of the seat. A craning device is provided, and these are linked by a connecting rod and a connecting wire. A so-called double-sided seat reclining device is known.

0004

[Problem that the idea aims to solve]

However, the conventional double-sided seat reclining device described above is supported on both sides, so the load-bearing performance is excellent, but the Operate the control lever of the seat reclining device installed on one side to adjust the seat. When adjusting the back to the desired tilt angle, the other seat torque is applied via the connecting rod. The operating lever is designed to accurately transmit the operating force of the operating lever to the lining device. Not only does it take a lot of force to operate the bar, but even then, the operating force may not be synchronized or the system may However, there was a problem in that it was easy to cause a phase shift during back-up.

[0005] Furthermore, in conventional double-sided seat reclining devices, it is difficult to assemble the device. High precision is required and the number of parts increases, resulting in a considerable increase in costs. There was also the problem of inviting people.

[0006] This idea solves the problems of the conventional seat reclining device mentioned above. Vehicles with a cantilever seat reclining device For vehicle seats, the tilting of the free hinge side seat back is locked only in an emergency. The purpose of this invention is to provide an emergency locking device that can

[0007]

[Means to solve the problem]

In order to achieve the above-mentioned purpose, the vehicle seat emergency locking device of this invention has the following features: Supports the seat back against the seat cushion so that it can tilt freely on both sides, and A vehicle seat with a side reclining device that allows the inclination angle to be adjusted freely. On the other side of this vehicle seat, there is a seat that is pivoted to the base plate and has teeth on the lower edge. The back arm is attached to the back arm so that the lower edges are parallel to each other. , and an upper tooth having teeth having the same shape as the teeth of the back arm on the lower edge thereof. The front part has a wall thickness that can be engaged with both the upper tooth and the back arm. and lower teeth whose bases are pivoted to the base plate, - The tooth can be displaced with the deformation of the back arm, and The teeth of the arm and the teeth of the upper tooth are arranged with a phase shift, and The lower teeth are constantly biased toward the upper teeth, and the upper teeth are displaced. When the teeth of the lower tooth are in contact with the teeth of the back arm and the upper tooth. It is characterized by being formed so as to mesh with both of the teeth of the base.

[0008]

[Effect]

According to the above configuration, the other side of the vehicle seat is usually free hinged. However, in an emergency when the vehicle receives an impact load, the torsional displacement of the back arm Then, the teeth of the back arm and the teeth of the upper tooth are in phase, and the lower tooth - The teeth of the teeth mesh.

[0009] Therefore, according to the vehicle seat emergency locking device of this invention, the free hinge The seat back on the side can be securely locked only in an emergency, and the seat back on the other side -In conjunction with the locking effect of the reclining device side), it protects the occupants from impact loads. can be retained.

0010 In addition, the emergency lock is activated by sensing static input to the back arm. , which allows for reliable locking and reduces the weight of the emergency locking device itself. be able to.

[0011] Furthermore, the vehicle seat emergency locking device of this invention has a seal on one side of the seat. There is no need to link the tri-clining device with the emergency locking device on the other side. , there is no synchronization of operating force or phase shift of the seat back, and The number of parts and assembly man-hours can be reduced, resulting in lower weight and cost. can be achieved.

0012

【Example】

The emergency locking device for vehicle seats of this invention will be described below based on the embodiment shown in the drawings. This will be explained in detail.

[0013] FIG. 1 is a front explanatory view showing one embodiment of the vehicle seat emergency locking device of this invention. , FIG. 2 is an exploded perspective view, and FIG. 3 is an emergency locking device for a vehicle seat according to this invention. FIG.

[0014] In the embodiment shown in FIGS. 1 and 2, S2 is a free hinge of a vehicle seat. An emergency locking device provided on the side is shown, and this emergency locking device S2 is attached to the base plate. A back arm 20 that is pivoted to the Part tooth 30 meshes with this upper tooth 30 and the back arm 20 and a lower tooth 40 pivotably attached to the base plate 10. There is.

[0015] The base plate 10 is attached to the side of the seat cushion (not shown) and to the back. The arms 20 are fixed to the sides of seat backs (not shown), and these bases The base plate 10 and the back arm 20 are rotatably attached to each other by a first pivot 31. It is.

[0016] The back arm 20 has teeth (ratchet teeth) 22 on its lower edge. A pair of elongated holes 23a and 23b formed above 22 are provided with an upper tool to be described later. Pins 33a and 33b protruding from the base 30 are fitted. Also back arm 20 is a litter suspended between the first pivot 31 and a pin 34 provided on the back arm 10. It is biased counterclockwise by a spring 21.

[0017] The upper tooth 30 is inserted into the first pivot 31 by inserting its center into the back It is integrally attached to the lower part of the back arm 20, and is parallel to the lower edge of the back arm 20. The lower edge of the circular arc shape has a tooth portion (ratchet) that has the same shape as the tooth portion of the back arm 20. Teeth) 32 are formed. Further, the long holes 23a and 2 of the back arm 20 are Pins 33a and 33b are protruded at positions corresponding to 3b, respectively. These pins 33a and 33b fit into the long holes 23a and 23b, respectively. ing. Furthermore, this upper tooth 30 has a return spring suspended on the pin 34. It is constantly biased counterclockwise by the pin 21.

[0018] Furthermore, on the outside of the back arm 20, the back arm 20 and the upper tooth 30 are provided. and a first pivot 31 and a lower tooth 40, which will be described later, so as to sandwich the lower teeth 40, which will be described later. A holder plate 50 fixed to a second pivot 41 is disposed.

[0019] The base of the lower tooth 40 is connected to a second pivot 41 fixed to the base plate 10. The upper edge of the free end side is rotatably attached to the back arch. It has a wall thickness that can be engaged with both the arm 20 and the upper tooth 30, and the back A tooth portion that meshes with the tooth portion 22 of the arm 20 and the tooth portion 32 of the upper tooth 30. (Ratchet pawl) 42 is formed. Also, near the base of lower tooth 40 A protrusion 43 is formed at the position, and the protrusion 43 and the base plate 10 The lower teeth 40 are constantly urged upward by a spring 44 suspended between them. ing.

[0020] In the above configuration, the back arm 2 is normally operated by the return spring 21. 0 in the counterclockwise direction, the teeth 22 of the back arm 20 and the upper tooth The teeth 32 of the upper teeth 30 are out of phase, and a spring 44 causes the upper teeth 30 to The teeth 42 on the upper edge of the lower tooth 40 that are biased toward the side are connected to the back arm 20. Although the tooth portion 22 of the upper tooth 30 is in pressure contact with the tooth portion 32 of the upper tooth 30, the tooth The portion 42 is not engaged with the tooth portion 22 and the tooth portion 32 and is in a free hinge state. It has become.

[0021] However, in an emergency when the vehicle is subjected to an impact load such as a sudden start or a collision, the backing up A torsional displacement occurs in the arm 20, and the back arm 20 attempts to rotate clockwise. Ru.

[0022] Then, due to this torsional displacement of the back arm 20, the teeth of the back arm 20 22 and the tooth portion 32 of the upper tooth 30 are in phase. In addition, the bag at this time The amount of movement of the arm 20 and the upper tooth 30 is determined by the distance between the long holes 23a, 23b and the pin 3. It is regulated by the positional relationship between 3a and 33b.

[0023] Then, the tooth portion 22 of the back arm 20 and the tooth portion 32 of the upper tooth 30 As the phases match, the lower tooth 40 moves upward due to the biasing force of the spring 44. The teeth 42 of the lower teeth 40 are rotated, and the teeth 42 of the lower tooth 40 are connected to the teeth 22 of the back arm 20 and the upper Since it meshes with both the teeth 32 of the parts 30, the base plate 10 and the back Arm 20 will be reliably locked.

[0024] In addition, when the impact load in an emergency subsides, the back arm 20 and lower arm The engagement of the base 40 generates a force that tries to rotate the back arm 20 counterclockwise. Then, the lower tooth 40 has a tooth shape that locks naturally, so it can be reset. If the lower tooth 40 is pulled down by the action of the spring spring 21, the back The tooth portion 22 of the arm 20 and the tooth portion 32 of the upper tooth 30 are again shifted in phase. Even if the control of the lower teeth 40 is released, the teeth 42 of the lower teeth 40 are The teeth 22 of the back arm 20 and the teeth 32 of the upper teeth 30 do not mesh and are free. - Returns to hinged state.

[0025] Therefore, according to the above configuration, due to the torsional displacement of the back arm 20, Since the lower teeth 40 and upper teeth 30 are engaged, the reclining The free hinge side of the seat can be locked instantly and reliably, ensuring occupant safety. Not only can the device be maintained at a constant temperature, but the weight of the device can also be reduced.

[0026] Figure 3 shows a driver side vehicle seat equipped with an emergency locking device configured as described above. This is an overall configuration diagram, and the latch mechanism described above as the conventional technology is attached to the outer side of the seat S. type stepped adjustment device, Taumel mechanism type stepless adjustment device, and equipment that uses these two types together. A known seat reclining device S1 such as a An actual usage mode in which the quick locking device S2 is arranged is shown.

[0027] That is, in the vehicle seat shown in FIG. 3, the emergency locking device S2 is normally locked. Because it is in a hinged state, the control lever L of the seat reclining device S1 etc. The tilt angle of the seat back can be adjusted by operating the .

[0028] In an emergency where an impact load occurs such as a sudden start or a collision, the emergency locking device S Since the lower teeth 40 of No. 2 engage with the upper teeth 30, the seat reclines. Together with the locking effect of the locking device S1, the seat S is reliably locked, and the personnel can be safely protected from danger.

[0029]

[Effect of the idea]

As mentioned above, according to the vehicle seat emergency locking device of this invention, free The seat back on one side can be locked securely only in an emergency; In addition to the locking effect of the seat reclining device (on the seat reclining device side), it also protects the occupants from impact loads. Can be held completely.

[0030] In addition, the emergency lock is activated by sensing static input to the back arm. , which allows for reliable locking and reduces the weight of the emergency locking device itself. be able to.

[0031] Furthermore, the vehicle seat emergency locking device of this invention has a seal on one side of the seat. There is no need to link the tri-clining device with the emergency locking device on the other side. , there is no synchronization of operating force or phase shift of the seat back, and The number of parts and assembly man-hours can be reduced, resulting in lower weight and cost. can be achieved.

[Brief explanation of drawings]

FIG. 1 is an explanatory front view showing one embodiment of the vehicle seat emergency locking device of this invention.

FIG. 2 is also an exploded perspective explanatory view.

FIG. 3 is a schematic perspective view showing an example of the use of the vehicle seat emergency locking device of this invention.

[Explanation of symbols]

10 Base plate 20 Back arm 21 Return spring 22 Teeth (ratchet teeth) 23a long hole 23b long hole 30 Upper Tooth 31 First axis 32 Teeth (ratchet teeth) 33a pin 33b pin 40 Lower Tooth 41 Second axis 42 Teeth (ratchet pawl) 43 Protrusion 44 Spring 50 Holder plate S vehicle seat S1 Seat reclining device S2 Emergency locking device

Claims (1)

[Scope of utility model registration request] Claim 1: A vehicle seat in which a seat back is tiltably supported on both sides with respect to a seat cushion, and one side is adjustable in inclination angle by a seat reclining device, wherein a base plate is provided on the other side of the vehicle seat. a back arm that is pivoted and has teeth on its lower edge;
An upper tooth is attached to the back arm so that its lower edges are parallel to each other, and has teeth on the lower edge that have the same shape as the teeth of the back arm, and is capable of meshing with both the upper teeth and the back arm. and a lower tooth whose base is pivotally attached to the base plate, the upper tooth can be displaced as the back arm deforms, and the phase between the teeth of the back arm and the teeth of the upper tooth is adjusted. the lower teeth are always biased toward the upper teeth, and when the upper teeth are displaced, the teeth of the lower teeth mesh with both the teeth of the back arm and the upper teeth. An emergency locking device for a vehicle seat, characterized in that it is formed to do so.