JPH04115442U - 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 that is pivoted to a base plate 10, an upper tooth 30 that is attached to the back arm 20, and a back arm 20 that is pivoted to the base plate 10 so as to be able to engage with the upper tooth 30. The lower tooth 40 is attached to the lower tooth 40, and the inertia weight 5 is swingably attached to the lower tooth 40.
0, an auxiliary tooth portion 21 is provided on the lower tooth 40 side of the back arm 20, and a locking portion 51 that meshes with the auxiliary tooth portion 21 is provided on a portion of the inertia weight 50 facing the auxiliary tooth portion 21. are formed respectively.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is applicable to vehicle seats equipped with a cantilever seat reclining device. , regarding a device that locks the seat back in the event of an emergency due to an impact load, etc. It is.

0002

[Conventional technology]

Generally, seat clamps are used to adjust the angular posture of the seat back of vehicle seats. The inning device uses teeth provided on the upper teeth and teeth provided on the lower teeth. The angular posture of the seatback is kept constant by engaging with the teeth of the lower teeth. By changing the engagement position of the upper teeth with respect to the teeth, the seat back A latch mechanism type stepped adjustment device that allows you to change the angular posture of the seat back. The corners of the seat back are fixed by meshing gears placed at the pivot point with the seat cushion. By keeping the angle posture constant and rotating the gear, the angle posture of the seatback can be finely adjusted. Taumel mechanism type stepless adjustment device for adjustment, and equipment that uses these two types together. However, these are so-called cantilever mountings that are attached only to one side of the seat. Since it is a seat reclining device, it is particularly suitable for use under stress such as impact loads. There was a fear that the seat back could not be held sufficiently in an emergency.

0003 In other words, in the event of an emergency such as when the vehicle starts suddenly or is involved in a collision, A rearward load is applied to the occupant due to the impact, and the seatback is pushed backwards. However, in such a case, one side of the seat back is not connected to the seat reclining device. Although the seatback is supported, the other side of the seatback is twisted backwards by the load. Therefore, the other side will fall more backwards than the one side, which will reduce the safety of the occupants. There were concerns about their sexuality.

0004 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.

[0005]

[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 recline via the connecting rod In order to accurately transmit the operating force of the operating lever to the operating device, Not only does it require a large amount of force to operate, but it still causes poor synchronization of the operating force and seat backrest. There was a problem in that it was easy to cause a phase shift in the drive.

[0006] 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.

[0007] 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

[0008]

[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 back arm that is pivoted to the base plate. And, the upper tooth attached to this back arm and this upper tooth engage. The lower teeth are pivoted to the base plate so that they can be connected together, and the lower teeth are pivoted to the base plate. an inertia weight movably pivoted, and the rotor of the back arm. An auxiliary tooth portion is provided on the artus side, and a portion of the inertia weight that faces the auxiliary tooth portion is provided. It is characterized in that a locking portion that meshes with the auxiliary tooth portion is formed in each portion.

[0009]

[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 inertia weight swings and this inertia weight is The back arm is moved by the locking part meshing with the auxiliary tooth part in conjunction with the movement of the eight. At the same time, rotate the lower teeth toward the upper teeth to open the lower teeth. Engage with the upper teeth.

0010 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.

[0011] In addition, the inertia weight does not directly operate the lower teeth, but instead operates by twisting the back arm. By synchronizing the rotation of the lower teeth with the movement of the lower teeth, the lower teeth and upper teeth are Since the bases are engaged, locking can be achieved reliably, and the inertia way The weight of the vehicle can be reduced.

0012 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. , the number of parts and assembly man-hours can be reduced, resulting in weight reduction and cost reduction. It is possible to aim for

[0013]

【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.

[0014] Figure 1 is a front explanatory view showing an example of an emergency locking device for a vehicle seat of this invention. 2 is a schematic perspective view showing an example of the use of the vehicle seat emergency locking device of this invention. be.

[0015] In the embodiment shown in Fig. 1, S2 is provided on the free hinge side of the vehicle seat. An emergency locking device is shown, and this emergency locking device S2 is pivoted to the base plate 10. The back arm 20 and the upper tooth attached to this back arm 20 30, and is pivoted to the base plate 10 so as to be able to engage with the upper teeth 30. A lower tooth 40 is mounted coaxially with the lower tooth 40 so as to be swingable. It is composed of an inertia weight 50.

[0016] 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.

[0017] Further, at the lower edge of the back arm 20, a locking portion 5 of an inertia weight 50, which will be described later, is provided. An auxiliary tooth portion 21 is formed in a portion facing 1.

[0018] 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 system 20, and is centered on the axis of the first pivot 31. A tooth portion (ratchet tooth) 32 is formed at the lower edge of the arc shape.

[0019] Then, on the outside of the back arm 20, the back arm 20 and the upper tooth 3 are provided. 0 and the lower teeth 40 and the base of the inertia weight 50, which will be described later, are held between them. , a holder plate fixed to a first pivot 31 and a second pivot 41 to be described later. 60 are arranged.

[0020] The base of the lower tooth 40 is connected to a second pivot 41 fixed to the base plate 10. The upper tooth 30 is rotatably attached to the upper edge of the free end side of the upper tooth 30. A tooth portion (ratchet pawl) 42 is formed to mesh with the tooth portion 32 of. Also, Roa - The circumferential edge of the shaft attachment part of the tooth 40 is provided with a hole 53 that fits into an elongated hole 53 of an inertia weight 50, which will be described later. A pin 43 is provided.

[0021] The base of the inertia weight 50 is connected to the second pivot shaft, which is the pivot shaft of the lower teeth 40. 41, and its free end side weight portion 52 is attached to the front and rear of the vehicle. It is possible to swing. In addition, a locking portion is provided on the upper edge of the inertia weight 50 on the shaft attachment portion side. A toothed portion 51 is formed as a supplementary part of the back arm 20. It faces the auxiliary tooth portion 21. Further, the above-mentioned An elongated hole 53 into which the pin 43 of the lower tooth 40 fits is provided.

[0022] In the above configuration, normally the inertial weight 50 is in a neutral state, and the inertial weight 50 is in a neutral state. The teeth 51 of the seat 50, the auxiliary teeth 21 of the back arm 20, and the lower tooth 4 The teeth 42 of the upper tooth 30 and the teeth 32 of the upper tooth 30 are not engaged with each other and are free. It is in a hinged state.

[0023] However, in an emergency when the vehicle is subjected to an impact load such as a sudden start or a collision, the backing up At the same time as the arm 20 tries to twist in the direction of arrow A, the inertia weight 50 twists in this direction. is sensed and swings in the direction of arrow a.

[0024] Then, the tooth portion 51 located at the upper edge of this inertia weight 50 rotates in the direction of arrow b. Then, the tooth portion 51 and the auxiliary tooth portion 21 of the back arm 20 mesh with each other.

[0025] Then, due to the torsional rotation of the back arm 20 in the direction of arrow A, the inertia weight 50 is further counterclockwise according to the engagement between the tooth portion 51 and the auxiliary tooth portion 21 of the back arm 20. This rotation causes the lower teeth 40 to be pushed in the direction of arrow d. The teeth 42 of the lower teeth 40 and the teeth 32 of the upper teeth 30 are engaged. The base plate 10 and the back arm 20 must be securely locked. become.

[0026] The amount of movement of the lower tooth 40 in the direction of arrow d at this time is 40 pins 43 abut against the lower end side of the elongated hole 53 of the inertia weight 50. limited.

[0027] Furthermore, when the impact load subsides, the inertia weight 50 returns to the neutral position. With this, the above-mentioned lock is released and the free hinge state shown in the figure is restored again.

[0028] Therefore, according to the above configuration, the inertia weight 50 can be swung or moved in an emergency. In response to the twisting of the back arm 20, the upper edge of the inertia weight (tooth portion 51) The lower edge (auxiliary tooth portion 21) of the back arm 20 meshes with the lower edge of the back arm 20, and then the back arm 20 The teeth 42 of the lower teeth 40 and the teeth of the upper teeth 30 are When the portions 32 engage, the free hinge side of the vehicle seat is instantly locked. Because of this, the locking certainty and reliability are excellent, and the inertia weight 50 is The lower teeth 40 are not operated directly, but the rotation and lowering are caused by the twisting of the back arm 20. By synchronizing the movements of the teeth 40, the lower teeth 40 and the upper teeth 3 Since zero meshing is performed, the weight of the inertia weight 50 can be reduced.

[0029] Figure 2 shows a driver's 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.

[0030] That is, in the vehicle seat shown in FIG. 2, the emergency lock device S2 is normally in the locked position. 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 .

[0031] In an emergency where an impact load occurs such as a sudden start or a collision, the emergency locking device S The inertia weight 50 of No. 2 senses this and moves the lower teeth 40 to the upper teeth 30. In addition to the locking effect of the seat reclining device S1, the seat reclining device The seat S will be reliably locked, ensuring the safety of the passengers. Ru.

[0032]

[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.

[0033] In addition, the inertia weight does not directly operate the lower teeth, but instead relies on the twisting of the back arm. By synchronizing the rotation of the lower teeth with the movement of the lower teeth, the lower teeth and upper teeth are Since the bases are engaged, locking can be achieved reliably, and the inertia way The weight of the vehicle can be reduced.

[0034] 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. , the number of parts and assembly man-hours can be reduced, resulting in weight reduction and cost reduction. It is possible to aim for

[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 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 Auxiliary tooth part 30 Upper Tooth 31 First axis 32 Teeth (ratchet teeth) 40 Lower Tooth 41 Second axis 42 Teeth (ratchet pawl) 43 pin 50 Inertia weight 51 Locking part (tooth part) 52 Weight section 53 Long hole 60 Holder plate

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, an upper tooth that is attached to the back arm, a lower tooth that is pivoted to the base plate so as to be able to engage with the upper tooth, and an inertia weight that is pivotably attached to the base plate. In addition, an auxiliary tooth portion is formed on the lower tooth side of the back arm, and a locking portion that meshes with the auxiliary tooth portion is formed on a portion of the inertia weight that faces the auxiliary tooth portion. emergency seat locking device.