JPH04115443U - 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. An emergency locking device is provided, which includes a lower tooth 40 attached to the upper tooth 30, a locking member 50 that allows the lower tooth 40 to be freely engaged and detached from the upper tooth 30, and an inertia weight 60 attached to the locking member 50.

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. As an inning device, there are teeth formed on the upper teeth and teeth formed on the lower teeth. The angular posture of the seat back is kept constant by engaging with the lower tooth teeth. By changing the engagement position of the upper teeth of the seat back A latch mechanism type stepped adjustment device that allows you to change the angular posture of the seat back. The seat back is moved by the meshing of gears placed at the pivot point between the seat cushion and the seat cushion. The angular posture of the seat back can be adjusted by keeping the angular posture constant and rotating the gear. Taumel mechanism stepless adjustment device for fine adjustment, and combination of these two types devices are known, but these are so-called single-piece devices that are attached only to one side of the seat. Since it is a seat reclining device, it is particularly susceptible to 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, there were concerns about the safety of the passengers.

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 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.

[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. A lower tooth is pivoted to the base plate so that the lower tooth can be connected to the base plate. A locking member that can be freely engaged and detached from the upper tooth, and an inertia attached to this locking member. It is characterized by having a weight.

[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 locking member engages the lower teeth with the upper teeth in conjunction with the movement of the eight. Ru.

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 vehicle seat emergency locking device of this invention Since there is no need to link the reclining device and the emergency locking device on the other side, The number of parts and assembly man-hours can be reduced, resulting in lower weight and cost. It is possible to aim for

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 view showing the first embodiment of the vehicle seat emergency locking device of this invention. Figures 2 and 2 are schematic perspective views showing examples of the use of the vehicle seat emergency locking device of this invention. 3 is a front view showing a second embodiment of the vehicle seat emergency locking device of this invention. The explanatory diagram, FIG. 4, is also a front explanatory diagram showing the third embodiment.

[0014] In the first embodiment shown in FIG. 1, S2 is installed on the free hinge side of the vehicle seat. This emergency locking device S2 is attached to the base plate 10. A back arm 20 that is pivoted and an upper tool attached to this back arm 20. A shaft is attached to the base plate 10 so as to be able to engage with the upper tooth 30. The lower teeth 40 are attached to the upper teeth 20, and the lower teeth 40 are attached to the upper teeth 20. A locking member 50 that can be freely engaged and detached from the locking member 50, and an inertia weight 6 attached to the locking member 50. It is composed of 0.

[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 upper teeth 30 are inserted into the first pivot 31 by inserting their center portions into the pins. 33 is integrally attached to the lower part of the back arm 20, and the first pivot 3 A tooth portion (ratchet tooth) 32 is formed on the lower edge of the circular arc centered on the axis of 1. ing.

[0017] Then, on the outside of the back arm 20, the back arm 20 and the upper tooth 3 are provided. 0 and the first pivot so as to sandwich the lower tooth 40 and the locking member 50, which will be described later. A holder plate fixed to the shaft 31, a second pivot 41, and a third pivot 51, which will be described later. Rate 70 is arranged.

[0018] 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 - On the lower edge of the free end side of the tooth 40, there is a recess 44 and a front protrusion 4 sandwiching the recess 44. 3 and a rear convex portion 45 are formed.

[0019] The base of the locking member 50 rotates around a third pivot 51 fixed to the base plate 10. It is movably pivoted, and an inertia weight 60 is integrally attached to its free end. It is being Further, a cam portion 52 is formed on the upper edge of the locking member 50 on the shaft attachment portion side. This cam portion 52 faces the cam surfaces 43, 44, 45 of the lower tooth 40. are doing.

[0020] In the above configuration, normally the inertia weight 60 is in a neutral state, and this inertia weight 60 is in a neutral state. The cam portion 52 of the locking member 50 integrated with the weight 60 is connected to the protrusion of the lower teeth 40. By lightly abutting both the parts 43 and 45, the tooth part of the lower tooth 40 42 is not engaged with the teeth 32 of the upper tooth 30 and is in a free hinge state. It has become.

[0021] However, in an emergency when a vehicle is subjected to an impact load such as a sudden start or a collision, the first thing to do is to The gender weight 60 senses this and swings back and forth (arrows A and B).

[0022] Then, the locking member 50 integrated with the inertia weight 60 also moves to the third pivot. Since the cam portion 52 rotates in the front and back direction around the shaft 51, the cam portion 52 is connected to the convex portion of the lower tooth 40. 43 and push the lower tooth 40 upwards, this lower tooth 40 Since the teeth 42 of the upper tooth 30 are engaged with the teeth 32 of the upper tooth 30, the base plate The seat 10 and the back arm 20 are reliably locked.

[0023] In addition, as the impact load subsides and the inertia weight 60 returns to the neutral position, the above-mentioned is unlocked and returns to the free hinge state shown in the figure.

[0024] Therefore, according to the above configuration, the swing of the inertia weight 60 causes the vehicle seat to The free hinge side of the seat is instantly locked, effectively ensuring the safety of the occupants. can be done.

[0025] 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.

[0026] 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 .

[0027] In an emergency where an impact load occurs such as a sudden start or a collision, the emergency locking device S The inertia weight 60 of No. 2 senses this and operates the locking member 50 to lock the lower In order to engage the teeth 40 with the upper teeth 30, the seat reclining device S Combined with the locking effect in step 1, the seat S will be reliably locked, improving the safety of the occupants. will be ensured.

[0028] Next, the second embodiment shown in FIG. An example is shown in which the locking effect in an emergency is further ensured by adding a function.

[0029] That is, in FIG. 3, the swing arm 80 has a base that is connected to the upper teeth 30. and the back arm 20 are rotatably attached to the first pivot 31, and A pin 81 is provided protruding from the far end side.

[0030] The pin 81 of the swing arm 80 is normally connected to the lower teeth 4. 0 and the cam portion 52 of the locking member 50.

[0031] Here, the inertia weight 60 senses the impact load, and for example, the inertia weight 60 When rocking in the direction of mark A, the cam portion 52 of the locking member 50 moves in the direction of arrow B, and at the same time By moving the pin 81 in the direction of arrow B, the swing arm 80 moves in the direction of arrow B. rotate in the direction.

[0032] Then, the pin 81 of the swing arm 80 protrudes from the recess 44 of the lower tooth 40. 43 side and the lower tooth 40 is pushed up in the direction of arrow C. Then, the teeth 42 of the lower teeth 40 and the teeth 32 of the upper teeth 30 mesh, and the This locks the call back.

[0033] Therefore, according to the second embodiment, the action of the swing arm 80 and the pin 81 is Therefore, the engagement between the lower teeth 40 and the upper teeth 30 is made more reliable. This makes it possible to further improve the reliability of emergency locking.

[0034] Further, in the third embodiment shown in FIG. 4, the back arm 20 has a role of upper teeth. This shows an embodiment in which further weight reduction is achieved by combining the two functions.

[0035] That is, in the third embodiment shown in FIG. By forming the tooth portion 22, the use of upper teeth is omitted, and the locking portion The difference from the first embodiment is that a return spring 90 is attached to the material 50. There is.

[0036] According to the third embodiment, the locking member 50 is moved to the lower position by the swinging of the inertia weight 60. The tooth 40 is pushed up and the lower tooth 40 engages with the teeth 22 to close the seat. The back is locked, and the inertial force is removed by the action of the return spring 90. The lock is released when the weight 60 returns to the neutral position.

[0037]

[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.

[0038] In addition, the vehicle seat emergency locking device of this invention Since there is no need to link the reclining device and the emergency locking device on the other side, The number of parts and assembly man-hours can be reduced, resulting in lower weight and cost. It is possible to aim for

[Brief explanation of drawings]

FIG. 1 is an explanatory front view showing a first embodiment of the emergency locking device for a vehicle seat 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.

FIG. 3 is an explanatory front view showing a second embodiment of the vehicle seat emergency locking device of this invention.

FIG. 4 is an explanatory front view showing a third embodiment of the vehicle seat emergency locking device of this invention.

[Explanation of symbols]

10 Base plate 20 Back arm 30 Upper Tooth 31 First axis 32 Teeth (ratchet teeth) 33 pin 40 Lower Tooth 41 Second axis 42 Teeth (ratchet pawl) 43 Convex part (cam surface) 44 Recess (cam surface) 45 Convex part (cam surface) 50 Locking member 51 Third axis 52 Cam part 60 Inertia weight 70 Holder plate 80 swing arm 81 pin 90 Return spring 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 provided with a seat reclining device for freely adjusting the inclination angle; 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 a lock that allows the lower tooth to be detachably connected to the upper tooth. An emergency locking device for a vehicle seat, comprising: a member; and an inertia weight attached to the locking member.