JPH04138350U - Armrest locking mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the armrest from unexpectedly popping out in the event of an impact, regarding a vehicle seat equipped with an armrest that can be pulled out and retracted. [Structure] A lock pin is provided on one side of the recessed inner surface of the seat back or the armrest, and a guide plate is provided on the other side.The guide plate has a guide that guides the relative sliding of the lock pin when the armrest is pulled out or stored. A groove is formed and a pendulum is swingably supported, and an engaging portion that can be engaged with a lock pin is formed on the pendulum. When an impact is applied, the pendulum is swung toward the lock pin and its engaging portion is engaged with the lock pin to prevent the armrest from popping out.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to the locking mechanism of the armrest, especially when the armrest is pulled out and stored. The armrest of a vehicle seat that is equipped so that it can be stowed will pop out due to an impact. It relates to a mechanism that can prevent this.

0002

[Conventional technology]

Recently, various proposals have been made to improve the comfort inside the car interior. ing.

0003 For example, for car seats, there is a forming a recess extending in the direction, and pulling the armrest into the recess around its lower end; ・It pivots so that it can be stored, and when three people are on the rear seat, the armrest can be attached to the seat. It can be stored in the passenger compartment so that three passengers can sit comfortably, while two passengers can be seated comfortably. The armrests can be pulled out to allow passengers to sit in a comfortable position when riding the vehicle. A sheet structure is known.

0004

[Problem that the idea aims to solve]

However, in the conventional seat structure described above, the inner surface of the recess of the seat back and the armrest The armrest is in close contact with the outer surface of the seatback, or the Since I was trying to hold the car in the If there is a collision and impact force is applied to the armrest, the armrest will fly forward. It is said to be cumbersome and undesirable, such as having to put it away and push it back into its original storage state by hand. There was a problem.

[0005] A way to solve this problem is to install a locking mechanism on the armrest. However, in this case, the unlocking operation of the locking mechanism and the area around the armrest should be improved. Due to the limited layout space, how to construct the locking mechanism is important. It is.

[0006] In view of this, this invention prevents the armrest from suddenly popping out during an impact. A simple and compact armrest locking mechanism that reliably prevents The challenge is to provide.

[0007]

[Means to solve the problem]

Therefore, the locking mechanism of the armrest according to the present invention is based on the seat back of the vehicle seat. A recess is formed in the recess that extends in the vertical direction, and the armrest is supported in the lower part of the recess. It is pivoted around an axis so that it can be pulled out and stored, and the inner surface of the recess of the seat back or the arm A lock pin is provided on one side of the mulrest, and a guide plate is provided on the other side. When the armrest is pulled out or stored, the lock pin is placed on the idle plate. A guide groove is formed to guide the slide, and the pendulum is swingably supported. The pendulum is formed with an engaging part that can engage with the lock pin, and when an impact is applied, the pendulum swinging toward the lock pin to engage its engaging portion with the lock pin, The gist is that the armrest is prevented from popping out.

[0008] Here, the pendulum is equipped with a spring member, and operates only with a predetermined impact force or more, and the arm During normal use of the rest, for example when driving uphill or during normal braking, the It is preferable to prevent the generation of abnormal noise due to interference with the lock pin.

[0009]

[Effect]

During normal use of the armrest, the pendulum shall not be subjected to any impact force. Therefore, the engaging part of the pendulum does not engage with the lock pin, and the lock pin does not engage with the guide plate guide plate. The armrest slides while being guided by the id groove, and the armrest smoothly moves around the lower pivot shaft. Rotated and pulled out from the seat back recess or stored in the seat back recess. will be paid.

0010 On the other hand, if an impact force is applied to the armrest due to sudden braking or a collision, the pendulum will The inertia caused by the impact swings toward the lock pin, and the engaging part This locks the lock pin, which prevents rotation of the armrest. will be stopped.

[0011] In this way, in this invention, the pendulum and lock pin are connected only when an impact force is applied. By engaging the armrest to prevent rotation of the armrest, there is no need to worry about complicated unloading. No manual operation is required, and the device has a simple and compact structure, saving layout space. The space can also be small.

0012

【Example】

Hereinafter, the present invention will be explained in detail based on specific examples shown in the drawings. Figures 1 to 5 1 shows an armrest locking mechanism according to an embodiment of the present invention. In the figure, the passenger compartment Driver side seat F1, passenger side seat F2 and rear seat R are arranged on the floor. Each seat F1, F2, R is composed of a seat cushion 3 and a seat back 4. has been completed.

[0013] In the above rear seat R, a recess 40 is provided in the center of the seat back 4 in the upper and lower directions. The armrest 5 is formed to extend in the direction, and the armrest 5 is pulled around the lower end of the recess 40 . The armrest 5 is pivoted so that it can be taken out and stored, and the armrest 5 has a A locking mechanism 6 is provided.

[0014] Here, the structures of the armrest 5 and the lock mechanism 6 will be explained in detail. above arm The rest 5 has a cushion member (for example, urethane foam) and an armrest in the epidermis. The armrest frame 50 is provided with a hinge. A shaft 51 is rotatably supported.

[0015] Further, an armrest bracket 52 is provided on the inner surface of the recess 40 of the seat back 4. is fixed, and the armrest bracket 52 has a semicircular shaft receiving hole 53. is drilled. On the other hand, a detent step 54 is provided at the end of the hinge shaft 51. The end of the hinge shaft 51 is fitted into the shaft receiving hole 53, and the end of the hinge shaft 51 is fitted into the shaft receiving hole 53. A screw 56 is screwed into the end face of the engine shaft 51 with a locking washer 55 interposed therebetween. This causes the armrest 5 to rotate around its lower end hinge shaft 51. Possibly supported.

[0016] On the other hand, in the locking mechanism 6, the armrest frame 50 has a hinge system. A planar L-shaped slide guide plate 60 is fixed above the shaft 51. A guide groove 61 is bored in the slide guide plate 60. The end of the lock pin 62 is inserted so that it can slide up and down, and the lock pin 62 is inserted into the coil. It is elastically supported by the armrest frame 50 by a spring 63. In addition, a lock pin 62 is provided on the armrest 5 eccentrically with respect to the hinge shaft 51. is provided.

[0017] Further, a substantially arc-shaped guide groove 64 is bored in the armrest bracket 52. The end of the lock pin 62 is slidably inserted into the guide groove 64. The relative slide of the lock pin 62 when the armrest 5 is pulled out or stored is planned. It is designed to be internalized. Furthermore, the armrest bracket 52 has a guide groove. A pin hole 65 is bored in the vicinity of the upper end of the pendulum 64. The support pin 68 is inserted through both pin holes 66 and 67, and the support pin 68 is inserted into both the pin holes 66 and 67. An E-ring 69 is fitted into the tip of the pin 68 to prevent it from coming off. A pendulum 66 is swingably supported on the rest bracket 52.

[0018] This pendulum 66 is formed into a substantially C-shape so that its tip can engage with the lock pin 62. When the impact is applied, the pendulum 66 swings toward the lock pin 62 and its engaging portion is locked. armrest bracket 52. A contact 610 is provided in a protruding manner to come into contact with the swinging pendulum 66. In addition, the above support pin A spring 611 is mounted on the outside of the spring 68, and both ends of the spring 611 are attached to the armrest. The strike bracket 52 and the small hole 612 of the pendulum 66 are locked, so that the pendulum 6 6 is designed to swing only when a predetermined impact force is exceeded.

[0019] Next, the effects will be explained.

[0020] In the rear seat R, the armrest 5 is placed in the recess 40 in the center of the seat back 4. When stowed, the seatback 4 of the rear seat R becomes wider, allowing the three passengers to comfortably sit. The armrest 5 can be pulled out from the recess 40 of the seat back 4. When the armrest 5 is rotated forward around the hinge shaft 54, The two occupants are able to maintain a comfortable posture by using the armrest 5. Can be seated.

[0021] During normal use of such an armrest 5, the pendulum 66 of the locking mechanism 6 is biased in the opposite direction to the lock pin 62 by the spring force of the spring 611. Therefore, the pendulum 66 does not engage the lock pin 62 when the armrest 5 is pulled out. The lock pin 62 is suspended from the coil spring 63 and is attached to the slide guide plate. While sliding up and down in the guide groove 61 of the armrest frame 52 The armrest 5 slides in the guide groove 64 (see arrow A in Fig. 4), and the armrest 5 is smoothly moved. be drawn out. Also, the pendulum 66 is caused by the spring force of the spring 611 to cause the lock pin 6 to As a result of being biased in the opposite direction to 2, when driving uphill or during normal braking, The pendulum 66 does not interfere with the lock pin 62, and no abnormal noise occurs during normal driving. Occurrence can be prevented.

[0022] On the other hand, when the armrest 5 is retracted, the vehicle is suddenly braked or When the vehicle body collides with an obstacle and an impact force is applied to the armrest 5, the armrest There is a concern that 5 may pop out unexpectedly (see arrow B in Figure 5), but in this case, the The child 66 moves forward against the spring force of the spring 611 due to the inertia force caused by the impact. (see arrow C in FIG. 5), and when its lower end engaging portion comes into contact with the contact 610. The lock pin 62 is engaged with the lock pin 62 and is eccentric from the hinge shaft 51. As a result, forward rotation of the armrest 5 is prevented, and the armrest 5 is locked. 5 is prevented from jumping out.

[0023] In the armrest locking mechanism of this embodiment as described above, the The pendulum 66 is swung into engagement with the lock pin 62 only when an impact force is applied. Since the armrest 5 is prevented from rotating, the armrest 5 can be prevented from accidentally flying off. This prevents the armrest 5 from coming out and eliminates the trouble of manually pushing the armrest 5 back into its original storage state. Can be erased.

[0024] In addition, the locking mechanism of the armrest 5 is such that the armrest 5 is always locked. However, in this case, each time the armrest 5 is pulled out, Unlocking is required, the operation is very complicated, and the mechanism is complex and large. This makes it difficult to layout in the narrow space around the seat back recess 40. This is a concern. On the other hand, in this locking mechanism, the pendulum 66 is made swingable, The pendulum 66 and the lock pin 62 on the armrest 5 side are engaged only when an impact force is applied. Since it is designed to be locked when the camera is opened, there is no need for complicated unlocking operations, and it is also easy to use. The structure can be made simple and compact, and the layout can be made easy.

[0025]

[Effect of the idea]

As described above, according to the armrest locking mechanism of the present invention, the seatback In a vehicle seat in which an armrest is pivotally supported in a recess so that it can be pulled out and stored, A lock pin is installed on one side of the seatback recess or the armrest, and a guide is installed on the other side. Each guide plate is provided with a Forms a guide groove that guides the relative slide of the lock pin, and also a pendulum. The pendulum is swingably supported, and the pendulum has an engaging portion that can engage with a lock pin to prevent impact. During operation, the pendulum is swung toward the lock pin and its engaging portion is engaged with the lock pin. The armrest is designed to prevent the armrest from popping out, eliminating the troublesome unlocking operation. It is possible to reliably prevent the armrest from unexpectedly popping out in the event of an impact without having to Furthermore, the locking mechanism has a simple and compact structure, allowing it to be laid out in a small space. There is an effect that can be used.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of an automobile seat equipped with an armrest locking mechanism according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a pulled out state of the armrest on the rear seat.

FIG. 3 is an exploded perspective view showing the locking mechanism.

FIG. 4 is a side view showing the locking mechanism.

FIG. 5 is a side view showing the locking state of the locking mechanism.

[Explanation of symbols]

4 Seat back 40 Recess 5 Armrest 51 Hinge shaft 52 Armrest bracket 6 Lock mechanism 62 Hinge pin 64 Guide groove 66 Pendulum

Claims (1)

[Scope of utility model registration request] 1. A recess 40 extending in the vertical direction is formed in a seat back 4 of a vehicle seat, and an armrest 5 is pivotally supported in the recess 40 around a lower pivot shaft 51 so as to be drawable and retractable. A lock pin 62 is provided on one side of the inner surface of the recess 40 of the seat back 4 or the armrest 5, and a guide plate 50 is provided on the other side. A guide groove 64 is formed to guide the relative sliding of the lock pin 62, and a pendulum 66 is swingably supported. When the pendulum 66 acts, the pendulum 66 swings toward the lock pin 62 and its engaging portion engages with the lock pin 62, thereby preventing the arm rest 5 from jumping out. .