JP4345431B2 - Seat with armrest - Google Patents

Description

  The present invention relates to a seat with an armrest provided with a belt reacher mechanism that assists an occupant seated on a seat with an armrest to easily pull out the seatbelt when the seatbelt is worn.

A belt reacher mechanism that assists an occupant seated in a vehicle seat so that the seat belt can be easily attached is disclosed in Reference Document 1 below. This mechanism is configured such that a swing lever having a hook portion engaged with a seat belt at the tip is rotated in the front-rear direction by a drive motor with a vehicle side wall portion as a fulcrum. A vehicle occupant having such a conventional belt reacher mechanism can grip the seat belt pushed out by the swing lever without twisting the body rearward, so that the seat belt can be easily attached.
JP-A-5-147498

  In the above technique, since the swing lever that pivots back and forth with the vehicle side wall portion as a fulcrum is indispensable, it is necessary to secure a rotation space for the swing lever between the vehicle side wall portion and the seat. There is a problem that constrains the design. Moreover, since it is necessary to add a rocking lever as a large component, the vehicle weight also increases. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to configure a belt reacher mechanism using components around a seat.

In order to achieve the above object, the invention according to claim 1 is directed to a seat with an armrest in which an armrest extending forward of a vehicle is attached to a side surface on which at least one end of a seat belt is fixed. A hook member that slidably engages an intermediate portion of the seat belt and guides the front and rear position of the seat belt; and a drive mechanism that moves the hook member back and forth along the armrest. The member has a flexible portion that forms a guide groove for slidably engaging the seat belt by a tensile load applied to the seat belt from a seated occupant during a vehicle collision, and the seat belt is detached from the hook member. opening may have been formed, the opening is formed as an opening shape of the always open state, the seat belt An opening is formed in a direction in which a flexible portion that forms a guide groove when bent from the hook member is bent .

  The invention according to claim 2 is the seat with an armrest described in claim 1, characterized in that the seat belt is stretched so as to be able to be pulled out in the vertical direction in the passenger compartment.

  The invention according to claim 3 is the seat with an armrest described in claim 1 or 2, wherein at least one end of the seat belt is fixed to the seat with the armrest.

According to a fourth aspect of the present invention, in the seat with an armrest according to any one of the first to third aspects, the armrest pivots outward in the left-right direction or upward in the vertical direction around the attachment portion with the seat. It is supported as possible.

  According to the invention of claim 1, it is not necessary to secure a vehicle interior space for the dedicated member by supporting the hook member using the armrest that is a seat component without providing the dedicated member. Further, by partially using the component parts, the vehicle can be reduced in weight and cost can be reduced.

According to the invention of claim 2, even in the shoulder belt and the lap belt that can restrain the occupant's upper body and waist by connecting the tongue to the buckle, the intermediate portion of the seat belt stretched in the vertical direction is used as the armrest. Since the provided belt reacher mechanism guides in the front-rear direction, a so-called three-point seat belt can be easily attached to the occupant. According to the invention according to claim 3, the fixed end of the seat belt can move back and forth together with the seat with the armrest. Therefore, even if the entire seat with the armrest is slid in the front-rear direction after the seat belt is mounted, the relative position of the seat belt with respect to the occupant can be kept constant. In other words, the fit of the seat belt to the occupant can be improved.

  According to the invention which concerns on Claim 4, since an armrest can rotate to the seat outer side or a seat upper part with the intermediate part of a seatbelt, when a passenger | crew gets on and off, a seatbelt does not become obstructive.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The seat of this embodiment is a first-passenger seat of a vehicle provided with three rows of seats in the front and rear of the vehicle. In addition to the headrest 2, the seat pad 7, and the seat frame 10, the seat on the right side is the right side. The armrest 4, the buckle 6, and the left armrest 3 are attached to the seat frame 10 on the left side as viewed from the seated person.

  The seat belt 1 that restrains the passenger is fixed at one end below the left side of the seat frame 10 and is connected at the other end to a retractor 9 disposed above the left side of the seat frame 10. Since the retractor 9 has a generally known seat belt retracting function, it is considered that no gap is generated between the occupant body and the seat belt when the seat belt is mounted.

  The left armrest 3 is in a state in which the outer side of the armrest frame 15 shown in FIG. 5 is covered with a cushion pad (not shown), and the armrest frame 15 has an opening at the bottom, along the longitudinal direction of the armrest 3. It is press-molded into a substantially U-shaped cross-sectional shape. Inside the opening of the armrest frame 15, a screw rod 12 connected to a drive motor 13 fixed to the armrest frame 15 is disposed. A block nut 14 is screwed onto the screw rod 12, and the block nut 14 moves back and forth along the longitudinal direction of the armrest 3 in conjunction with the rotation operation of the drive motor 13.

  As shown in FIG. 5, the intermediate portion of the seat belt 1 is inserted into a guide groove 18 formed in the hook member 8 made of polypropylene resin, and the intermediate portion of the seat belt 1 is guided in the front-rear direction by the hook member 8. The hook member 8 is locked to the block nut 14 via the hanger member 11, and the hook member 8 moves back and forth together with the intermediate portion of the seat belt 1 in conjunction with the rotation operation of the drive motor 13. The tongue 5 is disposed between the hook member 8 and the retractor 9 so as not to be positioned below the left armrest 3.

  The drive motor 13 is controlled to operate in conjunction with a signal from a buckle switch (not shown) provided in a general passenger car to warn of a non-mounted state of the seat belt. Whether or not 5 is connected to the buckle 6 is detected. At the time of connection, the hook member 8 is moved from the front position indicated by the solid line in FIG. 5 to the rear position indicated by the one-dot chain line. If the connection is removed, the hook member 8 moves in the opposite direction.

  On the other hand, the armrest frame 15 is welded and joined to a cast arm member 17 as shown in FIG. 6, and this arm member 17 is connected to the seat frame 10 so as to be rotatable around a pivot shaft 16 extending in the vertical direction. Yes. That is, as shown in FIG. 3, the armrest 3 is pivotally supported around the rotation shaft 16 so as to be able to rotate to the outside of the seat. Note that the arm member 17 can be rotated outwardly in the left-right direction around the rotation shaft 16 by a driving source (not shown) such as a motor attached to the seat frame 10 and whether the vehicle door is open or not. It is also possible to adopt a configuration in which the armrest 3 rotates to the outside of the seat when the door is opened in conjunction with a signal from a courtesy switch (not shown) provided in a general passenger car that detects the above.

  The operation from when the occupant sits on the seat in the state shown in FIG. 1 or 3 until the seat belt 1 is completely attached will be described. Hereinafter, the state in which the hook member 8 is positioned in front of the armrest 3 as shown in FIG. 1 or 3 is referred to as a standby state, and the state in which it is positioned behind the armrest 3 as shown in FIG.

  A passenger seated in the seat in the standby state of FIG. 3 pulls the left armrest 3 inward of the vehicle, or the left armrest 3 is automatically pulled inward of the vehicle by a driving source such as the motor described above, thereby waiting in FIG. A state is formed.

  In this state, the occupant grasps the tongue 5 and connects the tongue 5 to the buckle 6 disposed on the right side of the seat. At this time, the tongue 5 is guided in front of the armrest by the hook member 8, and the occupant can easily grasp the tongue 5 with the left hand without twisting the body backward. Next, when the tongue 5 is connected to the buckle 6, the drive motor 13 moves the hook member 8 from the front position indicated by the solid line in FIG. 5 to the rear position indicated by the one-dot chain line. Accordingly, the retractable length of the seat belt 1 is adjusted by the retractor 9, and the seat belt 1 is guided to the use state shown in FIG. 4, and the clearance between the seat belt 1 and the occupant (not shown) is the same as that of the conventional vehicle seat. The state is formed.

  The hook member 8 has an opening 19 as shown in FIG. 5 below the guide groove 18 and is designed to be easily deformed. Specifically, when a large tensile load is applied to the seat belt 1, the flexible portion 20 of the hook member 8 is bent downward so that the seat belt 1 is easily detached from the hook member 8. Care is taken not to impair passenger restraint performance.

  When the occupant removes the seat belt and gets off the vehicle, the drive motor 13 is linked to a signal from a buckle switch (not shown) that detects whether the seat belt is not attached when the tongue 5 is removed from the buckle 6 as before. The direction of FIG. 1 is formed. Then, the armrest 3 is pushed open around the rotation shaft 16 to the outside of the seat, and gets off. Further, the extra seat belt 1 is wound around the retractor 9 so that there is no slack.

  In addition, the hanger 11, the screw rod 12, the drive motor 13, and the block nut 14 in the above-described embodiment correspond to the drive mechanism in the present invention.

  Although one embodiment of the present invention has been described above, the present invention is not limited to this, and various modes shown in the following 1) to 4) are possible. For example, 1) It is also possible to link the armrest 3 to the upper side of the seat so that the pivot shaft 16 is connected to the seat frame 10 with the seat 16 extending in the left-right direction. If necessary, it is possible to improve the boarding / alighting property by rotating the armrest to the upper side of the seat when the door is opened in conjunction with a signal from a courtesy switch (not shown). 2) The present invention is applied to a known form in which the seat frame 10 and the seat pad 7 are divided into a backrest part and a bottom part. 3) Applicable to so-called two-point seat belts where there is no shoulder belt that restrains the upper body of the occupant and only a lap belt that restrains only the waist. In this case, the hook member 8 is engaged with the intermediate portion of the seat belt 1 located between the retractor 9 and the tongue 5. 4) Applies to a so-called four-point seat belt in which seat belts are stretched vertically on both the left and right sides. In this case, the same buckle and armrest with a belt reacher mechanism as those described above are disposed on both the left and right sides of the seat.

It is a perspective view which shows one Embodiment of this invention. It is the side view which looked at FIG. 1 from the vehicle outer side. It is a perspective view which shows the state different from FIG. 1 by embodiment similar to FIG. It is a side view similar to FIG. 2 which shows a state different from FIG. It is a side view which shows the component of the left armrest in embodiment similar to FIG. FIG. 6 is a plan view of FIG. 5 viewed from above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat belt 2 Headrest 5 Tongue 6 Buckle 7 Seat pad 8 Hook member 9 Retractor 10 Seat frame 11 Hanger 12 Screw rod 13 Drive motor 14 Block nut 15 Armrest frame 17 Arm member

Claims (4)

In a seat with an armrest in which an armrest extending forward of the vehicle is attached to a side surface on which at least one end of the seat belt is fixed,
The armrest is a hook member that slidably engages an intermediate portion of the seat belt and guides the front-rear position of the seat belt;
A drive mechanism for moving the hook member back and forth along the armrest,
In the hook member, a flexible portion that forms a guide groove for slidably engaging the seat belt is deflected by a tensile load applied to the seat belt from a seated occupant at the time of a vehicle collision, and the seat belt is detached from the hook member. An opening that can be
The opening is formed as an opening shape that is always open, and the opening is formed in a direction in which the flexible portion forming the guide groove bends when the seat belt is detached from the hook member . A seat with an armrest characterized by.   The seat with an armrest according to claim 1, wherein the seatbelt is stretched so as to be able to be pulled out in a vertical direction in a vehicle interior.   The seat with an armrest according to claim 1 or 2, wherein at least one end of the seat belt is fixed to the seat with the armrest. The seat with an armrest according to any one of claims 1 to 3, wherein the armrest is supported so as to be pivotable outward in the left-right direction or upward in the up-down direction centering on a mounting portion with the seat. Characteristic seat with armrest.

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