JP2016107754A - Seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat for a vehicle including a seat belt which is easily worn, achieves less oppressive feeling, and safely restrains the upper body of an occupant.SOLUTION: The seat for a vehicle includes: a seat cushion serving as a seating surface part of the seat; and a seat back provided at the back side of the seat cushion and serving as a backrest part of the seat. The seat for the vehicle includes: a first seat belt configured to restrain a part of an occupant which is located around a lumbar part when worn; and a second seat belt which is movable in a vertical direction of the seat back along slide rails provided at both sides of the seat back.SELECTED DRAWING: Figure 1A

Description

  The present invention relates to a vehicle seat, and more particularly to a seat belt for a vehicle seat.

  Vehicle seats such as automobile seats are required to have various functions such as safety, holdability and ease of getting on and off (ease of getting on and off), and at the same time there are many demands for improving passenger comfort such as sitting comfort and vibration absorption performance .

  2. Description of the Related Art A vehicle seat, particularly an automobile seat, is generally provided with a seat belt for restraining and protecting an occupant to the seat in the event of a vehicle collision. Various types of seat belts have been developed in order to achieve both safety and comfort at the time of wearing, and in current automobile seats, it consists of a waist belt and a shoulder belt straddling the waist from one shoulder to the other. A three-point seat belt or a four-point seat belt composed of a waist belt and two shoulder belts straddling both shoulders to the waist is the mainstream.

  As a background art in this technical field, for example, there is a technique such as Japanese Patent Application Laid-Open No. 2007-191107 (Patent Document 1). Patent Document 1 states that “a first retractor provided on one side in the seat width direction, a first belt extending from the first retractor and extending in the seat vertical direction on the one side, and the one side” A second retractor provided on the opposite other side, a second belt extending from the second retractor and extending in the seat vertical direction on the other side, and a first movable along the first belt. Coupling means, a second coupling means attached to the second belt and connectable to the first coupling means, and a support member provided on the other side for positioning and supporting the second coupling means And a seat belt device comprising:

  According to the above-described seat belt device, a four-point seat belt device that can be mounted with one hand can be provided.

  Japanese Patent Laid-Open No. 2009-154745 (Patent Document 2) states that “a pair of webbings that extend in the vehicle vertical direction at both ends in the width direction of the seat back and restrain the seated person, and the pair of webbings” A webbing length adjusting unit capable of adjusting a mounting length to be mounted on a seated person, a coupling unit for releasably coupling intermediate portions in the longitudinal direction of the pair of webbings, and a width direction of the seat back Each webbing guide portion is provided on the upper side in the vehicle vertical direction with respect to both end sides, and one end side in the longitudinal direction of the webbing is locked or wound, and each webbing guide portion is above the shoulder of the seated person A first position located outside the shoulder width of the seated person, and the webbing guide is within the shoulder width of the seated person and the shoulder of the seated person A pair of shoulder webbing guides that can take a second position positioned forward in the vehicle front-rear direction, and the pair of shoulder webbing guides in the non-sitting state are positioned at the first positions, respectively, A vehicle seat belt device including a guide driving means for positioning the shoulder webbing guide at the second position is disclosed.

  According to the vehicle seat belt device, the webbing can be easily attached to and detached from the occupant.

JP 2007-191107 A JP 2009-154745 A

  As described above, in a seat belt for a vehicle seat such as an automobile seat, there is a demand for a seat belt structure that secures its safety and has less feeling of pressure when worn.

  With a two-point seat belt composed of a waist belt, the upper body of the occupant cannot be restrained, and it is difficult to ensure safety during a collision. In the three-point seat belt as described above, a left-right difference occurs in restraining the upper body. The four-point seat belt takes more time and effort than the three-point seat. Further, in the conventional three-point seat belt and the four-point seat belt, the shoulder portion has a feeling of pressure.

  In any of the four-point seat belts of Patent Document 1 or Patent Document 2, the effort at the time of wearing is the same as that of the conventional three-point seat belt, but it is difficult to eliminate the feeling of pressure on the shoulder.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle seat provided with a seat belt that is easy to mount, has little feeling of pressure, and can safely restrain the upper body of an occupant.

  The present invention is a vehicle seat having a seat cushion that serves as a seat surface portion of a seat, and a seat back that is provided on the back side of the seat cushion and serves as a seat back portion, the vehicle seat being mounted A first seat belt that sometimes restrains the vicinity of the waist of the occupant, and a second seat belt that is movable in the vertical direction of the seat back along slide rails provided on both sides of the seat back. The first seat belt and the second seat belt at the time of wearing are located in the vicinity of a waist part where the wearing is easy, and the second seat belt is raised only when a danger of collision is detected. To do.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle seat provided with the seatbelt which is easy to mount | wear, there is little feeling of pressure, and can restrain a passenger | crew's upper body safely can be implement | achieved.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a figure showing the whole vehicular seat outline concerning one embodiment of the present invention. It is a figure showing the whole vehicular seat outline concerning one embodiment of the present invention. It is a front view of the vehicular seat concerning one embodiment of the present invention. It is a side view of the vehicular seat concerning one embodiment of the present invention. It is a side view of the vehicular seat concerning one embodiment of the present invention. It is the A section enlarged view in FIG. 2C. It is a front view of the vehicular seat concerning one embodiment of the present invention. It is a side view of the vehicular seat concerning one embodiment of the present invention. It is a side view of the vehicular seat concerning one embodiment of the present invention. It is a front view of the vehicular seat concerning one embodiment of the present invention. It is a side view of the vehicular seat concerning one embodiment of the present invention. It is a side view of the vehicular seat concerning one embodiment of the present invention. It is a figure showing the whole vehicular seat outline concerning one embodiment of the present invention. It is a flowchart which shows operation | movement of the seatbelt of the vehicle seat which concerns on one Embodiment of this invention. It is a flowchart which shows operation | movement of the seatbelt of the vehicle seat which concerns on one Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  1A and 1B show an overall outline of a vehicle seat used in an automobile or the like which is an embodiment of the present invention. FIG. 1A shows a state immediately after an occupant wears a seat belt provided on a vehicle seat, and FIG. 1B shows a state where the seat belt is operated.

  As shown in FIG. 1A or 1B, the vehicle seat 1 according to the first embodiment is provided on the back side of the seat cushion 2 and the seat cushion 2 as a seating surface portion of the seat as a main portion thereof, and the seat backrest portion. And a headrest 4 that protects the head and neck of the occupant. On both sides of the seat cushion 2, side supports 5 are provided to support the side portions of the seat surface portion. A reclining mechanism is provided at the connecting portion of the seat cushion 2 and the seat back 3 so that the angle of the seat back 3 with respect to the seat cushion 2 can be adjusted.

  The seat back 3 is provided with a seat belt A6 and a seat belt B7 that restrain the occupant when the vehicle collides across the width direction. Immediately after the occupant sits on the vehicle seat 1 and wears the seat belt, as shown in FIG. 1A, both the seat belt A6 and the seat belt B7 are located in the vicinity of the waist of the occupant.

  Thereafter, as shown in FIG. 1B, the upper seat belt, that is, the seat belt B7 moves to the upper side of the seat back 3 and restrains the vicinity of the chest of the occupant. When the seat belt B7 moves upward, the seat belt B7 moves between both sides of the occupant and both arms. Therefore, the occupant's arms are positioned outside the seat belt B7 and are not restrained by the seat belt B7.

  Next, a more specific configuration of the vehicle seat 1 in the present embodiment will be described with reference to FIGS. 2A to 2D. 2A shows a front view of the vehicle seat 1, and FIGS. 2B and 2C show a right side view and a left side view of the vehicle seat 1, respectively. FIG. 2D is an enlarged view of a portion A in FIG. 2C. 2A to 2D show the state of the vehicle seat 1 in a state where no occupant is seated and no seat belt is attached.

  As shown in FIGS. 2A and 2B, a buckle A <b> 8 and a buckle B <b> 9 are provided on the right side surface of the seat back 3. The buckle A8 is provided directly on the seat back 3, and the buckle B9 is provided so as to be movable in the vertical direction of the seat back 3 via a slide rail 14 provided on the side surface of the seat back 3. Note that the buckle A8 and the buckle B9 have a rotatable structure so that the angle can be arbitrarily changed when the seat belt is worn.

  Further, as shown in FIGS. 2A and 2C, a retractor A10 and a retractor B11 are provided on the left side surface of the seat back 3 vertically. The retractor A10 is provided directly on the seat back 3, and the retractor B11 is provided so as to be movable in the vertical direction of the seat back 3 via a slide rail 14 provided on a side surface of the seat back 3. The retractor A10 and the retractor B11 are configured to be rotatable so that the angle can be arbitrarily changed when the seat belt is mounted.

  In the retractor A10, the belt of the seat belt A6, that is, the webbing is wound and stored. A tongue A15 is provided at the end of the belt, that is, the webbing, and engages with the buckle A8 when the seat belt is worn. In the retractor B11, the belt of the seat belt B7, that is, the webbing is wound and stored. A tongue B16 is provided at the end of the belt, that is, the webbing, and engages with the buckle B9 when the seat belt is worn.

  3A to 3C show a state immediately after the occupant is seated on the vehicle seat shown in FIGS. 2A to 2D and the seat belt is attached. 3A shows a front view of the vehicle seat 1, and FIGS. 3B and 3C show a right side view and a left side view of the vehicle seat 1, respectively. It should be noted that an occupant is omitted for easy understanding of the configuration of the vehicle seat and the seat belt.

  As shown in FIGS. 3A to 3C, immediately after the seat belt is mounted, that is, immediately after the tongue A15 of the seat belt A6 and the tongue B16 of the seat belt B7 are engaged (attached) to the buckle A8 and the buckle B9, respectively. The seat belt A6 and the seat belt B7 are both located near the occupant's waist. As described above, the buckle A8, the buckle B9, the retractor A10, and the retractor B11 are all provided to the seat back 3 directly or via the slide rail 14 so that the angle thereof depends on the physique of the occupant. Is variable.

  As shown in FIG. 3A, a shaft 12 is provided so as to straddle slide rails 14 provided on both sides of the seat back 3, and a motor 13 is provided on one of them. The upper seat belt, that is, the seat belt B7 is structured to be movable in the vertical direction of the seat back 3 along the slide rail 14 by the driving force of the motor 13, that is, electrically.

  4A to 4C show a state in which the seat belt is operated. 4A shows a front view of the vehicle seat 1, and FIGS. 4B and 4C show a right side view and a left side view of the vehicle seat 1, respectively. Note that the occupant is not shown in the same manner as in FIGS. 3A to 3C.

  As described above, when the seat belt is operated, the upper seat belt, that is, the seat belt B7 is electrically moved by the motor 13 and moved above the seat back 3, and is positioned near the chest of the occupant.

  It should be noted that the belt portion of the seat belt, that is, the webbing, in particular, the material of the seat belt B7 includes a shape memory material such as a thin spring material or a metal fiber so as to maintain a loop state, so A gap is formed, and the seat belt can be smoothly moved upward.

  Further, as shown in FIGS. 4A to 4C, when the upper seat belt, that is, the seat belt B7 is positioned in the vicinity of the chest of the occupant, it is possible to suppress the feeling of pressure on the occupant's chest by the belt, that is, the webbing. .

  As described above, according to the vehicle seat of the present embodiment, the occupant's body can be evenly restrained from the left and right without increasing the occupant's effort.

  In FIG. 2D, the tongue A15 and the tongue B16 may be detachably coupled to each other by a magnet (magnet) 17. Thus, when the seat belt is mounted, the tongue A15 and the tongue B16 can be simultaneously inserted into the buckle A8 and the buckle B9, so that two seat belts can be simultaneously mounted in one operation.

  A vehicle seat 1 in Embodiment 2 of the present invention will be described with reference to FIG. Description of parts common to the vehicle seat described in the first embodiment is omitted.

  The vehicle seat 1 in the present embodiment is different from that in the first embodiment in that the operation of the seat belt described in the first embodiment is controlled by signals detected by various sensors.

  After the occupant sits on the vehicle seat 1 and wears the seat belt, the upper seat belt, that is, the seat belt B7 moves along the slide rail 14 above the seat back 3, and this operation is performed by various sensors. Control.

  For example, a sensor that detects that a tongue has been inserted into the buckle is provided in these sensors, and when the insertion of the tongue is detected, the seat belt B7 starts to move upward.

  In addition, a sensor that detects the risk of collision is provided in the vehicle on which the vehicle seat 1 is mounted, and is used as a two-point seat belt that restrains the occupant's waist during normal times. The seat belt B7 starts to move up. As a result, the seat belt B7 can be raised and the safety of the occupant can be improved when the danger of a collision is detected without obstructing the occupant's operation during normal times (normal times).

  Furthermore, a physique detection sensor that detects the occupant's physique is provided in the vehicle or the vehicle seat 1, and when the occupant is seated, physique information such as the occupant's sitting height, height, and weight is acquired, and the physique information thereof. Is transmitted to an ECU (Electronic-Control-Unit) to calculate an appropriate position of the seat belt B7, that is, a position where the seat belt B7 is raised and stopped in the ECU, and controls its operation.

  FIG. 6 and FIG. 7 show flowcharts of seat belt control by the various sensors described above.

  As shown in FIG. 6, when the occupant sits on the vehicle seat 1, it is determined whether or not the seat belt tongue is inserted into the buckle. When it is determined that the tongue has been inserted into the buckle, the occupant's physique information is acquired by the occupant's physique detection means, and the appropriate position of the seat belt B7 is calculated in the ECU based thereon. The upper seat belt B7, that is, the retractor B11, the buckle B9, and the tongue B16 are moved to the calculated appropriate position.

  Here, as shown in FIG. 6, it may be possible to detect and control only the presence / absence of tongue insertion into the buckle without providing the occupant's physique detection means.

  In addition, as shown in FIG. 7, when a signal of a collision risk detection sensor for detecting a collision risk provided in a vehicle on which the vehicle seat 1 is mounted is detected, the upper seat belt B7, that is, the retractor B11, The buckle B9 and the tongue B16 are moved above the seat back 3.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle seat, 2 ... Seat cushion, 3 ... Seat back, 4 ... Headrest, 5 ... Side support, 6 ... Seat belt A, 7 ... Seat belt B, 8 ... Buckle A, 9 ... Buckle B, 10 ... Retractor A , 11 ... retractor B, 12 ... shaft, 13 ... motor, 14 ... slide rail, 15 ... tongue A, 16 ... tongue B, 17 ... magnet.

Claims (7)

A seat cushion to be a seat surface portion of the seat;
A vehicle seat having a seat back provided on a back side of the seat cushion and serving as a seat back portion;
The vehicle seat includes a first seat belt that restrains the vicinity of the waist of an occupant when worn;
A vehicle seat comprising: a second seat belt that is movable in a vertical direction of the seat back along slide rails provided on both sides of the seat back.   The vehicle seat according to claim 1, wherein the second seat belt moves in a vertical direction of the seat back by driving a motor.   The second seat belt moves upward along the slide rail when the second seat belt detects that the tongue of the second seat belt is inserted into the buckle of the second seat belt. The vehicular seat according to claim 1 or 2 characterized by things.   The vehicle seat according to claim 3, wherein the second seat belt moves to a position corresponding to a physique of an occupant detected by a physique detection unit provided on the vehicle or the vehicle seat.   The second seat belt moves upward along the slide rail in the seat back direction when a collision risk of the vehicle is detected by a collision risk detection unit provided in the vehicle. Item 5. The vehicle seat according to any one of Items 1 to 4.   6. The vehicle seat according to claim 1, wherein the tongue of the first seat belt and the tongue of the second seat belt are detachably provided by a magnet.   7. The webbing of the second seat belt is formed including a shape memory material, and a gap is generated between the seat belt and an occupant when the seat belt is worn. The vehicle seat according to any one of the above.

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