JP5501284B2 - Seat belt device and vehicle seat - Google Patents

Description

The present invention relates to a seat belt device for protecting an occupant seated on a vehicle seat, and more particularly to a three-point seat belt device and a vehicle seat.
About.

  In recent years, vehicle seats have various needs such as ensuring interior variations and adapting to special uses (for example, campers).

  On the other hand, in order to further improve occupant protection, for example, when it is possible to seat three occupants in a row, the occupants on both sides of the vehicle are pulled out from the vicinity of the vehicle body floor surface and the vehicle body pillars, etc. The passenger can be restrained as a so-called three-point seat belt by pulling the midway part of the seat belt webbing to a buckle disposed on a seat cushion or the like on the opposite side of the passenger.

  On the other hand, the occupant seated in the center of the vehicle width has no body pillars, so when using the three-point seat belt method, install a shoulder anchor near the upper end of the seat back and pull out the seat belt webbing. (For example, refer to Patent Document 1).

  Various seat belt structures have been proposed in which a lap anchor is detachably attached to the side surface of the seat so as not to obstruct the seat belt when not in use (see, for example, Patent Document 2).

JP 2008-143279 A JP 2001-187559 A

  However, in the case of the above-mentioned camper car seats, it is considered that all seats are flat to replace the bed, but if the seat belt at the center of the vehicle width is a three-point system, the shoulder anchor Has become a hindrance, and there has been a problem that the flat state cannot be achieved or a gap is formed between the seat cushion on the rear seat side.

  Even when the lap anchor is detachably attached to the side surface of the seat, no consideration is given to the passenger at the center of the vehicle width. As a result, the seat belt device at the center of the vehicle width is a two-point type or a shoulder. In order to use a three-point system using an anchor and to make a bed using a flat sheet such as the camper described above, the above-described problems could not be solved.

  The object of the present invention is to generate a gap depending on only the seat shape and structure, without causing a gap between adjacent sheets by components constituting the seat belt device when the seat back is tilted to a flat sheet. An object of the present invention is to provide a seat belt device and a vehicle seat that can suppress the above-described problem.

  In order to achieve the above object, a seat belt device according to a first aspect of the present invention includes a tongue insertion port that opens on a laterally upper surface of a seat back of a vehicle seat, and a seat back device that is disposed on the back side of the tongue insertion port. A first buckle fixed to the first buckle, and a second buckle provided so as to be able to protrude from between the seat cushion of the vehicle seat and the seat back so as to be positioned substantially below the first buckle; A third buckle provided on the upper surface of the seat cushion opposite to the second buckle is detachably engaged with the first buckle, and a first end of the seat belt webbing is pulled out. A first tongue, a second tongue detachably engaged with the second buckle and held at the other end of the seat belt webbing, and the third buckle Characterized in that it comprises a third tongue which is movable in the seat belt webbing between said first tongue and said second tongue with removably engaged.

  In the first invention of the present application, regardless of the position of the vehicle seat in the vehicle width direction, it is possible to restrain the occupant as a three-point seat belt device, and when the seat back is tilted into a flat seat, All the tongues and buckles can be eliminated from the upper surface of the seat by separating the tongues from all the buckles, and the seat shape and structure can be obtained without generating a gap between adjacent seats by the components constituting the seat belt device. It is possible to prevent the generation of a gap depending only on the above.

  The seat belt device according to a second aspect of the present invention is the seat belt device according to claim 1, wherein the third buckle can be projected and retracted between the seat cushion and the seat back or between adjacent seat cushions. It is characterized by.

  In the second invention of the present application, the occupant can be restrained as a three-point seat belt device regardless of the position of the vehicle seat or the like.

  A seat belt device according to a third aspect of the present invention is the seat belt device according to claim 1, wherein the tongue insertion port is disposed on a laterally upper surface of the seat back, and the second buckle is directly below the tongue insertion port. It is possible to move in and out from between the seat cushion and the seat back.

  In the third invention of the present application, it is possible to suppress the twisting of the seat belt webbing between the first tongue and the second tongue.

  A seat belt device according to a fourth aspect of the present invention is the seat belt device according to any one of claims 1 to 3, wherein the second buckle and the third buckle are fixed to a seat frame below the seat cushion. It is characterized by being.

  In the fourth invention of the present application, the second buckle and the third buckle can be caused to follow when the vehicle seat is slid and displaced in the longitudinal direction of the vehicle body.

  A seat belt device according to a fifth aspect of the present invention is the seat belt device according to any one of claims 1 to 4, wherein the seat belt retractor device that winds up one end side of the seat belt webbing is below the lower end of the seat back. The first tongue is provided with a belt anchor portion that guides one end of the seat belt webbing pulled out from the seat belt retractor device to the front side of the seat back.

  In the fifth invention of the present application, when the seat back is tilted and flattened, the seat belt retractor device is not obstructed, and all the anchors and seat belt webbing removed from all the buckles are placed below the vehicle seat. Can be stored together.

  The seat belt device according to a sixth aspect of the present invention is the seat belt device according to claim 5, wherein the tongue insertion port is disposed on a laterally upper surface of the seat back, and the seat belt retractor device is located immediately below the tongue insertion port. The seat back is fixed to a seat frame or a floor near the lower end of the seat back.

  According to the sixth aspect of the present invention, it is possible to suppress occurrence of twist of the seat belt webbing between the seat belt retractor device and the first tongue.

  A seat belt device according to a seventh aspect of the present invention is the seat belt device according to any one of claims 1 to 4, wherein a seat belt retractor device that winds up one end side of the seat belt webbing is fixed to the first tongue. It is characterized by.

  In the seventh invention of the present application, the seat belt webbing can be pulled out with the shortest distance.

  The seat belt device according to an eighth aspect of the present invention is the seat belt device according to claim 7, wherein a power supply cable drawn from the vehicle body side is connected to the seat belt retractor device.

  According to the eighth aspect of the present invention, the seat belt retractor device can be provided with an electronic control function.

  The vehicle seat of the ninth aspect of the invention can be a vehicle seat provided with the seat belt device according to any one of claims 1 to 8.

  According to the seat belt device and the vehicle seat of the present invention, when the seat back is tilted into a flat seat, the seat shape and structure are generated without generating a gap between adjacent seats by the components constituting the seat belt device. It is possible to suppress the generation of a gap depending only on

1 is a schematic side view of an entire vehicle body in a normal state of a vehicle seat according to a first embodiment of a seat belt device of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view of an entire vehicle body when a vehicle seat according to a first embodiment of a seat belt device of the present invention is flat. 1 is a perspective view of a vehicle seat when the vehicle seat according to the first embodiment of the seat belt device of the present invention is in a normal state. It is a mimetic diagram of a vehicular seat at the time of normal times of a vehicular seat concerning a 1st embodiment of a seat belt device of the present invention. It is a perspective view of the whole vehicle seat at the time of the normal time of the vehicle seat which concerns on 1st Embodiment of the seatbelt apparatus of this invention. It is a perspective view of the whole vehicle seat at the time of flat of the vehicle seat concerning a 1st embodiment of the seatbelt device of the present invention. It is a perspective view of the vehicle seat at the time of normal time of the vehicle seat which concerns on the modification of 1st Embodiment of the seatbelt apparatus of this invention. It is a perspective view of the vehicle seat at the time of normal time of the vehicle seat which concerns on the other modification of 1st Embodiment of the seatbelt apparatus of this invention. It is a perspective view of the vehicle seat at the time of the normal time of the vehicle seat which concerns on 2nd Embodiment of the seatbelt apparatus of this invention.

  Hereinafter, a first embodiment of a seat belt device of the present invention will be described with reference to the drawings. In the following description, the vehicle longitudinal direction refers to the vehicle longitudinal direction when the vehicle is moving forward, and the vehicle width direction refers to the vehicle lateral direction. The following embodiments are preferred specific examples of the seat belt device of the present invention, and may have various technically preferable limitations. However, the technical scope of the present invention particularly includes the present invention. As long as there is no description which limits, it is not limited to these aspects. In addition, the constituent elements in the embodiments shown below can be appropriately replaced with existing constituent elements and the like, and various variations including combinations with other existing constituent elements are possible. Therefore, the description of the embodiment described below does not limit the contents of the invention described in the claims.

  In FIGS. 1 and 2, reference numeral 10 denotes a vehicle body of a camping specification automobile (vehicle), and 12 denotes a floor surface in the passenger compartment of the vehicle body 10. In the vehicle interior of the vehicle body 10, vehicle seats 20 in the second and third rows are arranged behind the front seat (not shown). The vehicle seat 20 has a vehicle width direction in each of the second row (hereinafter referred to as “front row” according to the description) and the third row (hereinafter referred to as “rear row” according to the description). Are arranged in three rows (two rows in the front and rear and three rows in the left and right) in the vehicle left and right and the center in the vehicle width direction. Accordingly, in the following description, an arbitrary one of the vehicle seat 20 will be described, and the description will be omitted in the other cases.

  The vehicle seat 20 includes a seat cushion 22, a seat back 24 that can tilt forward and backward with the vicinity of the lower end adjacent to the rear edge of the seat cushion 22 as a pivot, and a seat back 24 attached to the seat cushion 22. A bracket 26 for connection and a seat frame 28 for fixing the seat cushion 22 to the floor surface 12 are provided. The seat frame 28 can be fixed to, for example, a seat slide device (not shown) for enabling the front row of vehicle seats 20 to be slidable in the longitudinal direction of the vehicle body.

  The seat cushion 22 includes a cushion frame 22 a integrated with the seat frame 28. The seat back 24 includes a seat back frame 24 a connected to the bracket 26. Thereby, the cushioning property and shape retention property of the seat cushion 22 and the seat back 24 are ensured by the frames 22a and 24a. In addition, the bracket 26 is connected across the frames 22a and 24a, and for example, an inclination of the seat back 24 toward the front of the vehicle body and an inclination toward the rear of the vehicle body are permitted by operation of a seat reclining device (not shown). Yes. At this time, as shown in FIG. 2, the seat back 24 can be tilted and fixed to the rear of the vehicle body so that the seat cushion 22 and the seat back 24 are in a flat state. In addition, since the well-known technique can be employ | adopted for the structure of inclination, fixation, etc. to a flat state, and the specific structure of a seat reclining apparatus, the detailed description is abbreviate | omitted here.

  A seat belt device 30 is disposed on the seat frame 28. As shown in FIGS. 3 and 4, the seat belt device 30 is provided with a tongue insertion port 32 that opens on the upper side of the seat back 24 of the vehicle seat 20, and a rear side (downward) of the tongue insertion port 32. The first buckle 34 that is disposed and fixed to the seat back 24, and is provided so as to be able to protrude from between the seat cushion 22 and the seat back 24 of the vehicle seat 20 so as to be positioned substantially below the first buckle 34. The second buckle 36, the third buckle 38 that is removably provided on the upper surface of the seat cushion 22 opposite to the second buckle 36, and the first buckle 34 are detachably engaged. At the same time, the first tongue 42 from which one end side of the seat belt webbing 40 is pulled out and the second buckle 36 are detachably engaged and held at the other end of the seat belt webbing 40. The second tongue 44 formed and the third buckle 38 are detachably engaged and a third belt movably provided on the seat belt webbing 40 between the first tongue 42 and the second tongue 44 is provided. , And a seat belt retractor device 48 that allows one end of the seat belt webbing 40 to be pulled out and taken up.

  In the present embodiment, the tongue insertion port 32 is disposed on the upper surface near the side of the seat back 24 and is opened by a resin frame 50 provided in the seat back 24 so as to be substantially flush with the upper surface. Has been.

  The first buckle 34 is fixed to the seat upper side of the seat back frame 24a via a bracket 52. Further, a known one is adopted for the first buckle 34 and is arranged vertically so that the first tongue 42 can be inserted from above the seat back 24. At this time, the first buckle 34 is of a type that allows the button operation for releasing the engagement state of the first tongue 42 from the tongue insertion port 32.

  The second buckle 36 is fixed to the seat frame 28 below the seat cushion 22 so as to be able to protrude and retract from between the seat cushion 22 and the seat back 24 immediately below the tongue insertion port 32. In the present embodiment, one end of a fixing belt 54 made of the same material as the seat belt webbing 40 is fixed to the seat frame 28, and the second buckle 36 is fixed to the other end of the fixing belt 54, whereby the second buckle 36 can be projected and retracted between the seat cushion 22 and the seat back 24.

  As the third buckle 38, a known buckle for a seat belt device is applied. At this time, the third buckle 38 can be projected and retracted from between the seat cushion 22 and the seat back 24. In the case of the vehicle seat 20 arranged in the center in the vehicle width direction, it may be possible to appear and disappear between the seat cushion 22 and the seat cushion 22 of the adjacent vehicle seat 20. Further, in the case of the vehicle seat 20 disposed on both sides of the vehicle body, the vehicle seat 20 may be disposed between the seat cushion 22 and the vehicle body inner surface. In the present embodiment, similarly to the second buckle 36, one end of a fixed belt 56 that is fixed to the seat frame 28 below the seat cushion 22 and made of the same material as the seat belt webbing 40 is attached to the seat frame 28. By fixing and fixing the second buckle 36 to the other end of the fixing belt 54, the third buckle 38 can be projected and retracted from between the seat cushion 22 and the seat back 24.

  The first tongue 42 is provided with a belt anchor portion 42 a that guides one end of the seat belt webbing 40 pulled out from the seat belt retractor 48 to the front side of the seat back 24.

  The seat belt retractor device 48 is fixed to the seat frame 28 near the lower end of the lower end of the seat back 24 immediately below the tongue insertion port 32. The type and function of the seat belt retractor device 48 are not particularly limited. Further, when the vehicle seat 20 is not slidable, the seat belt retractor device 48 may be fixed to a vehicle body pillar (not shown) or the floor 12. At this time, the seatbelt webbing 40 pulled out from the seatbelt retractor 48 is in a state in which the third tongue 46 is not engaged with the third buckle 38, and the second buckle 36 is connected to the second buckle 36 from the leading end portion thereof. It is preferable to arrange the tongues 44 so as to be drawn out in a straight line when the tongues 44 are combined. This prevents the seat belt webbing 40 from being twisted, and even when the second tongue 44 is engaged with the second buckle 36, the seat back 24 is tilted backward to make the vehicle seat 20 flat. Even so, it is difficult to obstruct the seat belt webbing 40.

  In the above configuration, as shown in FIG. 5, all the tongues 42, 44, 46 are attached to all the buckles 34, 36 from the use state of a total of six vehicle seats 20 in the front and rear two rows and the left and right three rows. , 38, the seat belt retractor 48 is wound up to the retracted state, and the seat back 24 is tilted backward as shown in FIG. State.

  At this time, a bed state in which no gap is generated can be formed between the seat back 24 of the vehicle seat 20 on the front row side and the seat cushion 22 of the vehicle seat 20 on the rear row side. Needless to say, when the headrest is attached to the seat back 24, appropriate measures are taken depending on the configuration, shape, etc. of the vehicle seat 20, such as removing the headrest.

  By the way, the first buckle 34 and the first tongue 42 as well as the second buckle 36 and the second tongue 44 described above may adopt a buckle tongue configuration applied to a known seat belt device. Although it is good, it is also possible to adopt a dedicated buckle tongue etc. separately.

  FIG. 7 shows a modification in which such a dedicated buckle tongue or the like is partially employed. In addition, the same code | symbol is attached | subjected to the structure same as the said 1st Embodiment, and the description is abbreviate | omitted.

  In FIG. 7, the first buckle 64 has the first tongue 62 inserted from the rear side of the vehicle body, and the entire surface of the first buckle 64 is the upper surface of the seat back 24 by making the first buckle 64 beside in the vehicle body longitudinal direction. The first tongue 62 can be easily inserted and removed, and the first buckle 64 can be easily detached. Therefore, when the belt anchor portion 62a of the first tongue 62 is disposed above the seat back 24, the buckle insertion portion 62b of the first tongue 62 is preferably bent so as to be horizontal in the engaged state. . As a result, the attachment / detachment operation can be performed using the belt anchor portion 62a.

  FIG. 8 shows another modification in which the above-described dedicated buckle tongue or the like is partially adopted. In addition, the same code | symbol is attached | subjected to the structure same as the said 1st Embodiment, and the description is abbreviate | omitted.

  In FIG. 8, an eyebolt 74 having an annular engaging portion 74a as a first buckle is fixed to the seat back frame 24a. Accordingly, the first tongue 72 also includes a belt anchor portion 72a and a latch portion 72b that engages with the engaging portion 74a.

  FIG. 9 shows a second embodiment of the seat belt device of the present invention. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In FIG. 9, a seat belt retractor 88 that can be pulled out and taken up is fixed to one end of the seat belt webbing 40 on the first tongue 82. Thereby, the seat belt retractor device 88 can be provided with the function of the belt anchor portion 82a of the above embodiment. The seatbelt retractor 88 is connected to a power supply cable 86 drawn from the vehicle body side to enable electronic control. For example, an electric retractor device that can wind up the seat belt webbing 40 by a driving force of a motor can be employed. The motor of this electric retractor is normally controlled by an ECU (Electronic Control Unit) having a microcomputer or an application specific integrated circuit (ASIC). Thus, when the collision sensor or the like (not shown) detects the collision of the vehicle by the ECU, the winding motor of the seat belt webbing 40 is actuated to enhance the passenger's restraining effect. In addition, the ECU is connected to a power supply from a vehicle-mounted battery, a collision sensor, and the like by a harness and a connector, and performs power supply and transmission / reception of electric signals.

DESCRIPTION OF SYMBOLS 10 ... Car body 12 ... Floor surface 20 ... Vehicle seat 22 ... Seat cushion 22a ... Cushion frame 24 ... Seat back 24a ... Seat back frame 26 ... Bracket 28 ... Seat frame 30 ... Seat belt apparatus 32 ... Tongue insertion port 34 ... 1st Buckle 36 ... Second buckle 38 ... Third buckle 40 ... Seat belt webbing 42 ... First tongue 42a ... Belt anchor portion 44 ... Second tongue 46 ... Third tongue 48 ... Seat belt retractor device

Claims (9)

A tongue insertion opening that opens on the upper side of the seat back of the vehicle seat;
A first buckle disposed on the back side of the tongue insertion port and fixed to the seat back;
A second buckle provided so as to be able to protrude and retract from between the seat cushion of the vehicle seat and the seat back so as to be positioned substantially below the first buckle;
A third buckle provided on the upper surface of the seat cushion opposite to the second buckle so as to be able to appear and disappear;
A first tongue that detachably engages with the first buckle and from which one end side of the seat belt webbing is pulled out;
A second tongue detachably engaged with the second buckle and held at the other end of the seat belt webbing;
A third tongue detachably engaged with the third buckle and movably provided on the seat belt webbing between the first tongue and the second tongue;
A seatbelt device comprising: The seat belt device according to claim 1, wherein
The seat belt device according to claim 3, wherein the third buckle can be projected and retracted between the seat cushion and the seat back or between adjacent seat cushions. The seat belt device according to claim 1, wherein
The tongue insertion port is disposed on a laterally upper surface of the seat back, and the second buckle can be projected and retracted from between the seat cushion and the seat back immediately below the tongue insertion port. A seat belt device. The seat belt device according to any one of claims 1 to 3,
The seat belt device, wherein the second buckle and the third buckle are fixed to a seat frame below the seat cushion. The seat belt device according to any one of claims 1 to 4,
A seat belt retractor device that winds up one end side of the seat belt webbing is fixed near the lower end of the lower end of the seat back,
The seat belt device, wherein the first tongue is provided with a belt anchor portion that guides one end of the seat belt webbing pulled out from the seat belt retractor device to the front side of the seat back. The seat belt device according to claim 5,
The tongue insertion port is disposed on a side upper surface of the seat back,
The seat belt retractor device is fixed to a seat frame or a floor near a lower end of the seat back just below the tongue insertion port. The seat belt device according to any one of claims 1 to 4,
A seat belt apparatus, wherein a seat belt retractor that winds up one end of the seat belt webbing is fixed to the first tongue. The seat belt device according to claim 7,
A seatbelt device, wherein a power supply cable drawn from the vehicle body side is connected to the seatbelt retractor device.   A vehicle seat comprising the seat belt device according to any one of claims 1 to 8.

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