JP5069092B2 - Seat belt structure with buckle - Google Patents

Description

  The present invention relates to a seat belt structure with a buckle in a seat belt device used for, for example, a rear seat of an automobile.

  2. Description of the Related Art Conventionally, a seat belt device used for a rear seat of an automobile includes, for example, a seat belt with a buckle that is an inner belt disposed at a center portion in a vehicle width direction of a seat cushion, and a shoulder belt supported by a vehicle body, and is attached to the shoulder belt. The occupant seated on the rear seat is restrained by locking the tongue plate that is formed on the buckle.

  On the other hand, there is known one that stores a seat belt with a buckle so that it does not get in the way when not in use. This type of seat belt with a buckle, for example, is schematically shown in FIG. 8A, and a storage pocket 102 is provided in the seat cushion 101 as shown in an enlarged view of a portion A in FIG. When not in use, the webbing 103 is folded and stored in the pocket 102 together with the buckle 104.

  However, the operation of folding the webbing 103 and storing it in the pocket 102 together with the buckle 104 when not in use is cumbersome, cumbersome, and cumbersome. Therefore, the buckle is slid into and stored in the storage space formed in the seat cushion. Patent Document 1 proposes a seat belt structure with a buckle as described above.

  An outline of the seat belt structure with a buckle of Patent Document 1 will be described with reference to FIG. 9A shows the protruding state, and FIG. 9B shows the storage state.

  The seat belt 110 with a buckle is fixed to the floor panel 120 and slides vertically in a cylindrical storage space 123 formed in the seat cushion 121 and slides vertically on the slide rail 111. When the sliding member 112 is attached to the upper end of the sliding member 112 and is moved upward together with the sliding member 112, the seat cushion 121 protrudes from the storage space 123 and is moved downward. A buckle 114 is provided in the storage space 123. Furthermore, a lock device 115 that locks the sliding member 112 moved downward and a spring member (not shown) that moves the sliding member 112 upward when unlocked by the locking device 115 are provided below the slide rail 111.

  In the seat belt 110 with the buckle configured as described above, when the buckle 114 protruding from the storage space 123 is pushed down as shown in FIG. It moves downward along the slide rail 111 against the spring member, is locked by the lock device 115, and is held at the storage position in the storage space 123 as shown in FIG. On the other hand, when the lock of the locking device 115 is released, the buckle 114 moves upward along the slide rail 111 together with the sliding member 112 by the urging force of the spring member, and as shown in FIG. It will be in a usable state protruding.

Japanese Utility Model Publication No. 6-59172

  According to Patent Document 1, when not in use, the buckle 114 protruding above the seat cushion 121 can be pushed down to be held in the storage position in the storage space 123, and when in use, the lock device 115 is unlocked to release the buckle. 114 can be protruded above the seat cushion 121.

  However, the push-down operation of the buckle 114 and the unlocking operation of the lock device 115 are required, and the seat belt 110 with the buckle is slidable along the slide rail 111 fixed to the floor panel 120 and the slide rail 111. Since the moving member 112, the buckle 114, the lock device 115, the spring member, and the like are required, there are many constituent members, and the configuration becomes complicated, and there is a concern that the manufacturing cost may increase. Further, in order to smoothly move the sliding member 112 along the slide rail 111, high assembly accuracy is required for the slide rail 111 and the sliding member 112, and the pressing direction for pressing the buckle 114 depends on the slide rail 111. There is a concern that a smooth push-in operation of the buckle 114 is hindered when it is biased with respect to the extending direction.

  Further, in the retracted state, the buckle 114 is held at a position substantially coinciding with the upper surface of the seat cushion 121, so that the buckle 114 hits the body and gives a foreign object feeling when sitting on the seat cushion 121 or lying down. Is concerned.

  Accordingly, an object of the present invention made in view of such points is to ensure the function as a seat belt device and to sense foreign objects by a buckle that comes into contact with the body when sitting or lying on the seat cushion with a simple configuration. There is little, and it is providing the seatbelt structure with a buckle which can obtain the improvement of comfort.

The invention of the seat belt structure with a buckle according to claim 1, which achieves the above object, wherein the base end of the webbing is fixed to a seat cushion support member, and the buckle provided at the tip of the webbing is supported by the seat cushion. A seatbelt structure with a buckle that fits and holds by the elasticity of the seat cushion in a storage space formed by penetrating from the bottom surface to the top surface of the seat cushion supported on the member, and at least downward from the front portion of the buckle It has a leg portion that extends and has a tip that faces the seat cushion support member with a gap.

According to the present invention, when an occupant moves forward due to an automobile collision or the like, it extends downward from the buckle fitted and held by the elasticity of the seat cushion in the seat cushion storage space. The front end of the leg part abuts on the seat cushion support member to prevent the buckle from moving forward and downward, and the buckle is held at an appropriate intended position. As a result, good occupant restraint by the seat belt device can be obtained.

  Further, when the body is laid down or seated on the seat cushion, the buckle is also regulated by the so-called bottom of the leg portion where the tip of the leg portion comes into contact with the seat cushion support portion while the webbing is bent as the seat cushion is lowered. It is possible to sink to a certain position, the feeling of foreign matter due to the contact of the buckle is reduced, and good comfort is obtained. In addition, since the tip of the leg comes into contact with the seat cushion support portion and excessive sinking of the buckle is restricted, it is possible to prevent deterioration of wearability due to excessive buckling of the buckle. Furthermore, it is a simple configuration in which the leg portion is extended to the buckle, and there are few constituent members, and a reduction in manufacturing cost can be expected.

The invention of the seatbelt structure with a buckle according to claim 2, which achieves the above object, has a base end portion of the webbing fixed to a seat cushion support member, and the buckle provided at the tip end portion of the webbing is supported by the seat cushion. A seat belt structure with a buckle that fits and holds the seat cushion supported on the member by the elasticity of the seat cushion in a storage space formed by penetrating from the bottom surface to the top surface, and is fitted to the outer peripheral surface of the buckle. A cylindrical fitting portion that is held and a leg portion that extends downward from at least the front portion of the fitting portion and has a tip that faces the seat cushion support member with a gap. A leg member is provided.

According to the present invention, similarly to the first aspect, when an occupant moves forward due to an automobile collision or the like, the seat cushion is fitted and held in the seat cushion storage space by the elasticity of the seat cushion. The leg end of the leg member fitted and held by the buckle abuts against the seat cushion support member to prevent the buckle from moving forward and downward, so that the buckle is held in an appropriate position, and the seat belt device is good. Occupant restraint is obtained. Also, when the body is laid down or seated on the seat cushion, the buckle can sink to a position regulated by the so-called bottom of the leg, where the tip of the leg abuts against the seat cushion support when the seat cushion sinks Thus, the feeling of foreign matter due to the contact of the buckle is reduced, and good comfortability is obtained. In addition, since the tip of the leg comes into contact with the seat cushion support portion and excessive sinking of the buckle is restricted, it is possible to prevent deterioration of wearability due to excessive buckling of the buckle.

  Furthermore, the seat belt with a buckle is configured with buckles, leg members, and webbing as main constituent members, and there are few constituent members, the configuration is simple, and a reduction in manufacturing cost can be expected. Moreover, it can respond easily by replacing | exchanging with leg members of a dimension shape, such as a leg part, without changing a buckle according to a specification etc.

  According to a third aspect of the present invention, in the seatbelt structure with a buckle according to the second aspect, the leg member is a tubular shape having an upper opening and a lower opening, and is fitted and held on the outer peripheral surface of the buckle. And a leg portion that extends downward from the front portion of the fitting portion and has a tip that opposes the seat cushion support member with a gap therebetween, and is formed at the rear of the leg portion. An open portion that allows the webbing to protrude is formed along the lower opening of the fitting portion.

  According to the present invention, since the open portion that allows the webbing to protrude is formed along the lower opening of the fitting portion at the rear of the leg portion of the leg member, the webbing is performed when the buckle sinks together with the seat cushion. Thus, the buckle can be reliably bent, and the buckle can be sunk together with the seat cushion.

  According to a fourth aspect of the present invention, in the seatbelt structure with a buckle according to any one of the first to third aspects, the upper part of the buckle is substantially flush with the upper surface of the seat cushion or slightly protrudes into the storage space. It is fitted and held.

  According to the present invention, the upper part of the buckle inserted into the storage space is held at a position substantially flush with or slightly protruding from the upper surface of the seat cushion, and the buckle is not placed on the upper surface of the seat cushion. As a result, a seat cushion excellent in appearance quality can be obtained, and good detachability of the seat belt can be secured.

According to the present invention, when a situation in which an occupant moves forward due to a collision of an automobile or the like occurs, the buckle that is fitted and held in the seat cushion storage space by the elasticity of the seat cushion is moved forward and downward. The movement is blocked and the buckle is held in the desired position, so that a good seat belt device function can be obtained. On the other hand, when the body is laid down or seated on the seat cushion, the buckle also sinks to a position regulated by the so-called bottom of the leg portion where the tip of the leg portion comes into contact with the seat cushion support portion as the seat cushion sinks. It becomes possible, the feeling of foreign matter due to the contact of the buckle is extremely reduced, and good comfortability is obtained. In addition, it is possible to prevent deterioration of wearability due to excessive buckle sinking.

  A case where the embodiment of the seat belt structure with a buckle according to the present invention is applied to a rear seat will be described with reference to FIGS. 1 to 7 as an example.

  1 is a perspective view showing an outline of a state in which a seat belt 11 with a buckle is mounted on a rear seat 1 of an automobile, FIG. 2 is a cross-sectional view taken along line II in FIG. 1, and FIG. 3 is a cross-sectional view taken along line II-II in FIG. 4 is a perspective view of a buckle, and FIG. 5 is a perspective view of a leg member. In each figure, arrow F indicates the front side of the vehicle body, and arrow W indicates the vehicle width direction.

  The rear seat 1 includes a seat cushion 2 placed on a floor panel 10 which is a seat cushion support member, and a backrest 8 disposed behind the seat cushion 2. The seat cushion 2 covers the cushion material 3 with a skin 4. Configured.

The rear portion of the vehicle width direction center of the seat cushion 2, front 5a to extend from the bottom surface 6 on the upper surface 7, rear 5b, both side surfaces 5c, the elongate hole-shaped housing space 5 having an inner circumferential surface of the 5d through It is formed.

  As shown in FIGS. 2 and 3, the seat belt 11 with the buckle includes a buckle 12, a leg member 20 attached to the buckle 12, and a base end portion 32 fixed to the floor panel 10 via an anchor plate 25. The webbing 30 in which the buckle 12 is coupled to 33 is configured as a main part.

  As shown in FIGS. 2 to 4, the buckle 12 has a cylindrical housing 13 having a front surface 13a, a rear surface 13b, both side surfaces 13c and 13d, an upper portion 13e being opened, and a webbing insertion hole (not shown) being opened in a lower portion 13f. A webbing locking portion 13 g is provided in the housing 13. The front surface 13a, the rear surface 13b, and both side surfaces 13c, 13d are gently curved so that the front surface 13a and the rear surface 13b gradually approach each other and the both side surfaces 13c and 13d gradually approach as the upper portion 13e moves to the lower portion 13f. Yes.

  A lock mechanism (not shown) is accommodated in the housing 13, and a tongue insertion port 14 and an operation unit 15 are disposed in an upper portion 13 e of the housing 13. When a tongue plate attached to a shoulder belt (not shown) is inserted from the tongue insertion port 14, the tongue plate is locked by the locking mechanism, while the locking mechanism releases the locking of the tongue plate by the pressing operation of the operation unit 15. Thus, the tongue plate can be removed from the tongue insertion port 14. The lock mechanism has an existing well-known configuration and has no direct relationship with the present invention, and thus the description thereof is omitted.

  2, 3 and 5, the leg member 20 includes a front wall surface 21a and a rear wall surface that can come into contact with the outer peripheral surfaces of the front surface 13a, the rear surface 13b, and both side surfaces 13c and 13d of the housing 13 of the buckle 12. 21b, both side wall surfaces 21c and 21d, and a substantially rectangular tubular fitting portion 21 having an upper opening 21e at the upper end and a lower opening 21f at the lower end.

  Furthermore, a leg portion 22 that extends downward is integrally formed at the lower end of the front wall portion 21 a that is the front portion of the fitting portion 21. The leg portion 22 is formed to be bent rearward along the strip-like leg main body 22a extending downward from the lower end of the front wall portion 21a of the fitting portion 21 and both side edges of the leg main body 22a, and the flange portions 22b and 22c. The upper ends of the flange portions 22b and 22c are continuously formed at the lower front portions of the side wall surfaces 21c and 21d, respectively. Further, the length of the leg portion 22 is set so that the front end 22d faces the floor panel 10 with a gap at a use position to be described later.

  The leg member 20 formed in this way is formed with an open portion 23 cut out along the lower opening 21 f of the fitting portion 21 behind the leg portion 22.

  On the other hand, the anchor plate 25 is constituted by a plate-like member bent in a substantially L shape, in which a webbing attachment portion 26 in which the webbing insertion hole 26a is opened and an attachment portion 27 in which the attachment hole 27a is formed are integrally formed.

  The webbing 30 includes a belt-shaped webbing body 31 and a base end part 32 and a distal end part 33 that are continuously formed on both ends of the webbing body 31, respectively. The end portion 32a of the base end portion 32 is inserted into the webbing insertion hole 26a of the anchor plate 25 and folded, and the end portion 32a is superimposed on the webbing body 31, while the end portion 33a of the distal end portion 33 is used as the housing of the buckle 12. 13 is inserted through a webbing insertion hole that opens to 13 and is engaged with the webbing engagement part 13g and folded back, and its end 33a is superimposed on the end 32a of the base end 32, and these laminated webbing main bodies 31, The end portion 32a of the base end portion 32 and the end portion 33a of the distal end portion 33 are stitched together. As a result, the anchor plate 25 is coupled to the proximal end portion 32 of the webbing 30, and the buckle 12 is coupled to the distal end portion 33.

  The anchor plate 25 attached to the buckle 12 via the webbing 30 is inserted into the fitting part 21 from the upper opening 21e side of the leg member 20, and the webbing 30 penetrates the fitting part 21. Further, the inner peripheral surfaces of the front wall surface 21a, the rear wall surface 21b, and both side surfaces 21c, 21d of the fitting portion 21 are brought into contact with the outer peripheral surfaces of the front surface 13a, the rear surface 13b, and the both side surfaces 13c, 13d of the buckle 12, respectively. The fitting part 21 is fitted to the outer peripheral surface of the housing 13 to attach the leg member 20 to the buckle 12.

  Further, as shown in FIGS. 2 and 3, the anchor plate 25 is connected to the base end portion 32 of the webbing 30 protruding from the lower opening 21f of the leg member 20 with the distal end portion 33 being connected to the buckle 12. The mounting portion 27 is attached to the floor panel 10 by a mounting bolt 35 inserted through the mounting hole 27a and penetrating through the mounting hole 10a formed in the floor panel 10 and a nut 36 screwed into the mounting bolt 35.

  The buckle 12 attached to the floor panel 10 via the anchor plate 25 and the webbing 30 is inserted into the storage space 5 formed in the seat cushion 10 from the lower surface 6 side, and as shown in FIGS. 13 and the front surface 13a of the leg member 20 and the front wall surface 21a, the rear surface 13b and the rear wall surface 21b, the side surface 13c and the side wall surface 21c, the side surface 13d and the side wall surface 21d are the front surface 5a, the rear surface 5b, the side surface 5c and the side surface 5d, respectively. The upper portion 13e of the housing 13, that is, the tongue insertion port 14 and the operation portion 15 are substantially flush with the upper surface 7 of the seat cushion 2 or slightly protruded in a state where the webbing 30 is stretched while being in contact with each other. The seat cushion 2 is held by elasticity. Further, the tip 22d of the leg portion 22 of the leg member 20 held in the use position faces the floor panel 10 with a preset gap therebetween. The gap between the tip 22d of the leg portion 22 and the floor panel 10 is set by experiments, simulations, or the like depending on the thickness of the seat cushion 2, the amount of sinking of the seat cushion 2 when seated, and the like.

  According to the seatbelt 11 with the buckle configured as described above, the tongue of the buckle 12 inserted into the storage space 5 as shown in FIGS. 1 to 3 when there is no occupant during normal use or not in use. The insertion opening 14 and the operating portion 15 are held at a position that is substantially flush with or slightly protruding from the upper surface 7 of the seat cushion 2, and the buckle 12 is not placed on the upper surface 7 of the seat cushion 2, so that the seat cushion 2 A rear seat 1 with improved appearance and excellent appearance quality can be obtained.

  Further, the tongue insertion port 14 and the operation portion 15 are projected from the upper surface 7 of the seat cushion 2 or are held flush with each other, and the insertion and operation of the operation portion 15 are made possible by the tongue insertion port 14 of the tongue plate attached to the shoulder belt. It is good and secures the detachability of the seat belt.

  On the other hand, when an occupant seated on the rear seat 2 is wearing the seat belt with the shoulder belt tongue plate engaged with the buckle 12, and the occupant moves forward due to an automobile collision or the like, A load in the forward direction acts on the shoulder belt that restrains the belt, the buckle 12 that locks the tongue plate is pulled forward via the shoulder belt, and the front surface 13 a and the front wall surface 21 a of the leg member 20 are the front surface of the storage space 5. The front and lower movements of the buckle 12 are slightly moved forward and downward while pressing the 5a, but the base end portion 32 is blocked by the tension of the webbing 30 fixed to the floor 10 via the anchor 25. The restraint state is maintained. At this time, as the buckle 12 moves forward and downward and the webbing 30 tilts, the leg member 20 fitted and held by the buckle 12 tilts integrally with the buckle 12 and extends to the front portion of the leg member 20. The front end 22d of the leg portion 22 comes into contact with the floor panel 10. As a result, the buckle 12 fitted and supported by the leg member 20 is prevented from moving forward and downward, and the buckle 12 is held at an appropriate intended position. Therefore, reliable occupant restraint by the seat belt, that is, the function of the seat belt device can be obtained.

  Thereafter, when the load on the seat belt is released, the front surface 5a of the storage space 5 mainly presses the front surface 13a of the buckle 12 and the front wall surface 21a of the leg member 20 by the elastic restoration of the seat cushion, thereby removing the buckle 12 and the like. Move to use position.

  Further, a gap is formed between the front end 22 d of the leg portion 22 of the leg member 20 attached to the buckle 12 and the floor panel 10, and the leg member 21 is bent along the lower opening portion 21 f of the fitting portion 21. Since the open portion 23 that allows the portion 30A of the bent webbing 30 to protrude is formed, the leg member 20 does not prevent the webbing 30 from being bent and deformed.

  As a result, when the body lies down or is seated on the seat cushion 2 while the buckle 12 is held at the use position, the buckle is bent while the webbing 30 is bent as the seat cushion 2 sinks as shown in FIGS. 12 can also sink to a position regulated by the so-called bottom of the leg portion 22 where the tip 22d of the leg portion 22 abuts against the floor panel 10, and the feeling of foreign matter due to the abutment of the buckle 12 is reduced. Sex is obtained. In addition, since the tip 22d of the leg portion 22 abuts against the floor panel 10 and excessive sinking of the buckle 12 is restricted, it is possible to prevent deterioration in wearability due to excessive sinking of the buckle 12.

  On the other hand, when the body is separated from the seat cushion 2 and the lowered seat cushion 2 is restored by its elasticity, the inner surface of the storage space 5 that elastically contacts the buckle 12 is restored, and the upper surface 7 of the seat cushion 2 is substantially the same. It is lifted and held up to one or slightly protruding use position.

  Therefore, according to the present embodiment, the upper portion of the buckle 12 inserted into the storage space 5 of the seat cushion 2 in use, that is, the tongue insertion port 14 and the operation portion 15 are substantially flush with the upper surface 7 of the seat cushion 2. The rear seat 1 which is held at a slightly protruding position to improve the appearance of the seat cushion 2 and has an excellent appearance quality can be obtained, and the seat belt can be easily attached and detached.

  Further, when a situation occurs in which an occupant moves forward due to an automobile collision or the like, the front end 22d of the leg portion 22 extended to the front portion of the leg member 20 comes into contact with the floor panel 10 and the leg member. The buckle 12 fitted and supported at 20 is prevented from moving forward and downward and is held at an appropriate intended position, and good occupant restraint by the seat belt is obtained.

  Furthermore, when the body is laid down or seated on the seat cushion 2, the buckle 12 can be lowered to a position regulated by the bottom of the leg portion 22 while the webbing 30 is bent together with the seat cushion 2. The feeling of foreign matter when the buckle 12 hits the body is extremely reduced, and good comfort is obtained. In addition, it is possible to prevent deterioration in wearability due to excessive sinking of the buckle 22.

  In addition, according to the present embodiment, the seat belt 11 with the buckle is configured with the buckle 12, the leg member 20, and the webbing 30 as the main constituent members, so that the number of constituent members is small and the configuration is simple. It is also possible to use the buckle 12 and the webbing 30 without changing them, and a reduction in manufacturing cost can be expected. Further, it is possible to replace the leg member 20 having a different dimensional shape such as the leg portion 22 without changing the buckle 12 according to the specification of the automobile, and the versatility of the buckle 12 can be obtained.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of invention. For example, in the above embodiment, the leg member 20 is configured by the cylindrical fitting portion 21 that fits the buckle 12 and the leg portion 22 that extends downward from the front portion of the fitting portion 21, but the leg portion is fitted. It is also possible to open an opening portion that is formed in a cylindrical shape continuous to the joint portion and allows the webbing to be bent to protrude to the side portion other than the front portion of the leg portion.

  In the above embodiment, the buckle 12 and the leg member 20 are formed separately, but the leg portion may be formed integrally with the housing of the buckle to reduce the number of constituent members.

It is a general | schematic perspective view of the aspect which applied the seatbelt structure with a buckle which concerns on embodiment to a rear seat. It is the II sectional view taken on the line of FIG. It is the II-II sectional view taken on the line of FIG. It is a perspective view of a buckle. It is a perspective view of a leg member. FIG. 3 is a view corresponding to FIG. 2 showing a seat cushion and a buckle in a depressed state. FIG. 4 is a view corresponding to FIG. 3 showing a seat cushion and a buckle in a depressed state. It is the schematic of the conventional seat belt structure with a buckle. It is the schematic of the conventional seat belt structure with a buckle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rear seat 2 Seat cushion 5 Storage space 6 Bottom surface 7 Upper surface 10 Floor panel (seat cushion support member)
11 Seat belt with buckle 12 Buckle 20 Leg member 21 Fitting part 21e Upper end opening part 21f Lower end opening part 22 Leg part 22d Tip 23 Opening part 30 Webbing 32 Base end part 33 Tip part

Claims (4)

A storage formed by fixing the base end portion of the webbing to the seat cushion support member and penetrating the buckle provided at the front end portion of the webbing from the bottom surface to the upper surface of the seat cushion supported on the seat cushion support member. A seat belt structure with a buckle that fits and holds in the space by the elasticity of the seat cushion ,
A seatbelt structure with a buckle, characterized by comprising a leg portion extending downward from at least a front portion of the buckle and having a front end facing the seat cushion support member with a gap. A storage formed by fixing the base end portion of the webbing to the seat cushion support member and penetrating the buckle provided at the front end portion of the webbing from the bottom surface to the upper surface of the seat cushion supported on the seat cushion support member. A seat belt structure with a buckle that fits and holds in the space by the elasticity of the seat cushion ,
A cylindrical fitting portion that is fitted and held on the outer peripheral surface of the buckle;
With a buckle characterized by comprising a leg member that extends downward from at least the front part of the fitting part, and has a tip formed integrally with the seat cushion support member and a leg part that is opposed to each other with a gap. Seat belt structure. The leg member is a cylindrical shape having an upper opening and a lower opening, and a fitting part fitted and held on the outer peripheral surface of the buckle;
A leg portion that extends downward from the front portion of the fitting portion and has a tip that is opposed to the seat cushion support member with a gap is formed integrally.
3. The seat belt structure with a buckle according to claim 2, wherein an opening portion that allows the webbing to protrude is formed along the lower opening of the fitting portion behind the leg portion.   The seat belt with a buckle according to any one of claims 1 to 3, wherein an upper portion of the buckle is substantially flush with or slightly protruded from an upper surface of the seat cushion and is fitted and held in a storage space. Construction.

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