JP5298970B2 - Seat belt buckle mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a buckle attachment structure for a seat belt, capable of maintaining a self-sustaining state while a seat belt is being fitted and avoiding interference with a seat back when the seat back is tilted forward. <P>SOLUTION: A buckle storage recessed portion 9 is provided on a seating surface 3a of a seat cushion 3 and a boot 6 in a self-sustaining state while supporting a buckle 5 is provided on a bottom surface 9a of the buckle storage recessed portion 9. Besides, on the buckle storage recessed portion, there is provided an inclined surface 9c which abuts on the boot 6 when the seat back is tilted forward and which rotates the buckle 5 from a buckle longitudinal direction X facing a vehicle longitudinal direction to a state facing a vehicle cross direction. A twisting state in which the buckle longitudinal direction is made to face the vehicle longitudinal direction is maintained on the boot 6 when the seat back is tilted straight. Further, there is provided a twisting state setting a twisting cancel state in which the buckle longitudinal direction is made to face the vehicle cross direction when the seat back is tilted forward. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a seat belt buckle mounting structure.

  In a conventional seat belt buckle mounting structure, a resin boot is inserted into a buckle support hole formed in a seat cushion, and the buckle is maintained independently by the elasticity of the seat cushion. An example related to this technique is described in Patent Document 1.

JP 2000-321594 A

However, the prior art has a problem in that when the seat back is moved forward, the buckle interferes with the seat back and an indentation is generated.
SUMMARY OF THE INVENTION An object of the present invention is to provide a seat belt buckle mounting structure that can maintain its independence when a seat belt is worn and can avoid interference with the seat back when the seat back is moved forward.

  In the present invention, when the seat back rises, the buckle is self-supporting with the longitudinal direction directed in the vehicle front-rear direction, and when the seat back is tilted forward, the buckle is provided on the seating surface of the seat cushion with the longitudinal direction oriented in the vehicle width direction. The buckle is stored in the recess.

  Therefore, in the present invention, it is possible to maintain independence when the seat belt is worn and to avoid interference with the seat back when the seat back is moved forward.

1 is a partial cross-sectional side view of a rear seat 1 of a vehicle to which a seat belt buckle mounting structure according to a first embodiment is applied. It is a perspective view of the buckle 5 which shows the buckle attachment structure of the seatbelt of Example 1. FIG. FIG. 6 is a perspective view showing a state of the buckle 5 and the boot 6 when the seat back 2 is raised from a rising position A to a forward position B. FIG. 4 is a front view of the buckle 5 and the boot 6 when the seat back 2 is raised from a rising position A to a forward position B. FIG. 4 is a perspective view of a rear seat 1 showing a seat belt buckle mounting structure of Example 2. It is a perspective view of the buckle 17 which shows the buckle attachment structure of the seatbelt of Example 2. FIG. (a) is a side view showing the state of the buckle 17 at the seat back rising position A, and (b) is a side view showing the state of the buckle at the seat back forward-falling position B. It is a top view which shows the swing state of the buckle. FIG. 6 is a partial cross-sectional side view of a rear seat 1 of a vehicle to which a seat belt buckle mounting structure according to a third embodiment is applied. It is a top view of the buckle which shows the buckle attachment structure of the seatbelt of Example 3. FIG. It is S11-S11 sectional drawing of FIG. 10 is a cross-sectional view taken along the line S11-S11 of FIG. 10 showing a seat belt buckle attachment structure of another example in which the cushion material 21 of Example 3 is replaced with a gap 27. FIG.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the buckle attachment structure of the seatbelt of this invention is demonstrated based on the Example shown on drawing.

FIG. 1 is a partial cross-sectional side view of a rear seat 1 of a vehicle to which a seat belt buckle mounting structure according to a first embodiment is applied.
In FIG. 1, the rear seat 1 has a seat back 2 and a seat cushion 3, and the seat back 2 is centered on the rotating shaft 4 from the seat back rising position A when the seat is used, and when the seat is not shown by a broken line. The state changes to the position B where the seat back is moved forward.

  The rear seat 1 is provided with a buckle 5 for inserting a tongue plate (not shown) for each seat. The buckle 5 is connected to a webbing 5 a penetrating the seat cushion 3 in the vertical direction, and the lower end of the webbing 5 a is fixed to the anchor 7. The anchor 7 is bolted to the floor 8. The buckle 5 is maintained in a self-supporting state by a boot (support member) 6. A buckle storage recess 9 is provided around the buckle 5 on the seating surface 3 a of the seat cushion 3.

  In the first embodiment, when the seatback 2 is in the raised position A, the buckle 5 is supported by the boot 6 and is self-supporting. When the seatback 2 is in the forward position B, the boot 6 is bent so that the buckle 5 is stored in the buckle. Stored in the recess 9. Hereinafter, the structure will be described in detail.

FIG. 2 is a perspective view of the buckle 5 showing the seat belt buckle mounting structure of the first embodiment.
The boot 6 protrudes above the seat cushion 3 from a cushion pad slit 9 b opened in the bottom surface 9 a of the buckle storage space 9. The cushion pad slit 9b is a slit formed by hollowing out the cushion, and the longitudinal direction X thereof is arranged in the vehicle width direction.

  The boot 6 covers a portion other than the tip of the buckle 5 and a part of the webbing 5a. The boot 6 is formed of a flexible elastic material such as a synthetic resin so as to support the buckle 5 and be able to stand on its own.

  The boot 6 is set to be twisted so that the portion protruding from the cushion pad slit 9b and the portion covering the buckle 5 are twisted by 90 degrees in a self-supporting state. This twist is formed into a twisted shape when the boot 6 is formed. When an external force is applied in the direction opposite to the twist, the twist is eliminated, and when the external force disappears, the twisted shape is restored. Due to this twisting, the buckle 5 is self-supporting in a state where the buckle longitudinal direction X is directed in the vehicle front-rear direction, that is, the buckle 5 is in use. The torsional hardness of the boot 6 can be tuned to an optimum hardness by forming a plurality of slits in the length direction of the boot 6 and changing the number and width of the slits.

  On the other hand, the buckle storage recess 9 is brought into contact with the front surface 6a and the right side surface 6b of the boot 6 when the seat back is tilted forward, so that the buckle 5 is directed in the vehicle width direction from the state where the buckle longitudinal direction X is directed in the vehicle longitudinal direction. An inclined surface 9c that is rotated 90 degrees to the state is set.

Next, the operation will be described.
FIG. 3 is a perspective view showing the state of the buckle 5 and the boot 6 when the seat back 2 is raised from the raised position A to the forward position B, and FIG. 4 is a diagram showing the seat back 2 being raised from the raised position A to the forward position B. It is a front view of the buckle 5 and the boot 6 at the time. 3 (b) shows the same time as FIG. 4 (b), FIG. 3 (c) shows the same time as FIG. 4 (c), and the seat back 2 is in the forward position B. Represents a state.

  As shown in FIG. 3 (a), when the seat back 2 is in the raised position A, the buckle 5 is self-supporting due to the elastic force of the boot 6, and the buckle longitudinal direction X faces the vehicle longitudinal direction. The tongue can be latched (engaged with the buckle 5) with one hand, and is excellent in wearability. Further, when the wearer sits on the rear seat 1, when the wearer's body hits the boot 6, the buckle 5 flexes his / her neck flexibly, so that the uncomfortable feeling caused by the contact can be reduced.

  Here, as the material of the boot 6 is made softer, the twist elimination performance of the boot 6 when the buckle 5 is stored in the buckle storage recess 9 can be enhanced, but the self-supporting performance is lowered. On the other hand, in Example 1, since the lower part of the boot 6 is clamped by the cushion pad slit 9b, the self-supporting state can be maintained even when the boot 6 is softened.

  When the seat back 2 is moved forward from the state of FIG. 3 (a), the back surface 6c of the boot 6 comes into contact with the seat back 2 and the buckle 5 is gradually pushed downward as shown in FIG. 4 (a). FIG. 3 (b) and FIG. 4 (b)).

  After the front surface 6a of the boot 6 is pushed down to the position of the inclined surface 9c, the boot 6 receives a reaction force from the inclined surface 9c and rotates counterclockwise in FIG. It is pushed downward by the seat back 2.

  Here, the harder the material of the boot 6 is, the higher the self-supporting performance of the buckle 5 is. However, the twist-removing performance of the boot 6 when the buckle 5 is stored in the buckle storage recess 9 is lowered. On the other hand, in Example 1, since the inclined surface 9c forcing the rotation of the boot 6 is provided, the twist eliminating performance can be maintained even when the boot is hardened.

  When the seat back 2 is tilted to the forward position B, as shown in FIGS. 3 (c) and 4 (c), the buckle 5 has a buckle storage recess 9 with the buckle longitudinal direction X oriented in the vehicle width direction W. Stored in. For this reason, since the height (distance from the seating surface 3 a to the bottom surface 9 a) of the buckle storage recess 9 can be suppressed in the width direction Y <b> 1 of the boot 6, it can also be applied to the thin seat cushion 3.

Next, problems to be solved by the seat belt buckle mounting structure of the first embodiment will be described.
As a conventional buckle mounting structure, a structure in which the buckle is supported by a support such as a boot and is sandwiched by a slit formed in a cushion pad is known. By keeping the buckle self-supporting, when the wearer latches the tongue, the boot is bottomed to restrict the vertical movement and improve the wearability.

  Also known is a belt guide that is interlocked with the armrest so that the buckle is self-supporting by pulling up the buckle when the armrest is pulled out, and the buckle is stored in a slit formed in the cushion by its own weight when the armrest is retracted.

  In the former prior art, in order to make the buckle self-supporting, it is necessary to take a sufficiently large thickness of the cushion pad with respect to the height direction of the buckle. Since it protrudes from the cushion surface, there is a possibility that the wearer may feel uncomfortable. Further, when the seat back is moved forward, the buckle hits the seat back, and an impression is generated on the seat back.

  On the other hand, in the latter case, since the buckle is self-supporting only when the armrest is pulled out, the effect cannot be exhibited when the armrest is not used (for example, when three people are seated). Further, since the armrest is pulled out for the buckle to stand on its own, it takes time to latch the tongue.

  On the other hand, in the buckle mounting structure of the seat belt of the first embodiment, a buckle storage recess 9 is provided on the seating surface 3a of the seat cushion 3, and a boot that supports the buckle 5 on the bottom surface 9a of the buckle storage recess 9 and is self-supporting. 6 and the buckle storage recess 9 is brought into contact with the boot 6 when the seatback is tilted forward, and the buckle 5 is rotated from the state in which the buckle longitudinal direction X faces the vehicle longitudinal direction to the state in which the vehicle width direction W faces. The boot 6 maintains a twisted state in which the buckle longitudinal direction X is directed in the vehicle longitudinal direction when the seat back is raised, and when the seat back is tilted forward, the buckle longitudinal direction is directed in the vehicle width direction W. Set the twist to be.

For this reason, the said subject can be solved so that it may enumerate below.
The buckle 5 is stored in the buckle storage recess 9 in a state where the buckle longitudinal direction X is directed in the vehicle width direction W by raising the seat back 2 from the rising position A to the forward position B. For this reason, the interference between the seat back 2 and the buckle 5 when the seat back is moved forward can be avoided, and the occurrence of indentation of the seat back 2 can be prevented. It can also be applied to thin seat cushions.

  Since the buckle 5 is self-supporting due to the elastic force of the boot 6, an operation for making the buckle 5 self-supporting is unnecessary. Further, since the buckle 5 is self-supporting with the longitudinal direction X directed in the vehicle front-rear direction, it does not require time to latch the tongue and is excellent in wearability.

  FIG. 5 is a perspective view of the rear seat 1 showing the seat belt buckle mounting structure of the second embodiment. In addition, about the part which is common in Example 1, it represents with the same name and the same code | symbol, and abbreviate | omits description.

  The rear end of the seating surface 3 a of the seat cushion 3 forms a buckle storage recess 11. An inclined guide surface 11a is formed on the vehicle front side of the buckle storage recess 11 so that the bottom surface 11b of the buckle storage recess 11 and the seating surface 3a are continuous (see FIG. 7). In the seat cushion 3, urethane having a higher foaming ratio than other portions is disposed on the left and right portions of the inclined guide surface 11a so as to be soft.

  A buckle advance / retreat member 12 is fixed to the seat back lower pipe 2 a constituting the rotating shaft 4 of the seat back 2. The buckle advance / retreat member 12 is formed in a substantially U shape using a wire, and the upper end of the U shape is fixed to the seat back lower pipe 2a. On the left and right sides of the buckle advance / retreat member 12, the webbings 15, 16 of the two buckles 13, 14 are arranged with the buckle longitudinal direction X facing the up-down direction. Both webbings 15 and 16 are sewn at two locations with the buckle advancement / retraction member 12 in between. A wide stopper portion 12 a is formed at the lower end of the buckle advance / retreat member 12 as a stopper for removing both webbings 15 and 16.

  As shown in FIG. 6, one buckle 17 may be fixed to the buckle advance / retreat member 12. In this case, the buckle advance / retreat member 12 is sandwiched between the right webbing 18a and the left webbing 18b of the webbing 18, and the two parts are stitched together. Hereinafter, an operation when one buckle 17 is fixed to the buckle advance / retreat member 12 will be described.

FIG. 7A is a side view showing the state of the buckle 17 at the seat back rising position A, and FIG. 7B is a side view showing the state of the buckle 17 at the seat back forward-falling position B.
As shown in FIG. 7A, when the seat back 2 is in the raised position A, the buckle 17 is pushed onto the inclined guide surface 11a by the buckle advancement / retraction member 12. At this time, since the buckle 17 faces upward in a state where the longitudinal direction X is directed in the vehicle front-rear direction, the wearer can latch the tongue with one hand and has excellent wearability.

  Here, by narrowing the width of the inclined guide surface 11a, the buckle 17 can be more reliably self-supporting. However, when the wearer's body hits the buckle 17 as the width is narrowed, the buckle 17 This makes the wearer feel uncomfortable because it is difficult to swing the head.

  Therefore, in the second embodiment, urethane having a higher foaming ratio than other portions is disposed in a portion that contacts the buckle 17 of the seat cushion 3 so as to be soft. As a result, as shown in FIG. 8, when the wearer comes into contact with the buckle 17, the buckle 17 can swing his / her head greatly left and right while deforming the seat cushion 3. Therefore, it is possible to reduce a sense of discomfort due to contact while maintaining the holding performance of the buckle 17 by narrowing the width of the inclined guide surface 11a.

  When the seat back 2 is moved forward from the state shown in FIG. 7A, the webbing 18 is drawn to the vehicle rear side by the buckle advance / retreat member 12 that rotates integrally with the seat back lower pipe 2a. 11a is lowered and stored in the buckle storage recess 11 as shown in FIG. 7 (b). For this reason, the interference between the seat back 2 and the buckle 5 when the seat back is moved forward can be avoided, and the occurrence of indentation of the seat back 2 can be prevented. Further, the height (the distance from the seating surface 3 a to the bottom surface 11 b) of the buckle storage recess 11 can be suppressed in the longitudinal direction X of the buckle 17, which is a thinner sheet compared to storing in the height direction H of the buckle 17. It can also be applied to the cushion 3.

  As described above, in the buckle mounting structure for the seat belt according to the second embodiment, the buckle storage recess 11 is provided at the rear end of the seating surface 3a of the seat cushion 3, and the buckle storage recess 11 is provided on the vehicle front side of the buckle storage recess 11. An inclined guide surface 11a is provided that is continuous with the bottom surface 11b and the seating surface 3a, rotates integrally with the seat back lower pipe 2a, supports the webbing 18 with the buckle longitudinal direction X facing up and down, and raises the seat back The buckle 17 is pushed out onto the inclined guide surface 11a at the time, and the buckle advance / retreat member 12 for retracting and storing the buckle 17 into the buckle storage recess 11 is provided when the seat back is moved forward.

  Thereby, the interference between the seat back 2 and the buckle 17 when the seat back is moved forward can be avoided, and the occurrence of indentation of the seat back 2 can be prevented. It can also be applied to thin seat cushions. Further, since the buckle 17 is self-supporting by the inclined guide surface 11a, an operation for making the buckle 17 self-supporting is unnecessary. Furthermore, since the buckle 17 is self-supporting with the longitudinal direction X oriented in the vehicle front-rear direction, it does not require time to latch the tongue and is excellent in wearability.

  9 is a partial cross-sectional side view of the rear seat 1 of the vehicle to which the seat belt buckle mounting structure of the third embodiment is applied. FIG. 10 is a plan view of the buckle showing the seat belt buckle mounting structure of the third embodiment. FIG. 11 is a sectional view taken along line S11-S11 in FIG. In addition, about the part which is common in Example 1, it represents with the same name and the same code | symbol, and abbreviate | omits description.

  A cushioning material 22 using urethane having a higher foaming rate than the cushioning material 21 of the other part is disposed on a part of the inside of the skin 20 of the seating surface 3a of the seat cushion 3. For this reason, the hardness of the cushion material 22 is lower than the hardness of the cushion material 21. Further, the seating surface 3b above the cushion material 22 is set at a position lower than the other seating surfaces 3a.

  In the seat cushion 3, a webbing insertion hole 23 penetrating in the vertical direction is formed adjacent to the seating surface 3b above the cushion material 22. The width of the upper end of the webbing insertion hole 23 is narrower than the width direction Y2 of the buckle 24, and the webbing 25 is inserted into the webbing insertion hole 23 with the longitudinal direction X of the buckle 24 facing the vehicle front-rear direction. In the third embodiment, two webbing insertion holes 23, 23 facing the one seating surface 3 b are formed, and the webbings 25, 25 are inserted into the webbing insertion holes 23, 23, respectively.

  A rubber band (support member) 26 that elastically supports the webbing 25 is provided on the inner periphery of the webbing insertion hole 23. The buckle 24 is supported by the rubber band 26 and the bottom end of the buckle 24 is attached to the upper end corner portion of the webbing insertion hole 23 of the seating surface 3a and the seating surface 3b, so that the buckle 24 is maintained in a self-supporting state when the seat back is raised. The self-standing direction of the buckle 24 can be easily adjusted by changing the inclination angle of the webbing insertion hole 23 to which the rubber band 26 is attached. In Example 3, the inclination angle of the webbing insertion hole 23 at the rubber band attachment position is set in a direction away from the seating surface 3b from the upper side to the lower side, and the buckle 24 is set to face the wearer side (the tongue side). Yes.

Next, the operation will be described.
When the seat back 2 is in the rising position A, as shown in FIG. 11A, the buckle 24 elastically supported by the rubber band 26 maintains a self-supporting state. At this time, since the buckle longitudinal direction X faces the vehicle front-rear direction, the wearer can latch the tongue with one hand, and the wearability is excellent.

  Furthermore, since the buckle 24 faces the wearer, even if the two buckles 24, 24 are arranged at substantially the same position as in the third embodiment, the wearer can easily determine the corresponding buckle 24. Further, when the wearer's body touches the buckle 24, the buckle 24 swings its neck flexibly around the support position of the rubber band 26, so that a sense of incongruity due to contact can be reduced.

When the seat back 2 is moved forward from the state of FIG. 11 (a), as shown in FIG. 11 (b), the portion provided with the cushion material 22 of the seat cushion 3 is pushed and crushed by the buckle 24, and the rubber band 26 The buckle 24 is stored between the seat cushion 3 and the seat back 2 by the extension of. For this reason, the interference between the seat back 2 and the buckle 24 when the seat back is moved forward can be avoided, and the occurrence of indentation of the seat back 2 can be prevented. Further, since the buckle 24 is stored with the buckle longitudinal direction X oriented in the vehicle width direction, the height (the distance from the seating surface 3a to the cushion material 21) for storing the buckle 24 is set to the width direction of the buckle 24. Since it can be suppressed to Y2, it can also be applied to a thin seat cushion 3.
When the seat back 2 is raised from the state of FIG. 11 (b), the buckle 24 is automatically restored to the self-supporting state of FIG. 11 (a) by the elastic force of the webbing 25 and the restoring force of the rubber band 26. maintain.

  As described above, in the buckle mounting structure for the seat belt according to the third embodiment, a cushion material having a higher elastic deformation rate than the cushion material 21 of the other portion is formed on a part of the seating surface 3a of the seat cushion 3 on the inner side of the skin 20 22 is formed, a webbing insertion hole 23 penetrating the seat cushion 3 in the vertical direction is formed, and the webbing insertion hole 23 is inserted through the webbing insertion hole 23 with the buckle longitudinal direction X facing the vehicle front-rear direction. The webbing 25 is elastically supported on the inner periphery of the hole 23. When the seat back is raised, the buckle 24 is in a self-supporting state, and when the seat back is tilted forward, the buckle 24 is tilted toward the cushion material 22 and the buckle 24 is moved between the seat back 2 and the seat cushion 3. A rubber band 26 for storing in the space between them was provided.

  Thereby, the interference between the seat back 2 and the buckle 24 when the seat back is moved forward can be avoided, and the occurrence of indentation of the seat back 2 can be prevented. It can also be applied to thin seat cushions. Further, since the buckle 24 is self-supporting due to the elastic force of the webbing 25 and the restoring force of the rubber band 26, an operation for making the buckle 24 self-supporting is unnecessary. Further, since the buckle 24 is self-supporting with the longitudinal direction X directed in the vehicle front-rear direction, it does not require time to latch the tongue and is excellent in wearability.

(Other examples)
The best mode for carrying out the present invention has been described above based on the embodiments. However, the specific configuration of the present invention is not limited to the embodiments and is within the scope of the invention. Any design changes are included in the present invention.

  For example, in the first embodiment, the boot 6 is formed in a cylindrical shape and inserted in accordance with the buckle 5 and the webbing 5a. However, in order to improve workability when the boot 6 is put on the buckle 5 and the webbing 5a, Cuts are made in the length direction. After covering the buckle 5 and the webbing 5a with the notch open, the buckle 5 and the webbing 5a may be covered by engaging the engaging protrusion formed on one of the notches and the engaging hole formed on the other. Good.

  In Example 3, as an example of a space for storing the buckle, a cushion material 22 having a higher elastic deformation rate than the cushion material 21 of the other part is disposed in a part of the seat 20 on the seating surface 3a of the seat cushion 3. As shown in FIG. 12, a gap portion 27 may be provided in a part of the inside of the skin 20 in place of the cushion material 21. Thereby, the same effect as Example 3 can be acquired.

DESCRIPTION OF SYMBOLS 1 Rear seat 2 Seat back 2a Seat back lower pipe 3 Seat cushion 3a Seating surface 3b Seating surface 5 Buckle 5a Webbing 6 Boot (supporting member)
9 Buckle storage recess 9a Bottom surface 9c Inclined surface 11 Buckle storage recess 11a Inclined guide surface 11b Bottom surface 12 Buckle advancement / retraction member 17 Buckle 18 Webbing 21 Cushion material 22 Cushion material 23 Webbing insertion hole 24 Buckle 25 Webbing 26 Rubber band (support member)
27 Cavity

Claims (1)

A buckle storage recess is provided on the seat cushion seating surface,
On the bottom surface of the buckle storage recess, a support member that supports the buckle and is self-supporting is provided.
An inclined surface is set in the buckle housing recess so as to contact the buckle or the support member when the seatback is tilted forward and to rotate the buckle from a state where the longitudinal direction of the buckle faces the vehicle longitudinal direction to the state where the buckle faces the vehicle width direction. ,
The support member is configured to maintain a twisted state in which the longitudinal direction of the buckle is directed in the vehicle front-rear direction when the seatback is raised, and to be twisted in a state in which the longitudinal direction of the buckle is directed in the vehicle width direction when the seatback is tilted forward. A seat belt buckle mounting structure characterized by that.

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