JP5190706B2 - Tongue stopper structure for seat belt device - Google Patents

Description

  The present invention relates to a tongue stopper structure for a seat belt device. More specifically, a belt-like seat belt webbing that restrains the body of a seated occupant to a vehicle seat is provided with a stopper structure for locking the falling movement of a tongue that is an attachment device passed through the seat belt webbing. The present invention relates to a tongue stopper structure of an apparatus.

  Conventionally, in a seatbelt device for a vehicle seat, a stopper for attaching a tongue, which is an attachment tool passed through the seatbelt webbing, so as not to fall when the seatbelt webbing is not attached is provided. There is. Here, the following Patent Document 1 discloses a structure in which the above-described stopper is configured to be a detachable clip type that is attached to the seat belt webbing from the side.

  In this disclosure, the stopper is configured to be elastically hooked on the webbing by being inserted into the seat belt webbing from the side, and the locking position of the tongue is changed by the seated occupant changing the hooking position. It can be changed freely. Thereby, even when the locking position of the tongue described above is set to a high position that is relatively easy to reach in the seat belt webbing when not attached, when pulling the tongue and attaching it to the buckle, The stopper is retracted to a position where it does not interfere with the tongue and can be hung on the lower abdomen of the seated occupant while the seat belt is stretched without slackening.

JP 2003-276558 A

  However, in the prior art disclosed above, in order to change the locking position of the tongue, the stopper must be moved each time, and the operability is poor.

  The present invention has been devised as a solution to the above-described problems, and the problem to be solved by the present invention is that the stopper position of the stopper structure that locks the falling movement of the tongue passed through the seat belt webbing. An object of the present invention is to enable the tongue to be moved to a position beyond the locking position by the stopper structure without changing the angle.

In order to solve the above problems, the tongue stopper structure of the seat belt apparatus of the present invention takes the following means.
First, the first invention is a stopper structure for locking a belt-like seat belt webbing that restrains the body of a seated occupant to a vehicle seat to drop a tongue that becomes a mounting tool passed through the seat belt webbing. This is a tongue stopper structure of a seatbelt device provided with. The stopper structure is configured to prevent the tongue from passing by locking the drop movement by the protruding shape of the locking member attached to the seat belt webbing. The stopper structure maintains the state in which the drop movement of the tongue is locked even if the tongue is pressed against the locking member by its own weight, but at least one member of the tongue or the locking member is locked to the other member. By applying a specific external force for releasing the state, at least one of the members is deformed to allow the tongue to pass in the falling movement direction.

  According to the first invention, the stopper structure for locking the tongue by the protruding shape of the locking member is deformed by applying a specific external force to at least one of these members, The tongue can be allowed to pass through in the direction of falling movement. In this way, the stopper structure is configured to be deformed by applying an external force to break the locking state, so that the tongue is moved to a position beyond the locking position by the stopper structure without changing the stopper position of the tongue. Can be moved.

  Next, according to a second aspect, in the first aspect described above, a member that deforms when a specific external force is applied is a locking member.

  According to the second aspect of the present invention, since the member that is deformed by a specific external force is used as the locking member, a stopper structure that can allow the tongue to move without losing the function of the tongue can be easily configured. Can do.

  Next, according to a third invention, in the first or second invention described above, the stopper structure is configured such that at least one member is perpendicular to the drop movement direction by applying a pressing force to the tongue in the drop movement direction. An inclined surface abutting structure that elastically pushes away in any direction and allows the tongue to pass through. This inclined surface abutment structure is required to apply the pressing force in the return direction applied to the tongue to return the tongue passed in the falling movement direction to the initial position before passing in the falling movement direction. The inclination is set so as to be lighter.

  According to the third aspect of the present invention, when the locking member is passed downward by applying a pressing force to the tongue in the drop movement direction due to the inclined surface abutting structure of the stopper structure, the force is large and the tongue is dropped. When a pressing force is applied in the direction opposite to the moving direction to pass the locking member upward, the force is reduced. Thus, the operating force for returning the tongue to the upper region of the locking member that is a relatively frequently used region is small, and the tongue is moved to the lower region of the locking member that is a relatively less frequently used region. Therefore, the use of the tongue can be improved.

1 is a perspective view illustrating a schematic configuration of a tongue stopper structure of a seat belt device according to Embodiment 1. FIG. It is a perspective view showing the wearing state of a seatbelt device. It is the III-III sectional view taken on the line of FIG. It is sectional drawing showing the state which applied the pressing force to the tongue and operated it and elastically deformed the locking member. It is a schematic block diagram of the tongue stopper structure of the seatbelt apparatus shown as a modification. FIG. 6 is a cross-sectional view showing a state in which a leaf spring is elastically compressed and deformed so as to be moved through a tongue. It is a schematic block diagram of the tongue stopper structure of the seatbelt apparatus shown as another modification. It is sectional drawing showing the state which deform | transformed the latching bag and was made to move the tongue through.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the tongue stopper structure of the seat belt device of the first embodiment will be described with reference to FIGS. The tongue stopper structure of the seat belt device of the present embodiment is provided in a seat belt device 10 provided as an occupant restraint device for restraining the body of a seated occupant P on a vehicle seat 1 as shown in FIG. The mounting bracket (the tongue 13) passed through the belt-shaped seat belt webbing 11 (hereinafter, abbreviated as the webbing 11) serving as a restraining belt is placed at a certain height in the webbing 11 when the mounting bracket is not mounted. It functions as a stopper for locking.

  Here, the vehicle seat 1 is arranged as a second-row seat behind the driver's seat of the vehicle. The seat back 2 serves as a backrest, the seat cushion 3 serves as a seating portion, and the headrest 4 serves as a headrest. And is configured. The above-described seat belt device 10 is passed through a retractor (not shown) serving as a winding device for the webbing 11, a slip joint 12 for guiding the routing path of the webbing 11 fed out from the retractor, and the webbing 11 described above. A tongue 13 serving as a mounting bracket, a buckle 14 fixedly installed on the side of the seat cushion 3 as a mounting tool for the tongue 13, and a protruding locking member for locking the tongue 13 to the webbing 11 15.

  Specifically, the tongue 13 is formed of a convex-shaped metal plate, and a mounting portion in which a square hole is formed in a mountain-shaped portion on the tip side of the metal plate and is inserted into the buckle 14 and mounted. 13A is formed. A long hole 13B serving as a through hole for the webbing 11 is formed through the base portion of the tongue 13 so that the entire base portion is formed as a resin portion 13C covered with resin.

  The webbing 11 is formed by knitting a polyester fiber having excellent tensile strength into a belt shape, and is wound around the above-described retractor (not shown). The end of the webbing 11 drawn out from the retractor is passed from the rear side to the front side with respect to the slip joint 12 provided at the shoulder portion on the outer side of the seat back 2, and from there, the seat back 2 Is extended to the lower side through the backrest surface of the seat cushion 3 and fastened and fixed to the side portion on the outer side of the seat cushion 3.

  The webbing 11 described above is always in a state of receiving a tensile force by being biased in the direction of being wound by a retractor (not shown), and the tension with a constant tension always applied by the tensile force. The arrangement state is maintained. Then, as shown in FIG. 2, the webbing 11 arranged as described above has the seat occupant P gripping the resin portion 13C of the tongue 13 passed through the webbing 11 and pulling it toward the inner side. 14, it is put on the chest or waist of the seated occupant P.

  As a result, the webbing 11 is pressed against the chest and waist of the seated occupant P due to the tension applied by the retractor (not shown), and the body of the seated occupant P is restrained by the seat back 2. It becomes. Here, as shown in FIG. 2, the webbing 11 described above is divided into a shoulder webbing part 11A and a lap webbing part 11B according to the difference in the part applied to the body of the seated occupant P.

  The former shoulder webbing portion 11A is a region portion that is obliquely applied to the chest of the seated occupant P from the shoulder to the waist, and is a region that is defined as a length region from the portion extended from the slip joint 12 to the turn-back portion by the tongue 13 Part. The latter lap webbing portion 11B is a region portion that is applied so as to cross the waist of the seated occupant P, and is a region portion that is defined as a length region from a turning position by the tongue 13 to a fixed end portion on the lower end side.

  Therefore, as can be seen with reference to FIG. 1, the latter lap webbing portion 11 </ b> B has the tongue 13 engaged when the locking position of the tongue 13 by the locking member 15 is set at a high position of the webbing 11, for example. Since it is blocked by the bulging shape of the stop member 15 and cannot be lowered below the bulging shape, the length between the fixed end portion on the lower end side of the webbing 11 and the tongue 13 is increased, and the lap webbing is increased. As shown in FIG. 2, there is a situation where the portion 11B is not applied to the waist while being applied to the waist, that is, the lap webbing portion 11B is loosened.

  However, returning to FIG. 1, in the configuration of the present embodiment, it is possible to move the tongue 13 to the lower side of the locking member 15 by releasing the locking state from the state where the tongue 13 is locked to the locking member 15. It has become. Thereby, for example, when the seat belt device 10 is not attached, the tongue 13 is attached to the buckle 14 even if the tongue 13 is locked at a high position by the attachment position of the locking member 15 to the webbing 11. In doing so, the tongue 13 is passed through the region below the locking member 15 so that the lap webbing portion 11B is stretched against the waist of the seated occupant P.

  Hereinafter, the stopper structure of the tongue 13 by the locking member 15 described above will be specifically described. Here, as shown in FIG. 3, the locking member 15 is formed of rubber, and is provided in a state of protruding from both the front and back surface portions of the webbing 11. The locking member 15 is formed in a shape that protrudes larger than the long hole 13B of the tongue 13, and is configured to prevent the tongue 13 from moving down by preventing the long hole 13B from passing therethrough.

  The above-described locking member 15 is normally in a state in which even if the tongue 13 is pressed by its own weight due to its elastic force, the protruding shape prevents passage of the tongue 13 and locks the falling movement. Is supposed to maintain. However, as shown in FIG. 4, the locking member 15 is pushed down by the human force against the elastic force, so that the inner circumferential surface of the long hole 13 </ b> B of the tongue 13 is pressed. Compressed and deformed in such a manner that it is pressed inward and elastically squeezed, and the passage of the tongue 13 is allowed along with the compression deformation. Here, the above-described force for pushing the tongue 13 downward corresponds to a specific external force in the present invention.

  Here, returning to FIG. 3, the above-described locking member 15 is formed such that the upper surface portion in the drawing that locks the tongue 13 is an inclined surface (upper inclined surface 15 </ b> A) that hangs downward. . Further, the tongue 13 is warped in such a way that the inner peripheral surface of the elongated hole 13B that receives the upper inclined surface 15A of the locking member 15 is curved so that the hole shape expands toward the upper and lower openings in the figure. It is formed in a different shape. Thereby, as shown in FIG. 4, the above-described locking member 15 is perpendicular to the pressed direction when the upper inclined surface 15 </ b> A receives a force pressed downward from the tongue 13. In response to the pressing force in the inner direction, it is compressed and deformed in a constricted form allowing the tongue 13 to pass through.

  Therefore, by performing a moving operation to push the tongue 13 downward as it is, the tongue 13 can be passed through the locking member 15 and the tongue 13 can be moved to the region portion below the locking member 15. Therefore, as shown in FIG. 2, the tongue 13 is engaged in each case where a child seat is attached to the vehicle seat 1, a small person of a physique is seated, or a person of a large physique is seated. The wrap webbing portion 11B can be put on the waist of the seated occupant P, the child seat, and the like by freely moving to the optimum passing position without being held at the locking position of the stop member 15.

  Then, as shown in FIG. 3, when the tongue 13 (imaginary line state) passed through the lower side of the locking member 15 is returned to the upper area of the locking member 15, the tongue is similarly changed. What is necessary is just to operate so that 13 may be pushed up as it is. Here, the surface portion on the lower side from the protruding shape portion of the locking member 15 described above is formed as an inclined surface (lower inclined surface 15B) inclined so that the protruding shape gradually attenuates. And the inclination of this lower side inclined surface 15B is formed more gently than the upper side inclined surface 15A mentioned above.

  As a result, the force necessary to press the tongue 13 upward and pass it through the upper side of the locking member 15 is used to press the tongue 13 downward and pass it through the lower side of the locking member 15. It is lighter than the necessary pressing force, and the operation of returning the tongue 13 to the upper position of the locking member 15 can be performed more easily than the operation of dropping the tongue 13 downward.

  Thus, according to the tongue stopper structure of the seat belt device of the present embodiment, the stopper structure that locks the tongue 13 with the protruding shape of the locking member 15 applies the external force in the direction in which the tongue 13 is pushed down. The stop member 15 is elastically deformed, and the tongue 13 is allowed to pass through in the direction of falling movement. As described above, the stopper structure is configured to be deformed by applying an external force so that the locking state is broken, so that the stopper position of the tongue 13 is not changed and the position beyond the locking position by the stopper structure is reached. The tongue 13 can be moved.

  In addition, since the member deformed by the external force is not the tongue 13 but the locking member 15, the stopper structure that allows the passage of the tongue 13 without impairing the function of the tongue 13 can be simply configured. can do. Further, the tongue 13 is brought into contact with the upper inclined surface 15A and the lower inclined surface 15B of the locking member 15, and is moved to the tongue 13 by the inclined surface abutting structure configured to press and compress them. When applying a pressing force in the direction to the lower side of the locking member 15, the force is large, and when applying a pressing force to the tongue 13 in the direction opposite to the falling movement direction and passing it through the upper side of the locking member 15. The applied force becomes smaller.

  Thus, the operation force for returning the tongue 13 to the upper region of the locking member 15 that is a relatively frequently used region is small, and the lower region of the locking member 15 that is a relatively less frequently used region. Since the operation force for moving the tongue 13 is increased, the use of the tongue 13 can be improved. Further, since the locking member 15 is formed of rubber that is an elastic body, when the seat belt device 10 is worn, the contact of the locking member 15 against the body of the seated occupant P is lessened and it is difficult to feel a foreign object feeling. can do.

  Next, the tongue stopper structure of the seatbelt device according to the second embodiment will be described with reference to FIGS. In the present embodiment, portions having substantially the same configuration and operational effects as those of the tongue stopper structure of the seat belt apparatus shown in the first embodiment are described with the same reference numerals. Will be omitted and the different parts will be described in detail.

  In the tongue stopper structure of the seat belt device of the present embodiment, as shown in FIG. 5, the locking member provided on the webbing 11 is formed such that the short plate portion 16A and the long plate portion 16B are opened like a tongue. It is formed by the formed leaf spring 16. The leaf spring 16 is configured to lock the dropping movement of the tongue 13 with the tongue 13 in contact with the tip of the short plate portion 16A and the long plate portion 16B. Then, from this state, as shown in FIG. 6, the short plate portion 16 </ b> A and the long plate portion 16 </ b> B are elastically constricted and deformed so as to be sandwiched between fingers, whereby the leaf spring 16 has the length of the tongue 13. It will be in the state which can pass the hole 13B. Here, the above-described force that sandwiches and deforms the leaf spring 16 corresponds to a specific external force in the present invention.

  Therefore, the tongue 13 can be passed through the lower region of the leaf spring 16 by moving the tongue 13 downward from this state. As shown in FIG. 5, the tongue 13 (imaginary line state) passed through the lower side of the leaf spring 16 as described above is returned to the region on the upper side of the leaf spring 16. This time, the tongue 13 may be operated so as to be pushed upward as it is. As a result, the short plate portion 16A and the long plate portion 16B that are open in the shape of a tongue enter into the long hole 13B of the tongue 13 and are elastically constricted. The operation of returning to the upper 16 region can be performed.

  Subsequently, the tongue stopper structure of the seat belt device of Example 3 will be described with reference to FIGS. In the present embodiment, portions having substantially the same configuration and operational effects as those of the tongue stopper structure of the seat belt apparatus shown in the first embodiment are described with the same reference numerals. Will be omitted and the different parts will be described in detail.

  In the tongue stopper structure of the seat belt device of the present embodiment, as shown in FIG. 7, the locking member provided on the webbing 11 is formed by a locking bag 17 filled with a gel-like viscous fluid 17A. ing. The locking bag 17 is normally configured to lock the tongue 13 in a state where the tongue 13 is in contact with the upper surface portion thereof. Then, from this state, as shown in FIG. 8, by applying a pressing force that pushes the tongue 13 downward, the locking bag 17 changes its shape while flowing the internal viscous fluid 17 </ b> A. It becomes the shape which can let the long hole 13B pass. Here, the above-described force for pushing the tongue 13 downward corresponds to a specific external force in the present invention.

  Therefore, the tongue 13 can be passed through the lower region of the locking bag 17 by pushing the tongue 13 downward as it is. In the present embodiment, as shown in FIG. 7, the tongue 13 (in the phantom line state) passed through the lower side of the locking bag 17 as described above is transferred to the upper region of the locking bag 17. In the case of returning, it is sufficient to operate the tongue 13 as it is in the same way as above. Accordingly, the locking bag 17 can be changed into a shape that allows the long hole 13B of the tongue 13 to pass through in the same manner as shown in FIG. The operation to return to can be performed.

  As mentioned above, although embodiment of this invention was described using the three Examples, this invention can be implemented with various forms other than the said Example. For example, in the first embodiment, the locking member 15 is made of rubber. However, the resin claw member may be provided so as to be able to bend and deform. Further, instead of the locking bag 17 shown in the third embodiment, a clay member may be provided. In addition, although the locking members (locking member 15, leaf spring 16, locking bag 17) illustrated in each embodiment are all illustrated at positions exposed from the webbing 11, A bag-like part having an internal space may be formed in the part, and various types of locking members may be provided inside the bag-like part. Thereby, a locking member can be provided with good appearance. In each of the above embodiments, the members that are deformed by the force applied to the tongue are the locking members (the locking member 15, the leaf spring 16, and the locking bag 17). However, the tongue is deformed. It may be configured. Further, both the tongue and the locking member may be deformed together.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 3 Seat cushion 4 Headrest 10 Seat belt device 11 Seat belt webbing 11A Shoulder webbing part 11B Lap webbing part 12 Slip joint 13 Tongue 13A Mounting part 13B Long hole 13C Resin part 14 Buckle 15 Locking member 15A Upper side Inclined surface 15B Lower inclined surface 16 Leaf spring (locking member)
16A Short plate portion 16B Long plate portion 17 Locking bag (locking member)
17A Viscous fluid P Seated occupant

Claims (3)

A tongue of a seat belt device provided with a stopper structure for locking a drop movement of a tongue serving as a wearing tool passed through the seat belt webbing to a belt-like seat belt webbing that restrains the body of a seated occupant to a vehicle seat A stopper structure,
The stopper structure is configured to prevent the tongue from passing by the protruding shape of a locking member attached to the seat belt webbing, thereby locking the dropping movement. Even if it is pressed against the stop member by its own weight, the state in which the drop movement of the tongue is locked is maintained, but at least one member of the tongue or the lock member is released from the locked state with respect to the other member. A tongue stopper structure for a seatbelt device, wherein a specific external force is applied to deform at least one of the members to allow the tongue to pass in the falling movement direction. . A tongue stopper structure for a seat belt device according to claim 1,
A tongue stopper structure for a seat belt device, wherein the member that deforms when the specific external force is applied is the locking member. A tongue stopper structure for a seat belt device according to claim 1 or 2,
The stopper structure is configured such that when the pressing force is applied to the tongue in the falling movement direction, the at least one member is elastically pushed away in a direction perpendicular to the falling movement direction, thereby allowing the tongue to pass through. The inclined surface abutting structure is configured such that the pressing force in the return direction applied to the tongue in order to return the tongue that has been passed in the falling movement direction to the initial position before the passage. A tongue stopper structure for a seat belt device, wherein the inclination is set so as to be lighter than a pressing force required when applied in the falling movement direction.

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