JP5961545B2 - Tongue for seat belt device and seat belt device - Google Patents

Description

  The present invention relates to a tongue for a seat belt device applied to a seat belt device for a vehicle and a seat belt device provided with such a tongue.

  The seat belt device tongue disclosed in Patent Document 1 (referred to as “safety belt arrangement” in Patent Document 1) includes a clamp member (referred to as “clamp element” in Patent Document 1). The clamp member is biased toward the front end side of the tongue for the seatbelt device by the biasing force of the spring, whereby the clamp member is released from the inner peripheral portion of the opening formed in the main body portion of the tongue for the seatbelt device. It is separated. When the clamp member is pulled by webbing (referred to as “safety belt” in Patent Document 1) and approaches the inner peripheral portion of the opening against the biasing force of the spring, the inner peripheral portion of the opening and the clamp member Clamp the webbing.

US Pat. No. 5,471,717

  By the way, the tongue for a seat belt apparatus disclosed in Patent Document 1 includes a fixing element. When the finger of the fixed element and the finger of the clamp member face each other, movement of the clamp member in a direction approaching the inner peripheral portion of the opening is restricted. That is, in the tongue for the seat belt device disclosed in Patent Document 1, the webbing is prevented or suppressed from being inadvertently clamped by providing such a configuration.

  However, providing such a configuration increases the size of the tongue for the seat belt device.

  In consideration of the above fact, the present invention can prevent or suppress inadvertent movement in the direction for clamping the webbing without increasing the physique, and is relatively small after the clamp member starts moving. It is an object to obtain a tongue for a seat belt device and a seat belt device in which a clamp member can be moved by a load.

The tongue for a seat belt device according to the first aspect of the present invention has an insertion portion that can be inserted into a buckle, and is provided on the webbing so that the webbing passes through the inside and is movable in the longitudinal direction of the webbing. And a clamp member that is provided on the tongue main body, is wound around the webbing and is pulled by the webbing to move in a predetermined direction relative to the tongue main body and clamps the webbing together with the tongue main body And a biasing means that is provided on one of the clamp member and the tongue main body and biases the clamp in a direction opposite to the predetermined direction by applying a biasing force to the other of the other. , Provided on one of the other, and engaged with the biasing means in a state before the clamp member moves in the predetermined direction. And to regulate that indirectly the clamping member by the bias means moves the predetermined direction, said urging means via the predetermined size or more tensile force said clamp member from said webbing said biasing means to release the movement restriction of the clamping member by elastically deforming by being applied to a further, the biasing means is applied to said one of the other in a state in which the movement restriction has been released Restricting means for setting the urging force to be less than the predetermined magnitude.

  In the tongue for the seatbelt device according to the first aspect of the present invention, the insertion portion of the tongue main body is inserted into the buckle. If the webbing is hung around the occupant's body seated on the seat in this state, the webbing is attached to the occupant's body, and the occupant's body is restrained by the webbing.

  Since the webbing is hung around a clamp member provided on the tongue main body, for example, when the occupant pulls the webbing when mounting the webbing on the body, the clamp member is pulled by the webbing. However, any one of the clamp member and the tongue main body is provided with a biasing means, and this biasing force biases the clamp member in a direction opposite to the predetermined direction.

  In addition, a restriction means is provided on the other of the clamp member and the tongue main body. When the restriction means is engaged with the biasing means, the restriction means is indirectly clamped via the biasing means. The movement of the member in a predetermined direction (that is, the direction in which the clamp member clamps the webbing with the tongue main body) is restricted. Thereby, a clamp member does not move carelessly in a predetermined direction. For this reason, in this state, the tongue main body can move freely along the webbing, and the insertion portion of the tongue main body can be easily attached to the buckle.

  On the other hand, for example, when the vehicle body suddenly decelerates and the occupant's body attempts to move inertially forward of the vehicle, the webbing is pulled by the occupant's body. Since the webbing is wound around a clamp member provided on the tongue main body, when the webbing is pulled by the occupant's body, the clamp member is pulled by the webbing. As described above, the movement of the clamp member in the predetermined direction is indirectly restricted by the restricting means via the biasing means. For this reason, the pulling force (load) applied to the clamp member tends to elastically deform the urging means.

  When this pulling force (load) exceeds a certain level and elastic deformation caused by this occurs in the biasing means, the indirect restriction of the clamping member via the biasing means by the restricting means is released, and the clamping member It moves in a predetermined direction, that is, a direction in which the webbing is clamped with the tongue body.

  Further, when the clamp member moves, the urging force applied to one of the other by the urging means becomes smaller than the predetermined magnitude. For this reason, in order for the clamp member to start moving in a predetermined direction, the clamp member needs a pulling force (load) of a certain amount or more, but after the clamp member starts moving in the predetermined direction, It can move in a predetermined direction with a smaller pulling force than the beginning. When the clamp member moves in a predetermined direction in this way, the webbing is clamped by the clamp member and the tongue main body.

  As a result, for example, a part of the webbing that restrains the occupant's shoulder or chest, so-called "shoulder webbing" passes through the tongue body of the tongue body and moves to the part of the tongue that restrains the occupant's waist, so-called "lap webbing". Thus, the lap webbing can be prevented from becoming longer than before.

  Here, as described above, in the tongue for the seat belt device according to the present invention, the regulating member can regulate the movement of the clamp member via the urging member, and the urging member is elastically deformed by a tensile force of a certain size or more. In this case, it is sufficient that the movement restriction of the clamp member can be canceled. For this reason, the structure of a control member can be simplified and the enlargement of the physique of the tongue for seatbelt apparatuses which concerns on this invention can be prevented or suppressed.

According to a second aspect of the present invention, the tongue for a seat belt device according to the first aspect of the present invention is the first aspect of the present invention, wherein the restricting means faces the biasing means in a state before the clamp member moves, The clamp member directly or indirectly regulates the movement in the predetermined direction by coming into contact with the urging means, and the urging means that receives the load of a certain magnitude or more is slid while elastically deforming. a surface, together with the biasing means is formed continuously with the restricting surfaces in sliding direction which slides on the regulating surface while elastically deformed, up rests said biasing means slides on the regulating surface, the clamping member rests up state is provided with the regulating portion configured including a sliding surface sliding said urging means by moving in a predetermined direction.

According to the tongue for the seat belt device according to the second aspect of the present invention, the restricting portion constituting the restricting means includes a restricting surface that faces the biasing means in a state before the clamp member moves in a predetermined direction. Yes. When the clamp member tries to move in a predetermined direction, the urging means comes into contact with the restriction surface of the restriction portion. Thus, when the urging means abuts on the regulating surface, the movement of the clamping member in the predetermined direction or the movement of the urging means in accordance with the movement of the clamping member in the predetermined direction is restricted.

In this way, when the pulling force applied from the webbing to the clamp member becomes equal to or greater than a certain level in a state where the urging means is in contact with the restriction surface, the urging means is elastically deformed while sliding on the restriction surface. The biasing means that has slid on the regulation surface in this way is placed on a sliding surface that is inclined with respect to the regulation surface. When the clamp member further moves in a predetermined direction in a state where the urging means is placed on the sliding surface, the urging means moves on the sliding surface.

According to a third aspect of the present invention, the tongue for a seat belt device according to the second aspect of the present invention is the first aspect of the present invention according to the second aspect, wherein the biasing means slides on the sliding surface so as to be separated from the regulating surface . the sliding surface so that energization means is elastic deformation against the biasing force of the biasing means is constituted.

According to the tongue for the seat belt device according to the third aspect of the present invention, when the biasing means slides so as to be separated from the regulation surface on the sliding surface of the regulation part constituting the regulation means, the biasing means is Ru is elastically deformed against the biasing force. For this reason, when it becomes impossible to pull the clamp member in a predetermined direction, the urging means slides on the sliding surface toward the regulating surface by its restoring force (elastic force). As a result, the clamp member moves in a direction opposite to the predetermined direction. Thus, the seatbelt tongue according to the present invention does not require a special operation for returning the clamp member that has moved in a predetermined direction to the original position.

The tongue for a seat belt device according to a fourth aspect of the present invention is the tongue according to any one of the first to third aspects, wherein the urging means is configured such that the base end side is the clamp member and the Locked by one of the tongue main bodies and elastically deformed so that the distal end side is curved around an axis whose axial direction is the width direction with respect to the proximal end side by a load received on the distal end side from the restricting means. there is a leaf spring.

  According to the tongue for a seat belt apparatus according to the fourth aspect of the present invention, the urging means is a leaf spring, and its proximal end is locked to one of the clamp member and the tongue main body. The distal end side of the leaf spring is around the axis whose axial direction is the width direction with respect to the proximal end side by receiving a load from the restricting means provided on the other of the clamp member and the tongue main body. Elastically deforms so that it bends.

  Thus, when the urging means is a leaf spring, the elastic deformation is easily limited to a curve around an axis with the width direction of the leaf spring as the axial direction. That is, the urging means is not inadvertently elastically deformed in the other direction.

  For the seat belt device according to the present invention as set forth in claim 5, the front side is a webbing that is directly or indirectly locked to the seat or the vehicle body of the vehicle at the side of the seating position of the occupant in the vehicle seat, The buckle provided on the opposite side to the locking position on the front end side of the webbing via the seating position, and the tongue for the seat belt device according to any one of claims 1 to 4. I have.

  In the seat belt device according to the fifth aspect, the front end side of the webbing is directly or indirectly locked to the seat or the vehicle body of the vehicle on the side of the seating position of the occupant in the vehicle seat. The seat belt device is provided with a buckle provided on the opposite side of the seating position of the front end of the webbing through the seating position of the passenger in the seat in a state where the webbing is wound around the body of the passenger seated on the seat When the tongue is attached, the seat belt device tongue is held by the buckle, and the webbing is attached to the occupant's body.

  Here, the tongue for the seat belt apparatus constituting the seat belt apparatus according to the present invention has been described above. The tongue for a seat belt device according to any one of claims 1 to 4. For this reason, it has been described above. The same effect as the present invention according to any one of claims 1 to 4 is exhibited, and as a result, it is described above. The same effect as that of the present invention described in any one of claims 1 to 4 can be obtained.

  As described above, in the present invention, no special operation is required, and a relatively large load is required when the clamp member starts moving in the direction for clamping the webbing, and the clamp member starts moving. After that, the clamp member can be moved with a relatively small load.

It is a figure from the front of a seat which shows roughly composition of a seat belt device to which a tongue for a seat belt device concerning a 1st embodiment is applied. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view schematically showing a configuration of a tongue for a seat belt device according to a first embodiment with a part broken away. In front sectional view of the tongue for a seat belt device according to the first embodiment, (A) shows the cross-sectional view taken along the center of the clamp member, (B) is a regulating means side provided in the clamping member A cut cross-sectional view is shown. It is sectional drawing corresponding to FIG. 3 which shows the state which the clamp member clamped webbing. It is a disassembled perspective view which shows schematically the tongue for seatbelt apparatuses which concerns on 2nd Embodiment. It is front sectional drawing of the tongue for seatbelt apparatuses which concerns on 2nd Embodiment. It is sectional drawing corresponding to FIG. 6 which shows the state which the clamp member clamped webbing. It is a disassembled perspective view which shows schematically the tongue for seatbelt apparatuses which concerns on 3rd Embodiment. It is front sectional drawing of the tongue for seatbelt apparatuses which concerns on 3rd Embodiment. It is sectional drawing corresponding to FIG. 9 which shows the state which the clamp member clamped webbing. It is sectional drawing to which the part provided with the urging means was expanded.

  Next, each embodiment of the present invention will be described. It should be noted that the same reference numerals are given to portions that are basically the same as those of the above-described embodiment than the embodiment described in the following description of each embodiment, and detailed description thereof is omitted. .

<Configuration of First Embodiment>
FIG. 1 is a front view schematically showing the overall configuration of a seat belt apparatus 12 using a seat belt apparatus tongue 10 (hereinafter simply referred to as “tang 10”) according to the first embodiment.

  As shown in this figure, the seat belt device 12 includes a webbing retractor 14 as webbing storage means. The webbing take-up device 14 is fixed to the vehicle body constituting the vehicle, for example, on the lower end side of the center pillar of the vehicle. The webbing take-up device 14 is provided with a spool (not shown) so as to be rotatable around an axis whose longitudinal direction is the longitudinal direction of the vehicle, for example, and the spool is formed in a long belt shape having flexibility. The base end side in the longitudinal direction of the webbing 16 is locked.

  The base end side in the longitudinal direction of the webbing 16 is stored while being wound around the outer periphery of the spool. The front end side of the spool in the webbing 16 is pulled out upward of the vehicle along the center pillar, passes through a shoulder anchor 18 provided in the vicinity of the upper end portion of the center pillar, and is folded back downward of the vehicle. The front end of the webbing 16 that is turned downward is locked to an anchor 22 fixed to the vehicle body on the side of the vehicle seat 20.

  In the present embodiment, the webbing take-up device 14 and the anchor 22 are fixed to the vehicle body side. However, for example, the webbing take-up device 14 may be built in the seat back 24 constituting the seat 20, or the webbing take-up device 14 may be provided behind the seat back 24. . Further, the anchor 22 may be configured to be attached to a member constituting the skeleton of the seat 20 or the like instead of the vehicle body.

  The tongue 10 according to the present embodiment is provided between the tip of the webbing 16 (the portion locked to the anchor 22) and the shoulder anchor 18. Corresponding to the tongue 10, a buckle 26 is fixed to a member constituting the skeleton of the vehicle body or the seat 20 on the side opposite to the position where the webbing retractor 14 and the anchor 22 are disposed via the seat 20.

  Although details will be described later, the tongue 10 can be attached to the buckle 26, and the occupant 30 seated on the seat cushion 28 of the seat 20 pulls out the webbing 16 from the spool of the webbing retractor 14, and the webbing 16 When the tongue 10 is mounted on the buckle 26 in a state where it is hung on the body from the front, the webbing 16 is mounted on the body of the occupant 30. In this state, the lap webbing 32 is defined between the tongue 10 and the anchor 22 in the webbing 16, the waist of the occupant 30 is restrained from the front, and the shoulder webbing 34 is defined between the shoulder anchor 18 and the tongue 10 in the webbing 16. Then, the shoulder portion and chest portion of the occupant 30 are restrained from the front.

  The seat belt device 12 of the present embodiment has a configuration corresponding to a single seat 20 such as a driver's seat or a passenger seat of a vehicle, for example. The present invention can be applied to bench seats. When the present invention is applied to such a bench seat, the webbing retractor 14 and the seat back 24 are provided on one side in the seat width direction with respect to the seating position of the occupant 30 on the bench seat, and the buckle 26 is provided on the other side. Is provided.

<Configuration of tongue 10>
2 shows an outline of the configuration of the tongue 10 in an exploded perspective view, and FIG. 3 shows a configuration of the tongue 10 in a side sectional view.

  As shown in this figure, the tongue 10 is provided with a core metal 42 constituting a tongue main body 40. The core metal 42 is formed by punching a metal flat plate and further bending it. The metal core 42 includes an insertion portion 44, and when the tongue 10 is attached to the buckle 26, the insertion portion 44 is inserted into the buckle 26 from an opening formed in the buckle 26. A through hole 46 is formed in the insertion portion 44. When the insertion portion 44 is inserted into the buckle 26, a latch provided on the buckle 26 enters the through hole 46. When the insertion part 44 tries to come out of the buckle 26, the movement of the insertion part 44 in the direction in which the latch interferes with the inner peripheral part of the through hole 46 and comes out of the buckle 26 is restricted. As a result, the tongue 10 is attached to the buckle 26.

  Further, a base end side of the core metal 42 from the insertion portion 44 (a side opposite to the insertion direction when the tongue 10 is inserted into the buckle 26) is a base portion 48. As shown in FIG. 3, the base 48 has a concave shape that opens toward one side in the thickness direction of the insertion portion 44 (the left side in each of FIGS. 3 and 4). A through hole 52 is formed in the bottom plate 50 constituting the base 48 so as to penetrate the bottom plate 50 in the thickness direction. Further, in the concave base 48, a through hole 56 is formed in the side wall 54 that extends from the side opposite to the insertion portion 44 of the bottom plate 50 to one side in the thickness direction of the bottom plate 50 (left side in each of FIGS. 3 and 4). Is formed so as to penetrate the side wall 54 in the thickness direction (vertical direction in each of FIGS. 3 and 4).

  The base portion 48 having such a configuration is covered with a covering portion 62 formed of a synthetic resin material. A space corresponding to the space between the side wall 54 of the base portion 48 and the insertion portion 44 in the covering portion 62 is a clamper accommodating portion 64. Further, a webbing passage portion 66 is formed in the covering portion 62. The webbing passage portion 66 is formed by covering the inner peripheral portion of the above-described through-hole 52 with a synthetic resin material constituting the covering portion 62, and a clamper accommodating portion 64 and a covering portion 62 that are inside the covering portion 62. It communicates with the outside.

  In addition, a webbing passage portion 68 is formed in the covering portion 62. The webbing passage portion 68 is formed by covering the inner peripheral portion of the above-described through-hole 56 with a synthetic resin material constituting the covering portion 62. In the webbing 16 described above, the shoulder webbing 34 passes through the webbing passage portion 68 from the outside of the covering portion 62 and enters the inside of the clamper accommodating portion 64, and further passes through the webbing passage portion 66 and extends to the outside of the covering portion 62. The portion is a lap webbing 32.

  A clamper 72 as a clamp member is provided inside the clamper housing portion 64. In the present embodiment, the clamper 72 is formed entirely by molding a synthetic resin material. The clamper 72 includes a clamper body 74. The clamper body 74 is formed in a plate shape whose thickness direction is along the thickness direction of the bottom plate 50 described above. The clamper body 74 is in sliding contact with the bottom surface of the clamper accommodating portion 64, that is, the portion covering the bottom plate 50 in the covering portion 62, and is in the direction of contacting and separating from the webbing passage portion 68 along the bottom surface of the clamper accommodating portion 64. It is possible to move to. Hereinafter, the direction approaching the webbing passage portion 68 along the bottom surface of the clamper accommodating portion 64 in the moving direction of the clamper 72 (upward in each of FIGS. 3 and 4) is referred to as “clamp direction” for convenience.

  A jaw 76 is formed continuously from the end of the clamper body 74 opposite to the webbing passage 68 toward the inside of the webbing passage 66. Between the webbing passage portion 68 and the webbing passage portion 66, the webbing 16 is wound around the clamper main body 74 and the jaw portion 76 of the clamper 72.

  When the clamper 72 slides in the clamping direction until the jaw portion 76 contacts the inner end of the webbing passage portion 66 on the side wall 54 side (the upper end of the webbing passage portion 66 in each of FIGS. 3 and 4), the jaw portion of the clamper main body 74 The end opposite to 76 and the portion of the covering portion 62 covering the side wall 54 clamp the webbing 16, and the webbing 16 moves in the longitudinal direction (in other words, along the longitudinal direction of the webbing 16). (Tang 10 moves relative to webbing 16).

  On the other hand, a leaf spring 82 as an urging means is provided inside the clamper accommodating portion 64. As shown in FIG. 2, the base portion of the leaf spring 82 is fixed on the webbing passage portion 68 side on the bottom surface of the clamper housing portion 64. The leaf spring 82 extends from the portion fixed to the bottom surface of the clamper housing portion 64 in a direction generally opposite to the clamping direction and away from the bottom surface of the clamper housing portion 64.

  An engaging portion 92 as a restricting means is formed on the side of the clamper 72 in the width direction of the clamper main body 74 (the front side and the depth side in FIGS. 3 and 4) corresponding to the tip of the leaf spring 82. . The surface of the engaging portion 92 on the webbing passage portion 68 side is a restricting surface 94, and the tip of the leaf spring 82 abuts.

  On the other hand, the surface of the engaging portion 92 opposite to the bottom surface of the clamper accommodating portion 64 is a return slope 96 as a sliding surface. The leaf spring 82 can be placed on the return slope 96 by being elastically deformed against the elastic force from a state in which the tip of the leaf spring 82 is in contact with the regulating surface 94. Further, the return slope 96 is inclined so as to gradually move away from the bottom surface of the clamper accommodating portion 64 in the direction opposite to the clamping direction. For this reason, when the clamper 72 slides in the clamping direction with the tip of the leaf spring 82 resting on the return slope 96, the leaf spring 82 is gradually elastically deformed so that the tip is separated from the bottom surface of the clamper housing portion 64.

<Operation and Effect of First Embodiment>
Next, the operation and effect of the present embodiment will be described.

  In the seat belt device 12 to which the tongue 10 is applied, when the occupant 30 seated on the seat cushion 28 of the seat 20 wears the webbing 16 on the body, first, the webbing 16 is attached together with the tongue 10 while holding the tongue 10. pull. By pulling the webbing 16, the webbing 16 is pulled out from the spool of the webbing take-up device 14. When the occupant 30 hangs the webbing 16 on the body in front of the body with the webbing 16 pulled out in this way, and the insertion part 44 of the tongue 10 is inserted into the buckle 26 in this state, the tongue 10 is held by the buckle 26. The webbing 16 is attached to the body of the occupant 30.

  When the webbing 16 is attached to the body of the occupant 30, the portion of the webbing 16 between the tongue 10 and the anchor 22 is a lap webbing 32, and the waist of the occupant 30 is restrained by the lap webbing 32 from the front or the upper side of the seat 20. Is done. On the other hand, the portion of the webbing 16 between the tongue 10 and the shoulder anchor 18 is a shoulder webbing 34, and the shoulder and chest of the occupant 30 are restrained by the shoulder webbing 34 from the front of the seat 20.

  By the way, when the occupant 30 wears the webbing 16, when the tongue 10 is gripped and the webbing 16 is pulled together with the tongue 10, the webbing 16 pulls the clamper 72 in the clamping direction. Here, in the present embodiment, the tip of the leaf spring 82 is in contact with the restriction surface 94 of the engaging portion 92 of the clamper 72. For this reason, as described above, even if the clamper 72 is pulled by the webbing 16, the movement of the clamper 72 in the clamping direction is restricted. Thereby, the webbing 16 is not clamped by the clamper 72 and the portion covering the side wall 54 in the covering portion 62. Therefore, in this state, the webbing 16 can pass through the webbing passage portion 68 in the longitudinal direction, and the occupant 30 can easily wear the webbing 16.

  On the other hand, for example, when the vehicle rapidly decelerates with the webbing 16 attached, both the lap webbing 32 and the shoulder webbing 34 of the webbing 16 are pulled forward of the seat 20 by the body of the occupant 30. When the lap webbing 32 and the shoulder webbing 34 pull the clamper 72 in this way, the lap webbing 32 and the shoulder webbing 34 pull the clamper 72 in the clamping direction.

  When the pulling force from the lap webbing 32 and the shoulder webbing 34 exceeds a predetermined magnitude, the leaf spring 82 is elastically deformed while the tip is in contact with the regulating surface 94, and the restoring slope of the engaging portion 92 is caused by the restoring force. It goes up to 96. In this state, when the lap webbing 32 and the shoulder webbing 34 further pull the clamper 72, the clamper 72 slides in the clamping direction, and the webbing 16 is clamped by the clamper 72 and the portion covering the side wall 54 of the covering portion 62. As a result, it is possible to prevent or suppress the portion of the webbing 16 on the shoulder webbing 34 side from passing through the clamper accommodating portion 64 and moving to the lap webbing 32 side.

  Further, as described above, when the clamper 72 slides in the clamping direction with the tip of the leaf spring 82 resting on the return slope 96, the leaf spring 82 is elastically deformed so that the tip is separated from the bottom surface of the clamper accommodating portion 64. To do. The elastic deformation of the leaf spring 82 from this state is a smaller deformation than the elastic deformation required from the state where the tip of the leaf spring 82 is in contact with the regulating surface 94 of the engaging portion 92 to rise onto the return slope 96. For this reason, even if the pulling force with which the lap webbing 32 and the shoulder webbing 34 pull the clamper 72 is smaller than before, the clamper 72 can be moved in the clamping direction.

  Further, when the clamper 72 slides in the clamping direction after the tip of the leaf spring 82 is placed on the return slope 96, the leaf spring 82 is gradually elastically deformed and the elastic force of the leaf spring 82 is increased. This elastic force presses the return slope 96 and tries to slide the clamper 72 in the direction opposite to the clamping direction. For this reason, when the application of the tensile force from the lap webbing 32 and the shoulder webbing 34 to the clamper 72 is canceled, the clamper 72 slides in the direction opposite to the clamping direction by the pressing force from the leaf spring 82. As a result, the original state, that is, the state in which the tip of the leaf spring 82 abuts on the restriction surface 94 of the engaging portion 92 can be restored.

  Next, a second embodiment will be described.

<Second Embodiment>
FIG. 5 is an exploded perspective view schematically showing the configuration of a seat belt device tongue 110 according to the present embodiment (hereinafter simply referred to as “tang 110”). FIGS. 6 and 7 show the tongue 110. This configuration is shown in a side sectional view.

  As shown in these drawings, the tongue 110 includes a clamper 112 as a clamp member instead of the clamper 72. The clamper 112 is formed in a cylindrical shape penetrating along the width direction of the portion of the webbing 16 that passes through the inside of the clamper accommodating portion 64. Similarly to the clamper 72 in the first embodiment, the clamper 112 can also slide along the bottom surface of the clamper accommodating portion 64 in a direction toward and away from the webbing passage portion 68. As shown in FIG. When the webbing 16 is slid in the direction in which the webbing passage part 68 approaches the webbing passage part 68, that is, in the clamping direction, the webbing 16 is clamped by the part on the webbing passage part 68 side of the clamper 112 and the part covering the side wall 54. Can be regulated or restrained from moving in the longitudinal direction (in other words, the tongue 10 moves relative to the webbing 16 along the longitudinal direction of the webbing 16).

  The clamper 112 is provided with a leaf spring 114 as an urging member. An insertion portion 116 is formed at the base of the leaf spring 114. The insertion portion 116 is fitted and inserted into the clamper 112 from the opening end of the clamper 112, whereby the leaf spring 114 is attached to the clamper 112. The front end side of the leaf spring 114 extends toward the webbing passage portion 68 side.

  An engaging portion 122 as a restricting means is formed on the webbing passage portion 68 side inside the clamper housing portion 64 corresponding to the tip portion of the leaf spring 114. The surface of the engaging portion 122 opposite to the webbing passage portion 68 is a restricting surface 124, and the tip of the leaf spring 114 abuts.

  On the other hand, the surface of the engaging portion 122 opposite to the bottom surface of the clamper housing portion 64 is a return slope 126 as a sliding surface. The leaf spring 114 can be placed on the return slope 126 by being elastically deformed against the elastic force from the state where the tip of the leaf spring 114 is in contact with the regulating surface 124. Further, the return slope 126 is inclined so as to gradually move away from the bottom surface of the clamper accommodating portion 64 in the direction opposite to the clamping direction. Therefore, when the clamper 112 slides in the clamping direction with the tip of the leaf spring 114 placed on the return slope 126, the leaf spring 114 is gradually elastically deformed so that the tip is separated from the bottom surface of the clamper housing portion 64.

  That is, in the first embodiment, the leaf spring 82 as the urging means is provided on the bottom surface of the clamper accommodating portion 64, that is, the tongue main body 40, and the engaging portion 92 as the restricting means is the clamper as the clamp member. 72. On the other hand, in the present embodiment, the plate spring 114 as the biasing means is provided in the clamper 112 as the clamp member, and the engaging portion 122 as the restricting portion is the bottom surface of the clamper accommodating portion 64, that is, the tongue main body. 40 is provided.

  As described above, the setting positions of the urging means and the restricting portion are opposite to those in the first embodiment, but the configuration of the present embodiment is the same as that of the first embodiment. There is an effect, and the same effect as in the first embodiment can be obtained.

  Next, a third embodiment will be described.

<Third Embodiment>
FIG. 8 is an exploded perspective view schematically showing a configuration of a seat belt device tongue 140 according to the present embodiment (hereinafter simply referred to as “tang 140”), and FIGS. 9 and 10 show the tongue 140. The expanded sectional view which expanded the principal part of this is shown.

  As shown in these drawings, the tongue 140 is not formed with the webbing passage portion 68, and the shoulder webbing 34 enters the inside of the clamper housing portion 64 from the webbing passage portion 66, and from the opening end of the clamper housing portion 64. The wrap webbing 32 comes out.

  The clamper accommodating portion 64 of the tongue 140 is provided with a clamper 142 as a clamp member in place of the clamper 72. The clamper 142 is formed in a bar shape along the width direction of the portion of the webbing 16 that passes through the inside of the clamper accommodating portion 64 in the webbing 16. A shaft portion 146 is formed coaxially from both ends of the clamper 142 in the axial direction, and is rotatably supported by a bearing hole 148 formed in the inner wall of the clamper housing portion 64.

  A webbing 16 entering from the opening end of the clamper accommodating portion 64 is hung around the clamper 142, and when the webbing 16 moves to the webbing passage portion 66 side, the clamper is caused by friction between the webbing 16 and the outer peripheral portion of the clamper 142. In the clamping direction (the clockwise direction in FIGS. 9 and 10 and the counterclockwise direction in FIG. 11), the outer periphery of the clamper 142 has a different distance from the central axis of the shaft portion 146 depending on the part. The gap between the clamper housing 64 and the bottom surface of the clamper housing 64 is larger than the thickness dimension of the webbing 16.

For this reason, the webbing 16 that is wound around the clamper 142 and enters the inside of the clamper accommodating portion 64 easily passes between the clamper 142 and the bottom surface of the clamper accommodating portion 64, and toward the opening end side of the clamper accommodating portion 64. I can move.

  Here, a clamp portion 144 is formed in the clamper 142. The clamp portion 144 has a long distance from the central axis of the shaft portion 146. When the clamper 142 is rotated to the position where the clamp portion 144 clamps the webbing 16 with the bottom surface of the clamper accommodating portion 64, the distance from the clamp portion 144 is reduced. Becomes less than the thickness dimension of the webbing 16, and the clamp part 144 of the clamper 142 and the bottom surface of the clamper accommodating part 64 clamp the webbing 16 and restrict the movement of the webbing 16 toward the opening end side of the clamper accommodating part 64.

Further, a leaf spring 152 as an urging means is mounted on the inner side of the clamper accommodating portion 64 in the tongue 140. Corresponding to the leaf spring 152, an engaging cam 154 as a restricting means is integrally provided on the shaft portion 146 side of the clamper 142. As shown in FIG. 11, the recess 156 as the distance is shorter regulation surface from the center axis of the shaft portion 146 than other portions of the outer peripheral portion of the engaging cam 154 is in part the outer circumference of the engaging cam 154 The tip of the leaf spring 152 enters the inside of the recess 156.

  Therefore, in order for the clamper 142 to rotate in the clamping direction, the leaf spring 152 must be elastically deformed until the tip of the leaf spring 152 comes out of the recess 156. Further, when the leaf spring 152 is pulled out from the recess 156, the tip of the leaf spring 152 is pressed against the outer peripheral portion of the engagement cam 154. However, for the subsequent rotation of the clamper 142 in the clamping direction, the leaf spring 152 is not recessed. No elastic deformation is required as when exiting from 156. For this reason, the clamper 142 can rotate in the clamping direction relatively easily after the front end of the leaf spring 152 has come out of the recess 156.

  As described above, the present embodiment also exhibits the same operation as that of the first embodiment, and can obtain the same effects as those of the first embodiment.

DESCRIPTION OF SYMBOLS 10 Seat belt device tongue 12 Seat belt device 16 Webbing 26 Buckle 40 Tongue body 44 Insertion part 72 Clamper (clamp member)
82 Leaf spring (biasing means)
92 Engagement part (regulating means)
94 Restricting surface 96 Return slope (sliding surface)
110 Seatbelt tongue 112 Clamper (clamp member)
114 Leaf spring (biasing means)
122 Engagement part (regulation means)
124 Regulating surface 126 Return slope (sliding surface)
140 Seatbelt tongue 142 Clamper (clamp member)
154 Engagement cam (regulation means)
156 Concavity (regulatory surface)

Claims (5)

A tongue body provided on the webbing so as to be movable in the longitudinal direction of the webbing through the webbing while having an insertion part that can be inserted into a buckle,
A clamp member that is provided on the tongue main body and is wound around the webbing and pulled by the webbing to move in a predetermined direction relative to the tongue main body, and clamps the webbing together with the tongue main body;
A biasing means provided on one of the clamp member and the tongue main body, biasing the clamp in a direction opposite to the predetermined direction by applying a biasing force to the other of the other;
The clamp member is provided on one of the other, and is engaged with the biasing means in a state before the clamp member moves in the predetermined direction, and the clamp member is indirectly in the predetermined direction via the biasing means. The clamping member is elastically deformed by applying a tensile force of a certain magnitude or more from the webbing to the biasing means via the clamp member. A restricting means for releasing the biasing force applied to any one of the other by the biasing means in a state in which the movement restriction is cancelled.
A tongue for a seat belt device comprising: The regulating means is
The clamp member faces the biasing means in a state before the clamp member moves and abuts against the biasing means, whereby the clamp member directly or indirectly regulates the movement in the predetermined direction, and the constant size. A regulating surface on which the biasing means that has received a load of more than that slides while elastically deforming;
The urging means is continuously formed on the regulating surface on the sliding direction side that slid on the regulating surface while elastically deforming, and the urging means that has slid on the regulating surface has come up A sliding surface on which the biasing means slides when the clamp member moves in the predetermined direction in a state;
Seat belt device for a tongue of claim 1, further comprising a regulating portion configured to include a. The sliding surface is configured so that the elastic deformation against the biasing force of said biasing means the urging means by sliding on the sliding surface so that the urging means is separated from the regulation surface The tongue for a seat belt device according to claim 2. The urging means has a base end side that is locked to one of the clamp member and the tongue main body, and the distal end side has a width direction with respect to the base end side by a load received on the distal end side from the restricting means. The tongue for a seatbelt device according to any one of claims 1 to 3, wherein the tongue is a leaf spring that is elastically deformed so as to be bent about an axial direction. A webbing whose front end is directly or indirectly locked to the seat or the vehicle body of the vehicle on the side of the seating position of the occupant in the vehicle seat;
A buckle provided on the opposite side to the locking position on the tip side of the webbing via the seating position;
The tongue for a seat belt device according to any one of claims 1 to 4,
A seat belt device comprising: