WO2023167246A1

WO2023167246A1 - Seat belt adjuster

Info

Publication number: WO2023167246A1
Application number: PCT/JP2023/007636
Authority: WO
Inventors: フィフンハ
Original assignee: 三桜工業株式会社
Priority date: 2022-03-02
Filing date: 2023-03-01
Publication date: 2023-09-07

Abstract

This seat belt adjuster comprises a guide rail in which are formed a plurality of locking recesses aligned in a sliding direction, a slider that is slidably attached to the guide rail in the sliding direction and has a through-hole, a lock pin that is passed through the through-hole and inserted into and removed from the locking recesses, a release pin extending from the lock pin, a holder having a lock-pin-accommodating part, a first urging member that urges the lock pin, an operation member that guides the release pin in an insertion/removal direction by sliding, and a second urging member that urges the lock pin in a direction intersecting the insertion/removal direction in a locked state in which the lock pin is inserted into a locking recess, the lock-pin-accommodating part having a contact part that, in the locked state, comes into contact with the lock pin being urged by the second urging member.

Description

seat belt adjuster

One aspect of the present invention relates to a seatbelt adjuster for adjusting the height of the seatbelt.

Conventionally, vehicles such as automobiles are equipped with a seatbelt device to protect passengers seated in the seat. As such a seat belt device, there is a three-point seat belt device. The seat belt of the three-point seat belt system consists of a shoulder belt that is supported by anchors attached to the vehicle body and restrains the shoulders, chest and waist of the occupant, and a wrap that is formed continuously with the shoulder belt and restrains the waist of the occupant. a belt;

Patent Document 1 describes a seat belt shoulder height adjuster that adjusts the vertical position of a sash guide through which seat belt webbing is inserted. The webbing described in Patent Document 1 is synonymous with the seatbelt described in the specification of the present application. In the seat belt shoulder height adjuster disclosed in Patent Document 1, a slider to which a sash guide is attached is attached to a guide rail fixed to the vehicle body so as to be slidable in the vertical direction of the vehicle. A lock pin provided on the slider is inserted into the engagement hole of the guide rail by the biasing force of the compression coil spring. As a result, the lock pin and the engagement hole are engaged with each other, and the slider is positioned and fixed on the guide rail.

Patent No. 3966439

In recent years, there has been a strong demand for quietness of vehicles, and there has been a problem of noise caused by rattling of the lock pin due to vibrations when the vehicle is running. Therefore, in the shoulder height adjuster for a seatbelt disclosed in Patent Document 1, the engaging holes other than those at the lowest position sandwich the lock pin from above and below. As a result, when the lock pin engages with an engagement hole other than the bottommost one, the rattling of the lock pin is prevented from generating an abnormal noise. However, the lowermost engagement hole does not sandwich the lock pin from above and below, and has a gap between it and the lock pin. Therefore, when the lock pin engages with the lowermost engagement hole, it is necessary to add another complicated structure to suppress the generation of noise due to rattling of the lock pin.

Therefore, it is an object of one aspect of the present invention to provide a seat belt adjuster that can suppress the generation of abnormal noise due to rattling of the lock pin with a simple configuration.

A seat belt adjuster according to one aspect of the present invention includes a guide rail formed with a plurality of engaging recesses arranged in a sliding direction, and a slider attached to the guide rail so as to be slidable in the sliding direction and having a through hole. a lock pin inserted into and removed from the locking recess through the through-hole; a release pin extending from the lock pin; a holder having a lock pin accommodating portion that is movably accommodated in an insertion/removal direction; a first biasing member that biases the lock pin in a direction in which the lock pin is inserted into the locking recess; An operation member that guides the release pin in the insertion/removal direction by sliding in an intersecting operation direction, and a second member that urges the lock pin in a direction that intersects the insertion/removal direction in the locked state in which the lock pin is inserted into the locking recess. and two urging members, and the lock pin accommodating portion has a contact portion that contacts the lock pin urged by the second urging member in the locked state.

In this seat belt adjuster, the locking pin is inserted into the locking recess by the biasing force of the first biasing member, thereby restricting the sliding of the slider with respect to the guide rail in the sliding direction. In the locked state, the second biasing member biases the lock pin in a direction intersecting the insertion/removal direction, and the lock pin contacts the contact portion of the lock pin accommodating portion. That is, in the locked state, the lock pin is in contact with the lock pin accommodating portion. Therefore, even if the vehicle is subject to large vibrations, it is possible to suppress rattling of the lock pin. As a result, it is possible to suppress the generation of abnormal noise due to rattling of the lock pin.

The contact portion may contact a partial area of the lock pin in the circumferential direction in the locked state. In this seat belt adjuster, the friction between the lock pin and the lock pin accommodating portion when the lock pin is moved in the insertion/removal direction by sliding the operation member is reduced compared to the case where the contact portion contacts the entire circumference of the lock pin. can do.

The contact portion may extend in the insertion/removal direction. In this seat belt adjuster, the contact area between the lock pin and the contact portion can be increased. As a result, rattling of the lock pin can be further suppressed.

The lock pin extends cylindrically in the insertion/removal direction, and the contact portion may be located at a position equal to or less than the radius of the lock pin from a reference line that passes through the center of the through hole and extends in the insertion/removal direction. With this seat belt adjuster, the design of the contact portion can be facilitated.

The lock pin extends in a columnar shape in the insertion/removal direction, and the cross section of the contact portion perpendicular to the insertion/removal direction may have the same radius of curvature as the outer peripheral surface of the lock pin. In this seat belt adjuster, the contact area between the lock pin and the contact portion can be increased. As a result, rattling of the lock pin can be further suppressed.

The second biasing member contacts the operating member and biases the operating member in the locking direction, which is one side in the operating direction. The pin may be contacted to urge the release pin and the lock pin in the lock direction, and the lock pin may contact the contact portion at a first surface portion on the lock direction side of the lock pin in the locked state. In this seat belt adjuster, in the locked state, the second biasing member biases the lock pin in the locking direction via the operating member and the release pin, and the first surface portion of the lock pin on the locking direction side contacts the contact portion. Since they are in contact with each other, it is possible to appropriately maintain the contact state between the lock pin and the contact portion in the locked state.

The operating member has a guide portion for guiding the release pin, and the guide portion includes a bottom portion, a release inclined portion extending from the bottom portion in a locking direction and in a direction away from the guide rail, and a release inclined portion extending from the bottom portion in a direction opposite to the locking direction and in a direction away from the guide rail. and a slide restricting portion extending away from the . In this seat belt adjuster, the release inclined portion and the sliding restricting portion extend toward the guide rail toward the bottom portion. Therefore, in the locked state, the release pin comes into contact with the bottom portion due to the biasing force of the first biasing member. Since the operation member is urged in the locking direction by the urging force of the second urging member, the release pin can be urged in the locking direction by the slide restricting portion in the locked state. Further, by sliding the operation member in the release direction, the release pin is moved away from the guide rail by the guidance of the release inclined portion. As a result, the lock pin can be removed from the locking recess.

The lock pin accommodating portion may be spaced apart from the second surface portion of the lock pin on the side opposite to the locking direction in the locked state. In this seat belt adjuster, the lock pin is allowed to move in the unlocking direction when the operation member is slid in the unlocking direction, which is the opposite direction to the locking direction, to remove the lock pin from the locking recess. As a result, the frictional resistance between the lock pin and the lock pin accommodating portion can be reduced when the operation member is slid in the release direction, so that the operation member can be smoothly slid in the release direction. can.

The lock pin extends in a columnar shape in the insertion/removal direction, the lock pin accommodating portion has a separation surface facing the second surface portion, and the separation surface is a reference line extending in the insertion/removal direction through the center of the through hole. may be located at a position spaced apart from the radius of the lock pin. With this seat belt adjuster, the separation surface can be easily designed.

According to one aspect of the present invention, it is possible to suppress the generation of noise due to rattling of the lock pin with a simple configuration.

It is a figure which shows the inside of the vehicle which mounts the seatbelt adjuster of this embodiment. It is a front view of the seat belt adjuster of this embodiment. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2; It is an exploded perspective view of a seat belt adjuster of this embodiment. 4 is a cross-sectional view enlarging a part of FIG. 3; FIG. 6 is a cross-sectional view taken along line VI-VI shown in FIG. 5; FIG. It is a side view which shows some seatbelt adjusters of this embodiment. It is a sectional view showing a part of seat belt adjuster of a modification. It is a perspective view which shows the lock pin of a modification. It is a sectional view showing a part of seat belt adjuster of a modification.

A seat belt adjuster according to an embodiment will be described below with reference to the drawings. In each figure, the same or corresponding elements are denoted by the same reference numerals, and overlapping descriptions are omitted. In the drawings, "UP" indicates the upper side in the vertical direction of the vehicle, and "IN" indicates the inner side in the vehicle width direction.

As shown in FIG. 1, the seatbelt adjuster 1 according to this embodiment is a device that is mounted on a vehicle 100 and adjusts the position of an anchor 102 that supports a seatbelt 101 . The seat belt 101 is a shoulder belt that restrains the shoulders, chest and waist of the occupant, and the anchor 102 is a shoulder anchor that supports the shoulder belt.

As shown in FIGS. 1 to 7, the seat belt adjuster 1 includes a guide rail 2, a slider 3, a lock pin 4, a release pin 5, a holder 6, a first biasing member 7, and an operating member 8. and a second biasing member 9.

The guide rail 2 is fixed to the vehicle body. The position of the vehicle body to which the guide rail 2 is fixed is not particularly limited. In this embodiment, the guide rail 2 is fixed to the vehicle width direction inner surface of a pillar 103 (center pillar) extending in the vehicle vertical direction. The guide rail 2 is formed in a substantially plate shape extending in the slide direction D1. The sliding direction D1 is, for example, the direction along the pillar 103 to which the guide rail 2 is fixed. The sliding direction D1 may be a straight direction or a curved direction. For example, when the pillar 103 extends in the vertical direction of the vehicle while being curved, the sliding direction D1 is the curved direction corresponding to the curved shape of the pillar 103 . In the present embodiment, it is assumed that the pillar 103 extends in the vertical direction of the vehicle while being curved, and the sliding direction D1 is the curved direction corresponding to the curved shape of the pillar 103 . Of the front and back surfaces of the guide rail 2 , the surface on the pillar 103 side is called an outer surface 21 , and the surface opposite to the pillar 103 is called an inner surface 22 .

The guide rail 2 has an upper fixing portion 23, a lower fixing portion 24, a base portion 25, and a pair of

rail portions

26,26.

The upper fixing part 23 and the lower fixing part 24 are fixed to the pillar 103 . The upper fixing portion 23 and the lower fixing portion 24 are located at both ends of the guide rail 2 in the sliding direction D1. The upper fixing portion 23 and the lower fixing portion 24 are arranged such that the upper fixing portion 23 is arranged on the upper side in the vertical direction of the vehicle and the lower fixing portion 24 is arranged on the lower side in the vertical direction of the vehicle. It is fixed to the pillar 103 at the part 24 . The fixing of the upper fixing portion 23 and the lower fixing portion 24 to the pillar 103 can be performed by bolting, for example.

The base portion 25 extends in the sliding direction D1 between the upper fixing portion 23 and the lower fixing portion 24 . A plurality of engaging recesses 27 arranged in the sliding direction D1 are formed in the central portion of the base portion 25 in the width direction W1 of the guide rail 2 . The locking recess 27 is a recess into which the lock pin 4 is inserted. The width direction W1 of the guide rail 2 is a direction orthogonal to the slide direction D1, and is a direction substantially in the longitudinal direction of the vehicle when the guide rail 2 is fixed to the pillar 103 . A portion of the engaging recess 27 on the upper fixing portion 23 side is inclined from the outer surface 21 side toward the inner surface 22 side. A portion of the engaging recess 27 on the side of the lower fixing portion 24 is formed in an arc shape. The locking recess 27 may have any shape and structure as long as it is recessed so that the lock pin 4 can be inserted therein. For example, the locking recess 27 may be a hole penetrating the guide rail 2 or a recess not penetrating the guide rail 2 . Moreover, the number of locking recesses 27 is not particularly limited, and can be four, for example.

The pair of

rail portions

26, 26 are positioned on both sides of the base portion 25 in the width direction W1 of the guide rail 2, and extend together with the base portion 25 in the sliding direction D1. That is, the pair of

rail portions

26 , 26 extend in the same direction as the arrangement direction of the plurality of locking recesses 27 . The pair of

rail portions

26, 26 are formed in a substantially C shape in which both end portions in the width direction W1 of the guide rail 2 are folded toward the inner surface 22 side, and open in directions facing each other.

The slider 3 supports the seat belt 101. The slider 3 is attached to the guide rail 2 so as to be slidable in the slide direction D1. The slider 3 is arranged on the inner surface 22 side of the guide rail 2 and is slidably fitted to the pair of

rail portions

26 , 26 . That is, both ends of the slider 3 in the width direction W2 are slidably fitted to the pair of

rail portions

26, 26. As shown in FIG. The width direction W2 of the slider 3 is a direction orthogonal to the sliding direction D1, and is a direction substantially in the vehicle front-rear direction when the guide rail 2 is fixed to the pillar 103 . That is, the width direction W2 of the slider 3 is a direction corresponding to the width direction W1 of the guide rail 2 . Therefore, the slider 3 is guided by the pair of

rail portions

26 , 26 so as to be slidable with respect to the guide rail 2 in the slide direction D1 , which is the direction in which the plurality of engaging recesses 27 are arranged.

A seat belt support portion 31 that supports the seat belt 101 and a through hole 32 into which the lock pin 4 is inserted are formed in the central portion of the slider 3 in the width direction W2. The seatbelt support portion 31 supports an anchor 102 that supports the seatbelt 101 . The seat belt support portion 31 is formed in a nut shape, for example, and supports the anchor 102 by screwing a bolt that rotatably holds the anchor 102 . The through hole 32 is formed on a line along which the plurality of locking recesses 27 are arranged. When the slider 3 slides on the guide rail 2 in the sliding direction D1, the through-hole 32 overlaps with one of the locking recesses 27 . The hole diameter (diameter) of the through hole 32 is slightly larger than the outer diameter (diameter) of the lock pin 4, for example.

The lock pin 4 is inserted (inserted and removed) into and out of the locking recess 27 through the through hole 32 in order to adjust the position of the slider 3 with respect to the guide rail 2 in the sliding direction D1. Although the shape of the lock pin 4 is not particularly limited, in the present embodiment, the lock pin 4 is formed in a columnar shape extending in the insertion/removal direction D2 of the lock pin 4 with respect to the locking recess 27 . The insertion/removal direction D2 is the direction in which the lock pin 4 is inserted/removed into/from the locking recess 27, and is the direction in which the lock pin 4 is separated from/contacts the guide rail 2, for example. Here, the direction in which the lock pin 4 is inserted into the locking recess 27 in the insertion/removal direction D2 is referred to as an insertion direction D2a, and the direction opposite to the insertion direction D2a in which the lock pin 4 is removed from the locking recess 27 is referred to as an insertion direction D2a. This is referred to as the withdrawal direction D2b. The lock pin 4 is inserted through the through hole 32 into one of the locking recesses 27 to restrict movement of the slider 3 with respect to the guide rail 2 in the sliding direction D1. A state in which the lock pin 4 is inserted into the locking recess 27 is called a locked state. In the locked state, movement of the slider 3 with respect to the guide rail 2 in the sliding direction D1 is restricted. Further, the lock pin 4 allows the slider 3 to move in the sliding direction D1 with respect to the guide rail 2 by being removed from the locking recess 27 into which it is inserted.

The release pin 5 extends from the lock pin 4 in order to insert/remove the lock pin 4 into/from the locking recess 27 . The release pin 5 extends from one end 41 of the lock pin 4 in a direction orthogonal to the insertion/removal direction D2. The shape of the release pin 5 is not particularly limited, but in the present embodiment, the release pin 5 has a curved side surface on the insertion direction D2a side and a flat side surface on the removal direction D2b side. It is formed in a deformed columnar shape. The release pin 5 may be integrated with the lock pin 4 or may be separate from the lock pin 4 . If the release pin 5 is integral with the lock pin 4 , the release pin 5 becomes part of the lock pin 4 . In this embodiment, a pair of release pins 5, 5 are formed integrally with the lock pin 4, and the lock pin 4 and the pair of release pins 5, 5 form a T shape or a cross shape. release pins 5, 5 extend from the lock pin 4 in opposite directions.

The holder 6 is fixed to the slider 3 and accommodates part of the lock pin 4 . A holder 6 is arranged on the opposite side of the guide rail 2 to the slider 3 . Fixing of the holder 6 to the slider 3 can be performed by, for example, hooking, fitting, caulking, or the like.

A lock pin accommodating portion 61 is formed in the central portion of the holder 6 in the width direction W3 to accommodate a portion of the lock pin 4 on the side opposite to the guide rail 2 so as to be movable in the insertion/removal direction D2. A portion of the lock pin 4 on the side opposite to the guide rail 2 is also a portion of the lock pin 4 on the removal direction D2b side. The width direction W3 of the holder 6, like the width direction W1 of the guide rail 2, is a direction orthogonal to the slide direction D1, and is substantially the vehicle front-rear direction when the guide rail 2 is fixed to the pillar 103. be. That is, the width direction W3 of the holder 6 is a direction corresponding to the width direction W1 of the guide rail 2 . The lock pin accommodating portion 61 is formed in a substantially cylindrical shape. The lock pin housing portion 61 is formed with a housing space 62 , a top portion 63 , a lock pin opening 64 , and a pair of

release pin openings

65 , 65 . The accommodation space 62 is a space formed on the inner peripheral side of the lock pin accommodation portion 61, and accommodates a portion of the lock pin 4 on the removal direction D2b side so as to be movable in the insertion/extraction direction D2. The top portion 63 is located on the opposite side of the accommodation space 62 from the guide rail 2 and blocks the opposite side of the accommodation space 62 from the guide rail 2 . The lock pin opening 64 opens the accommodation space 62 toward the guide rail 2 and allows the lock pin 4 to protrude from the lock pin accommodation portion 61 toward the guide rail 2 . The pair of

release pin openings

65, 65 opens the accommodation space 62 to both sides in the width direction W3 of the holder 6, and allows the pair of release pins 5, 5 to extend from the lock pin accommodation portion 61 to both sides in the width direction W3 of the holder 6. to protrude. For this reason, the lock pin 4 is oriented in the insertion/removal direction D2 by being housed in the lock pin housing portion 61 and protrudes from the lock pin housing portion 61 toward the guide rail 2 side. Also, the pair of release pins 5, 5 protrude from the lock pin accommodating portion 61 to both sides of the holder 6 in the width direction W3.

A pair of sliding

grooves

66, 66 are formed at both ends of the holder 6 in the width direction W3. The pair of sliding

grooves

66, 66 hold the operating member 8 slidably in the operating direction D3. The operation direction D3 is a direction intersecting with the insertion/removal direction D2. In this embodiment, the operation direction D3 is a direction perpendicular to the insertion/removal direction D2 and the same direction as the slide direction D1. A pair of sliding

grooves

66, 66 extend in the sliding direction D1. The pair of sliding

grooves

66, 66 are formed in a substantially C shape in which both ends in the width direction W3 of the holder 6 are folded back to the side opposite to the guide rail 2, and open in directions facing each other. are doing.

The first biasing member 7 biases the lock pin 4 in the direction in which the lock pin 4 is inserted into the locking recess 27, that is, in the insertion direction D2a. To urge the lock pin 4 in the insertion direction D2a means to push the lock pin 4 in the insertion direction D2a. As the first biasing member 7, for example, an elastic expansion/contraction member such as a compression coil spring can be used. In this case, the first biasing member 7 is arranged in the accommodation space 62 between the lock pin 4 and the top portion 63 . Then, the first biasing member 7 biases the lock pin 4 toward the top portion 63 in the insertion direction D2a by the elastic restoring force of the first biasing member 7 . When the lock pin 4 is inserted into the locking recess 27 , the state in which the lock pin 4 is inserted into the locking recess 27 is maintained by the biasing force of the first biasing member 7 .

The operation member 8 slides in the operation direction D3 with respect to the holder 6 to guide the release pin 5 in the insertion/removal direction D2. The operating member 8 is held in a pair of sliding

grooves

66, 66 of the holder 6 so as to be slidable in the operating direction D3. That is, the operation member 8 is slidable in the operation direction D3 by being guided by the pair of sliding

grooves

66,66. Here, one direction in the operation direction D3 is called a lock direction D3a, and the opposite direction of the lock direction D3a in the operation direction D3 is called a release direction D3b.

The operating member 8 is formed in a U shape so as to avoid the lock pin accommodating portion 61. The operating member 8 includes a base portion 81 extending in the width direction W3 of the holder 6, a pair of

side wall portions

82, 82 extending in the sliding direction D1 from both ends of the base portion 81, and a pair of rail portions 83 extending from the pair of

side wall portions

82, 82. , 83 and . The pair of

rail portions

83, 83 extend in the slide direction D1 and are slidably inserted into the pair of

slide grooves

66, 66 of the holder 6. As shown in FIG. The operation member 8 is slidable in the operation direction D3 by sliding the pair of

rail portions

83, 83 guided by the pair of sliding

grooves

66, 66. As shown in FIG.

The pair of

side wall portions

82, 82 guide the pair of release pins 5, 5 in the insertion/removal direction D2. A pair of

guide portions

84 , 84 for guiding the pair of release pins 5 , 5 are formed on the pair of

side wall portions

82 , 82 . The pair of

guide portions

84, 84 guide the pair of release pins 5, 5 in the insertion/removal direction D2 by the operation member 8 sliding in the operation direction D3.

The second biasing member 9 biases the lock pin 4 in a direction intersecting the insertion/removal direction D2 in the locked state in which the lock pin 4 is inserted into the locking recess 27 . In this embodiment, the second biasing member 9 indirectly biases the lock pin 4 in the locking direction D3a in the locked state. Specifically, the second biasing member 9 contacts the operating member 8 and biases the operating member 8 in the locking direction D3a. To urge the operating member 8 in the locking direction D3a means to push the operating member 8 in the locking direction D3a. As the second biasing member 9, for example, an elastic expansion/contraction member such as a compression coil spring can be used. In this case, the second biasing member 9 is arranged between the lock pin accommodating portion 61 and the base portion 81 of the operating member 8 . Then, the second biasing member 9 biases the base portion 81 of the operating member 8 against the lock pin accommodating portion 61 in the locking direction D3a by the elastic restoring force of the second biasing member 9 . That is, the second biasing member 9 biases the base portion 81 of the operating member 8 in a direction away from the lock pin accommodating portion 61 . In the locked state, the operating member 8 biased by the second biasing member 9 contacts the release pin 5 and biases the release pin 5 and the lock pin 4 in the locking direction D3a. That is, the second biasing member 9 biases the lock pin 4 in the locking direction D3a via the operating member 8 and the release pin 5 .

Next, the operation member 8 will be explained in more detail. The pair of

guide portions

84 , 84 of the operating member 8 each have a bottom portion 85 , a release inclined portion 86 , a slide restricting portion 87 and a release blocking portion 88 .

The bottom part 85 is positioned closest to the guide rail 2 in the guide part 84 . For this reason, the release pin 5 is pressed against the guide portion 84 by the biasing force of the first biasing member 7 , so that the release pin 5 is pushed against the bottom portion 85 in the locked state in which the lock pin 4 is inserted into the locking recess 27 . be in contact.

The release inclined portion 86 extends from the bottom portion 85 in the lock direction D3a and in the direction away from the guide rail 2 . In other words, the release slope portion 86 slopes away from the guide rail 2 as it moves away from the bottom portion 85 . Therefore, when the operation member 8 is slid with respect to the holder 6 in the release direction D3b, the release inclined portion 86 moves in the direction in which the lock pin 4 is removed from the locking recess 27, that is, in the removal direction D2b. Guide 5. As a result, the lock pin 4 is removed from the locking recess 27, and the slider 3 can slide with respect to the guide rail 2 in the sliding direction D1.

The sliding restricting portion 87 extends from the bottom portion 85 in the release direction D3b and in the direction away from the guide rail 2 . In the locked state, the sliding restricting portion 87 is arranged on the releasing direction D3b side of the releasing pin 5 and contacts the releasing pin 5 from the releasing direction D3b side. Therefore, the sliding restricting portion 87 restricts the sliding of the operating member 8 in the release direction D3b. Further, the operating member 8 is biased in the locking direction D3a by the second biasing member 9, so that in the locked state, the operating member 8 comes into contact with the release pin 5 and biases the release pin 5 and the lock pin 4 in the locking direction D3a. do.

The release blocking portion 88 is formed at a position facing the bottom portion 85 in the insertion/removal direction D2. Therefore, the unlocking prevention portion 88 prevents the lock pin 4 from being removed from the locking recess portion 27 in the locked state.

Next, the lock pin accommodating portion 61 of the holder 6 will be described in more detail. The lock pin housing portion 61 of the holder 6 has a contact portion 67 . The contact portion 67 is a portion for suppressing rattling of the lock pin 4 in the locked state in which the lock pin 4 is inserted into the locking recess 27 . The contact portion 67 contacts the lock pin 4 biased by the second biasing member 9 at least in the locked state. The region of the lock pin 4 with which the contact portion 67 contacts in the locked state is not particularly limited. is the first surface portion 43 and the like. In this embodiment, in the locked state, the contact portion 67 contacts the first surface portion 43, which is a surface of the lock pin 4 on the lock direction D3a side, which is a partial area of the lock pin 4 in the circumferential direction D4.

The contact portion 67 is configured by the second biasing member 9 biasing the lock pin 4 in the locked state. By pressing the lock pin 4 in the lock direction D3a, the lock pin 4 is contacted. The contact portion 67 may be located at a position equal to or less than the radius R of the lock pin 4 from the reference line L extending in the insertion/removal direction D2 through the center 32C of the through hole 32 of the slider 3, or may contact the lock pin 4. good. In this case, the contact portion 67 may be positioned at a radius R of the lock pin 4 from the reference line L.

The shape of the contact portion 67 is not particularly limited. For example, the contact portion 67 may extend in the insertion/removal direction D2 or in the circumferential direction D4 of the lock pin 4 . Further, a cross section of the contact portion 67 perpendicular to the insertion/removal direction D2 (the cross section of FIG. 6) may have the same radius of curvature as the outer peripheral surface 44 of the lock pin 4 . Also, the contact portion 67 may be formed of a single rib-like projection extending in the insertion/removal direction D2.

By the way, when the operating member 8 is slid in the release direction D3b in order to remove the lock pin 4 inserted in the locking recess 27 from the locking recess 27, the release pin 5 is moved by the release inclined portion 86 in the release direction D3b. pushed by Therefore, if the lock pin accommodating portion 61 is in contact with the second surface portion 45, which is the surface of the lock pin 4 on the release direction D3b side, in the locked state, the operation member 8 is caused to slide in the release direction D3b. At this time, the frictional force between the lock pin accommodating portion 61 and the second surface portion 45 becomes excessive, making it difficult to remove the lock pin 4 from the locking recess portion 27 . Moreover, the lock pin 4 or the second surface portion 45 is worn.

Therefore, from the viewpoint of facilitating removal of the lock pin 4 from the locking recess 27 and suppressing wear of the lock pin housing portion 61 or the second surface portion 45, the lock pin housing portion 61 is designed so that the second surface of the lock pin housing portion 61 in the locked state It may be spaced apart from the portion 45 . That is, the lock pin accommodating portion 61 may have a separation surface 68 facing the second surface portion, and the separation surface 68 may be separated from the lock pin 4 in the locked state.

The configuration for separating the separation surface 68 from the lock pin 4 in the locked state is not particularly limited. For example, the separation surface 68 is separated from the lock pin 4 by being positioned at a position separated from the reference line L extending in the insertion/removal direction D2 through the center 32C of the through hole 32 of the slider 3 by a radius R of the lock pin 4. It may be assumed that Further, even if the separation surface 68 is separated from the lock pin 4 when the release pin 5 is biased in the lock direction D3a by the operation member 8 biased by the second biasing member 9 in the locked state. good.

As described above, in the seat belt adjuster 1 according to the present embodiment, the locking pin 4 is inserted into the locking recess 27 by the biasing force of the first biasing member 7 , thereby allowing the slider 3 to slide with respect to the guide rail 2 . Sliding in direction D1 is restricted. Then, in the locked state, the second biasing member 9 biases the lock pin 4 in a direction intersecting the insertion/removal direction D2, and the lock pin 4 contacts the contact portion 67 of the lock pin accommodating portion 61 . That is, in the locked state, the lock pin 4 is in contact with the lock pin accommodating portion 61 . Therefore, it is possible to prevent the lock pin 4 from rattling even when the vehicle is subjected to a large vibration. As a result, it is possible to suppress the occurrence of abnormal noise due to rattling of the lock pin 4 .

In addition, in the seat belt adjuster 1, the contact portion 67 contacts a partial region of the lock pin 4 in the circumferential direction in the locked state. Friction between the lock pin 4 and the lock pin accommodating portion 61 can be reduced when the operation member 8 is slid to move the lock pin 4 in the insertion/removal direction D2.

Also, in the seat belt adjuster 1, the contact portion 67 extends in the insertion/removal direction D2, so the contact area between the lock pin 4 and the contact portion 67 can be increased. As a result, rattling of the lock pin 4 can be further suppressed.

Further, in this seat belt adjuster 1, the contact portion 67 is located at a position equal to or less than the radius R of the lock pin 4 from the reference line L extending in the insertion/removal direction D2 through the center 32C of the through hole 32 of the slider 3. The design of the portion 67 can be facilitated.

Further, in the seat belt adjuster 1, the cross section of the contact portion 67 perpendicular to the insertion/removal direction D2 has the same radius of curvature as the outer peripheral surface 44 of the lock pin 4, so that the contact area between the lock pin 4 and the contact portion 67 is increased. can do. As a result, rattling of the lock pin 4 can be further suppressed.

Further, in this seat belt adjuster, in the locked state, the second biasing member 9 biases the lock pin 4 in the locking direction D3a via the operation member 8 and the release pin 5, and the lock pin 4 is locked in the locking direction D3a. Since the first surface portion 43 contacts the contact portion 67, the contact state between the lock pin 4 and the contact portion 67 can be appropriately maintained in the locked state.

Further, in this seat belt adjuster 1 , in the guide portion 84 of the operating member 8 , the releasing inclined portion 86 and the sliding restricting portion 87 are inclined toward the guide rail 2 toward the bottom portion 85 . Therefore, in the locked state, the release pin 5 is in contact with the bottom portion 85 due to the biasing force of the first biasing member 7 . Since the operation member 8 is urged in the locking direction D3a by the urging force of the second urging member 9, the release pin 5 is urged in the locking direction D3a by the sliding restricting portion 87 in the locked state. can be done. Further, by sliding the operation member 8 in the release direction D3b, the release pin 5 is guided by the release inclined portion 86 to move in the removal direction D2b. Thereby, the lock pin 4 can be removed from the locking recess 27 .

In the seat belt adjuster 1, the lock pin housing portion 61 is separated from the second surface portion 45 of the lock pin 4 in the locked state. is allowed to move in the release direction D3b when the lock pin 4 is removed from the locking recess 27. As shown in FIG. This can reduce the frictional resistance between the lock pin 4 and the lock pin accommodating portion 61 when the operation member 8 slides in the release direction D3b. You can move smoothly.

Further, in the seat belt adjuster 1, the separation surface 68 is located at a position spaced apart from the reference line L extending in the insertion/removal direction D2 through the center 32C of the through hole 32 of the slider 3 by a radius R of the lock pin 4. , the spacing surface 68 can be easily designed.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments.

For example, in the above embodiment, the contact portion of the lock pin accommodating portion was described as contacting the lock pin in the locked state, but it may also contact the lock pin in states other than the locked state.

Further, in the above-described embodiment, the contact portion of the lock pin accommodating portion contacts the lock pin in the locked state, thereby suppressing the rattling of the lock pin. Like the adjuster 1A, it is also possible to suppress rattling of the lock pin by contacting the lock pin 4A with the through hole 32A of the slider 3A in the locked state. A seatbelt adjuster 1A of a modified example shown in FIG. 8 is basically similar to the seatbelt adjuster 1 of the above embodiment, but differs from the seatbelt adjuster 1 of the above embodiment in the shape of the lock pin 4A.

As shown in FIGS. 8 to 10, the lock pin 4A has a large diameter portion 46, a small diameter portion 47, and an inclined portion 48. The large-diameter portion 46 is a portion on the removal direction D2b side of the lock pin 4A. The large diameter portion 46 is formed in a columnar shape extending in the insertion/extraction direction D2. The large diameter portion 46 contacts the contact portion 67 in the locked state. The small diameter portion 47 is a portion on the insertion direction D2a side of the lock pin 4A. The small diameter portion 47 is formed in a columnar shape extending in the insertion/removal direction D2. The outer diameter of the small diameter portion 47 is smaller than the outer diameter of the large diameter portion 46 . The small-diameter portion 47 is inserted into the through hole 32A of the slider 3A and inserted into and removed from the locking recess 27 (see FIG. 3). The inclined portion 48 is a portion located between the large diameter portion 46 and the small diameter portion 47 in the insertion/removal direction D2. The inclined portion 48 is formed in a tapered shape that gradually decreases in diameter (becomes thinner) from the large diameter portion 46 toward the small diameter portion 47 . In other words, the inclined portion 48 is formed in a reverse tapered shape that gradually increases in diameter (thickens) from the small diameter portion 47 toward the large diameter portion 46 . Therefore, the outer peripheral surface of the inclined portion 48 is inclined with respect to the central axis A of the lock pin 4A in a direction in which the large diameter portion 46 side becomes larger (thicker) than the small diameter portion 47 side. ing.

The through hole 32A of the slider 3A has a main hole portion 33 and an end hole portion 34. The hole diameter of the main hole portion 33 is smaller than the outer diameter of the large diameter portion 46 and larger than the outer diameter of the small diameter portion 47 . The end hole portion 34 is the end portion of the through hole 32A opposite to the guide rail 2 and is located on the opposite side of the main hole portion 33 to the guide rail 2 . The diameter of the end hole portion 34 increases from the main hole portion 33 toward the side opposite to the guide rail 2 . The maximum hole diameter of the end hole portion 34 is obtained at the end of the end hole portion 34 opposite to the guide rail 2 and is larger than the outer diameter of the large diameter portion 46 .

The inclined portion 48 of the lock pin 4A is formed at a position where it contacts the end hole portion 34 of the through hole 32A when the release pin 5 contacts the bottom portion 85 of the guide portion 84 of the operating member 8 in the locked state. In the locked state, the inclined portion 48 and the end hole portion 34 are in annular contact. For example, the end hole portion 34 may be formed in a trumpet shape in which the inclined portion 48 and the end hole portion 34 are in annular line contact, or a truncated cone in which the inclined portion 48 and the end hole portion 34 are in annular surface contact. It may be formed in a shape. The expression that the end hole portion 34 is formed in a trumpet shape means that the end hole portion 34 is expanded in diameter from the main hole portion 33 toward the side opposite to the guide rail 2 in a convex curved shape.

As described above, in the seat belt adjuster 1A of the modified example, the lock pin 4A and the through hole 32A of the slider 3A are further brought into contact with each other, so that rattling of the lock pin can be further suppressed. As a reference example, the seat belt adjuster 1A of the modified example may not include the contact portion. In other words, the lock pin receiving portion and the lock pin may not come into contact with each other in the locked state.

In the above embodiment, the second biasing member biases the lock pin in the locking direction in the locked state. As long as the contact portion can be contacted, the lock pin may be urged in any direction crossing the insertion/removal direction.

As a reference example, in the locked state, when the lock pin contacts the contact portion of the lock pin housing portion even if the second biasing portion does not bias the lock pin in the direction intersecting the insertion/removal direction, the second The urging portion may not be provided, and the lock pin 4 may contact the contact portion 67 in the locked state without the urging force of the second urging member. For example, the lock pin 4 contacts the contact portion 67 in the locked state by being positioned at a position equal to or less than the radius R of the lock pin 4 from the reference line L extending in the insertion/removal direction D2 through the center 32C of the through hole 32 of the slider 3. It may be assumed that In this case, by increasing the biasing force of the first biasing member and strongly pressing the release pin against the rail portion of the operation member, the lock pin 4 is brought into contact with the contact portion 67 in the locked state more appropriately. be able to.

One aspect of the present invention can be used as a seat belt adjuster for adjusting the height of the seat belt.

DESCRIPTION OF SYMBOLS 1... Seatbelt adjuster, 1A... Seatbelt adjuster, 2... Guide rail, 3... Slider, 3A... Slider, 4... Lock pin, 4A... Lock pin, 5... Release pin, 6... Holder, 7... First biasing Member 8 Operation member 9 Second urging member 21 Outer surface 22 Inner surface 23 Upper fixed part 24 Lower fixed part 25 Base part 26 Rail part 27 Locking Recessed portion 31 Seatbelt support portion 32 Through hole 32A Through hole 32C Center 33 Main hole portion 34 End hole portion 41 End portion 43 First surface portion 44 Periphery Surface 45 Second surface portion 46 Large diameter portion 47 Small diameter portion 48 Inclined portion 61 Lock pin housing portion 62 Housing space 63 Ceiling portion 64 Lock pin opening 65 Release pin opening 66 Sliding groove 67 Contact portion 68 Spacing surface 81 Base portion 82 Side wall portion 83 Rail portion 84 Guide portion 85 Bottom portion 86 Release inclined portion , 87 Sliding control portion 88 Release blocking portion 100 Vehicle 101 Seatbelt 102 Anchor 103 Pillar A Central axis D1 Slide direction D2 Insertion/extraction direction D2a Insertion direction , D2b... removal direction, D3... operation direction, D3a... lock direction, D3b... release direction, D4... circumferential direction, L... reference line, R... radius, W1... width direction, W2... width direction, W3... width direction.

Claims

a guide rail formed with a plurality of locking recesses aligned in the sliding direction;
a slider that is slidably attached to the guide rail in the sliding direction and has a through hole;
a lock pin that passes through the through hole and is inserted into and removed from the locking recess;
a release pin extending from the lock pin;
a holder that is fixed to the slider and has a lock pin accommodating portion that accommodates a portion of the lock pin on the opposite side of the guide rail so as to be movable in the insertion/extraction direction of the lock pin with respect to the locking recess;
a first biasing member that biases the lock pin in a direction in which the lock pin is inserted into the locking recess;
an operation member that guides the release pin in the insertion/removal direction by sliding in the operation direction that intersects the insertion/removal direction with respect to the holder;
a second biasing member that biases the lock pin in a direction crossing the insertion/removal direction in a locked state in which the lock pin is inserted into the locking recess;
The lock pin accommodating portion has a contact portion with which the lock pin biased by the second biasing member contacts in the locked state,
seat belt adjuster.
The contact portion contacts a partial region of the lock pin in the circumferential direction in the locked state.
The seat belt adjuster according to claim 1.
The contact portion extends in the insertion/removal direction,
The seat belt adjuster according to claim 1 or 2.
The lock pin extends in a cylindrical shape in the insertion/removal direction,
The contact portion is positioned at a position equal to or less than the radius of the lock pin from a reference line extending through the center of the through hole and extending in the insertion/removal direction.
A seat belt adjuster according to any one of claims 1 to 3.
The lock pin extends in a cylindrical shape in the insertion/removal direction,
A cross section of the contact portion perpendicular to the insertion/removal direction has the same radius of curvature as the outer peripheral surface of the lock pin,
A seat belt adjuster according to any one of claims 1 to 4.
the second biasing member contacts the operating member and biases the operating member in a locking direction, which is one side in the operating direction;
the operating member biased by the second biasing member contacts the release pin in the locked state to bias the release pin and the lock pin in the locking direction;
In the locked state, the lock pin contacts the contact portion on a first surface portion on the lock direction side of the lock pin.
A seat belt adjuster according to any one of claims 1 to 5.
The operation member has a guide portion that guides the release pin,
The guide part is
a bottom;
a release slope extending from the bottom in the locking direction and in a direction away from the guide rail;
a sliding restricting portion extending from the bottom portion in a direction opposite to the locking direction and in a direction away from the guide rail;
The seat belt adjuster according to claim 6.
In the locked state, the lock pin accommodating portion is spaced apart from a second surface portion of the lock pin opposite to the lock direction.
The seat belt adjuster according to claim 7.
The lock pin extends in a cylindrical shape in the insertion/removal direction,
The lock pin accommodating portion has a separation surface facing the second surface portion,
The separation surface is located at a position spaced apart from a reference line extending in the insertion/removal direction through the center of the through hole by a radius of the lock pin.
The seat belt adjuster according to claim 8.