KR100680593B1 - Retractor for seat belt - Google Patents

Retractor for seat belt Download PDF

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Publication number
KR100680593B1
KR100680593B1 KR1020050102814A KR20050102814A KR100680593B1 KR 100680593 B1 KR100680593 B1 KR 100680593B1 KR 1020050102814 A KR1020050102814 A KR 1020050102814A KR 20050102814 A KR20050102814 A KR 20050102814A KR 100680593 B1 KR100680593 B1 KR 100680593B1
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KR
South Korea
Prior art keywords
spring
seat belt
retractor
housing
plate
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KR1020050102814A
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Korean (ko)
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정두고
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현대자동차주식회사
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Priority to KR1020050102814A priority Critical patent/KR100680593B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/129—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon characterised by friction-damping means
    • F16F15/1295—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon characterised by friction-damping means characterised by means for interconnecting driven plates and retainer, cover plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R2022/3402—Retractor casings; Mounting thereof

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

A retractor for a seat belt is provided to prevent a spring holder from directly contacting with an outer housing during the operation of a spiral spring. A retractor for a seat belt comprises a spiral spring(130) resiliently supporting a rotational shaft to which the seat belt is connected. The retractor includes a housing, and a spring holder(140). A screw thread is formed at a central portion of the housing. The spring holder includes a plate contacting with one end of the spiral spring. The spring holder has an engagement hole so that the rotational shaft can be fixed to the other side of a rotational pin vertically protruded from center portion of the plate and screw-coupled to the housing. A plurality of blades are radially formed on a same surface of the plate. Chrome is coated on a surface of the spring holder.

Description

시트벨트용 리트렉터{Retractor for seat belt}Retractor for seat belts {Retractor for seat belt}

도 1은 종래의 시트벨트용 리트렉터의 분해 사시도,1 is an exploded perspective view of a conventional seat belt retractor,

도 2는 종래의 시트벨트용 리트렉터의 단면도,2 is a cross-sectional view of a conventional seat belt retractor,

도 3은 본 발명에 따른 시트벨트용 리트렉터의 분해 사시도,3 is an exploded perspective view of a seat belt retractor according to the present invention;

도 4 및 도 5는 본 발명의 시트벨트용 리트렉터의 작동 예를 보여주는 도면.4 and 5 are views showing an operation example of the retractor for seat belts of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

110 : 내측 하우징 120 : 외측 하우징110: inner housing 120: outer housing

130 : 태엽스프링 140 : 스프링 홀더130: hand-held spring 140: spring holder

141 : 회동핀 142 : 플레이트141: rotating pin 142: plate

150 : 샤프트150: shaft

본 발명은 시트벨트용 리트렉터에 관한 것으로, 특히 권취력을 제공하는 스프링과 이 스프링이 수납되는 하우징 사이에 마찰에 의한 권취력 저하를 방지할 수 있는 시트벨트용 리트렉터에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat belt retractor, and more particularly, to a seat belt retractor capable of preventing a reduction in winding force due to friction between a spring providing a winding force and a housing in which the spring is housed.

일반적으로 차량의 시트벨트는 차량에 탑승한 승차자의 하복부와 흉부를 시트에 안정되게 고정하여 차량 충돌시 차체에 가해지는 충격력에 의해 발생되는 2차적 유동상태를 저감하기 위한 장치이다.In general, a seat belt of a vehicle is a device for stably fixing the lower abdomen and the chest of a passenger riding in a vehicle to reduce the secondary flow state generated by the impact force applied to the vehicle body in a vehicle crash.

도 1은 종래의 시트벨트용 리트렉터의 분해 사시도로서, 하우징(10) 내에는 태엽스프링(20)이 삽입된 후에 하우징(10)에 커버(30)가 나사 조립된다.1 is an exploded perspective view of a conventional seat belt retractor, the cover 30 is screwed to the housing 10 after the spring spring 20 is inserted into the housing 10.

태엽스프링(20)의 중앙부에는 원통형의 힌지핀(21)이 삽입되며, 이 힌지핀(21)에는 시트벨트와 연결되는 샤프트의 힌지축이 끼워 고정된다.A cylindrical hinge pin 21 is inserted into the central part of the spring 20, and the hinge pin of the shaft connected to the seat belt is fitted into the hinge pin 21.

도 2는 종래의 시트벨트용 리트렉터의 단면도로서, 시트벨트의 인출/인입에 따라 샤프트(40)가 회전하게 되며, 이때 샤프트(40)의 힌지축(41)은 힌지핀(21)에 고정되어 태엽스프링(20)의 탄성력이 작용한다.2 is a cross-sectional view of a conventional seat belt retractor, the shaft 40 is rotated in accordance with the withdrawal / retraction of the seat belt, the hinge shaft 41 of the shaft 40 is fixed to the hinge pin 21 So the spring force of the spring 20 acts.

즉, 시트벨트가 인출되는 과정에서 태엽스프링(20)이 같이 팽창되면서 시트벨트가 다시 인입될 수 있는 리턴력을 제공한다.That is, as the spring spring 20 is expanded together in the process of drawing out the seat belt, the seat belt provides a return force to be retracted.

따라서, 시트벨트에 외력이 작용하지 않는 경우에는 태엽스프링(20)의 탄성 복원력에 의해 샤프트(40)가 회전하면서 시트벨트를 감게 된다.Therefore, when no external force acts on the seat belt, the seat belt is wound while the shaft 40 rotates by the elastic restoring force of the spring spring 20.

그러나, 이와 같은 종래의 시트벨트용 리트렉터는 시트벨트가 다시 감길 경우에 리턴력이 저하되어 충분히 감기지 못하는 경우가 발생한다. 이러한 원인 중에 하나로는, 태엽스프링(20)이 작동 중에 태엽스프링의 측부 일단이 커버(30)와 마찰되면서 리턴력이 감소되는 경우가 있다(도 2의 A부분).However, such a conventional seat belt retractor, when the seat belt is rewound, the return force is lowered and may not be sufficiently wound. One of these causes is that the return force is reduced while the one end of the side of the spring spring is in friction with the cover 30 during operation of the spring spring 20 (part A of FIG. 2).

또한, 이러한 과정이 지속됨에 따라 태엽스프링과 커버 사이의 마찰에 의한 커버의 플라스틱 칩 등이 그리스와 엉겨 붙어서 태엽스프링의 리턴력 저하가 더욱 가중되는 문제점이 있다.In addition, as the process continues, there is a problem that the plastic chip of the cover due to the friction between the spring and the cover is entangled with grease, thereby further reducing the return force of the spring.

본 발명은 상기의 결점을 해소하기 위한 것으로, 시트벨트용 리트렉터에 있어 권취력을 제공하는 스프링과 이 스프링이 수납되는 하우징 사이에 마찰에 의한 권취력 저하를 방지할 수 있는 시트벨트용 리트렉터를 제공하고자 한다.SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawback, and a seat belt retractor capable of preventing a decrease in winding force due to friction between a spring providing a winding force in a seat belt retractor and a housing in which the spring is accommodated. To provide.

이러한 본 발명의 시트벨트용 리트렉터는, 시트벨트가 연결되는 샤프트의 회동축을 탄성 지지하는 태엽스프링을 포함하는 시트벨트용 리트렉터에 있어서, 중앙에 나사산이 형성된 하우징과; 상기 태엽스프링의 측부 일단과 접하는 플레이트가 구비되며, 이 플레이트 중앙에서 수직 돌출되어 상기 하우징에 나사 체결되는 회동 핀의 타측으로 상기 샤프트의 회동축이 고정되도록 체결공이 형성된 스프링 홀더로 구성되는 것을 특징으로 한다.Such a seat belt retractor of the present invention comprises: a seat belt retractor including a spring spring for elastically supporting a rotation shaft of a shaft to which the seat belt is connected, comprising: a housing having a screw thread formed at the center thereof; A plate is provided which is in contact with one end of the side spring of the main spring, and is composed of a spring holder formed with a fastening hole so that the pivot shaft of the shaft is fixed to the other side of the pivot pin which is vertically protruded from the center of the plate and screwed to the housing. do.

본 발명의 실시예를 첨부 도면을 참고하여 상세히 설명하면 다음과 같다.An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 3을 참고하면, 본 실시예에서는 하우징(110)(120), 태엽스프링(130), 스프링 홀더(140) 및 샤프트(150)로 구성된다.Referring to Figure 3, in the present embodiment is composed of a housing 110, 120, spring spring 130, spring holder 140 and the shaft 150.

하우징(110)(120)은 대략 원판 형상의 내측 하우징(110)과, 태엽스프링(130)이 수납될 수 있도록 함몰된 수납공간을 갖는 외측 하우징(120)으로 이루어지며, 내측 하우징(110)과 외측 하우징(120)은 나사 체결되어 조립된다.The housings 110 and 120 are formed of an inner housing 110 having a substantially disc shape, and an outer housing 120 having a storage space recessed to accommodate the spring spring 130, and the inner housing 110. The outer housing 120 is assembled by screwing.

외측 하우징(120)의 중앙에는 나사산이 형성된 힌지공(121)이 형성된다.In the center of the outer housing 120 is formed a hinge hole 121 is formed with a screw thread.

태엽스프링(130)은 주지의 나선형 스프링이다.The spring 130 is a well known spiral spring.

스프링 홀더(140)는 원통형의 회동핀(141)과, 이 회동핀(141)에 수직한 플레이트(142)로 구성될 수 있다.The spring holder 140 may be composed of a cylindrical pivot pin 141 and a plate 142 perpendicular to the pivot pin 141.

한편, 회동핀(141) 일단의 외주면에는 나사산(141a)이 형성되며, 이 나사산(141a)은 외측 하우징(120)의 힌지공(121)과 나사 체결된다.Meanwhile, a thread 141a is formed on an outer circumferential surface of one end of the rotation pin 141, and the thread 141a is screwed into the hinge hole 121 of the outer housing 120.

본 발명에 있어, 나사산(141a)이 형성된 회동핀(141)의 길이는 충분히 확보하여 시트벨트의 인출/인입 작동 중에 회동핀(141)이 힌지공(121) 내에서 완전히 이탈되지 않도록 하는 것이 바람직하다.In the present invention, it is preferable that the length of the pivot pin 141 in which the thread 141a is formed is sufficiently secured so that the pivot pin 141 is not completely released from the hinge hole 121 during the draw / retract operation of the seat belt. Do.

회동핀(141)에는 샤프트(150)의 회동축이 끼워 조립될 수 있도록 체결공(144)이 형성된다.Rotating pin 141 is formed with a fastening hole 144 so that the rotating shaft of the shaft 150 is fitted.

이러한 스프링 홀더(140)는 외측 하우징(120)의 힌지공(121)에 힌지핀(141)이 나사 체결된 후에, 힌지핀(141)으로 태엽스프링(130)이 조립되어 플레이트(142)와 태엽스프링(130)의 측부 일단이 접하게 된다.The spring holder 140 has the hinge pin 141 screwed to the hinge hole 121 of the outer housing 120, the spring spring 130 is assembled with the hinge pin 141, the plate 142 and the mainspring One end of the side of the spring 130 is in contact.

특히, 본 발명에 있어 플레이트(142)에는 플레이트 면과 동일 평면상에 위치하도록 방사형으로 다수의 날개(143)가 추가로 일체로 형성된다.In particular, in the present invention, a plurality of wings 143 are radially formed integrally with the plate 142 so as to be coplanar with the plate surface.

다수의 날개(143)는 플레이트(142)와 함께 태엽스프링(130)의 측부 일단을 지지하게 된다.The plurality of wings 143 may support one end of the side of the mainspring 130 together with the plate 142.

또한, 본 발명에 있어 스프링 홀더의 표면에는 크롬 도금이 됨을 특징으로 한다.In the present invention, the surface of the spring holder is characterized in that the chromium plating.

이와 같이 구성된 본 발명의 시트벨트용 리트렉터의 작동 예를 살펴보면 다음과 같다.Looking at the operation example of the seat belt retractor of the present invention configured as described above are as follows.

도 4는 시트벨트가 샤프트(150)가 감겨 있는 상태를 도시한 도면으로, 스프링 홀더의 힌지핀(141) 일단은 외측 하우징(120)의 힌지공(121)에 나사 체결된 상태에서 외측 하우징(120)과 플레이트는 이격된 상태를 유지하고 있다.4 is a view illustrating a state in which the seat belt is wound around the shaft 150, and one end of the hinge pin 141 of the spring holder is screwed into the hinge hole 121 of the outer housing 120. 120) and the plate are kept spaced apart.

즉, 태엽스프링(130)과 외측 하우징(120) 사이에는 스프링 홀더(140)의 플레이트가 위치하게 되며, 태엽스프링(130)과 외측 하우징(120)과는 직접적인 접촉은 없는 상태이다.That is, the plate of the spring holder 140 is positioned between the mainspring 130 and the outer housing 120, and there is no direct contact between the mainspring 130 and the outer housing 120.

다음으로 도 5를 참고하면, 시트벨트가 인출되는 경우에, 시트벨트의 인출과 함께 샤프트(150)가 회전하면서 샤프트(150)의 일측 단부에 고정된 스프링 홀더 (140)가 같이 회전한다. 이때, 외측 하우징(120)의 힌지공(121) 내에 나사 체결된 힌지핀(141)이 나사 체결 방향의 반대 방향으로 회전하면서 플레이트(132) 및 날개(143)가 태엽스프링(130)을 바깥쪽(즉, 외측 하우징과 태엽스프링이 멀어지는 방향)으로 밀면서 태엽스프링(130)의 팽창이 이루어진다.Next, referring to FIG. 5, when the seat belt is drawn out, the spring holder 140 fixed to one end of the shaft 150 rotates together while the shaft 150 rotates with the seat belt pulled out. At this time, the hinge pin 141 screwed into the hinge hole 121 of the outer housing 120 rotates in the opposite direction to the screw fastening direction, so that the plate 132 and the blade 143 move the spring spring 130 outward. (I.e., the direction in which the outer housing and the spring spring away) is pushed in the expansion of the spring spring 130.

다른 한편, 시트벨트가 다시 인입되는 경우에는 태엽스프링(130)이 원래 형상으로 리턴됨과 동시에 힌지핀(141)은 나사 체결 방향으로 외측 하우징(120)의 힌지공(121) 내에 삽입된다.On the other hand, when the seat belt is retracted, the spring spring 130 is returned to its original shape and the hinge pin 141 is inserted into the hinge hole 121 of the outer housing 120 in the screw fastening direction.

이상과 같이, 시트벨트의 인출 또는 인입 시에 스프링 홀더(140)의 힌지핀(141)이 힌지공(121) 내에서 인입 또 인출되면서 태엽스프링(130)과 외측 하우징(120)이 직접 접촉하는 것을 방지한다.As described above, while the hinge pin 141 of the spring holder 140 is drawn in and drawn out in the hinge hole 121 when the seat belt is pulled in or out, the spring spring 130 and the outer housing 120 directly contact each other. To prevent them.

한편, 본 발명의 실시예에서는 외측 하우징의 힌지공 내경에 나사산이 형성되며, 스프링 홀더의 힌지핀 외주면에 나사산이 형성되어 힌지핀이 외측 하우징에 나사 체결되는 것으로 설명하고 있으나, 이러한 나사 체결구조는 다양하게 변형이 가능함은 본 발명의 기술적 범위 내에서 다양하게 선택 또는 변형이 가능하다.On the other hand, in the embodiment of the present invention, the screw thread is formed in the inner diameter of the hinge hole of the outer housing, the screw thread is formed on the outer peripheral surface of the hinge pin of the spring holder has been described that the hinge pin is screwed to the outer housing, this screw fastening structure Various modifications may be made or modified in various ways within the technical scope of the present invention.

예를 들어, 외측 하우징 중앙에 돌설된 힌지돌기가 구비되며 이 힌지돌기 외주면에 숫나사산이 형성되도록 하며, 스프링 홀더의 힌지핀에 힌지돌기와 나사 체결될 수 있는 암나사산이 형성되어 스프링 홀더가 외측 하우징에 나사 체결되는 구조일 수가 있다.For example, a hinge protrusion protruding from the center of the outer housing is provided, and a male thread is formed on the outer circumferential surface of the hinge protrusion, and a female thread that can be screwed with the hinge protrusion is formed on the hinge pin of the spring holder so that the spring holder is screwed on the outer housing. It may be a fastening structure.

이상과 같은 본 발명의 시트벨트용 리트렉터는, 시트벨트의 인출/인입 방향에 따라서 태엽스프링 측부 일단을 지지하는 스프링 홀더가 외측 하우징에 나사 체결되면서 전진 또는 후진하여 태엽스프링의 동작 중에 외측 하우징과 직접적인 접촉이 발생되는 것을 방지하여, 태엽스프링의 권취력이 저하되는 것을 방지할 수 있는 효과가 있는 발명인 것이다.The seat belt retractor of the present invention as described above, the spring holder for supporting one end of the spring spring side according to the withdrawal / retraction direction of the seat belt is fastened or retracted while being screwed to the outer housing so that the outer housing and It is an invention which has an effect which can prevent a direct contact from generate | occur | producing and can prevent the winding force of a spring spring from falling.

Claims (3)

시트벨트가 연결되는 샤프트의 회동축을 탄성 지지하는 태엽스프링을 포함하는 시트벨트용 리트렉터에 있어서,In the retractor for seat belts comprising a spring spring to elastically support the rotation axis of the shaft to which the seat belt is connected, 중앙에 나사산이 형성된 하우징과;A housing in which a thread is formed at the center; 상기 태엽스프링의 측부 일단과 접하는 플레이트가 구비되며, 이 플레이트 중앙에서 수직 돌출되어 상기 하우징에 나사 체결되는 회동핀의 타측으로 상기 샤프트의 회동축이 고정되도록 체결공이 형성된 스프링 홀더를 포함하는 것을 특징으로 하는 시트벨트용 리트렉터.And a plate in contact with one end of the side spring of the mainspring, and a spring holder having a fastening hole formed so that the pivot shaft of the shaft is fixed to the other side of the pivot pin which is vertically protruded from the center of the plate and screwed to the housing. Retractor for seat belt 제1항에 있어서, 상기 플레이트에는 동일 평면상에 방사형으로 다수의 날개가 추가로 형성되는 것을 특징으로 하는 시트벨트용 리트렉터.The seat belt retractor according to claim 1, wherein the plate further includes a plurality of wings radially disposed on the same plane. 제1항에 있어서, 상기 스프링 홀더의 표면에는 크롬 도금이 추가로 형성된 것을 특징으로 하는 시트벨트용 리트렉터.The seat belt retractor according to claim 1, wherein chromium plating is further formed on the surface of the spring holder.
KR1020050102814A 2005-10-31 2005-10-31 Retractor for seat belt KR100680593B1 (en)

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