JP2010149653A - Shock absorbing caster - Google Patents

Shock absorbing caster Download PDF

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JP2010149653A
JP2010149653A JP2008328958A JP2008328958A JP2010149653A JP 2010149653 A JP2010149653 A JP 2010149653A JP 2008328958 A JP2008328958 A JP 2008328958A JP 2008328958 A JP2008328958 A JP 2008328958A JP 2010149653 A JP2010149653 A JP 2010149653A
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caster
impact
wheel
absorbing
link
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Takashi Mutsuro
崇志 無津呂
Noriyuki Matsunaga
紀之 松永
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Matsunaga Manufactory KK
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Matsunaga Manufactory KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a shock absorbing caster for a light vehicle, capable of absorbing vibration and shock received from the unevenness of a road surface and easily adjusting the height of a wheel. <P>SOLUTION: An elastic member 20 of the shock absorbing caster 100 is attached to the front of a bolt (axle) 17 and the wheel 16. As a result, this shock absorbing caster has a good shock absorbing property and is capable of easily adjusting the height of the wheel. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、走行時の路面の凹凸を吸収する衝撃吸収性が高く、車輪の高さの調節が容易な軽車両用の衝撃吸収キャスターに関する。   The present invention relates to an impact-absorbing caster for a light vehicle that has a high impact-absorbing property that absorbs unevenness of a road surface during traveling and that allows easy adjustment of wheel height.

車椅子や台車等の軽車両に着設する回動自在なキャスターは車輪が小さく弾力性が少ない故に、走行時に路面の凹凸がそのまま車体に伝わり、車椅子の場合には座乗者の疼痛を増強したり、不快感を与えたり、台車等の場合は、積載物に損傷を与える危険性もある。このキャスターの車輪が走行時に路面の凹凸から受ける衝撃を吸収するために様々な衝撃吸収キャスターが考案されている。   Since the casters that can be freely mounted on light vehicles such as wheelchairs and trolleys have small wheels and little elasticity, the unevenness of the road surface is transmitted to the vehicle body as it travels. In the case of a cart or the like, there is a risk of damaging the load. Various shock absorbing casters have been devised in order to absorb the impact that the wheels of the caster receive from the unevenness of the road surface during traveling.

特許文献１の請求項１に開示の考案は、台車に取り付けられるブラケットにリンクを介して車輪を支持したキャスターにおいて、前記リンクの端部をブラケットの回転軸に対してリンクの揺動運動に伴って捩り変形を生じるゴム部材を介して結合し、かつリンクとブラケットをリンクの揺動運動を減衰するダンパで連結したことを特徴とするキャスターとしている。この結果、台車の荷重に応じて車輪とブラケットを結ぶリンクのゴム部材が捩り変形し、リンクの傾きが決まり、また車輪の上下動に伴うリンクの揺動運動は、ダンパにより減衰される効果を有することが開示されている。   The invention disclosed in claim 1 of Patent Document 1 is a caster in which a wheel is supported by a bracket attached to a carriage via a link, and the end of the link is caused to swing with respect to the rotation axis of the bracket. The caster is characterized in that it is coupled through a rubber member that causes torsional deformation, and the link and the bracket are connected by a damper that attenuates the swinging motion of the link. As a result, the rubber member of the link connecting the wheel and the bracket is torsionally deformed according to the load of the carriage, the inclination of the link is determined, and the swinging motion of the link accompanying the vertical movement of the wheel is attenuated by the damper. It is disclosed to have.

特許文献２の考案は、請求項１に、車体側に結合されるブラケットと、前記ブラケットに回動可能に連結されるリンクと、前記リンクに回転可能に連結される車輪とを備えるキャスターにおいて、前記リンクの回動に伴って伸縮するコイルスプリングを備え、前記コイルスプリングの表面にゴム材を被覆して緩衝層を形成したことを特徴とするキャスターが開示されている。キャスターへの入力に応じてコイルスプリングが収縮すると、緩衝層どうしが接触して弾性変形することにより、緩衝層の内部摩擦により、キャスターが路面の凹凸等から受ける振動や衝撃を吸収する効果を有するとされている。   The invention of Patent Document 2 is a caster comprising a bracket coupled to the vehicle body side, a link rotatably coupled to the bracket, and a wheel rotatably coupled to the link. A caster is disclosed that includes a coil spring that expands and contracts as the link rotates, and a buffer layer is formed by coating a rubber material on the surface of the coil spring. When the coil spring contracts in response to the input to the caster, the buffer layers come into contact with each other and elastically deform, so that the caster has the effect of absorbing vibrations and shocks received from the road surface unevenness due to the internal friction of the buffer layer. It is said that.

特許文献３の請求項１に記載の考案は、車体側に結合されるブラケットと、前記ブラケットに回動可能に連結されるリンクと、前記リンクに回転可能に連結される車輪と、前記リンクの回動に伴って圧縮変形する圧縮ゴムブロックとを備え、前記圧縮ゴムブロックをその内部に流体室を有する中空構造とし、前記流体室に粘性流体を封入したことを特徴とするキャスターが開示されている。この発明において、キャスターへの入力に応じて圧縮ゴムブロックが弾性変形するとともに、流体室に封入された粘性流体が流動する。これに伴って生じる圧縮ゴムブロックの内部摩擦と、粘性流体の流動抵抗により、リンクの揺動が減衰されてキャスターが路面の凹凸から受ける振動や衝撃を吸収する効果を有していることが開示されている。   The device described in claim 1 of Patent Document 3 includes a bracket coupled to the vehicle body side, a link rotatably coupled to the bracket, a wheel rotatably coupled to the link, and a link of the link. There is disclosed a caster comprising: a compression rubber block that compresses and deforms with rotation, the compression rubber block having a hollow structure having a fluid chamber therein, and a viscous fluid sealed in the fluid chamber. Yes. In this invention, the compression rubber block is elastically deformed in response to the input to the caster, and the viscous fluid enclosed in the fluid chamber flows. It is disclosed that due to the internal friction of the compressed rubber block and the flow resistance of the viscous fluid caused by this, the swing of the link is damped and the caster has the effect of absorbing the vibration and impact received from the road surface irregularities. Has been.

特許文献４の段落[０００８]には、車椅子の前部に着設したキャスターが走行路面等から受ける衝撃を減少させるために鋭意研究を重ねた結果、キャスターを支持するリンクを２枚用いてタイヤを支持し、車椅子の走行時に路面等からタイヤが受ける衝撃を２枚のリンクを介してバネやゴムなどの弾性部材によって吸収するキャスターが開示されている。特許文献４のキャスターは、２枚のリンクを介してバネやゴムなどの弾性部材によって、衝撃を吸収するキャスターが開示されている。   In paragraph [0008] of Patent Document 4, as a result of intensive studies to reduce the impact received by the casters attached to the front part of the wheelchair from the road surface, etc., tires using two links supporting the casters are used. A caster is disclosed that absorbs an impact received by a tire from a road surface or the like during traveling of a wheelchair by an elastic member such as a spring or rubber via two links. As for the caster of patent document 4, the caster which absorbs an impact with elastic members, such as a spring and rubber, via two links is indicated.

上記のように路面の凹凸から受ける振動や衝撃を吸収する各種のタイプの衝撃吸収が可能な衝撃吸収キャスターが考案されているが、これらのキャスターの弾性部材はボルトと車輪の間に着設されているために、車輪の高さを調節できないという問題があり、車輪の高さを簡単に調節できる衝撃吸収性のよい衝撃吸収キャスターの出現が望まれている。
特開２０００−２２５８０３号公報 特開２００１−２７７８０７号公報 特開２００１−２８７５０３号公報 特開２００６−３４１７２３号公報 As described above, shock absorbing casters capable of absorbing various types of shocks that absorb vibrations and shocks received from road surface irregularities have been devised, but the elastic members of these casters are installed between bolts and wheels. Therefore, there is a problem that the height of the wheel cannot be adjusted, and the appearance of a shock-absorbing caster with good shock absorption that can easily adjust the height of the wheel is desired.
JP 2000-225803 A JP 2001-277807 A JP 2001-287503 A JP 2006-341723 A

本願発明は、路面の凹凸から受ける振動や衝撃を吸収する共に、車輪の高さを簡単に調節することができる軽車両用の衝撃吸収キャスターを提供するものである。   The present invention provides an impact-absorbing caster for a light vehicle that absorbs vibrations and impacts received from road surface irregularities and can easily adjust the height of wheels.

車椅子や台車等の軽車両に着設するキャスターが走行時に路面の凹凸等から受ける衝撃を吸収して、車体への衝撃を減少させると共に、キャスターの車輪の高さを簡単に調節することができる衝撃吸収キャスターを提供するために鋭意研究を重ねた結果、キャスターの弾性部材をボルト（車軸）と車輪の前に着設することによって、車輪の高さを容易に調節できる衝撃吸収性のよい軽車両用の衝撃吸収キャスターとした。   A caster attached to a light vehicle such as a wheelchair or a cart absorbs the impact received from the unevenness of the road surface during traveling, reduces the impact on the vehicle body, and can easily adjust the height of the wheel of the caster. As a result of intensive research to provide shock absorbing casters, by installing the elastic members of the casters in front of the bolts (axles) and the wheels, it is possible to easily adjust the height of the wheels. A shock absorbing caster for vehicles was used.

本願発明の特徴は、ボルトで車体に連結される軽車両用の衝撃吸収キャスターであって、該衝撃吸収キャスターの衝撃を吸収する弾性部材がボルトの前方に着設されていることを特徴とする軽車両用の衝撃吸収キャスターである。本発明の衝撃吸収性キャスターは弾性部材が車輪の直ぐ上にないので、低床タイプの車椅子や台車等の軽車両に着設することができる。さらに、ボルトと車輪の間の空間が広くなり、車輪の高さ調節が可能となった。   A feature of the present invention is an impact absorbing caster for a light vehicle connected to a vehicle body by a bolt, wherein an elastic member for absorbing the impact of the impact absorbing caster is attached to the front of the bolt. It is a shock absorbing caster for light vehicles. Since the impact-absorbing caster of the present invention does not have an elastic member right above the wheel, it can be attached to a light vehicle such as a low-floor type wheelchair or a carriage. In addition, the space between the bolt and the wheel is widened, and the height of the wheel can be adjusted.

本願発明の別の特徴は、衝撃吸収キャスターの衝撃を吸収する弾性部材がコイルバネ部材であることを特徴とする軽車両用の衝撃吸収キャスターである。   Another feature of the present invention is an impact-absorbing caster for a light vehicle, wherein the elastic member that absorbs the impact of the impact-absorbing caster is a coil spring member.

本願発明の別の特徴は、衝撃吸収キャスターの衝撃を吸収する弾性部材が圧縮ゴムブロックであることを特徴とする車椅子、台車等の軽車両用の衝撃吸収キャスターである。   Another feature of the present invention is an impact-absorbing caster for a light vehicle such as a wheelchair or a carriage, wherein the elastic member that absorbs the impact of the impact-absorbing caster is a compression rubber block.

車椅子や台車等の軽車両に着設されるキャスターの車輪の弾性部材を車軸の前方に着設することによって、ボルトと車輪の間が広くなり、従来のキャスターに比較して車輪の高さを調節する範囲を広くすることができる。また、キャスターが路面から受ける衝撃を直接ボルトに伝えることがないので、路面から受ける衝撃を弾性部材によってより柔らかく受け止められる。弾性部材に圧縮ゴムやバネ部材を用いることによって、弾性の調節を容易にすると共に、耐久性を増すことができる。   By installing the elastic member of the wheel of a caster installed in a light vehicle such as a wheelchair or a carriage in front of the axle, the space between the bolt and the wheel is widened, and the height of the wheel is increased compared to a conventional caster. The range to be adjusted can be widened. Further, since the impact received by the caster from the road surface is not directly transmitted to the bolt, the impact received from the road surface can be received softer by the elastic member. By using a compression rubber or a spring member as the elastic member, the elasticity can be easily adjusted and the durability can be increased.

以下に図面を用いて本願発明の実施の態様について好ましい形態を例示するが、本実施例は特許請求の範囲に記載された発明の範囲を限定するものではない。本願発明の軽車両用の衝撃吸収キャスターは車椅子や台車等の軽車両用として使用されるものであるが、以下の実施例においては車椅子に着設する例を上げて説明する。   Preferred embodiments of the present invention will be described below with reference to the drawings. However, this embodiment does not limit the scope of the invention described in the claims. The shock absorbing caster for a light vehicle according to the present invention is used for a light vehicle such as a wheelchair or a carriage. In the following embodiments, an example of mounting on a wheelchair will be described.

図１は、背もたれ部１１と座部１２が着設された車椅子１０の下部に主車輪１４とその前方にキャスター１５とフットレスト１３が着設されている。この車椅子１０のキャスター１５に代えて本願発明の軽車両用の衝撃吸収キャスターを装着することができる。本願発明の衝撃吸収キャスター１００を装着することができる車椅子１０は自走用、介助用等のいずれの車椅子にも着設することができる。   In FIG. 1, a main wheel 14 and a caster 15 and a footrest 13 are attached to a lower portion of a wheelchair 10 on which a backrest portion 11 and a seat portion 12 are attached. Instead of the caster 15 of the wheelchair 10, an impact absorbing caster for a light vehicle according to the present invention can be mounted. The wheelchair 10 to which the shock absorbing caster 100 of the present invention can be attached can be attached to any wheelchair for self-propelled use or assistance.

一般に、車椅子１０の前部に着設されているキャスター１５は小さくて車輪１６が堅いために走行時の路面の小さな凹凸から受ける衝撃をそのまま車椅子に伝えてしまうために、座乗者に不快感を与えている。このような車椅子の走行時に、座乗者が受ける路面の凹凸の衝撃を吸収する目的で、図５、図６に示すように弾性部材２０としてバネ部材２５が装着された衝撃吸収キャスターがある。図５，図６に示すような従来のキャスター１５はキャスター旋回軸であるボルト１７で着設されている。このような衝撃吸収性のキャスター１５の弾性部材２０は車輪１６とボルト１７の間に着設されているためにキャスター１５の全高が高くなり、低床車椅子（座面の低い車椅子）に使用することが困難であった。また、キャスター１５のボルト１７と車輪１６との間に弾性部材２０が着設されているために車輪１６の高さを調節する範囲が狭いという問題があった。   In general, the caster 15 attached to the front part of the wheelchair 10 is small and the wheels 16 are stiff, so that the impact received from the small unevenness of the road surface during traveling is transmitted to the wheelchair as it is, which is uncomfortable for the occupant Is given. As shown in FIGS. 5 and 6, there is an impact absorbing caster in which a spring member 25 is mounted as an elastic member 20 for the purpose of absorbing the impact of the road surface unevenness received by the occupant during traveling of the wheelchair. A conventional caster 15 as shown in FIGS. 5 and 6 is attached by a bolt 17 which is a caster turning shaft. Since the elastic member 20 of such an impact-absorbing caster 15 is attached between the wheel 16 and the bolt 17, the total height of the caster 15 is increased and used for a low-floor wheelchair (a wheelchair with a low seating surface). It was difficult. Further, since the elastic member 20 is attached between the bolt 17 of the caster 15 and the wheel 16, there is a problem that the range for adjusting the height of the wheel 16 is narrow.

図２に示す本願発明の衝撃吸収キャスター１００は、ボルト（車軸）１７にブラケット１８が着設されている。このブラケット１８に軸着したピン２１によってリンク１９が回動自在に軸着されている。このリンク１９に着設されたピン２２はリンク１９を補強するものである。このリンク１９の下に車輪１６がピン２３で軸着されている。車輪の高さはリンク１９に穿設された穴２３ａ、２３ｂ、２３ｃの３段階に調節することができる。   In the shock absorbing caster 100 of the present invention shown in FIG. 2, a bracket 18 is attached to a bolt (axle) 17. A link 19 is pivotally supported by a pin 21 that is pivotally attached to the bracket 18. The pin 22 attached to the link 19 reinforces the link 19. Under this link 19, a wheel 16 is pivotally attached by a pin 23. The height of the wheel can be adjusted in three stages: holes 23a, 23b and 23c formed in the link 19.

本願発明の衝撃吸収キャスター１００は衝撃を吸収する弾性部材２０が車輪１６の直ぐ上にないので、低床タイプの車椅子や台車等にも着設することができる。また、弾性部材２０の反発力が直接ボルト１７に伝わらず、弾性部材２０が着設されたリンク１９で吸収されてブラケット１８から車体に伝わるので、車椅子や台車等への衝撃はさらに和らげられる。   Since the impact absorbing caster 100 of the present invention does not have the elastic member 20 that absorbs the impact directly above the wheel 16, it can be attached to a low-floor type wheelchair or a cart. Further, since the repulsive force of the elastic member 20 is not directly transmitted to the bolt 17 but is absorbed by the link 19 on which the elastic member 20 is attached and transmitted from the bracket 18 to the vehicle body, the impact on the wheelchair, the carriage, etc. is further alleviated.

図３は、本願発明の衝撃吸収キャスター１００を分解した状態を示す。ブラケット１８にボルト１７を着設し、ブラケット１８の前方に弾性部材２０を着設し、該弾性部材２０の上からリンク１９を上下動可能に冠着する。リンク１９はブラケット１８に回動可能にピン２１で軸着する。ピン２２はリンク１９を補強するものである。車輪１６はリンク１９の下部に穿設された孔２３ａ、２３ｂ、２３ｃの何れかで任意の高さになるようにピン２３で軸着する。   FIG. 3 shows a state where the shock absorbing caster 100 of the present invention is disassembled. A bolt 17 is attached to the bracket 18, an elastic member 20 is attached to the front of the bracket 18, and a link 19 is attached from above the elastic member 20 so as to be movable up and down. The link 19 is pivotally attached to the bracket 18 by a pin 21 so as to be rotatable. The pin 22 reinforces the link 19. The wheel 16 is pivotally attached by a pin 23 so as to have an arbitrary height in any one of holes 23a, 23b, and 23c formed in the lower portion of the link 19.

図４は、本発明の衝撃吸収キャスター１００の弾性部材２０として使用されるバネ部材２５（４−１）と圧縮ゴム部材２４（４−２）を図示している。本願発明の衝撃吸収キャスター１００の弾性部材２０はバネ部材２５に限定されるものではなく、天然ゴム、合成ゴム等の圧縮ゴム部材２４を弾性部材として使用することもできる。   FIG. 4 illustrates a spring member 25 (4-1) and a compression rubber member 24 (4-2) used as the elastic member 20 of the shock absorbing caster 100 of the present invention. The elastic member 20 of the shock absorbing caster 100 of the present invention is not limited to the spring member 25, and a compressed rubber member 24 such as natural rubber or synthetic rubber may be used as the elastic member.

図５に示す従来のタイプの衝撃吸収キャスターは、キャスター１５の旋回軸であるボルト１７の下にブラケット１８が着設されている。ブラケット１８に軸着したピン２１によってリンク１９が回動自在に軸着されている。このピン２１より後に弾性部材２０がブラケット１８とリンク１９の間に上下方向に着設されている。ピン２１と車輪１６の間に弾性部材２０が着設されている。   The conventional type of shock absorbing caster shown in FIG. 5 has a bracket 18 attached under a bolt 17 that is a pivot shaft of the caster 15. A link 19 is pivotally supported by a pin 21 that is pivotally attached to the bracket 18. The elastic member 20 is attached in the vertical direction between the bracket 18 and the link 19 after the pin 21. An elastic member 20 is attached between the pin 21 and the wheel 16.

図６に示す従来のタイプの衝撃吸収キャスターは、キャスターの旋回軸であるボルト１７の下にブラケット１８が着設されているい。ブラケット１８に軸着したピン２１によってリンク１９が回動自在に軸着されている。このピン２１より後に弾性部材２０がブラケット１８とリンク１９の間に斜め方向に着設されている。   The conventional type of impact absorbing caster shown in FIG. 6 has a bracket 18 attached under a bolt 17 which is a pivot shaft of the caster. A link 19 is pivotally supported by a pin 21 that is pivotally attached to the bracket 18. The elastic member 20 is attached in an oblique direction between the bracket 18 and the link 19 after the pin 21.

本発明の衝撃吸収キャスター着設することができる車椅子の斜視図である。It is a perspective view of the wheelchair which can install the shock absorption caster of the present invention. 本発明の衝撃吸収キャスターの斜視図を示す。The perspective view of the shock absorption caster of the present invention is shown. 本発明の衝撃吸収キャスターを分解した斜視図を示す。The perspective view which decomposed | disassembled the impact-absorbing caster of this invention is shown. 本発明の衝撃吸収キャスターに使用する弾性部材の側面図を示す。The side view of the elastic member used for the shock absorption caster of this invention is shown. 従来の衝撃吸収キャスターの側面図を示す。The side view of the conventional impact-absorbing caster is shown. 従来の衝撃吸収キャスターの側面図を示す。The side view of the conventional impact-absorbing caster is shown.

符号の説明Explanation of symbols

１００：本発明の衝撃吸収キャスター
１０：車椅子
１１：背もたれ部
１２：座部
１３：フットレスト
１４：主車輪
１５：キャスター
１６：キャスターの車輪
１７：ボルト
１８：ブラケット
１９：リンク
２０：弾性部材
２１：ブラケットを受けるピン
２２：リンク用のピン
２３：車輪用のピン
２４：ゴム部材
２５：バネ部材 DESCRIPTION OF SYMBOLS 100: Shock absorption caster 10 of this invention: Wheelchair 11: Backrest part 12: Seat part 13: Footrest 14: Main wheel 15: Caster 16: Caster wheel 17: Bolt 18: Bracket 19: Link 20: Elastic member 21: Bracket Pin 22 for receiving: Pin 23 for link: Pin 24 for wheel 24: Rubber member 25: Spring member

Claims (3)

ボルトで車体に連結される軽車両用の衝撃吸収キャスターであって、該衝撃吸収キャスターの衝撃を吸収する弾性部材がボルトの前方に着設されていることを特徴とする軽車両用の衝撃吸収キャスター。 An impact absorbing caster for a light vehicle connected to a vehicle body by a bolt, wherein an elastic member for absorbing the impact of the impact absorbing caster is attached in front of the bolt, caster. 衝撃吸収キャスターの衝撃を吸収する弾性部材がコイルバネ部材であることを特徴とする請求項１に記載の軽車両用の衝撃吸収キャスター。 The shock absorbing caster for a light vehicle according to claim 1, wherein the elastic member for absorbing the shock of the shock absorbing caster is a coil spring member. 衝撃吸収キャスターの衝撃を吸収する弾性部材が圧縮ゴム部材であることを特徴とする請求項１に記載の軽車両用の衝撃吸収キャスター。 2. The impact absorbing caster for a light vehicle according to claim 1, wherein the elastic member for absorbing the impact of the impact absorbing caster is a compression rubber member.
JP2008328958A 2008-12-25 2008-12-25 Shock absorbing caster Pending JP2010149653A (en)

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Country Link
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012116336A (en) * 2010-11-30 2012-06-21 Nansin Co Ltd Caster which has buffer mechanism
CN103009921A (en) * 2012-10-29 2013-04-03 周树成 Damping trundle
US20140109341A1 (en) * 2012-10-19 2014-04-24 Ross Design & Engineering, Inc. Vertically adjustable caster wheel apparatus
CN103950360A (en) * 2014-04-22 2014-07-30 江门市垃圾虫智能清洁设备制造有限公司 Front wheel vibration absorption device for road sweeper
CN105395322A (en) * 2015-12-22 2016-03-16 苏州凯道智能设备有限公司 Front fork for electric wheelchair with shock-absorbing device
JP2016525441A (en) * 2013-07-19 2016-08-25 プロドーズ Aircraft drinking water supply pipe cleaning equipment
US10766058B2 (en) 2013-07-19 2020-09-08 Prodose Sarl Device for cleaning, especially the pipes of the drinking water circuit of an aircraft
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012116336A (en) * 2010-11-30 2012-06-21 Nansin Co Ltd Caster which has buffer mechanism
US20140109341A1 (en) * 2012-10-19 2014-04-24 Ross Design & Engineering, Inc. Vertically adjustable caster wheel apparatus
US8839487B2 (en) * 2012-10-19 2014-09-23 Ross Design & Engineering, Inc. Vertically adjustable caster wheel apparatus
CN103009921A (en) * 2012-10-29 2013-04-03 周树成 Damping trundle
JP2016525441A (en) * 2013-07-19 2016-08-25 プロドーズ Aircraft drinking water supply pipe cleaning equipment
US10766058B2 (en) 2013-07-19 2020-09-08 Prodose Sarl Device for cleaning, especially the pipes of the drinking water circuit of an aircraft
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CN105395322A (en) * 2015-12-22 2016-03-16 苏州凯道智能设备有限公司 Front fork for electric wheelchair with shock-absorbing device
WO2021132534A1 (en) * 2019-12-27 2021-07-01 Ｗｈｉｌｌ株式会社 Electric mobility scooter
JPWO2021132534A1 (en) * 2019-12-27 2021-12-23 Ｗｈｉｌｌ株式会社 Electric mobility
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