558441 A7 B7_ 五、發明説明（1 ) [產業上之利用領域] (請先閲讀背面之注意事項再填寫本覓) 本發明係關於輪椅用前輪支撐機構，尤其是有關支撐 輪椅的前輪的支撐構件。 [先前之技術] 對於因事故、生病、老年等而下半身行動不方便的人 ，輪椅係取代腳。輪椅雖主要爲室內使用，但因隨著社會 的無障礙化的進展，屋外的使用也漸漸地盛行。因此，由 路面的凹凸或障礙物使乘員所承受的振動或衝撃，係成爲 大問題。對於行動不方便的乘員，振動或衝撃係爲更損害 健康的原因。習知一般的輪椅，因爲只是將由小直徑的實 心輪胎所構成的前輪，就這樣地支撐在車體框架，因爲幾 乎無法緩和上述振動或衝擊。這幾年，係採用將如第9(a) 圖所示的通過彈簧11支撐前輪丨的機構1 〇。但是，前輪及 後輪的間隔狹窄。且，乘員乘座在輪椅上的話，因頭較重 而使重心變高。因此，乘員所乘的輪椅，一點也不安定。 經濟部智慧財產局Μ工消費合作社印製 習知技術係有：日本特開平7_8 1 652，其公開日爲1995 年3月28日。 [發明的揭示] (本發明所欲解決的課題） 對於上述機構10所採用的輪椅，彈簧U較軟的情況 時，會發生下列的問題。 (1 )當乘員於乘座時偏離輪椅的中心的話，彈簧1 1緊 本紙張尺度適用中國國家標隼（CNS ) Α4規格（2丨0'〆297公釐） -4 - 558441 A7 B7 五、發明説明（2 ) 縮，而使輪椅傾斜。 (請先閱讀背面之注意事項再填寫本頁) (2) 當乘員欲拾起路面6上的物品而傾斜身體的話，彈 簧11緊縮，而使輪椅傾斜。 (3) 在第9圖中，輪椅朝箭頭A方向進行，而前輪1， 如第9(b)圖所示，與障礙物61衝突的話，彈簧11緊縮， 使輪椅的前側會下沈H1，而使乘員前傾。 如此，彈簧11較軟的情況時，乘員會感受到翻倒的恐 怖感。相反地，彈簧11較硬的情況時，由路面的凹凸等使 乘員承受的振動或衝擊，幾乎不被緩和。 本發明，係以提供：可以緩和由路面的凹凸等使乘員 承受的振動或衝擊，且，可以減少乘員所感受到的翻倒的 恐怖感，的輪椅用前輪支撐機構爲目的。 (用以解決課題的手段） 申請專利範圍第1項的發明，針對支撐輪椅前輪的支 撐機構，其特徵爲： 經濟部智慧財產局8工消費合作社印製 在車體框架的下端部，具有可旋轉自如地支撐前輪的 懸架機構， 懸架機構，具有曲軸構造體，曲軸構造體，係由：可 旋轉自如地支撐在車體框架的下端部的水平支撐軸、及可 旋轉自如地支撐前輪的車軸、及對於水平支擦軸及車軸呈 垂直位置地連結水平支撐軸的一端及車軸的一端的臂，所 構成。 申請專利範圍第2項的發明，對於申請專利範圍第1 本紙張尺度適用中國國家標準（CNS ) A4規格（2丨〇><297公釐） -5- 558441 A7 B7 五、發明説明（3 ) (請先閲讀背面之注意事項再填寫本頁) 項的發明，其中，懸架機構，具有控制水平支撐軸的旋轉 動作的控制手段，且該控制手段，係控制：使車軸容易採 取，非位在水平支撐軸的正上方，而是容易位在正下方的 狀態。 申請專利範圍第3項的發明，對於申請專利範圍第1 項的發明，其中，在車體框架的下端部連結有支撐構件， 而支撐構件，可朝上下方向擺動，且，朝上方的擺動係會 承受彈性體的抵抗，而水平支撐軸，係可旋轉地支撐在支 撐構件的下端部。 申請專利範圍第4項的發明，對於申請專利範圍第3 項的發明，其中，支撐構件，係可朝縱軸周圍旋轉。 (優於習知技術的效果） 經濟部智慧財產局g(工消費合作社印製 依據申請專利範圍第1項的發明，當前輪衝突路面上 的障礙物或越過凹凸時，因爲曲軸構造體朝水平支撐軸後 方轉動，所以可以將由障礙物等所承受的衝擊朝後方避開 。因此，可以緩和由路面上的凹凸或障礙物使乘員承受的 衝擊或振動，而可以使乘員乘座舒適。 且，前輪下階梯時，因爲前輪越過階梯的瞬間，曲軸 構造體朝水平支持軸周圍轉動，使車軸位在水平支撐軸的 正下方的狀態，所以可以緩和著地時乘員所承受的衝擊。 因此，可以讓乘員乘座舒適。 依據申請專利範圍第2項的發明，因爲藉由控制手段 ，可促進曲軸構造體朝水平支撐軸周圍後方轉動，並抑制 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -6 - 558441 A7 B7 五、發明説明（4 ) (請先閱讀背面之注意事項再填寫本頁) 已轉動的曲軸構造體歸位，而可以順利地進行曲軸構造體 的動作，而可以良好地發揮申請專利範圍第1項的效果。 因此，乘員乘座舒適性更佳。 依據申請專利範圍第3項的發明，因爲前輪衝突路面 上的障礙物或越過凹凸時，支撐構件會抵抗彈性體而朝上 方擺動，所以可以將衝擊朝上方避開。而且，衝突時，因 爲與曲軸構造體的動作相結合，而使支撐構件成爲對於前 輪朝前方突出的狀態，所以可以拉長衝突時的行走方向的 變位量，由此，可以緩和瞬間的衝擊。因此，可以更緩和 由障礙物或凹凸使乘員所承受的衝撃，而可以使乘員的乘 座舒適性佳。 而且，前輪衝突路面上的障礙物或越過凹凸時，因爲 朝曲軸構造體的後方轉動、及朝支撐構件的後方的擺動， 會打消連結支撐構件的車體框架的上下的變動，所以可以 抑制輪椅的前側的下沈，且可以抑制前傾。因此，可以減 少乘員所感受到的翻倒的恐怖感。 經濟部智慈財產局員工消費合作社印製 依據申請專利範圍第4項的發明，可以利用前輪容易 進行行走方向的變換。 [實施例] 茲佐以圖面說明本發明之輪椅用前輪支撐機構° 第1圖係爲本發明的輪椅用前輪支撐機構的部分縱剖 面側視圖。第2圖係顯示第1圖的機構的部分的縱剖面前 視圖。此支撐機構，係由：連結部2、平面旋轉部3、擺動 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） -7- 558441 A7 B7 五、發明説明（5 ) 機構4及懸架機構5所構成。 連結部2，在筒體2 1內透過滾珠軸承22而具有縱旋轉 軸23。平面旋轉部3，係固定在縱旋轉軸23的下端。由此 ，隨著縱旋轉軸23的旋轉，平面旋轉部3呈平面旋轉。 擺動機構4，係由支撐構件41及所構成。支撐構件41 ，利用水平軸43使其上端旋轉結合於平面旋轉部3，而可 朝上下方向擺動。支撐構件4 1，係朝後方傾斜。且在支撐 構件41，形成向後突部411。彈簧42，係設在向後突部411 及平面旋轉部3之間，當支撐構件41朝上方擺動時，使其 抵抗支撐構件41。 而且，在支撐構件41的下端部，設有可旋轉自如地支 撐前輪1的懸架機構5。懸架機構5，具有曲軸構造體50。 曲軸構造體5 0，係由：可旋轉自如地支撐在支撐構件4 1的 下端部的水平支撐軸5 1、及可旋轉自如地支撐前輪1的車 軸52、及對於水平支撐軸5 1和車軸52呈垂直位置且連結 水平支撐軸51的一端或車軸52的一端的臂53所構成。水 平支撐軸5 1，透過滾珠軸承5 1 1被支撐在支撐構件4 1。車 軸52，透過滾珠軸承521被支撐在前輪1。第3圖係顯示 曲軸構造體50的立體圖。 懸架機構5，更具有控制水平支撐軸5 1的旋轉的控制 手段。該控制手段，係由磁石齒輪55所構成。磁石齒輪55 ，對於曲軸構造體50使車軸52位在水平支撐軸5 1的正上 方的情況時，如第4(a)圖所示，使水平支撐軸5 1側的S極 和N極、及支撐構件41側的S極和N極，設成同極彼此相 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） (請先閲讀背面之注意事項再填寫本頁) ,b衣· 訂 經濟部智慧財產局員工消費合作社印製 -8- 558441 Α7 Β7 五、發明説明（6 ) (請先閱讀背面之注意事項再填寫本頁) 對向。因此，磁石齒輪55的作用，係將水平支撐軸5 1及 支撐構件4 1的關係，從第4(a)圖的狀態朝箭頭E半轉而成 爲第4 (b)圖的狀態。 接著，說明上述結構的支撐機構的動作。第5(a)圖係 顯示衝突前的狀態，第5(b)圖係顯示衝突後的狀態。 如第5圖所示，輪椅朝箭頭A方向行走，且前輪1與 路面6上的障礙物61衝突的話，因爲曲軸構造體50朝水 平支撐軸5 1周圍朝後方（箭頭B方向0轉動，所由障礙物 61所承受的衝擊f朝後方避開，同時，因爲支撐構件41朝 水平軸43周圍抵抗彈簧42，朝上方（箭頭C方向）擺動，所 以上述衝擊f也朝上方避開。而且，衝突時，因爲藉由上 述的動作，使使支撐構件4 1成爲對於前輪1朝前方突出的 狀態，所以衝突時的行走方向的變位量S2要比第9圖的習 知的情況的S 1長。變長的話，可以緩和瞬間的衝撃。 經濟部智慧財產ΜΓ員工消費合作社印製 因此，與障礙物61衝突時，使乘員所承受的衝擊，被 緩和。即使越過路面6上的凹凸地行走，藉由同樣的動作 ，而可以緩和乘員所承受的振動或衝擊。因此，可以獲得 良好的乘座舒適性。 且，如上述，前輪1與障礙物61衝突時，因爲曲軸構 造體50朝水平支撐軸51周圍的箭頭B方向轉動，並且， 支撐構件41朝水平軸43周圍的箭頭C方向擺動，所以兩 者的動作會打消平面旋轉部3上下的變動，而使平面旋轉 部3的下沈量H2會比第9圖的習知的情況的Η1變得非常 小。因此，可以抑制衝突時的前傾。 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） -9 - 558441 A7 B7 五、發明説明（7 ) 而且，如第6圖所示，前輪1下較大的段差62時，懸 架機構5如以下動作。 在第6(a)圖的狀態下，磁石齒輪55係爲第4(a)圖的狀 態。因此，磁石齒輪5 5，使曲軸構造體5 0朝水平支撐軸 5 1周圍轉動。該狀態下，輪椅朝箭頭A方向行走，當前輪 1超過段差62的話，在那一瞬間，如第6(b)圖所示，曲軸 構造體50朝水平支撐軸51周圍轉動，並使車軸52成爲位 在水平支撐軸5 1的正下方的狀態。也就是說，磁石齒輪5 5 成爲第4(b)圖的狀態。而且，前輪1著地於路面6上的話 ，曲軸構造體50 —邊抵抗磁石齒輪55的力量，一邊朝水 平支撐軸51周圍轉動，如第6(c)圖所示，使車軸52成爲位 在水平支撐軸5 1的正上方的狀態。 如此，因爲當前輪1下段差62時，曲軸構造體50因 磁石齒輪5 5的作用而強制且瞬間地從第6(a)圖的狀態，成 爲第6(b)圖的狀態、或成爲第6(c)圖的狀態時，一邊抵抗 磁石齒輪55的力量一邊朝水平支撐軸51周圍轉動，所以 與彈簧力作用相同，前輪1下段差62時使乘員所承受的衝 擊被緩和。 然而，磁石齒輪55，即使前輪1與障礙物61衝突或越 過凹凸的情況，也可以良好地發揮曲軸構造體50的上述動 作。即，因爲磁石齒輪55，會促進曲軸構造體50朝水平支 撐軸51周圍的後方轉動，並且，抑制已轉動的曲軸構造體 50的歸位地作用，所以可以良好地發揮曲軸構造體50的上 述動作，使衝擊或振動更被緩和。 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) 衣·558441 A7 B7_ V. Description of the invention (1) [Application fields in the industry] (Please read the notes on the back before filling in this search) The present invention relates to a front wheel support mechanism for a wheelchair, especially a support member for supporting the front wheel of a wheelchair . [Previous technology] Wheelchairs are used instead of feet for people who have difficulty in lower body movements due to accidents, illness, old age, etc. Although wheelchairs are mainly used indoors, use of them outside the house has become increasingly popular due to the advancement of social accessibility. Therefore, the vibrations or shocks experienced by the occupants due to the unevenness of the road surface or obstacles are a big problem. For occupants with reduced mobility, vibration or shock are more of a cause of health damage. Conventional wheelchairs, because they only support the front wheels made of solid tires of small diameter, are supported on the body frame in this way, because it is almost impossible to mitigate the above-mentioned vibrations or shocks. In recent years, a mechanism 10 that supports the front wheels by a spring 11 as shown in FIG. 9 (a) has been adopted. However, the distance between the front and rear wheels is narrow. In addition, when the occupant is seated in a wheelchair, the center of gravity becomes high due to the heavy head. Therefore, the wheelchair the occupant took was not at all stable. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, M Industrial Consumer Cooperative. The Department of Knowledge Technology includes: Japanese Patent Laid-Open No. 7_8 1 652, and its public date is March 28, 1995. [Disclosure of the invention] (Problems to be solved by the present invention) When the spring U is soft in the wheelchair used in the mechanism 10 described above, the following problems occur. (1) If the occupant deviates from the center of the wheelchair while seated, the spring 1 1 tight paper size applies the Chinese National Standard (CNS) Α4 specification (2 丨 0'〆297 mm) -4-558441 A7 B7 V. Description of the invention (2) The wheelchair is tilted when it is retracted. (Please read the precautions on the back before filling out this page.) (2) When the occupant wants to pick up the items on the road surface 6 and tilt his body, the spring 11 is tightened to tilt the wheelchair. (3) In Figure 9, the wheelchair goes in the direction of arrow A, and the front wheel 1, as shown in Figure 9 (b), conflicts with the obstacle 61, the spring 11 is tightened, so that the front side of the wheelchair will sink H1, And the occupants lean forward. In this way, when the spring 11 is relatively soft, the occupant may feel the fear of falling over. On the other hand, when the spring 11 is relatively hard, the vibration or impact that the occupant receives due to the unevenness of the road surface or the like is hardly alleviated. The present invention aims to provide a front wheel support mechanism for a wheelchair that can reduce vibrations or impacts on the occupant caused by unevenness on the road surface, and can reduce the feeling of horror of overturning felt by the occupant. (Means to solve the problem) The invention in the first scope of the patent application for the support mechanism for supporting the front wheels of a wheelchair is characterized in that it is printed on the lower end of the car body frame by the 8th Industrial Cooperative Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. A suspension mechanism rotatably supporting the front wheel. The suspension mechanism has a crankshaft structure and a crankshaft structure. The suspension mechanism includes a horizontal support shaft rotatably supported at the lower end portion of the body frame, and an axle rotatably supporting the front wheel. And an arm that connects one end of the horizontal support shaft and one end of the axle in a vertical position with respect to the horizontal support shaft and the axle. For the invention with the scope of patent application No. 2, the Chinese paper standard (CNS) A4 (2 丨 〇 > < 297 mm) applies to the paper size of the patent application scope No. 1 -5- 558441 A7 B7 5. Description of the invention ( 3) (Please read the precautions on the back before filling out this page), the suspension mechanism has a control means to control the rotation of the horizontal support shaft, and this control means is to control: make the axle easy to take, not It is located directly above the horizontal support axis, but it is easy to be located directly below. For the invention according to claim 3, and the invention according to claim 1, a support member is connected to the lower end portion of the vehicle body frame, and the support member can swing up and down, and the upward swinging system The horizontal support shaft is rotatably supported at the lower end portion of the support member while resisting the resistance of the elastic body. For the invention according to claim 4 and the invention according to claim 3, the support member is rotatable around the longitudinal axis. (The effect is better than the conventional technology.) The Intellectual Property Bureau of the Ministry of Economic Affairs (industrial and consumer cooperatives printed the invention based on the scope of patent application No. 1 when the current wheel conflicts with obstacles on the road or passes over bumps because the crankshaft structure is facing horizontal The support shaft rotates behind, so it can avoid the impact of obstacles, etc., to the rear. Therefore, the impact or vibration of the occupants caused by the bumps or obstacles on the road surface can be eased, and the occupants can be comfortable. When the front wheel goes down the ladder, the moment the front wheel crosses the ladder, the crankshaft structure rotates around the horizontal support shaft, so that the axle is positioned directly below the horizontal support shaft, so the impact on the occupant when landing can be reduced. Make the occupants comfortable. According to the invention in the second patent application scope, because of the control method, the crankshaft structure can be promoted to rotate rearward around the horizontal support shaft, and the Chinese paper standard (CNS) A4 specification is suppressed for this paper size ( 210X297 mm) -6-558441 A7 B7 V. Description of the invention (4) (Please read the notes on the back before filling (Page) The crankshaft structure that has been rotated is returned, and the crankshaft structure can be smoothly operated, and the effect of the scope of patent application No. 1 can be well exerted. Therefore, the occupant's seat comfort is better. According to the scope of patent application According to the third invention, when the front wheel collides with an obstacle on the road surface or passes over the unevenness, the support member swings upward against the elastic body, so that the impact can be avoided upward. In the case of a collision, the The combination of actions makes the support member protrude toward the front wheels, so the amount of displacement in the walking direction during a collision can be lengthened, and the instantaneous impact can be mitigated. Therefore, obstacles or unevenness can be more mitigated. The occupant is subjected to shocks, which can improve the occupant comfort. In addition, when the front wheels collide with obstacles on the road surface or pass over bumps, because they rotate toward the rear of the crankshaft structure and swing behind the support member, Since the vertical movement of the body frame connecting the supporting members is eliminated, the sinking of the front side of the wheelchair can be suppressed, and To suppress forward leaning. Therefore, the sense of overturning horror felt by the occupants can be reduced. The Employee Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs printed the invention based on item 4 of the scope of patent application, which can easily change the walking direction by using the front wheels. [Embodiment] The following describes the front wheel support mechanism for a wheelchair according to the present invention with a drawing. Fig. 1 is a partial longitudinal sectional side view of the front wheel support mechanism for a wheelchair according to the present invention. Fig. 2 is a view showing the mechanism of Fig. 1 Partial longitudinal section front view. This support mechanism is composed of: the connecting part 2, the plane rotating part 3, the swing This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) -7- 558441 A7 B7 V. DESCRIPTION OF THE INVENTION (5) The mechanism 4 and the suspension mechanism 5 are configured. The connecting portion 2 has a vertical rotation shaft 23 through a ball bearing 22 in the cylindrical body 21. The plane rotation portion 3 is fixed to the lower end of the vertical rotation shaft 23. Thereby, as the vertical rotation shaft 23 rotates, the plane rotating portion 3 rotates in a plane. The swing mechanism 4 is constituted by a support member 41 and. The support member 41 is rotatably coupled to the plane rotating portion 3 by the horizontal shaft 43 so as to be swingable in the vertical direction. The supporting members 41 are inclined rearward. And in the support member 41, a rearward protrusion 411 is formed. The spring 42 is provided between the rearward projection 411 and the plane rotation portion 3, and when the support member 41 swings upward, it resists the support member 41. A lower end portion of the support member 41 is provided with a suspension mechanism 5 that rotatably supports the front wheel 1. The suspension mechanism 5 includes a crankshaft structure 50. The crankshaft structure 50 is composed of a horizontal support shaft 51 rotatably supported at the lower end portion of the support member 41, an axle 52 rotatably supporting the front wheel 1, and horizontal support shaft 51 and the axle. 52 is an arm 53 connected to one end of the horizontal support shaft 51 or one end of the axle 52 in a vertical position. The horizontal support shaft 51 is supported by a support member 41 through a ball bearing 5 1 1. The axle 52 is supported by the front wheel 1 through a ball bearing 521. FIG. 3 is a perspective view showing the crankshaft structure 50. As shown in FIG. The suspension mechanism 5 further includes control means for controlling the rotation of the horizontal support shaft 51. This control means is constituted by a magnet gear 55. For the magnet gear 55, when the crankshaft structure 50 has the axle 52 positioned directly above the horizontal support shaft 51, as shown in FIG. 4 (a), the S and N poles on the horizontal support shaft 51 side, And the S and N poles on the side of the support member 41 are set to be the same poles. The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page). b. Ordering printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -8-558441 Α7 Β7 V. Description of Invention (6) (Please read the precautions on the back before filling this page). Therefore, the role of the magnet gear 55 is to change the relationship between the horizontal support shaft 51 and the support member 41 from the state shown in Fig. 4 (a) toward the arrow E to a state shown in Fig. 4 (b). Next, the operation of the support mechanism having the above-mentioned structure will be described. Figure 5 (a) shows the state before the conflict, and Figure 5 (b) shows the state after the conflict. As shown in FIG. 5, if the wheelchair is walking in the direction of arrow A, and the front wheel 1 and the obstacle 61 on the road 6 collide, the crankshaft structure 50 is turned toward the rear around the horizontal support shaft 51 (arrow B direction 0, so The impact f received by the obstacle 61 is avoided backward, and at the same time, the support member 41 swings upward (in the direction of arrow C) against the spring 42 around the horizontal shaft 43, so the impact f is also avoided upward. During a collision, the support member 41 is caused to protrude forward with respect to the front wheel 1 by the above-mentioned operation. Therefore, the displacement amount S2 in the walking direction during the collision is greater than the conventional case S 1 in FIG. 9. Long. If it becomes longer, it can alleviate the instant impact. Printed by the Intellectual Property of the Ministry of Economic Affairs, MΓ Employee Consumption Cooperative. Therefore, when it collides with obstacle 61, the impact on the occupant is mitigated. With the same action, the vibration or impact experienced by the occupant can be alleviated. Therefore, good passenger comfort can be obtained. Also, as described above, when the front wheel 1 conflicts with the obstacle 61, because The crankshaft structure 50 rotates in the direction of arrow B around the horizontal support shaft 51, and the support member 41 swings in the direction of arrow C around the horizontal shaft 43. Therefore, the movement of the two will cancel the vertical movement of the plane rotating portion 3, and make the plane The sinking amount H2 of the rotating part 3 will be very small compared to Η1 in the conventional case in FIG. 9. Therefore, forward leaning during a collision can be suppressed. This paper size applies the Chinese National Standard (CNS) Α4 specification (210X297mm) (Centi) -9-558441 A7 B7 V. Description of the invention (7) Moreover, as shown in Fig. 6, when the step difference 62 under the front wheel 1 is 62, the suspension mechanism 5 operates as follows. In the state shown in Fig. 6 (a) Next, the magnet gear 55 is in the state shown in FIG. 4 (a). Therefore, the magnet gear 55 rotates the crankshaft structure 50 around the horizontal support shaft 51. In this state, the wheelchair is walking in the direction of arrow A. When the wheel 1 exceeds the step 62, at that moment, as shown in FIG. 6 (b), the crankshaft structure 50 rotates around the horizontal support shaft 51, and the axle 52 is positioned directly below the horizontal support shaft 51. In other words, the magnet gear 5 5 is shown in FIG. 4 (b). When the front wheel 1 is on the road 6, the crankshaft structure 50 rotates around the horizontal support shaft 51 while resisting the force of the magnet gear 55. As shown in FIG. 6 (c), the axle 52 becomes It is in a state directly above the horizontal support shaft 51. In this way, when the lower stage of the front wheel 1 is 62, the crankshaft structure 50 is forced and instantaneously changed from the state of FIG. 6 (a) by the action of the magnet gear 55. In the state shown in FIG. 6 (b) or the state shown in FIG. 6 (c), it rotates around the horizontal support shaft 51 while resisting the force of the magnet gear 55, so it acts like a spring force, and the front wheel 1 has a lower step difference of 62. From time to time, the impact on the occupants is reduced. However, the magnet gear 55 can satisfactorily exert the above-mentioned operation of the crankshaft structure 50 even when the front wheel 1 collides with the obstacle 61 or passes over unevenness. That is, the magnet gear 55 promotes the rotation of the crankshaft structure 50 toward the rear around the horizontal support shaft 51 and suppresses the returning function of the crankshaft structure 50 that has been rotated. Therefore, the above-mentioned crankshaft structure 50 can be well utilized. Action to make shock or vibration more mitigated. This paper size applies to China National Standard (CNS) Α4 size (210X297 mm) (Please read the precautions on the back before filling this page)
、1T 經濟部智慧財產局員工消費合作社印製 -10- 558441 A7 B7 五、發明説明（8 ) (請先閱讀背面之注意事項再填寫本頁) 如以上，對於上述結構的支撐機構，因爲由障礙物61 或凹凸或段差62使乘員所承受的衝擊或振動被緩和，所以 可以獲得良好的乘座舒適性。且，因爲可抑制衝突時的前 傾，而可以減少乘員所感受到的翻倒的恐怖感。 第7、8圖係顯示本發明的輪椅用前輪支撐機構的別的 實施例，第7圖爲部分縱剖面側視圖，第8圖爲部分縱剖 面前視圖。此實施例與上述結構的支撐機構不同之處爲： 前輪1由支撐構件41所單邊支撐、擺動機構4的彈簧42 由活塞機構44所取代。然而，此實施例中，與第1、2圖 相同的符號係表示同一構件。活塞機構44，係由：藉由水 平軸44 1旋轉結合於平面旋轉部3的缸筒442、及藉由水平 軸443旋轉結合於支撐構件41的活塞444、及橡膠構件445 所構成。活塞444，透過橡膠構件445嵌入缸筒442內。在 此例中，支撐構件41朝水平軸43周圍的上方擺動時，活 塞444 一邊抵抗橡膠構件445的力量一邊朝箭頭D方向移 動。 經濟部智慧財產局S工消費合作社印製 然而，也可以使用公知的螺旋彈簧、油壓緩衝單元等 取代活塞機構44。 [圖面之簡單說明] 第1圖係爲本發明的輪椅用前輪支撐機構的部分縱剖 面側視圖。 第2圖係顯示第1圖的機構的部分的縱剖面前視圖。 第3圖係顯示曲軸構造體的立體圖。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -11 - 558441 A7 B7 五、發明説明（9 ) 第4(a)、（b)圖係顯示磁石齒的動作原理的剖面圖。 第5 (a )、（ b)圖係顯示對於障礙物的衝突時的第1圖的 機構的動作的側視圖。 第6(a)、（b)、（c)圖係顯示下段差時的第1圖的機構的 動作的側視圖。 第7圖係顯示本發明的別的例的輪椅用前輪支撐機構 的部分縱剖面側視圖。 第8圖係顯示第7圖的機構的部分縱剖面前視圖。 第9(a)、（b)圖係顯示對於障礙物時的習知的輪椅用前 輪支撐機構的動作的側視圖。 主要元件對照表 (請先閲讀背面之注意事項再填寫本頁} 經濟部智慧財產局8工消費合作社印製 1 前輪 2 連結部 3 平面旋轉部 4 擺動機構 5 懸架機構 6 路面 10 機構 11 彈簧 21 筒體 22 滾珠軸承 23 縱旋轉軸 41 支撐構件 本紙張尺度適用中國國家標隼（CNS ) A4規格（210x297公釐） -12- 558441 A7 五、發明説明（10 ) 經濟部智葸財產局員工消費合作社印製 411 向後突部 42 彈簧 43 水平軸 44 活塞機構 441 水平軸 442 缸筒 443 水平軸 444 活塞 445 橡膠構件 50 曲軸構造體 51 水平支撐軸 511 滾珠軸承 52 車軸 521 滾珠軸承 5 3 臂 5 5 磁石齒輪 61 障礙物 62 段差 (請先閲讀背面之注意事項再填寫本頁) 衣· 訂 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 13-Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -10- 558441 A7 B7 V. Description of the invention (8) (Please read the precautions on the back before filling this page) As above, for the support structure of the above structure, because The obstacle 61 or the unevenness or the step 62 reduces the impact or vibration that the occupant is subjected to, so that a good seat comfort can be obtained. In addition, because forward leaning during a conflict can be suppressed, the horror of overturning felt by the occupants can be reduced. Figs. 7 and 8 show another embodiment of the front wheel support mechanism for a wheelchair according to the present invention. Fig. 7 is a partial longitudinal sectional side view, and Fig. 8 is a partial longitudinal sectional front view. This embodiment differs from the support mechanism of the above structure in that the front wheel 1 is unilaterally supported by the support member 41, and the spring 42 of the swing mechanism 4 is replaced by the piston mechanism 44. However, in this embodiment, the same reference numerals as those in FIGS. 1 and 2 indicate the same members. The piston mechanism 44 is composed of a cylinder tube 442 coupled to the plane rotation unit 3 by a horizontal shaft 44 1, a piston 444 coupled to a support member 41 by a horizontal shaft 443, and a rubber member 445. The piston 444 is inserted into the cylinder barrel 442 through the rubber member 445. In this example, when the support member 41 swings upward around the horizontal axis 43, the piston 444 moves in the direction of the arrow D while resisting the force of the rubber member 445. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Industrial Cooperative Cooperative. However, instead of the piston mechanism 44, a known coil spring, hydraulic buffer unit, etc. may be used. [Brief Description of the Drawings] Fig. 1 is a side view of a part of a longitudinal sectional view of a front wheel support mechanism for a wheelchair according to the present invention. Fig. 2 is a longitudinal sectional front view showing a part of the mechanism of Fig. 1; Fig. 3 is a perspective view showing a crankshaft structure. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -11-558441 A7 B7 V. Description of the invention (9) Sections 4 (a) and (b) are sectional views showing the principle of the operation of magnet teeth . Figures 5 (a) and (b) are side views showing the operation of the mechanism of Figure 1 when a collision with an obstacle occurs. Figures 6 (a), (b), and (c) are side views showing the operation of the mechanism of Figure 1 at the time of the lower step. Fig. 7 is a partial longitudinal sectional side view showing a front wheel support mechanism for a wheelchair according to another example of the present invention. Fig. 8 is a front view showing a part of the mechanism of Fig. 7 in a longitudinal section. Figures 9 (a) and (b) are side views showing the operation of a conventional front wheel support mechanism for a wheelchair when an obstacle is encountered. Comparison table of main components (please read the precautions on the back before filling out this page) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, 8 Industrial Consumer Cooperatives 1 Front wheel 2 Connecting section 3 Planar rotation section 4 Swing mechanism 5 Suspension mechanism 6 Road surface 11 Mechanism 11 Spring 21 Cylinder 22 Ball bearing 23 Longitudinal rotation shaft 41 Supporting member This paper size is applicable to Chinese National Standard (CNS) A4 (210x297 mm) -12- 558441 A7 V. Description of the invention (10) Employees ’consumption of the Intellectual Property Office Cooperative printed 411 Backward protrusion 42 Spring 43 Horizontal shaft 44 Piston mechanism 441 Horizontal shaft 442 Cylinder barrel 443 Horizontal shaft 444 Piston 445 Rubber member 50 Crankshaft structure 51 Horizontal support shaft 511 Ball bearing 52 Axle 521 Ball bearing 5 3 Arm 5 5 Magnet gear 61 Obstacles 62 steps (please read the precautions on the back before filling this page) Clothing · The size of the paper is applicable to the Chinese National Standard (CNS) A4 (210X297 mm) 13-