TWM567740U

TWM567740U - Structure of bicycle to automatically guide chain back to sprocket while the chain falls off

Info

Publication number: TWM567740U
Application number: TW107205496U
Authority: TW
Inventors: 高煜昇
Original assignee: 大陸商浩盟車料（上海）有限公司
Priority date: 2018-04-27
Filing date: 2018-04-27
Publication date: 2018-10-01

Abstract

一種可使自行車落鏈時自動導回齒盤結構，主要係於一曲柄之異於踏板的另一端設有一擋塊，以及於該曲柄之中央處內側面設有一導引塊，該擋塊可於該曲柄的另一端形成一槽溝，該導引塊上具有一導引弧面，當發生落鏈時，可藉由該擋塊擋住該鏈條，然後繼續踩動踏板使該導引塊將該鏈條向上提拉到該齒盤的上方，使該鏈條順著該導引弧面向下滑落於齒盤的鏈齒上而自動上鏈，如此便可避免發生落鏈時突然減速或停止所造成之追撞等危險，而且更是無需下車手動上鏈，而可大幅提高騎行之便利性。 The utility model relates to an automatic guide toothed disc structure for causing a bicycle to be chained, which is mainly provided with a stopper at the other end of the crank which is different from the pedal, and a guiding block is arranged on the inner side of the center of the crank, and the stopper can be Forming a groove on the other end of the crank, the guiding block has a guiding curved surface, when the chain is broken, the chain can be blocked by the stopper, and then the pedal is continuously depressed to make the guiding block The chain is pulled up to the top of the toothed disc, so that the chain slides down the chain teeth of the toothed disc along the guiding arc and is automatically wound, so as to avoid sudden deceleration or stoppage caused by the falling chain. It is dangerous to catch up, and it is even more difficult to get off the car manually, which can greatly improve the convenience of riding.

Description

可使自行車落鏈時自動導回齒盤結構 Automatically returning the toothed disc structure when the bicycle is dropped

本創作係關於一種可使自行車落鏈時自動導回齒盤結構方面的技術領域，尤指一種在自行車落鏈時只要繼續踩動踏板即能自動上鏈，而可降低落鏈時突然減速之危險及避免下車手動上鏈的麻煩之可使自行車落鏈時自動導回齒盤結構者。 The present invention relates to a technical field for automatically guiding a toothed disc structure when a bicycle is dropped, especially when the bicycle is in the chain, as long as the pedal is continuously stepped on, the automatic winding can be performed, and the sudden deceleration can be reduced when the bicycle is dropped. Danger and avoid the trouble of getting on the manual winding of the car, which can automatically lead the toothed disc structure when the bicycle is dropped.

一般習知的自行車在行進時發生落鏈之狀況時，會因喪失了驅動力而產生突然減速直至停止的情形，甚至有時會發生鏈條卡住之狀況而導致自行車驟然停止之情形，而落鏈所導致之突然減速或驟然停止之情形，係易使後方來車閃避不及而發生追撞之危險。尤其是，一般習知自行車在落鏈時通常係需下車進行手動上鏈之動作來排除落鏈之狀況，方可再繼續騎行，而下車手動上鏈不但費時費力，而且更是會弄髒雙手而非常的麻煩不方便，特別是在比賽時更是會浪費時間而造成嚴重的落後，進而影響比賽成績。 When a conventional bicycle is in a chain-falling state when traveling, a sudden deceleration until a stop occurs due to loss of the driving force, and sometimes a situation in which the chain is stuck may cause the bicycle to suddenly stop, and the bicycle falls. The sudden deceleration or sudden stop caused by the chain is likely to cause the rear car to evade and the risk of collision. In particular, it is generally known that when a bicycle is dropped, it is usually necessary to get off the vehicle to perform a manual winding action to eliminate the condition of the chain, and then continue to ride, and the manual winding is not only time-consuming and laborious, but also dirty double It is very inconvenient and inconvenient for the hand, especially in the game, it will waste time and cause serious backwardness, which will affect the performance of the game.

有鑒於此，本創作人乃係針對上述之問題，而深入構思，且積極研究改良試做而開發設計出本創作。 In view of this, the creator is developing and designing the creation based on the above-mentioned problems and in-depth conceiving, and actively researching and improving the trial.

本創作之主要目的係在於解決習知自行車在落鏈時無法即時上鏈而易因突然減速或驟然停止造成後方來車追撞之危險，以及需下車手動上鏈而具有費時費力、會弄髒雙手等非常麻煩之問題。 The main purpose of this creation is to solve the problem that the bicycle is in the chain. It is not easy to get on the chain at the same time, and it is easy to slow down or suddenly stop, causing the danger of chasing after the car, and the need to get off the car manually, which is time consuming and laborious, and can dirty the hands and so on.

本創作係提供一種可使自行車落鏈時自動導回齒盤結構，包括一曲柄、一齒盤、一擋塊及一導引塊。其中，該曲柄係一端的外側面結合有一踏板。該齒盤係結合固定在該曲柄另一端之內側面上可被該曲柄驅動旋轉，該齒盤上繞設有一鏈條。該擋塊係設於該曲柄的另一端，使該擋塊與該齒盤之間形成位於該曲柄另一端之周面上之一槽溝，該槽溝可供在落鏈時將該鏈條擋在該曲柄的另一端上。該導引塊係設於該曲柄中央處的內側面上，其之下部與該齒盤之間維持可供該鏈條之一側鏈片通過之間隙，上部則高於該齒盤之外周面且具有一導引弧面，當該導引塊隨著該曲柄被向上帶動到一適當高度時，該鏈條則可被提拉到該齒盤的上側然後順著該導引弧面向下滑落而卡設於該齒盤的鏈齒上以形成自動上鏈之狀態。 The present invention provides an automatic guide tooth return structure for the bicycle to be chained, including a crank, a toothed disc, a stopper and a guiding block. Wherein, the outer side of one end of the crank is combined with a pedal. The sprocket is coupled to the inner side of the other end of the crank to be rotatable by the crank, and a chain is wound around the sprocket. The block is disposed at the other end of the crank such that a groove is formed between the block and the toothed disc on a circumferential surface of the other end of the crank, and the groove is adapted to block the chain when the chain is dropped On the other end of the crank. The guiding block is disposed on the inner side surface at the center of the crank, and a gap between the lower portion and the toothed disc is maintained for the side chain of the chain, and the upper portion is higher than the outer peripheral surface of the toothed disc and Having a guiding curved surface, when the guiding block is driven upward to a suitable height, the chain can be pulled to the upper side of the toothed disc and then slide down along the guiding arc It is disposed on the fastener elements of the toothed disc to form an automatic winding state.

本創作所提供之可使自行車落鏈時自動導回齒盤結構，係在發生落鏈之狀況時，可藉由該擋塊擋住該鏈條，然後繼續踩動踏板使該導引塊將該鏈條向上提拉到該齒盤的上方，使該鏈條順著該導引弧面向下滑落而自動上鏈，如此便可避免發生落鏈時突然減速或停止所造成之追撞等危險，而且更是無需下車手動上鏈，而可大幅提高騎行之便利性，特別是在比賽時更是可因此節省大量的上鏈時間，而可提昇比賽成績。 The present invention provides an automatic guiding and returning gear structure when the bicycle is dropped, and the chain can be blocked by the stopper when the chain is broken, and then the pedal is continuously depressed to make the guiding block to the chain. Pulling up to the top of the toothed disc, the chain is automatically slid down along the guiding arc, so that the danger of collision or sudden collision caused by sudden deceleration can be avoided, and There is no need to get off the manual winding, but it can greatly improve the convenience of riding, especially in the game, it can save a lot of winding time and improve the performance.

10‧‧‧曲柄 10‧‧‧ crank

11‧‧‧踏板 11‧‧‧ pedal

12‧‧‧螺孔 12‧‧‧ screw holes

13‧‧‧固定爪 13‧‧‧Fixed claws

20‧‧‧齒盤 20‧‧‧ toothed disc

21‧‧‧齒盤螺栓 21‧‧‧ring bolt

22‧‧‧鏈條 22‧‧‧Chapter

30‧‧‧擋塊 30‧‧‧blocks

31‧‧‧擋塊螺栓 31‧‧‧Block bolts

32‧‧‧槽溝 32‧‧‧ trench

33‧‧‧導斜面 33‧‧‧Bevel

40‧‧‧導引塊 40‧‧‧Guiding block

41‧‧‧導引塊螺栓 41‧‧‧ Guide block bolts

42‧‧‧導引弧面 42‧‧‧ Guided arc

第1圖係本創作第一實施例之立體分解示意圖。 Figure 1 is a perspective exploded view of the first embodiment of the present creation.

第2圖係本創作第一實施例之立體組合示意圖。 Figure 2 is a perspective view of the first embodiment of the present invention.

第3圖係本創作第一實施例後側之立體組合示意圖。 Fig. 3 is a perspective view showing the three-dimensional combination of the rear side of the first embodiment of the present invention.

第4圖係本創作第一實施例落鏈時之前視動作示意圖。 Fig. 4 is a schematic view showing the front view of the first embodiment of the present invention when it is dropped.

第5圖係第4圖之俯視示意圖。 Figure 5 is a top plan view of Figure 4.

第6圖係本創作第一實施例之自動上鏈之前視動作示意圖。 Fig. 6 is a schematic view showing the front view of the self-winding of the first embodiment of the present invention.

第7圖係第6圖之右視示意圖。 Figure 7 is a right side view of Figure 6.

第8圖係本創作之第二實施例。 Figure 8 is a second embodiment of the present invention.

第9圖係本創作之第三實施例。 Figure 9 is a third embodiment of the present creation.

第10圖係本創作之第四實施例的立體分解示意圖。 Figure 10 is a perspective exploded view of a fourth embodiment of the present invention.

第11圖係本創作之第四實施例的立體組合示意圖。 Figure 11 is a perspective assembled view of a fourth embodiment of the present invention.

第12圖係本創作之第五實施例。 Figure 12 is a fifth embodiment of the present creation.

請參閱第1~7圖所示，係為本創作所述之可使自行車落鏈時自動導回齒盤結構的第一實施例，在第1~5圖中係顯示本實施例之可使自行車落鏈時自動導回齒盤結構包括一曲柄10、一齒盤20、一擋塊30及一導引塊40。其中：該曲柄10，係一端的外側面結合有一踏板11。 Please refer to the first embodiment of FIG. 1 to FIG. 7 , which is the first embodiment of the structure of the automatic guide toothed disc when the bicycle is dropped, and the first embodiment shows the embodiment. The automatic guide toothed disc structure when the bicycle is dropped includes a crank 10, a toothed disc 20, a stopper 30 and a guiding block 40. Wherein: the crank 10 is connected to a pedal 11 on the outer side of one end.

該齒盤20，係利用複數齒盤螺栓21將其結合固定在該曲柄10另一端之內側面上，使可供被該曲柄10驅動旋轉，於該齒盤20上並繞設有一鏈條22。 The toothed disc 20 is fixedly coupled to the inner side of the other end of the crank 10 by a plurality of sprocket bolts 21 so as to be rotatable by the crank 10, A chain 22 is wound around the chainring 20.

該擋塊30，係利用複數擋塊螺栓31將其螺鎖固定在該曲柄10的另一端，使該擋塊30與該齒盤20之間形成位於該曲柄10另一端之周面上之一槽溝32，該槽溝32係可供在落鏈時將該鏈條22擋在該曲柄10的另一端上，以防止該鏈條22掉到該曲柄10的外側面。該擋塊30的周面係形成有由外向內逐漸低斜之一導斜面33，使可更進一步提昇阻擋該鏈條22之效果。在本創作中，該槽溝32亦可直接設於該擋塊30之周面上，而此乃上述結構之簡單變化，此不再另加以贅述。 The stopper 30 is screwed to the other end of the crank 10 by a plurality of stopper bolts 31, so that the stopper 30 and the chainring 20 are formed on one of the circumferential faces of the other end of the crank 10. The groove 32 is adapted to block the chain 22 on the other end of the crank 10 when the chain is dropped to prevent the chain 22 from falling to the outer side of the crank 10. The circumferential surface of the stopper 30 is formed with a guide bevel 33 which is gradually lowered from the outside to the inside, so that the effect of blocking the chain 22 can be further enhanced. In the present invention, the groove 32 can also be directly disposed on the circumferential surface of the stopper 30, which is a simple change of the above structure, which will not be further described.

該導引塊40，係利用複數導引塊螺栓41將其螺鎖固定在該曲柄10中央處的內側面上，其之下部與該齒盤20之間維持可供該鏈條22之一側鏈片通過之間隙，上部則高於該齒盤20之外周面，且具有一導引弧面42，該導引弧面42之弧面係由前向後逐漸減小，當該導引塊40被該曲柄10向上帶動到一高度時，該鏈條22係會被提拉到該齒盤20的上側然後順著該導引弧面42向下滑落而卡設於該齒盤20的鏈齒上而形成上鏈之狀態。 The guiding block 40 is screwed to the inner side surface of the crank 10 by a plurality of guiding block bolts 41, and a side chain of the chain 22 is maintained between the lower portion and the chainring 20. The gap through which the sheet passes is higher than the outer peripheral surface of the sprocket 20, and has a guiding curved surface 42. The curved surface of the guiding curved surface 42 gradually decreases from front to back, when the guiding block 40 is When the crank 10 is driven up to a height, the chain 22 is pulled up to the upper side of the sprocket 20 and then slid down along the guiding curved surface 42 to be caught on the sprocket of the sprocket 20 Forming the state of the upper chain.

在第4、5圖中係指出，當自行車落鏈時，該鏈條22係會被擋在該擋塊30與該齒盤20之間所形成之槽溝32之中。 It is noted in Figures 4 and 5 that the chain 22 is retained in the slot 32 formed between the stop 30 and the chainring 20 when the bicycle is dropped.

在第6、7圖中係顯示，當在落鏈時繼續踩動另一側曲柄10上之踏板11而使該曲柄10順時針旋轉時，則結合於該曲柄10內側之導引塊40便會隨著該曲柄10的旋轉而向上位移，進而將該鏈條22向上提拉到該齒盤20的上方，使該鏈條22順著該導引弧面42向下滑落而卡設於該齒盤20的鏈齒上而形成自動上鏈之狀態。 In Figures 6 and 7, it is shown that when the pedal 11 on the other side crank 10 is continuously stepped on when the chain is dropped to rotate the crank 10 clockwise, the guiding block 40 coupled to the inner side of the crank 10 is Will move upward with the rotation of the crank 10, and then lift the chain 22 upwards to the upper of the toothed disc 20, so that the chain 22 follows the guiding arc. The surface 42 slides down and is caught on the fastener elements of the chainring 20 to form an automatic winding state.

本創作所提供之可使自行車落鏈時自動導回齒盤結構，係在發生落鏈之狀況時，可先藉由該擋塊30擋住該鏈條22，然後利用繼續踩動踏板11使該導引塊40將該鏈條22向上提拉到該齒盤20的上方，使該鏈條22順著該導引弧面42向下滑落而自動上鏈，如此便可避免發生落鏈時突然減速或停止所造成之追撞等危險，而且更是無需下車手動上鏈，而可大幅提高騎行之便利性，特別是在比賽時更是可因此節省大量的上鏈時間，而可提昇比賽成績。 The present invention provides a structure for automatically guiding the toothed disc when the bicycle is dropped. When the chain is in a chain condition, the chain 22 can be blocked by the stopper 30, and then the pedal 11 is used to continue the pedaling. The lead block 40 lifts the chain 22 upwards to the upper portion of the chainring 20, and the chain 22 is automatically slid down along the guiding curved surface 42 to avoid sudden deceleration or stoppage when the chain is dropped. The danger caused by the collision, and the need to manually get off the car, but can greatly improve the convenience of riding, especially in the game can save a lot of winding time, and can improve the game results.

請參閱第8圖所示，係為本創作所述之可使自行車落鏈時自動導回齒盤結構之第二實施例，其之結構與第一實施例大致相同，差別僅在於本實施例之曲柄10上係間隔設置有複數螺孔12，可供該複數導引塊螺栓41可選擇的螺設，以使該導引塊41可配合不同尺寸規格之齒盤20而結合於曲柄10相對應之適當位置處。 Please refer to FIG. 8 , which is a second embodiment of the structure of the automatic sprocket wheel for the bicycle to be chained as described in the present invention, and the structure thereof is substantially the same as that of the first embodiment, and the difference lies only in the embodiment. The plurality of screw holes 12 are disposed on the crank 10 at intervals, and the plurality of lead bolts 41 can be selectively screwed so that the guiding block 41 can be coupled to the crankshaft 20 of different sizes to be coupled to the crank 10 phase. Corresponding to the appropriate location.

請參閱第9圖所示，係為本創作所述之可使自行車落鏈時自動導回齒盤結構之第三實施例，其之結構與第一實施例大致相同，差別僅在於本實施例之該擋塊30及該導引塊40係一體成型於該曲柄10上。當然在本實施例中，該擋塊30及該導引塊40亦可僅其中任一者一體成型於該曲柄10上，此不再另外加以贅述。 Please refer to FIG. 9 , which is a third embodiment of the structure of the automatic sprocket wheel when the bicycle is dropped, and the structure thereof is substantially the same as that of the first embodiment, and the difference lies only in the embodiment. The stopper 30 and the guiding block 40 are integrally formed on the crank 10. Of course, in the embodiment, the stopper 30 and the guiding block 40 may be integrally formed on the crank 10, which will not be further described.

請參閱第10、11圖所示，係為本創作所述之可使自行車落鏈時自動導回齒盤結構之第四實施例，其之結構與第一實施例大致相同，差別僅在於本實施例之曲柄10的另一端係延伸出複數固定爪13可供與該齒盤20結合，該擋塊30係呈C形之環片狀，且利用該複數擋塊螺栓31將其螺鎖在該複數固定爪13上，並使該擋塊30的周邊凸伸出該複數固定爪13的端面，進而使該擋塊30與該齒盤20之間形成位於該複數固定爪13端面上之複數槽溝32，可供在落鏈時將該鏈條22擋在該曲柄10的另一端的複數固定爪13上。 Please refer to Figures 10 and 11 for the description of this creation. The fourth embodiment of the automatic guide toothed disc structure when driving the chain is substantially the same as that of the first embodiment, except that the other end of the crank 10 of the embodiment extends out of the plurality of fixing claws 13 for The toothed disc 20 is coupled, and the stopper 30 is in the shape of a C-shaped ring, and is screwed to the plurality of fixed claws 13 by the plurality of stopper bolts 31, and the periphery of the stopper 30 is protruded from the periphery. The end faces of the plurality of fixing claws 13 further form a plurality of grooves 32 on the end faces of the plurality of fixing claws 13 between the stoppers 30 and the spurs 20, so that the chain 22 can be blocked by the chain 10 when the chain is dropped. The other end of the plurality of fixed claws 13 is attached.

請參閱第12圖所示，係為本創作所述之可使自行車落鏈時自動導回齒盤結構之第五實施例，其之結構與第一實施例大致相同，差別僅在於本實施例之曲柄10的另一端係延伸出複數固定爪13可供與該齒盤20結合，該複數固定爪13的端部係分別一體凸設有複數擋塊30，該複數擋塊30的端部係凸伸出該複數固定爪13的端面，使該擋塊30與該齒盤20之間形成位於該複數固定爪13端面上之複數槽溝32，可供在落鏈時將該鏈條22擋在該曲柄10的另一端的複數固定爪13。 Please refer to FIG. 12 , which is a fifth embodiment of the structure of the automatic guide toothed disc when the bicycle is dropped in the present invention, and the structure thereof is substantially the same as that of the first embodiment, and the difference lies only in the embodiment. The other end of the crank 10 extends out of the plurality of fixing claws 13 for coupling with the toothed disc 20, and the ends of the plurality of fixing claws 13 are integrally convexly provided with a plurality of stoppers 30, and the ends of the plurality of retaining blocks 30 are Projecting an end surface of the plurality of fixing claws 13 to form a plurality of grooves 32 on the end surface of the plurality of fixing claws 13 between the stopper 30 and the toothed disc 20, so as to block the chain 22 when the chain is dropped The other end of the crank 10 has a plurality of fixed claws 13.

綜上所述，由於本創作具有上述優點及實用價值，而且在同類產品中均未見有類似之產品發表，故已符合新型專利之申請要件，乃爰依法提出申請。 In summary, since this creation has the above advantages and practical value, and there is no similar product publication in similar products, it has already met the application requirements of the new patent, and is filed according to law.

Claims

一種可使自行車落鏈時自動導回齒盤結構，包括：一曲柄，係一端的外側面結合有一踏板；一齒盤，係結合固定在該曲柄另一端之內側面上可被該曲柄驅動旋轉，該齒盤上繞設有一鏈條；一擋塊，係設於該曲柄的另一端，使該擋塊與該齒盤之間形成位於該曲柄另一端之周面上之一槽溝，該槽溝可供在落鏈時將該鏈條擋在該曲柄的另一端上；以及一導引塊，係設於該曲柄中央處的內側面上，其之下部與該齒盤之間維持可供該鏈條之一側鏈片通過之間隙，上部則高於該齒盤之外周面且具有一導引弧面，當該導引塊隨著該曲柄被向上帶動到一適當高度時，係可將該鏈條提拉到該齒盤的上側，然後使該鏈條順著該導引弧面向下滑落而卡設於該齒盤的鏈齒上而形成自動上鏈之狀態。 The utility model relates to an automatic guide toothed disc structure for causing a bicycle to be chained, comprising: a crank, the outer side of one end is coupled with a pedal; a toothed disc is fixedly coupled to the inner side of the other end of the crank and can be driven to rotate by the crank. a chain is arranged on the toothed disc; a stopper is disposed at the other end of the crank, so that a groove is formed between the stopper and the toothed disc on a circumferential surface of the other end of the crank, the slot The groove is adapted to block the chain on the other end of the crank when the chain is dropped; and a guiding block is disposed on the inner side surface at the center of the crank, and the lower portion and the toothed disc are maintained for the a side chain of one of the chains passes through the gap, the upper portion is higher than the outer circumferential surface of the toothed disc and has a guiding curved surface, and when the guiding block is driven upward to a suitable height with the crank, the The chain is pulled to the upper side of the toothed disc, and then the chain is slid down along the guiding arc and is engaged on the fastener elements of the toothed disc to form an automatic winding state.

如請求項1所述之可使自行車落鏈時自動導回齒盤結構，其中該齒盤係利用複數齒盤螺栓將其結合固定在該曲柄上。 The automatic sprocket wheel structure is configured to cause the bicycle to be chained as described in claim 1, wherein the sprocket is fixed to the crank by a plurality of sprocket bolts.

如請求項1所述之可使自行車落鏈時自動導回齒盤結構，其中該擋塊的周面形成有由外向內逐漸低斜之一導斜面，使可更進一步提昇擋鏈效果。 As described in claim 1, the bicycle can be automatically guided back to the chain structure when the bicycle is dropped. The circumferential surface of the block is formed with a guiding slope which is gradually lowered from the outside to the inside, so that the chain blocking effect can be further improved.

如請求項1所述之可使自行車落鏈時自動導回齒盤結構，其中該擋塊係一體成型於該曲柄上。 The automatic sprocket wheel structure is configured to cause the bicycle to be chained as described in claim 1, wherein the stopper is integrally formed on the crank.

如請求項1或4所述之可使自行車落鏈時自動導回齒盤結構，其中該導引塊係一體成型於該曲柄上。 The automatic sprocket wheel structure is configured to cause the bicycle to be chained as described in claim 1 or 4, wherein the guiding block is integrally formed on the crank.

如請求項1所述之可使自行車落鏈時自動導回齒盤結構，其中該擋塊係利用複數擋塊螺栓將其螺鎖固定在該曲柄上。 As described in claim 1, the bicycle can be automatically guided back to the chain structure when it is dropped, wherein The stop is screwed to the crank by a plurality of stop bolts.

如請求項6所述之可使自行車落鏈時自動導回齒盤結構，其中該曲柄之另一端係延伸出複數固定爪可供與該齒盤結合，該擋塊係呈C形之環片狀，且利用該複數擋塊螺栓將其螺鎖在該複數固定爪上，使該擋塊的周邊凸伸出該複數固定爪的端面，進而使該擋塊與該齒盤之間形成位於該複數固定爪端面上之複數槽溝，可供在落鏈時將該鏈條擋在該曲柄的另一端的複數固定爪上。 The automatic sprocket wheel structure can be configured as described in claim 6, wherein the other end of the crank extends out of the plurality of fixed claws for engaging with the sprocket, and the stop is a C-shaped ring piece. And the plurality of stopper bolts are screwed on the plurality of fixing claws, so that the periphery of the stopper protrudes from the end surface of the plurality of fixing claws, thereby forming a space between the stopper and the chainring A plurality of grooves on the end faces of the plurality of claws are provided for blocking the chain on the plurality of fixed claws at the other end of the crank when the chain is dropped.

如請求項1所述之可使自行車落鏈時自動導回齒盤結構，其中該導引塊係利用複數導引塊螺栓將其螺鎖固定在該曲柄上。 The automatic sprocket wheel structure is configured to cause the bicycle to be chained as described in claim 1, wherein the guiding block is screwed to the crank by a plurality of guiding block bolts.

如請求項8所述之可使自行車落鏈時自動導回齒盤結構，其中該曲柄上係間隔設置有複數螺孔，該複數螺孔可供該複數導引塊螺栓可選擇的螺設，以使該導引塊可配合不同尺寸規格之齒盤而結合於曲柄相對應之適當位置處。 The automatic sprocket wheel structure can be arranged when the bicycle is in the chain as described in claim 8, wherein the crank is provided with a plurality of screw holes at intervals, and the plurality of screw holes are provided for the optional screw of the plurality of guiding block bolts. In order to make the guiding block fit to the different sizes of the toothed disc, it is combined with the corresponding position of the crank.

如請求項1所述之可使自行車落鏈時自動導回齒盤結構，其中該導引弧面之弧面係由前向後逐漸減小。 As described in claim 1, the bicycle can be automatically guided back to the chain structure when the bicycle is dropped, wherein the curved surface of the guiding curved surface gradually decreases from front to back.

一種可使自行車落鏈時自動導回齒盤結構，包括：一曲柄，係一端的外側面結合有一踏板，另一端係延伸出複數固定爪；一齒盤，係結合固定在該複數固定夾爪上可被該曲柄驅動旋轉，該齒盤上繞設有一鏈條；複數擋塊，係一體凸設於該複數固定夾爪的端部，且該複數擋塊的端部係凸伸出該複數固定爪的端面，使該擋塊與該齒盤之間形成有位於該複數固定爪端面上之複數槽溝，可供在落鏈時將該鏈條擋在該曲柄另一端的複數固定爪上；以及一導引塊，係設於該曲柄中央處的內側面上，其之下部與該齒盤之間維持可供該鏈條之一側鏈片通過之間隙，上部則高於該齒盤之外周面且具有一導引弧面，當該導引塊隨著該曲柄被向上帶動到一適當高度時，係可將該鏈條提拉到該齒盤的上側，然後使該鏈條順著該導引弧面向下滑落而卡設於該齒盤的鏈齒上而形成自動上鏈之狀態。 The utility model relates to an automatic guiding and returning toothed disc structure for the bicycle to be chained, comprising: a crank, the outer side of one end is combined with a pedal, and the other end is extended with a plurality of fixed claws; a toothed disc is fixedly fixed to the plurality of fixed clamping jaws The upper portion of the plurality of fixed jaws is integrally protruded from the end of the plurality of fixed jaws, and the ends of the plurality of blocks are convexly protruded from the plurality of fixed ends. An end surface of the claw is formed between the stopper and the toothed disc, and a plurality of grooves are formed on the end surface of the plurality of fixing claws. Providing the chain to block the plurality of fixed claws at the other end of the crank when the chain is dropped; and a guiding block is disposed on the inner side surface at the center of the crank, and the lower portion is maintained between the lower portion and the toothed disc a side chain of one of the chains passes through the gap, the upper portion is higher than the outer circumferential surface of the toothed disc and has a guiding curved surface, and when the guiding block is driven upward to a suitable height with the crank, The chain is pulled to the upper side of the toothed disc, and then the chain is slid down along the guiding arc and is engaged on the fastener elements of the toothed disc to form an automatic winding state.