CN2915655Y - Traveling Angle Limiting Device of Bicycle - Google Patents

Abstract

A travel angle limiting device of a bicycle comprises a head pipe unit, a front fork pipe unit and a fixing piece, wherein the front fork pipe unit can rotate around a rotation axis, the head pipe unit comprises a head pipe and a fixing block, the fixing block extends outwards from the head pipe in the radial direction, the fixing block is provided with a fixing groove hole, the front fork pipe unit comprises a front fork pipe and a rotating block, the front fork pipe can rotate, the rotating block extends outwards from the front fork pipe in the radial direction, the front fork pipe penetrates through the head pipe, the rotating block is provided with a rotating groove hole, the fixing groove hole and the rotating groove hole are both located on a first imaginary arc surface, the fixing piece can penetrate through at least one of the fixing groove hole and the rotating groove hole in a removable mode, and the fixing piece is matched with the fixing groove hole and the rotating groove hole to limit the rotation angle of the front fork pipe unit so as to limit the travel angle of the bicycle.

Description

Traveling Angle Limiting Device of Bicycle

【Technical field】

The utility model relates to a limiting device, in particular to a traveling angle limiting device of a bicycle.

【Background technique】

Referring to FIGS. 1 and 2 , a conventional bicycle 1 includes a body 11 , a front wheel 12 , a handle 13 , a rear wheel 14 disposed on the body 11 , and a steering device 15 . The steering device 15 includes a head pipe unit 151 disposed on the vehicle body 11 , and a front fork pipe unit 152 connected to the handlebar 13 and the front wheel 12 and rotatably disposed in the head pipe unit 151 . When riding the bicycle 1, the user needs to hold the handlebar 13 to drive the front fork tube unit 152 and the front wheel 12, so as to steer at an included angle B along the straight travel direction. But when using for special purpose (as people with limited mobility, patients with cerebral palsy, young children etc.), this steering device 15 still has the following deficiencies:

1. When the user is riding, he cannot properly control the handlebar 13 , and the steering angle B may be too large and the user may lose control and cause danger, resulting in a lack of safety.

2. If the bicycle 1 is used for rehabilitation, if necessary, it needs to be ridden along a predetermined fixed route, and it will be necessary to fix the front fork tube unit 152 and the head tube unit 151 with a rope or wire, resulting in a lack of inconvenient positioning .

【Content of utility model】

The purpose of the utility model is to provide a bicycle traveling angle limiting device with high safety and convenient positioning.

In order to achieve the above object, the utility model provides a bicycle travel angle limiting device, which is installed on a bicycle, and the bicycle has a body, a front wheel, a handle, and a rear wheel arranged on the body. The travel angle limiting device includes a head tube unit arranged at the end of the vehicle body opposite to the rear wheel, a front fork tube unit that can rotate around a rotation axis and connect the handlebar and the front wheel, and is characterized in that: the head The tube unit includes a head tube, and a fixed block extending radially outward from an outer peripheral surface of the head tube. The fixed block has a fixing slot. The front fork tube unit includes a front fork that can rotate around the rotation axis. a fork tube, and a rotating block extending radially outward from an outer peripheral surface of the front fork tube, the front fork tube is passed through the head tube, the rotating block has a rotating slot, and the fixing slot The rotation slots are all located on a first imaginary arc surface defined by the rotation axis as the axis, and the travel angle limiting device of the bicycle also includes a fixing piece, which can be removably passed through the fixing piece. At least one of the slot and the rotating slot.

The traveling angle limiting device for a bicycle is characterized in that: the fixing and rotating slots are both in the shape of circular perforations, the diameter of the rotating slot is larger than that of the fixing slot, and a A first end and a second end of the fixed part are passed through the fixing slot, and the first and second ends contact the fixed part with the rotation of the front fork tube unit to limit the rotation of the front fork tube unit to a specific angle .

The traveling angle limiting device for a bicycle is characterized in that: the rotating slot is in the shape of an arc slot extending along the first imaginary arc surface, and has a first One end and a second end, the fixing slot is in the shape of a circular perforation and is located between the first and second ends, the fixing member is passed through the fixing slot, and the first and second ends follow the front fork tube The unit rotates against the fixing member to limit the rotation of the front fork tube unit to a specific angle.

The traveling angle limiting device of the bicycle is characterized in that: the fixed block of the head pipe unit and the rotating block of the front fork pipe unit are both formed into a flat plate shape, and the fixing and rotating slots are both in the shape of circular perforations. The aperture of the fixing slot is larger than that of the rotating slot, and has a first end and a second end located in the direction of the first imaginary arc surface. The fixing piece is passed through the rotating slot. The front fork tube unit rotates against the first and second ends to limit the rotation of the front fork tube unit to a specific angle.

The traveling angle limiting device of the bicycle is characterized in that: the fixed block of the head tube unit and the rotating block of the front fork tube unit are both formed into a flat plate shape, and the fixing slot is formed along the first imaginary arc surface The arc-shaped slot extending in the direction has a first end and a second end located in the direction of the first imaginary arc surface. The rotating slot is in the shape of a circular perforation and is located between the first and second ends. , the fixing piece is passed through the rotation slot, and the fixing piece abuts against the first and second ends as the front fork tube unit rotates to limit the rotation of the front fork tube unit to a specific angle.

The traveling angle limiting device of the bicycle is characterized in that: the fixed block of the head tube unit and the rotating block of the front fork tube unit are both formed into a flat plate shape, the fixed part is a bolt element, and the fixed block also has Two fixed positioning through holes spaced apart from the fixed slot, the fixed slot and the rotating slot are substantially equal in diameter and width to the fixed positioning through hole, and they are all arranged along the first imaginary arc surface. The rotation slot is passed through one of the fixing slot and the fixing positioning hole at the same time, so as to fix the front fork tube unit at a specific angle.

The travel angle limiting device of the bicycle is characterized in that: the rotation slot of the rotation block is formed on a top surface of the rotation block and extends downward to a bottom surface, and the rotation slot has a hole adjacent to the top of the rotation block. The arc-shaped groove portion on the surface, and a plurality of positioning holes adjacent to the bottom surface of the rotating block, the arc-shaped groove portion extends along the direction of the first imaginary arc surface, and has a first imaginary arc surface located in the direction of the first imaginary arc surface end and a second end, the positioning holes extend downward from the bottom end of the arc groove to the bottom surface of the rotating block, and are equiangularly distributed along the first imaginary arc surface at intervals from each other, and are connected with the fixing groove The aperture widths are substantially equal in size. The fixing member is passed through the fixing slot and positioned between a first position and a second position relative to the head tube unit. When the fixing member is located at the first position, the fixing member A bottom end of the part is located in the arc-shaped groove of the rotation slot, and the first and second ends can be rotated with the front fork tube unit to resist the fixing part to limit the rotation angle of the front fork tube unit. When the fixing part is in the In the second position, the bottom end of the fixing member passes through one of the positioning holes to fix the front fork tube unit at a specific angle.

The travel angle limiting device of the bicycle is characterized in that: the fixed block of the head tube unit also has an outer peripheral surface and an inner peripheral surface connecting the top and bottom surfaces of the fixed block, and a ring formed on the outer peripheral surface. And extend radially inwards to the clamping groove of the inner peripheral surface, the inner peripheral surface defines the fixing slot, the clamping groove communicates with the fixing slot, the fixing member has a shaft, a The pull ring of the shaft, and a clamping head arranged on the shaft at a distance from the pull ring, when the fixing member is at the first position, the clamping head is constantly stretched in the clamping groove, and when the fixing When the part is in the second position, the clamping head is elastically stretched below the fixed block, and the pull ring is against the top surface of the fixed block.

The beneficial effect of the utility model is that the cooperation between the fixing member and the fixing and rotating slot can limit the rotation angle of the front fork tube unit, and further limit the traveling angle of the bicycle.

【Description of drawings】

Fig. 1 is a side view illustrating a conventional bicycle;

Figure 2 is a top partial sectional view illustrating a steering device of the bicycle;

Fig. 3 is a side view, illustrating the situation that a first preferred embodiment of the travel angle limiting device of the bicycle of the present invention is installed on the bicycle;

Fig. 4 is a perspective view of the first preferred embodiment, illustrating that a front fork tube unit is passed through a head tube unit;

Fig. 5 is a top sectional view of the first preferred embodiment, illustrating that a first end of a rotating slot interferes with a fixing member;

Figure 6 is a side view of the first preferred embodiment, illustrating the fixture;

Fig. 7 is a view similar to Fig. 5, illustrating that a second end of the rotating slot is in contact with the fixing member;

Fig. 8 is a view similar to Fig. 7, illustrating that the fixing member is passed through a fixed positioning perforation, so that the bicycle can move forward in a straight line;

Fig. 9 is a view similar to Fig. 8, illustrating that the fixing member is passed through another fixing positioning hole, so that the bicycle can continue to move forward to the left;

Fig. 10 is a view similar to Fig. 9, illustrating that the fixing member is passed through another fixed positioning hole, so that the bicycle can continue to advance to the right;

Fig. 11 is a top sectional view illustrating a second preferred embodiment of the travel angle limiting device of the bicycle of the present invention;

Fig. 12 is a top sectional view illustrating a third preferred embodiment of the travel angle limiting device of the bicycle of the present invention;

Fig. 13 is a top sectional view illustrating a fourth preferred embodiment of the travel angle limiting device of the bicycle of the present invention;

Fig. 14 is a top sectional view illustrating a fifth preferred embodiment of the travel angle limiting device of the bicycle of the present invention;

Fig. 15 is a side view illustrating a sixth preferred embodiment of the travel angle limiting device of the bicycle of the present invention;

Fig. 16 is a front partial sectional view of the sixth preferred embodiment, illustrating a fixing member in a first position;

Figure 17 is a side view of the sixth preferred embodiment, illustrating a first imaginary arc; and

Figure 18 is a view similar to Figure 16, illustrating the fixing member in a second position.

【Detailed ways】

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail:

Referring to Fig. 3, the first preferred embodiment of the traveling angle limiting device of the bicycle of the present invention is installed on a bicycle 2, and this bicycle 2 has a vehicle body 21, a front wheel 22, a handle 23, and a 21 of the rear wheels 24 .

The travel angle limiting device of the bicycle comprises a head pipe unit 3 arranged at the end of the vehicle body 21 opposite to the rear wheel 24, a front fork that can rotate around a rotation axis Y and connect the handlebar 23 and the front wheel 22 Tube unit 4, and a fixing piece 5.

4, the head pipe unit 3 includes a head pipe 31, and a fixing block 32 extending radially outward from an outer peripheral surface of the head pipe 31, the fixing block 32 has a fixing slot 321, and a spacer The fixing and positioning through holes 322 of the fixing slots 321 .

The front fork tube unit 4 includes a front fork tube 41 and a rotating block 42 extending radially outward from an outer peripheral surface of the front fork tube 41 . Both the fixed block 32 and the rotating block 42 are flat plate-shaped, the rotating block 42 has a rotating slot 421, and three rotation positioning through holes 422 spaced apart from the rotating slot 421, the rotating slot 421 has a first end 423 and a second end 424 .

4 and 5, the front fork tube 41 is rotatably passed through the head tube 31 around the rotation axis Y, defines a first imaginary arc surface A1 defined by the rotation axis Y as the axis, and - a second imaginary arc surface A2. The rotating slot 421 is in the shape of an arc slot extending along the first imaginary arc surface A1, the first and second ends 423, 424 are located in the direction of the first imaginary arc surface A1, and the fixing slot 321 is in the shape of an arc slot. The circular perforation is located between the first and second ends 423 , 424 . The rotation positioning perforation 422 and the fixed positioning perforation 322 are both arranged along the second imaginary arc surface A2 .

Referring to FIG. 6 , the fixing member 5 is a conventional plug element, which is not the focus of the present utility model, and its structure and function will not be described in detail here.

Referring to Fig. 3, Fig. 5 and Fig. 7, the user can pass the fixing part 5 in the fixing slot 321, and the first and second ends 423, 424 of the rotation slot 421 can follow the front fork tube unit 4 Rotate against the fixing member 5 to limit the rotation angle C of the front fork tube unit 4 , thereby limiting the travel angle of the bicycle 2 .

Referring to FIG. 3 and FIG. 8 , the user can take out the fixing member 5 from the fixing slot 321 , insert it into the fixing positioning through hole 322 , and pass through one of the rotation positioning through holes 422 at the same time. The front fork tube unit 4 can be fixed with the head tube unit 3 so that the bicycle 2 advances in a straight line (as shown in FIG. 8 ), and can also be clamped with the head tube unit 3 at a certain angle C to make the bicycle 2 continue to move to the left ( As shown in FIG. 9 ), or reversely clip a certain angle C to make the bicycle 2 continue to move to the right (as shown in FIG. 10 ).

When used for special purposes (such as people with limited mobility, patients with cerebral palsy, young children, etc.), the travel angle limiting device of the utility model bicycle can not only turn, but also has the following effects:

1. When the fixing member 5 is arranged in the fixing slot 321, the steering angle of the front fork tube unit 4 is limited. Even if the user cannot control the handlebar 23 properly when riding, the riding will still not be possible. The problem that the steering angle is too large occurs, thereby achieving the effect of higher safety.

2. If a user needs to ride along a pre-determined fixed route for rehabilitation purposes, the front fork can be fixed by passing the fixing part 5 in the required fixing and rotating positioning perforations 322 and 422 The pipe unit 4 and the head pipe unit 3 are turned at a specific angle C, so that the positioning is convenient.

Referring to Fig. 11, the second preferred embodiment of the travel angle limiting device of the bicycle of the present invention is roughly the same as the first preferred embodiment, the difference is that the fixing and rotating slots 321, 421 are all circular Perforated, the rotating slot 421 has a larger diameter than the fixing slot 321 , and has a first end 423 and a second end 424 located in the direction of the first imaginary arc surface A1. The fixing member 5 is passed through the fixing slot 321 , and the first and second ends 423 , 424 can contact the fixing member 5 with the rotation of the front fork tube unit 4 to limit the rotation angle C of the front fork tube unit 4 . In this way, the effects described in the first preferred embodiment can also be achieved.

Referring to Fig. 12, the third preferred embodiment of the travel angle limiting device of the bicycle of the present invention is roughly the same as the first preferred embodiment, except that the fixed block 32 has a fixed slot 321, and three A fixed positioning through hole 322 is spaced from the fixed slot 321 . The fixed slot 321 has a first end 323 and a second end 324 . The rotation block 42 has a rotation slot 421 and a rotation positioning through hole 422 separated from the rotation slot 421 .

The fixing slot 321 is in the shape of an arc slot extending along the first imaginary arc surface A1, and the first end 323 and the second end 324 of the fixing slot 321 are located in the direction of the first imaginary arc surface A1. The rotation slot 421 is in the shape of a circular perforation and is located between the first and second ends 323, 324. The fixing member 5 passes through the rotation slot 421, and can rotate with the front fork tube unit 4 to resist the The first and second ends 323 , 324 are rotated by a specific angle C to define the front fork tube unit 4 . Both the rotation positioning hole 422 and the fixed positioning hole 322 are arranged along the second imaginary arc surface A2, and the fixing member 5 can also be passed through the rotation positioning hole 422 and the fixed positioning hole 322 to fix the The front fork tube unit 4 is at a specific angle C. In addition, if the shape of the fixing slot 321 in this preferred embodiment is changed to a circular perforation shape (not shown) with a diameter larger than that of the rotating slot 421, the same can also be achieved as described in the first preferred embodiment. effect.

Referring to Fig. 13, the fourth preferred embodiment of the travel angle limiting device of the bicycle of the present invention is roughly the same as the first preferred embodiment, the difference is that the fixed block 32 has a fixed slot 321, the rotation The block 42 has a rotation through slot 421 and two rotation positioning through holes 422 spaced apart from the rotation slot 421 . The fixed slot 321 , the rotation slot 421 and the rotation positioning through hole 422 are substantially equal in diameter and width, and are all arranged along the first imaginary arc surface A1 . The fixing member 5 is threaded in the fixing slot 321, and at the same time is threaded in one of the rotation slot 421 and the rotation positioning hole 422, so as to fix the front fork tube unit 4 at a specific angle C, which can also achieve The effect of convenient positioning described in the first preferred embodiment.

Referring to Fig. 14, the fifth preferred embodiment of the travel angle limiting device of the bicycle of the present invention is roughly the same as the first preferred embodiment, except that the rotating block 42 has a rotating slot 421, and the fixed The block 32 has a fixing slot 321 and two fixing positioning through holes 322 spaced apart from the fixing slot 321 . The fixed slot 321, the rotation slot 421 and the fixed positioning through hole 322 are substantially equal in diameter and width, and are all arranged along the first imaginary arc surface A1. The fixing member 5 passes through the rotation slot 421, And at the same time, one of the fixing slot 321 and the fixing positioning hole 322 is pierced to fix the front fork tube unit 4 at a specific angle C, which can also achieve the convenient positioning effect of the first preferred embodiment.

Referring to Fig. 15, the sixth preferred embodiment of the travel angle limiting device of the bicycle of the present invention is roughly the same as the first preferred embodiment, except that the fixed block 32 of the head pipe unit 3 and the front fork The rotating block 42 of the pipe unit 4 is not in the shape of a flat plate, but in a shape with a large overall thickness.

16 and 17, the fixed block 32 has an outer peripheral surface 325 and an inner peripheral surface 326 connecting a top and a bottom surface of the fixed block 32, and an inner peripheral surface 326 formed on the outer peripheral surface 325 and extending radially inward to the The locking groove 327 on the inner peripheral surface 326 and a fixing slot 321 defined by the inner peripheral surface 326 , the locking groove 327 communicates with the fixing slot 321 .

The rotating block 42 has a rotating slot 421, which is formed on a top surface of the rotating block 42 and extends downward to a bottom surface. The rotating slot 421 has an arc adjacent to the top surface of the rotating block 42. A groove portion 425, and a plurality of positioning holes 426 adjacent to the bottom surface of the rotating block 42, the arc groove portion 425 extends along the direction of the first imaginary arc surface A1, and has a hole located in the direction of the first imaginary arc surface A1 A first end 427 and a second end 428, the positioning hole portion 426 extends downward from the bottom end of the arc groove portion 425 to the bottom surface of the rotating block 42, and is spaced apart from each other along the first imaginary arc surface A1 Equiangular distribution, and substantially equal to the diameter and width of the fixing slot 321 . Both the fixing slot 321 and the rotation slot 421 are located on the first imaginary arc surface A1.

The fixing member 5 is passed through the fixing slot 321. The fixing member 5 has a shaft 51, a pull ring 52 disposed on the shaft 51, and a clip disposed on the shaft 51 at a distance from the pull ring 52. Head 53.

Referring to FIG. 16 and FIG. 18 , the fixing member 5 can be positioned between a first position and a second position relative to the head pipe unit 3 . When the fixing member 5 is at the first position, a bottom end of the fixing member 5 is positioned at the arc-shaped groove portion 425 of the rotating slot 421 , and the locking head 53 is elastically extended in the locking groove 327 . The first and second ends 427 , 428 can abut against the fixing member 5 with the rotation of the front fork tube unit 4 to limit the rotation angle C of the front fork tube unit 4 .

Referring to Fig. 17 and Fig. 18, when the fixing member 5 is in the second position, the clamping head 53 is constantly stretched under the fixing block 32, the pull ring 52 is against the top surface of the fixing block 32, the fixing The bottom end of the component 5 is passed through one of the positioning holes 426 to fix the front fork tube unit 4 at a specific angle C. In this way, the effect described in the first preferred embodiment can also be achieved.

Claims (11)

1. A traveling angle limiting device of a bicycle, the bicycle has a body, a front wheel, a handle, and a rear wheel arranged on the body, the traveling angle limiting device of the bicycle comprises a rear wheel arranged on the opposite side of the body A head tube unit facing the rear wheel, and a front fork tube unit connecting the handlebar and the front wheel, characterized in that: The head tube unit includes a head tube, and a fixed block extending radially outward from an outer peripheral surface of the head tube, the fixed block has a fixing slot, the front fork tube unit includes a front fork tube, and a A rotating block extending radially outward from an outer peripheral surface of the front fork tube, the front fork tube is passed through the head pipe, the rotating block has a rotating slot, the fixed slot and the rotating slot are both Located on a first imaginary arc surface defined by the rotation axis of the front fork tube as the axis, the travel angle limiting device of the bicycle further includes a fixing piece, and the fixing piece is removably passed through the fixing groove At least one of the hole and the rotating slot. 2. The travel angle limiting device of a bicycle according to claim 1, characterized in that: the fixing and rotating slots are both in the shape of circular perforations, the diameter of the rotating slot is larger than that of the fixing slot, and a A first end and a second end on the first imaginary arc surface, the fixing member is passed through the fixing slot, and is passed between the first end and the second end of the rotation slot. 3. The travel angle limiting device of a bicycle according to claim 1, wherein the rotating slot is in the shape of an arc slot extending along the first imaginary arc surface, and has a A first end and a second end in the plane direction, the fixing slot is in the shape of a circular perforation and is located between the first and second ends, the fixing member is passed through the fixing slot, and is passed through the Between the first end and the second end of the rotation slot. 4. The travel angle limiting device of a bicycle as claimed in claim 3, wherein the fixed block of the head tube unit and the rotating block of the front fork tube unit are both formed into a flat plate shape, and the fixed block also has a gap The fixed positioning through hole of the fixed slot, the rotating block also has three rotating positioning through holes spaced apart from the rotating slot, and the rotating positioning through hole and the fixed positioning through hole are all along a first axis defined by the rotation axis. Two imaginary curved surfaces are provided for the fixing member to pass through. 5. The travel angle limiting device of a bicycle as claimed in claim 3, wherein the fixed block of the head tube unit and the rotating block of the front fork tube unit are both formed into a flat plate shape, and the fixed part is a bolt element , the rotating block also has two rotating positioning through holes spaced apart from the rotating slot, the fixed slot and the rotating slot are substantially equal in diameter and width to the rotating positioning through holes, and are all arranged along the first imaginary arc surface, The fixing part is passed through the fixing slot, and simultaneously passed through one of the rotation slot and the rotation positioning through hole. 6. The travel angle limiting device of a bicycle as claimed in claim 1, wherein the fixed block of the head tube unit and the rotating block of the front fork tube unit are both flat plate-shaped, and the fixing and rotating slots are both It is in the shape of a circular perforation, the diameter of the fixing slot is larger than that of the rotating slot, and has a first end and a second end located in the direction of the first imaginary arc surface, and the fixing piece is passed through the rotating slot , and pass through between the first end and the second end of the fixing slot. 7. The travel angle limiting device of a bicycle as claimed in claim 1, wherein the fixed block of the head pipe unit and the rotating block of the front fork pipe unit are both formed into a flat plate shape, and the fixed slot is formed along the The arc-shaped slot extending in the direction of the first imaginary arc surface has a first end and a second end located in the direction of the first imaginary arc surface. Between the first end and the second end, the fixing member is passed through the rotation slot and between the first end and the second end of the fixing slot. 8. The travel angle limiting device of a bicycle according to claim 7, wherein the fixed block also has three fixed positioning perforations spaced apart from the fixed slot, and the rotating block also has a spaced apart from the rotation slot. The rotation positioning perforation, the rotation positioning perforation and the fixed positioning perforation are arranged along a second imaginary arc surface defined by the rotation axis as the axis, the rotation positioning perforation and the fixed positioning perforation are used for the fixing member to pass through . 9. The travel angle limiting device of a bicycle as claimed in claim 1, wherein the fixed block of the head tube unit and the rotating block of the front fork tube unit are both formed into a flat plate shape, and the fixed part is a latch element , the fixed block also has two fixed positioning through holes spaced apart from the fixed slot hole, the fixed slot hole and the rotating slot hole are substantially equal in diameter and width to the fixed positioning through hole, and are all arranged along the first imaginary arc surface, The fixing member is passed through the rotation slot, and simultaneously passed through one of the fixing slot and the fixing positioning through hole. 10. The travel angle limiting device of a bicycle as claimed in claim 1, wherein the rotation slot of the rotation block is formed on a top surface of the rotation block and extends downward to a bottom surface, and the rotation slot has an arc-shaped groove portion adjacent to the top surface of the rotating block, and several positioning holes adjacent to the bottom surface of the rotating block, the arc-shaped groove portion extends along the direction of the first imaginary arc surface, and has a A first end and a second end in the direction, the positioning holes extend downward from the bottom end of the arc-shaped groove to the bottom surface of the rotating block, and are equiangularly distributed along the first imaginary arc surface at intervals , and is substantially equal in size to the aperture width of the fixing slot, the fixing piece is passed through the fixing slot hole, and is positioned between a first position and a second position relative to the head tube unit, when the fixing piece is located at the second position In the first position, a bottom end of the fixing member is located in the arc-shaped groove of the rotation slot, and the first and second ends can rotate with the front fork tube unit to resist the fixing member to limit the rotation angle of the front fork tube unit. When the fixing member is at the second position, the bottom end of the fixing member passes through one of the positioning holes to fix the front fork tube unit at a specific angle. 11. The travel angle limiting device of a bicycle as claimed in claim 10, wherein the fixed block of the head tube unit also has an outer peripheral surface and an inner peripheral surface connecting a top and a bottom surface of the fixed block, and a locking groove formed on the outer peripheral surface and extending radially inward to the inner peripheral surface, the inner peripheral surface defines the fixing slot hole, the locking groove communicates with the fixing slot hole, and the fixing member has a rod body, a pull ring arranged on the shaft, and a clamping head arranged on the shaft at a distance from the pull ring. In the groove, when the fixing part is in the second position, the clamping head is elastically stretched below the fixing block, and the pull ring is against the top surface of the fixing block.

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