TWI535618B - The bicycle folding crank-case one - Google Patents

Description

Foldable bicycle crank first case

The invention relates to a first case of a foldable bicycle crank, in particular to a foldable bicycle crank which can provide a bicycle crank which can be quickly and conveniently folded, whether in a deployed or folded state, can be effectively fixed. case.

Generally, the horizontal space occupied by the bicycle is set in the vertical direction due to the crank and the pedal system, and protrudes from both sides of the vehicle body, which greatly increases the occupied lateral volume, and moves the bicycle in addition to riding, and is easy to get stuck to other objects. Because the pedals protrude from the sides of the vehicle body, the stacking and packaging during the bicycle transportation process are quite inconvenient. The product that is circulated in the market is to set the folding mechanism on the pedal. The general folding pedal is folded in such a manner that the folding pedal is bent ninety degrees upward or downward, and the pedal is placed on the outer side of the crank. A folding method increases the lateral width, which is not conducive to the reduction of the volume of the folding, and the design of the folding mechanism is often loose, which is prone to looseness and reduces the comfort during riding.

The inventor of the present invention has another invention of a folding crank, and the invention certificate number is listed as: No. 162402. The invention has been able to pivot the crank fold, and the pedal is rotated by 90 degrees, and placed on the inner side of the crank, although the side is not increased. To the width, but must be operated by two hands when folding, and its structural design is more complicated, and the manufacturing cost is higher, so it is not perfect. In addition, the current self Other crank structures related to the folding of the pedals are often required to be operated or require tool assistance, or are time consuming and cumbersome to operate, and have inconveniences in their use, and need to be improved and broken together.

The main object of the present invention is to provide a first case of a foldable bicycle crank, which is simple and quick to perform the folding operation, and in particular, can be completed by one hand.

A further object of the present invention is to provide a first case of a foldable bicycle crank, which is very stable regardless of whether the foot pedal is used for positioning and when not in use, and there is no eccentricity or looseness of the component.

It is still another object of the present invention to provide a first case of a foldable bicycle crank which is structurally innovative and different from all current foldable bicycle cranks.

In order to further understand the object, structural features and other effects of the present invention, the drawings are described in detail as follows: as shown in Figures 1, 2, 3 and 4, the present invention provides a foldable bicycle crank first. The upper fixing member 141 and the lower fixing member 142 are combined into a fixing seat 14. The upper fixing member 141 and the lower fixing member 142 are respectively provided with two upper pivot holes 1431, 1432 and two lower pivots. The through holes 1461, 1462 are provided with a convex body 145 at the center, and the convex body 145 is provided with a through hole 144; an outer end is provided with a crank 11 of the shaft hole 111, the inner end is provided with a longitudinal shaft hole 113, and the inner end side is a concave wall surface 112 is formed on the wall surface, and a convex block 114 is disposed on the concave wall surface 112; A crank head 12 having a pedal receiving hole 126 on the outer side is provided with a longitudinal shaft hole 123. The side wall surface defines a concave wall surface 122. The concave wall surface 122 is provided with a protrusion 124, and between the crank 11 and the crank head 12. Forming a gap 125; a slider 13 having an inner wall surface 131, respectively provided with at least one groove 132, <132> and a protruding body 133 protruding outwardly, the top of the protrusion 133 is from top to bottom The chamber 134 is disposed, the elastic body 136 is placed in the chamber 134, a pressing button 135 is inserted into the chamber 134 and presses the elastic body 136, and the protruding body 133 can be positioned and moved in the through hole 144; The fixed shaft 15 is inserted and fixed in the upper pivot hole 1431, the shaft hole 113 and the lower pivot hole 1461; a central shaft 16 is inserted into the upper pivot hole 1432, the shaft hole 123 and the pivot hole 1462, and the convex body 145 The crank head 12 can be placed in the gap 125, and the central axis 16 can be rotated at a limited angle.

According to the above main features, at least one of the first latching recess 1351 and the second latching recess 1352 is provided on the side of the pressing button 135, and the first and second latching recesses 1351, 1352 can be selected to be positioned in the perforation. The card interface 140 above the 144 has another feature (shown in Figures 3 and 4).

According to the above main features, the side edge of the crank head 12 is provided with a curved surface 121, and the curved surface 121 can be moved to the side groove 1411 of the fixing seat 14 for another feature (as shown in FIG. 2).

According to the main features described above, wherein the fixed shaft 15 and the central shaft 16 are inside The inner portions are respectively provided with inner screw holes 151 and 161, and the two bolts 162 and 162 are respectively inserted into the lower pivot holes 1461 and 1462 from the bottom to the bottom, and the connecting screws are inserted into the inner screw holes 151 and 161 for another one. Features <Figure 2>.

According to the foregoing main features, the grooves 132 and <132> in the slider 13 can be closely fitted into the bumps 114 and 124 at a proper time, and the grooves 132 and <132> can be separated from the bumps 114 and 124 at a proper time. A feature <shown in Figures 5 and 6>.

According to the above main features, the shaft hole 111 of the crank 11 is connected to the connecting portion 82 of the drive shaft 80 of the bicycle to be fixed as another feature (as shown in FIG. 7).

According to the above main features, the pedal hole 126 is connected to the shaft portion 92 of the foot pedal 90 to be fixed as a further feature (as shown in FIG. 7).

According to the above main features, the upper fixing member 141 and the lower fixing member 142 can be integrally formed into a fixing seat 14 for another feature (as shown in FIG. 8).

11‧‧‧ crank

132‧‧‧ Groove

13‧‧‧ Slider

133‧‧‧ protruding body

12‧‧‧ crank head

134‧‧ ‧ room

14‧‧‧ Fixed seat

135‧‧‧ button

15‧‧‧Fixed shaft

136‧‧‧ Elastomers

16‧‧‧ center axis

140‧‧‧Carmen interface

80‧‧‧ drive shaft

141‧‧‧Upper fixture

82‧‧‧Connecting Department

142‧‧‧Lower fixtures

90‧‧‧ pedals

144‧‧‧Perforation

92‧‧‧Axis

145‧‧ ‧ convex

111‧‧‧Axis hole

151‧‧‧Inner hole

112‧‧‧ concave wall

161‧‧‧Inner hole

113‧‧‧Axis hole

162‧‧‧ bolt

114‧‧‧Bumps

1351‧‧‧First card recess

121‧‧‧ curved surface

1352‧‧‧Second card recess

122‧‧‧ concave wall

1411‧‧‧ side groove

123‧‧‧Axis hole

1431‧‧‧Upper pivot hole

124‧‧‧Bumps

1432‧‧‧Upper pivot hole

125‧‧‧ gap

1461‧‧‧ lower pivot hole

126‧‧‧ pedal access

1462‧‧‧ lower pivot hole

131‧‧‧ inner wall

Figure 1 is a perspective assembled view of the present invention.

Figure 2 is a perspective exploded view of the present invention.

Fig. 3 is a cross-sectional view showing the crank and the crank head of the present invention in a fixed state.

Figure 4 is a schematic cross-sectional view of the slider of the present invention sliding in a fixed seat.

Fig. 5 is a schematic cross-sectional view showing the groove of the slider of the present invention closely fitting into the crown of the crank head.

Figure 6 is a schematic cross-sectional view showing the groove in the slider of the present invention leaving the crank head.

Figure 7 is a perspective exploded view showing the connection of the present invention to the drive shaft and the footrest of the bicycle.

Figure 8 is a perspective exploded view of still another embodiment of the present invention.

Figure 9 is a perspective view showing the combination of the crank head of the present invention and the pedal at a 90 degree angle.

Figure 10 is a perspective view of the foot pedal of the present invention being folded in a straight line.

As shown in FIG. 1 and 2, the fixing shaft 15 is spliced and fixed in the upper pivot hole 1431, the shaft hole 113 and the lower pivot hole 1461. Therefore, the fixing base 14 is integrally fixed with the crank 11, and the fixing seat 14 is fixed. The right side has a side groove 1411, and since the crank head 12 has a curved surface 121 design, the crank head 12 is climbed by a human hand, and the crank head 12 is rotated by a finite angle with the central shaft 16 as a rotating shaft, and the crank head 12 can be rotated. Synchronously driving the pedal 90 to perform a straight extended state (shown in FIG. 10), which is defined as a state in which the footrest 90 is folded to reduce the outward convexity of the footrest 90, and vice versa. 12 can synchronously drive the foot pedal 90 to perform the reverse ninety degree rotation positioning. As shown in FIG. 9, the foot pedal 90 is horizontally extended to allow the human foot to step on, and the crank 11 is synchronously driven to Rotate the drive shaft 80 (as shown in Figure 7).

As shown in FIG. 3 and FIG. 4, it is a schematic diagram of the cross-sectional action of the slider 13 being able to be positioned or moved backward on the fixed seat 14. The protruding body 133 is inserted into the through hole 144, and the first card of the button 135 is pressed. The two recessed portions 1351 and the second latching recesses 1352 have different distances. The tension of the elastic body 136 in the chamber 134 is such that the second latching recess 1352 is latched to the latching interface 140 of the upper fixture 141. As shown in FIG. 3, the inner wall surface 131 abuts against the crank 11 and the inner wall surfaces 112, 122 of the crank head 12. The two grooves 132 and <132> are respectively closely fitted into the two protrusions 114 and 124 (as shown in FIG. 2 and FIG. 5). The definition of the action refers to the crank head 12 and the crank 11 therebetween. The state in which the second latching recess 1352 is positioned at the latching interface 140 of the upper fixing member 141 (as shown in FIG. 3), the crank head 12 and the crank 11 are in a state of being extended to each other or in a state of ninety degrees. The combination between the two is very stable, and there is no possibility of parts loosening or loosening.

As shown by the direction of the arrow in FIG. 3, the pressing button 135 is pressed upward and downward by the finger (such as the index finger), the elastic body 136 is in a contracted state in the chamber 134, and the pressing button 135 is lowered in the chamber 134, and reused. The finger (such as the thumb) applies a force to the protruding body 133, and the direction of the biasing force is as shown by the arrow direction of FIG. 4, so that the first latching recess 1351 is positioned on the latching interface 140 of the upper fixing member 141. At this time, the inner wall surface 131 leaves the concave wall surface 112, 122, the groove 132, <132> leaves the convex block 114, 124 (as shown in FIG. 2 and FIG. 6), and the slider 13 is positioned at the state of the crank head 12 and the crank 11 disappears. In order to make the crank head 12 have a finite angle of rotation in the side groove 1411 with the central axis 16 as the rotating shaft, to select the crank head 12 to be in a straight extending state with respect to the crank 11 or at a state of ninety degrees. After the user determines that the pedal 90 is in the folded state (ie, the straight extended state) or is in the use state of ninety degrees, the finger 13 is reversely biased by the finger, and the protruding body 133 is in the through hole 144. When shifting forward, the push button 135 is synchronously displaced with the slider 13, and the first click recess 1351 is displaced to further away After the interface 140, the elastic body 136 is lifted upward in the chamber 134, so that the second click recess 1352 is positioned on the cassette interface 140 as shown in FIG. 3 to make the crank head 12 and the crank. 11 The combination between the two is very stable, and there is no possibility of parts loosening or loosening.

The grooves 132 and <132> may also be replaced by bumps, and the bumps 114 and 124 may be replaced by grooves. The equivalent structural reaction of the male and female partners is included in the patent application scope of the present invention.

In summary, in this case, the shifting of the push button 135 and the slider 13 can be operated by one hand, which is very fast and convenient in operation, and the foot pedal 90 can be used in the positioning state and when not in use. The positioning status is very stable, and there is no eccentricity or looseness of the components and can be operated by one hand. It is obvious that the purpose of the present invention has been achieved with great achievement, and the requirements for novelty and progress of the invention have been met. The invention patent is granted.

11‧‧‧ crank

12‧‧‧ crank head

14‧‧‧ Fixed seat

15‧‧‧Fixed shaft

16‧‧‧ center axis

111‧‧‧Axis hole

126‧‧‧ pedal access

133‧‧‧ protruding body

135‧‧‧ button

141‧‧‧Upper fixture

142‧‧‧Lower fixtures

Claims (8)

The utility model relates to a foldable bicycle crank, which is characterized in that: the upper fixing member and the lower fixing member are combined into a fixing seat, and the upper fixing member and the lower fixing member are respectively provided with two upper pivot holes and two lower pivot holes The central portion is provided with a convex body, and the convex body is provided with a perforation; an outer end is provided with a crank hole of the shaft hole, the inner end is provided with a longitudinal shaft hole, and a concave wall surface is formed on the side wall surface of the inner end, and the concave wall surface is formed on the concave wall surface a crank piece is provided on the outer side; a crank head having a pedal hole is arranged on the outer side, and a longitudinal shaft hole is formed on the body, the side wall surface forms a concave wall surface, the concave wall surface is provided with a convex block, and a gap is formed between the crank and the crank head; a slider on the inner wall surface thereof is respectively provided with at least one groove and a protruding body protruding outwardly. The top of the protrusion body is provided with a chamber from top to bottom, and the elastic body is placed in the chamber a pressing button is placed into the chamber and presses the elastic body, and the protruding body can be positioned and moved in the through hole; a fixed shaft is fixedly connected to the upper pivot hole, the shaft hole and the lower pivot hole; The shaft is inserted into the upper pivot hole, the shaft hole and the pivot hole, and the convex body is accommodated in the gap, and the crank head can be Rotation center axis, to make a limited angle swirling. The foldable bicycle crank according to claim 1, wherein at least one of the first latching recess and the second latching recess are provided on the side of the pressing button, and the first and second latching recesses are selectable.掣 Position on the cassette interface above the perforation. The foldable bicycle crank according to claim 1, wherein the side edge of the crank head is provided with a curved surface, and the curved surface is movable in a side groove of the fixed seat. A foldable bicycle crank according to claim 1 of the patent application, wherein the fixed shaft and the center The inner part of the shaft is respectively provided with an inner screw hole, and the two bolts are respectively inserted into the lower pivot hole from the bottom to the upper, and the connecting screw is inserted into the inner screw hole. According to the foldable bicycle crank described in claim 1, wherein the groove in the slider can be tightly fitted into the bump at a timely time, and the groove can leave the bump at a timely time. The foldable bicycle crank according to claim 1, wherein the shaft hole of the crank is fixedly connected to the connecting portion of the drive shaft of the bicycle. The foldable bicycle crank according to claim 1, wherein the pedal hole is fixedly connected to the shaft portion of the foot pedal. The foldable bicycle crank according to claim 1, wherein the upper fixing member and the lower fixing member are integrally formed as a fixed seat.