Seating prevention structure and bicycle or electric assist bicycle that holds said seating prevention structure

Abstract

To provide a structure for inhibiting seating on a general-purpose saddle of a bicycle or a power-assisted bicycle.SOLUTION: A structure for seating inhibition can be attached to a frame or a seat pillar of a bicycle. According to a user's operation, the structure can be mutually shifted to an initial state which does not hinder seating of the user on a saddle of the bicycle, and an expanded state in which the structure is mechanically expanded at least sideways of the saddle when viewed from above the bicycle, or to the vicinity of side parts of the saddle, in order to hinder seating of the user on the saddle.SELECTED DRAWING: Figure 3A

Description

[Technical Field]

[0001] The present invention relates to a structure for preventing a person from sitting on a bicycle or an electrically assisted bicycle. [Background technology]

[0002] Electrically assisted bicycles are widely known as vehicles equipped with a battery and a motor that run by human power. This is beneficial because it allows people to move with less effort than a normal bicycle that runs solely on human power.

[0003] On the other hand, under previous Japanese law, motor assistance was not permitted while pushing an electrically assisted bicycle.

[0004] However, when the user dismounts from the power-assisted bicycle and pushes it around, or when it is not being used as a vehicle, the power-assisted bicycle is heavier than a regular bicycle due to the battery, motor, etc., and therefore requires more effort than pushing a regular bicycle, reducing convenience. In particular, pushing a power-assisted bicycle uphill with a child or heavy luggage on it can be a heavy burden for elderly people and women who are weaker in strength.

[0005] Against this background, the Road Traffic Act and the accompanying amendments to the Enforcement Regulations (Non-Patent Document 1), which came into effect in December 2019, now allow electric assist bicycles to be treated as walking aids if they meet certain conditions, such as being "vehicles that do not allow the use of ordinary bicycle riding devices (excluding child seats)." Even when pushing an electric assist bicycle, it can provide assistance if certain conditions are met.

[0006] Patent documents 1 and 2, etc., already disclose assistance when pushing an electrically assisted bicycle. However, there are problems with determining whether the electrically assisted bicycle is being pushed, and the above-mentioned condition of disabling the riding device (i.e., the saddle) from being used is not taken into consideration.

[0007] Patent Document 3 discloses an anti-theft device that includes a seating prevention section, but it cannot be used with a general-purpose saddle. However, according to this document, the anti-theft effect can be achieved when seating prevention is performed. Patent Document 4 also shows a saddle cover that prevents the saddle from getting wet, but does not have the effect of preventing seating. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 11-49078 [Patent Document 2] Japanese Patent Application Publication No. 10-324290 [Patent Document 3] Utility Model Registration No. 3156660 [Patent Document 4] Japanese Patent Application Publication No. 11-139367 [Non-patent literature]

[0009] [Non-Patent Document 1] Official Gazette of September 19, 2019 (Extra No. 117) (Volume 1 of 2) Cabinet Office Order No. 31 Summary of the Invention [Problem to be solved by the invention]

[0010] SUMMARY OF THE INVENTION It is therefore an object of the present invention, according to one aspect, to provide a structure for preventing a person from sitting on a general-purpose saddle of a bicycle or electrically assisted bicycle. [Means for solving the problem]

[0011] The seating prevention structure of the present invention is a structure that can be attached to the frame or seat post of a bicycle and can be switched between an initial state in which the user is not prevented from sitting on the bicycle saddle and an expanded state in which the structure is mechanically expanded at least to the side of the saddle or near the side of the saddle when viewed from above the bicycle so as to prevent the user from sitting on the saddle, by the user's operation. [Effects of the Invention]

[0012] According to one aspect, it is possible to prevent a person from sitting on a general-purpose saddle of a bicycle or an electric-assisted bicycle. [Brief explanation of the drawings]

[0013] [Figure 1A] FIG. 1A is a schematic side view of the seating-prevention structure according to the first embodiment in an initial state. [Figure 1B] FIG. 1B is a diagram showing an outline of a front view of the seating-prevention structure according to the first embodiment in an initial state. [Figure 2] 2(a) to 2(c) are diagrams for explaining the transition from the initial state to the deployed state of the seating-prevention structure according to the first embodiment. [Figure 3A] FIG. 3A is a schematic side view of the seating-prevention structure according to the first embodiment in the deployed state. [Figure 3B] FIG. 3B is a diagram showing an outline of the front of the seating-prevention structure according to the first embodiment in the unfolded state. [Figure 3C] FIG. 3C is a diagram showing an outline of the top surface of the seating-prevention structure according to the first embodiment in the unfolded state. [Figure 4] FIG. 4 is a diagram for explaining a case where the seating-prevention structure according to the first embodiment is used as an operating part for an assist. [Figure 5] FIG. 5 is a diagram for explaining a case where the seating-prevention structure according to the first embodiment is used as a brake operating portion. [Figure 6]FIG. 6 is a schematic diagram of a case where a person pushes an electrically assisted bicycle uphill. [Figure 7] FIG. 7 is a schematic diagram of a case where a person pushes an electrically assisted bicycle downhill. [Figure 8] FIG. 8 is a diagram showing the relationship between the main body of the seating-prevention structure according to the first embodiment and the motor control device and other components. [Figure 9A] FIG. 9A is a schematic side view of the seating-prevention structure according to the second embodiment in an initial state. [Figure 9B] FIG. 9B is a diagram showing an outline of a front view of the seating-prevention structure according to the second embodiment in an initial state. [Figure 10A] FIG. 10A is a diagram for explaining the transition from the initial state to the deployed state of the seating-prevention structure according to the second embodiment. [Figure 10B] FIG. 10B is a diagram for explaining the transition from the initial state to the deployed state of the seating-prevention structure according to the second embodiment. [Figure 11A] FIG. 11A is a diagram showing an outline of the top surface of the seating-prevention structure according to the second embodiment in the unfolded state. [Figure 11B] FIG. 11B is a schematic front view of the seating-prevention structure according to the second embodiment in the unfolded state. [Figure 12] FIG. 12 is a diagram for explaining a case where the seating prevention structure according to the second embodiment is used as an operating part for an assist. [Figure 13] FIG. 13 is a diagram for explaining a case where the seating-prevention structure according to the second embodiment is used as a brake operating portion. [Figure 14] FIG. 14 is a diagram showing the relationship between the main body of the seating-prevention structure according to the second embodiment and the motor control device and other components. [Figure 15A] FIG. 15A is a schematic side view of the seating-prevention structure according to the third embodiment in an initial state. [Figure 15B]FIG. 15B is a diagram showing an outline of a front view of the seating-prevention structure according to the third embodiment in an initial state. [Figure 16A] FIG. 16A is a schematic front view of the seating-prevention structure according to the third embodiment in the unfolded state. [Figure 16B] FIG. 16B is a diagram showing an outline of the top surface of the seating-prevention structure according to the third embodiment in the unfolded state. [Figure 17] FIG. 17 is a diagram for explaining a case where the seating-prevention structure according to the third embodiment is used as an operating part for an assist. [Figure 18] FIG. 18 is a diagram for explaining a case where the seating-prevention structure according to the third embodiment is used as a brake operating portion. [Figure 19A] FIG. 19A is a diagram showing an outline of a side view of the seating-prevention structure according to the fourth embodiment in an initial state. [Figure 19B] FIG. 19B is a diagram showing an outline of the top surface of the seating-prevention structure according to the fourth embodiment in an initial state. [Figure 20A] FIG. 20A is a diagram showing an outline of the top surface of the seating-prevention structure according to the fourth embodiment in the middle of deployment. [Figure 20B] FIG. 20B is a schematic side view of the seating-prevention structure according to the fourth embodiment in the middle of deployment. [Figure 21A] FIG. 21A is a schematic side view of the seating-prevention structure according to the fourth embodiment in the unfolded state. [Figure 21B] FIG. 21B is a diagram showing an outline of the top surface of the seating-prevention structure according to the fourth embodiment in an initial state. [Figure 22] FIG. 22 is a diagram for explaining a case where the seating-prevention structure according to the fourth embodiment is used as an operating part for an assist. [Figure 23] FIG. 23 is a diagram for explaining a case where the seating-prevention structure according to the fourth embodiment is used as a brake operating portion. [Figure 24]FIG. 24 is a diagram showing the relationship between the main body of the seating-prevention structure according to the fourth embodiment and the motor control device and other components. [Figure 25] FIG. 25 is a diagram for explaining the problems that arise when the seating prevention structure is made to function as an operating section. DETAILED DESCRIPTION OF THE INVENTION

[0014] The seating prevention structure in the embodiment described below can also be used for purposes such as preventing bicycle theft, but below it will be described primarily from the perspective of enabling motor assistance while pushing an electrically assisted bicycle in accordance with the Road Traffic Act Enforcement Regulations. [Embodiment 1] FIG. 1A shows a schematic side view of seating-prevention structure 220 according to this embodiment in its initial state. Seating-prevention structure 220 includes main body 221, an extendable rod-shaped first member 222, a rod-shaped second member 223, a rod-shaped third member 224, and a connecting portion 225. Main body 221 is attached to seat tube 203 of frame 204 of the power-assisted bicycle or to seat post 202, the tip of which is provided with saddle 201. Main body 221 has rotating portion 2211 that rotates around an axis of rotation perpendicular to the plane of the side view of FIG. 1A (i.e., an axis of rotation perpendicular to the direction of travel of the power-assisted bicycle and the direction toward the ground), and one end of first member 222 is connected to rotating portion 2211. Main body 221 is also provided with a lock release button 2212 for returning the main body 221 to its initial state from the unfolded state, which prevents seating on saddle 201.

[0015] As described above, one end of the first member is connected to the rotating portion 2211 of the main body 221, and the other end is connected to one end of the second member 223 via a connecting portion 225. In the initial state, the first member is fixed at an angle that aligns with, for example, the seat tube 203. One end of the second member 223 is connected to the first member 222 via the connecting portion 225, and the other end is connected to one end of the third member 224. The second member 223 can be tilted toward the front of the paper at the connecting portion 225, but in the initial state, it is tilted parallel to the paper so as to align with the first member 222. One end of the third member 224 is connected to the other end of the second member 223, but nothing is connected to the other end. In this embodiment, the angle formed between the second member 223 and the third member 224 is fixed and is a right angle, and in the initial state, they are parallel to the paper.

[0016] FIG. 1B shows a front view of the seating prevention structure 220 in its initial state (as seen from the front of the saddle 201). As can be seen from FIG. 1B, the rotating portion 2211, the unlock button 2212, the first member 222, the second member 223, the connecting portion 225, and the third member 224 shown in FIG. 1A are provided on the left and right sides of the power-assisted bicycle. However, the third member 224 is not shown in this figure. By providing the same components on the left and right sides of the power-assisted bicycle in this way, it can be used by both right-handed and left-handed users. Note that although the right side in FIG. 1B is labeled with a reference symbol a and the left side is labeled with a reference symbol b, their functions and structures are the same. The rotating portions 2211a and 2211b rotate in unison, and therefore the first members 222a and 222b also rotate in unison.

[0017] Next, the transition from the initial state to the deployed state will be explained using Figure 2. Figure 2 shows a perspective overview of the vicinity of the seating prevention structure 220. Figure 2(a) shows the initial state, with the first member 222 and the second member 223 fixed at an angle parallel to the seat tube 203. The third member 224 faces toward the rear of the electrically assisted bicycle. The first member has an extendable structure, but is retracted to its shortest state so as not to interfere with the rotation of the pedals and crank.

[0018] Next, the user rotates the first member 222 and the second member 223 using the rotating unit 2211, and raises them so that they face the saddle 201. In this embodiment, as shown in FIG. 2(b), for example, they are rotated to an angle that makes them parallel to the seat tube 203 and the seat post 202. In this state, the rotation of the rotating unit 2211 is temporarily locked. Also, in this state, the third member 224 faces forward of the power-assisted bicycle. Furthermore, the user extends the length of the second member 223 to the desired length.

[0019] 2(c), the user lifts the connecting portion between the second member 223 and the third member 224 so as to rotate it around the connecting portion 225, and when the second member 223 is, for example, perpendicular to the first member 222, the lock is temporarily engaged. In this way, when the rotation of the first member 222 is locked by the rotating portion 2211 and the rotation of the second member 223 is locked by the connecting portion 225, the user is prevented from sitting on the saddle 201, and the seating-prevention structure 220 is deployed. More specifically, the connecting portion 225, the second member 223, and the third member 224 prevent the user from placing their thighs on the saddle 201 even if they sit on it, preventing them from sitting.

[0020] Furthermore, in the unfolded state shown in FIG. 2(c), the second member 223 extending horizontally to the side of the saddle 201 is a member that the user grips and pushes. Below, it will be explained that tilting the second member 223 in the forward direction of the power-assisted bicycle commands assistance, and tilting it in the reverse direction commands regenerative braking. However, even if this implementation is not performed, if the user holds the second member 223 in the unfolded state, for example, with their hand while pushing the power-assisted bicycle, they can stably support and push the power-assisted bicycle. Note that regenerative braking is just one example, and other braking operations may also be used, such as braking that occurs without flowing current to the battery. This also applies hereinafter.

[0021] When returning from the unfolded state to the initial state, the lock is released by pressing the unlock button 2212, and the second member 223 can be folded toward the first member 222, and the first member 222 and the second member 223 can be rotated in the reverse direction to return to their original angle.

[0022] FIG. 3A shows a schematic side view of the seating-prevention structure 220 in the unfolded state. Since FIG. 2(c) does not show the positional relationship with the saddle 201 and other components, FIGS. 3A to 3C will mainly explain the positional relationship with the saddle 201 and other components. As described with reference to FIG. 2, in the unfolded state in FIG. 3A, the first member 222 is rotated at an angle so as to be parallel to the seat tube 203 and the seat post 202. However, this is merely an example, and it is sufficient to rotate the first member 222 to an angle facing the saddle 201 so as to prevent seating. Furthermore, the connecting portion 225, the second member 223, and the third member 224 are disposed beside the saddle 201, and in the example of FIG. 3A, at least a portion of each of these members is higher than the saddle 201. In this state, it is difficult to sit on the saddle 201.

[0023] 3B shows a front view of seating-prevention structure 220 in the unfolded state (as seen from the front of saddle 201). First member 222a, second member 223a, connecting portion 225a, and third member 224a are arranged on the right side of saddle 201, while first member 222b, second member 223b, connecting portion 225b, and third member 224b are arranged on the left side of saddle 201. In this example, connecting portions 225a and 225b, second members 223a and 223b, and third members 224a and 224b are higher than saddle 201, making it impossible for a user to place their thighs normally even when sitting on saddle 201. In particular, third members 224a and 224b protrude diagonally upward and forward, making it even more difficult to sit on. Both second members 223a and 223b are rotated at connecting portions 225a and 225b so that they extend horizontally. This is to ensure seating prevention, but in some cases, only one of them may be rotated.

[0024] In this embodiment, rotating parts 2211a and 2211b rotate in unison, so that when one rotates, the other rotates accordingly. Since it may be difficult to interlock connecting parts 225a and 225b, they do not have to be interlocked, but they will open before either one of second members 223 is locked.

[0025] 3C shows a top view of the seating prevention structure 220 in the deployed state. The second members 223a and 223b face the sides of the saddle 201, and the third members 224a and 224b face the direction of travel. This arrangement makes it very difficult to sit on the seat.

[0026] Note that, when seat post 202 is pulled out from seat tube 203 and saddle 201 is raised, there is a possibility that saddle 201 may become higher than the upper end of seating-prevention structure 220 in some cases, but the user will still not be able to place their thighs in the normal position, so the difficulty of sitting on the seat will remain. Also, if seating-prevention structure 220 is attached to seat post 202, the positional relationship with saddle 201 will be maintained even when seat post 202 is pulled out from seat tube 203, so the difficulty of sitting on the seat will remain.

[0027] Next, the operation of the seating-prevention structure 220 when it is also used as an operating unit for issuing an instruction for assistance while pushing the power-assisted bicycle will be described with reference to FIG.

[0028] FIG. 4 shows a side view of the seating-prevention structure 220. When transitioning to the unfolded state, the rotating unit 2211 is temporarily locked at an angle such that the first member 222 is parallel to the seat tube 203 and the seat post 202. However, once the completion of transition to the unfolded state is detected, the rotating unit 2211 is unlocked and transitions to a state in which the system can receive a command from the user to at least execute powered driving using the motor. Then, when the user, for example, pushes the second member 223 in the direction of travel to rotate the first member 222 and the rotating unit 2211 by an angle +θ (e.g., +1° to +10°), this is an instruction for powered driving. Here, a positive angle indicates a counterclockwise rotation. In the unfolded state, the angle at which the first member 222 is parallel to the seat tube 203 and the seat post 202 is the initial angle (also called the standby angle). When the user stops pushing the second member 223, the rotating unit 2211 automatically returns to the initial angle by a mechanism such as a spring. With this mechanism, powered driving will not occur simply by the bicycle being in the unfolded state, and powered driving will stop if the user moves away from the power-assisted bicycle in the unfolded state.

[0029] The seating-prevention structure 220 according to this embodiment can also be used as an operating unit for issuing a brake command while pushing the power-assisted bicycle. The operation in this case will be described with reference to FIG.

[0030] FIG. 5 shows a side view of the seating-prevention structure 220. When transitioning to the unfolded state, the rotating part 2211 is temporarily locked at an angle such that the first member 222 is parallel to the seat tube 203 and the seat post 202. However, when the completion of transition to the unfolded state is detected, the lock of the rotating part 2211 is released, and the system transitions to a state in which it can receive instructions from the user to execute motor-driven driving and regenerative braking. Then, when the user pulls the second member 223 backward, for example, to rotate the first member 222 and the rotating part 2211 by an angle −θ (for example, −1° to −10°), this is an instruction for regenerative braking. When braking downhill, applying regenerative braking in this way reduces the burden on the user. In the unfolded state, the initial angle is the angle at which the first member 222 is parallel to the seat tube 203 and the seat post 202, and when the user stops pulling the second member 223, the rotating part 2211 automatically returns to the initial angle by a mechanism such as a spring. With this mechanism, regenerative braking is not performed simply by switching to the unfolded state, and regenerative braking is stopped when the user moves away from the power-assisted bicycle in the unfolded state.

[0031] FIG. 6 shows a schematic diagram of a user pushing an electrically assisted bicycle 1 equipped with a seat-prevention structure 220 according to this embodiment uphill. In this embodiment, for example, the user holds the left handlebar with left hand 251 and the second member 223 with right hand 252, supporting the electrically assisted bicycle 1, and then pushes the second member 223 with right hand 252 to prevent the electrically assisted bicycle 1 from rolling backward. This simple operation powers the motor to provide assistance uphill, reducing the user's effort. Even when supporting the electrically assisted bicycle 1 by holding the left handlebar with the left hand and the right handlebar with the right hand, the user can also power the motor to provide assistance uphill by pushing the second member 223 with their waist, for example. In either case, assistance can be provided in a more natural way than when a push-walk command button is provided on the operation panel and the user must continuously press it.

[0032] 7 schematically shows a user pushing an electric power-assisted bicycle 1 equipped with a seat-prevention structure 220 according to this embodiment downhill. In this embodiment, for example, the user holds the left handlebar with their left hand 251 and the second member 223 with their right hand, supporting the electric power-assisted bicycle 1, and then pulls the second member 223 with their right hand 252 to prevent the electric power-assisted bicycle 1 from sliding downhill under its own weight. This simple operation enables regenerative braking of the motor to brake downhill, reducing the user's effort. Note that even when supporting the electric power-assisted bicycle 1 by holding the left handlebar with their left hand and the right handlebar with their right hand, the user can also regeneratively brake the motor by, for example, placing their body in front of the second member 223 and pushing the second member 223 backward with their hips.

[0033] As described above, the seating prevention structure 220 according to this embodiment not only functions to prevent the user from sitting down by transitioning from the initial state to the deployed state, but also functions as an operation unit for issuing instructions to the motor control device to execute powered driving by the motor and to execute regenerative braking while the user is pushing the vehicle. However, it may also be configured so that only instructions to execute powered driving can be issued.

[0034] The seating prevention structure 220 according to this embodiment is designed to be added to a general power-assisted bicycle, so there is no need to prepare a special saddle or the like.

[0035] Even in cases where the only function is to prevent the user from sitting down, when it is detected that the bicycle has been deployed, a circuit or the like built into the main body 221 may output a signal to the motor control device of the electrically assisted bicycle indicating that at least power drive by the motor is permitted while the bicycle is being pushed, and further, when a push-walk instruction button or the like provided on the operation panel is pressed, the motor control device may actually control the motor to power drive.

[0036] Furthermore, if the seating prevention structure 220 is also made to function as an operating unit, after detecting that it has entered the deployed state, when a command to power the bicycle is given as shown in Figure 4, a circuit or the like built into the main body 221 may output a signal to the motor control device instructing it to power the motor while the electrically assisted bicycle is being pushed, and the motor control device may be controlled in accordance with the signal to actually power the motor.

[0037] Furthermore, if the seating prevention structure 220 is also made to function as an operating unit, after detecting that it has entered the deployed state and a command to perform regenerative braking is given, a circuit or the like built into the main body 221 may output a signal to the motor control device instructing regenerative braking by the motor while the electrically assisted bicycle is being pushed, and the motor control device may be controlled in accordance with the signal to actually perform regenerative braking by the motor.

[0038] 8 shows the relationship between the main body 221 of the seating prevention structure 220 and the motor control device 102, etc. The motor control device 102 has a function to control at least power driving by the motor 105, and in this embodiment, it controls at least power driving so that the speed is below a predetermined speed while the electrically assisted bicycle is being pushed. The motor control device 102 may also have a function to control regenerative braking by the motor, and in that case, in this embodiment, regenerative braking is performed while the electrically assisted bicycle is being pushed. An operation panel 106 is connected to the motor control device 102, and a power switch provided on the operation panel 106 is used to supply power from the battery 101 to the motor control device 102, motor 105, etc.

[0039] The main body 221 has an angle sensor 262 that detects the rotation angle of the rotation axis of the rotating part 2211, a lock detection part 263 that detects the locking of the connecting part 225, an unlock detection part 264 that detects that the unlock button 2212 has been pressed, and a state detection part 261 that detects the state of the seating prevention structure 220 based on the outputs from the angle sensor 262, the lock detection part 263 and the unlock detection part 264.

[0040] When the angle sensor 262 detects that the rotating part 2211 has rotated to a predetermined angle where the first member 222 faces the saddle 201, and the lock detection part 263 detects that the coupling part 225 has locked, the state detection part 261 detects that the state has transitioned from the initial state to the unfolded state. At this time, the state detection part 261 may be configured to output a signal to the motor control device 102 indicating that at least power driving by the motor is permitted while the power-assisted bicycle is being pushed. As described above, if the seat-prevention structure 220 only has the function of preventing the user from sitting on the bicycle, by outputting such a signal to the motor control device 102, the motor control device 102 will determine that the power-assisted bicycle is ready to be pushed, and will control the motor 105 to perform power driving when a push-walk instruction button provided on the operation panel 106, for example, is pressed.

[0041] Furthermore, after detecting that the state detection unit 261 has transitioned to the unfolded state, if the angle sensor 262 detects that the rotating unit 2211 has rotated +θ from the initial angle, the state detection unit 261 outputs a signal to the motor control device 102 instructing the motor to power drive. In response to this signal, the motor control device 102 controls the motor 105 to power drive. Note that the speed of the electrically assisted bicycle must be equal to or less than a predetermined speed.

[0042] Furthermore, after detecting that the state has shifted to the deployed state, when the angle sensor 262 detects that the rotating part 2211 has rotated by −θ from the initial angle, the state detection part 261 outputs a signal instructing regenerative braking by the motor to the motor control device 102. In response to such a signal, the motor control device 102 controls the motor 105 to perform regenerative braking.

[0043] As described above, the rotating part 2211 is configured to return to the initial angle unless the second member 223 is pushed in the forward direction or pulled in the backward direction. Therefore, when the angle sensor 262 detects that the rotating part 2211 has returned to the initial angle, the state detection part 261 stops outputting the signal instructing power driving by the motor or the signal instructing regenerative braking by the motor.

[0044] Furthermore, when the unlock detection unit 264 detects that the unlock button 2212 has been pressed, the state detection unit 261 stops outputting a signal indicating that at least power driving by the motor is permitted while the power-assisted bicycle 1 is being pushed. As a result, no assistance is provided even while the power-assisted bicycle 1 is being pushed.

[0045] The seating prevention structure 220 can enhance the level of theft prevention by linking with the power-assisted bicycle 1 or the bicycle's locking mechanism. For example, when the power-assisted bicycle 1 or the like is stopped, the seating prevention structure 220 is deployed, and the locking mechanism is then locked, a mechanism is adopted in which a signal permitting or instructing power driving cannot be output to the motor control device 102, and the unlock button 2212 cannot be pressed. This provides double theft prevention.

[0046] In this embodiment, first member 222, second member 223, and third member 224 rotate around an axis perpendicular to the direction of travel of the electrically assisted bicycle and the ground, and after transitioning to the unfolded state, second member 223 faces the side of saddle 201 and moves approximately horizontally even as it rotates, providing high stability to the electrically assisted bicycle while being pushed along. Although the handlebars may sway from side to side around the head tube as an axis, the movement of second member 223 is approximately horizontal in the direction of travel, so operation of second member 223 does not interact with or amplify the swaying of the handlebars.

[0047] [Embodiment 2] FIG. 9A shows a schematic side view of the seat-prevention structure 320 according to this embodiment in its initial state. The seat-prevention structure 320 includes a main body 321, a connecting portion 322, and a rod-shaped, fan-shaped member 323. The main body 321 is attached to the seat post 202 or the seat tube 203. The connecting portion 322 connects the main body 321 and the member 323, and rotates as a whole to rotate the member 323 so that it is parallel to the ground. The connecting portion 322 also serves as an axis for the member 323 to unfold, as described below. Furthermore, when issuing an instruction to the motor control device to use the motor for power driving or regenerative braking, the connecting portion 322 can slide the member 323 in the forward direction or the backward direction. In the initial state, the tip of the member 323 faces toward the ground.

[0048] Figure 9B shows a front view of seating-prevention structure 320 in its initial state. As mentioned above, member 323 can be unfolded into a fan-like shape, and therefore includes lower rod-shaped member 323a, upper rod-shaped member 323b, and folded sheet portion 323c. When unfolded, sheet portion 323c has an approximately semicircular shape, with one radius of the semicircle connected to rod-shaped member 323a and the other radius of the semicircle connected to rod-shaped member 323b. In Figure 9B, the tip of member 323 also faces toward the ground.

[0049] Next, the transition to the deployed state in this embodiment will be described using Figures 10A and 10B. Figure 10A shows a schematic front view of seating-prevention structure 320 in the middle of deployment (as seen from the front of saddle 201). From the state shown in Figure 9B, for example, the tip of member 323 is pulled up so that connecting portion 322 is rotated counterclockwise by 90 degrees, and protrudes to the right side when viewed from above the power-assisted bicycle. At this stage, the first lock is engaged.

[0050] FIG. 10B shows an overview of the top view with saddle 201 removed. As shown in FIG. 10A, member 323 is pulled up so that the tip of member 323 faces the right side of saddle 201. Then, as shown by the arrow, the tip of rod-shaped member 323b at the top of member 323 is rotated 180 degrees counterclockwise around the axis within connecting portion 322 so that it faces away from saddle 201. This engages the second lock, which puts the unit into the deployed state.

[0051] 11A shows an outline of the top surface in the unfolded state, with saddle 201 removed. In the unfolded state in this embodiment, lower rod-shaped member 323a remains on the right side as viewed from the front of saddle 201, seat portion 323c is unfolded in a semicircular shape, and upper rod-shaped member 323b faces left as viewed from the front of saddle 201.

[0052] 11B shows an outline of the front view of saddle 201 in the unfolded state. As mentioned above, lower rod-shaped member 323a faces to the right, upper rod-shaped member 323b faces to the left, and seat portion 323b is unfolded between them.

[0053] In this unfolded state, even if a person can sit on saddle 201, seating prevention structure 320 prevents the user from lowering their feet in a normal position, effectively preventing them from sitting on saddle 201. Furthermore, in this unfolded state, rod-shaped member 323b or 323a extending horizontally to the side of saddle 201 is a member for the user to push with, for example, their hands or waist. Below, we will explain how rod-shaped member 323b or 323a is used to command assist when sliding it in the forward direction of the power-assisted bicycle, and to command regenerative braking when pulled in the reverse direction. However, even without this implementation, if the user holds rod-shaped member 323b or 323a in their hands and pushes the power-assisted bicycle while walking in the unfolded state, they can stably support and push the power-assisted bicycle while walking. Note that rod-shaped member 323b or 323a may be equipped with additional members to make it easier for the user to hold.

[0054] When returning from the unfolded state to the initial state, as in the first embodiment, the two locks are released by pressing the unlock button (not shown), and the sheet portion 323c is folded in the opposite direction while the rod-shaped member 323b is returned clockwise to the rod-shaped member 323a to be integrated, and the connecting portion 322 is rotated so that the tip of the member 323 faces the ground.

[0055] Next, the operation of the seating-prevention structure 220 when it is also used as an operating unit for issuing an instruction for assistance while pushing the power-assisted bicycle will be described with reference to FIG.

[0056] FIG. 12 shows an outline of the top surface of the seating prevention structure 320. In this embodiment, the rod-shaped members 323a and 323b and the seat portion 323c are designed to slide forward in the unfolded state. That is, when the user pushes the rod-shaped member 323a, for example, from the initial position (also called the standby position) indicated by the dotted line in the direction of travel of the power-assisted bicycle, sliding it forward by a length L (e.g., 1 to 50 mm), this commands powered driving. Note that sliding forward represents the positive direction. For example, if the user does not push the rod-shaped member 323a, the member 323a is automatically returned to the initial position by a mechanism such as a spring. This mechanism prevents powered driving when the bicycle is simply unfolded, and powered driving is stopped when the user moves away from the power-assisted bicycle in the unfolded state.

[0057] The seating-prevention structure 320 according to this embodiment can also be used as an operating unit for issuing a brake command while pushing the power-assisted bicycle. The operation in this case will be described with reference to FIG.

[0058] FIG. 13 shows an outline of the top surface of seating-prevention structure 320. In this embodiment, rod-shaped members 323a and 323b and seat portion 323c can be slid rearward in the unfolded state. That is, when the user pulls rod-shaped member 323a, for example, from the initial position (standby position) indicated by the dotted line in the direction of backward movement of the power-assisted bicycle, and slides it rearward by a length L (e.g., 1 to 50 mm), this signals regenerative braking. When the user does not pull rod-shaped member 323a, for example, member 323a is automatically returned to the initial position by a mechanism such as a spring. With this mechanism, regenerative braking is not performed simply by the unfolded state, and power driving and regenerative braking are stopped when the user moves away from the power-assisted bicycle in the unfolded state.

[0059] In the first embodiment, the user's posture when pushing the electrically assisted bicycle as shown in Figures 6 and 7 is roughly the same, for example, holding the left handle with the left hand and pushing or pulling the rod-shaped member 323a with the right hand. When gripping the handle with both hands, the user may also push the rod-shaped member 323a with their waist. Furthermore, a hole may be drilled in the seat portion 323c near the rod-shaped member 323a so that the user can insert their finger into the hole and grip the rod-shaped member 323a.

[0060] As described above, the seating prevention structure 320 according to this embodiment not only functions to prevent the user from sitting down by transitioning from the initial state to the deployed state, but also functions as an operation unit for issuing instructions to the motor control device to execute powered driving by the motor and to execute regenerative braking while the user is pushing the vehicle. However, it may also be configured so that only instructions to execute powered driving can be issued.

[0061] The seating prevention structure 320 according to this embodiment is designed to be added to a general power-assisted bicycle, so there is no need to prepare a special saddle or the like.

[0062] Even in cases where the only function is to prevent the user from sitting down, when it is detected that the bicycle has been deployed, a circuit or the like built into the main body 321 may output a signal to the motor control device of the electrically assisted bicycle indicating that at least power drive by the motor is permitted while the bicycle is being pushed, and further, when a push-walk instruction button or the like provided on the operation panel is pressed, the motor control device may actually control the motor to power drive.

[0063] Furthermore, if the seating prevention structure 320 is also made to function as an operating unit, after detecting that it has entered the deployed state, when a command to power the bicycle is given as shown in Figure 12, a circuit or the like built into the main body 321 may output a signal to the motor control device instructing it to power the motor while the electrically assisted bicycle is being pushed, and the motor control device may then be controlled in accordance with the signal to actually power the motor.

[0064] Furthermore, if the seating prevention structure 320 is also made to function as an operating unit, after detecting that it has entered the deployed state and a command for regenerative braking is given, a circuit or the like built into the main body 321 may output a signal to the motor control device instructing regenerative braking by the motor while the electrically assisted bicycle is being pushed, and the motor control device may be controlled in accordance with the signal to actually perform regenerative braking by the motor.

[0065] 14 shows the relationship between the main body 321 of the seating prevention structure 320 and the motor control device 102. The motor control device 102 is the same as the motor control device 102 in the first embodiment. The operation panel 106, the battery 101, and the motor 105 are also the same as those in the first embodiment.

[0066] The main body 321 has a lock detection unit 362 that detects the two locks mentioned above, a slide detection unit 363 that detects the forward slide and backward slide mentioned above, an unlock detection unit 364 that detects when the unlock button is pressed, and a state detection unit 361 that detects the state of the seating prevention structure 320 based on the outputs from the lock detection unit 362, the slide detection unit 363, and the unlock detection unit 364.

[0067] When the lock detection unit 362 detects the two locks described above, the state detection unit 361 detects that the state has transitioned from the initial state to the unfolded state. At this time, the state detection unit 361 may output a signal to the motor control device 102 indicating that at least power drive by the motor is permitted while the power-assisted bicycle is being pushed. As described above, if the seat-prevention structure 320 only has the function of preventing the user from sitting on the bicycle, by outputting such a signal to the motor control device 102, the motor control device 102 will determine that the power-assisted bicycle is ready to be pushed, and will control the motor 105 to perform power drive when a push-walk instruction button provided on the operation panel 106, for example, is pressed.

[0068] Furthermore, after detecting that the bicycle has transitioned to the unfolded state, if the slide detection unit 363 detects a forward slide, the state detection unit 361 outputs a signal to the motor control device 102 instructing the motor to power the bicycle. In response to this signal, the motor control device 102 controls the motor 105 to power the bicycle. Note that the speed of the electrically assisted bicycle must be below a predetermined speed.

[0069] Furthermore, after detecting a transition to the deployed state, when the slide detection unit 363 detects a rearward slide, the state detection unit 361 outputs a signal instructing regenerative braking by the motor to the motor control device 102. In response to such a signal, the motor control device 102 controls the motor 105 to perform regenerative braking.

[0070] As described above, unless the user pushes the rod-shaped member 323a to slide it forward, the rod-shaped member 323a returns to the standby position. Therefore, when the slide detection unit 363 detects that the member 323 has returned to the standby position, the state detection unit 361 stops outputting the signal instructing the motor to perform power driving or the signal instructing the motor to perform regenerative braking.

[0071] Furthermore, when the lock release detection unit 364 detects that the lock release button or the like has been pressed, the state detection unit 361 stops outputting a signal indicating that at least power driving by the motor is permitted while the electrically assisted bicycle is being pushed. As a result, no assistance is provided even while the electrically assisted bicycle is being pushed.

[0072] The connection between the seating prevention structure 320 and the power-assisted bicycle 1 or the bicycle locking mechanism is the same as in the first embodiment, so a description thereof will be omitted.

[0073] In this embodiment, for example, rod-shaped member 323a is slid only horizontally, such as forward or backward, which provides high stability to the electrically assisted bicycle when being pushed along. Although the handlebars may sway left and right around the head tube as an axis, member 323 moves only horizontally, so operating member 323 does not cause or amplify the handlebar sway.

[0074] [Embodiment 3] FIG. 15A shows a schematic side view of the seating-prevention structure 420 according to this embodiment in its initial state. The seating-prevention structure 420 includes a main body 421, a flat, rod-shaped first member 422, a flat, rod-shaped second member 423 provided below the first member 422, a flat, rod-shaped third member 424 provided below the second member 423, and a planar member 425. The main body 421 is attached to the seat tube 203. The third member 424 is integrated with the planar member 425 and is rotatable around an axis 4211 in the main body 421. The first member 422, together with the second member 423, functions to limit the rotation of the third member 424 and the planar member 425 and to support them in the unfolded state. This function will be described later with reference to the accompanying drawings. Although not shown in FIG. 15A, if the frame 204 has a top tube 205, the first member 422 may be suspended from the top tube 205 so as to be slidable parallel to the top tube 205.

[0075] 15B shows a schematic front view of the seating-prevention structure 420 in its initial state, as seen from the front side of the saddle 201. As will be shown in later figures, the first member 422, the second member 423, and the third member 424 have a groove-like structure cut in their central portions, so that the planar member 425 is connected, for example, at the right end of the third member 424. The planar member 425 is approximately parallel to the plane formed by the frame 204.

[0076] 16A shows a schematic front view of the seating prevention structure 420 in the deployed state, as seen from the front side of the saddle 201. The third member 424 and the planar member 425 rotate around the axis 4211 so as to extend to the right side of the saddle 201. Specifically, they are rotated so as to form an angle of approximately 90° with the direction of travel (upward on the page). The position of the first member 422 remains unchanged, but the second member 423 moves horizontally as the third member 424 rotates.

[0077] 16B shows an outline of the top surface of the first member 422, the second member 423, and the third member 424 in the unfolded state. Note that the disk-shaped fourth member 426 is integrated with the first member 422, for example, on the upper side of the first member 422, and supports the first member 422 within the main body 421. A guide hole 4221 is formed in the first member 422 near the end on the traveling direction side. Meanwhile, a pin 4231 is inserted through the guide hole 4221 near one end of the second member 423 provided below the first member 422, and the movement direction and movement distance of the one end portion of the second member 423 are limited by the guide hole 4221.

[0078] Meanwhile, a guide hole 4241 is also formed in the third member 424. A pin 4232 is also inserted through the guide hole 4221 near the other end of the second member 423 provided above the third member 424, and the movement direction and movement distance of the other end portion of the second member 423 are limited by the guide hole 4241.

[0079] 16B, when the tip of third member 424 on the traveling direction side is rotated counterclockwise by approximately 90°, third member 424 is pulled out so as to extend to the side of saddle 201 when viewed from above, and when locked, it is in the unfolded state. Note that guide holes 4221 and 4241 are preferably shaped so that second member 423 and third member 424 are fixed in place in the unfolded state.

[0080] In this unfolded state, even if a person can sit on saddle 201, seating prevention structure 420 prevents the person from putting their feet down in a normal position, effectively preventing them from sitting on saddle 201. Furthermore, in this unfolded state, not only third member 424 and fourth member 426 extending horizontally to the sides of saddle 201, but also second member 423 function to prevent a person from sitting on saddle 201. Furthermore, third member 424 is a member that the user pushes with, for example, their hands or hips. Below, it will be described that third member 424 is used to command assist when slid in the forward direction of the power-assisted bicycle, and to command regenerative braking when pulled in the reverse direction. However, even if such implementation is not performed, if the user holds third member 424 in their hands and pushes the power-assisted bicycle in the unfolded state, the user can stably support and push the power-assisted bicycle while walking.

[0081] When returning from the expanded state to the initial state, as in the first embodiment, the lock can be released by pressing the unlock button (not shown), and the third member 424 can be rotated clockwise by approximately 90°, for example.

[0082] Next, the operation of the seating-prevention structure 420 when it is also used as an operating unit for issuing an instruction for assistance while pushing the power-assisted bicycle will be described with reference to FIG.

[0083] FIG. 17 shows an outline of the top view of the first member 422, the second member 423, and the third member 424 in the unfolded state. In this embodiment, the first member 422, the second member 423, the third member 424, the planar member 425, and the fourth member 426 can be slid forward in the unfolded state. That is, when the user pushes the third member 424, for example, from the initial position (also called the standby position) indicated by the dotted line in the direction of travel of the power-assisted bicycle, sliding it forward by a length L (e.g., 1 to 50 mm), this commands powered driving. Note that forward sliding represents the positive direction. For example, if the user does not push the third member 424, the third member 424 and the like are automatically returned to their initial positions by a mechanism such as a spring. This mechanism prevents powered driving when the bicycle is simply unfolded, and powered driving is stopped when the user moves away from the power-assisted bicycle in the unfolded state.

[0084] Furthermore, the seating-prevention structure 420 according to this embodiment can also be used as an operating unit for issuing a brake command while pushing the power-assisted bicycle. The operation in this case will be described with reference to FIG.

[0085] FIG. 18 shows an outline of the top view of the first member 422, the second member 423, and the third member 424 in the unfolded state. In this embodiment, the first member 422, the second member 423, the third member 424, the planar member 425, and the fourth member 426 can be slid rearward in the unfolded state. That is, when the user pulls the third member 424, for example, from the initial position (standby position) indicated by the dotted line in the direction of backward movement of the power-assisted bicycle, and slides it rearward by a length L (e.g., 1 to 50 mm), this signals regenerative braking. When the user does not pull the third member 424, for example, the third member 424 and the like are automatically returned to their initial positions by a mechanism such as a spring. With this mechanism, regenerative braking is not performed simply by the unfolded state, and power driving and regenerative braking are stopped when the user moves away from the power-assisted bicycle in the unfolded state.

[0086] 6 and 7 in the first embodiment, the user's posture when pushing the power-assisted bicycle is roughly the same, for example, holding the left handle with the left hand and pushing or pulling the third member 424 with the right hand. When gripping the handle with both hands, the user may also push the third member 424 with their waist.

[0087] As described above, the seating prevention structure 420 according to this embodiment not only functions to prevent the user from sitting down by transitioning from the initial state to the deployed state, but also functions as an operation unit for issuing instructions to the motor control device to execute powered driving by the motor and to execute regenerative braking while the user is pushing the vehicle. However, it may also be configured so that only instructions to execute powered driving can be issued.

[0088] The seating prevention structure 420 according to this embodiment is designed to be added to a general power-assisted bicycle, so there is no need to prepare a special saddle or the like.

[0089] Even in cases where the only function is to prevent the user from sitting down, when it is detected that the bicycle has been deployed, a circuit or the like built into the main body 421 may output a signal to the motor control device of the electrically assisted bicycle indicating that at least powered driving by the motor is permitted while the bicycle is being pushed, and further, when a push-walk instruction button or the like provided on the operation panel is pressed, the motor control device may actually control the motor to power driving.

[0090] Furthermore, if the seating prevention structure 420 is also made to function as an operating unit, after detecting that it has entered the deployed state, when an instruction to power drive is given as shown in Figure 17, a circuit or the like built into the main body 421 may output a signal to the motor control device instructing it to power drive using the motor while the electrically assisted bicycle is being pushed, and the motor control device may be controlled in accordance with this signal to actually power drive using the motor.

[0091] Furthermore, if the seating prevention structure 420 is also made to function as an operating unit, after detecting that it has entered the deployed state and a command to perform regenerative braking is given, a circuit or the like built into the main body 421 may output a signal to the motor control device instructing regenerative braking by the motor while the electrically assisted bicycle is being pushed, and the motor control device may be controlled in accordance with the signal to actually perform regenerative braking by the motor.

[0092] The functional configuration of the main body 421 of the seating prevention structure 420 is the same as that shown in Fig. 14 in the second embodiment. Therefore, although a description thereof will be omitted, in the present embodiment, the lock detection unit 362 detects the lock described above in the present embodiment.

[0093] Note that unless the user pushes the third member 424 so as to slide it forward, the third member 424 and the like return to the standby position. Therefore, when the slide detection unit 363 detects that the third member 424 and the like have returned to the standby position, the state detection unit 361 stops outputting the signal instructing power driving by the motor or the signal instructing regenerative braking by the motor.

[0094] The connection between the seating prevention structure 420 and the power-assisted bicycle 1 or the bicycle locking mechanism is the same as in the first embodiment, so a description thereof will be omitted.

[0095] In this embodiment, for example, the third member 424 and the like are slid only in the horizontal direction, such as forward or backward, which makes the power-assisted bicycle highly stable when being pushed along. Although the handlebars may sway left and right around the head tube as an axis, because the third member 424 and the like only move in the horizontal direction, operating the third member 424 and the like does not cause or amplify the handlebar wobble.

[0096] [Embodiment 4] FIG. 19A shows a schematic side view of the seat-prevention structure 540 according to this embodiment in its initial state. The seat-prevention structure 540 includes a main body 541, a first member 542, and a second member 543. The main body 541 is attached, for example, by being wrapped around the seat tube 203 and has a cylindrical rotating portion 5411 that rotates around the seat tube 203. The rotating portion 5411 is connected to one end of the first member 542, and the other end of the first member 542 is connected to the second member 543. The first member 542 has a fixed length, but the second member 543 is extendable and contracted to its shortest position in the initial state and can be extended when in the unfolded state. In this embodiment, the seat tube 203 is tilted at an angle, but in the initial state, the first member 542 and the second member 543 are parallel to the ground and face backward.

[0097] FIG. 19B shows an outline of the seating prevention structure 540 in its initial state, as seen from above the power-assisted bicycle. In the initial state, a first member 542 and a second member 543 extend backward from under the saddle 201. As shown in FIG. 19B, the second member 543 is a member that has a relatively large area and width when viewed from above. In this embodiment, as can be seen in the following diagrams, a protrusion protrudes from below in area A or B near the side of the saddle 201, where the user's thighs would be placed when seated, to prevent the user from sitting. Areas A and B are located on the sides of the tapered portion of the saddle 201 in the forward direction, and are roughly elliptical areas with a width of 10 to 20 cm and a center approximately 5 to 15 cm laterally from the center line of the saddle 201.

[0098] Next, Figure 20A shows an outline of the top view of seating-prevention structure 540 as it is being unfolded, as seen from above the power-assisted bicycle. As shown in Figure 20A, from the initial state, rotating portion 5411 is rotated around seat tube 203 by a predetermined angle θ that is greater than 90° and less than 180° as seen from above the power-assisted bicycle, so that first member 542 and second member 543 are directed toward area A near the side of saddle 201. The predetermined angle θ is set in advance to an appropriate angle for area A or B. In this embodiment, the first lock is engaged when the structure has been rotated by the predetermined angle θ.

[0099] 20B shows a schematic side view of seating-prevention structure 540 in the process of unfolding. In this embodiment, seat tube 203 is tilted at an angle, and rotating portion 5411 rotates around seat tube 203, so that first member 542 and second member 543, which are initially parallel to the ground, face diagonally upward when rotated by the above-mentioned predetermined angle θ.

[0100] In this state, when the user pulls the second member 543 diagonally upward, the seating-prevention structure 540 in the unfolded state is obtained, as shown in FIG. 21A. FIG. 21A is a diagram showing an outline of a side view, in which the third member 5431 and the fourth member 5432 provided inside the second member 543 are pulled out, and the second member 543, the third member 5431, and the fourth member 5432 cover the area A near the side of the saddle 201 by pushing up from below. Note that in this figure, the third member 5431 and the fourth member 5432 are pulled out from the second member 543 in two stages to extend its length, but the size of the second member 543 may be adjusted and the second member 543 may be extended in one stage or three or more stages to transition to the unfolded state. Note that, as shown in FIG. 21A, the second lock is engaged when the second member 543 is extended.

[0101] 21B shows an outline of the top view of the seating-prevention structure 540 in the deployed state. Even when viewed from above, it can be seen that the third member 5431 and the fourth member 5432 are pulled out from the second member 543 and deployed to cover most of the area A near the side of the saddle 201.

[0102] In this unfolded state, even if the user is able to sit on saddle 201, seating prevention structure 540 prevents the user from putting their feet down in a normal position, effectively preventing the user from sitting on saddle 201. Furthermore, second member 543 is a member that the user pushes with, for example, their hand. Below, it will be explained that second member 543 is used to command assist when it is slid toward the ground along seat tube 203, and to command regenerative braking when it is pulled upward along seat tube 203, but even if this implementation is not used, if the user holds second member 543 with their hand in the unfolded state and pushes the power-assisted bicycle while walking, the user can stably support the power-assisted bicycle and push it while walking.

[0103] When returning from the expanded state to the initial state, as in the first embodiment, the lock is released by pressing the unlock button (not shown), and the fourth member 5431 and the fifth member 5432 are stored in the third member 543, and the rotating part 5411 is rotated in the opposite direction by a predetermined angle θ so that the third member 543 faces in the backward direction.

[0104] Next, the operation of the seating-prevention structure 540 when it is also used as an operating unit for issuing an instruction for assistance while pushing the power-assisted bicycle will be described with reference to FIG.

[0105] FIG. 22 shows a simplified side view of the seating-prevention structure 540 for explaining operation in the unfolded state. In this embodiment, the user can slide the second member 543 toward the ground along the seat tube 203. When the second member 543 is slid toward the ground, the rotating unit 5411, which is connected via the first member 542, is pushed downward from the initial position (also called the standby position) indicated by the dotted line by a length L (e.g., 1 to 50 mm) toward the ground, which commands powered driving. Note that sliding toward the ground (also called a downward slide) represents the positive direction. For example, if the user does not push the second member 543, the rotating unit 5411 is automatically returned to its initial position by a mechanism such as a spring. This mechanism prevents powered driving when the bicycle is simply unfolded, and powered driving is stopped when the user moves away from the electric assist bicycle in the unfolded state.

[0106] The seating-prevention structure 540 according to this embodiment can also be used as an operating unit for issuing a brake command while pushing the power-assisted bicycle. The operation in this case will be described with reference to FIG.

[0107] FIG. 23 shows a simplified side view of the seating prevention structure 540 for explaining operation in the unfolded state. In this embodiment, the user can slide the second member 543 upward along the seat tube 203. When the second member 543 is slid upward, the rotating portion 5411 connected via the first member 542 is pulled upward by a length −L (e.g., 1 to 50 mm) from the initial position (standby position) indicated by the dotted line, which indicates regenerative braking. An upward slide is also referred to as an upward slide. For example, if the user does not pull up the second member 543, the rotating portion 5411 is automatically returned to its initial position by a mechanism such as a spring. This mechanism prevents regenerative braking from occurring simply by the unfolded state. However, if the user moves away from the electrically assisted bicycle in the unfolded state, power driving and regenerative braking are stopped.

[0108] In the first embodiment, the user's posture when pushing the electrically assisted bicycle as shown in Figures 6 and 7 is roughly the same, for example, holding the left handle with the left hand and pushing or pulling the second member 543 etc. with the right hand.

[0109] As described above, the seating prevention structure 540 according to this embodiment not only functions to prevent the user from sitting down by transitioning from the initial state to the deployed state, but also functions as an operation unit for issuing instructions to the motor control device to execute powered driving by the motor and to execute regenerative braking while the user is pushing the vehicle. However, it may also be configured so that only instructions to execute powered driving can be issued.

[0110] The seating prevention structure 540 according to this embodiment is designed to be added to a general power-assisted bicycle, so there is no need to prepare a special saddle or the like.

[0111] Even in cases where the only function is to prevent the user from sitting down, when it is detected that the bicycle has been deployed, a circuit or the like built into main body 541 may output a signal to the motor control device of the electrically assisted bicycle indicating that at least powered driving by the motor is permitted while the bicycle is being pushed, and further, when a push-walk instruction button or the like provided on the operation panel is pressed, the motor control device may actually control the motor to power driving.

[0112] Furthermore, if the seating prevention structure 540 is also made to function as an operating unit, after detecting that it has entered the deployed state, when a command to power drive is given as shown in Figure 22, a circuit or the like built into the main body 541 may output a signal to the motor control device instructing it to power drive using the motor while the electrically assisted bicycle is being pushed, and the motor control device may be controlled in accordance with this signal to actually power drive using the motor.

[0113] Furthermore, if the seating prevention structure 540 is also made to function as an operating unit, after detecting that it has entered the deployed state and a command to perform regenerative braking is given, a circuit or the like built into the main body 541 may output a signal to the motor control device instructing regenerative braking by the motor while the electrically assisted bicycle is being pushed, and the motor control device may be controlled in accordance with the signal to actually perform regenerative braking by the motor.

[0114] 24 shows the relationship between the main body 541 of the seating prevention structure 540 and the motor control device 102, etc. The motor control device 102 has a function to control at least power driving by the motor 105, and in this embodiment, it controls at least power driving so that the speed is below a predetermined speed while the electrically assisted bicycle is being pushed. The motor control device 102 may also have a function to control regenerative braking by the motor, and in that case, in this embodiment, regenerative braking is performed while the electrically assisted bicycle is being pushed. An operation panel 106 is connected to the motor control device 102, and a power switch provided on the operation panel 106 is used to supply power from the battery 101 to the motor control device 102, motor 105, etc.

[0115] The main body 541 has an angle sensor 562 that detects the rotation angle of the rotation axis of the rotating part 5411, a lock detection part 563 that detects the lock caused by the third member 5431 and the fourth member 5432 being pulled out from the second member 543, a slide detection part 564 that detects the downward slide and upward slide mentioned above, an unlock detection part 565 that detects when an unlock button or the like is pressed, and a state detection part 561 that detects the state of the seating prevention structure 540 based on the outputs from the angle sensor 562, the lock detection part 563, the slide detection part 564 and the unlock detection part 565.

[0116] The state detection unit 561 detects that the state has transitioned from the initial state to the unfolded state when the angle sensor 562 detects that the rotating unit 5411 has rotated a predetermined angle θ and the lock detection unit 563 detects that the second member 543 or the like has been locked. At this time, the state detection unit 561 may be configured to output a signal to the motor control device 102 indicating that at least power driving by the motor is permitted while the power-assisted bicycle is being pushed. As described above, if the seat-prevention structure 540 only has the function of preventing the user from sitting on the bicycle, by outputting such a signal to the motor control device 102, the motor control device 102 determines that the power-assisted bicycle is ready to be pushed, and controls the motor 105 to perform power driving when a push-walk instruction button provided on the operation panel 106 or the like is pressed, for example.

[0117] Furthermore, after detecting that the bicycle has transitioned to the unfolded state, when the slide detection unit 564 detects a downward slide, the state detection unit 561 outputs a signal to the motor control device 102 instructing the motor 105 to power the bicycle. In response to this signal, the motor control device 102 controls the motor 105 to power the bicycle. Note that the speed of the electrically assisted bicycle must be equal to or less than a predetermined speed.

[0118] Furthermore, after detecting a transition to the deployed state, when the slide detection unit 564 detects an upward slide, the state detection unit 561 outputs a signal to the motor control device 102 instructing regenerative braking by the motor 105. In response to such a signal, the motor control device 102 controls the motor 105 to perform regenerative braking.

[0119] As described above, the rotating unit 5411 returns to its initial position unless the second member 543 is pushed toward the ground or pulled upward. Therefore, when the slide detection unit 564 reaches a state where it detects neither a downward slide nor an upward slide, the state detection unit 561 stops outputting a signal instructing the motor 105 to perform power driving or a signal instructing the motor 105 to perform regenerative braking.

[0120] Furthermore, when the lock release detection unit 565 detects that the lock release button or the like has been pressed, the state detection unit 561 stops outputting a signal indicating that at least power driving by the motor 105 is permitted while the electrically assisted bicycle is being pushed and walked. As a result, no assistance is provided even while the electrically assisted bicycle is being pushed and walked.

[0121] The seating prevention structure 540 can be linked to the locking mechanism of the power-assisted bicycle or bicycle to enhance the level of theft prevention, as in the first embodiment.

[0122] In this embodiment, only the downward and upward sliding motions described above are possible in the unfolded state, providing high stability for the electrically assisted bicycle while being pushed along. The handlebars may sway left and right around the head tube. However, as shown schematically in FIG. 25, adopting a structure in which the tip of bar X rotates back and forth around a single point Y may result in the handlebars swaying or even amplify the swaying motion. By adopting downward and upward sliding motions as in this embodiment, such problems are avoided. While the embodiments of the present invention have been described above, the present invention is not limited thereto. For example, depending on the purpose, any technical feature in each of the above-described embodiments may be omitted, or any technical feature described in another embodiment may be added.

[0123] In the second and third embodiments, a forward slide and a backward slide are used, but an upward slide and a downward slide may be used as in the fourth embodiment. In the first embodiment, a power driving command and a regenerative braking command are detected in response to the rotation of the rotating part 2211, but an upward slide and a downward slide may be used as in the fourth embodiment.

[0124] Furthermore, the functional block diagram described above is an example, and one functional block may be divided into multiple functional blocks, or multiple functional blocks may be integrated into one functional block. For example, the state detection unit may be provided within the motor control device.

[0125] The above-described embodiment can be summarized as follows.

[0126] The seat in this embodiment is a structure that can be attached to the frame or seat post of a bicycle and can be switched between an initial state in which the user is not prevented from sitting on the bicycle saddle by operating it, and an expanded state in which the seat is mechanically expanded at least to the side of the saddle or near the side of the saddle when viewed from above the bicycle so as to prevent the user from sitting on the saddle.

[0127] The device is attached to the bicycle frame or seat post and is mechanically deployed at least to the side of the saddle when viewed from above the bicycle, or mechanically deployed near the side of the saddle, so that seating prevention can be performed without modifying the saddle.

[0128] If the bicycle described above is an electrically assisted bicycle, the bicycle may include a detection unit that, when it transitions to the unfolded state, outputs a signal to the motor control unit of the electrically assisted bicycle indicating that at least power drive by the motor of the electrically assisted bicycle is permitted while the bicycle is being pushed. If the bicycle transitions to the unfolded state and seating is prevented, power drive may be performed while the bicycle is being pushed, so by notifying the motor control unit of the transition to the unfolded state, the motor control unit can enable power drive in response to, for example, a separately provided push-walk instruction button.

[0129] On the other hand, if the bicycle described above is an electric assist bicycle, the seating prevention structure may have, in the unfolded state, an operation unit that receives from the user an instruction to power the motor of the electric assist bicycle, and a detection unit that, when the operation unit receives the instruction to power, outputs a first signal to the motor control device of the electric assist bicycle instructing it to power the motor while the electric assist bicycle is being pushed.The seating prevention structure may not only prevent seating, but also be able to instruct the motor control device to power the bicycle.

[0130] Furthermore, the above-mentioned operation unit may be configured to further receive an instruction from the user to execute a braking operation using the motor when in the unfolded state. In this case, when the operation unit receives an instruction to execute a braking operation, the above-mentioned detection unit may be configured to output a second signal to the motor control device instructing the motor to execute a braking operation while the electrically assisted bicycle is being pushed. An electrically assisted bicycle with a regenerative function that can instruct the motor control device to execute a braking operation is useful when going downhill, for example.

[0131] In addition, the above-mentioned operating unit may be able to slide from its initial position in the unfolded state in the direction of travel of the electrically assisted bicycle or downward, or rotate in the direction of travel around a rotation axis perpendicular to the direction of travel and the ground. In this case, the above-mentioned detection unit may be configured to output a first signal when, in the unfolded state, the operating unit is slid from its initial position in the direction of travel of the electrically assisted bicycle or downward, or rotated in the direction of travel around the rotation axis. This allows the user to push the electrically assisted bicycle stably and easily, and makes it easy to instruct assistance. In addition, a mechanism that automatically returns to its initial position when there is no user operation is preferable.

[0132] Furthermore, in the unfolded state, the above-described operating unit may be able to slide from its initial position in the unfolded state in a direction opposite to the backward or downward direction of the electrically assisted bicycle, or to rotate in the backward direction around a rotation axis perpendicular to the forward direction and the ground. In this case, the above-described detection unit may be configured to output a second signal when, in the unfolded state, the operating unit is slid from its initial position in an upward direction opposite to the backward or downward direction of the electrically assisted bicycle, or rotated in the backward direction around the rotation axis. This allows the user to push the electrically assisted bicycle stably and easily, even on downhill slopes, and makes it easy to issue a brake command. A mechanism that automatically returns to its initial position when there is no user operation is preferable.

[0133] The seat-preventing structure described above may have a first member that can rotate about a rotation axis that is perpendicular to the direction of travel of the bicycle and the ground, and may be configured to assume the unfolded state described above when an end of the first member is in a predetermined position facing the saddle. More specifically, as in the first embodiment, the seat-preventing structure described above may have (a) a first member that can rotate about a rotation axis that is perpendicular to the direction of travel of the bicycle and the ground, (b) a second member that is connected to the first member and that can be moved between a first state in which it is folded along the first member and a second state in which it is opened so as to form a first predetermined angle (e.g., 90°) with respect to the first member, and (c) a third member that has one end connected to the second member so as to form a second predetermined angle with respect to the second member. Then, when the second member is connected, the first member is rotated to a predetermined third angle so that the end of the first member faces the saddle, and the second member is in the second state, the unfolded state described above may be achieved.

[0134] Furthermore, if the bicycle described above is an electrically assisted bicycle, the bicycle may further have a detection unit which, upon detecting a transition to the unfolded state, outputs a signal to the motor control device of the electrically assisted bicycle indicating that at least power drive by the motor of the electrically assisted bicycle is permitted while the electrically assisted bicycle is being pushed, or which, upon detecting a transition to the unfolded state, outputs a signal to the motor control device instructing power drive by the motor while the electrically assisted bicycle is being pushed.

[0135] Furthermore, after detecting that the electric assist bicycle has transitioned to the deployed state, if the detection unit detects that the first member has been rotated in the backward direction of the electric assist bicycle, it may output a signal to the motor control device instructing the motor to perform a braking operation while the electric assist bicycle is being pushed.

[0136] Also, as in the second embodiment, the seating prevention structure may have one end connected to the seat tube or seat post of the bicycle frame, and the other end may be lifted so that it faces the side of the bicycle when viewed from above, and then moved so that it faces the other side of the bicycle in an arc centered near the one end, thereby having a member that can unfold a fan-shaped cover in front of the saddle.

[0137] If the bicycle is an electrically assisted bicycle, the member may be configured to be slidable near the one end in the direction of travel of the electrically assisted bicycle. In this case, the bicycle may further include a detection unit that, upon detecting that the member has slid in the direction of travel of the electrically assisted bicycle after detecting that the bicycle has transitioned to the unfolded state, outputs a signal to the motor control device instructing the motor to power the bicycle while the bicycle is being pushed.

[0138] The member may also be configured to be slidable near the one end in the reverse direction of the electrically assisted bicycle. In this case, when the detector detects that the member has been rotated in the reverse direction of the electrically assisted bicycle after detecting that the member has transitioned to the deployed state, it may output a signal to the motor control device instructing the motor to apply the brakes while the electrically assisted bicycle is being pushed.

[0139] Furthermore, as in the third embodiment, the seating prevention structure may have a planar member that can rotate around a predetermined axis from an initial state in which it is parallel to the bicycle frame to an expanded state in which it faces the side of the saddle when viewed from above the bicycle.

[0140] If the bicycle is an electrically assisted bicycle, the planar member may be configured to be slidable in the direction of travel of the electrically assisted bicycle. In this case, the seating prevention structure may further include a detection unit that, after detecting that it has transitioned to the unfolded state, detects that the planar member has been slid in the direction of travel of the electrically assisted bicycle, outputs a signal to the motor control device instructing the motor to power the bicycle while the bicycle is being pushed.

[0141] Furthermore, the seating prevention structure may be configured so that the planar member can slide in the backward direction of the electric assist bicycle, and in this case, after detecting that the planar member has been slid in the backward direction of the electric assist bicycle after detecting that it has transitioned to the unfolded state, the detection unit may output a signal to the motor control device instructing the motor to brake while the electric assist bicycle is being pushed.

[0142] Furthermore, as in the fourth embodiment, the seating-prevention structure may have one end connected to a frame tube or the vicinity of the seat post of the bicycle frame, and the other end rotatable from behind the saddle as viewed from above the bicycle and having an extendable member. In this case, the deployed state is achieved by rotating the other end from behind the saddle to near the side of the saddle as viewed from above the bicycle, and extending the member to its maximum extent.

[0143] If the bicycle is an electrically assisted bicycle, the seat-prevention structure may be configured to allow the member to slide downward near one end of the member when in the unfolded state. In this case, the seat-prevention structure may further have a detection unit that, when it detects that the member has slid downward after detecting that the bicycle has transitioned to the unfolded state, outputs a signal to the motor control device instructing the motor to power the bicycle while the bicycle is being pushed. Furthermore, the seating prevention structure may be configured such that, in the unfolded state, the member can be slid upward, opposite to the downward direction, near one end of the member. In this case, when the detection unit detects that the member has been slid upward, opposite to the downward direction, after detecting that the unfolded state has been reached, it may output a signal to the motor control device instructing the motor to apply the brakes while the electrically assisted bicycle is being pushed. [Explanation of symbols]

[0144] 101 Battery 102 Motor control device 106 Operation Panel

Claims

1. It can be attached to the bicycle frame or seat post, The bicycle seat can be operated by a user to switch between an initial state in which the user is not prevented from sitting on the bicycle saddle and a deployed state in which the bicycle seat is mechanically deployed at least to the side of the saddle or near the side of the saddle when viewed from above the bicycle so as to prevent the user from sitting on the saddle, a first member that is rotatable about a rotation axis that is perpendicular to the direction of travel of the bicycle and the direction of the ground; a second member connected to the first member and capable of transitioning between a first state in which the second member is folded along the first member and a second state in which the second member is opened to form a first predetermined angle with respect to the first member; and The rotation axis is provided below the saddle, The deployed state is achieved when the first member is rotated from the initial state in which the end of the first member connected to the second member faces downward of the bicycle, via a state in which the end of the first member faces in the direction of travel of the bicycle, so that the end of the first member faces upward of the bicycle, and the second member is in the second state. Seating prevention structure.

2. The bicycle is an electrically assisted bicycle, and a detection unit that, when the state shifts to the unfolded state, outputs a signal to a motor control device of the electrically assisted bicycle indicating that at least power driving by the motor of the electrically assisted bicycle is permitted while the electrically assisted bicycle is being pushed and walked. The seating prevention structure according to claim 1.

3. The bicycle is an electrically assisted bicycle, the first member and the second member are an operation unit that receives an instruction from a user to perform power driving using a motor of the electrically assisted bicycle when the first member and the second member are in the unfolded state, a detection section that, when the operation section receives the instruction to perform power driving, outputs a first signal to a motor control device of the electrically assisted bicycle, instructing the motor to perform power driving while the electrically assisted bicycle is being pushed and walked; The seating prevention structure according to claim 1, comprising:

4. the operation unit further receives, in the deployed state, an instruction from a user to execute a braking operation by the motor; When the operation unit receives an instruction to perform the braking operation, the detection unit outputs a second signal to the motor control device instructing the motor to perform a braking operation while the electrically assisted bicycle is being pushed and walked. The seating prevention structure according to claim 3.

5. The operation unit includes: In the unfolded state, the bicycle can be rotated around the rotation axis from an initial position in the unfolded state toward the direction of travel of the electrically assisted bicycle, The detection unit In the deployed state, when the operating unit is rotated from the initial position around the rotation axis toward the traveling direction, the first signal is output. The seating prevention structure according to claim 3.

6. The operation unit includes: In the unfolded state, the handle can be rotated around the rotation axis in the backward direction of the electrically assisted bicycle from an initial position in the unfolded state, The detection unit In the deployed state, when the operating unit is rotated from the initial position around the rotation axis toward the rearward direction, the second signal is output.

5. The seating prevention structure according to claim 4.

7. It can be attached to the bicycle frame or seat post, The bicycle seat can be operated by a user to switch between an initial state in which the user is not prevented from sitting on the bicycle saddle and a deployed state in which the bicycle seat is mechanically deployed at least to the side of the saddle or near the side of the saddle when viewed from above the bicycle so as to prevent the user from sitting on the saddle, A member having one end connected to the seat tube or the vicinity of the seat post of the bicycle frame, and capable of unfolding a fan-shaped cover in front of the saddle by lifting the other end so that it faces the side of the bicycle when viewed from above, and then moving it so that it faces the other side of the bicycle in an arc centered around the vicinity of the one end. A structure for preventing seating.

8. The bicycle is an electrically assisted bicycle, the member is configured to be slidable in the direction of travel of the electric assist bicycle near the one end, a detection section that, when detecting that the member has been slid in the direction of travel of the electrically assisted bicycle after detecting that the member has transitioned to the unfolded state, outputs a signal to a motor control device of the electrically assisted bicycle instructing the motor of the electrically assisted bicycle to be powered while the electrically assisted bicycle is being pushed and walked; 8. The seating prevention structure according to claim 7, further comprising:

9. the member is configured to be slidable in the vicinity of the one end in a backward direction of the electrically assisted bicycle, The detection unit When it is detected that the member has been rotated in the backward direction of the electrically assisted bicycle after detecting that the bicycle has transitioned to the unfolded state, a signal is output to the motor control device to instruct the motor to perform a braking operation while the electrically assisted bicycle is being pushed. The seating prevention structure according to claim 8.

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