JP2015009671A - Bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a storage member from being directly subjected to an external force.SOLUTION: A second frame 10b, which is extended backward from a first frame 10a fitted with a front wheel 20, is provided with opposed pieces 57 and 57 that are integrally provided. The second frame 10b is formed of the second frame 10b and the opposed pieces 57 and 57.

Description

  The present invention relates to a bicycle.

  The electric assist bicycle supplies electric power to an electric power motor, for example, an auxiliary power output unit having a detecting means for detecting a pedaling force and an electric motor for outputting auxiliary power, an operation switch unit for performing various operations, and the like. The bicycle includes an electric assist unit including a battery unit and the like, and assists human power with an electric motor or the like (see Patent Documents 1 to 3). Furthermore, in an electric assist bicycle, generally, an auxiliary power output portion is disposed on a shaft support portion (bottom bracket shell) of a second frame extending rearward from a first frame to which a front wheel is attached. The part is arranged in a handle part attached to the first frame, and the battery part is arranged behind the seat tube of the second frame. Further, the auxiliary power output unit and the operation switch unit, and the auxiliary power output unit and the battery unit are electrically connected by an electric cord, respectively, and are connected by a connector for convenience in manufacturing and assembly.

  However, in the conventional electric assist bicycle, these electric cords are covered and protected by a protective tube such as a heat-shrinkable tube, and then fixed along the lower surface portion of the second frame by a band fixture. At this time, the connector is disposed in a state exposed to the appearance. Therefore, the connector is easily subjected to external force, and may be disconnected or damaged due to the external force.

Japanese Patent No. 4483090 Japanese Patent No. 4641627 JP 7-215264 A

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a bicycle capable of preventing the storage component from receiving external force directly.

  A bicycle according to the present invention includes opposing pieces integrally provided on a second frame extending rearward from a first frame to which a front wheel is attached, and the second frame includes the second frame. It has a space formed by a frame and the opposed pieces.

  Further, the opposing pieces may be provided on the lower surface portion of the second frame.

  Furthermore, a shaft support portion for supporting the crankshaft may be provided between the opposed pieces.

  Further, the space portion accommodates a connector that connects a motor that outputs auxiliary power for assisting the pedaling force, an operation unit that operates the motor, and / or a battery that supplies power to the motor. Anyway.

  The present invention provides a space in which a second frame extending rearward from a first frame to which a front wheel is attached is formed by a second frame and opposing pieces integrally provided on the second frame. For example, a connector that electrically connects the electric cord of the electric motor of the electric assist unit and the electric cord of the operation switch unit of the electric assist unit, or the electric cord of the electric motor and the electric assist unit of the electric assist unit. A storage component such as a connector for electrically connecting the electrical cord of the battery unit can be stored in the space, and the storage component can be prevented from receiving an external force directly.

It is the upper perspective view which showed the bicycle to which this invention is applied. It is the left view which showed the bicycle to which this invention is applied. It is the bottom perspective view showing the bicycle to which the present invention is applied. It is the rear view which showed the bicycle to which this invention is applied. It is the right view which showed the bicycle to which this invention is applied. It is the lower perspective view which showed the space part. 1 is a front view showing a bicycle to which the present invention is applied. 1 is a plan view showing a bicycle to which the present invention is applied. An electric assist unit is shown, (A) is a perspective view, (B) is a side view. It is the longitudinal cross-sectional view which showed the space part of 1st embodiment. It is the figure which showed a mode that the bicycle to which this invention was applied was parked in a bicycle parking lot, (A) is a top view, (B) is a side view. (A) is the left view which showed the bicycle of the reference example, (B) is the figure which showed a mode that the bicycle of a reference example drive | works an uphill slope, (C) shows this invention. It is the figure which showed a mode that the applied bicycle drive | works an uphill slope. It is the longitudinal cross-sectional view which showed the space part of 2nd embodiment. It is the longitudinal cross-sectional view which showed the space part of 3rd embodiment.

Hereinafter, a bicycle to which the present invention is applied will be described in detail with reference to the drawings. In addition, this invention is not limited to the following examples, It can change arbitrarily in the range which does not deviate from the summary of this invention.
1. 1. Explanation of bicycle according to the first embodiment 2. Description of the bicycle of the second embodiment 3. Explanation of bicycle according to the third embodiment Bicycle variations

<1. Description of Bicycle of First Embodiment>
As shown in FIG. 1, a bicycle 1 to which the present invention is applied is, for example, a bicycle having two front wheels and two rear wheels that can be used even by an elderly person or a person with a illness or disorder in the body. Furthermore, the bicycle 1 has a total of four wheels, including the front two wheels and the rear two wheels, and is grounded to the ground or the like when starting or stopping, which is particularly unstable with a two-wheel bicycle. However, it is a bicycle that has stability that is not easily toppled and has operability that can be easily operated.

  Specifically, as shown in FIG. 1, a bicycle 1 to which the present invention is applied has a main frame 10, twin front wheels 20, 20 provided on the lower front side of the main frame 10, and a rear side of the main frame 10. The two rear wheels 30 and 30 provided, the front of the main frame 10, the operation unit 40 for operating the front wheel 20, and the lower side of the main frame 10 are provided to assist the user's human power (stepping force). In addition, a drive unit 50 that drives the rear wheels 30 is provided.

<Mainframe>
As shown in FIG. 2, the main frame 10 includes a first main frame 10a to which the front wheels 20 are attached, and a second main frame 10b extending rearward from the first main frame 10a. The first main frame 10a is composed of a head tube 11 that is disposed vertically at the front end. The second main frame 10 b includes a main tube 14 that extends rearward from the head tube 11. The main tube 14 includes a curved down tube portion 12 joined to the head tube 11 and a linear back tube portion 13 provided on the rear side of the down tube portion 12. Further, the second main frame 10 b is provided on the down tube portion 12 side of the back tube portion 13, and the seat tube 15 erected while being inclined backward, and between the seat tube 15 and the back tube portion 13. And a battery holder 193 that is provided between the seat tube 15 and the back tube portion 13 and holds the battery portion 190 of the electric assist unit 160 of the drive unit 50 described later. The electric assist attachment tube 15b to which is attached. Further, as shown in FIGS. 3 and 4, the second main frame 10 b includes a pair of first reinforcing tubes 16 and 16 provided in an inverted V shape from the back tube portion 13 toward the rear. Rear tubes 17, 17 projecting inward from the end of the first reinforcing tube 16, and second reinforcing tubes 18, 18 provided between the rear tube 17 and the back tube portion 13, The loading plate mounting tube 19 is provided between the second reinforcing tube 18 and the back tube portion 13 to which the back loading plate 60 is attached. Further, as shown in FIG. 2, the head tube 11, the main tube 14 (down tube portion 12), and the seat tube 15 are provided so as to form a substantially U shape with these three parts, so that a user or the like gets on. It is an opening when straddling the foot and is secured largely.

  And as shown in FIG. 2, between the head tube 11 and the down tube part 12 of the main tube 14, between the back tube part 13 and the seat tube 15 of the main tube 14, the seat tube 15 and the sheet reinforcing tube 15a Between the seat reinforcing tube 15a and the back tube portion 13, between the seat tube 15 and the electric assist mounting tube 15b, between the electric assist mounting tube 15b and the back tube portion 13, and between the back tube portion 13 and the first tube. Between the second reinforcing tube 18, between the first reinforcing tube 16 and the rear tube 17, between the rear tube 17 and the second reinforcing tube 18, and between the second reinforcing tube 18 and the back tube portion 13. The space between the second reinforcing tube 18 and the loading platform mounting tube 19 is a conventionally known one such as welding. They are joined by either coupling methods.

  Further, as shown in FIG. 2, the head tube 11 is provided to be inclined with respect to the vertical so as to have a predetermined caster angle θ1. Here, the caster angle θ1 of the head tube 11 is provided so as to be, for example, 12 degrees to 26 degrees, preferably 15 degrees to 20 degrees with respect to the vertical. By turning the front wheel 20 into a twin wheel and providing a caster angle θ1, the handle 42 is cut from a straight traveling state, and when the predetermined angle is reached, one front wheel 20 is lifted, the operation load on the handle 42 is reduced, and the inner ring difference is also eliminated. The When the steering wheel turning angle is small (the turning radius is large), the difference between the inner wheels is not a problem. However, when the steering wheel turning angle is large (the rotation radius is small), a pair of left and right front wheels (wheels) 20 and 20 are caused by the inner wheel difference. There is a risk that a resistance will be generated and the vehicle will deviate from the intended travel line.

  As described above, the caster angle θ1 of the head tube 11 is set to be 12 degrees to 26 degrees with respect to the vertical. When the angle is smaller than 12 degrees, for example, an elderly person or the like continues a heavy load operation of the handle 42 when turning the handle 42, and when the angle is larger than 26 degrees, the floating amount of the front wheel 20 increases. The impact when the front wheels land on the road surface from the state in which the front wheels 20 are lifted increases, and the riding comfort is deteriorated.

Furthermore, by providing a caster angle, when the steering wheel 42 is turned from a straight traveling state, the direction of the tire changes and the vehicle body rises according to the angle, and the operating force applied to the steering wheel operation lifts the vehicle body in the direction that changes the tire direction. Distributed in the direction (vertical direction). By providing a caster angle when the vehicle stops due to this action, the steering wheel works to stabilize in a straight-ahead position. As the caster angle θ1 is increased, the float of the vehicle body is increased and the stability is increased. Considering the use of elderly people whose muscle strength has declined, it is preferable that the component force in the vertical direction is 50% or less of the force used to change the direction of the original tire by the operating force of the handle 42. From tan ⁻¹ (0.5) = 26.6 °, the caster angle is preferably 26 degrees or less.

  Further, a front loading platform 61 is attached to the outer peripheral portion of the head tube 11 toward the front. Further, an operation unit 40 is rotatably mounted in the head tube 11.

  Further, as shown in FIG. 2, the main tube 14 includes a curved down tube portion 12 joined to the head tube 11 and a linear back tube portion 13 provided on the rear side of the down tube portion 12. Have. The down tube portion 12 and the back tube portion 13 are provided by processing and molding a single hollow member, such as processing and molding a single round pipe or the like. Therefore, since the down tube portion 12 and the back tube portion 13 do not have a joint portion by welding or the like between them, there is no need to perform processing quality control of the joint portion, and the strength is stronger than when the joint portion is present. Further, since it is not necessary to perform joining processing such as welding, the cost can be reduced as compared with the case where joining processing such as welding is performed.

  Specifically, the down tube portion 12 is curved in a convex arc shape downward (ground). That is, the down tube portion 12 has an R shape and is bent at an obtuse angle. Furthermore, the down tube portion 12 has a downward slope portion 12a that descends so as to approach the ground from the front wheel 20 side toward the rear wheel 30 side, and an upward slope portion 12b that rises so as to be separated from the ground, From the front wheel 20 side toward the rear wheel 30 side, the descending slope portion 12a and the ascending slope portion 12b are successively formed. In addition, it is provided so that it may become the lowest ground level position 12c of the main tube 14 between the downward slope part 12a and the upward slope part 12b.

  Further, the ascending slope portion 12b is provided at a low height so that even an elderly person can easily get on and off without having to raise his / her foot, for example. For example, here, the height of the ascending slope portion 12b from the ground is set to be 300 mm or less.

  Accordingly, since the bicycle 1 is provided with the ascending slope portion 12b lower, the user can straddle the ascending slope portion 12b without raising his / her feet higher than before, and can easily get on. Therefore, the bicycle 1 can be easily boarded even by an elderly person or the like.

  In the bicycle 1, since the down tube portion 12 includes the downward slope portion 12 a and the upward slope portion 12 b between the head tube 11 and the seat tube 15, the front wheel 20 and the rear wheel 30 having a larger diameter than the conventional one are provided. Even if it is attached, the lowest ground height position 12c of the down tube portion 12 can be provided between the head tube 11 and the seat tube 15 in the same manner as in the past or lower than in the past, and it is easy for the user to straddle and get on easily. can do.

  Furthermore, since the bicycle 1 can be provided with larger diameters of the front wheels 20 and the rear wheels 30 while maintaining low flooring and improving riding performance, the traveling speed can be increased as compared with the prior art. You can easily get over even if there are steps. Accordingly, the bicycle 1 has a high riding performance while maintaining a low floor property and has a high ride performance, and has a large diameter of the front wheels 20 and the rear wheels 30.

  Further, in the bicycle 1, the down tube portion 12 has a descending slope portion 12a and an ascending slope portion 12b, and the descending slope portion 12a and the ascending slope portion 12b are formed in this order from the front wheel 20 side toward the rear wheel 30 side. Therefore, when a user gets on, the toe side of a foot becomes low, and it is easy to straddle. Therefore, the user can easily ride the bicycle 1.

  Further, as shown in FIG. 1, the ascending slope portion 12b is provided with a footrest member 90 for placing a foot when the user gets on and off. The foot placement member 90 is formed of, for example, a plate-like member, and is attached to the upper surface of the ascending slope portion 12b of the down tube portion 12 so as to be integrated or detachable by any conventionally known fixing means such as a bolt or welding. Therefore, the user can easily get on and off even a person who is difficult to raise his / her foot such as an elderly person by placing his / her foot on the footrest member 90 when getting on and off.

  In addition, although it is preferable that the height from the ground of the up-gradient part 12b of the down tube part 12 is provided in 300 mm or less, it is not limited to this, It can change suitably.

  Further, as shown in FIG. 5, a pair of projecting pieces 57 and 57 projecting downward are provided on the lower surface portion of the ascending slope portion 12 b of the down tube portion 12. The pair of projecting pieces 57 and 57 are disposed so as to face each other, and are integrally provided on the lower surface portion of the ascending slope portion 12b by any of conventionally known fixing means such as welding and bolts. Further, as shown in FIG. 6, a cylindrical shaft support portion 59 that supports the crankshaft 171 a is provided between the opposing protruding pieces 57 and 57. That is, as shown in FIG. 5, the crankshaft 171 a is disposed at a position offset downward with respect to the down tube portion 12 by the protruding piece 57. Therefore, as shown in FIG. 6, a space portion 200 is formed on the lower surface portion of the ascending gradient portion 12b between the lower surface portion of the ascending gradient portion 12b and the opposed projecting pieces 57 and 57 that offset-support the crankshaft 171a. Is done. In this space portion 200, a connector, an electric cord, and the like of an electric assist unit 160 of the drive unit 50 described later are housed.

  Further, as shown in FIG. 2, the main tube 14 is disposed on the lower surface 12c of the down tube portion 12 between the descending slope portion 12a and the ascending slope portion 12b of the down tube portion 12 or the lower surface in the vicinity thereof. A drain port 12d is formed for discharging rainwater or the like that has entered the inside to the outside. Here, since the main tube 14 is formed of a hollow member, there is a possibility that rainwater or the like may enter inside. Furthermore, since the main tube 14 is provided so that the distance between the descending slope portion 12a and the ascending slope portion 12b of the down tube portion 12 is the lowest ground height position 12c, rainwater or the like that has entered the interior is provided at this lowest level. It accumulates at the ground height position 12c. Accordingly, the main tube 14 can efficiently drain rainwater and the like that have entered the inside from the drain port 12d.

  As shown in FIG. 2, the saddle 80 is attached to the upper end portion of the seat tube 15 by inserting a saddle column tube 80 a into the seat tube 15. The saddle 80 is provided with a backrest 81 at the rear. Therefore, the user can drive in an easy posture while leaning on the backrest 81 when driving.

  Further, as shown in FIG. 1, an opening 63 is provided on the front surface of the rear loading platform 60, and further, an accommodation portion 62 is provided on the upper surface portion of the back tube portion 13, so that a cane, an umbrella, etc. The rod-shaped luggage is penetrated toward the housing portion 62, the bottom of the rod-shaped luggage such as a cane or an umbrella is housed in the housing portion 62, and the upper portion of the rod-shaped luggage such as a cane or an umbrella is provided in the backrest portion 81. It becomes possible to fix with the fixing tool 82, and the user can be prevented from receiving a bar-shaped baggage such as a cane or an umbrella, and the bar-shaped baggage can be prevented from falling during traveling.

<Operation unit>
As shown in FIG. 1, the operation unit 40 includes a control tube 41 rotatably supported by the head tube 11, a handle 42 attached to the upper end portion of the control tube 41 via a stem 42a, and the control tube. And a front fork 43 connected to the lower end of 41.

  The control tube 41 is inserted into the head tube 11 and is rotatably supported by bearing portions (not shown) provided at the upper and lower ends of the head tube 11, for example. Furthermore, one front fork 43 disposed below the head tube 11 is connected to the lower end of the control tube 41.

  Furthermore, as shown in FIG. 7, a horizontal cylindrical front wheel bearing box 45 is provided at the lower end of the front fork 43. And in this front wheel bearing box 45, one front wheel shaft with which a pair of front wheels 20 and 20 are attached to both ends via bearings (not shown) provided on both left and right ends of the front wheel bearing box 45. 46 is rotatably supported. Accordingly, the front wheel 20 is rotated in conjunction with the rotation of the control tube 41. Furthermore, since only one front fork 43 is provided between the pair of front wheels 20, the user can easily grasp the position of the front wheel 20.

  Moreover, the handle | steering-wheel 42 is attached to the upper end part of the control pipe 41 via the stem 42a, as shown in FIG. Such a handle 42 is, for example, an up handle or the like, and is formed to be substantially U-shaped. Furthermore, the grip part 42b which a user hold | grips is provided in the both ends of the handle | steering-wheel 42. As shown in FIG. Further, a front wheel brake lever 72 for braking the front wheel 20 with the front wheel brake 70 is attached to one end of the handle 42. Further, a rear wheel brake lever 112 for braking the rear wheel 30 with the rear wheel brake 110 is attached to the other end portion of the handle 42. The rear wheel brake lever 112 may be attached to one end portion of the handle 42 and the front wheel brake lever 72 may be attached to the other end portion of the handle 42. Furthermore, the handle 42 is not limited to the up handle, and may be any other conventionally known handle.

  Further, as shown in FIG. 8, the handle width W1 of the handle 42 is substantially the same as the vehicle width W2 of the rear wheels 30, 30, or is wider than the vehicle width W2 of the rear wheels 30, 30. It is provided as follows. That is, the handle width W1 of the handle 42 is at least the maximum vehicle width W3 of the bicycle 1. With such a configuration, it can be seen that if the handle 42 is wide enough to pass, the rear wheels 30, 30 are also wide enough to pass, and the rear wheel 30 inadvertently collides with the road shoulder in a narrow alley or the like. Can be prevented.

  Further, as shown in FIG. 2, since the head tube 11 is tilted with respect to the vertical so as to have a caster angle θ1, the handle 42 has a shorter distance from the saddle 80 than the conventional one. Thus, it is not necessary to take a forward leaning posture, and for example, it can be placed at a position where it can be easily operated while sitting on the saddle 80 in an easy posture leaning on the backrest 81 of the saddle 80.

  Further, as shown in FIG. 2, the operation portion 40 is provided with a stopper portion 47 that restricts the rotation of the control tube 41 and the front fork 43. The stopper portion 47 is attached to the outer periphery of the front fork 43, for example. Further, the stopper portion 47 is formed to have a substantially L-shape that protrudes in the radial direction of the front fork 43 and is bent upward so as to be substantially parallel to the axial direction of the front fork 43, for example. Has been. Therefore, for example, when the user cuts the handle 42, the stopper portion 47 abuts on the descending slope portion 12 a of the down tube portion 12 to restrict the rotation of the control tube 41. More specifically, the control tube 41 is restricted from rotating once.

  Note that the stopper portion 47 is not limited to a substantially L-shape, and when the user cuts the handle 42, the stopper portion 47 can abut the descending slope portion 12a to restrict the rotation of the control tube 41. Any shape may be used as long as it is such.

<Front wheel>
As shown in FIG. 2, the front wheel 20 is configured by attaching a tire 20b to a wheel 20a. Further, as the front wheel 20, for example, a tire 20b (wheel 20a) having a size of about 8 inches to 16 inches is used. The front wheel 20 is attached to both end portions of one front wheel shaft 46.

  The front wheel 20 having the above-described configuration is provided to be inclined with respect to the vertical so that the head tube 11 has a predetermined caster angle θ1, and the pair of front wheels 20 and 20 rotate below the head tube 11. Since it is provided on both sides of one front wheel shaft 46 that is freely supported, one wheel of the pair of front wheels 20 and 20 can be floated when the handle 42 is cut (rotated) to a certain angle. Therefore, the front wheel 20 can reduce the operation load of the handle 42 when the handle 42 is cut. Further, since the front wheels 20 and 20 are provided on both sides of a single front wheel shaft 46 that is rotatably supported below the head tube 11, the pair of front wheels 20 and 20 are independent shafts. The structure can be simplified as compared with the case where the pair of front wheels 20 and 20 is lifted, and when the one wheel of the pair of front wheels 20 and 20 floats, the rotation of the ground wheel 20 and the floating front wheel 20 rotates. The number is different, and it is possible to prevent the floating front wheel 20 from acting as a brake when it comes into contact with the ground.

  The front wheel 20 may be attached to the front wheel shaft 46 so as to have a predetermined backlash in the rotational direction with respect to the front wheel shaft 46. In this case, the bicycle 1 can idle the other front wheel 20 when the handle 42 is turned to a predetermined angle, and the operation load of the handle 42 when the handle 42 is turned can be reduced. The operability can be improved.

  Further, the front wheel 20 is provided with a front wheel brake 70 for braking the front wheel 20. The front wheel brake 70 is a disc brake, for example, and is provided on the front wheel shaft 46 between the pair of front wheels 20 and 20. The front wheel brake 70 is connected to a front wheel brake lever 72 provided at one end of the handle 42 via a front wheel brake wire 71. The front wheel brake 70 is not limited to a disc brake, and may be any other conventionally known brake.

  Therefore, the front wheels 20 and 20 are braked by one front wheel brake 70 when the front wheel brake lever 72 is operated by being gripped by the user. Further, since the front wheel brake 70 brakes the two front wheels 20 and 20 by one front wheel brake 70, it is possible to apply a braking force evenly to the two front wheels 20 and 20. Furthermore, since the pair of front wheels 20 and 20 is braked by one front wheel brake 70, the braking adjustment between the front wheels 20 and 20 required when the front wheel brake 70 is provided on each front wheel 20 is unnecessary, and maintenance is good. Moreover, it is inexpensive. Furthermore, since the front wheel brake 70 is provided between the pair of front wheels 20, 20, there is a low possibility that a user's hand or foot will touch, and safety is high. Further, when the front wheel brake 70 is a disc brake, the disc brake has a high braking force. Therefore, the user can easily brake the front wheel 20 by gently grasping the front wheel brake lever 72. Therefore, even an elderly person or the like can easily perform a braking operation.

<Rear wheel>
As shown in FIG. 2, the rear wheel 30 is configured by attaching a tire 30 b to a wheel 30 a as in the case of the front wheel 20. Further, as with the front wheel 20, the rear wheel 30 is a tire 30b (wheel 30a) having a size of about 8 inches to 16 inches, for example. Furthermore, the rear wheel 30 is composed of two wheels, and is supported by a bearing portion (not shown) provided in each rear tube 17 so as to be independently rotatable. Further, as shown in FIG. 4, one rear wheel 30 is connected to the first rear wheel drive shaft 100a, and the other rear wheel 30 is connected to the second rear wheel drive shaft 100b. The first rear wheel drive shaft 100a and the second rear wheel drive shaft 100b are connected via a differential gear 100c.

  Therefore, when turning left and right, the rotational speed of the rear wheel 30 on the outside of the turn increases, so that it can run smoothly without slipping and stably support loads including centrifugal force during turning. While driving safely. Therefore, it is possible to make a U-turn while riding even if the road is narrow, for example, even if the road is narrow.

  Further, the rear wheel 30 is provided with a rear wheel brake 110 that brakes the rear wheel 30. The rear wheel brake 110 is a disc brake, for example, and is provided on at least one of the rear wheel drive shafts 100a and 100b (hereinafter also simply referred to as the rear wheel drive shaft 100) between the pair of rear wheels 30 and 30. . As shown in FIG. 1, the rear wheel brake 110 is connected to a rear wheel brake lever 112 provided at the other end of the handle 42 via a rear wheel brake wire 111. Therefore, the rear wheels 30 and 30 are braked by the rear wheel brake 110 when the rear wheel brake lever 112 is operated by being gripped by the user. Further, since the disc brake has a high braking force, the user can easily brake the rear wheel 30 by gently grasping the rear wheel brake lever 112. Therefore, even an elderly person or the like can easily perform a braking operation.

  Further, the rear wheel brake wire 111 is provided so as to be inserted through the main tube 14. Specifically, as shown in FIG. 2, the main tube 14 is formed with a first wire opening 14 a through which the rear wheel brake wire 111 is inserted on the side of the downward slope portion 12 a of the down tube portion 12. As shown in FIG. 4, a second wire opening 14 b through which the rear wheel brake wire 111 is inserted is formed in the rear end surface 13 a of the back tube portion 13. The rear wheel brake wire 111 is inserted into the main tube 14 by being inserted from one of the first wire opening 14a and the second wire opening 14b into the inside and discharged from the other to the outside. . Accordingly, the bicycle 1 is provided so that the rear wheel brake wire 111 is inserted through the main tube 14, so that the rear wheel brake wire 111 is fixed to the main tube 14 or the like so as not to interfere with the crank 53 or the user. It is no longer necessary to apply brake wire treatment. Therefore, the work efficiency is improved and the cost can be reduced.

  The first wire opening portion 14a is not limited to be formed on the side surface of the descending slope portion 12a of the down tube portion 12, but is formed on the upper surface or the lower surface of the descending slope portion 12a. Alternatively, it may be formed on any surface of the ascending slope portion 12b, or may be formed on any surface of the back tube portion 13. Further, the second wire opening portion 14b is not limited to being formed on the rear end surface 13a of the back tube portion 13, and is formed on any one of the upper surface, the lower surface, and the side surface of the back tube portion 13. You may make it.

  Further, the rear wheel brake 110 is not limited to a disc brake, and any other conventionally known band brake such as a band brake that tightens and brakes the outer periphery of a brake drum provided on the hub of the rear wheel 30 with a belt-like band. It may be a brake.

<Driver>
As shown in FIG. 2, the drive unit 50 includes an electric assist unit 160 that assists the user's human power (stepping force). The electric assist unit 160 includes, for example, an auxiliary power output unit 170 that outputs auxiliary power, an operation switch unit 180 that performs various operations of the electric assist unit 160, and a battery unit 190 that supplies electric power to the auxiliary power output unit 170. It consists of

  As shown in FIG. 9, the auxiliary power output unit 170 that outputs the auxiliary power includes, for example, a complex of a crankshaft 171a, a bearing (not shown) that receives rotation of the crankshaft 171a, and a cup portion 171b that accommodates the bearing. And a detecting means (not shown) such as a torque sensor that is attached to the crankshaft 171a of the bottom bracket 171 and detects a user's pedaling force (stepping force). Further, the auxiliary power output unit 170 includes, for example, a drive sprocket (not shown) attached to the crankshaft 171a of the bottom bracket 171 together with the one-way clutch, and a speed reducer (not used) to the drive sprocket according to the pedaling force detected by the detecting means. And an electric motor 172 that outputs auxiliary power via a control unit (not shown) that controls the entire electric assist unit 160.

  Further, as shown in FIG. 9, the electric motor 172 includes a first electric cord 173 for electrically connecting with the operation switch unit 180 and a second electric cord for electrically connecting with the battery unit 190. 174. The first electric cord 173 is, for example, a signal line cable, and is exposed to the outside from the lower side of the outer casing of the electric motor 172. Further, a first output side connector 175 connected to a switch side connector 182 provided at the front end of the electric cord 181 of the operation switch unit 180 is provided at the front end portion of the first electric cord 173. The second electric cord 174 is a power line cable, for example, and is exposed to the outside from the upper side of the outer casing of the electric motor 172. Furthermore, a second output-side connector 176 that is connected to a battery-side connector 192 provided at the tip of the electric cord 191 of the battery unit 190 is provided at the tip of the second electric cord 174.

  As shown in FIG. 3, such an auxiliary power output unit 170 is a cylinder in which a bottom bracket 171 is provided between opposed projecting pieces 57 and 57 provided on the lower surface of the ascending slope portion 12 b of the down tube portion 12. And the electric motor 172 is fastened by a fastening means such as a bolt to a motor fixing portion (not shown) provided on the lower surface of the ascending slope portion 12b of the down tube portion 12. And attached to the down tube portion 12. At this time, the drive sprocket of the electric assist unit 160 and the electric motor 172 are provided such that the upper end portion is positioned below the upper surface of the ascending slope portion 12b of the down tube portion 12, as shown in FIG. In other words, the drive sprocket and the electric motor 172 are provided so that the upper end portion does not protrude from the upper surface of the ascending slope portion 12 b of the down tube portion 12.

  Moreover, the operation switch part 180 which performs various operation of the electric assist unit 160 is attached to the handle 42 of the operation part 40 as shown in FIG. Here, the operation switch portion 180 is attached to the other end portion of the handle 42. The operation switch unit 180 may be attached to one end of the handle 42, or may be attached to the stem 42a or the head tube 11. Such an operation switch unit 180 includes, for example, a power on / off button, a mode selection button for selecting one assist mode from among a plurality of assist modes, and a battery remaining amount for displaying the remaining amount of the battery unit 190. A display unit is provided.

  Further, as shown in FIG. 1, the operation switch unit 180 is provided with an electric cord 181 for electrically connecting to the auxiliary power output unit 170. The electric cord 181 is, for example, a signal line cable, and as shown in FIG. 10, a switch-side connector 182 that is connected to the first output-side connector 175 of the auxiliary power output unit 170 is provided at the distal end portion. Further, the electric cord 181 is disposed along the lower surface portion of the down tube portion 12 and is fixed to the down tube portion 12 by a band fixture 183. The operation switch unit 180 is electrically connected to the auxiliary power output unit 170 by connecting the switch side connector 182 to the first output side connector 175 of the auxiliary power output unit 170.

  Moreover, the battery part 190 which supplies electric power to the auxiliary power output part 170 is comprised, for example with a lithium ion battery, a nickel metal hydride battery, etc. As shown in FIG. 2, the battery unit 190 is a battery holder attached to a rear surface portion that is a surface on the rear wheel 30 side of the electric assist mounting tube 15 b provided between the seat tube 15 and the back tube portion 13. 193 is detachably held. And this battery part 190 is electrically connected with the battery holder 193 by connecting with the terminal provided in the bottom face of the battery holder 193 so that the terminal provided in the bottom face may face this terminal. The battery holder 193 may be attached to the upper surface portion of the back tube portion 13.

  Further, as shown in FIG. 10, the battery holder 193 is provided with an electric cord 191 for electrically connecting to the auxiliary power output unit 170. The electrical cord 191 is, for example, a power line cable, and a battery-side connector 192 that is connected to the second output-side connector 176 of the auxiliary power output unit 170 is provided at the tip. The electric cord 191 is disposed along the lower surface portion of the back tube portion 13, and is fixed to the back tube portion 13 by a band fixing tool 194. The battery unit 190 is electrically connected to the auxiliary power output unit 170 by connecting the battery side connector 192 to the second output side connector 176 of the auxiliary power output unit 170.

  As shown in FIG. 10, the auxiliary power output unit 170 and the operation switch unit 180 include a first output connector 175 provided at the tip of the first electric cord 173 of the auxiliary power output unit 170 and an operation switch. The switch-side connector 182 provided at the tip of the electric cord 181 of the portion 180 is connected to be electrically connected. At this time, the first output-side connector 175 and the switch-side connector 182 are space portions formed by the lower surface portion of the down tube portion 12 and the opposed projecting pieces 57 and 57 provided on the lower surface portion of the down tube portion 12. 200 is stored from the front wheel 20 side. Further, a surplus portion on the front end side of the first electric cord 173 of the auxiliary power output unit 170 and / or a surplus portion on the front end side of the electric cord 181 of the operation switch unit 180 are connected to the first output side connector 175 and the switch side connector. Together with 182, the space 200 is accommodated from the front wheel 20 side.

  That is, the bicycle 1 includes the first output connector 175 and the first output side connector 175 in the space portion 200 formed by the lower surface portion of the down tube portion 12 and the opposed protruding pieces 57 and 57 provided on the lower surface portion of the down tube portion 12. The switch side connector 182 can be accommodated. Therefore, the bicycle 1 can prevent the first output side connector 175 and the switch side connector 182 from receiving external force directly, and the first output side connector 175 and the switch side connector 182 are disconnected. Or the first output side connector 175 and the switch side connector 182 can be prevented from being damaged.

  Further, in the bicycle 1, the first output side connector 175 and the switch side connector 182 are housed in the space portion 200, so that the first output side connector 175 and the switch side connector 182 are disconnected, etc. Can be prevented. Further, in the bicycle 1, the first output side connector 175 and the switch side connector 182 are housed in the space portion 200, so that the first output side connector 175 and the switch side connector 182 can be protected from rainwater.

  Further, the bicycle 1 uses a first output-side connector to connect a surplus portion on the front end side of the first electric cord 173 of the auxiliary power output unit 170 and / or a surplus portion on the front end side of the electric cord 181 of the operation switch unit 180. 175 and the switch-side connector 182 can be housed in the space 200. Accordingly, the bicycle 1 does not need to be strictly provided with the length of the first electric cord 173 of the auxiliary power output unit 170 and the length of the electric cord 181 of the operation switch unit 180, so that work efficiency is improved. The defective rate of parts can be reduced.

  Further, as shown in FIG. 10, the auxiliary power output unit 170 and the battery unit 190 include a second output-side connector 176 and a battery holder 193 provided at the tip of the second electric cord 174 of the auxiliary power output unit 170. The battery is electrically connected by being connected to the battery side connector 192 provided at the tip of the electric cord 191 provided on the cable. At this time, the second output side connector 176 and the battery side connector 192 are housed from the rear wheel 30 side in the space portion 200 formed by the projecting pieces 57 and 57 facing the lower surface portion of the down tube portion 12. Further, a surplus portion on the front end side of the second electric cord 174 of the auxiliary power output unit 170 and / or a surplus portion on the front end side of the electric cord 191 of the battery unit 190 are connected to the second output side connector 176 and the battery side connector 192. At the same time, the space 200 is accommodated from the rear wheel 30 side.

  That is, the bicycle 1 can accommodate the second output side connector 176 and the battery side connector 192 in the space portion 200 formed by the lower surface portion of the down tube portion 12 and the protruding pieces 57 and 57. Therefore, the bicycle 1 can prevent the second output side connector 176 and the battery side connector 192 from receiving external force directly, and the second output side connector 176 and the battery side connector 192 are disconnected. 2nd output side connector 176 and battery side connector 192 can be prevented from being damaged.

  Further, in the bicycle 1, since the second output side connector 176 and the battery side connector 192 are housed in the space portion 200, the connection of the second output side connector 176 and the battery side connector 192 is disconnected, etc. It is possible to prevent tampering. Furthermore, since the second output-side connector 176 and the battery-side connector 192 are housed in the space 200, the bicycle 1 can protect the second output-side connector 176 and the battery-side connector 192 from rainwater. .

  Further, the bicycle 1 uses the second output-side connector 176 to connect the surplus portion on the distal end side of the second electric cord 174 of the auxiliary power output unit 170 and / or the surplus portion on the distal end side of the electric cord 191 of the battery unit 190. And the battery-side connector 192 can be housed in the space 200. Accordingly, the bicycle 1 does not need to be strictly provided with the length of the second electric cord 174 of the auxiliary power output unit 170 and the length of the electric cord 191 of the battery unit 190. The defect rate can be reduced.

  Furthermore, as shown in FIG. 5, a pair of cranks 53 and 53 for turning the drive sprocket are attached to the left and right ends of the crankshaft 171a of the auxiliary power output unit 170 in opposite directions. At the tip of the crank 53, a pedal 54 is attached as a step board on which a user puts his / her foot and transmits force to the bicycle 1. The crank 53 is provided with a length of 130 mm to 180 mm, for example. Therefore, the crank 53 is provided with the shaft support portion 59 so that the height from the ground is 180 mm to 230 mm as described above, and thus has a gap of about 50 mm between the crank 53 and the ground. Therefore, the bicycle 1 can travel without the pedal 54 coming into contact with the step or the like even if there is a certain level of difference such as a step between a road and a sidewalk on a general road.

  Further, an endless chain 55 is bridged between the drive sprocket of the auxiliary power output unit 170 and rear wheel sprockets (not shown) provided on the rear wheel drive shafts 100a and 100b of the rear wheel 30. The endless chain 55 transmits the rotation of the drive sprocket to the rear wheel 30. The endless chain 55 may be prevented from loosening by an auxiliary sprocket 56 provided below the down tube portion 12 or the like. Moreover, it is not limited to the endless chain 55, You may make it use an endless toothed belt.

  Further, as shown in FIG. 2, the drive unit 50 is attached to the main frame 10 via the main tube 14, the first reinforcing tube 16, and the like, and has a chain cover 58 that covers the drive sprocket and the endless chain 55. Yes. The chain cover 58 is provided, for example, so as to cover the entire circumference of the drive sprocket and to cover the upper endless chain 55 between the drive sprocket and the rear wheel sprocket. Dirt and biting due to contact of the hems and the like with the endless chain 55 are prevented. Further, the chain cover 58 is provided so that the upper end portion is located below the upper surface of the ascending slope portion 12 b of the down tube portion 12 and does not protrude from the upper surface of the ascending slope portion 12 b of the down tube portion 12. In other words, the crankshaft 171a is arranged so that the upper end portion of the chain cover 58 is positioned below the upper surface of the ascending slope portion 12b of the down tube portion 12 and does not protrude from the upper surface of the ascending slope portion 12b of the down tube portion 12. It is provided on the lower surface of the ascending slope portion 12 b of the down tube portion 12 through the support portion 59.

  Furthermore, the drive unit 50 is set so that a GD value that is a distance (m) that the bicycle travels by one rotation of the pedal is 1.75. For example, since the GD value of the general bicycle is around 5.5, the GD value of the bicycle 1 is set lower than that of the general bicycle. The standard number of pedals per minute (cadence) is 60 times / minute, and the speed at this time is expressed in km / h: (GD value) x (cadence) x (60 minutes) ÷ 1000 Become. Therefore, in a general bicycle, 5.5 × 60 × 60 ÷ 1000 = 19.8 km / h. On the other hand, in the bicycle 1, 1.75 × 60 × 60 ÷ 1000 = 6.3 km / h. That is, the bicycle 1 is set so that it does not go too fast, and is substantially equivalent to the walking speed, for example. The walking speed varies depending on the person, but is generally 3 to 7 km / h, and the GD value is preferably 0.8 to 2.0.

<Bicycle dimensions>
As shown in FIG. 8, the bicycle 1 having the above configuration has, for example, a total length L1 that is a horizontal distance from the front end portion of the front wheel 20 to the rear end portion of the rear wheel 30 to be 1000 mm to 1500 mm. Is provided. Furthermore, the bicycle 1 is provided so that the vehicle width (maximum vehicle width) W3 is 800 mm or less. Therefore, this bicycle 1 has excellent stability.

  Here, as shown in FIG. 11, bicycle parking racks 121 that support general two-wheel bicycles 120 in bicycle parking lots such as stations and apartments are generally arranged at intervals of 400 mm. Therefore, the bicycle 1 can be parked in the parking space 122 between the parking racks 121 and 121 by providing the maximum vehicle width W3 to be 800 mm or less.

  Furthermore, the general two-wheeled bicycle 120 supported by the bicycle parking rack 121 often has an overall length X of about 1800 mm. Therefore, the bicycle 1 is provided with a length L1 that is at least about 300 mm shorter than the general two-wheel bicycle 120, thereby preventing the handle 42 of the bicycle 1 and the handle 120a of the general two-wheel bicycle 120 from interfering with each other. Can do. Further, the bicycle 1 is located at substantially the same position as the rear portion of the adjacent general two-wheel bicycle 120 in which the rear portions such as the rear wheel 30 and the rear loading platform 60 are adjacent, and protrudes rearward from the rear portion of the adjacent general two-wheel bicycle 120. This can be prevented.

  Furthermore, in general, a storage passage 123 is provided behind the bicycle parking space 122 of the bicycle parking lot so that bicycles or the like that can park the bicycle can pass therethrough and the bicycles can be taken in and out freely. The road width of the storage passage 123 is standard at 1.8 m for parking lots with many face-to-face traffic, and 1.5 m for other parking lots (Bicycle Parking Lot Maintenance Center / Bicycle Parking Lot Installation Technology) (Refer to the guidance study report). Therefore, by setting the total length L1 of the bicycle 1 within 1500 mm, the bicycle 1 can be drawn straight out from the parking space 122 to the storage passage 123. Furthermore, by setting the total length L1 of the bicycle 1 within 1450 mm, the bicycle 1 can be pulled straight out from the parking space 122 to the storage passage 123 with a margin of about 50 mm with respect to the road width. Therefore, for example, it is not necessary to enter a narrow space between the bicycle 1 and the adjacent two-wheeled bicycle 120 as shown by S1 in FIG. 11 and operate the handle 42 to turn right or left and pull it out. For example, the rear portion of the bicycle 1 may be simply pulled from the rear and pulled straight back, and the bicycle 1 can be easily pulled out from the parking space 122.

  Further, as shown in FIG. 2, the bicycle 1 has a horizontal distance L10 from the center position of the saddle 80 to the rotation shaft of the rear wheel 30 (rear wheel drive shaft 100). It is provided so as to be larger than the horizontal distance L11 to 50 crankshafts 171a. For example, the horizontal distance L10 from the center position of the saddle 80 to the rotation axis of the rear wheel 30 is set to be 300 mm to 800 mm. Further, a horizontal distance L11 from the center position of the saddle 80 to the crankshaft 171a of the drive unit 50 is provided to be 200 mm to 300 mm. Here, the center position of the saddle 80 is the maximum height position where the center of gravity is the most rearward because the saddle 80 can be moved up and down according to the user's physique to adjust the saddle height. This is the center position of the saddle 80.

  Accordingly, the horizontal distance L10 from the center position of the saddle 80 to the rotating shaft of the rear wheel 30 is set to be larger than the horizontal distance L11 from the center position of the saddle 80 to the crankshaft 171a of the drive unit 50. Thus, as shown in FIG. 12C, when the bicycle 1 travels on the uphill slope 130, the front wheel 20 is lifted or falls backwards even if the position of the center of gravity when riding the saddle is lowered rearward. It is possible to prevent problems from occurring. Therefore, the bicycle 1 can maintain the stability of the vehicle when riding, even when traveling on an uphill slope.

  Furthermore, since the bicycle 1 can prevent problems such as the front wheel 20 floating or falling backward, a disc brake having higher braking force than the band brake can be employed as the rear wheel brake 110. . Therefore, the bicycle 1 can easily brake the rear wheel 30 by lightly grasping the rear wheel brake lever 112 even for an elderly person or the like. Therefore, the bicycle 1 can easily perform a braking operation even for an elderly person or the like while maintaining the stability of the vehicle when riding, even when traveling on an uphill slope.

  In FIG. 12A, as a reference example, a horizontal distance L10 from the center position of the saddle 80 to the rotation shaft of the rear wheel 30 is a distance from the center position of the saddle 80 to the crankshaft 171a of the drive unit 50. A bicycle 140 that is smaller than or the same as the horizontal distance L11 is shown. In such a case, the angle θ2 formed by the vertical line 140a of the bicycle 140 of the reference example and the side 140b connecting the center position of the saddle 80 and the rotation axis of the rear wheel 30 is the vertical line 150a of the bicycle 1. The angle θ3 (see FIG. 2) formed by the side 150b connecting the center position of the saddle 80 and the rotation axis of the rear wheel 30 is small. For example, the angle θ3 formed by the bicycle 1 is about 23 degrees, whereas the angle θ2 formed by the bicycle 140 of the reference example is about 14 degrees.

  Therefore, as shown in FIGS. 12 (B) and 12 (C), when the position of the center of gravity when riding on the saddle is lowered when traveling on the uphill slope 130, the bicycle of the reference example shown in FIG. 12 (B). As compared with 140, the bicycle 1 shown in FIG. 12 (C) can prevent the front wheel 20 from floating or causing a malfunction such as falling backward. Therefore, when the bicycle 1 travels on the uphill slope 130, the stability of the vehicle when riding can be maintained as compared with the bicycle 140 of the reference example. That is, if the bicycle 1 has the same overall length as the bicycle 140 of the reference example, the stability of the vehicle when riding can be maintained more than the bicycle 140 of the reference example. On the other hand, the bicycle 1 maintains the stability of the vehicle when riding about the same level as the bicycle 140 of the reference example, while shortening the overall length and improving the turning ability, compared with the bicycle 140 of the reference example. Can do.

  Further, as shown in FIG. 2, the bicycle 1 is provided such that a horizontal distance L12 from the crankshaft 171a of the drive unit 50 to the rear end of the front wheel 20 is 200 mm to 300 mm. More preferably, the horizontal distance L12 from the crankshaft 171a of the drive unit 50 to the rear end of the front wheel 20 is substantially the same as the horizontal distance L11 from the center position of the saddle 80 to the crankshaft 171a of the drive unit 50. To be provided. In other words, the crankshaft 171a of the drive unit 50 is provided at a substantially central position between the center position of the saddle 80 and the rear end portion of the front wheel 20. Thus, the user can bend knees and ankles when pedaling 54, can reduce the knee and ankle burden when pedaling 54, and can easily pedal pedal 54. .

<Effect>
As described above, the bicycle 1 to which the present invention is applied has the space portion 200 formed by the lower surface portion of the down tube portion 12 and the opposed protruding pieces 57 and 57 provided on the lower surface portion of the down tube portion 12. The first output side connector 175 of the auxiliary power output unit 170 and the switch side connector 182 of the operation switch unit 180 can be accommodated. Therefore, the bicycle 1 can prevent the first output side connector 175 and the switch side connector 182 from receiving external force directly, and the first output side connector 175 and the switch side connector 182 are disconnected. Or the first output side connector 175 and the switch side connector 182 can be prevented from being damaged.

  Further, in the bicycle 1, since the first output side connector 175 and the switch side connector 182 are accommodated in the space part 200, the connection of the first output side connector 175 and the switch side connector 182 is disconnected, etc. It is possible to prevent tampering. Furthermore, since the first output-side connector 175 and the switch-side connector 182 are housed in the space portion 200 of the bicycle 1, the first output-side connector 175 and the switch-side connector 182 can be protected from rainwater. .

  Further, the bicycle 1 uses a first output-side connector to connect a surplus portion on the front end side of the first electric cord 173 of the auxiliary power output unit 170 and / or a surplus portion on the front end side of the electric cord 181 of the operation switch unit 180. 175 and the switch-side connector 182 can be housed in the space 200. Accordingly, the bicycle 1 does not need to be strictly provided with the length of the first electric cord 173 of the auxiliary power output unit 170 and the length of the electric cord 181 of the operation switch unit 180, so that work efficiency is improved. The defective rate of parts can be reduced.

  Further, the bicycle 1 has a second output side connector 176 of the auxiliary power output unit 170 and a battery side of the battery unit 190 in the space portion 200 formed by the lower surface portion of the down tube portion 12 and the protruding pieces 57 and 57. The connector 192 can be stored. Therefore, the bicycle 1 can prevent the second output side connector 176 and the battery side connector 192 from receiving external force directly, and the second output side connector 176 and the battery side connector 192 are disconnected. 2nd output side connector 176 and battery side connector 192 can be prevented from being damaged.

  Further, in the bicycle 1, since the second output side connector 176 and the battery side connector 192 are housed in the space portion 200, the connection of the second output side connector 176 and the battery side connector 192 is disconnected, etc. It is possible to prevent tampering. Furthermore, since the second output-side connector 176 and the battery-side connector 192 are housed in the space 200, the bicycle 1 can protect the second output-side connector 176 and the battery-side connector 192 from rainwater. .

  Further, the bicycle 1 uses the second output-side connector 176 to connect the surplus portion on the distal end side of the second electric cord 174 of the auxiliary power output unit 170 and / or the surplus portion on the distal end side of the electric cord 191 of the battery unit 190. And the battery-side connector 192 can be housed in the space 200. Accordingly, the bicycle 1 does not need to be strictly provided with the length of the second electric cord 174 of the auxiliary power output unit 170 and the length of the electric cord 191 of the battery unit 190. The defect rate can be reduced.

  Note that the bicycle 1 does not house the second output side connector 176 of the auxiliary power output unit 170 and the battery side connector 192 of the battery unit 190 in the space 200, and the first output of the auxiliary power output unit 170. Only the side connector 175 and the switch side connector 182 of the operation switch unit 180 may be accommodated, and the first output side connector 175 of the auxiliary power output unit 170 and the switch side connector 182 of the operation switch unit 180 may be accommodated. Instead, only the second output side connector 176 of the auxiliary power output unit 170 and the battery side connector 192 of the battery unit 190 may be housed.

  Further, the bicycle 1 does not house the first output-side connector 175 of the auxiliary power output unit 170 and the switch-side connector 182 of the operation switch unit 180 in the space 200, and the first power-supply unit 170 of the auxiliary power output unit 170 is not accommodated. Only the surplus portion of the electric cord 173 may be accommodated, or only the surplus portion of the electrical cord 181 of the operation switch unit 180 may be accommodated.

  Further, the bicycle 1 does not house the second output-side connector 176 of the auxiliary power output unit 170 and the battery-side connector 192 of the battery unit 190 in the space 200, and the second electric power of the auxiliary power output unit 170 is stored. Only the surplus portion of the cord 174 may be stored, or only the surplus portion of the electric cord 191 of the battery unit 190 may be stored.

  Furthermore, the bicycle 1 does not house the second output side connector 176 of the auxiliary power output unit 170 and the battery side connector 192 of the battery unit 190 in the space 200, and the lower surface portion of the down tube portion 12 and the auxiliary power. You may make it accommodate the 2nd output side connector 176 of the auxiliary power output part 170, and the battery side connector 192 of the battery part 190 in the space part formed with the electric motor 172 of the output part 170. FIG.

  Even in such a case, the bicycle 1 can prevent the second output-side connector 176 and the battery-side connector 192 from directly receiving external force, and the second output-side connector 176 and the battery The connection of the side connector 192 can be prevented, and the second output side connector 176 and the battery side connector 192 can be prevented from being damaged.

  Further, in the bicycle 1, the second output side connector 176 and the battery side connector 192 are housed in a space formed by the lower surface portion of the down tube portion 12 and the electric motor 172 of the auxiliary power output portion 170. As in the case of being housed in the space part 200, it is possible to prevent tampering such as disconnection of the second output side connector 176 and the battery side connector 192. Furthermore, the bicycle 1 can protect the second output side connector 176 and the battery side connector 192 from rainwater.

<2. Explanation of Bicycle of Second Embodiment>
In the bicycle 1 of the first embodiment, the second output side connector 176 of the auxiliary power output unit 170 and the battery unit 190 are formed in the space 200 formed by the lower surface of the down tube portion 12 and the protruding pieces 57 and 57. Whereas the battery-side connector 192 is housed, the bicycle 210 of the second embodiment has a second housing member 211 provided on the lower surface portion of the back tube portion 13 as shown in FIG. The output side connector 176 and the battery side connector 192 are accommodated. In addition, about the bicycle 210 of 2nd embodiment, what has the same structure as the bicycle 1 of 1st embodiment mentioned above attaches | subjects the same code | symbol, abbreviate | omits description, Hereinafter, only a different structure is demonstrated.

  The storage member 211 of the bicycle 210 of the second embodiment is formed, for example, in a box shape having an upper surface opened. That is, the storage member 211 has a front surface portion 211a, a back surface portion 211b, a pair of side surface portions 211c, 211c, and a bottom surface portion 211e. Such a storage member 211 is attached to the lower surface portion of the back tube portion 13 so that the upper surface opening is brought into contact with the lower surface portion of the back tube portion 13. Accordingly, a space 212 is formed on the lower surface of the back tube portion 13 by the lower surface of the back tube portion 13 and the storage member 211. Furthermore, an opening 213 through which the second output connector 176 and the battery connector 192 are inserted into the space 212 is formed in the back surface 211b.

  Therefore, the bicycle 210 according to the second embodiment has the space 212 formed by the lower surface of the back tube portion 13 and the storage member 211 on the lower surface of the back tube portion 13. When the battery unit 190 is electrically connected, the second output side connector 176 and the battery side connector 192 can be accommodated in the space 212 from the opening 213. Therefore, like the bicycle 1 of the first embodiment, the bicycle 210 can prevent the second output side connector 176 and the battery side connector 192 from receiving external force directly, and the second output side It is possible to prevent the connector 176 and the battery side connector 192 from being disconnected and the second output side connector 176 and the battery side connector 192 from being damaged.

  Further, in the bicycle 210, the second output side connector 176 and the battery side connector 192 are connected to each other because the second output side connector 176 and the battery side connector 192 are stored in the storage member 211 (space portion 212). It is possible to prevent tampering such as removal. Further, in the bicycle 210, since the second output side connector 176 and the battery side connector 192 are housed in the housing member 211 (space portion 212), the second output side connector 176 and the battery side connector 192 are removed from the rainwater. Can be protected.

  Further, the bicycle 210 uses a second output-side connector 176 to connect a surplus portion on the front end side of the second electric cord 174 of the auxiliary power output unit 170 and / or a surplus portion on the front end side of the electric cord 191 of the battery unit 190. The battery can be stored in the storage member 211 (space 212) together with the battery-side connector 192. Accordingly, the bicycle 210 does not need to strictly provide the length of the second electric cord 174 of the auxiliary power output unit 170 and the length of the electric cord 191 of the battery unit 190, so that the work efficiency is improved and the parts are further improved. The defect rate can be reduced.

  In the bicycle 210, the surplus portion on the distal end side of the second electric cord 174 of the auxiliary power output unit 170 is stored in the storage member 211 (space portion 212) and / or in the storage member 211 (space portion 212). Instead of being housed, the surplus portion on the proximal end side of the second electric cord 174 of the auxiliary power output unit 170 is bent into the space 200 formed by the lower surface portion of the down tube portion 12 and the protruding pieces 57 and 57. May be stored. In such a case, the bicycle 210 can more flexibly provide the length of the second electric cord 174 of the auxiliary power output unit 170 and the length of the electric cord 191 of the battery unit 190, and work efficiency can be further improved. Furthermore, the defect rate of parts can be further reduced.

  Further, the storage member 211 is not limited to the opening portion 213 formed in the back surface portion 211b, and may be formed in any one of the front surface portion 211a, the side surface portion 211c, and the bottom surface portion 211e. .

  Further, the storage member 211 may be any member as long as it has at least a facing piece and the space 212 is formed by a piece facing the lower surface portion of the back tube portion 13. A configuration having only 211a and a rear surface portion 211b, or a configuration having only a pair of opposing side surface portions 211c and 211c may be employed.

  Further, the bicycle 210 does not house the second output side connector 176 of the auxiliary power output unit 170 and the battery side connector 192 of the battery unit 190 in the storage member 211 (space portion 212), and the auxiliary power output unit 170. Only the surplus portion of the second electric cord 174 may be accommodated, or only the surplus portion of the electrical cord 191 of the battery unit 190 may be accommodated.

  Further, in the bicycle 210, the first output side connector 175 of the auxiliary power output unit 170 and the switch side connector 182 of the operation switch unit 180 are not accommodated in the space 200, and the first power output unit 170 of the auxiliary power output unit 170 is not accommodated. Only the surplus portion of the electric cord 173 may be accommodated, or only the surplus portion of the electrical cord 181 of the operation switch unit 180 may be accommodated. In addition, the bicycle 210 has an excess of the first output connector 175 of the auxiliary power output unit 170, the switch side connector 182 of the operation switch unit 180, and the first electric cord 173 of the auxiliary power output unit 170 in the space 200. Neither the part nor the surplus part of the electric cord 181 of the operation switch unit 180 may be stored.

  Further, the bicycle 210 is not limited to providing the storage member 211 on the lower surface portion of the back tube portion 13, and is provided on the upper surface portion or the lower surface portion of the down tube portion 12 together with the lower surface portion of the back tube portion 13. Alternatively, it is provided on the lower surface portion of the down tube portion 12 instead of the lower surface portion of the back tube portion 13, and the first output side connector 175 of the auxiliary power output portion 170, the switch side connector 182 of the operation switch portion 180, the auxiliary power The surplus portion of the first electrical cord 173 of the output unit 170 and the surplus portion of the electrical cord 181 of the operation switch unit 180 may be accommodated, and only the surplus portion of the first electrical cord 173 of the auxiliary power output unit 170 is stored. May be stored, or only the excess portion of the electric cord 181 of the operation switch unit 180 may be stored. .

<3. Explanation of Bicycle of Third Embodiment>
In the bicycle 210 of the second embodiment, the storage member 211 is provided on the lower surface portion of the back tube portion 13, whereas in the bicycle 220 of the third embodiment, as shown in FIG. The second output side connector 176 of the auxiliary power output unit 170 and the battery unit 190 are provided in a space part 222 formed on the upper surface part of the back tube part 13 and formed by the upper surface part of the back tube part 13 and the storage member 221. The battery side connector 192 is accommodated. In addition, about the bicycle 220 of 3rd embodiment, what has the structure similar to the bicycle 1 of 1st embodiment mentioned above and the bicycle 210 of 2nd embodiment attaches | subjects the same code | symbol, and abbreviate | omits description below. Only different configurations will be described.

  The storage member 221 of the bicycle 220 of the third embodiment is formed, for example, in a box shape whose front and bottom surfaces are opened. That is, the storage member 221 includes a back surface portion 221b, a pair of side surface portions 221c and 221c, and an upper surface portion 221d. Such a storage member 221 makes the front opening contact the rear surface which is the surface on the rear wheel 30 side of the seat tube 15 and makes the bottom opening contact the upper surface of the back tube portion 13. It is attached to a corner portion formed by the upper surface portion of the back tube portion 13 and the rear surface portion of the seat tube 15. As a result, a space 222 is formed on the upper surface of the back tube portion 13 by the upper surface of the back tube portion 13, the rear surface portion of the seat tube 15, and the storage member 221. Furthermore, an opening 223 through which the second output side connector 176 and the battery side connector 192 are inserted into the space 222 is formed in the back surface part 221b.

  Therefore, the bicycle 220 according to the third embodiment has the space 222 formed by the upper surface of the back tube 13, the rear surface of the seat tube 15, and the storage member 221 on the upper surface of the back tube 13. When the auxiliary power output unit 170 and the battery unit 190 are electrically connected, the second output side connector 176 and the battery side connector 192 can be accommodated in the space 222 through the opening 223. it can. Therefore, like the bicycle 1 of the first embodiment and the bicycle 210 of the second embodiment, the bicycle 220 prevents the second output side connector 176 and the battery side connector 192 from receiving external force directly. Thus, it is possible to prevent the second output side connector 176 and the battery side connector 192 from being disconnected or the second output side connector 176 and the battery side connector 192 from being damaged.

  Further, in the bicycle 220, since the second output side connector 176 and the battery side connector 192 are housed in the housing member 221 (space 222), the connection between the second output side connector 176 and the battery side connector 192 is established. It is possible to prevent tampering such as removal. Further, in the bicycle 220, since the second output side connector 176 and the battery side connector 192 are housed in the housing member 221 (the space 222), the second output side connector 176 and the battery side connector 192 are removed from the rainwater. Can be protected.

  Further, the bicycle 220 is configured such that a surplus portion on the front end side of the second electric cord 174 of the auxiliary power output unit 170 and / or a surplus portion on the front end side of the electric cord 191 of the battery unit 190 is connected to the second output side connector 176. And the battery side connector 192 can be housed in the housing member 221 (space portion 222). Accordingly, the bicycle 220 does not need to be strictly provided with the length of the second electric cord 174 of the auxiliary power output unit 170 and the length of the electric cord 191 of the battery unit 190, so that the working efficiency is improved and the parts are further improved. The defect rate can be reduced.

  In the bicycle 220, the surplus portion on the distal end side of the second electric cord 174 of the auxiliary power output unit 170 is stored in the storage member 221 (space portion 222) and / or stored in the storage member 221 (space portion 222). Instead of being housed, the surplus portion on the proximal end side of the second electric cord 174 of the auxiliary power output unit 170 is bent into the space 200 formed by the lower surface portion of the down tube portion 12 and the protruding pieces 57 and 57. May be stored. In such a case, the bicycle 220 can flexibly provide the length of the second electric cord 174 of the auxiliary power output unit 170 and the length of the electric cord 191 of the battery unit 190, and work efficiency is further improved. Furthermore, the defect rate of parts can be further reduced.

  Further, the storage member 221 is not limited to be provided at a corner portion formed by the upper surface portion of the back tube portion 13 and the rear surface portion of the seat tube 15, and the back tube portion spaced apart from the rear surface portion of the seat tube 15. The space portion 222 may be formed so as to have a front surface portion 221 a instead of the rear surface portion of the seat tube 15.

  Further, the storage member 221 may be any member that has at least opposing pieces and the space part 222 is formed by a piece facing the upper surface portion of the back tube portion 13. It is also possible to adopt a configuration having only 221a and the back surface portion 221b, or a configuration having only a pair of opposing side surface portions 221c and 221c.

  Further, the bicycle 220 does not house the second output side connector 176 of the auxiliary power output unit 170 and the battery side connector 192 of the battery unit 190 in the storage member 221 (space 222), and the auxiliary power output unit 170. Only the surplus portion of the second electric cord 174 may be accommodated, or only the surplus portion of the electrical cord 191 of the battery unit 190 may be accommodated.

  Further, the bicycle 220 does not house the first output-side connector 175 of the auxiliary power output unit 170 and the switch-side connector 182 of the operation switch unit 180 in the space part 200, and the first output side 170 of the auxiliary power output unit 170 is not accommodated. Only the surplus portion of the electric cord 173 may be accommodated, or only the surplus portion of the electrical cord 181 of the operation switch unit 180 may be accommodated. In addition, the bicycle 220 has a surplus of the first output side connector 175 of the auxiliary power output unit 170, the switch side connector 182 of the operation switch unit 180, and the first electric cord 173 of the auxiliary power output unit 170 in the space 200. Neither the part nor the surplus part of the electric cord 181 of the operation switch unit 180 may be stored.

  Further, the bicycle 220 is not limited to providing the storage member 221 on the upper surface portion of the back tube portion 13, and is provided on the upper surface portion or the lower surface portion of the down tube portion 12 together with the upper surface portion of the back tube portion 13. Alternatively, it is provided on the upper surface portion of the down tube portion 12 instead of the upper surface portion of the back tube portion 13, and the first output side connector 175 of the auxiliary power output portion 170, the switch side connector 182 of the operation switch portion 180, the auxiliary power The surplus portion of the first electrical cord 173 of the output unit 170 and the surplus portion of the electrical cord 181 of the operation switch unit 180 may be accommodated, and only the surplus portion of the first electrical cord 173 of the auxiliary power output unit 170 is stored. May be stored, or only the excess portion of the electric cord 181 of the operation switch unit 180 may be stored. .

<4. Bicycle modification>
In addition, the bicycles 1, 210, and 220 to which the present invention is applied are not limited to the main tube 14 being made of a single hollow member, but a curved down tube and a straight back tube portion 13. The two parts may be joined by any conventionally known joining method such as welding. In such a case, manufacturing and processing can be performed more easily than processing and molding a single hollow member.

  Furthermore, the bicycles 1, 210, and 220 to which the present invention is applied are not limited to the so-called rear wheel drive in which the drive unit 50 drives the rear wheels 30 and 30, and the drive unit 50 is configured to be the front wheels 20 and 30. So-called front wheel drive for driving 20 may be used.

  Furthermore, the bicycles 1, 210 and 220 to which the present invention is applied may have a plurality of front wheels 20 and one or three or more rear wheels 30. Furthermore, the bicycles 1, 210 and 220 to which the present invention is applied may have one front wheel 20 and a plurality of rear wheels 30. Furthermore, the bicycles 1, 210 and 220 to which the present invention is applied may be a two-wheel bicycle having one front wheel 20 and one rear wheel 30.

  Furthermore, in the bicycles 1, 210, and 220 to which the present invention is applied, the storage members stored in the space portions 200, 212, and 221 are signals between the auxiliary power output unit 170 of the electric assist unit 160 and the operation switch unit 180. It is limited to an electric cord such as a wire cable or a power line cable, an electric cord such as a signal line cable or a power line cable between the auxiliary power output unit 170 and the battery unit 190, or a connector provided on these electric cords. Instead of this, various other electric cords and connectors of the electric assist unit 160 may be used. Further, the storage members stored in the space portions 200, 212, and 221 are other electrical cords and connectors other than the electric assist unit 160, such as electrical cords and connectors between a lighting device such as a front light extinguisher and a taillight and a power source. May be.

DESCRIPTION OF SYMBOLS 1 Bicycle, 10 main frame, 10a 1st main frame, 10b 2nd main frame, 11 Head tube, 12 Down tube part, 12a Down slope part, 12b Up slope part, 12c Minimum ground height position, 12d Drainage port , 13 Back tube portion, 13a Rear end surface, 14 Main tube, 14a First wire opening portion, 14b Second wire opening portion, 15 Seat tube, 15a Seat reinforcement tube, 15b Electric assist mounting tube, 16 First reinforcement Tube, 17 rear tube, 18 second reinforcing tube, 19 loading platform tube, 20 front wheel, 20a wheel, 20b tire, 30 rear wheel, 30a wheel, 30b tire, 40 operation unit, 41 control tube, 42 handle, 42a Stem, 42b Grips Part, 43 front fork, 45 front wheel bearing box, 46 front wheel shaft, 47 stopper part, 50 drive part, 53 crank, 54 pedal, 55 endless chain, 56 auxiliary sprocket, 57 projecting piece, 58 chain cover, 59 shaft support part, 60 rear loading platform, 61 front loading platform, 62 accommodating section, 63 opening, 70 front wheel brake, 71 front wheel brake wire, 72 front wheel brake lever, 80 saddle, 80a saddle strut pipe, 81 backrest section, 82 fixing tool, 90 footrest Member, 100 rear wheel drive shaft, 100a first rear wheel drive shaft, 100b second rear wheel drive shaft, 100c differential gear, 110 rear wheel brake, 111 rear wheel brake wire, 112 rear wheel brake lever, 120 for general use Two-wheeled bicycle, 120a steering wheel, 121 bicycle parking rack, 1 22 Parking space, 123 Storage passage, 130 Uphill slope, 140 Bicycle, 140a Vertical line, 140b side, 150a Vertical line, 150b side, 160 Electric assist unit, 170 Auxiliary power output unit, 171 Bottom bracket, 171a Crankshaft, 171b Cup portion, 172 Electric motor, 173 First electric cord, 174 Second electric cord, 175 First output side connector, 176 Second output side connector, 180 Operation switch portion, 181 Electric cord, 182 Switch side Connector, 183 Band fixture, 190 Battery part, 191 Electrical cord, 192 Battery side connector, 193 Battery holder, 194 Band fixture, 200 Space part, 210 Bicycle, 211 Storage member, 211a Front part, 211b Rear part, 211c side surface, 211e bottom surface, 212 space, 213 opening, 220 bicycle, 221 storage member, 221a front surface, 221b back surface, 221c side surface, 221d top surface, 222 space, 223 opening,

Claims (4)

Comprising opposing pieces integrally provided on a second frame extending rearward from a first frame to which a front wheel is attached;
The bicycle, wherein the second frame has a space formed by the second frame and the opposing pieces.   The bicycle according to claim 1, wherein the opposing pieces are provided on a lower surface portion of the second frame.   The bicycle according to claim 2, wherein a shaft support portion that supports a crankshaft is provided between the opposing pieces.   The space includes a connector that connects a motor that outputs auxiliary power for assisting the pedaling force, an operation unit that operates the motor, and / or a battery that supplies power to the motor. The bicycle according to any one of claims 1 to 3, wherein the bicycle is characterized.

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