JPH09286366A - Electric bicycle battery device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to improve the battery unit by improving the mountability of the battery unit, improving the power supply terminal, and improving the battery case. Therefore, a convex portion is provided at a lower end portion of a battery storage concave portion provided in the middle of the frame of the electric bicycle, and a concave portion having a shape matching the convex portion is provided at a lower end portion of the battery unit, and a cross section between the convex portion and the concave portion. The shape is formed in an arc shape.
In addition, a pair of power supply terminals is positioned on both sides of the frame in the battery storage recess. Further, the battery unit accommodated in the battery accommodating recess is configured to have a cylindrical battery and a battery case portion formed in an inverted trapezoidal shape in the longitudinal direction, and when the batteries are accommodated in the battery case portion, the number of rows in the lower row is increased. One less than the number of rows and arranged in a bale stacking state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery device for an electric bicycle, and more particularly to an electric bicycle for improving the battery device by improving the mountability of a battery unit, improving a power supply terminal, and improving a battery case. The present invention relates to a battery device.

[0002]

2. Description of the Related Art In a bicycle, an electric motor that operates in response to a pedal rotation speed (also referred to as "crank shaft rotation speed") driven by human power is provided, and the driving force of this electric motor is used as auxiliary power. There is an electric bicycle (also called an "auxiliary power bicycle") that does. The operation of the electric motor is controlled (also referred to as “motor control”) by an electronic control unit (ECU, controller) incorporating various circuits.

[0003]

In the conventional electric bicycle, as shown in FIGS. 18 and 19, a battery storage recess 144 is provided in the middle of the frame 104 of an electric bicycle (not shown), and the battery storage recess 144 is provided with a battery storage recess 144. The unit 138 is stored.

At this time, the battery storage recess 144
When the battery unit 138 is stored in the battery unit 138, the recess 100 </ b> A formed at the lower end portion of the battery storage recess 144 and the protrusion 10 formed at the lower end portion of the battery unit 138.
It is necessary to fit with 0B.

As a result, when positioning the battery unit, a special structure is required separately, the structure is complicated, the manufacturing is difficult and the cost is high, and it is economically disadvantageous, and the battery unit positioning means is also provided. Therefore, there is a problem that the battery unit and the battery accommodating recess are enlarged in size.

Further, as shown in FIGS. 18 and 19, when the battery storage recess 144 is formed in the middle of the frame 104 of the electric bicycle (not shown), a rectangular recess 100A is formed at the lower end portion of the battery storage recess 144, A pair of power supply terminals 262 including + (plus) poles and − (minus) poles are provided on the same plane at the bottom surface of the recess 100A.

However, in general, in an electric bicycle,
The space was limited and it was difficult to secure a planar shape, and the space was not effectively used, and improvements were expected.

Further, as shown in FIG. 20, an electric bicycle 30
The battery unit 338 accommodated in the second battery accommodating recess 344 has a plurality of small 2V batteries 392 connected in series, for example, to ensure a high voltage.

At this time, conventionally, as shown in FIG. 21, after the battery 392 is arranged in the lower stage, the battery 3 in the lower stage is
The upper battery 39 to match the vertical center line of the battery 92a.
2b is provided, and the terminal 396 of each battery 392 is wired 3
It is connected at 98.

The battery 3 of the battery unit 338
The battery case portion 394 accommodating the battery 92 is
It is determined by the arrangement state of 92, and as shown in FIGS. 22 and 23, it is formed in a rectangular parallelepiped shape having an internal space.

As a result, when the batteries are housed in the battery case portion of the battery unit, they are stacked so as to coincide with the vertical center line of the lower battery and the upper battery, and the height of the battery case portion for housing the batteries is high. That is, the height of the battery unit becomes large, the space efficiency is poor, and the battery must be inserted horizontally when the battery unit is housed in the battery case (see FIG. 23), resulting in poor workability. is there.

Further, when the battery unit is stored in the battery storage recess of the electric bicycle, the workability is poor due to the shape of the battery case portion, and the balance of the electric bicycle is poor, which is disadvantageous in practical use.

[0013]

Therefore, in order to eliminate the above-mentioned inconvenience, the present invention utilizes an electric bicycle in which the driving force from an electric motor is used as auxiliary power corresponding to the pedal rotation speed driven by human power. In the frame of the electric bicycle, a battery storing recess for storing the battery unit is provided, a convex portion is provided at a lower end portion of the battery storing concave portion, and a concave portion having a shape matching the convex portion is provided at a lower end portion of the battery unit. Further, it is characterized in that the convex portion and the concave portion are formed in an arc-shaped cross-sectional shape.

Further, in an electric bicycle which uses a driving force from an electric motor as auxiliary power corresponding to a pedal rotation speed driven by human power, a head pipe on a front wheel side, a seat pipe and a head on a saddle side of the electric bicycle. A frame having a main pipe that connects the pipe and the seat pipe is provided, a battery accommodating recess for accommodating a battery unit is provided in the middle of the frame, and a pair of power supply terminals are located on both sides of the frame in the battery accommodating recess. It is characterized by being configured.

Further, in an electric bicycle which uses the driving force from the electric motor as auxiliary power corresponding to the pedal rotation speed driven by human power, a battery storing recess is formed in the middle of the frame of the electric bicycle, and the battery storing is formed. The battery unit housed in the recess is configured to have a cylindrical battery and a battery case portion formed in an inverted trapezoidal shape in the longitudinal direction, and when storing the batteries in the battery case portion, the number of lower rows is set to the upper row. 1 than the number of
It is characterized in that it is arranged in a bale-stacked state with a small number of pieces.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION
When the battery unit is stored in the battery storage recess of the electric bicycle, the battery unit is formed at the lower end portion of the battery unit while the lower end portion of the battery unit slides on the protruding portion formed at the lower end portion of the battery storage recess. The recessed portion is engaged, the structure is simple, and the positioning workability is improved.

Further, when the pair of power supply terminals are provided, they are positioned on both sides of the frame in the battery accommodating concave portion to effectively utilize the limited space.

Further, when accommodating the cylindrical batteries in the battery case portion of the battery unit formed in an inverted trapezoidal shape, the number of rows in the lower row is one less than the number of rows in the upper row, and they are arranged in a bale stacking state. Reduce the height of the battery case that stores the battery, that is, the height of the battery unit,
In addition to improving space efficiency, it also facilitates storage in the battery case, and the inverted trapezoidal battery case provides good workability and balance between the electric bicycle.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;

FIGS. 1 to 4 show a first embodiment of the present invention. In FIG. 4, 2 is an electric bicycle.

The frame 4 of the electric bicycle 2 includes a head pipe 6 located at the front of the head and a thick main pipe 8
A pair of left and right bridge pipes (not shown) extending obliquely rearward and downward and extending substantially horizontally rearward from the vicinity of the rear end of the main pipe 8 are connected to an intermediate portion of the seat pipe 10 provided in the vertical direction. A pair of left and right seat stays 12 extending obliquely downward and rearward from the upper end of the seat pipe and a pair of left and right chain stays 14 extending rearward from the lower end of the seat pipe 10 are connected via a rear end 16.

The head pipe 6 has a front wheel 18
A front fork 20 that supports the shaft is pivotally supported together with a handlebar 22, a basket 24, and the like, and a rear wheel 26 is pivotally supported on the rear end 16 at the rear end of the frame 4. Further, a saddle 28 is attached to the upper end of the seat pipe 10.

On the other hand, a drive assisting device (not shown) incorporating an electric motor (not shown) is fixed to the frame 4, that is, to the main pipe 8.

A crankshaft 30 extending in the vehicle width direction is rotatably supported by the drive assisting device, cranks 32 are fixed to both ends of the crankshaft 30, and a pedal 34 is provided at the tip thereof. A drive sprocket (not shown) located on the right side of the drive assist device is mounted on the crankshaft 30. The drive sprocket and the rear wheel 2 are mounted on the crankshaft 30.
A chain 36 is wound between the driven sprocket (not shown) provided on the No. 6 and.

The crankshaft 30 is rotationally driven by an occupant sitting on the saddle 28 by stepping on the pedal 34 with his / her foot. In addition, a combination force device (not shown) is built in the drive assist device together with the electric motor. This combination device combines the rotational force of the crankshaft 30 and the drive assist force of the electric motor, and the resultant force is used as a drive sprocket. It is designed to output. The drive sprocket rotates in the same direction as the crankshaft 30, and this rotation is transmitted to the driven sprocket via the chain 36, and the rear wheel 26 is driven. A control device (not shown) for adjusting the output of the electric motor is provided above the drive assist device.

A battery unit 38 serving as a power source for driving the electric motor is mounted on the frame 4. The battery unit 38 is, for example, 15 small batteries (not shown) that are hermetically housed in a battery case portion 40 made of synthetic resin. It is arranged in a lying shape.

The main pipe 8 of the frame 4 and the drive assist device are covered with a frame cover 42 made of synthetic resin to improve the aesthetic appearance of the electric bicycle 2. This frame cover 42
A battery accommodating recess 44 is formed on the main pipe 8 so as to be recessed downward along the longitudinal direction, and the battery unit 38 is fitted into the battery accommodating recess 44.

The battery unit 38 is attachable to and detachable from the frame 4, and the battery unit 3 is charged at the time of charging.
8 can be removed and charging work can be performed in the house. A handle (not shown) for transportation is provided on the upper surface of the battery unit 38, and the handle is arranged substantially above the center of gravity of the battery unit 38.

An electronic control unit (ECU, controller) mounted on the electric bicycle 2 controls to use the driving force of the electric motor as auxiliary power corresponding to the pedal rotation speed of the pedal 34 driven by human power. Is what
A main switch (not shown) that is turned on / off so as to cut off the power supply from the small battery of the battery unit 38 is provided.

The control device includes a power supply circuit (not shown) connected to a small battery of the battery unit 38 via a main switch, and a control circuit (CPU) (not shown) connected to the power supply circuit. And a pedal rotation input circuit (not shown) that outputs an input signal from a pedal rotation speed sensor (not shown) that detects the pedal rotation speed to a control circuit, and a motor rotation speed sensor (not shown) that detects the rotation speed of the electric motor. Rotation input circuit (not shown) for outputting an input signal from the control circuit to the control circuit, and a motor drive circuit (not shown) connected to the control circuit for driving the electric motor.
And a current detection circuit (not shown) connected to the motor drive circuit and the control circuit, respectively.

The control circuit of the control device receives the signal from the pedal rotation speed sensor input via the pedal rotation input circuit and the signal from the motor rotation speed sensor input via the motor drive circuit. Is input, arithmetic processing is performed by these input signals, a signal is output to the motor drive circuit, and the motor rotation speed control of the electric motor is performed by the motor drive signal output from this motor drive circuit.

Further, a convex portion 46 is provided at a lower end portion of a battery accommodating concave portion 44 formed in the frame 4 of the electric bicycle 2.
And a concave portion 48 having a shape matching the convex portion 46 is provided at the lower end portion of the battery unit 38, and the convex portion 46 and the concave portion 48 have an arc-shaped cross section.

More specifically, as shown in FIG. 1, a semi-cylindrical convex portion 46 extending in the front-rear direction of the electric bicycle 2 is provided at the lower end of the battery accommodating concave portion 44 and a flat surface portion. The shape of the convex portion 46 can be a hemispherical shape or another shape other than the above-described semicylindrical shape.

Further, as shown in FIGS. 2 and 3, a concave portion 48 having a shape matching the convex portion 46 is formed at the lower end portion of the battery unit 38.

Next, the operation will be described.

Battery storage recess 44 of the electric bicycle 2
When the battery unit 38 is stored in the battery unit 38, the protrusion 46 formed at the lower end portion of the battery storage recess 44 is engaged with the recess 48 formed at the lower end portion of the battery unit 38 to position the battery unit 38. Is fulfilled.

At this time, the convex portion 46 extends in the front-rear direction of the electric bicycle 2 and is formed in a semi-cylindrical shape. The lower end portion of the battery unit 38 slides on the convex portion 46, and the concave portion 48 is easily engaged. Are combined.

This can be realized only by forming the convex portion 46 at the lower end portion of the battery housing concave portion 44 and the concave portion 48 at the lower end portion of the battery unit 38, the structure is simple, the manufacturing is easy, and the cost is low. Can be maintained at low cost, which is economically advantageous.

A convex portion 46 is provided at the lower end portion of the battery accommodating concave portion 44, and the battery unit 38 is provided.
Since the concave portion 48 is provided at the lower end portion, the lower end portion is used at the time of positioning, and the mounting state can be stabilized, which is practically advantageous.

Further, since the convex portion 46 and the concave portion 48 are formed in an arc-shaped cross section, the battery unit 3
8 is positioned, the battery unit 3 is placed on the convex portion 46.
The lower end portion of 8 slides, and the recess 48 is easily engaged, so that the positioning workability can be improved.

FIG. 5 shows a second embodiment of the present invention. In the second embodiment, portions that perform the same functions as those in the first embodiment will be described with the same reference numerals.

In the first embodiment described above, the convex portion 46 is formed at the lower end of the battery accommodating concave portion 44 and on the plane portion, but the characteristic feature of the second embodiment is that the bridge pipe connecting to the main pipe 8 is connected. The outer peripheral surface portion of 52 is used as the convex portion 54.

That is, as shown in FIG. 5, a bridge pipe 52 extending substantially horizontally rearward from the vicinity of the rear end of the main pipe 8 is provided in the main pipe 8 of the electric bicycle (not shown).
The bridge pipe 52 is disposed toward a seat pipe (not shown), and a part of the outer peripheral surface of the bridge pipe 52 is used as a convex portion 54. The concave portion 48 formed at the lower end portion of the battery unit 38 is engaged with the convex portion 54. It is a combination.

By doing so, the labor for forming the convex portion 54 can be saved, the structure can be further simplified, the manufacturing can be facilitated, the cost can be kept low, and it is economically advantageous.

Also, the convex portion 54 and the battery unit 3
Due to the concave portion 48 of the lower end portion of 8, the lower end portion is used at the time of positioning, and the mounting state can be stabilized as in the first embodiment described above, which is practically advantageous.

Further, since the convex portion 54 and the concave portion 48 are formed in an arc-shaped cross section, the battery unit 3
When positioning 8, the same as in the first embodiment described above,
The lower end portion of the battery unit 38 slides on the convex portion 54,
The recesses 48 are easily engaged, and the workability of positioning can be improved.

6 to 9 show a third embodiment of the present invention.

The feature of this third embodiment is that a pair of power supply terminals 62 are positioned on both sides of the frame 4 in the battery accommodating recess 44.

That is, a power supply terminal 62 for receiving (collecting) power for operating an electric motor (not shown) and a control device (not shown) of an electric bicycle (not shown),
(Plus) pole terminal 62-1 and- (minus) pole terminal 62
And -2.

Then, the positive pole terminal 62-1 and the negative pole terminal 62
-2 has the same shape, and only one of them, for example, the structure of the + pole terminal 62-1 will be described as +
The pole terminal 62-1 is, as shown in FIG. 8, an electrical insulator (also referred to as an “insulator”) 64 formed in a plate shape from a resin or the like, and a conductive material that is inserted or screwed into the electrical insulator 64. It is composed of a rod-shaped terminal 66 such as brass having high properties. Further, a reliable silver contact 68 is welded to the tip portion of the rod-shaped terminal 66 when the current is intermittent.

As described above, in the power supply terminal 62, the + pole terminal 62-1 and the − pole terminal 62-2 have the same shape, but when the − pole terminal 62-2 is dropped to GND, ,
This can be dealt with by changing the electric insulator 64 to a conductive one.

When the power supply terminal 62 is attached, the bracket 70 is welded to the frame 4 in the battery accommodating recess 44, and the positive electrode terminals 6 are provided at both ends of the bracket 70.
2-1 and the negative electrode terminal 62-2 are tightened by a tightening tool 72 such as a tightening screw or a bolt.

At this time, as shown in FIG.
The lead wire 74 is screwed to the −1 and − pole terminals 62-2. When attaching the lead wire 74, the lower portions of the positive electrode terminal 62-1 and the negative electrode terminal 62-2 are formed in a socket shape so that one-touch attachment is possible and the attachability can be improved.

Reference numeral 76 is a contact terminal provided on the battery unit 38 so as to come into contact with the power supply terminal 62 composed of the positive electrode terminal 62-1 and the negative electrode terminal 62-2.

By arranging the pair of power supply terminals 62 on both sides of the frame 4 in the battery accommodating recess 44, it is possible to effectively utilize the limited space, which is advantageous in practical use, and the pair of power supply terminals 62 can be used practically. The power supply terminals 62 are located on both sides of the inclined frame 4, the insulation between the + pole terminal 62-1 and the − pole terminal 62-2 is high, and it is effective when water or the like is easily attached, and reliable power supply is possible. Is.

FIG. 10 shows a fourth embodiment of the present invention.

The feature of the fourth embodiment is that a pair of power supply terminals 82 are attached to a bracket 84 for mounting the frame 4.
The point is that they are integrally formed.

That is, as shown in FIG. 10, the electrical insulator portion 86 is integrally formed on the bracket 84, and the rod-shaped terminal 88 is attached to the electrical insulator portion 86 to integrate the pair of power supply terminals 82. To form.

As a result, the power supply terminal 82 consisting of the + pole terminal and the − pole terminal is surely positioned, which is advantageous in practical use, the number of parts can be reduced, the cost can be reduced, and it is economical. Is advantageous to.

Further, by arranging the pair of power supply terminals 82 on both sides of the frame 4 in the battery accommodating recess of the electric bicycle, the limited space can be effectively utilized as in the third embodiment. When the pair of power supply terminals 82 are located on both sides of the inclined frame 4 and are highly practical, and the insulation of the power supply terminals 82 composed of the + pole terminal and the − pole terminal is high and water or the like is easily attached It becomes effective and reliable power supply is possible.

11 to 17 show a fifth embodiment of the present invention.

The feature of the fifth embodiment is that the battery unit 38 accommodated in the battery accommodating recess 44 formed in the frame 4 of the electric bicycle 2 is shaped like a cylindrical battery 92 in the shape of an inverted trapezoid in the longitudinal direction. The battery case portion 94 is formed, and when the batteries 92 are housed in the battery case portion 94, the number of rows in the lower row is one less than that in the upper row and arranged in a bale stacking state. There is a point.

That is, the battery unit 38 is
The battery unit 38 has a battery case portion 94 formed in an inverted trapezoidal shape with respect to the longitudinal direction of the battery unit 38 and a horizontal plane, and a plurality of small cylindrical batteries 92 housed in the battery case portion 94. Case part 94
16 is composed of an upper case 94-1 as shown in FIG. 16 and a lower case 94-2 as shown in FIG. 17 that engages with the upper case 94-1. The upper case 94-1 and the lower case 94-2 make the battery An inverted trapezoidal shape is realized with respect to the longitudinal direction of the unit 38 and the horizontal plane.

Further, as shown in FIG. 12, the battery unit 38 is formed in a tapered shape in which both sides gradually taper toward the tip end portion.

Further, when the batteries 92 are stored in the battery case portion 94, for example, when the total number of the batteries 92 is 15, the number of the batteries 92a in the lower row is 7 and the number of the batteries 92b in the upper row is 92b. The number of is set to 8.

When the battery 92 is housed in the battery case portion 94, the cylindrical lower batteries 92a-1, 92a-2, ... Are arranged in contact with each other as shown in FIG. After, for example, the lower battery 9
2a-1 and 92a-2 are arranged so that the vertical center line of the upper battery 92b-2 is aligned with the outer peripheral contact portion, and the so-called bale stacking state is established, and the terminal 96 of each battery 92 is wired 9.
8 is connected.

By the way, when the battery 92 is stored in the battery case portion 94 of the battery unit 38, the height of the battery case portion 94 for storing the battery 92 after stacking the lower battery 92a and the upper battery 92b. That is, the height of the battery unit 38 can be reduced, space efficiency can be improved, and storability in the battery case portion 94 can be improved.

When the battery unit 38 is stored in the battery storage recess 44 of the electric bicycle 2, the workability is good and the balance of the electric bicycle is good due to the inverted trapezoidal shape of the battery case. It is advantageous.

Further, since the battery unit 38 is formed in a tapered shape in which both sides gradually taper toward the tip portion, the weight of the portion close to the pedal can be increased and the weight balance of the electric bicycle can be increased. Can be further improved.

[0070]

As is apparent from the above detailed description, according to the present invention, an electric bicycle in which the driving force from the electric motor is used as auxiliary power in accordance with the pedal rotation speed driven by human power is used. A battery housing recess for housing the battery unit is provided in the middle of the frame, a convex portion is provided at a lower end portion of the battery housing concave portion, a concave portion having a shape matching the convex portion is provided at a lower end portion of the battery unit, and the convex portion and the concave portion are formed. Since the sectional shape of the battery is formed in an arc shape, it can be realized only by forming the convex portion at the lower end portion of the battery housing concave portion and the concave portion at the lower end portion of the battery unit, the configuration is simple, the manufacturing is easy, and the cost is low. Can be maintained at low cost, which is economically advantageous. Further, by providing a convex portion at the lower end portion of the battery storage concave portion and a concave portion at the lower end portion of the battery unit, the lower end portion is used during positioning, and the mounting state can be stabilized, which is practically advantageous. is there. Further, since the convex portion and the concave portion are formed in an arc-shaped cross-section, the lower end portion of the battery unit slides on the convex portion when the battery unit is positioned, so that the concave portion is easily engaged. Workability can be improved.

Further, when the convex portion is provided with a head pipe on the front wheel side, a seat pipe on the saddle side, and a bridge pipe and a main pipe which communicate with the seat pipe, the outer peripheral surface portion of the bridge pipe is used. With the configuration, the labor for forming the convex portion can be omitted, the configuration can be further simplified, the manufacturing is facilitated, the cost can be kept low, and it is economically advantageous.

Furthermore, in an electric bicycle that uses the driving force from the electric motor as auxiliary power corresponding to the pedal rotation speed driven by human power, in the head pipe of the front wheel side of the electric bicycle and the seat pipe and head pipe of the saddle side. Since a frame having a main pipe that connects the sheet pipe and the seat pipe is provided, a battery storage recess for storing a battery unit is provided in the middle of the frame, and a pair of power supply terminals are positioned on both sides of the frame in the battery storage recess. , It is possible to effectively use the limited space, is practically advantageous, and is effective when the pair of power supply terminals are located on both sides of the inclined frame, the insulation of the power supply terminals is high, and water or the like is easily attached, A reliable power supply is possible.

Furthermore, if the pair of power supply terminals are formed integrally with the frame mounting bracket, the power supply terminals can be reliably positioned, which is practically advantageous and the number of parts is reduced. It is possible, the cost can be reduced, and it is economically advantageous.

Further, in an electric bicycle that uses the driving force from the electric motor as auxiliary power corresponding to the pedal rotation speed driven by human power, a battery storage recess is formed in the middle of the frame of the electric bicycle, and the battery storage recess is formed in the battery storage recess. The battery unit to be housed is configured to have a cylindrical battery and a battery case part formed in an inverted trapezoidal shape in the longitudinal direction, and when the batteries are housed in the battery case part, the number in the lower row is the number in the upper row. Since it is configured to be arranged one less than the other and arranged in a bale stacking state, when storing the battery in the battery case portion of the battery unit,
It is possible to reduce the height of the battery case portion after stacking the lower battery and the upper battery, that is, the height of the battery unit, which improves space efficiency and
Storability in the battery case portion 94 can also be made good. Further, when the battery unit is stored in the battery storage recess of the electric bicycle, the workability is good and the balance of the electric bicycle is good because of the inverted trapezoidal shape of the battery case portion, which is practically advantageous.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a battery unit mounting portion of an electric bicycle showing a first embodiment of the present invention.

FIG. 2 is a schematic perspective view of an end portion of a battery unit.

FIG. 3 is a schematic sectional view of an end portion of a battery unit.

FIG. 4 is a schematic view of an electric bicycle.

FIG. 5 is a schematic view of a battery unit mounting portion of an electric bicycle showing a second embodiment of the present invention.

FIG. 6 is a schematic perspective view of a battery unit attachment portion of an electric bicycle showing a third embodiment of the present invention.

FIG. 7 is an enlarged view of a battery unit mounting portion of the electric bicycle.

FIG. 8 is a perspective view of a power supply terminal.

FIG. 9 is a cross-sectional view showing a mounting state of a power supply terminal on a bracket.

FIG. 10 is a schematic perspective view of a power supply terminal of an electric bicycle showing a fourth embodiment of the present invention.

FIG. 11 is a schematic view of an electric bicycle showing a fifth embodiment of the present invention.

FIG. 12 is a plan view of a battery unit.

FIG. 13 is a schematic diagram showing an arrangement state of batteries.

FIG. 14 is a schematic perspective view of a battery case portion of the battery unit.

FIG. 15 is a schematic perspective view showing a state in which a battery is stored in a battery case portion of a battery unit.

FIG. 16 shows an upper case of a battery case portion of a battery unit, (a) is a front view, (b) is a plan view,
(C) is a bottom view, (d) is a left side view from the arrow D,
(E) is a right side view from the arrow E, (f) is a sectional view taken along the line FF, and (g) is a sectional view taken along the line GG.

FIG. 17 shows a lower case of a battery case portion of a battery unit, (a) is a front view, (b) is a plan view,
(C) is a right side view, (d) is a left side view from the arrow D,
(E) is a sectional view taken along line EE, (f) is a sectional view taken along line FF, (g) is a sectional view taken along line GG, and (h) is H.
It is sectional drawing by the -H line.

FIG. 18 is a schematic perspective view of a battery unit mounting portion of the electric bicycle showing the first conventional technique of the present invention.

FIG. 19 is a schematic front view of a battery unit mounting portion.

FIG. 20 is a schematic view of an electric bicycle showing a second prior art of the present invention.

FIG. 21 is a schematic view showing an arrangement state of batteries.

FIG. 22 is a schematic perspective view of a battery case portion of the battery unit.

FIG. 23 is a schematic perspective view showing a state in which a battery is stored in a battery case portion of a battery unit.

[Explanation of symbols]

 2 Electric bicycle 4 Frame 6 Head pipe 8 Main pipe 10 Seat pipe 16 Rear end 18 Front wheel 22 Handlebar 26 Rear wheel 28 Saddle 34 Pedal 36 Chain 38 Battery unit 40 Battery case part 42 Frame cover 44 Battery storage recess 46 Convex part 48 Concave part

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 3, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

[Fig. 2]

[Figure 3]

[Figure 8]

[Figure 9]

FIG.

FIG. 4

[Figure 5]

FIG. 6

FIG. 7

FIG. 10

FIG. 11

FIG.

FIG. 13

FIG. 14

FIG.

FIG. 16

FIG.

FIG.

FIG.

FIG.

FIG.

FIG. 21

FIG. 23

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiko Akashiba 300, Takatsuka-cho, Hamamatsu City, Shizuoka Prefecture Suzuki Stock Company

Claims (5)

[Claims] 1. In an electric bicycle that uses a driving force from an electric motor as auxiliary power corresponding to a pedal rotation speed driven by human power, a battery storing recess for storing a battery unit is provided in the middle of a frame of the electric bicycle. A convex portion is provided at a lower end portion of the battery accommodating concave portion, a concave portion having a shape matching the convex portion is provided at a lower end portion of the battery unit, and the convex portion and the concave portion are formed in an arc shape in cross section. Battery equipment for electric bicycles. 2. The outer peripheral surface portion of the bridge pipe is used as the protrusion when the head pipe on the front wheel side, the seat pipe on the saddle side, and the bridge pipe and the main pipe that communicate with the seat pipe are provided. The battery device for an electric bicycle according to claim 1, which is a convex portion. 3. An electric bicycle that uses a driving force from an electric motor as auxiliary power corresponding to a pedal rotation speed driven by human power, in which a head pipe on a front wheel side, a seat pipe and a head on a saddle side of the electric bicycle. A frame having a main pipe that connects the pipe and the seat pipe is provided, a battery accommodating recess for accommodating a battery unit is provided in the middle of the frame, and a pair of power supply terminals are located on both sides of the frame in the battery accommodating recess. A battery device for an electric bicycle, which has a configuration. 4. The battery device for an electric bicycle according to claim 3, wherein the pair of power supply terminals are a pair of power supply terminals integrally formed with a frame mounting bracket. 5. In an electric bicycle that uses a driving force from an electric motor as auxiliary power corresponding to a pedal rotation speed driven by human power, a battery storing concave portion is formed in the middle of a frame of the electric bicycle, and the battery storing portion is formed. The battery unit housed in the recess is configured to have a cylindrical battery and a battery case portion formed in an inverted trapezoidal shape in the longitudinal direction, and when storing the batteries in the battery case portion, the number of lower rows is set to the upper row. A battery device for an electric bicycle, characterized in that it is configured to be arranged in a bale-stacked state in which the number is one less than the number of the above.