JP2670244B2 - Mobile equipment drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile device drive device for driving wheels of a mobile device such as a bicycle when the mobile device is mounted on the mobile device.

[0002]

2. Description of the Related Art In a mobile device such as a bicycle, traveling load is generally large when climbing a hill. Therefore, a deceleration means is provided to reduce the traveling load. Further, in recent years, it has been proposed to reduce the addition when climbing a hill by a mechanism that assists the traveling driving force. For example, in the case of a bicycle,
As shown in FIG. 6, a drive force assisting mechanism 3 provided in a crank chamber 2 at the center of the frame 1 assists the drive force. The driving force assisting mechanism 3 utilizes the driving force of the electric motor, and senses the stepping force (pedaling force) of the pedal 4 to automatically change the output of the electric motor to generate an appropriate amount of driving force. Is to happen.

[0003]

By the way, for sensing the pedaling force in the bicycle, the use of a piezoelectric element or the like installed in the crank chamber 2 is often used, but the entire sensing mechanism becomes expensive and the sensing is also difficult. The control mechanism that processes the signal and controls the driving force of the driving force assisting mechanism 3 becomes complicated, which causes the driving force assisting mechanism 3 to further increase in size and cost.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a light-weight and small-sized mobile device driving apparatus which is inexpensive.

[0005]

In order to solve the above-mentioned problems, the present invention uses a pedaling force acting on a pedal as a driving source.
A mobile device drive device that drives the wheels of a mobile device such as a bicycle that travels, and detects the rotation of a chain endlessly mounted between a drive gear and a driven gear. Rotation detection mechanism, a tension detection mechanism that detects the tension acting on the chain, a drive mechanism that transmits the power generated by the prime mover to the wheels of the moving equipment as a rotation driving force, and these rotation detection mechanism and tension detection mechanism. And a control unit that controls the drive mechanism based on the signal from
And a judgment step made based on the signal from the tension detection mechanism.
Force and strong, medium, and weak settings preset in the control unit
Compared with the treading force, the determined treading force is greater than the strongest set treading force.
When strong, the strongest of the five preset strength levels
The electric motor that uses the power of the set output of
Output the output signal from the
When the pedal force is weaker than the strong pedal force and stronger than the medium pedal force
If the judgment pedal force judged last time is stronger than the strongest set pedal force
If it is 2nd / weak, the 3rd strength setting output is
Output the output signal from the motor,
Is weaker than the medium set pedal force and stronger than the weak set pedal force
Is if the judgment pedal force judged last time is stronger than the set pedal force
If it is 4th / weak, the 5th strength setting output
Microcomputer that outputs the output signal to be output from the computer
The provision of a pewter in the control unit is a means for solving the above-mentioned problems.

[0006]

According to the mobile device driving apparatus of the present invention, when the rotation detecting mechanism detects the rotation of the chain, the rotational driving force transmitted to the wheels by the driving mechanism is generated according to the tension of the chain detected by the tension detecting mechanism. The control unit controls. The rotational driving force of the drive mechanism is determined based on the relationship between the rotational torque acting on the chain and the rotational driving force of the wheels preset in the control unit in consideration of the size of the wheels and the like. The rotational torque acting on the chain is determined based on the relationship between the tension, the length of the chain, the gear ratio between the drive gear and the driven gear, and the like, which are preset in the control unit. In a bicycle (a so-called hybrid bicycle) in which a drive assisting force is applied to wheels by the mobile device drive device of the present invention, the rotational drive force transmitted to the wheels by the drive mechanism is relatively limited with respect to the traveling speed of the bicycle. When the running speed or the like of the bicycle determined from the tension and the moving speed of the chain reaches the limit value, the control unit operates to adjust or stop the transmission of the rotational driving force to the wheels.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a mobile device driving apparatus of the present invention will be described below with reference to FIGS. Reference numeral 10 in the figure
Is a mobile device drive device of the present embodiment. As shown in FIG. 1, the mobile device drive device 10 is mounted on a frame 11 of a bicycle as a mobile device. The mobile device drive device 10 includes a rotation detection mechanism 13 for detecting the rotation speed of a chain 12 endlessly mounted between a drive gear 12a of the bicycle and a driven gear (not shown), and a chain 12.
A tension detection mechanism 14 for detecting the tension acting on the bicycle and an electric motor 15 as a prime mover are mounted on the bicycle wheel 16
Drive mechanism 19 for transmitting the power generated by the electric motor 15 to the outer peripheral surface 18 of the rubber tire 17 of FIG.
And the rotation detection mechanism 13, the tension detection mechanism 14, and the drive mechanism 19, and the drive mechanism 1 based on the detection signals transmitted from the tension detection mechanism 14 and the rotation detection mechanism 13.
9 and a control unit 20 for transmitting an output signal.

The rotation detecting mechanism 13 and the tension detecting mechanism 14
The drive mechanism 19 and the drive mechanism 19 are integrated as a detection drive unit 21 as shown in FIGS. 1 and 2, and are detachably mounted on the frame 11 of the bicycle via a mounting bracket 22. The mounting member 22 is fixed to a portion of the fixing portion 23, into which a pillar for supporting a saddle (not shown) of the bicycle is inserted and fixed, near the crank chamber 11a. A pair of rotating plates 24 supporting the rotation detecting mechanism 13, the tension detecting mechanism 14, and the driving mechanism 19 are attached to the mounting bracket 22 by the pin 2
It is rotatably supported in the vertical direction via a shaft 5.

One of the rotating plates 24 is installed above the drive gear 12a. A front surface of the electric motor 15 is fixed to a portion of the rotating plate 24 near the pin 25, and a drive shaft 26 of the electric motor 15 is inserted from an insertion hole 27 formed in the rotating plate 24 to the rotating plate 24. Is projected on the outer surface side. The outer peripheral surface 1 of the rubber tire 17 of the bicycle wheel 16 is rotatably driven by the driving force of the electric motor 15 to the outside of the rotating plate 24 in the rotating radius direction of the electric motor 15.
The drive shaft 28 capable of transmitting the drive force to the wheels 16 by being pressed against the electric motor 8 has the axis line of the electric motor 1
5 is supported in parallel with the drive shaft 26.

The drive shaft 28 is composed of the shaft body 2
8a and the bush 28 on the outside of the shaft body 28a.
and a driving force transmission body 28c that is rotatably arranged via b. One end 29 of the drive shaft 28c is projected to the outer surface side of the rotary plate 24, and the other end 30 thereof is the other rotary plate 2 forming a pair with the rotary plate 24.
4 is supported. The motor body 31 of the electric motor 15 is fixed to the center of the other rotating plate 24.

At the tip of one end 29 of the drive shaft 28, a rotary bearing K is rotatably supported at the outer end of the rotary plate 24 in the rotational direction. The driving shaft 26 of the electric motor 15 and one end 29 of the driving force transmitting body 28c
A drive force transmission belt 32 for transmitting the drive force of the electric motor 15 to the drive force transmission body 28c is mounted between the and. The rotary bearing K cannot be removed from the rotary plate 24 and the cover 33 by a supporting means (not shown) outside the rotary plate 24 and the cover 33 mounted so as to cover the outer surface of the rotary plate 24. ,
Further, it is rotatably supported coaxially with the drive shaft 28. The electric motor 15, the drive shaft 28, and the driving force transmission belt 32 constitute the driving mechanism 19 of this embodiment.

The cover 33 has one rotating plate 2
4 is an air hole that covers substantially the entire outer surface extending from the tip of the protrusion 34 protruding outward in the radial direction of rotation to the vicinity of the pin 25, and is opened between the rotation plate 24 and the protrusion 34. An air flow path 36 is formed between 35 and the insertion clearance of the drive shaft 26 in the insertion hole 27 of the rotating plate 24. The electric motor 15 is a motor with a fan, and sucks the air in the air flow path 36 through the clearance in the insertion hole 27 at the time of driving. Therefore, at the time of driving, the electric motor 15 is moved from the air hole 35 to the insertion hole. Air flows toward 27 to cool the frictional heat generated by the rotation of the driving force transmission belt 32.

The motor body 3 of the electric motor 15
1, a rear end portion (upper side in FIG. 2) has a discharge hole (not shown) for discharging the sucked air toward the road surface, and
An exhaust cover 37 that protects the rear part of the motor body 31 is attached. The exhaust cover 37 reduces the influence of noise such as driving noise of the electric motor 15 and friction noise caused by the rotation of the driving force transmission belt 32.

The rotary bearing K has the speed detecting mechanism 1
3 are provided. The speed detecting mechanism 13 is axially supported by a shaft portion 38 projecting from the outer surface of the rotary bearing K with a rotary axis line parallel to the rotary plate 24, and the chain 1
The speed detection gear 39 (movable member) mounted on the driving force transmission side 12b (upper side in FIG. 1) of the second gear meshes with the chain 12, and the light emitting side element 40 and the light receiving side element 41 in the axial direction of the shaft portion 38. And a disk-shaped rotating plate 4 which is arranged between these light-emitting and light-receiving elements and rotates integrally with the speed detection gear 39.
2, the light emitting / receiving elements 40 and 41, and the rotating plate 42
And a light-shielding cover 43 that covers the installation area of.

A plurality of through holes 44 are formed at equal intervals on the circumference of the center of the rotary plate 42 in the radial direction around its own axis of rotation. The speed detecting mechanism 13 causes the light receiving side element 4 to emit the light emitted from the light emitting side element 40 passing through the through hole 44 by the rotation of the rotary plate 42 accompanying the rotation of the speed detecting gear 39.
When the light is received at 1, the light receiving side element 41 functions as an encoder for transmitting a light receiving signal as a digital signal to the control unit 20.

Further, since the speed detecting mechanism 13 is provided on the rotary bearing K which is rotatable with respect to the rotary plate 24, the entire speed detecting mechanism 13 rotates about the axis of the drive shaft 28. I have. Further, since the end portion of the shaft portion 38 is located in the vicinity of the central axis of the drive shaft 28, the speed detecting mechanism 13 roughly rotates around the drive shaft 28.

One end of a spring 45 forming a part of the tension detecting mechanism 14 is attached to the lower part of the center of the rotating plate 24. The tension detecting mechanism 14 includes a spring 45.
And an outer cylinder 46 that houses this spring 45, and this outer cylinder 46
Is inserted in the lower part of the outer cylinder 46 so as to be slidable in the axial direction of the outer cylinder 46, and the frame 11 of the bicycle.
Inner cylinder 4 whose lower end is pivotally supported by bracket 47 fixed to
8 is provided. The upper end of the outer cylinder 46 is provided in the lower part of the center of the rotating plate 24, and is rotatably suspended by a pin 49 that supports one end of the spring 45. An elongated hole 50 extending in the axial direction is opened at the lower end of the outer cylinder 46. The pin 51 fixed to the bracket 47 is inserted into the elongated hole 50. The other end of the spring 45 is attached to the pin 51.

The lower portion of the inner cylinder 48 is pivotally supported by the bracket 47 via the pin 51. As shown in FIGS. 1 and 3, a reflective photosensor 53 supported by a substrate 52 is provided at the center of the inner cylinder 48. The reflection type photo sensor 53 is attached inside the inner cylinder 48,
Light is emitted toward a reflection piece 55 attached to the inner wall surface of the outer cylinder 46 through a through hole 54 formed in the substrate 52, and light reflected by the reflection piece 55 can be received. The reflection pieces 55 are attached to a plurality of locations in the longitudinal direction of the outer cylinder 46 so as to be separated from each other. These reflection pieces 55 have different reflection characteristics.

In the tension detecting mechanism 14, when the tension of the driving force transmitting side 12b (upper side in FIG. 1) of the chain 12 changes, the speed detecting gear 39 moves up and down to function as a movable member, and the speed detecting gear 14 also moves. The outer cylinder 46 functions as a slide member that moves up and down relatively with respect to the inner cylinder 48 as the 39 is moved up and down. Here, the combination of the pair of the reflective photosensor 53 and the reflective piece 55 facing each other changes,
Due to the difference in the reflection characteristics of the reflection piece 55, the light reception signal transmitted from the reflection type photo sensor 53 to the control unit 20 changes. The reflective photosensor 53 and the reflective piece 55 function as relative position detecting means for detecting the relative position of the outer cylinder 46 and the inner cylinder 48.

When the tension on the driving force transmitting side 12b fluctuates and the speed detecting gear 39 moves up and down, the elastic force of the spring 45 causes the entire detection driving unit 21 to move up and down about the pin 25 as a pendulum motion. Since the speed detecting gear 39 is pressed against the driving force transmitting side 12b of the chain 12 and the meshing state of the speed detecting gear 39 with the driving force transmitting side 12b is always maintained, the tension of the chain 12 by the tension detecting mechanism 14 is The detection is made stable and the traveling speed of the chain 12 is also made stable. The vertical movement of the outer cylinder 46 is restricted within the range of the elongated hole 50.

A battery B and a variable output mechanism B1 for outputting the electric power of the battery B to the electric motor 15 based on a signal from the control unit 20 are attached to the central portion of the fixed portion 23 of the frame 11. I have. In this embodiment, the battery B and the variable output mechanism B1 may be installed at other places such as a bicycle carrier. Further, the variable output mechanism B1 is disposed separately from the battery B, and for example, the control unit 20
It may be integrated with.

As shown in FIG. 4, the control unit 20 has a digital counter 56 for counting the light receiving signal from the light receiving element 41 of the rotation detecting mechanism 13 per unit time.
An input interface 57 for replacing the light receiving signal of the reflection type photosensor 53 of the tension detecting mechanism 14 with a digital signal; and a microcontroller for transmitting a digital driving signal to the driving mechanism 19 based on the signals of the digital counter 56 and the input interface 57. Computer 58
And an output converter 59 for converting a signal from a microcomputer 58 into an analog signal, and a comparator 60 for outputting the converted signal to a variable output mechanism B1. Is fixed via a fixing metal fitting (not shown).

In the mobile device drive apparatus 10 of this embodiment, the detection drive unit 21 is brought into contact with the outer peripheral surface 18 slightly below the portion of the rubber tire 17 of the wheel 16 located on the frontmost side of the bicycle with the drive shaft 28. Setting the bicycle speed and pedaling force (chain 12
The rotation torque of the microcomputer 58
Controls the drive mechanism 19 to provide an appropriate rotational drive force from the drive shaft 28 to the bicycle wheels 16 to assist the drive force.

The traveling speed of the bicycle is determined by the rotation detection mechanism 1 described above.
The light receiving signal of the light receiving side element 41 of the digital counter 56
Is counted by the microcomputer 58, and is calculated by the microcomputer 58 based on this count signal. At this time, the microcomputer 58 controls the outer diameter of the wheel 16 and the drive gear 12
Data such as the gear ratio between a and the driven gear and the separation distance are set in advance, and the traveling speed is calculated in real time from these data and the count signal.

The pedaling force is the reflection type photo sensor 53.
The microcomputer 58 determines from the digital signal input by the input interface 57 based on the received light signal. Since the type of the received light signal of the reflection type photo sensor 53 indicates the insertion depth of the inner cylinder 48 into the outer cylinder 46, the elastic modulus of the spring 45 and the gear ratio between the drive gear 12a and the driven gear set in advance are set. In, the magnitude of the pedaling force is determined according to the type of the light receiving signal. Further, if different types of reflecting pieces 55 are arranged in multiple stages, the pedaling force can be determined more accurately.

The driving force of the driving mechanism 19 is determined by the microcomputer 58 from the traveling speed of the bicycle and the pedaling force of the pedal. That is, as shown in FIG. 5, when the rotation of the chain 12 can be detected by the signal from the digital counter 56 in step 61, the microcomputer 58 determines the pedaling force determined from the input signal from the input interface 57 (hereinafter, the determination pedaling force). Is referred to in step 62 as compared with the pedaling force preset in the microcomputer 58. Microcomputer 58
The treading force set in advance (hereinafter referred to as set treading force) is strong,
There are three types, medium and weak.

In step 62, the strength of the determined pedal effort is compared with the strongest of these three types of set pedal effort. If the judgment pedal force is stronger than the strongest of the set pedal forces, the routine proceeds to step 63, where the electric motor 15 outputs the strongest drive output (hereinafter, referred to as the set output) preset in five stages. Output signal. If the determined pedal effort is weaker than the strongest of the set pedal effort, the routine proceeds to step 64, where it is compared with the medium pedal strength of the set pedal effort.

In the comparison in step 64, when the determined pedal effort is stronger than the set pedal effort, the routine proceeds to step 65. In step 65, the data of the pedaling force determined last time is used, and when the determined pedaling force is stronger than the strongest set pedaling force, the process proceeds to step 66, in which the electric motor 15 outputs the output signal for outputting the second intensity setting output. send. If the pedaling force determined last time is weaker than the strongest setting output, step 67
Then, the electric motor 15 transmits an output signal for outputting the third strength setting output.

In the comparison in step 64, if the judgment pedal force is weaker than the set pedal force, the routine proceeds to step 68. In step 68, the determined pedal effort is compared with the weakest of the set pedal effort. In this comparison, if the determined pedal effort is greater than the set pedal effort, the routine proceeds to step 69. In step 69, the data of the pedaling force determined last time is used, and when the determined pedaling force is medium, the process proceeds to step 70, and the electric motor 15 transmits an output signal for outputting the setting output of the fourth strength. Proceeds to step 71 when pedal force is determined last is weaker than the set output medium, it transmits an output signal electric motor 15 outputs the set output of the fifth strength.

If the judgment pedal force is weaker than the set pedal force in the comparison in step 68, the process returns to step 61. When the rotation of the chain 12 is not detected in step 61, the process proceeds to step 72, and the drive output of the electric motor 15 is turned off.

Steps 63, 66, 67, 70, 7
The output signal of the microcomputer 58 in 1 is
As shown in FIG. 4, the variable output mechanism B is passed through the comparator 60 as a digital signal via the output converter 59.
Output to 1. The variable output mechanism B1 outputs a predetermined electric power to the electric motor 15 according to a signal from the microcomputer 58. A command of the rotation speed of the electric motor 15 is also added to the output signal of the microcomputer 58. The rotation speed of the electric motor 15 is monitored by a sensing means (not shown), fed back to the comparator 60, and adjusted within an appropriate range.

When the rotation speed of the wheel 16 is low, the rotation of the drive shaft 28 is relatively high with respect to the outer peripheral surface 18 of the rubber tire 17. By rotating in the clockwise direction in FIG. 1, the drive shaft 28 bites into the rubber tire 17 and gives a rotational driving force in a state where the frictional force is increased.
Further, when the pedaling force becomes large when the bicycle is first moving or climbing, the tension of the chain 12 increases and the speed detection gear 39 is pushed up, so that the drive shaft 28 bites into the rubber tire 17 more significantly. Therefore, when it is necessary to further assist the driving force of the mobile device driving device 10, the driving force transmission efficiency is improved.

The bite of the drive shaft 28 is caused by the entire drive unit 21 rotating about the pin 25 and the drive shaft 28 being displaced upward due to the increase in the tension of the chain 12.
Until the rubber plate contacts the rubber tire 17.
The speed detection mechanism 13 and the drive shaft 28 can move up and down in conjunction with each other. Further, when the drive shaft 28 bites into the rubber tire 17, the bite force causes the entire detection drive unit 21 to rotate further upward, and the speed detection mechanism 13 rotates together with the rotation bearing K around the axis of the drive shaft 28. It moves and is pulled forward (right side of FIGS. 1 and 2). Therefore, the speed detection mechanism 1
3 is suppressed from projecting to the rear of the drive unit 21, and the rotation region of the entire detection drive unit 21 can be reduced.

The biting of the drive shaft 28 accompanies the upward rotation of the detection drive unit 21, but this rotation amount is small and does not affect the meshing of the speed detection gear 39 with the chain 12. In addition, pulling the speed detecting mechanism 13 forward causes the weight of the speed detecting mechanism 13 itself and
This is performed stably by the forward displacement force transmitted from the speed detection gear 39 that meshes with the driving force transmission side 12b of the chain 12 that moves from the rear to the front.

When the traveling speed of the bicycle increases and the rotation of the drive shaft 28 becomes slower with respect to the outer peripheral surface 18 of the rubber tire 17, the drive shaft 28 moves toward the rubber tire 17.
Is pushed out in the direction of rotation and the contact is released.

The rotation speed of the wheels 16 increases and the wheels 16
When the rotation of the drive shaft 28 becomes slower than the rotation of, the drive shaft 28 is pushed out in the rotation direction of the rubber tire 17, and the contact is released.

According to the mobile device driving apparatus 10 of the present invention,
Since the microcomputer 58 has a structure in which the signals from the rotation detection mechanism 13 and the tension detection mechanism 14 are processed as digital signals, the control unit 20 can be made small and inexpensive. Therefore, since the entire mobile device driving device 10 can be configured to be lightweight and small, the operability of the bicycle is improved, and the carrying and movement of the bicycle other than during traveling can be easily performed. Also, the rotation detection mechanism 1
3 has a simple structure due to the fact that the signal transmitted to the control unit 20 is digital, so that it can be constructed in a small size and a light weight, and furthermore, it can be used as a sensing element or a detection signal transmission mechanism. It is not necessary to use a special product and can be constructed at low cost. Tension detection mechanism 14
Also, for the same reason as the rotation detection mechanism 13, it can be configured to be small, lightweight, and inexpensive.

Furthermore, since the drive mechanism 19 of the mobile device drive device 10 has a structure in which the drive mechanism 19 applies a drive force to the rubber tires 17 of the wheels 16, a rotational torque can be applied to the wheels 16 efficiently, and a small electric motor 15 is provided. Can be used.

As a result of the above, the mobile device drive apparatus 10 can be manufactured at a small size and at a low cost as a whole. Therefore, the running performance and maneuverability are good, and the reduction in kinetic energy during running due to the weight reduction makes it easier to ensure the braking performance of the bicycle and also improves the safety. In addition, the life of the battery B is extended due to the weight reduction, the downsizing of the electric motor 15 and the improvement of the driving force transmission efficiency, so that the charging cycle is extended and stable use is possible for a long period of time.

The weight of a prototype vehicle based on the mobile device driving device 10 of this embodiment is about 16 kg, which is about half as compared with a bicycle using a conventional driving force assist mechanism. In addition, in this prototype vehicle, the comparison of the traveling distances with the same degree of charging was about twice that of the conventional product.

In each of the above-mentioned embodiments, the mobile device driving device of the present invention is applied to a bicycle, but the driving force is applied via a chain mounted between the drive gear and the driven gear. As long as the mechanism is configured to transmit, it may be applied to a wheelchair or the like other than the bicycle. Further, in the above-described embodiment, the structure in which the tension of the chain 12 is detected stepwise by the tension detection mechanism 14 is shown. However, for example, a mechanism that constantly detects the tension in real time, such as a structure that measures a change in electric resistance. May be applied. in this case,
The detection accuracy of the tension of the chain 12 is improved, and the drive mechanism 1
Waste of the driving force of the driving motor 9 is reduced, the operation of the driving mechanism 19 is stabilized, and the life of the electric motor 15 is extended.

[0042]

As described above, according to the mobile device driving apparatus of the present invention, the pedaling force acting on the pedal is used as the driving source.
A mobile device driving device that drives the wheels of a mobile device such as a bicycle that travels in such a manner as to rotate a chain endlessly mounted between a drive gear and a driven gear. A rotation detection mechanism that detects the tension, a tension detection mechanism that detects the tension acting on the chain, a drive mechanism that transmits the power generated by the prime mover to the wheels of the moving equipment as a rotation driving force, and the rotation detection mechanism and the tension detection mechanism. The control unit that controls the drive mechanism based on the signals from
And is determined from the signal from the tension detection mechanism.
Judgment pedal force and strong, medium, and weak preset to the control unit
The set tread force is the strongest as the determined tread force is compared with the set tread force.
When the strength is stronger than that
The power of the strongest setting output of
The output signal output from the dynamic motor is output and the judgment is made.
The pedal effort is weaker than the strong pedal effort and stronger than the medium pedal effort.
Sometimes the previously determined treading force is stronger than the strongest set treading force
If it is 2nd / weak, output the 3rd strength setting output
Output the output signal to be output from the electric motor, and
Constant pedaling force is weaker than medium pedaling force and stronger than weaker pedaling force
The treading force determined last time is stronger than the middle set treading force.
If it is 4th / if weak, 5th strength setting output
Microphone that outputs the output signal to be output from the electric motor
The control unit is equipped with a computer, and the control unit processes the signals from the rotation detection mechanism and the tension detection mechanism as digital signals. In addition to the improvement, it is possible to easily carry or move the bicycle other than during traveling.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a mobile device drive apparatus of the present invention, and is a side view showing the vicinity of a detection drive unit.

FIG. 2 is a diagram showing an embodiment of a mobile device driving apparatus of the present invention, and is a plan view showing the detection driving unit of FIG.

FIG. 3 is a diagram showing an embodiment of a mobile device driving apparatus of the present invention, in which an outer cylinder and an inner cylinder, a reflection type photo sensor which is provided in the outer cylinder and constitutes a relative position detecting means, and a reflection piece FIG.

FIG. 4 is a diagram showing an embodiment of a mobile device driving device of the present invention, and is an overall plan view showing a control system of the mobile device driving device.

FIG. 5 is a diagram showing an embodiment of a mobile device driving apparatus of the present invention and is a flowchart executed in a control unit.

FIG. 6 is an overall side view showing a conventional driving force assisting mechanism.

[Description of Signs] 4 Pedal 10 Moving device drive device 12 Chain 12a Drive gear 13 Rotation detection mechanism 14 Tension detection mechanism 15 Motor (electric motor) 16 Wheel 19 Drive mechanism 20 Control unit 58 Microcomputer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masaaki Kobayashi 1-7-9 Kojima, Taito-ku, Tokyo Inside Armue Electronics Co., Ltd. (72) Inventor Takeshi Teragaki 1-2-23-20-402 Yaguchi, Ota-ku, Tokyo ( 56) References Japanese Patent Laid-Open No. 4-244496 (JP, A)

Claims (1)

(57) [Claims] 1. A pedaling force acting on a pedal (4) is used as a drive source.
While attached to mobile equipment such as a bicycle
Mobile device drive device (1) that drives the wheels of the mobile device.
0), a rotation detection mechanism (13) for detecting the rotation of the chain (12) mounted endlessly between the drive gear (12a) and the driven gear, and a tension for detecting the tension acting on the chain. Signals from the detection mechanism (14), a drive mechanism (19) that transmits the power generated by the prime mover (15) to the wheels (16) of the mobile device as a rotary drive force, and signals from the rotation detection mechanism and the tension detection mechanism. control Yoo for controlling the drive mechanism based on the
And a knit (20), and a determination pedal force and a front force determined from a signal from the tension detection mechanism.
Strong, medium and weak preset pedal force set in advance in the control unit
When the judgment pedal force is stronger than the strongest set pedal force
Is the strongest setting among 5 levels with different strengths
Is it an electric motor that uses output power as the prime mover?
Output the output signal from the
If the pedaling force is weaker than the constant pedaling force and stronger than the medium pedaling force, the previous judgment
Second if the determined pedal effort is greater than the strongest pedal effort
/ If weak, set output of the third strength to the electric motor
Output the output signal to be output from the
If the pedal force is weaker than the set pedal force and weaker than the set pedal force, the previous time
4th if the determined pedal effort is stronger than the middle set pedal effort
/ If weak, set the output of the fifth strength to the electric motor
Microcomputer that outputs an output signal to be output from
A mobile device driving device (10) , characterized in that a control unit (58) is provided in the control unit .