JP2000062664A - Saddle raising and lowering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a saddle raising and lowering device by which the suitable saddle adjustment is automatically performed according to the traveling state and safe and efficient traveling can be performed at all times. SOLUTION: This saddle raising and lowering device is constituted of saddle raising and lowering means 22, 25, 27 and 28 for increasing and decreasing the height of a saddle, operating means 14, 15, 17, 28A and 29 for moving the saddle raising and lowering means, control parts 9 to 14 for controlling the operating means, sped detecting means 5, 6 for detecting the traveling speed, and saddle position detecting means 16, 19. The operating means are controlled according to the traveling speed detected by the speed detecting means, and the height of the saddle is automatically adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle saddle lifting device in which the height of a seat post, that is, a saddle, with respect to a seat pipe can be adjusted.

[0002]

2. Description of the Related Art Usually, as shown in FIG. 7 (Japanese Utility Model Publication No. 6-50302), a seat post 52 with a saddle attached is inserted into a seat pipe 51 which is a bicycle frame, and the insertion amount is adjusted appropriately. For example, fasteners 55, 5
Both of them are integrally fixed by means of tightening bolts / nuts 53, 54 through 6. That is, the height of the saddle with respect to the seat pipe 51 is appropriately adjusted according to the physique of the passenger. The height of the saddle is adjusted so that the rider can keep his / her foot on the ground while standing on the saddle and can support the bicycle stably when the bicycle is stopped. The height of the saddle to be rotated is larger than the height at the time of stopping, so normally, the saddle height during running is prioritized for efficient running, and when stopping, the toe is barely grounded by standing on the toes and in an unstable state. There is a risk that safety will not be ensured.

From the above, the saddle height during traveling can be satisfied at the same time as the saddle height at the time of stopping, which can ensure a stable standing of the bicycle, and the saddle height during traveling, which enables efficient pedal rotation. It has been proposed that the height of the can be adjusted arbitrarily. As a typical example of those conventional examples, Japanese Patent Laid-Open No. 8-2458 shown in FIG.
Disclosed in Japanese Patent Publication No. 7-17 shown in FIG.
There is one disclosed in Japanese Patent No. 2364.

In the second conventional example shown in FIG. 8, a saddle base cylinder 63 inserted into a frame 64 and biased upward by a spring is slidably attached via a sheath pipe 65, and travels. When you want to change the height of the saddle 62 inside,
The occupant lifts the buttocks from the saddle 62, operates the lever 60 attached to the handle to pull the movable rope 71, and pulls out the adjustment pins 68 from the adjustment holes 63A formed in the saddle base cylinder 63, thereby sliding. Flexible saddle base 63
After moving the buttocks placed on the saddle 62 up and down to adjust the position, the lever 60 is released and the adjustment pin 6
An appropriate saddle height can be selected by locking 8 in the adjustment hole 63A corresponding to the adjusted position.

In the third conventional example shown in FIG. 9, a hydraulic drive device 82 is attached to a seat tube 84 which is a frame, and a saddle 81 is attached to a drive portion 86 which can be raised and lowered by the hydraulic drive device 82. In order to change the height of the saddle 81 while traveling, the passenger operates the hydraulic pressure switching valve 83 with the hydraulic pressure generated by the hydraulic pressure generating device 87, and the pressure from the hydraulic pipe 85 causes the hydraulic drive device 82 to operate. The drive portion 86 is moved up and down to adjust the height of the saddle 81 to an arbitrary position.

[0006]

However, the advent of such a saddle lifting device has made it possible for a comfortable traveling by efficient pedal rotation by the adjustment of the saddle height by the occupants during traveling. Since the adjustment of the saddle height in the middle is controlled only by the operation of the passenger, precise operation is not performed at the time of sudden stop to avoid sudden danger, and its function is fully utilized. There was still the risk of the bicycle falling over without being told. Moreover, since a troublesome operation is required every time the vehicle is started or stopped, it may become an unnecessary long item for passengers who do not like the troublesome operation, and the function may not be fully utilized.

Therefore, the present invention solves the problems of the conventional saddle lifting device, and automatically adjusts the saddle height appropriately in accordance with the running state, so that the saddle can always run safely and efficiently. An object is to provide a lifting device.

[0008]

Therefore, according to the present invention, a saddle raising / lowering means for raising / lowering the height of a saddle, an operating means for moving the saddle raising / lowering means, a control section for controlling the operating means, and a traveling speed. And a saddle position detecting means for controlling the operating means in accordance with the traveling speed detected by the speed detecting means, so that the height of the saddle can be automatically adjusted. It is characterized by having done. Further, according to the present invention, the lower part of the seat post biased upward by a compression coil spring constitutes an on-off valve for opening and closing an oil passage of a movable partition wall that divides an oil chamber provided in the seat pipe into two parts. When a predetermined speed is detected by the speed detecting means, the opening / closing valve is opened, the sliding of the movable partition wall in the oil chamber is allowed, the seat post moves upward, and the seat position is detected by the saddle position detecting means. It is characterized in that the opening / closing valve closes the oil passage port of the movable partition wall upon detecting that the post has reached a predetermined position, and stops the movement of the seat post. Further, the present invention is characterized in that the upper limit position of the saddle position detecting means is adjustable. Further, the present invention is
Before the speed detected by the speed detecting means is confirmed,
The operation means is controlled so that the height of the saddle can be automatically adjusted. These are means for solving the problems.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show an embodiment of a saddle lifting device according to the present invention. FIG. 1 is a side view of the vicinity of a saddle of a bicycle to which the saddle lifting device according to the present invention is attached, and FIG. 2B is an enlarged view of the vicinity of the on-off valve, FIG. 3 is an internal view of the saddle lifting device in a high position movable state, and FIG. 4 is a block of the saddle lifting device of the present invention. 5 and 6 are control flow diagrams of the saddle lifting device according to the present invention.

As shown in FIG. 1, a seat post having a saddle fixed to the upper end is movably inserted into a seat pipe 30 which constitutes a bicycle frame. The main body 1 of the saddle lifting device is arranged under the saddle near the upper end of the seat post, and the position detecting case 2 is arranged on the seat pipe 30 side, and a seat post (saddle) is arranged between them. The flexible connecting cord 3 for transmitting the position signal and the speed detection signal is connected. The magnet 5 is fixed to an appropriate rotating portion such as a spoke of the rear wheel, and the reed switch 6 is fixed to an appropriate portion of the rear fork near the rotation locus of the magnet 5. When the bicycle starts running, a pulse is generated each time the magnet 5 approaches the reed switch 6, and the running speed or acceleration of the bicycle is detected by calculating the number of pulses per unit time or the rate of change. The speed detection signal of the bicycle is sent to the main body 1 of the saddle lifting device through the reed switch cord 4 attached along the rear fork.

FIG. 2A is an internal view of the saddle lifting device of the present invention in a fixed low position. A saddle (not shown in FIG. 2) is fixed to an upper end of a seat pipe 30 which constitutes a bicycle frame. The seat post 22 is movably inserted, and the seat post 22 is compressed by the compression coil spring 25.
It is configured to be biased upward by. At this time, the seat post 22 constitutes a seat post piston that is slidably inserted into a seat post cylinder 23 mounted in the seat pipe 30. A lower portion of the seat post 22, which is a seat post piston, is provided in the seat post cylinder 23 mounted in the seat pipe 30, and penetrates a movable partition 28 that divides the first oil chamber 27A and the second oil chamber 27B into two. Then, an opening / closing valve 29 for opening / closing the oil passage 28A is configured. The valve portion 29A is configured to abut on the upper end of the on-off valve 29 at a position where the oil passage 28A of the movable partition 28 can be closed from below. The urging of the valve portion 29A of the on-off valve 29 toward the oil passage 28A of the movable partition wall 28 by the compression coil spring 25 urges the valve portion 29A to close. Reference numeral 26 indicates a seal for preventing oil from leaking from the oil chamber.

Movable partition wall 2 by the valve portion 29A of the on-off valve 29
By closing the oil passage 28A of No. 8, the first and second
The oil flow between the oil chambers 27A and 27B is stopped,
The movable partition 28, that is, the upward and downward movement of the seat post 22 is blocked, and the position of the saddle is fixed to the low position. In addition, the movable partition wall 2 of the valve portion 29A
By opening and releasing the valve 8 from the oil passage port 28A, the oil is allowed to flow between the first and second oil chambers 27A and 27B, so that the movable partition 28, that is, the seat post 22 becomes movable.

A position detecting portion case 2 is arranged at an upper end portion of a seat post cylinder 23 mounted in the seat pipe 30, and a lower limit detecting hole formed in the seat post 22 is provided therein. A micro switch 16 that engages with 21 to detect this and a micro switch 19 that engages with the upper limit detection hole 24 and detects this are installed. Reference numeral 20 is an upper limit adjusting slider for adjusting the installation position of the micro switch 19 in order to adjust the upper limit position of the saddle position.

A body case 1 of the saddle lifting device is disposed immediately below the saddle near the upper end of the seat post 22, and has a battery 8 as a power source, a power switch 7 that can be operated from outside the case 1, and a control unit. Circuit board 10, motor 9, worm gear 11 and reduction gear 1 forming a reduction gear
2. The geared cam 14 and the micro switch 13 for detecting the rotational position of the geared cam 14 are housed, and the operation lever 15 is swung by the rotation of the geared cam 14 to resist the restoring force of the compression coil spring 18. Then, the interlocking rod 17 slidably inserted into the axial center position of the seat post 22 is moved downward to move the valve portion 2 of the opening / closing valve 29.
The movable partition 28 of 9A is configured to open and open from the oil passage 28A.

The first and second oil chambers 27A, 27
B, a compression coil spring 25 for urging the movable partition 28 and the seat post 22 arranged in these oil chambers upward
Composes a saddle lifting mechanism that raises and lowers the saddle height,
In order to make the movable partition wall 28 movable in the oil chamber, the operation lever 15 is swung along with the rotation of the geared cam 14 in order to release the blockage of the oil passage 28A by the opening / closing valve 29, and the compression coil spring 18 is moved. These members for moving the interlocking rod 17 downward against the restoring force of the above constitute the operating means for moving the saddle elevating means, and by the speed detecting means constituted by the magnet 5 and the reed switch 6. A motor 9, a speed reducer 11, 1 for controlling the operating means according to the detected traveling speed.
The control circuit board 10 on which 2, 13, 14 and a microcomputer are installed constitutes a control unit, and the microswitch 1
6, 19 and the like constitute saddle position detecting means.

FIG. 4 is a block diagram of a saddle lifting device according to the present invention, in which a power switch 7 operable from the outside of the main body case 1 in FIG. 2 is turned on so that a current flows from a battery 8 as a power source to a circuit board 10. , A control circuit 3 constituting a control unit
2. The motor drive circuit 33 and the like are in the operation standby state. When the traveling of the bicycle is started and the speed signal which has reached a predetermined traveling speed by the speed detecting means 38 and each signal from the saddle position detecting means 31 and the opening / closing valve detecting means 34 are inputted to the control circuit 32, the control is performed. The circuit 32 detects the saddle position and the valve state of the opening / closing valve in order to adjust the saddle height to an appropriate value according to the traveling speed, and sends a rotation signal of the motor 9 to the motor drive circuit 33 to rotate the motor 9. Let The opening / closing valve 36 is operated by operating the opening / closing valve opening / closing means 36 via the speed reduction mechanism 35 to raise / lower the saddle raising / lowering means 37. The state of the opening / closing valve opening / closing means 36 is returned to the control circuit 32 by the opening / closing valve detecting means 34.

When the bicycle reaches a predetermined speed, as shown in FIG. 3, the motor 9 is driven and the geared cam 14 is rotated via the reduction gear 12 to swing the operating lever 15 and the compression coil spring. The interlocking rod 17 arranged in the seat post 22 is moved downward against the restoring force of the valve 18 to open the valve portion 29A of the opening / closing valve from the oil passage 28A of the partition 28 to open the valve. As a result, the first and second oil chambers 27A and 27B are communicated with each other through the oil passage 28A, so that the restoring force of the compression coil spring 25 allows the seat post 22, that is, the saddle and the partition 28 to move upward, and the partition wall The oil flows through the oil passage 28 </ b> A of 28 so that the oil moves upward gently. FIG. 3 shows the saddle in a high position movable state, in which the micro switch 19 is engaged with the upper limit detection hole 24 of the seat post 22 and the upper limit position of the seat post 22 is detected.
As a result, the upper limit position detection signal is sent to the control circuit, the motor 9 is reversely driven, the geared cam 14 is reversely rotated, the operation lever 15 is released, and the interlocking rod 17 is moved upward, thereby opening and closing the valve of the on-off valve. Oil passage 28A of partition 28 at portion 29A
Is closed to close the valve, the movement of the partition wall 28 is blocked, and the height of the seat post 22, that is, the saddle is fixed.

The operation of the saddle lifting device of the present invention constructed as above will be described with reference to the control flows of FIGS. 5 and 6. Where T1 is the speed pulse interval (variable), T2 is the previous speed pulse interval (variable), T
b (power saving standby start time)> Ta (second predetermined time: stop, low speed)> Tc (first predetermined time) represents a pulse interval (constant), and the smallest pulse interval Tc is the lifting and lowering of the saddle. It is a traveling speed set value of the bicycle when the on-off valve 29 is switched for. Further, when the flag P = 1, the open / close valve 2
9 shows the valve closed state, and flag P = 0 shows the valve open state of the on-off valve. As shown in FIG. 5, when the bicycle starts running, the wheels are rotated in step S1 and the generation of the speed pulse is detected by the speed detecting means constituted by the magnet 5 and the reed switch 6, and the control is executed in step S2. The microcomputer in the circuit starts and starts counting the time between pulses. Ta is input to the pulse interval T1, the timer is reset in a state where the opening / closing valve 29 with the flag P = 1 is closed, and the process proceeds to step S3.

In step S3, it is determined whether or not a speed pulse is input. If no speed pulse is input, step S4 is skipped and the process proceeds to step S5. In step S5, the value of the timer is compared with the transition time Tb to the power saving standby mode. If it is determined that the value of the timer is Tb or more, the microcomputer is stopped in step S11 and the power saving standby state is set. If the value of the timer is smaller than Tb, the process proceeds to step S6. If the value of the timer is equal to or greater than the second predetermined time (stop, low speed) Ta, it is determined to be stopped or low, and the process proceeds to step S10 to set the saddle to the low state. If there is any, it moves to the next step. When it is determined in step S6 that the timer value is smaller than the second predetermined time Ta, the process proceeds to step S7. Since step S4 is skipped after step S7, processing is performed using the pulse intervals T1 and T2 processed in the previous time.

When the input of the speed pulse is determined in step S3, the process proceeds to step S4. Step S
In 4, the pulse interval T1 is substituted for the previous pulse interval T2, the timer value is substituted for the pulse interval T1, the timer is reset, and the process proceeds to step S5. In step S5, the value of the timer is compared with the power saving standby time Tb,
Since the value of the timer has just been reset, it is shorter than the power saving standby time Tb, and the process proceeds to step S6. Also in step S6, the second predetermined time Ta is compared, but similarly, since it is just after the reset, it is smaller than the second predetermined time Ta and the process proceeds to step S7. If T1 is greater than the first predetermined time Tc in step S7 (running at a speed equal to or lower than the predetermined speed), the process proceeds to step S10, and the process proceeds to the next step depending on whether the saddle is in the low state. Further, in step S7, the pulse interval T1 is the first predetermined time T
If it is smaller than c (running at a predetermined speed or more), the process proceeds to step S8. In step S8, pulse interval T1
If it is determined that the difference between the pulse interval T2 and the previous pulse interval T2 is Td or more (rapid deceleration of a predetermined value or more), the process proceeds to step S10, and the process proceeds to the next step depending on whether the saddle position is low. . If the difference between the pulse interval T1 and the previous pulse interval T2 is smaller than Td in step S8 (gradual speed change with small acceleration or deceleration), step S9.
Move to. In step S9, the process proceeds to the next step depending on whether the saddle position is high. The predetermined value Td for judging the sudden deceleration equal to or more than the predetermined value is provided.
This is to prevent the saddle from inadvertently moving up and down as the traveling speed increases and decreases.

As shown in FIG. 6, step S9 of FIG.
And the microswitch 16 in step S10,
When it is necessary to determine the current saddle position by 19 and control the raising or lowering of the saddle lifting device different from the determined saddle position, OPEN (NO for each)
If is determined, the process proceeds to step S12. If the flag P = 1 is not set in step S12, that is, the opening / closing valve 29 is open, the routine returns to MAIN. If P = 1, that is, the opening / closing valve 29 is closed, the motor 9 is driven to rotate normally in step S13 to open / close the valve 29. And the seat post 22, that is, the saddle, becomes movable and is moved upward by the restoring force of the compression coil spring 25. Step S14
The opening of the opening / closing valve 29 is detected by the step S15.
In step S3, the motor 9 is stopped, the open / close valve 29 is held in the open position, and the flag P = 0 is set.
Returning to N, the control is repeated.

Steps S9 and S10 of FIG.
When the current saddle position by the microswitches 16 and 19 is discriminated, and if the determined saddle position is the same as CLOSE (YES), the process proceeds to step S16. If the flag P = 0 is not set in step S16, that is, if the opening / closing valve 29 is closed, the process returns to MAIN before step S3, and P = 0.
That is, if the opening / closing valve 29 is open, the motor 9 is driven in the reverse rotation to close the opening / closing valve 29 in step S17. The closing of the opening / closing valve 29 is detected in step S18, the motor 9 is stopped in step S19, the closing position of the opening / closing valve 29 is held, the flag P = 1 is set, the flow returns to MAIN before step S3, and the control is repeated. Be done.

As described above, in the saddle movable state, if the passenger is sitting on the saddle when the saddle position is in the high position, the saddle is lowered to the low position by the weight of the passenger and the micro switch 16 The position of the actuator and the position of the lower limit detection hole 21 of the seat post 22 are aligned, and the micro switch 16 is turned off to detect the low position of the saddle position. When the passenger lifts his / her waist from the saddle when the saddle position is in the low position, the compression coil spring 25 raises the saddle to the high position, and the position of the actuator of the micro switch 19 and the position of the upper limit detection hole 24 of the seat post 22 are changed. After matching, the micro switch 19 is turned off and the high position of the saddle position is detected.

With the above operation pattern, the saddle can be moved immediately after starting, and the passenger can lift the hips from the saddle to raise the saddle position to the high position. Is also held in the high position, the saddle can be moved immediately before stopping, and the passenger's own weight can lower the saddle position to the low position, and the saddle is held in the low position even after getting off after stopping. Become.

Although the embodiments of the present invention have been described above, the saddle elevating means, the operating means for moving the saddle elevating means, the speed detecting means, and the like within the scope of the present invention.
The control unit and the saddle position detecting unit for controlling the operating unit according to the traveling speed can be appropriately configured. For example, a potentiometer may be used as the saddle position detecting means instead of the micro switch, and the upper limit position of the saddle is set by moving the micro switch, but a mechanical stopper, switch or volume is used. It may be an electrical setting.

[0026]

As described in detail above, according to the present invention, as a saddle raising / lowering device, a saddle raising / lowering means for raising / lowering the height of the saddle, an operating means for moving the saddle raising / lowering means, and the operating means are provided. A control unit for controlling, a speed detecting unit for detecting a traveling speed, and a saddle position detecting unit, and controls the operating unit in accordance with the traveling speed detected by the speed detecting unit to adjust the height of the saddle. Since it is configured so that it can be automatically adjusted, the saddle height at the time of stopping that can secure a stable standing of the bicycle and the saddle height at the time of traveling that enables comfortable running by efficient pedal rotation are satisfied at the same time. , The conventional saddle height adjustment control, which depends on the passenger's own operation, does not perform an appropriate operation at the time of sudden stop for sudden danger avoidance, or its function Is full Bicycle without being utilized is also eliminated danger, such as to fall in.

The lower part of the seat post, which is biased upward by a compression coil spring, constitutes an opening / closing valve for opening / closing an oil passage of a movable partition wall that divides an oil chamber provided in the seat pipe into two parts. When a predetermined speed is detected by the speed detecting means, the opening / closing valve is opened, the sliding of the movable partition wall in the oil chamber is allowed, the seat post moves upward, and the seat position is detected by the saddle position detecting means. Since the opening / closing valve closes the oil passage of the movable partition to stop the movement of the seat post by detecting that the post has reached a predetermined position, it is always operated with a large force by the compression coil spring. The start of the ascending control of the seat post biased upward and the start of the descending control of the seat post due to the relatively large occupant's own weight, and the holding of the seat post at the predetermined position It made possible by the small force by the opening and closing control of the oil flow openings of the dynamic partition wall. Therefore, a motor or the like as an operating means for moving the saddle elevating means can be constructed with a very small capacity, power can be saved, and the cost is low.
Further, when the seat post, that is, the saddle is moved up and down, a sudden movement is prevented by the damper action of the orifice of the oil passing through the oil passage of the movable partition that moves together with the seat post, and an appropriate low speed is achieved. As the seat post moves up and down, you can get a comfortable seating feeling.

Further, since the saddle position can be controlled before the speed detected by the speed detecting means is determined, the saddle can be quickly lowered even in the case of sudden braking. Further, by configuring the upper limit position of the saddle position detecting means to be adjustable, by adjusting and setting the upper limit position of the saddle height that automatically rises during traveling before starting traveling, the efficiency can be improved. It is possible to appropriately adjust the saddle height for enabling comfortable running by rotating the pedal in accordance with the difference in the physique of the passenger. As described above, according to the present invention, the problem of the conventional saddle lifting device is solved, and the saddle height is automatically adjusted according to the traveling state, so that the saddle can always travel safely and efficiently. A lifting device is provided.

[Brief description of drawings]

1 shows an embodiment of a saddle lifting device of the present invention and is a side view of the vicinity of a saddle of a bicycle to which the saddle lifting device of the present invention is attached.

2 shows an embodiment of a saddle lifting device of the present invention, FIG. 2 (A) is an internal view of the saddle lifting device in a fixed low position, and FIG. 2 (B) is an enlarged view of the vicinity of the on-off valve. Is.

FIG. 3 shows an embodiment of a saddle lifting device of the present invention, and is an internal view of the saddle lifting device in a high position movable state.

FIG. 4 is a block diagram of a saddle lifting device according to an embodiment of a saddle lifting device of the present invention.

FIG. 5 shows an embodiment of a saddle lifting device of the present invention, and is a control flow first half diagram of the saddle lifting device.

FIG. 6 shows an embodiment of a saddle lifting device according to the present invention, and is a second half diagram of a control flow of the saddle lifting device.

FIG. 7 is a perspective view of essential parts showing a first conventional example of a saddle lifting device.

FIG. 8 is an overall side view showing a second conventional example of a saddle lifting device.

FIG. 9 is an overall side view showing a third conventional example of a saddle lifting device.

[Explanation of symbols]

1 body case 2 Position detector case 3 connection cord 4 reed switch code 5 magnets 6 reed switch 7 power switch 8 batteries 9 motors 10 circuit board 11 Worm gear 12 reduction gears 13 micro switch 14 Cam with gear 15 Open / close valve operating lever 16 micro switch 17 interlocking rod 18 Compression coil spring 19 micro switch 20 Upper limit adjustment slider 21 Lower limit detection hole 22 Seat post (piston) 23 Seatpost cylinder 24 Upper limit detection hole 25 Compression coil spring 26 seal 27A 1st oil chamber 27B Second oil chamber 28 Movable bulkhead 28A oil port 29 on-off valve 29A valve 30 seat pipe

Claims (4)

[Claims] 1. A saddle elevating means for raising and lowering the height of a saddle, an operating means for moving the saddle elevating means, a control section for controlling the operating means, a speed detecting means for detecting a traveling speed, and a saddle position. A saddle raising / lowering device comprising a detecting means, wherein the operating means is controlled according to the traveling speed detected by the speed detecting means so that the height of the saddle can be automatically adjusted. 2. An on-off valve that opens and closes an oil passage of a movable partition wall that divides an oil chamber provided in a seat pipe into two parts is formed by a lower portion of a seat post that is biased upward by a compression coil spring. When the predetermined speed is detected by the speed detecting means,
The opening / closing valve is opened to allow sliding of the movable partition in the oil chamber, the seat post moves upward, and the saddle position detecting means detects that the seat post has reached a predetermined position. The saddle lifting device according to claim 1, wherein the opening / closing valve is configured to close the oil passage of the movable partition wall and stop the movement of the seat post. 3. The saddle lifting device according to claim 1, wherein an upper limit position of the saddle position detecting means is adjustable. 4. The saddle height can be automatically adjusted by controlling the operating means before the speed detected by the speed detecting means is settled.
The saddle lifting device according to any one of 1 to 3.