JP3537649B2 - Electric pruning scissors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric pruning scissors used for pruning, pruning, landscaping and the like of garden trees.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Application Laid-Open No. 63-281680
According to the pruning scissors disclosed in the publication, the movable blade can be stopped at an arbitrary intermediate position by adjusting the amount of pulling operation of the trigger by the finger, for example, in a narrow place where branches and leaves are densely packed. When performing pruning work,
The cutting operation could be started with the movable blade stopped intermediately.

[0003]

However, according to the conventional pruning scissors, the opening and closing operation of the movable blade is obtained by moving the nut in the axial direction by rotating the screw shaft. A trigger for controlling the operation of the blade is rotatably supported. Therefore, when the trigger is rotated to open and close the movable blade,
The center of rotation of the trigger moves, which causes a problem that the operability of the trigger (feel of a pull operation with a finger) is not good. The present invention has been made in view of this problem, and the movable blade can be stopped at an arbitrary intermediate position,
The present invention is characterized by providing electric pruning scissors excellent in operability of a trigger.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention provides
An electric pruning hammer having the configuration described in the claims.
I just thought. According to the pruning scissors, when the trigger is operated to rotate, the first rotating body rotates relatively to the second rotating body, whereby the rotation deviation angle generated therebetween deviates from a reference value, and from this reference value, The movable blade rotates in the direction to eliminate the displacement. Therefore, the movable blade can be stopped at an arbitrary position according to the amount of rotation of the trigger. Further, the movable blade rotates through meshing of the gears, and is not configured to utilize the axial movement of the nut meshing with the screw shaft as in the related art. Therefore, the center of rotation of the trigger does not move, so that good operability of the trigger can be ensured.

[0005] A configuration different from the first aspect of the present invention.
(Hereinafter referred to as related technology)
The effect can be obtained. This related art is an electric pruning scissor in which a movable blade rotates through meshing of gears when a trigger is rotated, a first sensor for detecting a rotation angle of the trigger, and a rotation sensor for detecting a rotation angle of the movable blade. The movable blade is controlled to displace the second sensor to a position corresponding in advance to a position of the first sensor displaced by a rotation operation of the trigger. It is characterized. Related to this related technology
According to the pruning scissors, the rotation angle of the trigger is detected by the first sensor, and the rotation angle of the movable blade is detected by the second sensor. The detection value of the first sensor and the detection value of the second sensor are associated in advance, and when the detection value of the first sensor changes by the rotation operation of the trigger, the movable blade is rotated to change the second sensor to a position corresponding to the change. I do. As described above, the movable blade rotates through the meshing of the gears, and does not use the axial movement of the nut meshing with the screw shaft as in the related art. From this, it is sufficient that the center of rotation of the trigger is fixed, thereby improving the operability of the trigger.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention according to claim 1 will be described.
An embodiment will be described with reference to FIGS. 1 to 4 show the internal structure of the electric pruning scissors 1 of the present embodiment. In the figure, reference numerals 2 and 3 denote a half-split case that constitutes a housing having a split structure.
Between the three, the mechanism of the pruning scissors 1 is incorporated.
An electric motor 4 as a drive source is incorporated between the grip portions 2a, 3a of the half cases 2, 3. The rotational power of the electric motor 4 is transmitted to the output shaft 5 via two planetary gear trains 12 and 13. A small bevel gear 6 is attached to the output shaft 5, and this small bevel gear 6 meshes with a larger bevel gear 7 having a larger diameter. This large bevel gear 7 has an intermediate shaft 8
The intermediate shaft 8 is rotatably supported by a gear casing 11 via bearings 9 and 10. The gear casing 11 is fixed between the half cases 2 and 3.

[0007] An output gear 14 is attached to the tip of the intermediate shaft 8, and the output gear 14 meshes with the sector gear 17a. On the other hand, a movable blade 17 and a fixed blade 18 are attached to a front end of the gear casing 11 via a support shaft 16. However, the fixed blade 18 includes the support shaft 16 and the bolt 1
9 and 19, it is fixed to the gear casing 11 and does not rotate. On the other hand, the movable blade 17 is rotatably supported via a support shaft 16 and opens and closes with respect to the fixed blade 18 by rotating. At the rear end of the movable blade 17, a sector gear 17a is formed.
Is engaged with the output gear 14. Since such a power transmission path is incorporated between the electric motor 4 and the movable blade 17, when the electric motor 4 is started, the output gear 14 rotates at a predetermined reduction ratio, whereby the movable blade 17 is rotated.
Opens and closes about the support shaft 16. When the movable blade 17 is closed, an object to be cut (tree branch or the like) is sandwiched between the movable blade 17 and the fixed blade 18 and cut.

Next, a trigger 20 is provided between the two cases 2 and 3.
Are rotatably supported via a support shaft 20a. The trigger 20 is urged to the off side (upward in FIG. 2) by a torsion spring 21 (see FIG. 2). This trigger 2
A connecting arm 20c extends from an end on the rotation base end side of 0 (inside of the cases 2 and 3).
An engagement pin 20b protrudes from the tip of the shaft in parallel with the support shaft 20a. The engagement pin 20b is connected to a deviation angle detection sensor described below. In the case of the present embodiment, a variable resistor called a volume (hereinafter, simply referred to as a “volume 30”) is used for the deviation angle detection sensor. The volume 30 has a cylindrical case 31 and a shaft portion 32 that protrudes rotatably from one side of the case 31. This volume 30
As shown in FIG. 4, the screw portion 31 a of the case 31 is rotatably mounted on the mounting base 11 a by being supported by a mounting base 11 a provided integrally with the gear casing 11. That is, a sleeve 33 with a flange is screwed into the screw portion 31a, and the case 31 of the volume 30 is rotatably supported by inserting the sleeve 33 into the support hole 11b of the mounting base 11a. ing. Moreover, the volume 30 is supported by the flange 33a of the sleeve 33 so as not to move in the axial direction (vertical direction in the drawing). A connecting arm 34 having a bifurcated tip is sandwiched between the lower surface of the mounting base 11a in the figure. This link arm 3
4 is pressed and fixed to the side surface of the case 31 by the end of the sleeve 33 screwed into the screw portion 31a, and thus rotates integrally with the case 31. The engagement pin 20b of the trigger 20 is connected to a forked portion 34a formed at the end of the connection arm 34. Therefore, when the trigger 20 is rotated, the case 31 of the volume 30 is rotated through the connection between the engagement pin 20b and the connection arm 34. When the rotation operation of the trigger 20 is released, the trigger 2 is released.
Since 0 rotates in the returning direction by the torsion spring 21, the case 31 of the volume 30 also rotates in the same direction.

On the other hand, a connecting arm 35 having a bifurcated tip is also attached to the shaft portion 32 of the volume 30. The shaft portion 32 has a chamfered portion 32a formed therein.
Rotates together. The connecting arm 35 extends to the side of the shaft portion 32, and has a movable blade 1
7 is engaged. Therefore, when the movable blade 17 rotates, the shaft portion 32 of the volume 30 rotates through the connection between the engagement pin 17b and the connection arm 35. Thus, volume 30 itself as the deviation angle detecting sensor provided rotatably, thereby casing 31 and the shaft portion 32 is rotatable independently. Therefore, the case 31 of the volume 30 corresponds to the first rotating body described in the claims, and the shaft portion 32
Corresponds to the second rotating body. In the figure, reference numeral 30a denotes a reference voltage terminal, 30b denotes an output terminal, and 30c denotes a GND terminal.

According thus constructed myself understood but the constant scissors 1, it is possible to stop the movable blade 17 at an arbitrary position in accordance with the rotation operation amount of the trigger 20. That is, trigger 2
When 0 is rotated, the case 31 of the volume 30 rotates as described above. Then, a deviation in the rotation direction occurs between the case 31 and the shaft portion 32. When this rotational deviation occurs, the electric motor 4 rotates enough to return the rotational deviation to 0 by the control circuit 50 described below (servo control of the electric motor 4). The movable blade 17 can be stopped at an arbitrary position. The details of the control circuit 50 are shown in FIG. The control circuit 50 is mainly composed of a so-called PWM (pulse width modulation) switching circuit including four switches 52 to 55. When the switches 52 and 53 are turned on, the electric motor 4 rotates forward,
When the switches 54 and 55 are turned on, the electric motor 4 rotates in the reverse direction. The PWM switching circuit and the servo control itself of the electric motor 4 using the PWM switching circuit are conventionally known, and need not be particularly changed in the present embodiment.

In the figure, reference numeral 51 denotes a CPU, to which a current value I obtained by converting a voltage value V output from the output terminal 30b of the volume 30 by a voltage / current converter 56 is input. In the present embodiment, a change in voltage is converted into a change in current in consideration of the influence of external noise or the like, but it may be converted into a signal of another dimension (for example, frequency). The CPU 51 compares the input current value I with a reference current value I0 stored in the CPU 51 in advance to determine a current deviation ΔI (= I−I0).
) Is obtained, and the switching circuit is turned on / off based on the current deviation ΔI.
Stop, rotation direction and rotation speed, ie movable blade 1
7 is controlled. Electric motor 4
Of the planetary gear trains 12 and 13, the meshing of the small bevel gear 6 and the large bevel gear 7, the output gear 14 and the sector gear 17
It is transmitted to the movable blade 17 through the meshing of a. The control circuit 50 is provided with a main power supply 57. When the main power supply 57 is turned on, the status display lamp 58 is turned on, whereby the scissors 1 enters an operation standby state. In FIG. 10, reference numeral 60 denotes a battery as a power supply. Reference numeral 61 denotes a temperature detection sensor, and the pruning scissors 1
It is attached to a predetermined position inside. When the internal temperature becomes higher than a certain level due to overload or the like, this is detected by the temperature detection sensor 6.
1 and the power supply circuit is forcibly turned off based on the output signal of the temperature detection sensor 61. Reference numerals 62 and 63 in the figure denote current detectors, which detect current values at the time of forward rotation and reverse rotation of the electric motor 4, and this is fed back to the CPU 51.

Next, FIGS. 5 to 9 show the relationship between the amount of rotation of the trigger 20 and the operation of the movable blade 17. FIG. 5 shows a state where the trigger 20 is not operated, that is, FIG.
3 and the same state as FIG. The positional relationship between the case 31 of the volume 30 and the shaft portion 32 in the rotation direction in the non-triggered state is set to the reference position (angle deviation α = 0). Since the case 31 and the shaft portion 32 are relatively located at the reference position, the current deviation ΔI is zero,
Therefore, no ON signal is output from the CPU 51, so that the electric motor 4 is kept stopped.

From this stopped state, as shown in FIG. 6, when the trigger 20 is rotated by an angle in the ON direction (clockwise direction in FIG. 5) and held at that position, the engagement pin 20b and the connecting arm 34 Volume 30 via linkage
The case 31 rotates from the reference position by an angle α in the counterclockwise direction in the figure, whereby the angular deviation α
Is generated. When the angle deviation α occurs, the current value changes due to the change in the resistance value, thereby causing a current deviation ΔI with the reference current I. This current deviation ΔI is
The ON signal is output to the switches 52 and 53 of the PWM switching circuit based on this, and the electric motor 4 rotates forward.

When the electric motor 4 is started in the normal rotation direction, the rotational power is transmitted through the planetary gear trains 12 and 13, the small bevel gear 6 and the large bevel gear 7, and the output gear 14 and the sector gear 17a. The movable blade 17 is closed (see FIGS. 5 to 5).
(Clockwise in FIG. 9). When the movable blade 17 rotates in the closing direction, the engagement pin 17b and the link arm 3
The shaft 32 of the volume 30 rotates in the counterclockwise direction through the connection 5. When the shaft portion 32 rotates counterclockwise by the angle α, the angular deviation α from the case 31 becomes zero.
When the angle deviation α between the case 31 and the shaft portion 32 of the volume 30 becomes zero in this way, the output from the CPU 51 to the switching circuit is turned off, thereby stopping the motor 4,
As a result, the movable blade 17 stops. This state is shown in FIG. This state is a state in which the movable blade 17 is rotated to an intermediate position in the closing direction and stopped by rotating and holding the trigger 20 halfway.

In this manner, the movable blade 17 is closed halfway,
When the trigger 20 is further rotated in the ON direction from the stopped state, the connecting arm 34 and the case 31 further rotate counterclockwise as shown in FIG. Produces a deviation β. Then
In the same manner as described above, the switching circuit is turned on, and the electric motor 4 starts in the normal rotation direction, whereby the movable blade 17 starts to rotate again in the closing direction, and accordingly, the shaft portion 32 also starts to rotate in the counterclockwise direction in the drawing. . When the movable blade 17 is rotated to the completely closed position as shown in FIG. 9, the shaft 32 rotates by the angle β, whereby the angular deviation of the case 31 is returned to zero (current deviation ΔI = reference deviation ΔI0). . When the angle deviation becomes zero, the CPU 51 does not output an ON signal, so that the switching circuit is turned off and the electric motor 4 stops. When the rotating operation of the trigger 20 is released in a state where the movable blade 17 is rotated to the closed position (cutting completed state), the trigger 20 is turned off by the torsion spring 21 (FIGS.
In FIG. 9, the movable blade 17 rotates in the opening direction in order to keep the rotational deviation between the case 31 and the shaft 32 at zero. The rotation of the movable blade 17 in the opening direction is performed when the CPU 51 outputs an ON signal to the switches 54 and 55 and the electric motor 4 rotates in the reverse direction. In the opening stage of the movable blade 17, if the trigger 20 is stopped at an intermediate position, the movable blade 17 can be stopped at the intermediate position in the same manner.

As described above, since the movable blade 17 rotates so as to return the rotation angle deviation between the case 31 and the shaft portion 32 of the volume 30 generated according to the rotation operation amount of the trigger 20 to zero, the trigger 20 By properly operating, the movable blade 17 can be stopped at an arbitrary intermediate position, and can be further rotated in the closing direction from the arbitrary intermediate position, thereby smoothly performing pruning work in a narrow place. be able to. Moreover, in the case of the pruning scissors 1 of the present embodiment, the trigger 20 rotates around the support shaft 20a and the support shaft 20a does not move, so that the operational feeling is not impaired as in the related art. .

Next, the embodiment according to the present invention described above will be described.
The related technology different from the state will be described. This related technology
Pruning scissors 100 is shown in FIGS. 11 19 in accordance with. In the embodiment according to the present invention exemplified above, the movable blade 17 is rotated based on the rotation angle deviation between the case 31 and the shaft portion 32 of the volume 30, that is, the trigger 20 is turned on by one deviation angle detection sensor 30. Although the rotation operation amount and the rotation angle of the movable blade 17 are configured to be detected, the pruning scissors 100 according to the related art are
And the rotation angle of the movable blade 17 are detected by separate sensors . The invention according to the present invention
The same components as those of the embodiment are denoted by the same reference numerals, and description thereof is omitted. In this related art , two linear slide type variable resistors are used as sensors (hereinafter, referred to as a first sensor 101 and a second sensor 102). The same sensor is used for both sensors 101 and 102,
Engagement pins 101a and 102a that move linearly respectively
It has.

The engagement pin 101a of the first sensor 101 is
The trigger 20 is relatively movably engaged with a long slot 103 a formed in the connecting arm 103 provided on the rotation base end side of the trigger 20. For this reason, the engagement pin 10
1a moves linearly, whereby the resistance value of the first sensor 101 changes. On the other hand, since the engaging pin 102a of the second sensor 102 is relatively movably engaged with the long slot 104 formed in the movable blade 17, the engaging pin 102a is linearly moved with the rotation of the movable blade 17. , Whereby the resistance value of the second sensor 102 changes. First sensor 1
01 and the resistance value of the second sensor 102 are related in advance, and the two sensors 101 and 102 in the state where the trigger 20 is not operated and the movable blade 17 is fully opened.
The difference in the current value caused by the difference in the resistance value of 102 is defined as the reference deviation ΔI0. This reference deviation ΔI0 is
10 are stored in the CPU 51.

The control circuit 110 is shown in FIG. In the control circuit 110, the same components as those of the control circuit 50 according to the embodiment of the present invention are denoted by the same reference numerals, and description thereof is omitted. The CPU 51 has first and second
Current values I1, I based on the resistance values of the sensors 101, 102
2 is entered. In the CPU 51, a deviation .DELTA.I (= I1-I2) between the current values I1 and I2 is obtained and compared with the reference deviation .DELTA.I0. The deviation (ΔI, ΔI0)
When (I-ΔI0) occurs, an ON signal is issued to the PWM switching circuit, whereby the electric motor 4 starts in the forward or reverse direction. Regarding the rotation direction and rotation speed of the electric motor 4, the duty ratio (hour ratio) and the like are appropriately controlled in accordance with the magnitude of the deviation between the two deviations ΔI and ΔI0.

FIGS. 14 to 18 show the operation of the pruning scissors 100 according to the related art . FIG. 14 shows a non-operation state where the trigger 20 is not rotated. At this time, the engagement pin 101a of the first sensor 101 is located at a distance a from the slide start end. On the other hand, the movable blade 17 is in the maximum open state, and at this time, the engagement pin 1 of the second sensor 102 is
02a is located at a distance a 'from the slide start end. From this non-operation state, as shown in FIG.
If you rotate 0 by a certain angle and hold it in that position,
The engagement pin 101a of the first sensor 101 moves to the position of the distance b from the start of the slide, whereby the first sensor 1
01 changes, and consequently the output current value I1 changes. Then, the deviation ΔI from the current value I2 due to the resistance value of the second sensor 102 changes, and accordingly, the reference deviation ΔI0
, The switches 52 and 53 of the PWM switching circuit are turned on, whereby the electric motor 4 starts in the normal rotation direction. When the electric motor 4 starts in the normal rotation direction, the movable blade 17 rotates in the closing direction. When the movable blade 17 rotates in the closing direction, the engaging pin 102a of the second sensor 102 moves to a position at a distance b 'from the slide start end as shown in FIG.
2 changes. At this point, both sensors 101,
The current deviation ΔI based on the resistance value of 102 is the reference deviation ΔI0
And therefore the switch 5 of the PWM switching circuit
2 and 53 are turned off, and the electric motor 4 stops. As described above, the movable blade 17 can be stopped at an arbitrary position by operating the trigger 20 also by the pruning scissors 100 according to the related art .

When the trigger 20 is further rotated from the intermediate stop position to the end as shown in FIG.
The engagement pin 101a of the sensor 101 reaches the position (slide end position) at the distance c from the slide start end, and the resistance value of the first sensor 101 further changes. For this reason,
Current deviation ΔI based on resistance values of both sensors 101 and 102
Causes a deviation from the reference deviation ΔI 0, so that the PWM
The switches 52 and 53 of the switching circuit are turned on to start the electric motor 4, whereby the movable blade 17 further rotates in the closing direction. When the movable blade 17 rotates in the closing direction,
When the deviation of the above-described deviation ΔI is gradually eliminated, and is completely closed as shown in FIG.
2a reaches the c 'position at the end of the slide, and at this time, the deviation between the current deviation .DELTA.I and the reference deviation .DELTA.I0 becomes zero. For this reason, the switches 52 and 53 of the PWM switching circuit are turned off, thereby stopping the electric motor 4.

After the movable blade 17 is closed, the trigger 2
When the zero rotation operation is released, the trigger 20 is released from the torsion spring 21.
, The engagement pin 101a of the first sensor 101 is returned to the slide start end. Then, since a deviation occurs between the current deviation ΔI and the reference deviation ΔI0, the switches 54 and 55 of the PWM switching circuit
Is turned on, whereby the electric motor 4 is started in the reverse rotation direction, and as a result, the movable blade 17 rotates in the opening direction. When the movable blade 17 rotates in the opening direction, the second sensor 10
The second engagement pin 102a gradually approaches the slide start end,
Therefore, the deviation between the current deviation ΔI and the reference deviation ΔI0 is gradually eliminated. When the movable blade 17 is completely opened, the deviation between the current deviation ΔI and the reference deviation ΔI0 becomes zero because the engagement pin 102a of the second sensor 102 reaches the slide start end,
As a result, the switches 54 and 5 of the PWM switching circuit
5 turns off and the electric motor 4 stops. In this way, Seki
Trigger 20 also by the pruning scissors 100 according to the continuous technology
Since the movable blade 17 can be stopped at an intermediate position corresponding to the rotation operation amount of the trigger 20 and can be moved from an arbitrary intermediate position, and the rotation fulcrum 20a of the trigger 20 does not move as in the prior art. the same effects as the embodiment according to.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is a plan view showing an internal structure of electric pruning scissors.

FIG. 2 is a view of the internal structure of the electric pruning scissors viewed from the direction of the arrow (2) in FIG.

FIG. 3 is a diagram of the internal structure of the electric pruning scissors viewed from the direction of the arrow (3) in FIG.

FIG. 4 is a longitudinal sectional view around a volume.

FIG. 5 is a diagram illustrating the operation of the trigger and the movable blade, and is a diagram illustrating a state when the trigger is not operated. In this figure, the movable blade is completely open.

FIG. 6 is a view showing the operation of the trigger and the movable blade, and showing a state where the trigger is rotated to an intermediate position. In this drawing, the state immediately before the movable blade rotates in the closing direction is shown.

FIG. 7 is a diagram illustrating the operation of the trigger and the movable blade, and illustrates a state where the movable blade is closed to an intermediate position.

FIG. 8 is a diagram illustrating the operation of the trigger and the movable blade, and is a diagram illustrating a state where the trigger is rotated to the end. In this drawing, the movable blade is shown in a state immediately before rotating in the closing direction from the intermediate position.

FIG. 9 is a diagram illustrating the operation of the trigger and the movable blade, and is a diagram illustrating a stage where the movable blade is completely closed.

FIG. 10 is a diagram showing a control circuit according to an embodiment of the present invention .

FIG. 11 is a diagram showing a related technique different from the present invention ;
It is a top view of the internal structure of an electric pruning scissor.

12 is a diagram showing the internal structure of the electric pruning scissors viewed from the direction of the arrow (12) in FIG. 11;

FIG. 13 is a diagram showing the internal structure of the electric pruning scissors viewed from the direction of the arrow (13) in FIG. 11;

FIG. 14 is a view showing an operation of a trigger and a movable blade in a related art , and is a view showing a state when a trigger is not operated. In this figure, the movable blade is completely open.

FIG. 15 is a view showing an operation of a trigger and a movable blade according to a related technique , and is a view showing a state where the trigger is rotated to an intermediate position. In this drawing, the state immediately before the movable blade rotates in the closing direction is shown.

FIG. 16 is a view showing an operation of a trigger and a movable blade in a related art , and is a view showing a state where the movable blade is closed to an intermediate position.

FIG. 17 is a view showing the operation of the trigger and the movable blade in the related art , and is a view showing a state where the trigger is rotated to the end. In this drawing, the movable blade is shown in a state immediately before rotating in the closing direction from the intermediate position.

FIG. 18 is a view showing the operation of the trigger and the movable blade in the related art , showing a stage where the movable blade is completely closed.

FIG. 19 is a diagram showing a control circuit according to a related art .

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electric pruning scissors ( this invention ) 4 ... Electric motor 14 ... Output gear 17 ... Movable blade, 17a ... Sector gear 18 ... Fixed blade 20 ... Trigger, 20a ... Support shaft, 20b ... Engagement pin, 20
c ... connecting arm 21 ... torsion spring 30 ... volume (deviation angle detection sensor) 31 ... case 32 ... shaft part 34 ... connecting arm 35 ... connecting arm 50 ... control circuit 51 ... CPU α, β ... case 31 and shaft part 32 Angle deviation ΔI Current deviation ΔI0 Reference deviation 100 Electric pruning scissors ( related technology ) 101 First sensor 101a Engagement pin 102 Second sensor 102a Engagement pin 103 Linking arm 104 Long slot 110: control circuit ΔI0: reference current deviation ΔI: current deviation (I1-I2) I1: current value of the first sensor I2: current value of the second sensor

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Mitsunori Sakai 3-11-8 Sumiyoshi-cho, Anjo-shi, Aichi Prefecture Makita Co., Ltd. (56) References JP-A-5-49331 (JP, A) Akira Mikai 62-29283 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B26B 15/00

Claims (1)

(57) [Claims] An electric motor is driven by a trigger operation.
An electric pruning scissor for rotating a movable blade , wherein the trigger and the movable blade are coaxial and independent from each other.
First a rotor and the second rotor, the both times that rotates
The trigger operation is performed by connecting the trigger to the first rotating body via a deviation angle detection sensor that detects a rotation deviation angle of the rolling body.
The first rotating body provided with rotatable, in tandem with the movable blade to the second rotary member by, the movable blade times
The second rotating body is rotatably provided by rotation, and the movable blade is rotated in a direction to return the rotation deviation angle generated by the trigger operation to a reference value, thereby operating the trigger.
A motor-driven pruning scissors, wherein the rotation of the movable blade is controlled according to the amount .