JP2010081891A - Hedge trimmer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hedge trimmer having high convenience to obtain an excellent finished surface without increasing labor of a worker, such as stretching threads when working. <P>SOLUTION: The hedge trimmer includes a power source, a handle, and a driving blade driven by the power source to reciprocate. A laser optical receiver which puts out a signal when receiving laser on a prescribed position is set on the upper surface of the blade. Since the optical receivers can be plurally set on the upper surface of the blade and each put out a light signal according to the state of the hedge trimmer, a worker can always work in an appropriate condition. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an improvement of a hedge trimmer used for an operation for pruning trees, planting, hedges, and the like into a predetermined shape.

  Conventionally, in this type of hedge trimmer, in order to improve the appearance of the finish, it is required to uniformly arrange the trimming surfaces. In view of this, the worker has put a yarn as a guide in advance at a predetermined height, and trims the trimming surface along the yarn. Also, for example, as in Patent Document 1, the tool body has a level function so that the power tool can be operated while confirming the horizontal and vertical angles without using other members such as a guide. There is something.

JP 2001-277016 A

  However, in the method of tensioning the thread at the time of working, it is necessary not only to put a difficult position in order to stretch the thread, but this is not only a burden for the operator, but also when the hedge trimmer blade hits the thread, the thread breaks. Therefore, it is necessary to re-tension the thread again, which is complicated. Moreover, even if the level function used in the power tool is attached to the hedge trimmer, the angle of the hedge trimmer itself can be maintained, but it is difficult to adjust the relative height and position with respect to the work surface, and the trimming surface is It will wave.

  An object of the present invention is to realize a hedge trimmer capable of obtaining a good finished surface without increasing the number of workers.

  Of the inventions disclosed in the present application, typical features will be described as follows.

  According to one aspect of the present invention, in a hedge trimmer having a power source, a handle, and a driving blade portion that is driven by the power source and reciprocates, a light receiving unit that emits a signal when receiving a laser beam; and An informing means for receiving the signal and informing a light receiving state of the laser receiver is provided.

  According to another feature of the invention, the light receiving means can be provided on the upper surface of the blade portion. Here, the lower side where the object to be trimmed in the direction perpendicular to the trimming direction by the blade portion is referred to as the lower surface portion, and the opposite side is referred to as the upper surface portion.

  According to still another feature of the present invention, a plurality of the light receiving means may be provided, and the notification means may be configured to notify the parallel state by recognizing a plurality of signals.

  According to still another feature of the present invention, the light receiving means may include at least three light receiving elements, and the notification means may be configured to notify a light receiving state corresponding to each of the light receiving elements. .

  According to still another feature of the present invention, the notification means can be an optical signal.

  According to still another feature of the present invention, the light receiving means can be provided with a band pass filter for extracting a signal of a predetermined frequency band from the received laser.

  According to still another feature of the present invention, the light receiving means can be mounted on the blade portion so as to be rotatable and fixable.

  According to still another feature of the present invention, the light receiving means can be attached to the blade portion so as to be vertically slidable and fixable.

  According to still another feature of the present invention, the notification unit can be movable with respect to the light receiving unit.

  According to still another feature of the present invention, the light receiving means can receive laser light from one or more laser marking devices.

  According to the first aspect of the present invention, there is provided a light receiving means for emitting a signal when receiving a laser, and a notifying means for receiving the signal of the light receiving means and notifying the light receiving state of the laser receiver. With proper preparation, it is possible to accurately plant, hedge and plant along a predetermined line.

  According to the invention of claim 2, since the light receiving means is provided on the upper surface portion of the blade portion, the light receiving means can be arranged near the trimming surface to be set, so that it is easier.

  According to the invention of claim 3, a plurality of the light receiving means are provided, and the notification means is configured to notify the parallel state by recognizing a plurality of signals. It becomes possible to recognize the state.

  According to a fourth aspect of the present invention, the light receiving means has at least three light receiving elements, and the notifying means is shifted upward by notifying a light receiving state corresponding to each of the light receiving elements. That is, it is possible to detect each state that it is within an appropriate range and to be informed, and to notify the operator, and it is possible to accurately instruct the operator to correct the position of the hedge trimmer.

  According to the fifth aspect of the present invention, the state of the hedge trimmer can be confirmed without being blocked by noise during operation by using the notification means as an optical signal.

  According to the sixth aspect of the present invention, the light receiving means is provided with a band-pass filter for extracting a signal in a predetermined frequency band from the received laser, so that the influence of disturbance light can be suppressed.

  According to the seventh aspect of the present invention, the light receiver can be rotatably and fixedly mounted on the blade portion, so that the trimming direction, the laser beam scanning direction, and the operator's direction can be set freely.

  According to the invention of claim 8, the light receiver can be prevented from being blocked by a cutting object by being attached to the blade portion so as to be slidable and fixable up and down.

  According to the ninth aspect of the present invention, the light receiving device is provided with a display unit for displaying a light receiving state signal, and the display direction of the display unit can be changed separately from the light receiving device. Can always check the display unit in the same orientation, and can prevent the operator from making a mistaken determination.

  According to the tenth aspect of the present invention, the light receiver can easily and accurately set the horizontal and vertical by receiving the laser light of one or more laser marking devices, and can be easily set. According to the above configuration, it is possible to simply perform a trimming operation of a plant or the like by a hedge trimmer with high degree of freedom according to surrounding conditions.

  The above and other objects and novel features of the present invention will become apparent from the following description and drawings.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an appearance of a hedge trimmer according to a first embodiment of the present invention, FIG. 2A is a front view of a light receiving surface of a light receiver commonly provided in the embodiment of the present invention, and FIG. 2 (2) is a plan view when the light receiver of FIG. 2 (1) is confirmed from the upper side of the worker side, FIG. 3 is a circuit configuration inside the light receiver of FIG. 2, and FIG. 4 is a microcomputer provided inside the light receiver. FIG. 5 and FIG. 6 are reference diagrams showing a working state using the hedge trimmer according to the present invention.

In FIG. 1, a hedge trimmer 1 has handles 3 a and 3 b before and after an engine 2 as a power source, and a crankshaft (not shown) extends from the lower part of the engine 2. The blade portion 4 is attached to the crankshaft via an eccentric cam, and includes a driving blade 4b that is sandwiched between the fixed blades 4a and reciprocates in the front-rear direction of the hedge trimmer 1. The fixed blade 4a and the drive blade 4b are provided on the left and right with respect to the extending direction of the blade portion 4, and the hedge trimmer 1 is slid in the direction indicated by C by the shearing force between the fixed blade 4a and the drive blade 4b. When this is done, the object ahead in the direction of travel can be cut.
Two light receivers 11 and 21 as light receiving means are disposed in the vicinity of the tip of the blade 4 and on the fixed blade 4a in the vicinity of the engine 2 side. On the side surfaces of the light receivers 11 and 21, there are light receiving surfaces 12 and 22 for receiving laser light, and further on the top surface there are provided display units 13 and 23 for notifying the worker of the light receiving state of the light receiving means. Yes. The light receivers 11 and 21 are rotatable on the blade portion 4 and fixedly attached. In addition, since the light receivers 11 and 21 have a built-in battery, they can operate alone, and can be arbitrarily attached to and detached from the blade portion 4.

  In FIG. 2A, the light receiver 11 has a light receiving surface 12 on the side surface, and the light receiving surface 12 has a resin window that transmits laser light and shields excess light, and senses light behind it. Photodiodes 14 a, 14 b and 14 c are arranged in series in a vertical direction perpendicular to the extending direction of the blade portion 4. When the photodiodes 14a, 14b, and 14c detect light, they generate a current corresponding to the intensity of the light. The vertical length of the photodiode 14b is preferably about 5 mm to 20 mm, and the vertical length of the photodiodes 14a and 14c is preferably longer than the vertical length of the photodiode 14b. When the length is 5 mm or less, it is difficult for the operator to perform the work in an appropriate range in the hand-held work, and the usability is poor. In addition, if the length exceeds 20 mm, the trimming finish becomes worse.

  Further, in FIG. 2B, the light receiver 11 has a display unit 13 on the upper surface portion that can be confirmed by an operator, and LEDs 13a, 13b, 13c, and 13d are arranged on the display unit 13 to emit light. Shows the position state of the blade portion 4 to the operator. As described above, the light receiver 11 is installed so as to be rotatable and fixed on the blade portion 4, but the display portion 13 rotates relative to the blade portion 4 even if the light receiver 11 rotates. Since it is fixed, it is easy for the operator to recognize.

  Here, since the light receivers 11 and 21 have the same configuration, the description of the light receiver 21 is omitted.

  In FIG. 3, the light receiver 13 includes a circuit for changing the display unit 13 in accordance with the state of the light receiving surface 12. The light receiving surface 12 generates, for example, a current corresponding to the intensity of light when light strikes the photodiode 14a, converts this current into a voltage by the IV conversion circuit 15a, and further converts it by a bandpass filter 16a. Only the signal in the predetermined frequency range is extracted, the signal is amplified by the amplifying unit 17a, and input to the microcomputer 19. The voltage value of the input signal is converted into a digital value by an A / D converter built in the microcomputer. Similarly, the other photodiodes 14b and 14c are input to the microcomputer 19 through the IV conversion units 15b and 15c, the band-pass filters 16b and 16c, and the amplification units 17b and 17c.

  The laser beam emitted from the laser marking machine is modulated by suppressing the laser output in order to continuously output high-intensity light so that it can be easily seen with the naked eye, and to suppress current consumption and detect with the receiver. In some cases, laser light is output. In the latter case, the light receiver 11 detects only a signal in the vicinity of a predetermined frequency obtained by modulating the laser light through the band-pass filter 16a with respect to the optical signal input to the light receiving surface 12, so that it can be used under bright external light or a fluorescent lamp. Even under pulsed light, disturbance light and laser light can be distinguished and reliably detected.

  The microcomputer 19 is driven by the power from the power supply unit 18, and when the microcomputer 19 is driven, the LED 13d in the display unit 13 is turned on to indicate that it is in a movable state. The other LEDs 13 a, 13 b and 13 c in the display unit 13 are controlled to be turned on and off by the output of the microcomputer 19. The LEDs 13a, 13c, and LED 13b are easy to visually recognize if they have different colors. For example, the LED 13b is green, the LED 13a is red, and the LED 13c is orange. Alternatively, the LED 13b is green, and the LED 13a and LED 13c are red.

  In FIG. 4, when power is supplied from the power supply unit 18 to the microcomputer 19, the microcomputer is activated (S1). When the modulated laser beam is not incident on the photodiode 14a, as described above, the output from the amplifier 17a to the microcomputer, that is, the output of the photodiode 14a is equal to or lower than the threshold (S2, N), and the LED 13a is turned off. (S4). On the other hand, when the modulated laser beam is incident on the photodiode 14a, as described above, the output from the amplifier 17a to the microcomputer, that is, the output of the photodiode 14a is equal to or greater than the threshold (S2, Y), and the LED 13a. Lights up (S3). The photodiodes 14b and 14c operate in the same manner, and the microcomputer controls the turning-off and lighting of the LEDs 13b and 13c, respectively.

  That is, when the laser light is incident on the photodiode 14 a on the light receiving surface 12 of the light receiver 11, the LED 13 a on the display unit 13 is turned on, indicating that the light is applied on the light receiving surface 12. This state also indicates that the height of the hedge trimmer is lower than the desired position, and prompts the operator to raise the height of the hedge trimmer 1. Similarly, when the laser light is incident on the lower photodiode 14c, the LED 13c of the display unit 13 is turned on, indicating that the light hits the lower part of the light receiving surface 12. This state also indicates that the height of the hedge trimmer is higher than the desired position, and prompts the operator to lower the height of the hedge trimmer 1. In addition, when laser light is incident on the photodiode 14b, the LED 13b of the display unit 13 is turned on, indicating that it is at an appropriate height.

Next, the operation of the hedge trimmer according to the first embodiment of the present invention will be described with reference to FIG. First, the laser marking machine 30 is placed on a tripod or the like at a predetermined height, and the laser beam 31 is irradiated in the hedge direction. For example, when the height is leveled, the laser beam 51 can be scanned and output by the function of the laser marking machine 50 on the horizontal plane. A vertical case is possible as well. The scanning height of the laser light needs to be determined in consideration of the height difference between the blade surface of the hedge trimmer 1 and the center position of the photodiode 14b of the light receiving surface 12, but the height difference is fixed in advance. Therefore, the scanning height of the laser beam may be set by adding the values. In the present embodiment, since the light receivers 11 and 12 are provided on the blade portion 4, the difference in height to be taken into consideration is as small as possible, so that the setting complexity is suppressed.
Since the hedge trimmer 1 of the present invention is mainly used outdoors and works under bright sunlight, the laser beam 31 of the laser marking machine 30 is hardly visible with the naked eye. However, as described above, by modulating the laser beam 31, the light receiver 11 can distinguish between the sunlight, which is continuous light, and the laser beam 31, and can ensure detection. Furthermore, the power consumption of the laser marking machine 30 to be used can be reduced, and the movable time of the laser marking machine 30 can be extended. The height at the initial position can be set using a commercially available light receiver or the light receivers 11 and 21.

  The hedge trimmer 1 determines the light receiving surface 12 of the light receiver 11 in the direction of the laser marking machine 30, and trims the hedge 100 in the C direction from the laser marking machine 30 side of the hedge 100. At this time, when the LED 13b of the display unit 13 on the upper surface of the light receiver 11 is lit, the light is received at an appropriate place of the light receiver 11 and is at an appropriate height, so the height of the hedge trimmer 1 is set to the LED 13b. Set so that lights up.

  When the LED 13a of the display unit 13 is lit, it indicates that the height of the hedge trimmer 1 is lower than the desired position, and prompts the operator to raise the height of the hedge trimmer 1. Similarly, when the LED 13c of the display unit 13 is lit, it indicates that the height of the hedge trimmer 1 is higher than the desired position, and prompts the operator to lower the height of the hedge trimmer 1.

  When the LED 13b is lit on the light receiver 11 on the tip end side of the blade part 4 and the light receiver 21 on the engine 2 side, the blade edge and the hand are in an appropriate height range. If the hedge trimmer 1 is moved in the depth direction of FIG. 5 and the hedge is trimmed while maintaining this state, the level can be maintained and trimmed straight. The operator can concentrate on cutting the hedge while looking at the display portions 13 of the light receiver 11 on the tip side of the blade 4 and the light receiver 21 on the engine 2 side, which is convenient.

  For example, when the LED 13a of the light receiver 11 at the tip of the blade 4 is turned on, the operator adjusts the hedge trimmer 1 to raise the blade tip, and when the LED 13a of the light receiver 21 on the engine side is turned on, The operator may adjust the hedge trimmer 1 so that the front side is raised. As described above, in this embodiment, since the position of the light receiving unit and the display unit indicating the light receiving state are provided close to each other, the determination when the operator corrects the height of the hedge trimmer 1 is not complicated and easy. The trimming height can be adjusted.

  It should be noted that a single photodiode 14 of the light receiver 11 may be used, and a warning lamp may be emitted when it is out of the proper range, but in that case, the hedge trimmer 1 is displaced above or below the proper range. It is inconvenient because the worker does not know if it is. In addition, the two photodiodes 14 of the light receiver 11 may be arranged so that the warning light is emitted when they are shifted upward and downward, but they are shifted outward from the upper and lower ranges of the light receiving surface 12. Sometimes it is inconvenient because it is indistinguishable from the display in the proper range. In addition, there may be a case where control is performed by using two photodiodes 14 and determining that they are within an appropriate range when receiving light simultaneously, but the laser linearity output from the laser marking machine is about 1 mm. Therefore, it is difficult to adjust to an appropriate range, which is inconvenient for the operator.

  Moreover, since the light receivers 11 and 21 are detachable with respect to the blade part 4, an operator selects the presence or absence of the light receivers 11 and 21 as needed, such as when an accurate work is not required. In addition, the light receivers 11 and 21 can be removed and stored at the time of storage, and damage and abnormalities can be prevented.

  In the figure showing an example of work using the hedge trimmer 1 according to the first embodiment of the present invention shown in FIG. 5, the handles 3a and 3b are in the right direction in the figure, so the operator needs to work from the right direction in the figure. . Although the light receivers 11 and 21 face the light receiving surface 12 toward the front side, the light receivers 11 and 21 are installed so as to be rotatable with respect to the blade portion 4 and can be directed toward the back side. When an operator wants to work from the left side of the figure, the light receiving surface 12 of the light receiver 11 is installed facing the opposite side, so that the hedge trimmer 1 can be turned to the opposite side and the work can be performed from the left side of FIG. Become. Further, when the object to be trimmed extends to the near side in FIG. 5 and the inking machine 30 cannot be installed at the position shown in FIG. 5, the light receiving surface 12 is rotated and fixed so as to face the installation place of the inking machine 30. Thus, the same operation can be performed. In this way, by changing the direction of the light receiving surface 12 of the light receiver 11, the relationship between the operator's position and the pruning direction can be freely changed according to the surrounding situation, thereby improving convenience.

  In the figure showing another working example using the hedge trimmer 1 according to the first embodiment of the present invention shown in FIG. 6, two laser marking machines 30 and 32 are used, and laser light is also applied to the side surface of the hedge 100. By irradiating, the height can be positioned at the front end and the rear end in the trimming direction, and the hedge 100 can be trimmed more accurately. Furthermore, it can be used when the hedge 100 is cut diagonally by providing an inclined line with the laser marking machines 30 and 32. For positioning at the front end and the rear end, a general laser receiver or a receiver 11 removed from the hedge trimmer may be used. Further, the laser beam 31 from the laser marking machine 30 on the blade edge side is incident on the light receiver 11 on the tip side of the blade part 4, and the laser beam 33 from the laser marking machine 32 on the near side is the engine 2 side. It is sufficient that the light enters the light receiver 21.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In FIG. 7, a hedge trimmer 51 has handles 53 a and 53 b before and after an engine 52 that is a power source, and a blade portion 54 is attached to the engine 52. The blade portion 54 includes a fixed blade 54 a and a drive blade 54 b that is sandwiched between the fixed blade 54 a and reciprocates by the power of the engine 52. The fixed blade 54a and the driving blade 54b are attached to the left and right with respect to the extending direction of the blade portion 54, and the object is cut by the shearing force between the fixed blade 54a and the driving blade 54b. Yes. Accordingly, the object can be cut by moving the hedge trimmer 51 to the left and right.

  Two column portions 70 and 71 are disposed on the upper surface of the fixed blade 4a near the tip of the blade 4 and near the engine 2 side. A light receiver 61 is installed on the pillars 70 and 71 so as to be vertically slidable and fixable with respect to the blade part 4. Two light receiving surfaces 62 and 72 for receiving laser light are attached to the side surface of the light receiver 61, and two display portions 63 and 73 are provided on the upper surface portion.

  A scale 80 is described at the center height of the photodiode 14 b of the light receiver 61, and the column portions 70 and 71 also have a scale 81 indicating the height from the cut surface 54. From these scales 80 and 81, the height from the cut surface 54 to the center of the photodiode 14b is known, and can be set to an arbitrary height.

  In addition, since the light receiving surfaces 62 and 72 are connected by the bridge portion 64, when positioning the height, the height of the plurality of light receiving surfaces can be made the same and easily parallel to the blade portion. Can be put out.

  Furthermore, the light receiver 61 is installed so that the direction can be changed toward the front side and the back side with respect to the column portions 70 and 71, and the light receiving portions 62 and 72 are moved left and right with respect to the extending direction of the blade portion 54. It is directed to either direction so that it can handle either the right or left trimming direction. The column portions 70 and 71 and the light receiver 61 may be detachable.

  The structures of the light receiving surfaces 62 and 72 and the display surfaces 63 and 73 of the light receiver 61 are the same as those shown in FIGS. 2 (1) and 2 (2) b, and the circuit configuration is the same as that shown in FIGS. Description is omitted.

  The operation of the hedge trimmer according to the second embodiment of the present invention will be described with reference to FIG. The laser marking machine 30 is placed on a tripod or the like at a predetermined height, and the hedge 100 is irradiated with the laser beam 31. As described above, the height from the cut surface 54 of the hedge trimmer 51 to the center of the photodiode 14b of the light receiving surfaces 62 and 72 can be set to an arbitrary value, and the value of the height can be easily understood by the scales 80 and 81. The output height of the laser beam 31 may be determined in consideration of the height difference.

  The hedge trimmer 51 determines the light receiving surfaces 62 and 72 of the light receiver 61 in the direction of the laser marking machine 30, and trims the hedge 100 in the C direction from the opposite direction of the laser marking machine 30 of the hedge 100. At this time, when the LEDs 13b of the display units 63 and 73 on the upper surface of the light receiver 61 are lit, the light is received at an appropriate place of the light receiver 61 and is at an appropriate height. Are adjusted so that the LED 13b lights up.

  As described above, when the LED 13a of the display unit 63 is lit, it indicates that the height of the hedge trimmer 51 is lower than the desired position, and prompts the operator to raise the height of the hedge trimmer 51. Similarly, when the LED 13c of the display unit 63 is lit, it indicates that the height of the hedge trimmer 51 is higher than the desired position, and prompts the operator to lower the height of the hedge trimmer 51.

  When the LEDs 13b of the display portions 63 and 73 of the light receiver 61 on the distal end side of the blade portion 54 are lit, the blade edge and the hand are in an appropriate height range. If the hedge trimmer 51 is moved in the direction C in FIG. 8 and the hedge is trimmed while maintaining this state, the level can be maintained and trimmed straight. The operator can concentrate on trimming the hedge while looking at the display portions 63 and 73 on the distal end side of the blade portion 54 and the engine 52 side, which is convenient. For example, when the LED 13a of the display portion 63 at the tip of the blade portion 54 is lit, the operator adjusts the hedge trimmer 1 to raise the blade edge, and when the LED 13a of the display portion 73 at the engine side portion is lit, The operator may adjust the hedge trimmer 51 so that the front side is raised.

  The light receiver 61 is slidable in the vertical direction with respect to the blade portion 54. If the height of the light receiver 61 is set higher than the height of the portion to be cut from the cutting position, the laser is not obstructed by the portion to be cut. The laser beam 31 of the summing machine 30 can be received. As a result, it is possible not only to trim away from the laser marking machine 30, but also to trim toward the laser marking machine 30, and work such as the installation location of the laser marking machine 30 and the operator's orientation. The degree of freedom can be improved, and the use conditions can be changed according to the surrounding constraint conditions, so that convenience is improved.

  The hedge trimmer according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims.

  For example, in this embodiment, the light receivers 11 and 21 as the light receiving means are driven by a battery provided inside the light receivers 11 and 21, but a battery is provided in the main body of the hedge trimmer 1, and the engine 2 is illustrated. Even if power is generated by an ignition coil that does not, it is possible to produce an effect that it is possible to accurately plant, hedge, and plant a plant along a predetermined line with a simple preparation. Moreover, according to this, work can be performed without worrying about running out of the battery. However, at this time, it is necessary to connect the cable from the light receivers 11 and 21 to the hedge trimmer 1, and it is necessary to fix the cable along the fixed blade 4a of the blade portion 4 in order to prevent the cable from being loosened or disconnected. In addition, since it is necessary to devise the attachment between the light receivers 11 and 21 and the cable in order to remove the light receivers 11 and 21, the battery is built in and operated independently as in the embodiment of the present invention. Is desirable.

  Moreover, although it was set as the structure which has arrange | positioned the light receivers 11 and 21 on the upper side of the blade part 4, when using the chip receiver which collects the cut grass for fixing to the blade part 4, it should be attached to the front-back direction of a chip receiver. In this case, it is desirable to arrange the light receiver at a position that does not interfere with the grass collection of the chip receiver.

  In addition, although one photodiode 14 is arranged on the light receiving surfaces 12 and 22 of the light receivers 11 and 21 at the same height, a plurality of photos are arranged on the outer peripheral surface of the light receivers 11 and 21 in the circumferential direction. If the diode 14 is arranged, lasers from a plurality of directions can be detected without rotating the light receiver.

Moreover, although the example which used the engine as a motive power source of a hedge trimmer was demonstrated, you may use a motor, without limiting to an engine. In that case, a battery may be used or connected to an AC power source. Furthermore, the display may be displayed using 7 segments.

The perspective view of the hedge trimmer by 1st embodiment of this invention. (1) The side view of the light receiver by 1st embodiment of this invention, (2) The top view of the light receiver by 1st embodiment of this invention. 1 is a circuit block diagram of a light receiver according to a first embodiment of the present invention. The operation | movement flowchart of the microcomputer of the light receiver by 1st embodiment of this invention. The trimming operation diagram of the hedge trimmer according to the first embodiment of the present invention. The other trimming operation | movement figure of the hedge trimmer by 1st embodiment of this invention. The perspective view of the hedge trimmer by 2nd embodiment of this invention. Pruning operation diagram of hedge trimmer according to the second embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 51: Hedge trimmer 2, 52: Engine 3a, 3b, 53a, 53b: Handle 4: Blade part 4a: Fixed blade part 4b: Driving blade part 11, 21, 61: Light receiver 12, 22, 62, 72: Light reception Surfaces 13, 23, 63, 73: Display units 13a, 13b, 13c, 13d: LEDs 14a, 14b, 14c: Photodiodes 15a, 15b, 15c: IV conversion units 16a, 16b, 16c: Filters 17a, 17b, 17c: amplification unit 18: power supply unit 19: microcomputer 30, 32: laser marking device 21, 33: laser beam scanning surface 100: hedge

Claims (10)

Power source,
A handle,
In a hedge trimmer having a driving blade driven by the power source and reciprocating,
A hedge trimmer comprising: a light receiving unit that emits a signal when receiving a laser; and a notification unit that receives the signal of the light receiving unit and notifies a light receiving state of the laser receiver.   The hedge trimmer according to claim 1, wherein the light receiving means is provided on an upper surface portion of the blade portion.   The hedge trimmer according to claim 2, wherein a plurality of the light receiving means are provided, and the informing means notifies the parallel state by recognizing a plurality of signals.   4. The light receiving unit according to claim 1, wherein the light receiving unit includes at least three light receiving elements, and the notification unit reports a light receiving state corresponding to each of the light receiving elements. The hedge trimmer described in the paragraph.   The hedge trimmer according to any one of claims 1 to 4, wherein the notification means is an optical signal.   The hedge trimmer according to any one of claims 1 to 5, wherein the light receiving means is provided with a band pass filter for extracting a signal in a predetermined frequency band from the received laser.   The hedge trimmer according to any one of claims 1 to 6, wherein the light receiving means is rotatably and fixedly attached on the blade portion.   The hedge trimmer according to any one of claims 1 to 7, wherein the light receiving means is attached to the blade portion so as to be slidable and fixable up and down.   The hedge trimmer according to any one of claims 1 to 8, wherein the notification unit is movable with respect to the light receiving unit.   The hedge trimmer according to any one of claims 1 to 9, wherein the light receiving means receives laser light from one or more laser marking devices.

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