Work machine

Abstract

To improve workability of a work machine.SOLUTION: A blower includes a motor, an operation unit that can move from an initial position by the operator's operation, and a control unit that controls driving of the motor in accordance with the operation state of the operation unit, and can detect the position of the operation unit. The control unit performs control by switching to a plurality of operation modes including a normal mode and an on-lock mode. The control unit drives the motor while the operation unit is positioned in an on region and stops the driving of the motor while the operation unit is positioned in an off region in the normal mode, and drives the motor irrespective of the position of the operation mode in the on-lock mode. In the normal mode, when the control unit carries out switching operation including positioning of the operation unit in the on region a plurality of times, the mode is switched to the on-lock mode. In the on-lock mode, the control unit can set the rotation speed of the motor in accordance with a movement amount from the initial position of the operation unit in the switching operation.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a working machine such as a blower.

Background Art

[0002] As an example of a working machine, a blower is known that includes a fan rotated by the driving force of a motor, a housing portion that houses the motor and the fan, and a nozzle portion that discharges air along an air flow generated by the rotation of the fan.

[0003] As such a blower, for example, Patent Document 1 discloses a blower whose rotation speed can be changed according to the operation amount of a trigger. When an operator operates a tactile switch provided separately from the trigger, this blower performs an on-lock.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the configuration of the blower (working machine) described in the above - mentioned Patent Document 1, when performing an on - lock, the operator needs to operate both the trigger and the tactile switch. Therefore, there is room for further improvement in the operability when performing an on - lock. Also, providing two components, the trigger and the tactile switch, as operation parts has led to an increase in the size of the working machine, so there is room for further simplification of the configuration.

[0006] Another object of the present invention will become clear from the description of the embodiments described later.

Means for Solving the Problems

[0007] The working machine according to the present invention includes a motor, an operation unit that can be moved from an initial position by an operator's operation, and a control unit that controls the driving of the motor according to the operation state of the operation unit and can detect the position of the operation unit. The control unit performs control to switch between a plurality of operation modes including a normal mode and an on-lock mode. Specifically, in the normal mode, the control unit drives the motor while the operation unit is located in the on-region and stops the driving of the motor while the operation unit is located in the off-region. Further, in the on-lock mode, the control unit drives the motor at a fixed rotational speed regardless of the position of the operation unit. Furthermore, when a switching operation including the operation unit being located in the on-region a plurality of times is performed in the normal mode, the control unit switches to the on-lock mode, and in the on-lock mode, the control unit controls the operation of the motor so as to fixedly set the rotational speed of the motor according to the amount of movement of the operation unit from the initial position in the switching operation.

Advantages of the Invention

[0008] According to the present invention, the workability of the working machine can be improved.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Best Mode for Carrying Out the Invention

[0010] Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. In this embodiment, as an example of a working machine, the blower 1 will be taken up and described. As shown in FIG. 1, the blower 1 is a working machine that discharges the air taken in from the back surface from a nozzle provided on the front surface side and blows the air onto a working location or the like, and is also called an air duster or the like.

[0011] Regarding the configuration of the blower 1, a motor 10, a fan 10a that rotates by the driving force of the motor 10 and generates an air flow F1 in the axial direction C1 along the rotation axis of the motor 10, a housing part 2 that houses the motor 10 and the fan 10a inside and has an exhaust part 12 on the front (one) side in the axial direction C1, and a main nozzle (nozzle part) 6 that is formed in a cylindrical shape and is detachably attached to the exhaust part 12 are provided.

[0012] The housing part 2 includes a motor case (first housing part) 3 that houses the motor 10 and the fan 10a inside and has an exhaust part 12, a handle part 4 that extends from the motor case 3 along a direction (vertical direction) intersecting the axial direction C1, and a battery mounting part (second housing part) 5 that is connected to the handle part 4 so as to be located on the side opposite to the motor case 3 with the handle part 4 interposed therebetween.

[0013] In other words, the motor case 3 and the battery mounting part 5 extend along the axial direction C1 so as to be substantially parallel to each other at both ends of the handle part 4. That is, one end of the handle part 4 is connected to the motor case 3, and the other end of the handle part 4 is connected to the battery mounting part 5. The housing part 2 has two housing halves formed of a synthetic resin such as nylon or polycarbonate, and the housing part 2 is assembled by butting these two housing halves together.

[0014] In the blower 1 of the present embodiment, the direction along the rotation axis of the motor 10 is defined as the axial direction C1, which is also referred to as the front-rear direction. Further, the direction (extending direction E1) that intersects the front-rear direction and in which the handle portion 4 extends is defined as the vertical direction. Also, the direction orthogonal to the front-rear direction and the vertical direction is defined as the left-right direction.

[0015] As shown in FIG. 2, the motor 10 and the fan 10a are housed in the motor case 3. The motor 10 has a stator 10b that is a coil and a rotor 10c that is a magnet, and is, for example, a brushless motor. The fan 10a is a centrifugal fan attached to the rotation axis of the rotor 10c, and sends out the air taken in from the intake portion 11 at the rear of the motor case 3 toward the main nozzle 6 attached to the front side of the motor case 3. Specifically, in the motor case 3, the motor 10 including the fan 10a is provided in a cylindrical container. The main nozzle 6 is an example of a nozzle.

[0016] The motor 10 takes in air through the mesh portion 11a of the intake portion 11 due to the rotation of the fan 10a, and sends out the taken-in air along the inner wall 10d of the cylindrical container toward the main nozzle 6. At this time, an air flow F1 flowing along the axial direction C1 is generated by the rotation of the fan 10a, and the air sent by the air flow F1 is discharged from the tip of the main nozzle 6.

[0017] Further, a motor substrate 10e on which a sensor for detecting the inverter circuit of the motor 10 and the rotational position of the rotor 10c is mounted is attached to the motor 10, and this motor substrate 10e is also housed in the motor case 3.

[0018] In addition, the handle portion 4 is provided so as to protrude forward (one side) in the axial direction C1 on the motor case 3 side, and has a trigger (operation portion) 9 that can be pressed (pulled by gripping) by an operator (not only a human but also a robot or the like). The trigger 9 is configured to be reciprocally movable integrally with a trigger switch 9A described later in FIG. 4, and is configured to be able to detect the operation amount (pull amount) of the trigger (see the trigger switch detection amount detection unit 87 and the control unit 100 shown in FIG. 4 as appropriate).

[0019] Furthermore, inside the handle portion 4, a control board 8 equipped with a microcomputer is provided. In addition, a battery pack 7 that supplies power to the motor 10 is detachably mounted on the battery mounting portion 5. Therefore, when the trigger 9 is operated, the fan 10a rotates by the driving force of the motor 10, and an air flow F1 is generated in the axial direction C1 by the rotation of the fan 10a. In this way, the air taken in from the rear intake portion 11 is sent forward as the air flow F1 and discharged from the tip of the main nozzle 6.

[0020] As shown in FIG. 2, directly below the exhaust portion 12 of the motor case 3, a protruding portion 15 that protrudes forward from the motor case 3 is provided. The protruding portion 15 includes an LED 17 that brightly illuminates the location where the air is blown, and an upper holding portion (first holding portion) 13 adjacent to it. That is, by providing the LED 17 on the protruding portion 15 that protrudes forward from the motor case 3, the working place can be made brighter.

[0021] Next, the structure of the main nozzle 6 provided in the blower 1 will be described with reference to FIGS. 1 to 3. The main nozzle 6 is formed in a cylindrical shape, and the diameter of the other end side portion is larger than that of the one end side portion.

[0022] Specifically, the base end side portion (the other end side portion) 6b attached to the exhaust portion 12 of the motor case 3 shown in FIG. 2 is provided with an intake port 6d as a nozzle, and the tip end side portion (one end side portion) 6a located on the side opposite to the base end side portion 6b is provided with an exhaust port 6e as a nozzle. In the main nozzle 6, the base end side portion 6b is thicker than the tip end side portion 6a and has a tapered shape that becomes thinner toward the tip end side. Therefore, the relationship is such that the diameter D2 of the intake port 6d of the base end side portion 6b > the diameter D1 of the exhaust port 6e of the tip end side portion 6a. Further, a convex portion (see FIG. 2) is formed on the outer periphery of the base end side portion 6b.

[0023] FIG. 3 is a side view showing a state in which the main nozzle is removed from the working machine shown in FIG. 1. As shown in FIG. 3, in the blower 1 of the present embodiment, the main nozzle 6 removed from the exhaust portion 12 can be fitted (in other words, housed) into the motor case 3.

[0024] When attaching the main nozzle 6 to the exhaust portion 12 of the motor case 3, the convex portion of the base end side portion 6b of the main nozzle 6 is fitted into a groove portion (not shown in detail) provided in the exhaust portion 12, and by rotating the base end side portion 6b, the main nozzle 6 can be attached to the motor case 3. Note that the main nozzle 6 is formed of, for example, hard rubber or the like.

[0025] FIG. 4 is a block circuit diagram showing the configuration of the control system of the working machine shown in FIG. 1. As shown in FIG. 4, the blower 1 includes a configuration in which a motor output unit 30, a battery pack 7, and a board unit 80 are electrically connected.

[0026] Among these, the motor output unit 30 includes the above-described motor 10 and a motor control unit 31 for controlling the power supplied to the motor 10 and thus the operation of the motor 10. The motor control unit 31 controls the operation (rotation mode) of the motor 10 based on a control signal output from a control signal output circuit 82 described later. Further, the motor control unit 31 detects the rotational speed of the motor 10 and supplies the detection result to the control unit 100 through a rotational speed detection circuit 81.

[0027] The battery pack 7 is, for example, a rechargeable secondary battery (such as a lithium-ion battery), and as shown in FIG. 4, has a structure in which a plurality of batteries are housed (packed) in a predetermined container or the like in a state where they are connected in series.

[0028] The substrate unit 80 mainly includes a plurality of circuits mounted on the above-described control substrate 8. Specifically, the substrate unit 80 includes connectors 88 and 89 connected to the trigger switch 9A of the above-described trigger (operation unit) 9, and a rotation speed detection circuit 81 and a control signal output circuit 82 connected to the motor control unit 31 of the motor output unit 30.

[0029] Also, as shown in FIG. 4, the substrate unit 80 includes a current detection circuit 83, a power switch circuit 84, a power supply circuit 85, a trigger switch operation detection circuit 86, a trigger switch operation amount detection unit 87, and a control unit 100 that controls each of the above-described circuits (each block).

[0030] The current detection circuit 83 is connected to the negative electrode sides of the battery pack 7 and the motor control unit 31 in the motor output unit 30, and outputs the detected current value to the control unit 100. The power switch circuit 84 is connected to the battery pack 7, and outputs whether the main power switch (not shown) is on or off to the power supply circuit 85. When the power supply circuit 85 receives a signal from the power switch circuit 84 indicating that the main power switch is on, it applies a predetermined voltage to the control unit 100.

[0031] The trigger switch operation detection circuit 86 detects the presence or absence of an operation of the trigger switch 9A, and outputs the detection result to the control unit 100. The trigger switch operation amount detection unit 87 detects the operation amount of the trigger switch 9A (substantially corresponding to the amount of pulling of the trigger 9), and outputs the detection result to the control unit 100.

[0032] The control unit 100 is a hardware processor such as a CPU or a microcomputer. The control unit 100 outputs a control signal to the motor control unit 31 through the control signal output circuit 82 according to the detection results of the trigger switch operation detection circuit 86 and the trigger switch operation amount detection unit 87.

[0033] Next, the conventional configuration regarding the on-lock drive and the outline of the main parts in the present embodiment will be described.

[0034] In the conventional configuration of the working machine, regarding the on-lock drive, it was configured as follows. For example, when a trigger fixed switch (the above-described tactile switch) (not shown) is operated to be on and the trigger 9 is pulled, for example, to the maximum amount, the rotation speed of the motor 10 is controlled to be fixed regardless of the operation amount (pull amount) of the trigger 9, and the on-lock drive is performed. Note that the trigger fixed switch may have either an electrical configuration or a mechanical configuration.

[0035] However, in the conventional configuration as described above, since a trigger fixed switch is used, the cost increases. Also, in the above conventional configuration, there is room for improvement in the workability (operational complexity) of the operator when shifting to the on-lock drive. Furthermore, the above conventional configuration is considered to be a limitation (so to speak, a fetter) for developing a multi-stage on-lock drive, in other words, a specification for fixing the rotation speed of the motor 10 in multiple stages.

[0036] Therefore, in the present embodiment, regarding the on-lock drive, the following configuration is devised and adopted.

[0037] Generally, in the working machine in the present embodiment, when the trigger (operation unit) 9 is operated (pulled) a plurality of times by the operator within a short time, the on-lock drive is configured by fixing the rotation speed of the motor 10 according to the pull amount during the operation.

[0038] More specifically, in the working machine according to the present embodiment, the rotation of the motor 10 can be switched between a plurality of operation modes, here two modes, namely the normal mode and the on-lock mode, under the control of the above-described control unit 100. Note that as the "plurality of operation modes", other (third and subsequent) modes may be provided, but in order to avoid an increase in the number of pages and complication of the explanation, the explanation of the third and subsequent modes is omitted.

[0039] Further, in the working machine according to the present embodiment, in the normal mode, the control unit 100 controls to drive the motor 10 while the trigger (operation unit) 9 is located in the on-region, and stops the drive of the motor 10 while the trigger 9 is located in the off-region.

[0040] More specifically, in the normal mode, the control unit 100 controls the rotation speed of the motor 10 according to the moving amount of the above-described trigger switch 9A that operates integrally with the trigger (operation unit) 9. Since the operation mode of the motor 10 is the same as the conventional one, further detailed explanation is omitted.

[0041] Next, with reference to FIG. 5, the operations in the normal mode and the on-lock mode and the transition between these modes will be described.

[0042] FIG. 5 is a diagram for outlining the operations in the normal mode and the on-lock mode of the working machine according to the present embodiment and the state transition between these modes.

[0043] First, the normal mode will be described. In the following description, the "initial state" of the trigger 9 refers to a state where the pulling amount of the trigger 9 (operation unit) is zero.

[0044] When the trigger 9 is pulled by an arbitrary pulling amount by the operator from the initial state (refer to "stop" in FIG. 5) (appropriately refer to [Trigger Keep] in FIG. 5), the control unit 100 shifts (or maintains) the mode of the working machine to the normal mode.

[0045] In such a normal mode, the motor 10 is driven according to the amount of pulling of the trigger 9 under the control of the control unit 100. Generally, in the normal mode, as the amount of pulling of the trigger 9 increases, the amount of electric power supplied to the motor 10 increases, the motor 10 rotates at a high speed, and the air volume increases. Conversely, as the amount of pulling of the trigger 9 decreases, the electric power supplied to the motor 10 decreases, the rotation speed of the motor 10 decreases, and the air volume decreases.

[0046] Next, when the trigger 9 returns from such a normal mode to the initial state (pulling amount zero), the electric power supplied to the motor 10 becomes zero under the control of the control unit 100, and the motor 10 stops. However, actually, since the motor 10 tries to continue rotating due to inertia, the motor 10 may not stop at the time of "stop" in FIG. 5. For this reason, the state of "stop" in FIG. 5 may be referred to as the "stop mode".

[0047] (Overview of the on-lock mode) Next, the on-lock mode will be described. In the present embodiment, when an operator quickly pulls (pushes in) the trigger 9 twice in the above-described stop mode (refer to "stop" in FIG. 5 as appropriate), a transition (state transition) from the stop mode to the on-lock mode is performed under the control of the control unit 100.

[0048] Here, the on-lock mode is generally a mode in which the amount of electric power supplied to the motor 10 is fixed. In other words, the on-lock mode is a mode in which the air blows because the amount of electric power supplied to the motor 10 is fixed even when the trigger 9 returns to the initial state (pulling amount zero) due to the release of the pressure on the trigger 9 by the operator.

[0049] In the present embodiment, the on-lock mode is roughly classified into two types: (1) a "weak on-lock drive state" in which the amount of electric power supplied to the motor 10 is small, and (2) a "strong on-lock drive state" in which the amount of electric power supplied to the motor 10 is larger than that in (1).

[0050] Note that the on-lock mode is not limited to the above two modes. For example, it may be configured to have a "medium on-lock driving state" where the amount of power supplied to the motor 10 is medium, or it may be configured to further subdivide the driving state into more stages (such as (4), (5),...). On the other hand, since such a subdivided configuration becomes complicated when described in detail, the description is omitted in order to simplify it as much as possible. The following explains the on-lock mode by narrowing it down to two states: (1) a weak on-lock driving state and (2) a strong on-lock driving state.

[0051] In the present embodiment, when an operation is performed in which the trigger 9 is quickly pulled (pushed in) twice, if the amount of pull of the trigger 9 exceeds the threshold both times (refer to "strong pull" in FIG. 5 as appropriate), it shifts to the strong on-lock driving state. In the strong on-lock driving state in the on-lock mode, since the amount of power supplied to the motor 10 is more than that in (1) above, stronger air (wind) is discharged (blown out) from the tip of the main nozzle 6.

[0052] On the other hand, when an operation is performed in which the trigger 9 is quickly pulled (pushed in) twice, if the amount of pull of the trigger 9 is below the threshold even once (refer to "weak pull" in FIG. 5 as appropriate), it shifts to the weak on-lock driving state. In the weak on-lock driving state in the on-lock mode, since the amount of power supplied to the motor 10 is less than that in (2) above, weaker wind is blown out.

[0053] Note that as a modification, a configuration may be adopted in which the weak on-lock driving state and the strong on-lock driving state are switched using the total value (or in other words, the average value) of the amount of pull for the two pulls of the trigger 9 as the threshold.

[0054] Also, for the sake of clarity, when expressed metaphorically, this operation can be said to correspond to a double-click operation of a mouse. Therefore, hereinafter, this operation may be conveniently referred to as a "double-click".

[0055] Next, with reference to FIG. 6, the relationship between the amount of depression of the trigger 9 and the rotational speed of the motor 10 will be described. FIG. 6 is a time chart for comparatively explaining the relationship between the duty ratio and the motor rotational speed with respect to the amount of depression of the trigger.

[0056] The graphs shown side by side in three rows in FIG. 6 are timing charts for comparatively showing the values of the amount of depression of the trigger 9 (hereinafter, may be simply abbreviated as the amount of depression), the DUTY ratio, and the motor rotational speed, respectively, from top to bottom. The horizontal axis of the graph indicates the time axis. Note that the range where the amount of depression of the trigger 9 is 0 or more and less than the contact ON corresponds to the off region of the operation unit, and the range where the amount of depression of the trigger 9 is equal to or more than the contact ON and less than or equal to the full depression corresponds to the on region of the operation unit.

[0057] Referring to FIG. 6, in the initial state after the main power supply is turned on (the time t0 at the left end in each graph), the values of the amount of depression, the DUTY ratio, and the motor rotational speed all indicate zero.

[0058] Thereafter, when the trigger 9 is pulled from the initial position starting from the time t1, after a pulling margin, the contact of the trigger switch 9A becomes ON (refer to "contact ON" in the graph of the amount of depression at the times t2), and at this timing, the DUTY ratio rises to 6%. In this state where the DUTY ratio is 6%, the motor rotational speed rises to about 30,000 (rpm) in this example (refer to the graph of the rotational speed at the time t3).

[0059] Thereafter, when the amount of depression of the trigger 9 further increases, the speed adjustment of the motor 10 is started (refer to the value of "starting speed adjustment" in the figure), the DUTY ratio rises from 6%, and along with such an increase, the rotational speed of the motor 10 further increases (refer to the values of each graph in the period from the time t3 to the time t4 as appropriate). Here, when the DUTY ratio rises from 6% to 100%, the rotational speed of the motor 10 rises to the maximum speed (about 80,000 revolutions in this example) (refer to the graph of the rotational speed at the time t4).

[0060] In the normal mode, within the range where the pulling amount of the trigger 9 reaches from the amount corresponding to the maximum speed adjustment to the full pulling amount, the DUTY ratio remains 100%, and the rotational speed of the motor 10 also remains at the maximum speed (about 80,000 revolutions per minute).

[0061] After that, when the pulling amount of the trigger 9 gradually decreases from the full pulling amount, similar to the above, until the pulling amount corresponding to the maximum speed adjustment is reached, the rotational speed of the motor 10 remains at the maximum speed (about 80,000 revolutions per minute) (refer to the values of each graph at time t5 as appropriate).

[0062] Also, when the pulling amount of the trigger 9 further decreases from the amount corresponding to the maximum speed adjustment, the DUTY ratio and the rotational speed of the motor 10 also decrease with the decrease in such pulling amount (refer to the values of each graph during the period from time t5 to time t6 as appropriate).

[0063] 〔Transition to the on-lock mode〕 Next, the states of the pulling amount, DUTY ratio, and motor rotational speed when transitioning to the on-lock mode will be described.

[0064] <Transition to the weak mode> As can be seen by referring to the left and right centers (time t8 to time t11) of each graph shown in FIG. 6, when the trigger 9 is pulled twice within a predetermined threshold time (200 milliseconds (ms) in this example) (when double-clicked), the waveform of the DUTY ratio also rises twice. Note that the operation of the motor 10 for the two rises of the DUTY ratio waveform rotates slightly respectively, as shown in the "rotational speed" graph.

[0065] At this time, if even one of the two pulling operations of the trigger 9 exceeds the threshold TH shown in FIG. 6 (95% of the pulling amount of the maximum speed adjustment in this example), the transition process to the weak mode is performed.

[0066] More specifically, when the second pulling operation of the trigger 9 ends, that is, when the contact of the trigger switch 9A turns OFF, the transition to the weak mode is started, and the motor 10 is held at a low speed (about 30,000 revolutions in this example) so as to be in an on-lock state (refer to times t11 to t12). In this on-lock state in the weak mode, as can be seen from the graph shown in the middle of FIG. 6, the duty ratio is held at about 6%. The rotational speed of the motor 10 at low speed (about 30,000 revolutions in this example) corresponds to the second rotational speed.

[0067] <Transition to the strong mode> As can be understood by referring to times t12 to t15 of each graph shown in FIG. 6, in the same manner as described above, when the trigger 9 is pulled twice within a predetermined time (200 ms) and both of the two pulling operations exceed the threshold TH (pulling amount of 95% of the maximum speed regulation), the transition process to the strong mode is performed.

[0068] More specifically, as can be understood by referring to the graph of "rotational speed" at times t12 to t15, from the on-lock state (period B) to the operation where the trigger 9 is pulled twice, from the first time (time t12) to the completion of the second time (time t15), it is in the normal state. Then, when the second pulling operation of the trigger 9 ends (when the contact of the trigger switch 9A turns OFF), the transition to the strong mode is started, and the motor 10 is held at a high speed (about 80,000 revolutions in this example) so as to be in an on-lock state (refer to times t15 to t16). In this on-lock state in the strong mode, as can be seen from the graph shown in the middle of FIG. 6, the duty ratio is held at substantially 100%. The rotational speed of the motor 10 at high speed (about 80,000 revolutions in this example) corresponds to the first rotational speed.

[0069] <Return to the normal mode> In the example shown in FIG. 6, as shown at time t16, when the trigger 9 is pulled so that the contact of the trigger switch 9A turns ON during the above-described on-lock state, the normal mode is restored (see period E). In this example, at time t17, the trigger 9 returns to the initial state (the duty ratio and the rotational speed are 6% and 30,000 rpm, respectively), and at time t18, the motor 10 has stopped.

[0070] As described in detail above, the working machine (the blower 1) of the present embodiment includes the motor 10, the operation unit 9 that can be moved from the initial position by the operation of the operator, and the control unit 100 that controls the driving of the motor 10 according to the operation state with respect to the operation unit 9 and can detect the position of the operation unit 9. And the control unit 100 performs control to switch to a plurality of operation modes including the normal mode and the on-lock mode. Specifically, in the normal mode, the control unit 100 drives the motor 10 while the operation unit 9 is located in the on region, and stops the driving of the motor 10 while the operation unit 9 is located in the off region. Further, in the on-lock mode, the control unit 100 drives the motor 10 regardless of the position of the operation unit 9. Furthermore, when the control unit 100 performs a switching operation including the operation unit 9 being located in the on region a plurality of times in the normal mode, the control unit 100 switches to the on-lock mode, and in the on-lock mode, the control unit 100 controls the operation of the motor 10 so as to fixedly set the rotational speed of the motor 10 according to the amount of movement of the operation unit 9 from the initial position in the switching operation.

[0071] According to the working machine of the present embodiment having such a configuration, workability can be improved.

[0072] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist thereof.

[0073] <Modification example> In the above-described embodiment, the case where the threshold value (the first threshold value) TH of the pulling amount is 95% of the maximum speed regulation of the trigger (operation unit) 9 has been described. The value of the threshold value TH is not limited to this, and can be set to any value in the range of 60% to 100% of the maximum speed regulation.

[0074] In addition, in the above-described embodiment, the case where the time threshold is 200 ms has been described. The time threshold is not limited thereto and can be set to any value in the range of 60 ms to 2000 ms.

Explanation of Reference Numerals

[0075] 1... blower (working machine), 2... housing part, 3... motor case (first housing part), 4... handle part, 5... battery mounting part (second housing part), 6... main nozzle (nozzle part), 6a... tip side part (one end side part, first housing part side end), 6b... base end side part (the other end side part, second housing part side end), 6c... outer peripheral part, 6d... air inlet, 6e... air outlet, 6f... convex part, 7... battery pack, 8... control board, 9... trigger (operation part), 9A... trigger switch, 10... motor, 10a... fan, 10b... stator, 10c... rotor, 10d... inner wall, 10e... motor substrate, 11... intake part, 11a... mesh part, 12... exhaust part, 12a... groove part, 13... upper holding part (first holding part, holding part), 13a... first groove part, 13b... second groove part, 14... lower holding part (second holding part, holding part), 14a... protruding part, 15... protruding part, 16... sub-nozzle (nozzle part), 17... LED, 18... accommodation space, 19... operation space, 30... motor output part, 31... motor control base, 80... board unit, 81... rotation speed detection circuit, 82... control signal output circuit, 83... current detection circuit, 84... power switch circuit, 85... power supply circuit, 86... trigger switch detection circuit, 87... trigger switch operation amount detection part, 88, 89... connector, 100... control part, C1... axial direction, D1, D2... diameter, E1... extending direction, F1... air flow, G1, G2... diameter, L1... length of handle part, L2... length of handle part + trigger, L3, L4, L5... distance

Claims

1. A motor, an operation unit movable from an initial position by an operator's operation, and a control unit configured to control driving of the motor according to an operation state of the operation unit and to be able to detect a position of the operation unit, wherein the control unit is switchable between a plurality of operation modes including a normal mode and an on-lock mode, and the control unit in the normal mode, drives the motor while the operation unit is located in an on-region and stops driving of the motor while the operation unit is located in an off-region, in the on-lock mode, drives the motor regardless of the position of the operation unit, and when a switching operation including the operation unit being located in the on-region a plurality of times occurs in the normal mode, the control unit switches the operation mode to the on-lock mode, and in the on-lock mode, sets a rotation speed of the motor according to a movement amount of the operation unit from the initial position in the switching operation, a working machine.

2. The switching operation is a reciprocating operation in which the operation unit moves from the on-region to the off-region and then again to the on-region and then again to the off-region. The working machine according to claim 1.

3. In the on-lock mode, the control unit controls driving of the motor at a first rotation speed and a second rotation speed lower than the first rotation speed, and when, in the switching operation, the maximum value of the movement amount of the operation unit from the initial position exceeds a first threshold value in all cases where the operation unit is located in the on-region a plurality of times, the control unit drives the motor at the first rotation speed. The working machine according to claim 1.

4. In the on-lock mode, when the operation unit moves from the off-region to the on-region, the control unit controls driving of the motor so as to switch to the normal mode. The working machine according to claim 1.

5. The plurality of times is two times. The working machine according to claim 1.

6. The first threshold value is set in a range of 60% to 100% of the maximum speed regulation of the operation unit. The working machine according to claim 3.

7. When, in the two reciprocating operations, the time of each reciprocating operation is in a range of 60 ms to 300 ms, the control unit performs a process of shifting to the on-lock mode. The working machine according to claim 5.

8. a fan driven by the driving force of the motor, A housing that houses the motor and the fan and has an intake port that serves as an inlet for the air flow by the fan and an exhaust port that serves as an outlet; A nozzle that is detachably attached to the exhaust port; and The working machine according to claim 1.

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