CN216017927U

CN216017927U - Electric tool

Info

Publication number: CN216017927U
Application number: CN202122369285.4U
Authority: CN
Inventors: 金艳
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-03-15
Anticipated expiration: 2031-09-28

Abstract

The utility model relates to an electric tool which comprises a shell, a motor contained in the shell, an operating unit for controlling the starting and stopping of the motor and a control unit connected with the operating unit. The electric tool has an activated state and a deactivated state, and when the electric tool is in the activated state, the control unit is operated, and the motor normally runs; in the disabled state, the operating unit is operated and the motor is not operated. The electric tool comprises a detection unit connected with the control unit, the detection unit comprises a plurality of sensors arranged on the holding part, and when at least two of the plurality of sensors are triggered, the control unit switches the control unit from the disabled state to the activated state. According to the utility model, the detection unit is arranged on the holding part of the shell, the detection unit detects the holding state of the operator, and the electric tool can be activated only when the operator triggers the at least two sensors of the detection unit, so that the safety performance of the electric tool is greatly improved, and the injury to the operator caused by misoperation is effectively avoided.

Description

Electric tool

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electric tool, in particular to an electric tool used in occasions such as garden pruning and the like.

[ background of the utility model ]

The electric pruning shears are tools with front end cutter heads driven by the motor to open and close in a reciprocating mode and are widely applied to pruning operation of branches, traditional manual operation is replaced by the electric pruning shears, time and labor are saved, and work efficiency of users is greatly improved. The motor of the existing electric pruning shears is directly triggered by the control unit and controls the start and stop, and an operator can start the motor by pressing the control unit so as to drive the blade to carry out shearing action. However, in some emergency situations, the operator may accidentally trigger the operating unit of the electric pruning shears, so that the blade may perform the shearing action, which may easily cause accidental injury to the operator.

An improvement to the above problem can be found in chinese utility model patent No. 200920283619.2, published on 09/01/2010, which discloses an electric scissors with a double-action switch, comprising a housing, and a main trigger and a locking trigger arranged on the same side of the housing, wherein when the locking switch is placed at a first position, the main trigger is engaged with the locking trigger to prevent the main trigger from being pressed. Compared with the traditional pruning shears, the pruning shears are additionally provided with the locking trigger, so that the condition of false triggering is prevented; however, since a mechanical switch needs to be added to the housing, the size is not favorable for miniaturization; and when an operator holds the pruning shears to work for a long time and approaches or touches other objects except branches, the main trigger can not be responded in time because the fingers repeatedly hook the main trigger all the time, and the possibility of accidental injury still exists.

Accordingly, there is a need for an improved power tool that overcomes the deficiencies of the prior art.

[ Utility model ] content

In view of the defects of the prior art, the utility model aims to provide an electric tool which is high in safety and convenient to use.

The utility model solves the problems of the prior art by adopting the following technical scheme: an electric tool comprises a shell, a motor contained in the shell, a control unit for controlling the start and stop of the motor and a control unit connected with the control unit, wherein the shell comprises a holding part for an operator to hold, and the control unit is arranged adjacent to the holding part; the electric tool has an activated state and a deactivated state, the electric tool is in the activated state, and when an operator manipulates the manipulation unit, the motor operates normally; the electric tool is in the disabled state and the motor is not operated when the operator manipulates the manipulation unit; the electric tool comprises a detection unit connected to the control unit, the detection unit comprises a plurality of sensors arranged on the holding part, and when at least two of the plurality of sensors are triggered, the control unit switches the electric tool from the disabled state to the activated state.

The further improvement scheme is as follows: the power tool is in a disabled state when only zero or one of the plurality of sensors is triggered.

The further improvement scheme is as follows: the sensors are distributed on the outer surface of the holding part at intervals, and the sensors and the control unit are located in different planes of the holding part.

The further improvement scheme is as follows: when the operator grips the holding part, the operator can operate the operating unit and trigger at least two of the sensors.

The further improvement scheme is as follows: the control unit comprises a control unit and an operating element, wherein the control unit is arranged on the shell, the operating element is electrically connected with the control unit, the operating element controls the starting and stopping of the electric switch, and a starting and stopping signal is sent to the control unit.

The further improvement scheme is as follows: the detecting unit comprises an indicating element arranged on the shell, the indicating element is electrically connected to the control unit, when at least two of the sensors are triggered, the detecting unit is in a triggered state, and the control unit activates the indicating element.

The further improvement scheme is as follows: the detecting unit further comprises a plurality of indicator lights disposed on the housing, the plurality of indicator lights are respectively and correspondingly electrically connected to the plurality of sensors, and when each of the plurality of sensors is triggered, a corresponding one of the plurality of indicator lights is turned on.

The further improvement scheme is as follows: the sensor is a capacitance sensor arranged on the holding part, the capacitance sensor is electrically connected to the control unit, and when an operator grips the holding part, the capacitance sensor is triggered to send a high-level signal to the control unit.

The further improvement scheme is as follows: the sensor is an infrared sensor arranged on the holding part, when an operator grips the holding part, the infrared sensor detects infrared light waves emitted by the operator, and the infrared sensor sends a high-level signal to the control unit.

Compared with the prior art, the utility model has the following beneficial effects: the detection unit is arranged on the holding part of the shell and used for detecting the holding state of an operator, and the electric tool can be activated only when the operator triggers the at least two sensors of the detection unit, so that the safety performance of the electric tool is greatly improved, and the injury to the operator caused by misoperation is effectively avoided; furthermore, the indicating element is electrically connected with the control unit, and after the detecting unit is triggered, the control unit activates the indicating element to remind an operator that the current holding state triggers the electric tool, so that the human-machine engineering experience is good; in addition, a plurality of indicator lamps are arranged corresponding to a plurality of sensors of the detection unit, and an operator can adjust to a proper holding posture by lighting on/off of the indicator lamps.

[ description of the drawings ]

The following detailed description of embodiments of the utility model is provided in conjunction with the appended drawings:

FIG. 1 is a schematic structural view of a power tool according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of the power tool of FIG. 1 with the housing removed;

FIG. 3 is an exploded schematic view of the power tool of FIG. 1;

fig. 4 is a schematic circuit diagram of a control unit of the electric power tool shown in fig. 1.

The meaning of the reference symbols in the figures:

100. the electric tool 1, the shell 11, the main body part 12, the holding part 2, the motor 3, the operating unit 31, the operating element 32, the electric switch 4, the control unit 41, the auxiliary electric control board 42, the main control board 5, the detecting unit 51, the indicating element 52, the sensor 53, the indicating lamp 6, the transmission device 61, the reduction box component 62, the sector gear transmission device 63, the magnet 7, the shearing device 71, the metal fixing part 72, the static blade 73 and the movable blade

[ detailed description ] embodiments

The present invention will be described in further detail with reference to the accompanying drawings and embodiments.

Referring to fig. 1 and 2, an embodiment of the present invention relates to an electric tool 100, and preferably, the electric tool 100 is a pruning shear widely used in the field of garden pruning and the like. The electric tool 100 comprises a housing 1, a motor 2 mounted in the housing 1, a transmission 6 and a shearing device 7. The housing 1 has a main body portion 11 and a grip portion 12, and the motor 2 is accommodated in the grip portion 12.

Referring to fig. 3, one end of the motor 2 is connected to the transmission device 6, and the transmission device 6 includes a reduction box assembly 61 accommodated in the main body 11 and a sector gear transmission device 62 connected to the reduction box assembly 61. In the present embodiment, the motor 2 is a dc brushless motor, the motor 2 is located at the rear end of the transmission device 6, and a pinion at the front end of the output shaft of the motor 2 is engaged with a gear in the reduction box assembly 61.

The shearing device 7 comprises a fixed blade 72 fixedly connected with the shell 1, a movable blade 73 pivotally connected with the fixed blade 72, and a metal fixing piece 71 for fixing the fixed blade 72 and the movable blade 73. The shearing device 7 is positioned at the front end of the shell 1 and is connected to the sector gear transmission device 62. The motor 2 drives the shearing device 7 through the transmission device 6 to perform shearing operation. Specifically, the rear end of the movable blade 73 is connected with the sector gear transmission device 62, and the sector gear transmission device 62 drives the movable blade 73 to do reciprocating swing motion under the driving of the motor 2, so as to open and close the movable blade 73 and the fixed blade 72.

Referring to fig. 4, the power tool 100 further includes a control unit 3 for controlling the start and stop of the motor 2, and a control unit 4 connected to the control unit 3. The manipulation unit 3 is disposed adjacent to the grip portion 12, so that an operator can manipulate the manipulation unit 3 to control the rotation of the motor 2.

The control unit 4 includes a main control board 42 located at the rear end of the motor 2 and an auxiliary electric control board 41 electrically connected to the main control board 42. The main control board 42 and the auxiliary electric control board 41 are connected by a wire. The manipulation unit 3 includes a manipulation element 31 mounted to the case 1 and an electric switch 32 electrically connected to the auxiliary electric control board 41, and the manipulation element 31 controls the electric switch 32 and transmits a signal to the control unit 4.

Specifically, the operating switch 31 is a trigger, and the operating switch 31 is located at the lower end of the housing 1, so that when an operator holds the holding portion 12, the operator can conveniently hook the operating switch 31, and the operation is comfortable. The electric switch 32 includes a magnetic element embedded in the operating switch 31 and a status hall sensor disposed on the auxiliary electric control board 41, and the magnetic element is disposed adjacent to the auxiliary electric control board 41. The state hall sensor is used for detecting the state of the operating switch 31 and sending a corresponding signal to the control unit 4 so as to control the forward and reverse rotation of the motor 2.

As shown in fig. 3, the electric power tool 100 further includes an auxiliary electric control board 41 disposed adjacent to the sector gear 62 and a magnet 63 fixedly mounted to the sector gear 62. The magnet 63 is embedded in the sector gear 62 and moves synchronously with the sector gear 62. Furthermore, two limiting hall sensors for sensing the position of the magnet 63 are arranged on the auxiliary electric control board 41, and the limiting hall sensors are distributed at two ends of the auxiliary electric control board 41. When the magnet 63 swings to any hall element position along with the sector gear 62, the movable blade 73 reaches an opening or closing limit position, that is, the movable blade 73 and the fixed blade 72 open to a maximum angle θ or close to a minimum angle zero. The position arrangement of the limiting Hall sensors determines the maximum opening angle of the shearing device 7, namely the diameter of the branch can be sheared.

In the present embodiment, the pruning shears 100 has an activated state and a deactivated state, and in the activated state, the control unit 3 is operated, and the motor 2 operates normally; in the disabled state, the operating unit 3 is operated and the motor 2 is not operated. The control unit 4 controls the state of the pruning shears 100, and limits the activation of the motor 2, so that the operator is prevented from randomly hooking the operating switch 31 to cause personal accidents.

As shown in fig. 4, the power tool 100 further includes a detecting unit 5, and the detecting unit 5 includes an indicating element 51 disposed on the housing 1, a plurality of sensors 52 disposed on the holding portion 12, and a plurality of indicating lights 53 disposed on the housing 1. The plurality of sensors 52 are distributed at intervals on the outer surface of the grip portion 12, and the plurality of sensors 52 and the manipulating unit 3 are located in different planes of the grip portion 12. When the operator grips the grip portion 12, the manipulation unit 3 can be manipulated simultaneously and at least two of the plurality of sensors 52 are activated.

Further, when at least two of the plurality of sensors 52 are triggered, the control unit 4 switches the pruning shears 100 from the disabled state to the enabled state. When zero or one of the plurality of sensors 52 is triggered, the operating unit 3 is still in the disabled state. The detection unit 5 and the operation unit 3 form a double switch, so that accidental loss caused by improper operation is effectively avoided. If something other than branches is cut, the fingers cannot timely release the operating switch 31 forward in a state of high mental stress during the continuous work of the operator, the palm can subconsciously release the holding part 12, at this time, the sensor 52 detects that the operator is far away from the holding part 12, and the control unit 4 controls the motor 2 to stop running.

Specifically, during use, an operator holds the pruning shears 100, and when the detection unit 5 is triggered, the electric tool 100 is switched to the activated state. The control switch 31 is hooked, the electric switch 32 detects that the control switch 31 is hooked, a high level signal is sent to the control unit 4, the control unit 4 controls the motor 2 to rotate forwards to drive the transmission device 6 to move, and when one of the limit hall sensors detects the magnet 63, the motor 2 stops operating. When the operating switch 31 is released, the electric switch 32 sends a low level signal to the control unit 4, and controls the motor 2 to rotate reversely until the other limit hall sensor detects the magnet 63, so as to complete the movement of the pruning shears 100 from the open position to the closed position and then back to the open position.

Preferably, the indication element 51 is a light emitting element electrically connected to the control unit 4, and when the detection unit 5 is in a triggered state, the control unit 4 lights the light emitting element. The light-emitting element is used for reminding an operator that the operator is in a correct holding state and can operate. Other indication means, such as voice prompt, buzzer, etc., may be used instead of the light emitting element.

In the present embodiment, the plurality of indicator lights 53 are electrically connected to the plurality of sensors 52, respectively, when each of the plurality of sensors 52 is triggered, each corresponding indicator light 53 is turned on, and when the detecting unit 5 is in an activated state, at least two indicator lights 53 are in a turned-on state. The plurality of indicator lights 53 correspond to the plurality of sensors 52, and indicate the holding posture of the operator, and when the operator holds the grip portion 12 with his palm and grips the fingers with his/her palm, the plurality of indicator lights 53 are simultaneously turned on. At this time, the user is comfortable and safe in the optimum grip posture.

In the present embodiment, the sensor 52 may be a capacitive sensor disposed on the grip portion 12, the capacitive sensor is electrically connected to the control unit 4, when the operator grips the grip portion 12, the capacitive sensor is triggered, the capacitive sensor sends a high level signal to the control unit 4, and the control unit 4 switches the pruning shears 100 from the disabled state to the activated state.

Furthermore, the sensor 52 may be an infrared sensor disposed on the grip portion 12, which detects infrared light waves emitted by an operator when the operator grips the grip portion 12, and sends a high-level signal to the control unit 4, and the control unit 4 switches the pruning shears 100 from the disabled state to the activated state.

According to the utility model, the detection unit 5 is arranged on the holding part 12 of the shell, and the detection unit 5 detects the holding state of an operator, so that the situations of misoperation and the like are effectively avoided; furthermore, the indicating element 51 is electrically connected with the control unit 4, and after the detection unit 5 is triggered, the control unit 4 lights an indicating lamp to remind an operator that the current holding state is good, and the human-machine engineering is friendly; in addition, a plurality of indicator lights 53 are provided corresponding to the plurality of sensors 52 of the detection unit 5, and the holding posture of the operator is adjusted by turning on/off the indicator lights 53, so that the most labor-saving state is achieved.

The present invention is not limited to the above-described embodiments. It will be readily appreciated by those skilled in the art that many other alternatives to the power tool of the present invention are possible without departing from the spirit and scope of the utility model. The protection scope of the present invention is subject to the content of the claims.

Claims

1. An electric tool comprises a shell, a motor contained in the shell, a control unit for controlling the start and stop of the motor and a control unit connected with the control unit, wherein the shell comprises a holding part for an operator to hold, and the control unit is arranged adjacent to the holding part; the method is characterized in that: the electric tool has an activated state and a deactivated state, the electric tool is in the activated state, and when an operator manipulates the manipulation unit, the motor operates normally; the electric tool is in the disabled state and the motor is not operated when the operator manipulates the manipulation unit; the electric tool comprises a detection unit connected to the control unit, the detection unit comprises a plurality of sensors arranged on the holding part, and when at least two of the plurality of sensors are triggered, the control unit switches the electric tool from the disabled state to the activated state.

2. The power tool of claim 1, wherein: the power tool is in a disabled state when only zero or one of the plurality of sensors is triggered.

3. The power tool of claim 1, wherein: the sensors are distributed on the outer surface of the holding part at intervals, and the sensors and the control unit are located in different planes of the holding part.

4. The power tool of claim 3, wherein: when the operator grips the holding part, the operator can operate the operating unit and trigger at least two of the sensors.

5. The power tool of claim 1, wherein: the control unit comprises a control unit and an operating element, wherein the control unit is arranged on the shell, the operating element is electrically connected with the control unit, the operating element controls the starting and stopping of the electric switch, and a starting and stopping signal is sent to the control unit.

6. The power tool of claim 1, wherein: the detecting unit comprises an indicating element arranged on the shell, the indicating element is electrically connected to the control unit, when at least two of the sensors are triggered, the detecting unit is in a triggered state, and the control unit activates the indicating element.

7. The power tool of claim 6, wherein: the detecting unit further comprises a plurality of indicator lights disposed on the housing, the plurality of indicator lights are respectively and correspondingly electrically connected to the plurality of sensors, and when each of the plurality of sensors is triggered, a corresponding one of the plurality of indicator lights is turned on.

8. The power tool of claim 2, wherein: the sensor is a capacitance sensor arranged on the holding part, the capacitance sensor is electrically connected to the control unit, and when an operator grips the holding part, the capacitance sensor is triggered to send a high-level signal to the control unit.

9. The power tool of claim 2, wherein: the sensor is an infrared sensor arranged on the holding part, when an operator grips the holding part, the infrared sensor detects infrared light waves emitted by the operator, and the infrared sensor sends a high-level signal to the control unit.