Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention proposes that one kind is cutCareless machine, the grass trimmer have the advantages that work efficiency is high, operation is smooth.
Grass trimmer according to an embodiment of the present invention, comprising: fuselage；Moving assembly, the moving assembly include described in driveThe mobile traveling wheel of fuselage and the pivotal axis for being sheathed on the traveling wheel；Control circuit is installed on the fuselage, for handling letterNumber；Sensor, for perceiving environmental information, the sensor is installed on the moving assembly, the sensor and the controlCircuit electrical connection.
Grass trimmer according to an embodiment of the present invention not only facilitates sensor by being arranged sensor on moving assemblyInstallation and connection, can also avoid in the related technology due to sensor be set to grass trimmer fuselage bottom, grass trimmer is in fuselageBottom is configured to convex so that sensor influence grass trimmer entirely through property, and then can be to avoid rough road surfaceInterference to sensor improves the runnability of grass trimmer, additionally it is possible to enable the sensor to fully Biophytum nanum H. Chuang sp. Nov. Ined.-B. Sensitivum auct. Non (L.) DC so as to cutCareless machine cut grass is more abundant.
According to some embodiments of the present invention, the sensor includes capacitance sensor, for perceiving whether have grass.
According to some embodiments of the present invention, the grass trimmer further include: connection component, the connection component and the biographySensor electrical connection, the connection component are electrically connected to the control circuit.
In some embodiments of the invention, the connection component includes conductive resilient element, and the of the conductive resilient elementOne end is supported with the moving assembly and/or the sensor, the second end of the conductive resilient element and control circuit electricityConnection.
In further embodiment of the present invention, the fuselage further includes support portion, for fixing the conductive resilient elementSecond end.
Further, the sensor sleeve is set to the pivotal axis, and the pivotal axis is conductive material.
Further, the moving assembly further includes conducting connecting bar, and the conducting connecting bar is axial from the pivotThe fuselage extends, for connecting the traveling wheel and the fuselage.
In some examples of the invention, the conductive resilient element includes conductive torsional spring, the first end of the conduction torsional springIt is supported with the conducting connecting bar, the second end of the conduction torsional spring is fixed on the support portion.
In some examples of the invention, the conducting connecting bar is pivotable relative to the fuselage, the conductive connectionThe pivot axis of bar is vertical with the extending direction of the pivotal axis.
Further, on conducting connecting bar pivot axis direction, the conducting connecting bar is relative to the fuselageIt is removable.
In some embodiments of the invention, in a ring, the sensor is installed in the traveling wheel sensorSide.
Further, the conductive resilient element includes electroconductive elastic sheet, the first end of the electroconductive elastic sheet and the sensorIt supports, the second end of the electroconductive elastic sheet is fixed on the support portion.
Some examples according to the present invention, the traveling wheel is driving wheel or driven wheel.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following descriptionObviously, or practice through the invention is recognized.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to endSame or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attachedThe embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "front", "rear", " left side ",The orientation or position of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside", " axial direction ", " radial direction ", " circumferential direction "Relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, without referring toShow or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot manageSolution is limitation of the present invention.In addition, define " first ", the feature of " second " can explicitly or implicitly include one orMore this feature of person.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phaseEven ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It canTo be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediaryConnection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete conditionConcrete meaning in invention.
As Figure 1-Figure 8, grass trimmer 1 according to an embodiment of the present invention, including fuselage 10, moving assembly 20, control electricityRoad 30 and sensor 50.
Specifically, as Figure 1-Figure 5, moving assembly 20 includes traveling wheel 200 and pivotal axis 210, and traveling wheel 200 canTo drive fuselage 10 mobile, pivotal axis 210 is sheathed on traveling wheel 200.For example, pivotal axis 210 can be threaded through traveling wheel 200On, it can be rotated by driving pivotal axis 210, so that 200 rotation of traveling wheel is driven, when traveling wheel 200 is relative to ground rotationWhen, fuselage 10 can be driven to travel on the ground.Control circuit 30 is installed on fuselage 10, and control circuit 30 is for handling signal.Sensor 50 is for perceiving environmental information, and sensor 50 is installed on moving assembly 20, and sensor 50 is electrically connected with control circuit 30.It is understood that sensor 50 can be with the environmental information around real-time detection grass trimmer 1, sensor 50 and control circuit 30 canRealize that information is transmitted in a manner of through electrical connection, the environmental information that sensor 50 can also will test passes to control circuit30, control circuit 30 can analyze the environmental information received.It should be noted that " connection " mentioned herein can be directlyIt connects or is indirectly connected in succession.
Grass trimmer according to an embodiment of the present invention not only facilitates biography by being arranged sensor 50 on moving assembly 20The installation and connection of sensor 50 can also avoid in the related technology since sensor is set to the fuselage bottom of grass trimmer, grass trimmerBe configured to convex in fuselage bottom so that sensor influence grass trimmer entirely through property the case where, and then can be to avoid recessedInterference of the road surface of convex injustice to sensor, improves the runnability of grass trimmer 1, additionally it is possible to enable sensor 50 abundantGround Biophytum nanum H. Chuang sp. Nov. Ined.-B. Sensitivum auct. Non (L.) DC is so that the mowing of grass trimmer 1 is more abundant.
According to some embodiments of the present invention, sensor 50 includes capacitance sensor, for perceiving whether have grass.Capacitor passesSensor refers to a kind of sensor that the variation for being measured (such as size, pressure) is converted into electric capacitance change.It is understood thatBeing is capacitance sensor there are the type of a sensor 50, which can be used for detecting on ground, grass trimmer 1Whether the region being located at has grass.It should be noted that sensor 50 can also be other types of sensor, such as photoelectric transferSensor.Photoelectric sensor is using sensor of the photoelectric cell as detecting element.It is first converted into measured variationThe variation of optical signal, then further converts optical signals into electric signal by photoelectric cell.Photoelectric sensor generally by light source,Optical path and photoelectric cell three parts composition.Capacitance sensor is relatively common and at low cost with photoelectric sensor, Er Qie electricityThe detection accuracy for holding sensor and photoelectric sensor is high, high-efficient.
Further, control circuit 30 is electrically connected with moving assembly 20, and control circuit 30 receives the transmission of sensor 50After environmental information, moving assembly 20 can be controlled according to Environmental Information Feature.For example, when sensor 50 detects grass trimmer 1 weekWhen being with weeds, control circuit 30 can control moving assembly 20 and stop traveling or slowly traveling, when sensor 50 detectsWhen not having weeds around grass trimmer 1, control circuit 30 can control the traveling of moving assembly 20 and travel speed.It needs to illustrateIt is that " electrical connection " mentioned herein can be direct electrical connection, is also possible to be electrically connected indirectly.
Further, grass trimmer 1 further includes cutter plate 60, and cutter plate 60 is connect with fuselage 10, at grass trimmer 1When operating status, cutter plate 60 is opposite with ground, and cutter plate 60 is electrically connected in control circuit 30, and control circuit 30 receivesAfter the environmental information transmitted to sensor 50, the working condition of cutter plate 60 can be controlled according to Environmental Information Feature.For example,When having weeds around sensor 50 detects grass trimmer 1, control circuit 30 can control the operation of cutter plate 60 and operation speedRate, when not having weeds around sensor 50 detects grass trimmer 1, control circuit 30 can control moving assembly 20 and stop fortuneRow.
According to some embodiments of the present invention, grass trimmer 1 further includes connection component, and connection component is electrically connected with sensor 50It connects, connection component is electrically connected with control circuit 30.It is understood that sensor 50 and control circuit 30 can pass through connection groupPart realizes electrical connection, and connection component can serve as the signal transduction component between control circuit 30 and sensor 50, sensor 50The signal for whether having grass that can be will test passes to connection component, the signal that connection component will can be received furtherControl circuit 30 is sent to, in order to which control circuit 30 controls the operating status of grass trimmer 1.
As Figure 1-Figure 4, in some embodiments of the invention, connection component includes conductive resilient element 400, conductive bulletThe first end of property part 400 is supported with moving assembly 20 and/or sensor 50, the second end and control circuit of conductive resilient element 40030 electrical connections.In other words, at least one of moving assembly 20 and sensor 50 and the first end of conductive resilient element 400 support.It should be noted that moving assembly 20 can be with sensor when one end of conductive resilient element 400 and moving assembly 20 often contact50 electrical connections.
It is understood that the connection type of conductive resilient element 400 can be there are many situation, one of situation is: leadingOne end of electric elastic component 400 can often be contacted with moving assembly 20, and if necessary, one end of conductive resilient element 400 can be with shiftingThere are active force between dynamic component 20, the other end of conductive resilient element 400 can be electrically connected with control circuit 30；There are also a kind of feelingsCondition is: one end of conductive resilient element 400 can often be contacted with sensor 50, and if necessary, one end of conductive resilient element 400 can be withThere are active force between sensor 50, the other end of conductive resilient element 400 can be electrically connected with control circuit 30；Another feelingsCondition is: one end of conductive resilient element 400 can often be contacted with sensor 50, moving assembly 20, if necessary, 50 He of sensorThere are active forces between at least one of moving assembly 20 and conductive resilient element 400.
Conductive resilient element 400 can serve as the signal transduction component between control circuit 30 and sensor 50 as a result, sensingWhether what device 50 can will test has the signal of grass to pass to conductive resilient element 400, and conductive resilient element 400 can be furtherThe signal received is sent to control circuit 30, in order to which control circuit 30 controls the operating status of grass trimmer 1.It needs to illustrate, the type of conductive resilient element 400 is not especially limited, as long as conduction can be played the role of and supported.
As Figure 1-Figure 4, in further embodiment of the present invention, fuselage 10 can also include support portion 100, supportPortion 100 can be used for the second end of fixed conductive resilient element 400.Thus, it is possible to which conductive resilient element 400 is passed through support portion 100It is mounted on fuselage 10.
Further, sensor 50 is sheathed on pivotal axis 210, and pivotal axis 210 is conductive material.It is understood that passingSensor 50 can be formed as ring-shaped, and pivotal axis 210 can be threaded through in the inner ring of sensor 50, and pivotal axis 210 can be madeFor conductive material (such as metalwork).
Pivotal axis 210 can be used as conducting medium as a result, and signal detected by sensor 50 is passed through pivotal axis 210It passes.Pivotal axis 210 acts not only as the mechanical structured member of grass trimmer 1 to install traveling wheel 200, and pivotal axis 210 is alsoIt can be used as conducting medium, signal detected by sensor 50 passed by pivotal axis 210, is set so as to saveIt sets for realizing the electric connecting part of sensor 50 and 30 communication connection of control circuit, setting structure is simple, and can be improved and cutThe component layouts of careless machine 1 optimize performance, reduce the cost of grass trimmer 1.
Further, as shown in Figure 1-Figure 3, moving assembly 20 can also include conducting connecting bar 220, conducting connecting bar220 extend from pivotal axis 210 to fuselage 10, for connecting traveling wheel 200 and fuselage 10.It is understood that conducting connecting bar220 one end is connect with pivotal axis 210, and the other end of conducting connecting bar 220 is connect with fuselage 10.Thus, it is possible to pass through conductionTraveling wheel 200 is connected on fuselage 10 by connecting rod 220 and pivotal axis 210.In some embodiments of the invention, it is conductively connectedBar 220 and pivotal axis 210 are integrally formed part.Thus, it is possible to improve the stable connection of conducting connecting bar 220 Yu pivotal axis 210Property.
As shown in Figure 1-Figure 3, in some examples of the invention, conductive resilient element 400 may include conductive torsional spring 420,The first end of conductive torsional spring 420 is supported with conducting connecting bar 220, and the second end of conductive torsional spring 420 is fixed on support portion 100.It canWith understanding, one end of conductive torsional spring 420 can be fixed on support portion 100, the other end of conductive torsional spring 420 can with leadThe extension bar 220 that is electrically connected often contacts.The electric signal carried on conducting connecting bar 220 as a result, can be passed out by conductive torsional spring 420It goes.Conductive torsional spring 420 is to support to contact with conducting connecting bar 220, thereby may be ensured that conducting connecting bar 220 relative to support portionIn 100 rotations or moving process, it can be contacted with conductive torsional spring 420 to realize electrical connection.
As shown in Figure 1-Figure 3, in some embodiments of the invention, conducting connecting bar 220 is pivotable relative to fuselage 10,The pivot axis 220a of conducting connecting bar 220 is vertical with the extending direction of pivotal axis 210.For example, can be equipped on fuselage 10 logicalThe one end in road 110, conducting connecting bar 220 can be protruded into channel 110, and conducting connecting bar 220 can turn in channel 110It is dynamic.The pivot axis 220a of conducting connecting bar 220 (up and down direction as shown in Figure 2) can extend along the vertical direction, traveling wheel200 pivotal axis 210 (left and right directions as shown in Figure 2) can extend in the horizontal direction.Traveling wheel 200 both can be with as a result,Conducting connecting bar 220 around vertical direction rotate, traveling wheel 200 can also with pivotal axis 210 around horizontal direction rotate,So as to realize the rotation in more than 200 a orientation of traveling wheel, and then the multi-direction movement of traveling wheel 200 may be implemented, raising is cutThe runnability of careless machine 1.
In conjunction with Fig. 1 and Fig. 3, in further embodiment of the present invention, in the pivot axis 220a of conducting connecting bar 220On direction, conducting connecting bar 220 is removable relative to fuselage 10, i.e., conducting connecting bar 220 can be shown in Fig. 1-Fig. 3 onLower section moves up.It is understood that conducting connecting bar 220 can move in the short transverse of fuselage 10, need to illustrate, " short transverse " mentioned herein can be up and down direction shown in fig. 7, so as to adjust traveling wheel 200 withThe distance between fuselage 10 realizes the adjustment of the position on fuselage 10 of traveling wheel 200.Traveling wheel 200 is adapted to difference as a result,Lawn surface can be by adjusting the position of traveling wheel 200, so that traveling wheel 200 can especially on broken terrainOften to be contacted with ground, so that sensor 50 can be accurately detected grass.
Further, as shown in Fig. 2-Fig. 3, conducting connecting bar 220 can have limiting section 221, is conductively connected with limitingThe shift motion of bar 220.It is understood that can be equipped with limiting section 221 on conducting connecting bar 220, limiting section 221 is close to machineBody 10, limiting section 221 can limit the moving range of conducting connecting bar 220.Thus, it is possible to avoid 220 slave of conducting connecting barIt falls off on body 10 or conducting connecting bar 220 is protruded into too much in fuselage 10.
As shown in Fig. 2-Fig. 3, in some embodiments of the invention, conducting connecting bar 220 can be set there are two limiting section221, two limiting sections 221 can be spaced apart on the axis direction along the pivot of conducting connecting bar 220.Thus, it is possible to pass throughTwo limiting sections 221 limit the upper limit and conducting connecting bar of upward (on the as shown in FIG. 1 to FIG. 3) movement of conducting connecting bar 220The mobile lower limit of 220 downward (under as shown in FIG. 1 to FIG. 3).
For example, can be equipped with channel 110 on fuselage 10 as shown in Fig. 2-Fig. 3, conducting connecting bar 220 can pass through channel110, conducting connecting bar 220 can be moved relative to channel 110.Conducting connecting bar 220 can be set there are two limiting section 221,In limiting section 221 can be located at the top (top shown in Fig. 3 such as Fig. 2 -) in channel 110, another limiting section 221 can be withPositioned at the lower section (lower section shown in Fig. 3 such as Fig. 2 -) in channel 110, the distance between two limiting sections 221 are greater than the length in channel 110Degree, it should be noted that " length in channel 110 " mentioned herein can refer to: in Fig. 2-up and down direction shown in Fig. 3,The distance at 110 both ends of channel.
Conducting connecting bar 220 can be mobile (on as shown in FIG. 1 to FIG. 3) upwards, when conducting connecting bar 220 is one section mobileAfter distance, the lower end in channel 110 can be with the limiting section 221 close to 220 lower end of conducting connecting bar (under as shown in FIG. 1 to FIG. 3)It offsets, the stopping of conducting connecting bar 220 moves up；Conducting connecting bar 220 can be mobile (under as shown in FIG. 1 to FIG. 3) downwards, when leadingAfter the mobile a distance of the extension bar 220 that is electrically connected, the upper end in channel 110 can be with close 220 upper end of conducting connecting bar (such as Fig. 1-Fig. 3Shown on) limiting section 221 offset, conducting connecting bar 220 stopping move down.
As shown in Fig. 2-Fig. 3, in some examples of the invention, limiting section 221 can be to be formed in conducting connecting bar 220Raised 221a.It is understood that one end of limiting section 221 can be connect with conducting connecting bar 220, limiting section 221 it is anotherOne end can protrude from the outside wall surface of conducting connecting bar 220.Protrusion 221a can only be supported with the channel 110 on fuselage as a result, withLimit the shift motion of conducting connecting bar 220.Further, raised 221a may exist multiple, and multiple protrusion 221a can edgeThe circumferential direction of conducting connecting bar 220 be intervally arranged.Thus, it is possible to improve the sphere of action of raised 221a, protrusion is improvedThe effect stability of 221a.
As shown in Fig. 2-Fig. 3, in some examples of the invention, limiting section 221 can be to be formed in conducting connecting bar 220On sheet body 221b.One end of sheet body 221b can be connect with conducting connecting bar 220, and the other end of sheet body 221b can be towards leadingBe electrically connected extension bar 220 radial outside extend.Sheet body 221b can only be supported with the channel 110 on fuselage 10 as a result, to limit conductionThe shift motion of connecting rod 220.Further, sheet body 221b can in a ring, and sheet body 221b can be along conducting connecting bar 220Circumferential direction extend.
As shown in figs 1 to 6, in some embodiments of the invention, sensor 50 can in a ring, and sensor 50 is installedIn 200 inside of traveling wheel (for example, such as Fig. 4, inside shown in Fig. 7).It should be noted that " traveling wheel 200 mentioned hereinInside " can be traveling wheel 200 close to the side of 1 center of grass trimmer.Thus, it is possible to be convenient for the installation of sensor 50, alsoSensor 50 can be arranged on the non-appearance face of grass trimmer 1, so as to improve the aesthetics of grass trimmer 1.
Further, as shown in Figure 4-Figure 6, conductive resilient element 400 may include electroconductive elastic sheet 410, electroconductive elastic sheet 410First end is supported with sensor 50, and the second end of electroconductive elastic sheet 410 is fixed on support portion 100.Electroconductive elastic sheet 410 and row as a result,Sailing wheel 200 has relative motion, and in the operational process of traveling wheel 200, electroconductive elastic sheet 410 can be kept with sensor 50 alwaysElectrical connection.
Further, as shown in figure 4, electroconductive elastic sheet 410 can be configured to arc shape.The arc that electroconductive elastic sheet 410 is formedShape face is supported with sensor 50, can be with thus, it is possible to improve the contact stabilization between electroconductive elastic sheet 410 and sensor 50Avoid electroconductive elastic sheet 410 by sensor 50 wear or sensor 50 by electroconductive elastic sheet 410 scratch, damage the case where, so as toTo improve the working performance of grass trimmer 1.In some embodiments of the invention, electroconductive elastic sheet 410 is electrically connected with control circuit 30.Electroconductive elastic sheet 410 can serve as the signal transduction component between control circuit 30 and sensor 50 as a result, and electroconductive elastic sheet 410 canControl circuit 30 is passed to the signal for detecting sensor 50.
As shown in fig. 4-5, according to some embodiments of the present invention, moving assembly 20 includes first bearing 230 and firstBearing block 231, the inner ring of first bearing 230 are coated on the pivotal axis 210 of traveling wheel 200, first bearing seat 231 and fuselage 10Connection.First bearing seat 231 is coated on the outer ring of first bearing 230, and sensor 50 is coated at first bearing seat 231.As a result,Traveling wheel 200 and the connection of fuselage 10, assembly and compact-sized may be implemented, can also reduce pivotal axis 210 and fuselage 10 itBetween abrasion.
As shown in Figure 1-Figure 3, according to some embodiments of the present invention, moving assembly 20 may include 232 He of second bearingSecond bearing seat 233.Conducting connecting bar 220 can be connected on fuselage 10 by second bearing 232 and second bearing seat 233,Second bearing seat 233 is connect with fuselage 10, and second bearing seat 233, one end of conducting connecting bar 220 are placed in second bearing 232Inside it is placed on second bearing 232.Thus, it is possible to realize the connection of conducting connecting bar 220 and fuselage 10, assembly and compact-sized, alsoThe abrasion between conducting connecting bar 220 and fuselage 10 can be reduced.
According to some embodiments of the present invention, traveling wheel 200 can be driving wheel 201 or driven wheel 202.It is understood thatThat traveling wheel 200 can be driving wheel 201, and driving wheel 201 can drive grass trimmer 1 to move, traveling wheel 200 or fromDriving wheel 202, driven wheel 202 can be rotated with grass trimmer 1.
Below with reference to the grass trimmer 1 of Fig. 1-Fig. 8 detailed description according to some embodiments of the invention.It is worth understanding, underDescription is stated to be merely illustrative, rather than to concrete restriction of the invention.
Embodiment 1
As shown in Fig. 1-Fig. 3, Fig. 7-Fig. 8, in this embodiment, grass trimmer 1 includes fuselage 10, driving wheel 201, driven wheel202, capacitance signal processing pcb300, host control pcb310, conducting wire 320, conducting connecting bar 220, second bearing 232, secondBearing block 233, conductive torsional spring 420, cutter plate 60 and sensor 50.
Specifically, as shown in Figs. 7-8, there are two driving wheel 201 and two driven wheels 202 for the tool of grass trimmer 1.Two activesWheel 201 is located at the side of fuselage 10, and two driving wheels 201 are symmetrical.Two driven wheels 202 are located at the another of fuselage 10Side, and two driven wheels 202 are symmetrical.Two driving wheels 201 and two driven wheels 202 support fuselage 10, two masters jointlyFor driving fuselage 10 to move, fuselage 10 is further driven to two driven wheels 202 and moves driving wheel 201.Capacitance signal processingPcb300 and host control pcb310 are respectively positioned in fuselage 10, and capacitance signal is handled to be led between pcb300 and host control pcb310Cross the connection of conducting wire 320.
As shown in Figure 1-Figure 3, conducting connecting bar 220 is connected to fuselage 10 by second bearing 232 and second bearing seat 233On, second bearing seat 233 is connect with fuselage 10, it is placed on second bearing seat 233 in second bearing 232, the one of conducting connecting bar 220Second bearing 232 is placed in end, conducting connecting bar 220 can move pivotally relative to fuselage 10, the pivot of conducting connecting bar 220Shaft axis is vertical direction, i.e. up and down direction shown in Fig. 1.Fixed column 101, conductive torsional spring 420 can be equipped on fuselage 10It can be set in fixed column 101, one end and the fuselage 10 of conductive torsional spring 420 offset, and the other end of conductive torsional spring 420 can courtExtend to conducting connecting bar 220 and offsets with conducting connecting bar 220.Between conductive torsional spring 420 and capacitance signal processing pcb300It is connected by conducting wire 320.
Driven wheel 202 can be set on pivotal axis 210, one end of pivotal axis 210 and the other end of conducting connecting bar 220Connection can be equipped with first bearing 230 and first bearing seat 231, outside first bearing 230 between driven wheel 202 and pivotal axis 210It is placed on pivotal axis 210, first bearing seat 231 is coated at first bearing 230, and driven wheel 202 is coated at first bearing seat 231, fromDriving wheel 202 can move pivotally relative to pivotal axis 210, and the extending direction of pivotal axis 210 is horizontal direction, i.e. institute in Fig. 1The left and right directions shown.The pivotal axis 210 of driven wheel 202 and the pivot axis 220a of conducting connecting bar 220 are vertical.
As shown in Figure 1-Figure 3, sensor 50 can connect in the end of pivotal axis 210, and sensor 50 is close to driven wheel202.Pivotal axis 210 can be conduct piece, and whether sensor 50 can have grass, sensor with 1 position of real-time detection grass trimmerElectric signal can be passed to conducting connecting bar 220 by pivotal axis 210 by 50, and conducting connecting bar 220 is further passed to and ledElectric signal can be passed to capacitance signal by conducting wire 320 and handle pcb300, capacitance signal by electric torsional spring 420, conductive torsional spring 420Processing pcb300 passes through conducting wire 320 again and passes to host control pcb310, and host control pcb310 receives the detection of sensor 50To signal after carry out logic judgment, and then can control cutter plate 60 operating, to clear up lawn.Sensor 50 can be electricityHold sensor.
As shown in Fig. 2-Fig. 3, channel 110 can be equipped on fuselage 10, conducting connecting bar 220 can pass through channel 110, leadBeing electrically connected extension bar 220 can (as shown in FIG. 1 to FIG. 3 upper and lower) movement up and down relative to channel 110.Conducting connecting bar 220 can be withIf there are two limiting section 221, one of limiting section 221 can be located at channel 110 top (such as Fig. 2-it is shown in Fig. 3 onSide), another limiting section 221 can be located at the lower section (lower section shown in Fig. 3 such as Fig. 2 -) in channel 110, two limiting sections 221 itBetween distance be greater than channel 110 length, it should be noted that " length in channel 110 " mentioned herein can refer to: schemeIn 2- up and down direction shown in Fig. 3, the distance at 110 both ends of channel.
As shown in Fig. 2-Fig. 3, the limiting section 221 by close over (on as shown in FIG. 1 to FIG. 3) can be to be formed in conductionSheet body 221b in connecting rod 220.One end of sheet body 221b can be connect with conducting connecting bar 220, the other end of sheet body 221bIt can extend towards the radial outside of conducting connecting bar 220.Sheet body 221b can in a ring, and sheet body 221b can be along conduction evenThe circumferential direction of extension bar 220 extends.Limiting section 221 close to lower section (under as shown in FIG. 1 to FIG. 3) can be to be formed in conductionThe raised 221a of connecting rod 220.For raised 221a there may be multiple, multiple protrusion 221a can be along conducting connecting bar 220Circumferential direction is intervally arranged.
Conducting connecting bar 220 can be mobile (on as shown in FIG. 1 to FIG. 3) upwards, when conducting connecting bar 220 is one section mobileAfter distance, the lower end in channel 110 can offset with sheet body 221b, and the stopping of conducting connecting bar 220 moves up；Conducting connecting bar 220 canWith downwards (under as shown in FIG. 1 to FIG. 3) it is mobile, after the mobile a distance of conducting connecting bar 220, the upper end in channel 110 can be withIt offsets with raised 221a, the stopping of conducting connecting bar 220 moves down.Thus, it is possible to limit the shift motion of conducting connecting bar 220.
Grass trimmer 1 according to an embodiment of the present invention, by the way that sensor 50 is positioned close at the position of driven wheel 202,The installation and connection for not only facilitating sensor 50 can also avoid in the related technology since sensor is easily and caused by the collision of road surfaceErroneous judgement thereby reduces interference of the uneven road surface to sensor 50, improve grass trimmer 1 runnability and entirely throughProperty.