WO2017143994A1

WO2017143994A1 - String trimmer

Info

Publication number: WO2017143994A1
Application number: PCT/CN2017/074565
Authority: WO
Inventors: 查霞红; 赵凤丽; 杨雪雨
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2016-02-23
Filing date: 2017-02-23
Publication date: 2017-08-31
Also published as: CN206686614U; CN207543621U; CN107094420A; CN107094419A; CN107094421A; CN207543620U

Abstract

A string trimmer (100, 100') comprises a protruding rod (20, 20') that protrudes longitudinally and provides along a longitudinal direction with a first end and a second end opposite thereto; a trimmer head (10, 10') performing an operation and connected to the first end of the protruding rod; and a handle assembly (3040, 3040') configured for an operator to operate and comprising a first handle (30, 30') and a second handle (40, 40') connected to the second end of the protruding rod. The second handle has at least one operation position including a first position in which the second handle is arranged to provide support for an arm or elbow of the operator. The first handle and the second handle arranged in the first position can operate together to realize a single-handed operation. The string trimmer has a grass cutting state and trimming state operated using a single hand. The string trimmer enables a user to voluntarily choose to operate using a single hand or two hands, enhancing user experience.

Description

Grass mower

Technical field

The invention relates to an outdoor gardening cutting tool, in particular to a grass cutter.

Background technique

Green vegetation is an essential environmental element for our human beings, and the awareness of greening is becoming more and more popular. Whether it is a golf course, a football field, a manor, a villa's courtyard, or an ordinary residential community, green turf is everywhere, bringing vitality and vitality to people's lives. But if you leave people's care, these turf will become ups and downs and chaos.

As a gardening tool for turf, the lawn mower is being favored by more and more users. The lawnmower generally drives the cutting member to rotate it, usually including an extension rod extending longitudinally, a head disposed at the first end of the extension rod, a front handle disposed near the second end of the extension rod, and being disposed on the extension rod The rear handle of the second end. The head includes a grass head and a motor that drives the grass to rotate. When the lawn mower is working, the grass head is driven to rotate to drive the cutting parts in the grass head to rotate synchronously to fight grass.

When the user needs to take care of a large piece of flat turf, it is usually operated by two hands, one hand holds the front handle, the other hand holds the rear handle, and the grass cutter is lifted to work.

When the user needs to take care of some of the turf under the bushes or take care of the turf in a narrow space, it is very difficult to operate with both hands. The user has to operate the lawnmower with one hand, that is, holding the front handle or the rear handle with one hand for grassing. Due to the handle setting method of the existing lawnmower, the user has no support point when performing the one-hand operation, and therefore, the operation is not stable enough and has no comfort.

The setting method of the existing handle of the lawnmower can not meet the user's free choice of the one-hand operation mode and the two-hand operation mode according to the demand, and can not ensure the stability and comfort of the one-hand operation mode and the two-hand operation mode at the same time.

Summary of the invention

In view of the above, the technical problem to be solved by the present invention is to provide a lawn mower that has both a one-handed grassing mode and a one-handed trimming mode, and is designed in one-handed grass trimming mode or one-handed repairing. Both sides have good stability and comfort.

The technical solution adopted by the present invention to solve the prior art problem is:

A lawnmower comprising: a longitudinally extending extension rod, the extension rod being provided with a first end in a longitudinal direction and a second end opposite to the first end; a working head, the head and a first end of the extension rod is connected; a handle assembly for an operator to operate, the handle assembly including a connection to the extension a first handle and a second handle of the second end of the rod; the second handle includes at least one operating position, the at least one operating position comprising positioning the second handle at an arm or elbow that can be an operator Providing a first position against the support, the second handle cooperating with the first handle in a first position for one-handed operation, the lawnmower having a grassing state and trimming under one-handed operation status.

Preferably, the handpiece includes a casing, a motor disposed in the casing, and a cutting member driven by the motor, the cutting member rotating to form a cutting plane, when the lawnmower is in a trimming state And when the second handle is in the first position, the cutting plane is parallel to the direction in which the operator faces.

Preferably, the projection of the first handle on the ground is parallel or collinear with the projection of the extension rod on the ground.

Preferably, when the grass cutter is in the trimming state, a cross section of the first handle in the axial direction of the extension rod is parallel or coplanar with the cutting plane.

Preferably, the lawnmower comprises a sliding member or a rolling member that supports the lawnmower in a trimming state.

Preferably, the rolling member comprises at least one trimming roller, and when the lawnmower is in the trimming state, and the second handle is in the first position, the rolling direction of the trimming roller is facing the operator The direction is the same.

Preferably, when the lawnmower is in the trimming state, the trimming roller is parallel or coplanar with the cross section of the extension rod in the axial direction in a radial cross section.

Preferably, the handpiece is arranged to be rotated by a predetermined angle with respect to the extension rod in a radial direction of the extension rod to realize conversion between the trimming state and the grassing state.

Preferably, the handpiece includes a shroud and a pivot portion connected to the first end of the extension rod, the extension rod being selectively rotatable about the pivot portion in a direction away from the shroud, Or turn towards the shroud.

Preferably, the extension rod is a telescopic rod.

Preferably, the first handle includes a ring body portion that closes the second end of the extension rod, the ring body portion includes a first grip portion for an operator to hold, and when the second handle is located for one-hand operation In the first position, the first grip portion and the second handle form an angle of greater than or equal to 90 degrees and less than or equal to 140 degrees.

Preferably, when the second handle is in the first position under one-hand operation, the angle formed by the operator's arm and the ground is greater than or equal to 90 degrees and less than or equal to 140 degrees.

Preferably, the at least one operating position comprises an adjustable setting of the second handle for operation a second position held by the second handle in cooperation with the first handle in a second position to effect two-hand operation, the second handle being in the second position and the extension rod facing the first end Forming a second angle in the direction, the second angle is an acute angle, and the second handle is formed with a first angle in a direction of the first rod toward the first end in the first position, the first An angle is an obtuse angle.

Advantageously, said at least one operating position comprises positioning a second handle in a third position such that said lawnmower is in a stored state, said second handle being in a third position and said extension rod is oriented toward said first end A third angle is formed on the third angle, and the degree of the third angle is less than the degree of the second angle.

Preferably, the first, second and third positions of the second handle are adjustable, and the second handle is releasably locked in the plurality of first position, second position and third position.

Preferably, the lawnmower further comprises a locking mechanism for controlling the second handle to adjust the operating position, the locking mechanism causing the second handle to be in any one of the at least one operating position Locked and released for adjustment at any of the operating positions.

Preferably, the second handle comprises two extensions opposite to each other connected to the locking mechanism and a support connecting the two extensions, the first handle when the second handle is in the first position For the operator to hold with one hand, the support portion of the second handle is for the operator's arm or elbow to lean to achieve one-hand operation; when the second handle is in the second position, the first handle The second handle is provided for the operator's hands to perform the two-hand operation.

Preferably, the support portion is an arc-shaped recess for the operator's arm or elbow to lean against.

Preferably, the lawnmower further comprises an energy unit for providing energy to the handpiece, the energy unit being a battery pack.

Preferably, the battery pack is disposed on one side of the first handle.

Preferably, the battery pack and the motor are respectively located at the first end and the second end opposite to the extension rod.

Preferably, the percentage of the motor to the weight of the lawnmower is less than the percentage of the battery pack to the weight of the lawnmower.

Preferably, the ratio of the weight of the handpiece attached to the first end of the extension rod to the total weight of the handle assembly and the battery pack attached to the second end of the extension rod is between 1:0.7 and 3:7.

Preferably, the grass cutter has a weight of less than 2.8 kg.

Preferably, the center of gravity of the lawnmower is located on a side of the extension rod adjacent to the battery pack.

Preferably, the vertical distance between the projection of the center of gravity of the lawnmower on the ground and the projection of the center position of the first handle on the ground is 10 to 50 cm.

The technical problem to be solved by the present invention is to provide a lawnmower having both a one-handed grass-shaping mode and a one-handed trimming mode, and whether in the one-handed grass trimming mode or the one-hand trimming mode. Has good stability and comfort.

Another technical solution adopted by the present invention to solve the prior art problem is:

A lawnmower comprising: a longitudinally extending extension rod, the extension rod being provided with a first end in a longitudinal direction and a second end opposite to the first end; a working head, the head and a first end of the extension rod connected; a handle assembly for an operator to operate, the handle assembly including a first handle and a second handle coupled to the second end of the extension rod; the second handle including at least one An operating position, the at least one operating position comprising positioning the second handle in a first position that provides a support for an operator's arm or elbow, the second handle being in the first position and the first position A handle cooperates to achieve a one-handed operation, and the angle at which the operator's supported arm forms a direction toward the first end of the extension rod is 90 degrees to 180 degrees.

Preferably, the arm supported by the operator forms an angle with the extension rod of 120 to 150 degrees.

Another object of the present invention is to provide a lawn mower that can perform trimming work under one-hand operation, or perform grass-drawing work under one-hand operation, and the switching between the two working modes is simple and convenient, and is easy to operate. .

A lawnmower comprising: a longitudinally extending extension rod, the extension rod being provided with a first end in a longitudinal direction and a second end opposite to the first end; a working head, the head and a first end of the extension rod connected; a handle assembly for an operator to operate, the handle assembly including a first handle and a second handle coupled to the second end of the extension rod; the second handle including at least one An operating position, the at least one operating position comprising disposing a second handle in a first position that provides a support for an operator's arm or elbow, the second handle being in the first position with the first handle Cooperating to achieve one-handed operation, the lawnmower has a grassing state and a trimming state under one-hand operation, the handpiece being disposed in a radial direction of the extension rod relative to the extension rod The preset angle is rotated to realize the transition between the trimming state and the grassing state.

Preferably, the preset angle is 90 degrees.

Preferably, the extension rod is a telescopic rod.

Preferably, when the second handle is in the first position of the one-hand use state, the angle formed by the operator's arm and the ground is greater than or equal to 90 degrees and less than or equal to 140 degrees.

Preferably, the at least one operating position comprises a second position that is adjustable in the second handle for the operator to hold, and the second handle cooperates with the first handle in the second position to realize the two hands Operating, the second handle is formed with a second angle in a direction from the second position toward the first end of the extension rod, the second angle is an acute angle, and the second handle is in the first position The extension rod is formed with a first angle in a direction toward the first end, and the first angle is an obtuse angle.

Preferably, the lawnmower further comprises a locking device for controlling the second handle to adjust the operating position. The mechanism, the locking mechanism causes the second handle to be locked in any one of the at least one operating position and to perform a release adjustment in any of the operating positions.

Preferably, the battery pack is disposed on one side of the first handle.

Preferably, the grass cutter has a weight of less than 2.8 kg.

Another object of the present invention is to provide a lawn mower that can perform trimming work under one-hand operation, or perform grass-drawing work under one-hand operation, and can work by a DC drive lawnmower, which is greatly Reduce the weight of the whole machine.

A lawnmower comprising: a longitudinally extending extension rod, the extension rod being provided with a first end in a longitudinal direction and a second end opposite to the first end; a working head, the head and a first end of the extension rod connected; a handle assembly for an operator to operate, the handle assembly including a first handle and a second handle coupled to the second end of the extension rod; the second handle including at least one An operating position, the at least one operating position comprising disposing a second handle in a first position that provides a support for an operator's arm or elbow, the second handle being in the first position with the first handle Cooperate To achieve one-handed operation, the lawnmower has a grassing state and a trimming state under one-hand operation, the grasser further comprising an energy unit for providing energy to the handpiece, the energy unit being a battery package.

Preferably, the battery pack is disposed on one side of the first handle.

Preferably, the handpiece includes a casing, a motor disposed in the casing, and a cutting member driven by the motor, wherein the battery pack and the motor are respectively located opposite to the extension rod End and second end.

Preferably, the grass cutter has a weight of less than 2.8 kg.

Preferably, the vertical distance between the projection of the center of gravity of the lawnmower on the ground and the projection of the center position of the first handle on the ground is 10 cm to 50 cm.

Preferably, the cutting member rotates to form a cutting plane, and when the lawnmower is in the trimming state, and the second handle is in the first position, the cutting plane is parallel to the direction in which the operator faces.

Preferably, the at least one operating position comprises a second position that is adjustable in the second handle for the operator to hold, and the second handle cooperates with the first handle in the second position to realize the two hands Operating, the second handle is in the second position and the direction of the extension rod toward the first end Forming a second angle, the second angle is an acute angle, and the second handle is formed at a first position with a first angle in a direction of the extension rod toward the first end, the first clip The angle is an obtuse angle.

Preferably, the extension rod is a telescopic rod.

Compared with the prior art, the present invention has at least the following beneficial effects:

1. The present invention can be operated in different operating positions by the second handle, so that the operator can freely select the one-hand operation mode or the two-hand operation mode.

2. The lawnmower of the invention has both a grass-grazing mode and a trimming mode, and the position of the second handle is changed, thereby realizing the multi-purpose performance of the lawnmower, that is, having one-handed trimming and one-handed grassing The four working modes of trimming the hands and hands and grassing better meet the needs of different operators.

3. When the grass is drilled in the low corner, it can be operated with one hand and the telescopic extension rod, so that the operator can complete the work without bending or squatting, and has a comfortable user experience.

4. When trimming with one hand, the cutting plane is parallel to the direction the operator is facing. On the one hand, it can avoid the uncomfortable feeling caused by the two-handed body twist and realize an inline operation; on the other hand, it is easy for the operator to find the obstacle in front and reduce the probability of the machine touching the obstacle.

5. When working with one hand, the user's arm is naturally drooping, which is more in line with the requirements of human body dynamics, and the man-machine effect is better.

6. DC drive, reduce the weight of the whole grass machine, the battery pack and the motor are distributed at the opposite ends of the grass cutter to realize the rationality of the weight distribution before and after, which makes the operator more labor-saving when lifting the machine.

DRAWINGS

The above described objects, technical solutions, and advantageous effects of the present invention can be made by the following detailed description of specific embodiments of the present invention.

The same numbers and symbols in the drawings and the description are used to represent the same or equivalent elements.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a lawnmower according to a first embodiment of the present invention in a grassing state and a second handle in a first position.

Figure 2 is a perspective view of the second handle of the lawnmower of Figure 1 in a second position.

Figure 3 is a perspective view of the second handle of the lawnmower of Figure 1 in a third position.

4 is a perspective view of the lawnmower of FIG. 1 in a trimmed state with the second handle in a first position.

Fig. 5 is a schematic front view showing the rear handle of the lawnmower of the second embodiment of the present invention in a first position.

Figure 6 is a front elevational view showing the position adjustment of the rear handle of the lawnmower of Figure 5.

Figure 7 is a schematic front view of the rear handle of the lawnmower of Figure 5 in a second position.

Figure 8 is a schematic view of the front handle along the A direction in Figure 5;

Figure 9 is a schematic view of the rear handle along the B direction in Figure 7.

Figure 10 is a schematic view showing the structure of the locking mechanism of Figure 5.

Figure 11 is a schematic view of the rear handle in the C direction of Figure 10.

Figure 12 is a schematic diagram showing the operation mode of the lawnmower shown in Figure 5 by the user with one hand.

Figure 13 is a schematic view showing the operation mode of the lawnmower shown in Figure 5 by the user.

Figure 14 is a front elevational view of the lawnmower handle assembly of the other embodiment in a first position.

Figure 15 is a front elevational view of the lawnmower handle assembly of the other embodiment in a second position.

detailed description

As shown in FIG. 1 to FIG. 4, which is a first embodiment of the present invention, the embodiment discloses a garden tool that can be switched between two-hand operation and one-hand operation. In this embodiment, The garden tool is mainly explained by a hand-held lawnmower.

As shown in Figures 1, 2 and 3, the lawnmower 100' includes a longitudinally extending extension rod 20', a working head 10', and a handle assembly 3040' for operation by an operator. The extension rod 20' is provided with a first end and a second end opposite to the first end in the longitudinal direction. A head 10' for performing work is coupled to the first end of the extension rod, and a handle assembly 3040' is coupled to the second end of the extension rod 20'.

The handpiece 10' is coupled to the first end of the extension rod 20' remote from the handle assembly 3040'. The handpiece 10' includes a casing 14', a motor (not shown) disposed within the casing, and a cutter (not shown) that is driven by the motor to rotate about the first axis X' in the working plane. In the present embodiment, the cutting member is a grassing line, and the material of the grassing line is composed of a solid non-metallic material such as nylon or carbon fiber material. Under the drive of the motor, the first axis X' of the grass-wound head mounted on the bottom of the head 10' is rotated at a high speed to trim the lawn. The grass line rotation constitutes a cutting plane with the motor shaft as the center and the length of the grass line as the radius. As is known to those skilled in the art, the cutting member can also be in other forms, such as a blade or the like. In order to avoid accidental injury to the human body during the operation of the lawn mower, a shield 12' is fixedly disposed on the head 10'. In order to prevent accidental injury to the flowers during the weeding, the head 10' is also provided with a protective wire 13.

The handle assembly 3040' is of a plastic material that can be attached to the second end of the extension rod 20' by injection molding or can be assembled to the second end of the extension rod 20' by mechanical attachment. The handle assembly 3040' includes a first handle 30' and a second handle 40' that are coupled to the second end of the extension rod 20'.

Preferably, the second handle 40' includes at least one operating position, the at least one operating position including the second handle 40' being disposed in a first position that provides support and support for the operator's arm or elbow, second The handle 40' cooperates with the first handle 30' in a first position for one-handed operation. The angle at which the operator's supported arm and the extension rod 20' are oriented toward the first end is from 90 degrees to 180 degrees. The angle may be: 90 degrees, 95 degrees, 100 degrees, 105 degrees, 110 degrees, 115 degrees, 120 degrees, 125 degrees, 130 degrees, 135 degrees, 140 degrees, 150 degrees, 160 degrees, 170 degrees, 180 degrees. Preferably, by experiment, the angle formed by the operator's supported arm and the direction of the extension rod 20' toward the first end The degree is 150 degrees, the operator's arm presents the best natural drooping state, and the supported arm is close to the ground perpendicular to the ground, which can greatly enhance the comfort of the work, more in line with the human body dynamics, and better man-machine effect. Therefore, in the present embodiment, the angle formed by the arm of the operator supported and the direction in which the extension rod 20' faces the first end is preferably 150 degrees.

As a preferred embodiment of the present invention, the at least one operating position includes the second handle 40' being adjustably disposed to have a second position that cooperates with the first handle 30' to effect two-hand operation. When the second handle is in the second position, the first handle 30' and the second handle are respectively held by the operator's hands to achieve two-hand operation. Further, the second handle 40' can be respectively fixed in the first position and the second position, and the second handle 40' is different in the first position from the extension rod 20' toward the first end. The number of angles formed between it in the second position and the direction in which the extension rod 20' faces the first end. Specifically, the angle formed by the second handle in the 40' first position with the extension rod 20' toward the first end is defined as the first angle A3, and the second handle 40' is extended in the second position. The angle formed by the rod 20' toward the first end is defined as the second angle A4. The first angle A3 is an obtuse angle, and the angle of the first angle A3 ranges from 90 degrees to 180 degrees. The first angle A3 may be 90 degrees, 95 degrees, 100 degrees, 105 degrees, 110 degrees, 115 degrees, 120 degrees, 125 degrees, 130 degrees, 135 degrees, 140 degrees, 150 degrees, 160 degrees, 170 degrees, 180 degrees. degree. A preferred value is 150 degrees. So designed, the second handle can support or lean against the operator's arm or elbow when operating with one hand. The second angle A4 is an acute angle, and the angle of the second angle A4 ranges from 40 degrees to 80 degrees. The second angle A4 may be 40 degrees, 50 degrees, 60 degrees, 70 degrees, or 80 degrees. A preferred value is 60 degrees. The design is such that the line between the highest point of the first handle 30' and the highest point of the second handle 40' is substantially parallel to the ground to achieve a more labor-saving operation for the operator when the two-hand operation is performed.

As another preferred embodiment of the present invention, as shown in Fig. 3, the at least two operating positions further include a third position in which the device is in the stored state, and the second handle 40' can remain fixed in the third position. Specifically, the angle formed by the second handle 40' in the third position with the extension rod 20' toward the first end is defined as the third angle A5. In the present embodiment, the third angle A5 is an acute angle, the degree of the third angle A5 is smaller than the degree of the second angle A4, and the angle of the third angle A5 is 0 to 20 degrees, preferably 5 degrees. This is designed to reduce the space occupied by the machine when the lawn mower is in the storage state and to facilitate transportation.

Further, the first position, the second position, and the third position of the second handle 40' are all adjustable, and the second handle is releasably locked in the plurality of first position, second position and third position. On the one hand, the operator can adjust the position of the second handle 40' as needed to cut the different operating states. Change (one-hand operation or two-hand operation); on the other hand, it is convenient for the operator to further adjust the comfortable use angle according to his own needs under different operating conditions.

As shown in Figures 1 through 4, the second handle 40' can be pivoted from the first position to the second or third position. The lawnmower includes a locking mechanism (not shown) that controls the second handle 40' for adjustment of the operating position. The locking mechanism causes the second handle 40' to be released in any of the at least two operating positions and locked in any one of the at least two operating positions. In the embodiment, the locking mechanism is a knob locking device, and the knob locking device includes a knob portion and a columnar pin portion connected to the knob portion. The outer side of the pin portion is provided with a continuous external thread. The ends of the two extensions of the second handle 40' are respectively provided with a first through hole for the pin portion of the knob locking device, and the second end of the first handle 30' or the extension rod 20' is provided with a knob lock a second through hole penetrating through the pin portion of the fastening device. The first through hole and the second through hole are disposed in a direction perpendicular to the extending direction of the extending rod, and the inner walls of the first through hole and the second through hole are respectively provided with a threaded engagement with the external thread of the pin portion. internal thread. When it is desired to adjust the position of the second handle 40', the operator only needs to rotate the knob portion such that the second handle 40' is in an active state and then adjust the second handle 40' to the proper position. The locking mechanism provided in the embodiment has the advantages of simple structure, convenient disassembly, low cost and convenient use by an operator. Of course, in other embodiments, the locking mechanism may also be a slider shifting device (not shown) provided with a plurality of adjustment gear positions that cause the second handle to be in different positions.

As shown in Figs. 1 and 2, the first handle 30' is substantially D-shaped and is disposed at the second end of the extension rod 20'. The first handle 30' includes a ring body portion 31 that closes the second end of the extension rod 20'. The ring body portion 31 is enclosed in a hollow configuration for the operator's hand to pass through for easy grip. The ring body portion 31 includes a first grip portion 33 that is held by an operator. When the second handle 40' is in the first position of the one-hand operation, the angle formed by the first grip portion 33 and the second handle 40' is greater than or equal to 90 degrees and less than or equal to 140 degrees. The angle may be 90 degrees, 95 degrees, 100 degrees, 105 degrees, 110 degrees, 115 degrees, 120 degrees, 125 degrees, 130 degrees, 135 degrees, 140 degrees. In the present embodiment, the angle formed by the first grip portion 33 and the second handle 40' is 105 degrees. Of course, when the second handle 40' is further urged to be in the first position under one-hand operation, the angle formed by the operator's arm with the ground is 90 degrees or more and 140 degrees or less. The design is such that the operator's arm rests under the support of the second handle 40', so that the support arm presents a natural drooping comfortable working state, and further ensures that the operator's arm is in close contact with the second handle 40', reducing the arm. The fatigue of the arm when the operator is working. Further, the first handle 30' is provided with a start switch 70' and a safety switch 72'. The safety switch 72' is opened and the start switch 70' is pressed to operate the grass cutter. In the present embodiment, the start switch 70' is elongated The utility model is disposed on the inner side of the ring body portion 33 so as to facilitate direct pressing when the operator grips the ring body portion 33. The safety switch 72' is in the shape of a column button, and is protruded on the side wall of the ring body portion 33, preferably The safety switch is protruded from the left side wall of the ring body portion 33. When the operator holds the first handle 30', the operator's thumb just touches the touch safety switch 72', and after pressing the safety switch 72', the operator's palm or finger can synchronize with the start switch 70' or Press and hold a little later to achieve a quick start of the machine. The start switch 70' and the safety switch 72' in this embodiment are both disposed on the first handle 30', which is compact in structure and convenient for the operator to start the machine with one hand.

The second handle 40 ′ is substantially U-shaped, and includes two extending portions 41 opposite to each other, a supporting portion 43 provided at an end of the second handle 40 ′ for connecting the two extending portions 41 , and a supporting portion 43 . A crossbar portion 45 between the 43 and the first handle 30' for connecting the two extensions 41. The support portion 43 is an arc-shaped recess for the operator's arm or elbow to lean against, and the arc-shaped recess can increase the comfort of the operator's arm in contact with the second handle. Of course, the second handle 40' may further include a cushion (not shown) laid or embedded on the support portion 43 for contacting the operator's arm, the cushion being perpendicular to the extending direction of the extension rod 20'. The direction extends and exceeds a certain width of the operator's arm to cushion the pressure of the operator's arm or elbow against the support portion, thereby reducing the discomfort of the operator's long arm and the second handle 40'. In the present embodiment, on the one hand, in order to ensure that the arm of the operator's elbow joint is freely movable, and on the other hand, in order to make the operator lift the lawnmower 100' more labor-saving, the second handle 40' is on the extension rod 20 The length in the direction of extension needs to be less than or equal to the length of the forearm of the operator's arm and greater than or equal to half the length of the forearm of the operator's arm. The length of the second handle herein should be defined as the linear distance between the free end of the handle and the support point that supports the operator's arm. In the present embodiment, the operator is tested for work comfort for operators of different heights, and it is found that when the length of the second handle 40' is controlled within a value range of 15 to 30 cm, it can be used by an operator of 1.5 to 1.9 meters. Comfort. Specifically, the second handle 40' may have a length of 15 cm, 15.5 cm, 16 cm, 16.5 cm, 17 cm, 17.5 cm, 18 cm, 18.5 cm, 19 cm, 19.5 cm, 20 cm, 20.5 cm, 21 cm, 22 cm, 23 cm, 24 cm, 25cm, 26cm, 27cm, 28cm, 29cm, 30cm. In particular, in the present embodiment, when the length of the second handle is 17.5 cm, the second handle 40' can provide a good supporting effect on the forearm of the operator's arm in the range of 1.5 m to 1.9 m in height, that is, The second handle 40' is most comfortable to the forearm of the operator's arm and the position is also most reasonable. To prevent the longer second handle 40' from causing the stress of the extension 41 of the second handle 40' to deteriorate. Therefore, the design of the cross bar portion 45 ensures that the second handle 40' has sufficient stress strength. The crossbar portion 45 separates the second handle 40' into a accommodating At least a portion of the first opening 46 of the first handle 30' and a second opening 47 at the rear side of the first opening.

Preferably, the lawnmower 100' disclosed in this embodiment can be used in one machine, that is, four modes of use: one-handed grassing, one-handed trimming, two-handed grassing, and two-handed trimming. The operator can select the appropriate usage mode according to his own needs, and the selection range is wider. In particular, in the present embodiment, when the lawnmower is in the trimming state and the second handle is in the first position (one-hand operation), the cutting plane is parallel to the direction in which the operator faces. Further, the projection of the first handle 30' on the ground is parallel or collinear with the projection of the extension rod 20' on the ground. When the lawnmower 100' is in the trimming state, the cross section of the first handle 30' in the axial direction of the extension rod 20' is parallel or coplanar with the cutting plane. In this way, on the one hand, the discomfort of the operator's body in a distorted state when the trimming operation of the lawnmower 100' is performed by both hands is avoided; on the other hand, when an obstacle appears in front of the lawn mower, the operator can be the first time. Discover and promptly take the machine to avoid obstacles, greatly reducing the probability of machine obstacles.

It should be noted that the cutting member rotates at a high speed to form a cutting plane, and the parallelism is not absolutely parallel because the speed of the cutting member is fast or the external environmental factors easily affect the parallelism. A slight deviation of the limited angle is also within the scope of this application.

The lawnmower 100' also includes a rolling member 80 that supports the lawnmower. Of course, in other embodiments, a slider (not shown) may also be employed to support the lawnmower. Wherein, the sliding member can be an arc-shaped metal wire ring.

The rolling member 80 is mounted on the casing 14' and is located on the upper side of the shroud 12', which can serve as a trimming support wheel in the trimming mode and further guides the movement of the lawnmower 100'. The rolling member 80 includes a trimming roller 81 and a connecting arm 83 attached to the casing 14'. In the present embodiment, when the lawnmower is in the trimming state and the second handle 40' is in the first position, the rolling direction of the trimming roller 81 coincides with the direction in which the operator faces. Further, when the second handle 40' is in the first position (one-hand operation), and the lawnmower is in the trimming state, the cross section of the trimming roller 81 in the radial direction and the extension rod 20' are axially The cross-sections are parallel or coplanar; further, the cross-section of the ring body portion 31 of the first handle 30' in the axial direction of the extension rod 20' is parallel or coplanar with the cross-section of the trimming roller 81 in the radial direction. In this way, the operator's comfort during the trimming operation is further ensured. In the present embodiment, the number of the trimming rollers 81 is two, and the two rollers are coupled together by the axle 85. Of course, the trimming roller can also be set to one or more wheels. The axle 85 of the trimming roller 81 is provided with a roller center axis y. In the trimming mode, the center axis y of the roller of the trimming roller 81 is disposed in parallel with the first axis X' of the axis of rotation of the grass. The lawnmower 1 performs a trimming operation on a vertical plane. The user can push the lawnmower to trim the edge along the corner or the roadside. In the grassing mode, the center axis y of the roller of the trimming roller and the grassing line are rotated. The first axis X' of the shaft is also arranged in parallel. One end of the connecting arm 83 is directed to and connected to the axle 85, and the other end is directed to the center of the casing 14' and is connected thereto. The trimming roller 81 is fixedly mounted on the casing 14' via the connecting arm 83, and the connecting arm 83 The curved rod member, but not limited to the curved rod member, may also be a linear rod member. Of course, in other embodiments, the connecting arm 83 and the casing 14' may also be provided in a detachable connection to facilitate the repair and replacement of the trimming roller 81.

As shown in Figures 1, 2 and 4, the extension rod 20' is a telescopic rod, and the operator can adjust the length of the extension rod 20' according to his height or work requirements to achieve a comfortable user experience. Preferably, the outer periphery of the extension rod 20' is sleeved with a telescopic sleeve 21 which is rotatable in the radial direction of the extension rod 20' to effect expansion or fixation of the extension rod 20' in the axial direction. The extension rod 20' includes a first rod portion and a second rod portion that are sleeved together, and the telescopic sleeve 21 is disposed at a joint of the first rod portion and the second rod portion. Specifically, when the operator needs to increase or shorten the length of the extension rod 20', it is only necessary to rotate the telescopic sleeve 21 so that the telescopic sleeve 21 and the extension rod 20' are in a released state, thereby performing the elongated extension rod 20' or the compression extension rod. 20' achieves adjustment of the length of the extension rod 20'. In the present embodiment, the telescopic sleeve 21 is made of a rubber material, and the telescopic sleeve 21 includes a plurality of convex ribs 22 that are spaced apart in the axial direction and a recessed portion 23 that is disposed between the adjacent two ribs. The friction between the operator's hand and the telescopic sleeve 21 is increased by the arrangement of the ribs 22, which facilitates the operator to adjust the length of the extension rod 20' by rotating the telescopic sleeve 21. Of course, in other embodiments, the adjustment of the length of the extension rod 20' can also be realized by other common adjustment length devices such as button adjustment devices, which will not be described herein.

In the present embodiment, one end of the extension rod 20' connected to the head 10' is further provided with a pivot portion 15 which is selectively rotatable about the pivot portion 15 in a direction away from the shield 12' or toward The direction of the shield 12' is rotated. Thus, the extension rod 20' can be pivoted upwardly or downwardly relative to the nose by the pivot portion 15 to effect operation of the extension rod 20' relative to the pivot portion 15 at any predetermined angle of rotation. Further, the extension rod 20' can be rotated clockwise downwards 15 degrees, 30 degrees, 35 degrees, 45 degrees, 50 degrees, and more toward the shroud 12' in the one-hand operation state shown in FIG. angle. The extension rod 20' can be rotated counterclockwise upwards by 15 degrees, 30 degrees, 35 degrees, 45 degrees, 50 degrees, 60 degrees, 75 degrees, 90 degrees in the storage state shown in FIG. 3 in a direction away from the shield 12'. , 105 degrees, 120 degrees and larger angles. This design allows the operator to easily perform grass-cutting or trimming operations on any angle of the lawn according to the actual situation. Preferably, when the lawn mower 100' is in the grassing state, the extension rod 20' and the cutting plane are arranged at an angle ranging from 35 to 50 degrees (preferably 45 degrees), which is suitable for the user to use the lawnmower 100' The grass is placed in a state where the cutting plane and the ground are parallel. When the lawnmower 100' is in the trimming mode, the extension rod 20' and the cutting plane are arranged substantially in parallel, in the shape The angle is not more than 5 degrees, and it is suitable for the user to put the lawn mower in the state where the cutting plane and the ground are perpendicular to the trimming work. Preferably, in the grassing state or the trimming state, the extension rod 20' is arranged at an angle to the ground, and the angle ranges from 30 to 50 degrees, and the angle may be specifically 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees. It is preferably 45 degrees, which can meet the needs of the general operator's height and has the best work comfort.

In the present invention, by adjusting the telescopic sleeve 21, the pivot portion 15, and the one-hand operation, the grass cutter can be smoothly placed on the low corner or the turf in the narrow space (for example, under the park bench) The lawn and some turf under the bushes can also prevent the operator from squatting or bending or bending the arm while carrying out the grassing operation, which greatly reduces the fatigue of the work and the discomfort of the work. The operation process is as follows (this embodiment is exemplified by a park bench): First, the operator can adjust the angle between the extension rod 20' and the ground according to the height of the bench seat surface to ensure the head 10' of the grass cutter. Can reach into the corner. Specifically, the extension rod 20' is rotated clockwise downward or counterclockwise with respect to the pivot portion 15 to a suitable working angular position. Next, the operator can select the length of the appropriate extension rod 20' by rotating the telescoping sleeve 21; finally, adjust the second handle 40' to the first position of the one-hand operation. It should be clarified that the above operation process is only an example, and there is no uniqueness, and the order of the specific operation process can be adjusted according to the operator's habit. The structure of the lawnmower 100' in this embodiment, through the cooperation of the telescopic sleeve 21 and the pivot portion 15, allows the head 10' to smoothly extend into the inner side of the low corner to perform the grassing operation, by adjusting the second handle 40' The position of the operator is such that the operator's body does not need to be bent or squatted, and the operator's arm can be kept substantially upright with good working comfort.

In the present embodiment, the handpiece 10' is arranged to be rotated relative to the extension rod 20' in a radial direction of the extension rod 20' to achieve a transition between the trimming state and the grassing state. . Preferably, the handpiece 10' includes a rotating portion 17 coupled to the first end of the extension rod 20', the rotating portion 17 effecting rotation of the handpiece 10' relative to the extension rod 20' in the radial direction of the extension rod 20'. In the present embodiment, the rotating portion 17 can be pulled forward by the operator in the grassing state shown in Fig. 1 or Fig. 2 and rotated 90 degrees to one side, thereby obtaining the trimming state shown in Fig. 4. The specific operation process is: first, the extension rod 20' is rotated clockwise downward relative to the pivot portion 15 until the extension rod 20' is substantially parallel to the ground; then the operator pulls the rotation portion 17 forward, and the rotation portion 17 Rotate 90 degrees to one side so that the extension rod 20' is substantially level with the cutting plane. In this way, the switching between the grassing state and the trimming state is realized. Compared with the general grass cutter 100', the operator needs to rotate the nose or the whole machine by 180 degrees to realize the switching between the grassing state and the trimming state, and the solution of the present invention is easier to operate and more practical. By the cooperation between the telescopic sleeve 21, the pivot portion 15, and the rotating portion 17, not only the operator adjusts the extension rod 20' The positional relationship with the handpiece 10' results in different grassing actions and user experiences, and also allows the grass mower to switch between the grassing work state and the trimming state.

The position of the extension rod 20' adjacent the handle assembly 3040' is also typically provided with an energy providing unit for powering the lawnmower 100'. In the present embodiment, the energy supply unit is a battery pack 50', preferably a lithium battery pack. Of course, in other embodiments, the lawn mower can also be powered by installing a gasoline engine or by externally connecting an AC power to the power cord. In the present invention, the battery pack 50' and the motor are distributed at opposite first and second ends of the extension rod 20'. The weight of the battery pack 50' is greater than the weight of the grasser 100' by the weight of the motor. Specifically, the ratio of the weight of the handpiece 10' attached to the first end of the extension rod 20' to the total weight of the handle assembly 3040' and the battery pack 50' attached to the second end of the extension rod 20' ranges from 1:0.7 to 3: 7. Compared with the external power supply of the power line, the DC drive can reduce the weight of the motor, thereby reducing the weight of the whole machine. In the present embodiment, the weight of the lawnmower is less than 2.8 kg. This makes it easier for the operator to lift the machine and reduce the fatigue of the operator's arm for a long time.

Further, the position of the battery pack 50' is placed on one side of the extension rod 20'. Specifically, the battery pack is disposed below the first handle 30'. The center of gravity of the lawnmower 100' is shifted back, and the center of gravity layout is more reasonable. The operator can lift the grasser 100' by the handle assembly 3040' to work less. In the present embodiment, the position of the center of gravity of the lawnmower 100' is located on the side of the extension rod 20' adjacent to the battery pack 50'. Specifically, the vertical distance between the projection of the center of gravity of the lawnmower 100' on the ground and the center of the holding position of the first handle 30' is projected on the ground from 10 cm to 50 cm. The vertical distance may be 10 cm, 20 cm, 25 cm, 30 cm, 35 cm, 40 cm, 45 cm, 50 cm. Preferably, when the vertical distance is 25 cm to 40 cm, the center of gravity of the lawn mower is close to the second end of the extension rod and the layout of the whole machine is more reasonable, and the fatigue of the operator's arm under long time operation can be reduced.

As shown in FIG. 5 to FIG. 15 , in the second embodiment of the present invention, the lawn mower 100 of the present embodiment includes an extension rod 20 extending longitudinally and a head 10 disposed at one end of the extension rod 20 , and is disposed on the extension rod 20 . The handle assembly 3040 at the other end.

The handpiece 10 includes a shroud 12, a casing 14, a motor (not shown) disposed within the casing 14, and a grass head 16 that is rotated by an electric motor about an axis X. The axis X is the axis of rotation of the grass head 16. The cutting head 16 is provided with a cutting member 18, and the grass head 16 is driven to rotate to drive the cutting member 18 in the grass head 16 to rotate synchronously to hit the grass. In this embodiment, the cutting member 18 is a grass line. When the grass head is rotated, the grassing line extending out of the 16th part of the grass head forms a cutting plane perpendicular to the axis X for trimming and cutting the lawn. As is known to those skilled in the art, the cutting member can also be in other forms. Such as the form of a blade. Preferably, the head 10 can also be provided with accessories such as rollers and flower-protecting wires.

The lawnmower 100 of the present embodiment has a grassing mode and a trimming mode. When the lawnmower 100 is in the grassing mode, the extension rod 20 is disposed at an angle to the aforementioned cutting plane, and the angle is preferably greater than 30 degrees, which is suitable for the user to place the lawnmower 100 in a state where the cutting plane and the ground are parallel. Work in the grass. When the lawnmower 100 is in the trimming mode, the extension rod 10 and the cutting plane are arranged substantially parallel, forming an angle of no more than 5 degrees, which is suitable for the user to place the lawnmower 100 in a state where the cutting plane and the ground are perpendicular to the repair. Work side by side.

In the present embodiment, the extension rod 20 and the head 10 are connected by a rotating shaft 11 which is arranged parallel to the cutting plane, and the extension rod 20 rotates about the rotating shaft 11 with respect to the head 10 in the aforementioned grassing mode and repair. Switch between edge modes.

In the present embodiment, the extension rod 20 extends in the longitudinal direction and has two ends in the longitudinal direction. As shown in FIG. 5, for the convenience of description, the end of the extension rod 20 and the head 10 are respectively defined as the first end of the extension rod 20, and the other end of the opposite end is the second end of the extension rod 20.

As shown in FIG. 5, in the present embodiment, a power source is disposed near the second end of the extension rod 20, specifically a DC power source, and the DC power source is a battery pack 50, preferably a lithium battery pack. Thus, the DC power source 50 and the head 10 are disposed at both ends of the extension rod 20, and the handle assembly 3040 is disposed on the extension rod 20 at a position relatively close to the power source 50, so that the center of gravity of the entire lawnmower 100 is reasonable, and the operator passes the handle. When the assembly lifts the grass cutter 100, it can be labor-saving.

Referring to FIGS. 5 and 6, in the present embodiment, the handle assembly 3040 includes a front handle 30 disposed adjacent the second end of the extension rod 20 and a rear handle 40 disposed at the second end of the extension rod 20. The front handle 30 is disposed at a distance from the rear handle 40 to facilitate the operator to reliably lift the grass cutter 100 to work.

The front handle 30 is fixedly coupled to the vicinity of the second end of the extension rod 20, specifically integrally formed with the extension rod 20 during the manufacturing process, or sleeved or snapped or screwed onto the extension rod 20. The angle of the front handle 30 toward the first end of the extension rod 20, in particular, the angle α between the central axis Z of the front handle 30 and the first end direction of the central axis Y in the longitudinal direction of the extension rod 20 is an acute angle. The start switch 70 is disposed on the front handle 30. With this arrangement, when the operator holds the front handle 30, the operator can control the operation of the lawnmower 100 by touching the start switch 70 with the finger. In order to prevent the operator from erroneously triggering the start-up 70, a safety switch 72 is provided at another position of the front handle 30 near the start switch 70. The operator can only start the mower 100 after the safety switch 72 is triggered or the safety switch 72 and the start switch 70 are simultaneously activated. In the present embodiment, both the start switch 70 and the safety switch 72 are disposed on the front handle 30, so that the operator can control the work of the grass cutter 100 with one hand.

As shown in FIG. 8, one shape of the front handle 30 is provided. In this embodiment, the front handle 30 includes a first grip 32 and a second grip 34. As shown in FIG. 8, the first grip portion 32 and the second grip portion 34 are substantially elongated, and the longitudinal directions of the two are substantially perpendicular to each other. As is known to those skilled in the art, the shape of the front handle 30 is not limited to the example shown in Fig. 8, and only the shape of the front handle 30 can be easily grasped by the operator. For example, the first grip portion 32 is not elongated and is spherical, or the shape of the front handle 30 is similar to a beam shape or a handle shape or only one grip portion, etc., and details are not described herein again.

Referring to FIGS. 5-7, in the present embodiment, the rear handle 40 is movably coupled to the second end of the extension rod 20. Specifically, as shown in FIG. 10, the rear handle 40 pivots about a pivot axis 61 that extends substantially in the longitudinal direction of the vertically extending rod 20, changing the positional relationship of the rear handle 40 with respect to the front handle 30. The operator freely selects one of the one-hand operation positions (first position) or the two-hand operation position (second position) by adjusting the position of the rear handle 40. The process of switching the rear handle 40 between the first position and the second position about the pivot axis is as shown in FIG. As shown in FIG. 6, when the rear handle 40 is in the first position, the angle between the rear handle 40 and the extension rod 20 is β1. As shown in FIG. 7, when the rear handle 40 is in the second position, the angle between the rear handle 40 and the extension rod 20 is β2. The angles of β1 and β2 are different. As is known to those skilled in the art, the first and second positions of the rear handle defined herein are adjustable, i.e., the rear handle is releasably locked in a plurality of first and second positions.

A locking mechanism 60 is provided at the junction of the rear handle 40 and the second end of the extension rod 20. The operator loosens (or unscrews, opens) the locking mechanism 60, and the rear handle 40 is free to pivot about the pivot shaft 61. When the operator adjusts the rear handle 40 to the desired position, the locking mechanism 60 is released (or tightened, closed), and the rear handle 40 is fixed at the desired position and cannot be rotated about the pivot shaft 61. As known to those skilled in the art, the specific structure of the locking mechanism 60 for realizing the above functions is various, such as a cam wrench mechanism, a knob snap structure, etc., and only one example is given here, and the specific structure of the embodiment cannot be used. Limit the invention.

In this embodiment, the specific structure of the locking mechanism 60 is as shown in FIG. The locking mechanism 60 includes an elastic member 63, an inner tooth member 67 and an outer tooth member 65. In the present embodiment, the extension rod 20 is formed by the first half shell rod 202 and the second half shell rod 204 being snapped together. The rear handle 40 is provided with an annular connecting portion 406 at the junction with the extension rod 20. As shown in FIG. 11, the annular connecting portion 406 is provided with a through hole in a direction substantially perpendicular to the longitudinal axis Y of the rod 20 (i.e., the direction of the drawing M), and an outer tooth member 65 is provided on one inner wall of the through hole. The extension rod 20 is provided with an annular groove portion at the junction with the rear handle 40, and the annular groove portion is engaged with the annular connection portion 406. The second half-shell rod 204 is provided with a stud 208 at the position of the annular groove portion, and the stud 208 is provided with a groove for accommodating the elastic member 63 in the M direction. An internal tooth member 67 that is fitted to the external tooth member 65 is provided on the pressing member 69. One end of the elastic member 63 is located in the groove of the stud 208, and one end is located at the pressing member 69. Inside. One end of the pressing member 69 cooperates with the stud 208 to form a pivot shaft 61 that substantially perpendicularly extends the longitudinal center axis of the rod 20. The pivot shaft 61 is located in the through hole of the annular connecting portion 406, and the outer tooth member 65 on one inner wall of the through hole cooperates with the inner tooth member 67 on the pressing member. When the elastic member 63 is in the original state, the internal tooth member 67 is engaged with the external tooth member 65, and the rear handle 40 is relatively fixed to the extension rod 20. When the elastic member 63 is in a compressed state, the inner tooth member 67 is disengaged from the outer tooth member 65, and the rear handle 40 is relatively movable with the extension rod 20.

When the operator needs to adjust the relative position of the rear handle 40 and the extension rod 20, the operator presses the pressing member 69, so that the elastic member 63 is changed from the original state to the compressed state, and the internal tooth member 67 is separated from the external tooth member 69, the operator The handle 40 is operatively rotated about the pivot axis 61 to adjust the rear handle 40 to its desired position. When the rear handle 40 has been adjusted to the position desired by the operator, the operator releases the pressing member 69, and the elastic member 63 is changed from the compressed state to the original state by the elastic force, and the inner tooth member 67 and the outer tooth member 69 are re-established. The occlusal fixes the rear handle 40 and the extension rod 20.

As shown in FIG. 9, one shape of the rear handle 40 is provided. In this embodiment, the rear handle 40 includes a third grip portion 44 and a support portion 42. The third grip portion 44 is convenient for the operator to grasp, and the support portion 42 facilitates the operator to lean a part of the arm or the elbow or the wrist. In this embodiment, the third grip portion 44 has a substantially elongated rod shape, one end of the long rod is movably coupled to the second end of the extension rod 20, and the other end of the long rod is coupled to the support portion 42. In this embodiment, the shape of the support portion 42 appears as a recess, such as a groove, a dimple or a concave arc. In this embodiment, the support portion 42 is specifically a recess formed by the first arcuate wall 421 and the second arcuate wall 422. Preferably, the connection between the support portion 42 and the third grip portion 44 may be set at an angle. As is known to those skilled in the art, the shape of the rear handle 40 is not limited to the example shown in Fig. 8. The shape of the rear handle 40 is only required to enable the operator to grasp and hold the arm or elbow or wrist function.

Referring to FIG. 12 and FIG. 13, an example of how the operator implements the one-hand operation mode and the two-hand operation mode using the lawnmower 100 of the embodiment of the present invention is illustrated. Since the same operation mode is not affected by the grass cutter 100 being in the grassing mode or in the trimming mode, the present invention only illustrates how the operator uses the one-hand operation mode and the two-hand operation only when the lawnmower 100 is in the grassing mode. mode.

As shown in FIG. 12, the operator works with the grass cutter 100 with one hand. The operator holds the second grip portion 34 of the front handle 30 with one hand. The rear handle 40 is adjusted to the illustrated position such that the operator holds the elbow of the front handle 30 just against the support portion 42 of the rear handle 40. By holding the second grip portion 34 and the elbow on the support portion 42, the operator can not only easily lift the lawnmower 100, but also move the lawnmower 100 to the left and right along the cutting plane to work, and also improve the lawnmower. 100 stable during operation Sex. When the operator operates with one hand, the arm or elbow of the hand holding the lawnmower leans against the support portion 42, thereby reducing the operator's ability to hold the lawnmower and improving the comfort of the arm during the grassing process. The rear handle 40 can pivot about a pivot axis 61 of a longitudinal direction of the vertically extending rod 20, and the operator can freely adjust the position of the rear handle 40 according to his height or habit, etc., and adjust the rear handle 40 to the most comfortable one-hand operation mode. s position.

As shown in FIG. 13, the operator uses the grass cutter 100 to work with both hands. The operator holds the first grip portion 32 of the front handle 30 with one hand. The rear handle 40 is adjusted to the illustrated position such that the second hand of the operator holds the third grip 44 of the rear handle 40 in the most comfortable position. The operator holds the first grip portion 32 with one hand and the third grip portion 44 with the other hand. The operator can easily lift the lawnmower 100 and move the lawnmower 100 to the left and right along the cutting plane to operate. In another preferred mode of operation, the wrist of the hand holding the third grip portion 44 by the operator can rest on the support portion 42 to make himself more comfortable during the grassing process. The rear handle 40 is pivotable about a pivot shaft 61 extending substantially perpendicularly to the longitudinal direction of the rod 20. The operator can freely adjust the position of the rear handle 40 according to his height or preference, and adjust the rear handle to the most comfortable position for his hands. .

Since both the start switch 70 and the safety switch 72 are disposed at the front handle 30, the operator can conveniently control the start and stop of the grass cutter 100 whether the single-handed operation of the lawnmower 100 or the two-hand operation of the lawnmower 100.

In the embodiment of the present invention, the rear handle 40 can be adjusted in a plurality of positions by rotating about the pivot shaft 61, so that the operator can freely select the one-hand operation mode or the two-hand operation mode. As known to those skilled in the art, if the lawnmower 100 only needs to implement the one-hand operation mode, the rear handle 40 is fixedly coupled to the second end of the extension rod. The specific structure is still as shown in FIG. 5, the rear handle 40 is in the first position, and the connection between the rear handle 40 and the second end of the extension rod is a fixed connection, that is, there is no longer a rotation axis between the rear handle 40 and the second end of the extension rod. 61 and locking mechanism 60. Similarly, if the lawnmower 100 only needs to implement the two-hand operation mode, the rear handle 40 is in the second position as shown in FIG. 7, and the connection of the rear handle 40 and the second end of the extension rod is a fixed connection. In this embodiment, the structural arrangement of the front handle 30 and the rear handle 40 is still the same as that of the above embodiment, except that the rear handle 40 is no longer rotated, but is fixed at a certain position, and only one-hand operation or two-hand operation is separately implemented. the way.

Another embodiment of the lawnmower 100 is shown in Figures 14 and 15. In this embodiment, the front handle 30 and the rear handle 40 are fixedly coupled into a handle assembly 3040. The relative position of the front handle 30 and the rear handle 40 is fixed. The handle assembly 3040 is movably coupled to the second end of the extension rod 20 and pivots about a pivot axis 61 that extends substantially longitudinally of the vertical extension rod 20 to change the relative extension of the handle assembly 3040. 20 positional relationship. By adjusting the position of the handle assembly 3040, the operator freely selects a one-hand operation position (first position) suitable for himself as shown in FIG. 14 or a self-hand operation position (second position) as shown in FIG. As is known to those skilled in the art, the first and second positions of the handle assembly 3040 defined herein are adjustable, i.e., the handle assembly 3040 is releasably locked in a plurality of first and second positions. A locking mechanism 60 is disposed at the junction of the handle assembly 3040 and the second end of the extension rod 20. The specific structure and operation mode of the locking mechanism 60 are similar to the embodiments described above, and are not described herein again.

The present invention is not limited to the specific embodiment structures, and the structures based on the inventive concept are all within the scope of the present invention.

Claims

A lawnmower comprising:

a longitudinally extending extension rod, the extension rod is provided with a first end and a second end opposite to the first end in the longitudinal direction;

a working head that is coupled to the first end of the extension rod;

a handle assembly for an operator to operate, the handle assembly including a first handle and a second handle coupled to the second end of the extension rod;

Characterizing in that the second handle includes at least one operating position, the at least one operating position including positioning the second handle in a first position that provides support for an operator's arm or elbow, The second handle cooperates with the first handle in a first position for one-handed operation, the grassing machine having a grassing state and a trimming state under one-handed operation.
The lawnmower according to claim 1, wherein the handpiece comprises a casing, a motor disposed in the casing, and a cutting member driven by the motor, the cutting member rotating to form a cutting plane When the lawnmower is in the trimming state and the second handle is in the first position, the cutting plane is parallel to the direction in which the operator faces.
The lawnmower of claim 2 wherein the projection of the first handle on the ground is parallel or collinear with the projection of the extension rod on the ground.
The lawnmower according to claim 3, wherein a cross section of the first handle in the axial direction of the extension rod is parallel or common to the cutting plane when the lawnmower is in a trimming state. surface.
The lawnmower according to claim 1, wherein the lawnmower comprises a slider or a rolling member that supports the lawnmower in a trimming state.
The lawnmower according to claim 5, wherein the rolling member comprises at least one trimming roller, when the lawnmower is in a trimming state, and the second handle is in the first position, The rolling direction of the trimming roller is consistent with the direction in which the operator faces.
The lawnmower according to claim 6, wherein when the lawnmower is in a trimming state, the trimming roller has a radial cross section parallel to the axial cross section of the extension rod or Coplanar.
The lawnmower according to claim 1, wherein the nose is arranged to be rotated by a predetermined angle with respect to the extension rod in a radial direction of the extension rod to realize the repair of the nose The transition between the edge state and the grass state.
The lawnmower of claim 1 wherein said handpiece includes a shroud and said A pivot portion connected to the first end of the extension rod, the extension rod being selectively rotatable about the pivot portion in a direction away from the shroud or in a direction toward the shroud.
The lawnmower according to claim 1, wherein the extension rod is a telescopic rod.
The lawnmower of claim 1 wherein said first handle includes a ring portion that closes a second end of said extension rod, said ring body portion including a first grip portion for an operator to grip When the second handle is in the first position of the one-hand operation, the angle formed by the first grip portion and the second handle is greater than or equal to 90 degrees and less than or equal to 140 degrees.
The lawnmower according to claim 1, wherein when the second handle is in the first position under one-hand operation, the angle formed by the operator's arm and the ground is greater than or equal to 90 degrees, and less than or equal to 140 degrees.
The lawnmower of claim 1 wherein said at least one operating position comprises a second handle adjustable for a second position for gripping by an operator, said second handle being in a second position Cooperating with the first handle to realize two-hand operation, the second handle is formed with a second angle in a direction of the second position and the extension rod toward the first end, and the second angle is an acute angle The second handle is formed with a first angle in a first position and a direction of the extension rod toward the first end, the first angle being an obtuse angle.
A lawnmower according to claim 13 wherein said at least one operating position comprises a second handle disposed in a third position such that said lawnmower is in a stored state, said second handle being in a third position The position is formed with a third angle in a direction of the extension rod toward the first end, and the degree of the third angle is less than the degree of the second angle.
The lawnmower according to claim 14, wherein the first, second, and third positions of the second handle are adjustable, and the second handle is releasably locked in the plurality of One position, second position, and third position.
A lawnmower according to claim 14, wherein said lawnmower further comprises a locking mechanism for controlling said second handle for adjustment of an operating position, said locking mechanism causing said second handle to be Any one of the operational positions of the at least one operational position is locked and released for adjustment at any of the operational positions.
A lawnmower according to claim 16, wherein said second handle comprises two extension portions opposite to each other coupled to the locking mechanism and a support portion connecting the two extension portions, when said second When the handle is in the first position, the first handle is held by the operator with one hand, and the support portion of the second handle is for the operator's arm or elbow to lean to achieve one-hand operation; Handle position In the second position, the first handle and the second handle are correspondingly held by the operator's hands to achieve two-hand operation.
The lawnmower according to claim 17, wherein the support portion is an arc-shaped recess for the operator's arm or elbow to lean against.
A lawnmower according to claim 2, wherein said lawnmower further comprises an energy unit for providing energy to the handpiece, said energy unit being a battery pack.
The lawnmower according to claim 19, wherein said battery pack is disposed at one side of said first handle.
The lawnmower according to claim 19, wherein said battery pack and said motor are respectively located at said first end and said second end opposite said extension rod.
The lawnmower according to claim 19, wherein said motor comprises a percentage of said grass cutter weight less than said battery pack as a percentage of said grass cutter weight.
A lawnmower according to claim 19, wherein the ratio of the weight of the handpiece attached to the first end of the extension rod to the total weight of the handle assembly and the battery pack attached to the second end of the extension rod is 1:0.7 to 3:7.
The lawnmower according to claim 1, wherein the grass cutter has a weight of less than 2.8 kg.
The lawnmower according to claim 19, wherein the center of gravity of the lawnmower is located on a side of the extension rod adjacent to the battery pack.
The lawnmower according to claim 1, wherein a vertical distance between the projection of the center of gravity of the lawnmower on the ground and the projection of the center position of the first handle on the ground is 10 to 50 cm.
A lawnmower comprising:

a longitudinally extending extension rod, the extension rod is provided with a first end and a second end opposite to the first end in the longitudinal direction;

a working head that is coupled to the first end of the extension rod;

a handle assembly for an operator to operate, the handle assembly including a first handle and a second handle coupled to the second end of the extension rod;

Characterizing in that the second handle includes at least one operating position, the at least one operating position including positioning the second handle in a first position that provides support for an operator's arm or elbow, The second handle cooperates with the first handle in the first position to achieve one-hand operation, and the angle between the arm of the operator supported and the direction of the extension rod toward the first end is 90 degrees. ~180 degrees.
The lawnmower according to claim 27, wherein the angle between the arm supported by the operator and the extension rod is 120 to 150 degrees.