power tools

Abstract

This utility model relates to a power tool, including a housing, a receiving cavity enclosed by the housing, a trigger assembly at least partially located within the receiving cavity, and a locking assembly for restricting the movement of the trigger assembly. The trigger assembly has a locked position and a released position. When the trigger assembly is in the locked position, the power tool cannot be started; when the trigger assembly is in the released position, the power tool is in the started state, the trigger assembly moves around a first axis, and the locking assembly moves around a second axis. The angle between the first axis and the second axis is greater than or equal to 60° and less than or equal to 80°. The angle between the trigger assembly and the locking assembly of the power tool of this utility model is designed to be between 60° and 80°, which is beneficial for foolproof assembly of the power tool and improves the operating comfort of the locking assembly, making it more ergonomic.

Description

Technical Field

[0001] This utility model relates to an electric tool, and more particularly to an electric tool that is highly safe and comfortable to operate. Background Technology

[0002] Safety is paramount when using power tools on the market. Power tools are typically controlled by a trigger to start or stop; pressing the trigger starts the machine. However, users may accidentally trigger the trigger, causing the power tool to start unintentionally. This could result in injury to the user or damage to the workpiece, seriously affecting work safety. Furthermore, the locking mechanism on most power tools, which interlocks with the trigger, protrudes vertically from the casing. This can lead to awkward force application and damage to the locking mechanism.

[0003] In view of the above problems, it is indeed necessary to provide a power tool to overcome the shortcomings of the prior art. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an electric tool that can improve the user's safety and operating comfort.

[0005] The present invention solves the existing technical problems by adopting the following technical solution: an electric tool, comprising a housing extending axially, a receiving cavity enclosed by the housing, a trigger assembly located at least partially within the receiving cavity, and a locking assembly for restricting the movement of the trigger assembly; the trigger assembly has a locked position and a released position, wherein when the trigger assembly is in the locked position, the electric tool cannot be started; when the trigger assembly is in the released position, the electric tool is in the started state; the trigger assembly moves about a first axis, and the locking assembly moves about a second axis, wherein the angle between the first axis and the second axis is greater than or equal to 60° and less than or equal to 80°.

[0006] A further improvement is as follows: the locking assembly includes a pressing part located on the side of the housing, the housing includes an opening for the pressing part to protrude to the outside of the housing, the opening extends obliquely and the angle between its extension direction and the movement direction of the pressing part is an acute angle.

[0007] A further improvement is as follows: the power tool includes a grip portion, an enlarged portion, and a transition portion located between the grip portion and the enlarged portion, the transition portion being configured as a continuous inclined surface, and the opening extending to the transition portion and extending inclinedly with the transition portion.

[0008] A further improvement is that the portion of the pressing part that protrudes from the opening gradually decreases in size from back to front along the axial direction.

[0009] A further improvement is as follows: the locking assembly includes a mating part connected to the pressing part and an intermediate post located between the pressing part and the mating part, wherein the axis of the intermediate post is the second axis.

[0010] A further improvement is as follows: the locking assembly includes a clamping member for restricting the movement of the intermediate post. The clamping member is located on the side of the intermediate post away from the housing. Both ends of the clamping member are provided with through holes for fixing to the housing by screws. The intermediate post is located in the area between the two through holes.

[0011] A further improvement is as follows: the power tool includes a connecting assembly located at least partially within the receiving cavity, and the clamping member includes a notch located between the two through holes, the notch extending along the direction of movement of the connecting assembly to form a clearance channel.

[0012] A further improvement is as follows: the trigger assembly includes an abutment portion that mates with the mating portion and a trigger portion connected to the abutment portion. The abutment portion includes an arc-shaped body extending along a curved surface from the trigger portion and a groove located on the side of the arc-shaped body near the mating portion. The mating portion includes a body connected to the intermediate post and a protrusion extending outward from the body, the protrusion mates with the groove.

[0013] A further improvement is as follows: a first elastic element is fixed to the side of the mating part near the housing, the first elastic element abuts against the inner wall of the housing, and the pressing part is reset through the first elastic element.

[0014] A further improvement is as follows: the trigger assembly includes an operating part located at least partially outside the housing, a second elastic element is fixed on the operating part, the second elastic element abuts against the connecting assembly, and the operating part is reset through the second elastic element.

[0015] Compared with the prior art, the present invention has the following advantages: the locking component of the power tool of the present invention moves around the second axis, the trigger component moves around the first axis, and the included angle between the two axes is designed to be greater than or equal to 60° and less than or equal to 80°, which is conducive to the foolproof assembly of the power tool and can improve the operating comfort of the locking component; in addition, the movement direction of the locking component is consistent with the direction of the user's force, which is more in line with ergonomic design. Attached Figure Description

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the structure of the power tool of this utility model;

[0018] Figure 2 yes Figure 1 A partial enlarged view of the main handle of the power tool shown;

[0019] Figure 3 yes Figure 2 The diagram shows the internal structure of the main handle;

[0020] Figure 4 yes Figure 3 The diagram shows the structure of the locking component.

[0021] Figure 5 yes Figure 3 The diagram shows the structure of the trigger assembly.

[0022] Figure 6 yes Figure 3 The diagram shown illustrates the trigger assembly in the locked position.

[0023] Figure 7 yes Figure 3 The diagram shown illustrates the trigger assembly in the released position.

[0024] Meaning of the reference numerals in the diagram:

[0025] 100 power tools, 10 working components

[0026] Connection component 20 Main handle 30

[0027] 31 Housing 32

[0028] Trigger assembly 40 Operating unit 41

[0029] Triggering part 42, Abutting part 43

[0030] Groove 431 Locking component 50

[0031] Pressing part 51, mating part 52

[0032] Protrusion 521, Intermediate column 53

[0033] Clamping part 54, through hole 55

[0034] Notch 56, micro switch 60

[0035] First elastic element 70; Second elastic element 80

[0036] Power supply component 90 First axis L1

[0037] Second axis L2 extension direction L3

[0038] Direction of motion L4 Detailed Implementation

[0039] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. In the following description, reference is made to the accompanying drawings, which illustrate several embodiments of the invention. It should be understood that other embodiments may also be used, and changes in mechanical composition, structure, electrical, and operation may be made without departing from the spirit and scope of the invention.

[0040] Although the terms first, second, etc., are used herein to describe various elements in some embodiments, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise.

[0041] For example, the terms "upper," "lower," "front," and "back" used below, which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of facilitating the description of this utility model and simplifying the description, and do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] Please refer to Figure 1 The diagram shows the structure of the power tool 100 of this utility model. The power tool 100 of this utility model can be a lawnmower or brush cutter, etc. The power tool 100 includes a working component 10, a connecting component 20 connected to the working component 10 at one end, a main handle 30 connected to the other end of the connecting component 20, and an auxiliary handle disposed on the connecting component 20.

[0043] The working component 10 is located at the front end of the power tool, and the working component 10 includes a cutting component, such as a grass cutter or brush cutter blade, and the working component 10 also includes a motor component for driving the cutting component and a fan component for cooling the motor component.

[0044] The motor assembly is located inside the front end housing and is fixed to the base of the front end housing via a motor stator bracket. In other embodiments, the front end housing also includes a reduction gear assembly that is connected to the motor assembly in a transmission manner. The motor stator bracket is directly connected to the reduction gear assembly, and the reduction gear assembly is directly fixed to the base of the front end housing via screws. That is, the motor stator bracket is indirectly fixed to the front end housing. Therefore, whether the motor stator bracket is directly or indirectly fixed to the front end housing, it is within the protection scope of this utility model.

[0045] The front head shell of the power tool 100 is a split design, which includes an upper shell and a lower shell. The two shells are fixedly connected by screws. The motor assembly is located in the receiving cavity formed by the two shells. When the user assembles the front head shell, the upper and lower shells fixed by screws are first separated, and then the motor stator bracket is placed into the receiving cavity from the open end of the lower shell. The motor stator bracket is then fixed to the bottom of the lower shell by screwing downwards.

[0046] In an embodiment of this utility model, the power tool 100 further includes a fan assembly located inside the front head shell. The fan assembly is located above the motor assembly and connected to the drive shaft of the motor assembly. The fan assembly rotates together with the drive shaft. When the motor assembly rotates at high speed, the fan assembly is used to dissipate heat from the motor assembly. Specifically, the fan assembly is an axial fan, which is used to draw cooling airflow to the top of the motor assembly to dissipate heat from top to bottom inside the motor assembly.

[0047] In addition, a centrifugal fan is provided between the front end head shell and the cutting assembly to exhaust the cooling airflow inside the front end head shell outside the shell; in other embodiments, the centrifugal fan blades for exhausting the cooling airflow are located on the top of the shell of the cutting assembly, and the cutting assembly is connected to the drive shaft of the motor assembly. Therefore, when the motor assembly rotates at high speed, the centrifugal fan blades on the cutting assembly also rotate together to exhaust the cooling airflow from the front end head shell. The above situation also falls within the protection scope of this utility model.

[0048] The connecting assembly 20 includes a first connecting pipe and a second connecting pipe. The connecting assembly 20 extends axially. The first connecting pipe is connected to the working assembly 10, and the second connecting pipe is connected to the main handle 30. A connector is provided between the first connecting pipe and the second connecting pipe to connect the two connecting pipes. The two connecting pipes can be folded to facilitate the storage of the power tool.

[0049] The first connecting pipe of the connecting assembly 20 is connected to the front end housing of the working assembly 10. The front end housing includes an outwardly extending connecting portion. The first connecting pipe is connected to the connecting portion. In addition, several air inlets are provided below the first connecting pipe to allow external airflow to enter the first connecting pipe and then enter the front end housing through the connecting portion to cool the motor assembly inside the front end housing.

[0050] The auxiliary handle is located on the second connecting tube, and a horizontal protective bar is also fitted on the left side of the auxiliary handle to prevent injury to the user during use. The auxiliary handle is designed as a D-shaped handle, but in other embodiments it can also be a U-shaped handle, etc. The auxiliary handle is fixed to the second connecting tube of the connecting assembly 20 by screws or other fasteners to assist the user in operation and reduce the user's workload.

[0051] The power tool also includes a main handle 30, which is located at the rear end of the auxiliary handle. The main handle 30 cooperates with the auxiliary handle to allow the user to operate with both hands during use, avoiding tilting or loss of control of the power tool caused by unilateral force. In other embodiments, the auxiliary handle can also be adjusted to control the cutting range of the cutting blade or straw rope. The position where the auxiliary handle contacts the connecting component 20 is also provided with shock-absorbing or cushioning material to improve the operating stability of the power tool 100.

[0052] The power tool 100 also includes a power supply component 90 located at the rear end of the connection component 20. The power supply component 90 includes a battery pack vertically arranged on both sides of the power tool 100 and a battery pack mounting part for mounting the battery pack. The power supply component 90 is located at the rear end of the main handle 30 and is spaced a certain distance from the main handle 30.

[0053] The power supply component 90 is electrically connected to the control component inside the main handle 30 via a cable. The motor component inside the working component 10 is also electrically connected to the control component via the cable. The control component is located inside the rear housing where the power supply component 90 is located.

[0054] In this embodiment, the control component is specifically a PCB board, and the PCB board is placed vertically inside the rear housing; in addition, air inlets and outlets are provided on both sides of the rear housing corresponding to the position of the PCB board to dissipate heat from the PCB board.

[0055] In this embodiment, when the power tool 100 is in operation, the motor assembly and fan assembly located at the front end of the tool 100 rotate together. The fan assembly is used to dissipate heat from the motor assembly. Under the negative pressure of the front working component, a small portion of the external airflow enters the housing 31 from the air inlet and flows to the front head shell of the working component 10 through the connecting component 20. The other portion flows out of the housing 31 from the air outlet. The PCB board is located between the air inlet and the air outlet and dissipates heat on its own. In other embodiments, a fan is provided near the PCB board for heat dissipation.

[0056] Please see Figure 2As shown, the main handle 30 of the power tool 100 includes a housing 31 that extends axially and is a two-part housing that encloses the receiving cavity 32. The trigger assembly 40 and the locking assembly 50 are at least partially located within the receiving cavity 32.

[0057] The trigger assembly 40 is located below the housing 31 and at least partially protrudes from the housing 31. The locking assembly 50 is located on the side of the housing 31 and is disposed close to the trigger assembly 40. The trigger assembly 40 is used by the user to start the machine, and the locking assembly 50 is used to restrict the movement of the trigger assembly 40 to prevent the user from accidentally triggering the trigger assembly 40 during use and causing the machine to start unexpectedly.

[0058] When using the power tool, the user must first release the locking component 50 from the trigger component 40 before starting the machine, ensuring user safety. In this embodiment, the locking component 50 and the trigger component 40 are mechanically self-locking, and the locking component 50 is a push-button structure.

[0059] In other embodiments, the locking component 50 may also be a sliding structure, usually located near the switch trigger. In this utility model, the locking form of the locking component 50 is not limited, that is, any structure that can lock the trigger component 40 falls within the protection scope of this utility model.

[0060] Please see Figure 2 and Figure 3 As shown, the trigger assembly 40 includes an operation section 41 for user operation. The operation section 41 is located below the housing 31 and protrudes from the housing 31 so that the user can operate it to start the power tool 100.

[0061] The locking component 50 includes a pressing part 51 located on the side of the housing 31. The pressing part 51 is located close to the operating part 41, which facilitates the user to switch between operating the pressing part 51 and the operating part 41 to ensure the safe start of the power tool.

[0062] The pressing part 51 is operated by the user to limit the displacement of the operating part 41. The housing 31 has an opening corresponding to the position of the pressing part 51. The opening is used to allow the pressing part 51 to protrude to the outside of the housing 31. The opening extends obliquely and the angle between the extension direction L3 of the opening and the movement direction L4 of the pressing part 51 is an acute angle.

[0063] The gap between the opening and the pressing part 51 is 3mm. On the one hand, this makes the opening and the pressing part 51 consistent in appearance, which is beneficial to the aesthetic design. On the other hand, the gap between the opening and the pressing part 51 allows the user to operate the pressing part 51 more smoothly, improving the user's operating comfort and avoiding the user's poor user experience due to jamming or sticking during use.

[0064] The shape of the opening is consistent with the shape of the pressing part 51, that is, the opening surrounds the outer periphery of the part of the pressing part 51 that protrudes from the housing 31. The inclined surface where the opening is located has an extending direction L3. The pressing part 51 moves toward the interior of the housing 31, and the angle α between the extending direction L3 of the inclined surface and the moving direction L4 of the pressing part 51 is an acute angle.

[0065] The power tool 100 includes a grip portion, an enlarged portion, and a transition portion located between the grip portion and the enlarged portion. The transition portion is configured as a continuous inclined surface, and the opening extends to the transition portion and extends obliquely with the transition portion.

[0066] The grip portion is configured as a partial housing 31 for the user to hold, and the operating portion 41 is located below the grip portion; the enlarged diameter portion is configured as a partial housing 31 with a radial dimension perpendicular to the axial direction that is larger than that of the grip portion, and the enlarged diameter portion is provided with an adjustment button for the user to operate to adjust the speed of the power tool; a transition portion is provided between the grip portion and the enlarged diameter portion, which extends continuously along an inclined plane, and the opening extends to the transition portion, and the pressing portion 51 protrudes from the opening, and both the pressing portion 51 and the opening are oriented towards the user for easy operation.

[0067] The portion of the pressing part 51 that protrudes from the opening gradually decreases in size from back to front along the axial direction. The side where the power supply component 90 is located is defined as the rear in the axial direction. The portion of the pressing part 51 that protrudes from the opening is larger the closer it is to the operating part 41. That is, the portion of the pressing part 51 that protrudes from the opening gradually decreases in size in the axial direction away from the operating part 41.

[0068] Please see Figure 4 As shown, the locking assembly 50 further includes a mating portion 52 connected to the pressing portion 51, and an intermediate post 53 located between the pressing portion 51 and the mating portion 52. Both the mating portion 52 and the intermediate post 53 are located within the receiving cavity 32, with the intermediate post 53 extending along the second axis L2, and the mating portion 52 and the pressing portion 51 rotating about the second axis L2.

[0069] The mating part 52 includes a body extending from the side of the intermediate post 53 away from the pressing part 51, the body being connected to the intermediate post 53, and the mating part 52 also includes a protrusion 521 extending outward from the body, the protrusion 521 extending toward the trigger assembly 40, the protrusion 521 being configured as a triangular bevel protruding from the plane of the body.

[0070] The axis of the intermediate column 53 is defined as the second axis L2. The pressing part 51 and the mating part 52 are distributed on both sides of the intermediate column 53. The pressing part 51 and the mating part 52 rotate around the intermediate column 53, and their directions of movement are opposite. In addition, the tangent directions of the movement trajectories of the pressing part 51 and the mating part 52 are both perpendicular to the second axis L2.

[0071] When the user presses the pressing part 51, the pressing part 51 rotates around the second axis L2 and moves toward the inside of the housing 31, that is, toward the direction away from the inner wall of the housing 31. The mating part 52 moves in the opposite direction to the pressing part 51, that is, the mating part 52 moves toward the direction closer to the inner wall of the housing 31.

[0072] Please see Figure 5 As shown, the trigger assembly 40 includes an abutment portion 43 that engages with the mating portion 52. When the user presses the pressing portion 51, the pressing portion 51 moves around the second axis L2 to disengage the mating portion 52 and the abutment portion 43.

[0073] The trigger assembly 40 further includes a trigger portion 42 connected to the abutment portion 43 and an operation portion 41 located at least partially outside the housing 31. The operation portion 41 moves about the first axis L1, and the direction of movement of the operation portion 41 is opposite to the direction of movement of the trigger portion 42.

[0074] The operating part 41 of the trigger assembly 40 moves around the first axis L1, and the pressing part 51 of the locking assembly 50 moves around the second axis L2. The included angle between the first axis L1 and the second axis L2 is greater than or equal to 60° and less than or equal to 80°. This design is beneficial for the foolproof assembly of the power tool, and the movement direction of the locking assembly 50 is consistent with the direction of the user's force, making the user's operation more effortless, comfortable, and ergonomic.

[0075] The abutment portion 43 includes an arc-shaped body extending along a curved surface from the trigger portion 42 and a groove 431 located on the side of the arc-shaped body near the mating portion 52. The groove 431 engages with a protrusion 521 on the mating portion 52 to restrict the movement of the operating portion 41.

[0076] The housing 31 also includes a micro switch 60 located near the trigger 42. When the user presses the operating part 41, the operating part 41 moves around the first axis L1, that is, it moves towards the housing 31. The trigger 42 moves in the opposite direction to the operating part 41. The trigger 42 moves to abut against the micro switch 60 to start the power tool.

[0077] The operating part 41 is fixed with a second elastic element 80, which abuts against the receiving cavity 32. The power tool 100 includes a connecting component 20 located at least partially within the receiving cavity 32. Specifically, the second elastic element 80 abuts against the connecting component 20, and the operating part 41 is reset by means of the second elastic element 80.

[0078] Please see Figure 6 As shown, the trigger assembly 40 is in the initial locked position, and the abutment portion 43 of the trigger assembly engages with the mating portion 52 of the locking assembly 50. Specifically, the groove 431 of the abutment portion 43 engages with the protrusion 521 of the mating portion 52. At this time, the user cannot press the operation portion 41, that is, the operation portion 41 cannot move around the first axis L1. Therefore, the trigger portion 42, which is connected to the opposite end of the operation portion 41 and moves in the opposite direction to the operation portion 41, cannot move. As a result, the trigger portion 42 cannot abut with the micro switch 60, and the power tool cannot be started.

[0079] The locking assembly 50 further includes a clamping member 54 for restricting the movement of the intermediate post 53. The clamping member 54 is located on the side of the intermediate post 53 away from the housing 31. The clamping member 54 has through holes 55 at both ends for fixing to the housing 31 by screws. The intermediate post 53 is located in the area between the two through holes 55.

[0080] The clamping member 54 is used to clamp and fix the intermediate post 53 when the pressing part 51 and the mating part 52 rotate around the second axis L2, preventing the intermediate post 53 from moving up and down. The clamping member 54 is configured as a pressure plate that fits against the intermediate post 53 and protrudes from the intermediate post 53 at both ends. Two screw holes are provided at both ends of the pressure plate to fix the clamping member 54 to the inner wall of the housing 31 by screws.

[0081] The clamping member 54 also includes a notch 56 located between the two through holes 55, the notch 56 extending along the direction of movement of the connecting assembly 20 to form a clearance channel. The connecting assembly 20 is located within the receiving cavity 32. In order to make the layout within the receiving cavity 32 more compact, the design of the parts within the receiving cavity 32 needs to consider the clearance principle to save internal space.

[0082] The clamping member 54 is fixed to the inner wall of the housing 31 by screws, and a notch 56 is formed in the middle to match the shape of the connecting component 20 so that the connecting component 20 can rotate or move freely in the receiving cavity 32. The notch 56 extends along the movement direction of the connecting component 20 to form a clearance channel to avoid the connecting component 20.

[0083] Please see Figure 7 As shown, the trigger assembly 40 is in the released position, that is, when the user wants to start the power tool, he / she must first press the pressing part 51 protruding to the outside of the housing 31, so that the pressing part 51 moves around the second axis L2. Then the mating part 52 connected to the pressing part 51 also moves around the second axis L2, and the movement direction of the mating part 52 is opposite to the movement direction of the pressing part 51. The pressing part 51 moves approximately toward the inside of the housing 31.

[0084] The mating part 52 moves generally toward the inner wall of the housing 31, and a first elastic element 70 is fixed on the side of the mating part 52 near the inner wall of the housing 31. The first elastic element 70 abuts against the inner wall of the housing 31, and the pressing part 51 is reset through the first elastic element 70.

[0085] When the user presses the pressing part 51, the first elastic element 70 abuts against the inner wall of the housing 31. When the user releases the pressing part 51, the pressing part 51 is reset by the first elastic element 70. At this time, the mating part 52 is also reset.

[0086] When the trigger assembly 40 is in the released position, the mating part 52 rotates around the second axis L2 until it disengages from the abutment part 43, and the protrusion 521 on the mating part 52 disengages from the groove 431 on the abutment part 43. The operating part 41 of the trigger assembly 40 can be pressed by the user. At this time, the operating part 41 moves around the first axis L11, the trigger part 42 abuts against the micro switch 60, and the power tool is in the start state.

[0087] The power tool of this invention includes a trigger assembly 40 and a locking assembly 50. By setting these two components, it is ensured that the user can only start the machine when performing a double action, avoiding the risk of accidentally starting the machine and providing user safety.

[0088] The user must first press the pressing part 51 of the locking component 50 to rotate it around the second axis L2, thereby causing the mating part 52 connected to it to move around the second axis L2. This causes the protrusion of the mating part 52 to disengage from the groove 431 of the abutment part 43 of the trigger component 40. Only then can the user press the operating part 41 of the trigger component 40, that is, the operating part 41 can move around the first axis L1 to drive the trigger part 42, which is connected to the operating part 41 and moves in the opposite direction, so that the trigger part 42 abuts against the micro switch 60 located in the receiving cavity 32 of the housing 31 to start the power tool.

[0089] Furthermore, the operating part 41 of the trigger assembly 40 rotates about the first axis L1, which is parallel to the width direction of the housing 31. This facilitates the engagement of the trigger assembly 40 with the screw post inside the housing 31 and improves the smoothness of movement.

[0090] The pressing part 51 of the locking assembly 50 rotates around the second axis L2, and the second axis L2 is designed to be offset by 10°-30° relative to the height direction of the housing 31. That is, the included angle between the first axis L1 and the second axis L2 is in the range of 60-80°. This design not only facilitates the foolproof assembly of the locking assembly 50, but also further improves the operability of the locking assembly 50.

[0091] When the pressing part 51 of the locking component 50 is pressed by the user and rotates about the second axis L2 which is inclined relative to the height direction of the housing 31, the user's pressing experience will be more comfortable.

[0092] When the user presses the handle with their right hand, the direction of force is more convenient and less strenuous, and is angled towards the palm. Therefore, the inclined central column 53 ensures that when the pressing part 51 rotates around the second axis L2 where the central column 53 is located, its rotation direction is consistent with the direction of force applied by the operator's thumb. This ensures that the force-bearing area of ​​the fingers is larger and the friction is relatively smaller during the movement, which is more in line with ergonomic design.

[0093] Currently, all lawnmowers, brush cutters, and brush saws on the market require dual-action start-up; a single grab is not acceptable. The power switch should be an instantaneous switch, stopping immediately upon release. This means the machine cannot be activated by a single grabbing action or linear movement; the self-locking function must be engaged first, followed by activation of the main switch. Some common anti-locking mechanisms allow the machine to start with a single action, and are sometimes called "one-grab" anti-locking mechanisms. While relatively labor-saving and compact, this design does not meet the requirements.

[0094] Therefore, many anti-locking mechanisms have been improved to require "independent pressing" or "independent pushing and pulling" to activate. The anti-locking knob is located on the side or top of the handle, but it must be kept away from the web of the thumb when gripping, so that the thumb can have an independent gripping action that is different from other fingers.

[0095] This utility model integrates the anti-locking switch structure of existing 12V and above handheld lawn mowers / brush cutters / brush saws, and proposes a new dual-action start switch structure to meet safety requirements, while also having the advantages of compact structure and labor-saving use.

[0096] The locking component 50 of the power tool of this invention moves around the second axis L2, and the trigger component 40 moves around the first axis L1. The included angle between the two axes is designed to be greater than or equal to 60° and less than or equal to 80°, which is beneficial for the foolproof assembly of the power tool and can improve the operating comfort of the locking component. In addition, the movement direction of the locking component 50 is consistent with the direction of the force applied by the user, which is more in line with ergonomic design.

[0097] The layout of the trigger assembly 40 and the locking assembly 50 of this utility model is as follows: Figure 1-6 As shown, the trigger assembly 40 consists of an operating part 41, a triggering part 42, and an abutting part 43, etc., and the locking assembly 50 consists of a pressing part 51, a central post 53, and a mating part 52. The operating part 41 of the trigger assembly 40 moves around the first axis L1, and the pressing part 51 of the locking assembly 50 moves around the second axis L2. The angle between the first axis L1 and the second axis L2 is less than or equal to 80° and greater than or equal to 60°. This design ensures that the direction of the force applied by the user when pressing the pressing part 51 is consistent with the direction of movement of the pressing part 51, making the operation less strenuous and more comfortable for the user.

[0098] When assembling the power tool 100, firstly, install the first elastic member 70 on the side of the mating part 52 near the inner wall of the housing 31, press the first elastic member 70 into the corresponding rib of the housing 31, then press the clamping member 54 above the intermediate column 53 and fasten it to the housing 31 with screws.

[0099] Subsequently, the trigger assembly 40 is installed, and the second elastic member 80 is installed at one end of the operating part 41 located inside the housing 31. The second elastic member 80 abuts against the connecting assembly 20. In this embodiment, the connecting assembly 20 is an aluminum tube, that is, the second elastic member 80 abuts against the aluminum tube.

[0100] In the initial position, the abutment portion 43 of the trigger assembly 40 engages with the mating portion 52 of the locking assembly 50. Specifically, the protrusion 521 on the mating portion 52 engages with the groove 431 on the abutment portion 43. When no external force is applied, the trigger assembly 40 of the power tool 100 is locked, and the operating portion 41 cannot be directly pressed to start it.

[0101] When the pressing part 51 is pressed, the mating part 52 rotates around the second axis L2, causing the protrusion 521 on the mating part 52 to disengage from the groove 431 of the abutting part 43. At this time, the operating part 41 can rotate normally around the first axis L1, and the triggering part 42 abuts against the micro switch 60 to trigger the power tool 100.

[0102] In this invention, the rotation axis of the operating part 41 of the trigger assembly 40, namely the first axis L1, is parallel to the horizontal vector in the width direction of the housing 31. This is to better cooperate with the screw post inside the housing 31, so as to improve the smoothness of movement and avoid the user from experiencing jamming or sticking.

[0103] Furthermore, the rotation axis of the locking assembly 50, namely the second axis L2, intersects the vertical vector of the height direction of the housing 31 by 10-30°, that is, the angle between the rotation axis of the trigger assembly 40 and the locking assembly 50 is 60-80°, more specifically, the angle between the first axis L1 and the second axis L2 is 60-80°.

[0104] This design not only facilitates the foolproof assembly of the pressing part 51 and the clamping part 54 in the locking assembly 50, but also further improves the operability of the pressing part 51. When the intermediate post 53 is tilted towards the inside of the housing 31, the user's pressing experience will be more comfortable.

[0105] When the user presses the handle with their right hand and thumb, the direction of force is more efficient and less strenuous, and it is inclined towards the palm. At this time, the middle column 53 is tilted so that the movement direction of the pressing part 51 is consistent with the direction of the thumb force. This ensures that the force-bearing area of ​​the fingers is larger and the friction is relatively smaller during the movement, which is more in line with ergonomic design.

[0106] This utility model is not limited to the specific embodiments described above. The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit it. Those skilled in the art will readily understand that any modifications or changes made to the above embodiments without departing from the spirit and scope of this utility model should still be covered by the claims of this utility model. There are many alternatives to the long-handled power tools of this utility model. The scope of protection of this utility model is determined by the claims.

Claims

1. A power tool comprising an axially extending housing, a receiving cavity defined by the housing, a trigger assembly at least partially located within the receiving cavity, and a locking assembly for limiting movement of the trigger assembly, the trigger assembly having a locked position and a released position, the power tool being inoperable when the trigger assembly is in the locked position, the power tool being in an operable state when the trigger assembly is in the released position; characterized by: The trigger assembly moves about a first axis, and the locking assembly moves about a second axis, wherein the angle between the first axis and the second axis is greater than or equal to 60° and less than or equal to 80°.

2. The power tool according to claim 1, characterized in that: The locking assembly includes a pressing portion located on the side of the housing, the housing including an opening for the pressing portion to protrude to the outside of the housing, the opening extending obliquely and the angle between its extending direction and the movement direction of the pressing portion being an acute angle.

3. The power tool according to claim 2, characterized in that: The power tool includes a grip, an enlarged portion, and a transition portion located between the grip and the enlarged portion, the transition portion being configured as a continuous slope, and the opening extending to the transition portion and extending obliquely with the transition portion.

4. The power tool according to claim 2, characterized in that: The portion of the pressing part that protrudes from the opening gradually decreases in size from back to front along the axial direction.

5. The power tool according to claim 2, characterized in that: The locking assembly includes a mating part connected to the pressing part and an intermediate post located between the pressing part and the mating part, wherein the axis of the intermediate post is the second axis.

6. The power tool according to claim 5, characterized in that: The locking assembly includes a clamping member for restricting the movement of the intermediate post, the clamping member being located on the side of the intermediate post away from the housing, the clamping member having through holes at both ends for fixing to the housing by screws, and the intermediate post being located in the area between the two through holes.

7. The power tool according to claim 6, characterized in that: The power tool includes a connecting assembly located at least partially within the receiving cavity, and the clamping member includes a notch located between the two through holes, the notch extending along the direction of movement of the connecting assembly to form a clearance passage.

8. The power tool according to claim 7, characterized in that: The trigger assembly includes an abutment portion that mates with the mating portion and a trigger portion connected to the abutment portion. The abutment portion includes an arcuate body extending along a curved surface from the trigger portion and a groove located on the side of the arcuate body near the mating portion. The mating portion includes a body connected to the intermediate post and a protrusion extending outward from the body, the protrusion mates with the groove.

9. The power tool according to claim 8, characterized in that: A first elastic element is fixed to the side of the mating part near the housing. The first elastic element abuts against the inner wall of the housing, and the pressing part is reset through the first elastic element.

10. The power tool according to claim 9, characterized in that: The trigger assembly includes an operating part located at least partially outside the housing, a second elastic element fixed to the operating part, the second elastic element abutting against the connecting assembly, and the operating part being reset via the second elastic element.

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