Electric tool

Abstract

The utility model discloses an electric tool. The electric tool comprises a tool main body, a holding part, a trigger, a locking switch and a locking retainer, wherein the locking retainer is arranged to apply a locking force to the locking switch, and the locking force enables the locking switch to be in a locking state; wherein in the process that the locking switch is operated to be switched from the locking state to the unlocking state, the locking force changes from large to small. By arranging the locking retaining piece, the locking switch can be pressed only after overcoming locking force, and the safety requirement is met; moreover, in the process that the locking switch is operated to be switched from the locking state to the unlocking state, the locking force changes from large to small, and the good user experience feeling is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to a garden tool, in particular to an electric tool. BACKGROUND

[0002] Chain saw is a common handheld garden tool, which is widely used with the increase of private and public green areas. At present, chain saws mostly use electric energy as power source. The motor in the chain saw can drive the chain to rotate around the guide plate, and then the staggered L-shaped blades on the chain cut the wood or branches.

[0003] At present, chain saws usually have a trigger switch on the handle gripped by the user. However, when using the chain saw, the trigger switch may be pressed unintentionally, causing abnormal start of the chain saw when the user only needs to hold it but not use it, thus causing danger. For this reason, a safety switch is provided in the related art to prevent accidental actuation of the trigger switch. However, the safety switch needs to meet the safety requirement of greater than or equal to 20N, that is, the safety switch needs to be pressed under the action of a force greater than or equal to 20N, resulting in poor user experience.

[0004] This part provides background information related to the present application, which may not be prior art. CONTENT OF THE UTILITY MODEL

[0005] One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, one object of the present application is to provide an electric tool.

[0006] In order to achieve the above object, the present application adopts the following technical solution:

[0007] An electric tool, comprising:

[0008] a tool body;

[0009] a holding portion;

[0010] a trigger, operably mounted on the holding portion;

[0011] a lock switch, operably mounted on the holding portion, the lock switch having a locked state in which the trigger is prohibited from being triggered and an unlocked state in which the trigger is allowed to be triggered;

[0012] a lock holding member configured to apply a locking force to the lock switch to make the lock switch in the locked state;

[0013] wherein the locking force changes from large to small during the process that the lock switch is operated from the locked state to the unlocked state.

[0014] In some embodiments, the locking force applied by the locking retaining member to the locking switch continuously decreases if the locking switch is continuously operated.

[0015] In some embodiments, the locking force can resist an instantaneous force of at least 20 N.

[0016] In some embodiments, the locking retaining member comprises a magnetic member.

[0017] In some embodiments, the locking retaining member comprises a first magnetic member mounted on the holding portion and a second magnetic member mounted on the locking switch.

[0018] In some embodiments, the locking switch comprises a first mounting portion rotatably mounted in the holding portion.

[0019] In some embodiments, the locking switch further comprises a second mounting portion, and the electric power tool further comprises an elastic member, one end of which is connected to the second mounting portion and the other end of which is mounted in the holding portion.

[0020] In some embodiments, the locking switch further comprises a third mounting portion configured to mount the second magnetic member.

[0021] In some embodiments, the trigger trigger comprises a first locking portion configured to be locked with a second locking portion on the locking switch.

[0022] In some embodiments, the locking switch and the trigger are respectively arranged at two positions opposite to each other on the holding portion.

[0023] The present application has the advantages of:

[0024] The present application provides an electric power tool, by arranging a locking retaining member, the locking switch can be pressed only after overcoming the locking force, meeting the safety requirements; and during the process of switching the locking switch from the locked state to the unlocked state, the locking force changes from large to small, ensuring a better user experience. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic diagram of a chain saw provided by the present application;

[0026] Figure 2 is a structural schematic diagram of a holding portion in a locked state of a locking switch according to an embodiment of the present application;

[0027] Figure 3 is a structural schematic diagram of a holding portion in a state of waiting for unlocking of a locking switch according to an embodiment of the present application;

[0028] Figure 4 is a structure diagram of the holding part in the unlocking state of the locking switch in the first embodiment of the present application;

[0029] Figure 5 is a structure diagram of the first and second locking parts when the locking switch is in the locking state in the first embodiment of the present application;

[0030] Figure 6 is a structure diagram of the first and second locking parts when the locking switch is in the unlocking state in the first embodiment of the present application;

[0031] Figure 7 is a structure diagram of the holding part in the locking state of the locking switch in the second embodiment of the present application;

[0032] Figure 8 is a structure diagram of the holding part in the unlocking state of the locking switch in the second embodiment of the present application;

[0033] Figure 9 is a structure diagram of the holding part when the first and second locking switches are in the locking state in the third embodiment of the present application;

[0034] Figure 10 is a structure diagram of the holding part when the first and second locking switches are in the unlocking state in the third embodiment of the present application.

[0035] In the drawings:

[0036] 100, chain saw;

[0037] 10, tool body; 11, housing; 111, handle; 1111, holding part; 12, chain; 13, guide plate; 141, limiting guide part; 142, rotating support part; 15, elastic member mounting part; 151, first elastic member mounting part; 152, second elastic member mounting part;

[0038] 20, power supply device;

[0039] 30, trigger trigger; 301, first locking part; 302, accommodating cavity;

[0040] 40, locking switch; 401, second locking part; 4011, first step surface; 4012, second step surface; 402, first mounting part; 403, second mounting part; 404, third mounting part; 41, first locking switch; 42, second locking switch; 421, trigger part;

[0041] 50, elastic member; 51, first elastic member; 52, second elastic member;

[0042] 60, locking retainer; 61, first magnetic member; 62, second magnetic member;

[0043] 70, electronic switch; 71, switch portion. DETAILED DESCRIPTION

[0044] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings.

[0045] In this application, the terms "include", "comprise" and "have" or any other variants are intended to cover non-exclusive inclusions, such that processes, methods, articles, or apparatuses that include a series of elements are not limited to those elements, but also include other elements not explicitly listed, or further include elements inherent in such processes, methods, articles, or apparatuses. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0046] In this application, the term "and / or" is a description of an associated relationship between associated objects, which means that there can be three kinds of relationships. For example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this application generally represents a "and / or" relationship between the front and rear associated objects.

[0047] In this application, the terms "connection", "combination", "coupling", "mounting" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, for example, direct connection refers to the connection of two parts or components without the need for an intermediate part, and indirect connection refers to the connection of two parts or components with at least one intermediate part. The two parts or components are connected through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0048] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0049] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0050] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0051] In this application, the terms "controller," "processor," "central processing unit," "CPU," and "MCU" are used interchangeably. When using the unit "controller," "processor," "central processing unit," "CPU," or "MCU" to perform a specific function, unless otherwise stated, these functions may be performed by a single or multiple of the aforementioned units.

[0052] In this application, the terms "device," "module," or "unit" are used to describe devices that can be implemented in hardware or software to perform a specific function.

[0053] In this application, the terms “calculation,” “judgment,” “control,” “determine,” “identify,” etc., refer to the operation and process of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0054] This application provides a power tool, which includes functional elements for realizing its functions. The power tool is a chainsaw 100, and the functional element of the chainsaw 100 is a chain 12.

[0055] To clearly illustrate the technical solution of this application, the following definitions are provided: Figure 1 The up / down and front / back directions are shown.

[0056] like Figure 1 As shown, the chainsaw 100 includes a tool body 10 and a power supply device 20, which provides energy to the tool body 10. The tool body 10 includes a housing 11, a chain 12, a guide plate 13, and a motor (not shown in the figure). One end of the guide plate 13 is supported on the housing 11, and the other end extends forward out of the housing 11 along its longitudinal direction, i.e., in the front-to-back direction. The guide plate 13 supports and guides the chain 12. The motor is disposed within the receiving space formed by the housing 11. The motor is the prime mover of the chainsaw 100, which converts the electrical energy provided by the power supply device 20 into mechanical energy to rotate its own output shaft, and then directly or indirectly drives the chain 12 through a transmission assembly to perform a cutting function around the guide plate 13.

[0057] The power supply unit 20 includes at least one battery pack, which is detachably connected to the housing 11 for easy replacement by the user, thus extending the service life of the chainsaw 100. In some embodiments, the housing 11 has a receiving portion for accommodating the battery pack, which is detachably installed within the receiving portion.

[0058] The housing 11 has a handle 111 extending in the front-rear direction, and the handle 111 has a grip portion 1111 for the user to hold. The handle 111 is located behind the battery pack in the front-rear direction, which makes it easy for the user to hold the handle 111 and conforms to the ergonomic design.

[0059] A trigger 30 is provided on the grip 1111. The trigger 30 is at least partially outside the grip 1111. The trigger 30 is used to control the start and stop of the chainsaw 100. The trigger 30 is positioned reasonably to facilitate user operation and improve user comfort.

[0060] The grip 1111 is also equipped with a locking switch 40, which is a safety switch used to prevent accidental activation of the trigger 30.

[0061] In some embodiments, such as Figures 2 to 8 As shown, there is one locking switch 40, and the locking switch 40 and the trigger 30 are respectively located at two opposite positions on the grip 1111.

[0062] In some embodiments, such as Figures 2 to 4As shown, the locking switch 40 has a locked state, a pending unlock state, and an unlocked state. When the locking switch 40 is in the locked state, the locking switch 40 is interlocked with the trigger 30, and the trigger 30 cannot be operated at this time. (Refer to...) Figure 2 When the locking switch 40 is operated in a first direction X, substantially parallel to the extending direction of the grip portion 1111, the locking switch 40 changes from a locked state to an unlocked state. At this time, the trigger 30 is still not allowed to be operated. (Refer to...) Figure 3 When the locking switch 40 is operated in the second direction Y, the locking switch 40 changes from the unlocked state to the unlocked state, at which point the trigger 30 can be operated, as shown in the reference. Figure 4 In some embodiments, the second direction Y is substantially perpendicular to the first direction X.

[0063] By setting a pending unlock state between the locked and unlocked states, the locking switch 40 must first be pushed to the pending unlock state along the first direction X before it can be pressed to the unlock state along the second direction Y. This ensures that the locking switch 40 cannot be pressed when locked, meeting the safety requirement of ≥20N while also guaranteeing a better user experience. In some embodiments, when the locking switch 40 is moved a distance greater than or equal to 0.5mm along the first direction X, the locking switch 40 changes from the locked state to the pending unlock state.

[0064] Continue to refer to Figures 2 to 4 The locking switch 40 is at least partially exposed outside the grip portion 1111, and the portion of the locking switch 40 exposed outside the grip portion 1111 is fin-shaped to meet the user's usage habits.

[0065] Continue to refer to Figures 2 to 4 and combined Figures 5 to 6 The trigger 30 includes a first locking part 301 and a receiving cavity 302. The first locking part 301 is configured to lock with a second locking part 401 on the locking switch 40. Specifically, when the locking switch 40 is in the locked state, the first locking part 301 and the second locking part 401 are locked together. In some embodiments, the second locking part 401 has a stepped structure, including a first stepped surface 4011 and a second stepped surface 4012. Along the second direction Y (i.e., the vertical direction of the chainsaw 100), the second stepped surface 4012 is closer to the trigger 30 than the first stepped surface 4011, that is, the second stepped surface 4012 is lower than the first stepped surface 4011. When the locking switch 40 is in the locked state, the first stepped surface 4011 abuts against the upper end surface of the first locking part 301, and the connecting surface between the first stepped surface 4011 and the second stepped surface 4012 abuts against the side end surface of the first locking part 301. Figure 5When the locking switch 40 is operated along the first direction X, the second locking part 401 moves a certain distance along the first direction X accordingly. During this movement, the first stepped surface 4011 remains in contact with the first locking part 301. When the locking switch 40 is switched to the unlocking state, the edge of the first stepped surface 4011 contacts the first locking part 301. At this time, the trigger 30 cannot be triggered due to the restriction of the first stepped surface 4011. (Refer to...) Figure 6 When the locking switch 40 is operated in the second direction Y, the first stepped surface 4011 disengages from the first locking part 301, that is, the first locking part 301 and the second locking part 401 are released from interlocking. The second locking part 401 is then housed in the receiving cavity 302 of the trigger body, at which point the trigger 30 can be actuated. Of course, the interlocking form of the first locking part 301 and the second locking part 401 is not limited to this.

[0066] Continue to refer to Figures 2 to 4 The locking switch 40 includes a first mounting portion 402 and a second mounting portion 403. The first mounting portion 402 is movably mounted within the grip portion 1111, and the second mounting portion 403 is movably mounted within the grip portion 1111. The first mounting portion 402 enables the locking switch 40 to be operated along a first direction X and a second direction Y. In some embodiments, the first mounting portion 402 is a hole-like structure, and a limiting guide portion 141 is provided within the grip portion 1111. The limiting guide portion 141 is located within the hole-like structure, and the dimension of the hole-like structure along the first direction X is larger than the dimension of the limiting guide portion 141 along the first direction X. Thus, the locking switch 40 can move along the first direction X under the guidance of the hole-like structure and the limiting guide portion 141, and the moving distance of the locking switch 40 is determined by the dimension of the hole-like structure along the first direction X. Furthermore, the locking switch 40 can also rotate around the limiting guide portion 141, enabling it to be operated along the second direction Y. The second mounting part 403 is used to mount the elastic element 50. One end of the elastic element 50 is connected to the second mounting part 403, and the other end is mounted on the elastic element mounting part 15 inside the grip part 1111. The elastic element 50 is used to provide the force required for the locking switch 40 to reset. When the locking switch 40 is operated along the first direction X and the second direction Y, the elastic element 50 will elastically deform. When the locking switch 40 loses the operating force along the first direction X and the second direction Y, the locking switch 40 resets to the locked state under the action of the restoring force of the elastic element 50.

[0067] In some embodiments, such as Figure 7 and Figure 8 As shown, the locking switch 40 only has a locked state and an unlocked state. When the locking switch 40 is in the locked state, the locking switch 40 is interlocked with the trigger 30, and the trigger 30 cannot be operated at this time. (Refer to...) Figure 7When the locking switch 40 is in the unlocked state, the locking switch 40 is disengaged from the trigger 30, and the trigger 30 can be operated at this time, as shown in the reference. Figure 8 Furthermore, it also includes a locking retainer 60, which is configured to apply a locking force to the locking switch 40 to lock it in the locked state. The locking force varies from large to small as the locking switch 40 is operated to switch from the locked state to the unlocked state. By configuring the locking retainer 60, the locking switch 40 can only be pressed after overcoming the locking force, thus meeting safety requirements. In some embodiments, the locking force can withstand a momentary force of at least 20N, i.e., it can withstand the momentary force during safety testing. Moreover, the variation in locking force during the switching of the locking switch 40 from the locked state to the unlocked state ensures a better user experience.

[0068] The force applied to the locking switch 40 by the locking retainer 60 continuously decreases as the locking switch 40 is continuously operated. In some embodiments, the locking retainer 60 includes a magnetic element that may be mounted to the grip portion 1111, and at least the portion of the locking switch 40 opposite the magnetic element is made of a magnetic material; or the magnetic element may also be mounted to the locking switch 40, and at least the portion of the grip portion 1111 opposite the magnetic element is made of a magnetic material. In some embodiments, reference continues to... Figure 7 and Figure 8 The locking retainer 60 includes a first magnetic element 61 mounted on the grip portion 1111 and a second magnetic element 62 mounted on the locking switch 40. The first magnetic element 61 and the second magnetic element 62 attract each other to apply a locking force to the locking switch 40.

[0069] Continue to refer to Figure 7 and Figure 8 The trigger 30 includes a first locking part 301 and a receiving cavity 302. The first locking part 301 is configured to lock with a second locking part 401 on the locking switch 40. Specifically, when the locking switch 40 is in the locked state, the first locking part 301 and the second locking part 401 are locked together. The receiving cavity 302 is configured to receive the second locking part 401 when the locking switch 40 is pressed (moved along the second direction Y).

[0070] Continue to refer to Figure 7 and Figure 8The locking switch 40 includes a first mounting portion 402, a second mounting portion 403, and a third mounting portion 404. The first mounting portion 402 is movably mounted within the grip portion 1111, the second mounting portion 403 is movably mounted within the grip portion 1111, and the third mounting portion 404 is movably mounted within the grip portion 1111. The first mounting portion 402 allows the locking switch 40 to be operated by pressing (i.e., operated along the second direction Y). In some embodiments, the first mounting portion 402 is a hole-like structure, and a rotating support portion 142 is provided within the grip portion 1111. The hole-like structure is rotatably connected to the rotating support portion 142, and when the locking switch 40 is operated by pressing, the locking switch 40 rotates around the rotating support portion 142. The second mounting portion 403 is used to mount an elastic element 50. One end of the elastic element 50 is connected to the second mounting portion 403, and the other end is mounted on an elastic element mounting portion 15 inside the grip portion 1111. The elastic element 50 provides the force required for the locking switch 40 to reset. The third mounting portion 404 is configured to mount the second magnetic element 62. In some embodiments, the third mounting portion 404 is provided with a mounting groove, and a portion of the second magnetic element 62 is located within the mounting groove.

[0071] In some embodiments, such as Figure 9 and Figure 10 As shown, there are two locking switches 40, including a first locking switch 41 and a second locking switch 42. The first locking switch 41 and the trigger 30 are respectively located at two opposite positions on the grip 1111, and the second locking switch 42 is located on the same side of the grip 1111 as the trigger 30. The first locking switch 41 has a locked state that prevents the trigger 30 from being triggered and an unlocked state that allows the trigger 30 to be triggered; the second locking switch 42 has an on state that connects the power tool's circuit and an off state that disconnects the power tool's circuit. When the first locking switch 41 is pressed, the trigger 30 can be operated; when the second locking switch 42 is pressed, the electronic switch 70 is closed, and the control circuit inside the power tool is connected. When both the first locking switch 41 and the second locking switch 42 are pressed, after the trigger 30 is operated, the control circuit receives power to start the motor.

[0072] Continue to refer to Figure 9 and Figure 10 The trigger 30 includes a first locking part 301 and a receiving cavity 302. The first locking part 301 is configured to lock with a second locking part 401 on a first locking switch 41. Specifically, when the first locking switch 41 is in the locked state, the first locking part 301 and the second locking part 401 are locked together. The receiving cavity 302 is configured to receive the second locking part 401 when the first locking switch 41 is pressed (moved along the second direction Y).

[0073] The first locking switch 41 includes a first mounting portion 402 and a second mounting portion 403. The first mounting portion 402 is movably mounted within the grip portion 1111, and the second mounting portion 403 is movably mounted within the grip portion 1111. The first mounting portion 402 allows the locking switch 40 to be operated by pressing (i.e., operated along the second direction Y). In some embodiments, the first mounting portion 402 is a hole-like structure, and a rotating support portion 142 is provided within the grip portion 1111. The hole-like structure is rotatably connected to the rotating support portion 142, and when the locking switch 40 is operated by pressing, the locking switch 40 rotates around the rotating support portion 142. The second mounting portion 403 is used to mount a first elastic member 51. One end of the first elastic member 51 is connected to the second mounting portion 403, and the other end is mounted on a first elastic member mounting portion 151 inside the grip portion 1111. The first elastic member 51 provides the force required for the first locking switch 41 to reset.

[0074] Continue to refer to Figure 9 and Figure 10 The second locking switch 42 includes a fourth mounting portion and a trigger portion 421. The fourth mounting portion is used to mount a second elastic member 52. One end of the second elastic member 52 is connected to the fourth mounting portion, and the other end is mounted on the second elastic member mounting portion 152 within the grip portion 1111. The second elastic member 52 is used to provide the force required to reset the second locking switch 42. The trigger portion 421 is used to trigger the switch portion 71 on the electronic switch 70.

[0075] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this application.

Claims

1. A power tool comprising: a tool body (10); a grip portion (1111); a trigger (30) operably mounted on the grip portion (1111); a lock switch (40) operably mounted on the grip portion (1111), the lock switch (40) having a locked state in which the trigger (30) is inhibited from being triggered and an unlocked state in which the trigger (30) is allowed to be triggered; characterized by further comprising: a lock holding member (60) arranged to apply a lock force to the lock switch (40) to bring the lock switch (40) to the locked state; wherein the lock force is varied from large to small during the process in which the lock switch (40) is operated from the locked state to the unlocked state.

2. The power tool of claim 1, wherein, The force applied by the lock holding member (60) to the lock switch (40) continuously decreases in the case that the lock switch (40) is continuously operated.

3. The power tool of claim 1, wherein, The lock force is able to resist an instantaneous force of at least 20 N.

4. The power tool of claim 1, wherein, The lock holding member (60) comprises a magnetic member.

5. The power tool of claim 1, wherein, The lock holding member (60) comprises a first magnetic member (61) mounted on the grip portion (1111) and a second magnetic member (62) mounted on the lock switch (40).

6. The power tool of claim 1, wherein, The lock switch (40) comprises a first mounting portion (402) rotatably mounted in the grip portion (1111).

7. The power tool of claim 1, wherein, The lock switch (40) further comprises a second mounting portion (403), and the power tool further comprises a resilient member (50), one end of the resilient member (50) being connected to the second mounting portion (403) and the other end being mounted in the interior of the grip portion (1111).

8. The power tool of claim 5, wherein, The lock switch (40) further comprises a third mounting portion (404) arranged to mount the second magnetic member (62).

9. The power tool of claim 1, wherein, The trigger (30) comprises a first locking portion (301) arranged to be interlocked with a second locking portion (401) on the lock switch (40).

10. The power tool of claim 1, wherein, The lock switch (40) and the trigger (30) are respectively arranged at two positions opposite to each other on the grip portion (1111).

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