A power tool and an assembly method thereof

Abstract

The application provides an electric tool and an assembling method thereof. The electric tool comprises a handle, a signal switch arranged on the handle and comprising a spring sheet, a first trigger arranged on the handle and rotating around a rotating axis, and a stopper arranged on the handle. When the first trigger is assembled to the handle by moving along the rotating axis, the stopper blocks the first trigger to prevent the first trigger from pressing the spring sheet. The electric tool with the above structure is provided with the stopper on the handle. When the first trigger is assembled to the handle by moving along the rotating axis, the stopper blocks the first trigger in the extending direction of the rotating axis. Since the spring sheet of the signal switch is located on the moving track of the first trigger, the stopper blocks the first trigger to prevent the first trigger from pressing the spring sheet, which avoids the damage of the signal switch during the assembling process, makes the signal switch have good working performance, and does not need to be reworked. Therefore, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of power tool technology, specifically to a power tool and its assembly method. Background Technology

[0002] For example, power tools such as lawn mowers, hair dryers, or lawn trimmers are frequently used in people's daily production and life. However, they have the following disadvantages in the production or use process:

[0003] The components used to control the start, stop, and speed of power tools are a speed control trigger and a signal switch. The speed control trigger rotates and squeezes the spring of the signal switch, causing the spring to trigger the signal switch contacts to control the start and stop. When the speed control trigger is assembled on the handle of the power tool, the signal switch is already assembled. During the assembly process, the speed control trigger is prone to damaging the spring, affecting the working performance or causing rework, reducing production efficiency and increasing production costs.

[0004] Multiple sensors and multiple parts to be detected by the sensors are installed on the handle of the power tool. Under normal working conditions, these sensors and parts are matched one by one. However, during operation, a matching disorder may occur, that is, the sensor detects other parts that are not matched with it, causing the power tool to malfunction.

[0005] The speed control trigger is controlled by turning the handle to start, stop and adjust the speed. In order to ensure the normal operation of the speed control trigger, the opening on the handle for extending the speed control handle needs to have a large area to allow the speed control trigger to rotate a sufficient distance. However, when the speed control trigger returns to the initial position, the large opening will cause the handle to not close tightly, and dust and grass clippings can easily enter the handle and affect the operation of the parts. Summary of the Invention

[0006] In view of this, this application provides a power tool that can avoid damage to the signal switch during assembly, thereby improving production efficiency and reducing production costs. Furthermore, this application also provides an assembly method for this power tool.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A power tool, comprising:

[0009] handle;

[0010] A signal switch is provided on the handle and includes a spring.

[0011] The first trigger is mounted on the handle and rotates about the axis of rotation.

[0012] A stopper is provided on the handle;

[0013] When the first trigger moves along the rotation axis to assemble with the handle, the stop member blocks the first trigger to prevent the first trigger from pressing against the spring.

[0014] Optionally, in the above-mentioned power tools, the first trigger is provided with a stop;

[0015] The stop member has a through hole extending along the rotation direction of the first trigger, and the stop part can extend into the through hole to assemble the first trigger into place.

[0016] Optionally, in the above-mentioned power tool, the stop portion includes:

[0017] The first stop section protrudes from the first trigger parallel to the rotation axis;

[0018] The second stop section is connected to the protruding end of the first stop section and is arranged along the rotation direction of the first trigger, and protrudes from the edge of the first trigger in the indicated rotation direction.

[0019] When the first trigger moves along the rotation axis, the second stop section abuts against the stop member; and when the first trigger rotates, the second stop section enters the through hole.

[0020] Optionally, in the aforementioned power tool, the spring moves within a first region to open and close the signal switch; the second stop section abuts against the stop member in the direction of the rotation axis to allow the first trigger to rotate in the rotation direction to avoid the angle of the first region.

[0021] Optionally, in the above-mentioned power tools, the signal switch is mounted on the handle via a mounting component;

[0022] The first trigger is provided with a first magnetic component, and the mounting component is provided with a first sensor for detecting the magnetic field strength of the first magnetic component.

[0023] Optionally, the aforementioned power tools may also include:

[0024] A second trigger is provided on the handle for locking and unlocking the first trigger;

[0025] A second magnetic component is disposed on the second trigger;

[0026] A shielding element is disposed between the first sensor and the second magnetic element to prevent the first sensor from detecting the magnetic field strength of the second magnetic element.

[0027] Optionally, in the above-mentioned power tools, the mounting component is a mounting plate, wherein:

[0028] The signal switch and the first sensor are disposed on the first plate surface of the mounting plate near the first trigger;

[0029] The shielding element is disposed on the second plate surface of the mounting plate, which is close to the second trigger and parallel to the first plate surface.

[0030] Optionally, in the above-described power tool, the first trigger includes a first portion located within the housing of the handle, and a second portion located outside the housing and connected to the first portion;

[0031] Furthermore, the housing has an opening that allows the second part to extend out, and the first part has a shielding portion that blocks the opening to prevent the first part from being exposed.

[0032] Optionally, in the above-mentioned power tool, the opening is formed on the arc-shaped wall surface of the housing, and the shielding portion includes:

[0033] The curved surface is shielded to match the curved wall surface;

[0034] The first and second shielding sides are located on opposite sides of the shielding arc surface, and together with the shielding arc surface, they shield the opening.

[0035] The sum of the areas of the shielding arc surface, the first shielding side surface, and the second shielding side surface is greater than the area of ​​the opening, so that the shielding part can always shield the opening during the rotation of the first trigger.

[0036] A method for assembling a power tool, applicable to any of the power tools described above, the method comprising the following steps:

[0037] Move the first trigger along the axis of rotation so that the first trigger approaches the handle;

[0038] When the first trigger comes into contact with the stop, the first trigger is rotated in the positive direction around the rotation axis to avoid the stop;

[0039] Continue moving the first trigger along the rotation axis to the assembly position;

[0040] The first trigger is rotated in the opposite direction about the rotation axis to engage with the spring of the signal switch.

[0041] The power tool provided in this application, when assembling a signal switch and a first trigger on the handle, first assembles the signal switch into place, and then assembles the first trigger. The first trigger is assembled by moving it along the rotation axis (this rotation axis refers to the axis along which the first trigger rotates after being assembled on the handle) to approach the handle. During this movement, the first trigger will first come into contact with a stop on the handle, preventing the first trigger from moving further. Since the spring of the signal switch is on the movement trajectory of the first trigger, the stop prevents the first trigger from pressing against the spring, thus avoiding damage to the spring during assembly. The first trigger then continues assembly by avoiding the stop and the spring, and is finally assembled into place. In this power tool, by adding a stop to block the first trigger in the assembly direction (i.e., the direction of the rotation axis), damage to the spring caused by the first trigger pressing against it during assembly can be avoided, ensuring good working performance of the signal switch and the power tool, and eliminating the need for rework. This not only improves the production efficiency of the power tool but also reduces its production cost. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0043] Figure 1 A schematic diagram illustrating the structure of the first trigger, signal switch, second trigger, and handle in the power tool provided in this application;

[0044] Figure 2 A schematic diagram showing the structure of the first trigger, signal switch, second trigger, and controller working together;

[0045] Figure 3 This is a schematic diagram of the first trigger.

[0046] Figure 4 A schematic diagram showing the structure of the signal switch, mounting components, and shielding components.

[0047] exist Figures 1-4 middle:

[0048] 1-Handle, 2-Signal switch, 3-First trigger, 4-Stop, 5-Mounting piece, 6-First sensor, 7-Second trigger, 8-Shielding piece, 9-Controller, 10-Wire, 11-Baffle plate;

[0049] 201-Switch body, 202-Contact, 203-Spring;

[0050] 301-First part, 302-Second part, 303-Mounting hole, 304-Pressure part, 305-Stop part, 306-Mounting groove, 307-Holding part, 308-Shielding part;

[0051] 3051 - First stop section, 3052 - Second stop section;

[0052] 3081 - Blocking curved surface, 3082 - First blocking side, 3083 - Second blocking side. Detailed Implementation

[0053] This application provides a power tool that avoids damage to signal switches during assembly, thereby improving production efficiency and reducing production costs. Additionally, this application also provides a method for assembling this power tool.

[0054] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] like Figures 1-4 As shown, this application provides an embodiment of a power tool, such as a lawnmower, hair dryer, pruning machine, edge trimmer, or mower. The main improved components include a handle 1, a signal switch 2, a first trigger 3, and a stop 4. The handle 1 is the component of the power tool for the user to hold. To facilitate operation, it is equipped with control components such as the first trigger 3, and electronic components such as a controller 9. For ease of arrangement and installation of these components, the handle 1 has a hollow structure, meaning it includes a housing and an installation space enclosed by the housing. In this application, "installed on the handle 1" refers to installation on the housing constituting the handle 1, more specifically, on the inner wall of the housing, so that the installed components are partially or entirely located within the installation space enclosed by the housing. Figure 4 As shown, the signal switch 2 includes a switch body 201, a contact 202, and a spring 203. The contact 202 is disposed on the switch body 201. The spring 203 is made of an elastic and relatively soft material. One end of the spring 203 is connected to the switch body 201, and the other end can move due to the elastic deformation of the spring 203. By moving, the spring 203 tilts relative to the switch body 201 or contacts the contact 202 to be in a released state (i.e., Figure 4The signal switch 2 (shown in the raised state) and the contact point 202 (shown in the squeezed state) are located on the inner wall of the housing and are completely within the installation space. In this application, the signal switch 2 is preferably a normally closed switch, that is, when the power tool is in the working state, the signal switch 2 is in the open state and the switch spring 203 is in the released state. The first trigger 3 can have the function of controlling the start and stop and speed adjustment of the power tool, that is, the first trigger 3 can be a speed-regulating trigger. When it is installed on the housing, that is, after the first trigger 3 is assembled in place on the housing, the first part 301 of the first trigger 3 is located in the installation space. In the middle, the remaining second part 302 extends outside the installation space for operation by the user. The first part 301 is engaged with the housing as follows: the first part 301 has a mounting hole 303, and a torsion spring is installed in the mounting hole 303. A pin set on the inner wall of the housing passes through the mounting hole 303. The rotational engagement of the pin and the mounting hole 303 allows the first trigger 3 to rotate relative to the housing. One end of the torsion spring abuts against the side wall of the mounting hole 303, and the other end abuts against the pin. When the first trigger 3 rotates around the pin, the torsion spring undergoes elastic deformation to provide elastic force to the first trigger 3. The elastic force acts as the rotational resistance of the first trigger 3, enabling it to return to its initial position without external force. The axis of the mounting hole 303 or the pin is the rotation axis of the first trigger 3. Additionally, the first part 301 includes a pressing part 304 protruding parallel to the rotation axis. The stop member 4 is located on the inner wall of the housing, protruding relative to the inner wall of the housing. Its protrusion direction is parallel to the extension direction of the rotation axis, and its protrusion height is greater than the height of the spring piece 203 on the housing. During the assembly of the first trigger 3 onto the handle 1, it is necessary to… To move the first trigger 3 along the rotation axis so that the mounting hole 303 approaches the pin and is thus inserted, as the mounting hole 303 gradually approaches the pin, i.e., as the first trigger 3 gradually approaches the housing, the first part 301 of the first trigger 3 will first abut against the stop 4 with a larger protrusion. This prevents the first trigger 3 from continuing to approach the housing along the rotation axis. Because the area of ​​the first part 301 is large, the spring 203 of the already assembled signal switch 2 in the released state is located on the movement trajectory of the first part 301 (e.g., ...). Figure 2 As shown), if the first trigger 3 continues to move along the rotation axis without being blocked by the stop 4, it will crush the spring 203 in the released state. However, because the stop 4 blocks the first trigger 3, it can prevent the first trigger 3 from moving in the extension direction of the rotation axis and contacting the spring 203, thus avoiding damage to the spring 203 due to improper operation during assembly. In the subsequent assembly process, since the top of the pin has already extended into the mounting hole 303 when the first part 301 is blocked by the stop 4, the first trigger 3 can be rotated in the positive direction around the pin (or around the rotation axis). Figure 1 and Figure 2 From the perspective of [the viewpoint], the rotation direction at this time is clockwise, so as to achieve the first part 301 to avoid the stop 4 and the spring piece 203. Then the first trigger 3 can continue to move along the rotation axis so that the pin continues to pass into the mounting hole 303. After the pin is fully inserted into the mounting hole 303, the first trigger 3 contacts the inner wall of the housing. Finally, the first trigger 3 is rotated in the opposite direction around the pin (in [the viewpoint]). Figure 1 and Figure 2 From the perspective of the first trigger 3, the rotation direction is counterclockwise, so that the pressing part 304 protruding on the first part 301 can press against the spring 203 in the rotation direction of the first trigger 3, and the first trigger 3 is assembled in place, and the assembly process of the first trigger 3 is completed.

[0056] The power tool with the above structure has a stop 4 on the handle 1. When the first trigger 3 moves along the rotation axis to be assembled on the handle 1, the stop 4 will block the first trigger 3 in the extension direction of the rotation axis, preventing the first trigger 3 from continuing to approach the handle 1 in that direction. Since the spring 203 of the signal switch 2 already installed on the handle 1 is located on the movement trajectory of the first trigger 3, the stop 4 can prevent the first trigger 3 from pressing against the spring 203 due to continued movement, thereby avoiding damage to the signal switch 2 during the assembly of the power tool. This ensures that the signal switch 2 and the power tool have good working performance and eliminates the need for rework. This not only improves the production efficiency of the power tool but also reduces its production cost.

[0057] In optional embodiments, such as Figures 1-3 As shown, a stop portion 305 is provided on the first trigger 3; a through hole extending along the rotation direction of the first trigger 3 is provided on the stop member 4, and the stop portion 305 can extend into the through hole to assemble the first trigger 3 into place. In this application, the specific structure of the stop member 4 can be selected in various ways, such as it can be a solid block or plate structure, etc. In order to minimize the impact of adding the stop member 4 on the assembly of the first trigger 3 and the normal operation of the first trigger 3 after assembly, this application preferably makes the stop member 4 have a through hole, that is, makes the stop member 4 a... Figure 1 and Figure 2The frame-shaped or ring-shaped component shown, and in order to cooperate with the frame-shaped component, the first part 301 also includes a stop portion 305 that can extend into the through hole. The stop portion 305 and the stop member 4 cooperate in the following way: as the first trigger 3 approaches the housing of the handle 1 along the rotation axis, the stop portion 305 and the stop member 4 are aligned. As the first trigger 3 gradually approaches the housing, the stop portion 305 and the stop member 4 come into contact with each other to form a blockage. That is, the stop member 4 blocks the first trigger 3 by blocking the stop portion 305. In the extension direction of the rotation axis... Upward, the stop part 305 and the stop piece 4 overlap. Then, the first trigger 3 is rotated in the forward direction to misalign the stop part 305 and the stop piece 4. At the same time, the first trigger 3 avoids the spring piece 203. Then, the first trigger 3 continues to move along the rotation axis to bring the stop part 305 and the stop piece 4 to the same height, that is, the stop part 305 and the stop piece 4 are aligned on a plane perpendicular to the rotation axis (or in the direction of rotation). Finally, by moving the first trigger 3 in the reverse direction, the stop part 305 can be inserted into the through hole of the stop piece 4 (e.g., ...). Figure 2 As shown in the figure, this allows the first trigger 3 to be assembled into place. It should be noted that the opening area of ​​the through hole is larger than the cross-sectional area of ​​the insertion end of the stop part 305, so that the stop part 305 can move in and out of the through hole flexibly and smoothly, thereby avoiding affecting the rotation of the first trigger 3.

[0058] like Figure 3As shown, based on the setting of the stop portion 305, the stop portion 305 preferably includes: a first stop section 3051, which protrudes from the first trigger 3 parallel to the rotation axis; and a second stop section 3052, which is connected to the protruding end of the first stop section 3051 and is set along the rotation direction of the first trigger 3 and protrudes from the edge of the first trigger 3 in the rotation direction; wherein, when the first trigger 3 moves along the rotation axis, the second stop section 3052 abuts against the stop member 4; and, when the first trigger 3 rotates, the second stop section 3052 enters the through hole. In this structure, the first stop section 3051 protrudes parallel to the rotation axis. This reduces the protrusion height of the stop member 4 while ensuring proper engagement with it. Specifically, the protrusion is distributed across the housing and the first trigger 3 in the direction parallel to the rotation axis, thus lowering the height of the stop member 4 and preventing interference with other structures or components due to excessive protrusion. This optimizes the structure of the power tool. The second stop section 3052 is positioned along the rotation direction of the first trigger 3. When positioned on the protruding end of the first stop section 3051, one end of the second stop section 3052 is connected to the protruding end of the first stop section 3051, forming an inverted L-shaped structure. This allows the second stop section 3052 to normally enter and exit the through hole on the stop member 4 in the rotation direction, achieving the engagement between the stop section 305 and the stop member 4. Furthermore, this application preferably specifies that the end of the second stop segment 3052 furthest from the first stop segment 3051 protrudes in the rotational direction relative to the edge of the first partial section 301. The protrusion length must ensure that the second stop segment 3052 is still inserted into the through hole of the stop member 4 when the first trigger 3 is assembled in place. Figure 3 As shown. With this setting, before assembling the first trigger 3, it is not necessary to pre-rotate the first trigger 3 in the reverse direction. It is only necessary to position the first trigger 3 at the same angle as when it is assembled. Furthermore, it is not necessary to rotate it to a larger angle during subsequent rotations. This ensures that the assembly operation is consistent with the original assembly operation and avoids affecting the assembly equipment and / or assembly process.

[0059] Furthermore, the spring 203 moves within the first region to open and close the signal switch 2; the second stop section 3052 abuts against the stop member 4 in the direction of the rotation axis, allowing the first trigger 3 to rotate in the rotation direction to avoid the angle of the first region. The first region refers to the space occupied by the spring 203 during its transition from a released state to a compressed state, and it is a fan-shaped area on a plane perpendicular to the rotation axis. During assembly, to release the obstruction of the stop member 4 on the first trigger 3, the first trigger 3 needs to be rotated forward. During this forward rotation, the second stop section 3052 gradually changes from overlapping with the stop member 4 to being offset from it. In this offset state, the second stop section 3052 no longer abuts against the stop member 4. In other words, the length of the second stop section 3052 determines the angle of forward rotation of the first trigger 3. In this application, the purpose of forward rotation of the first trigger 3 is to avoid the stop member 4 while simultaneously allowing the spring 203 to rotate to avoid the stop member 4. The pressing part 304 on part 301 avoids the spring piece 203. Since the spring piece 203 changes from the released state to the compressed state by moving within the first area under the action of the pressing part 304, and the pressing part 304 rotates synchronously with the second stop section 3052, the first trigger 3 can be rotated forward by a certain angle to avoid the first area. That is, the fan-shaped area corresponding to the rotation angle of the first trigger 3 is larger than and covers the first area, so that the pressing part 304 can avoid the spring piece 203, thereby completely preventing the spring piece 203 from being damaged by the pressing.

[0060] In this application, as Figures 1-4As shown, the signal switch 2 is mounted on the handle 1 via the mounting piece 5; the first trigger 3 is provided with a first magnetic component (not shown in the figure), and the mounting piece 5 is provided with a first sensor 6 for detecting the magnetic field strength of the first magnetic component. As described above, the first trigger 3 can have a speed adjustment function. In an optional embodiment, one way to implement the speed adjustment of the first trigger 3 is as follows: a first magnetic element is provided on the first trigger 3. This first magnetic element can be a common magnet or other magnetic materials. The signal switch 2 is fixedly installed in the installation space, specifically by being fixedly connected to the housing through the mounting part 5. A first sensor 6 is also fixedly provided on this mounting part 5. This first sensor 6 is, for example, a Hall sensor or a magnetic field sensor that can detect the magnetic field strength of the first magnetic element. When the first trigger 3 is subjected to the force applied by the user, it rotates in the positive direction around the rotation axis, and the spring 203 and the pressing part 304 disengage from each other. The controller 9, which is electrically connected to the signal switch 2, receives a voltage signal, and the power tool starts. At the same time, the first magnetic element provided on the first trigger 3 rotates with the first trigger 3. Since the position of the first magnetic element relative to the first sensor 6 has changed, the first sensor 6 detects a change in the magnetic field strength. The first sensor 6 will therefore send a speed adjustment signal to the controller 9. The controller 9 controls the motor of the power tool to adjust the speed according to the received speed adjustment signal.

[0061] Specifically, in order to better cooperate with the fixedly installed first sensor 6, this application preferably uses an arc-shaped strip magnet as the first magnetic component, and the first part 301 is provided with an arc-shaped strip mounting groove 306 that matches the shape of the magnet, such as... Figure 3 As shown.

[0062] like Figure 1 and Figure 2As shown, the power tool also includes: a second trigger 7, disposed on the handle 1, for locking and unlocking the first trigger 3; a second magnetic element (not shown), disposed on the second trigger 7; and a shield 8, disposed between the first sensor 6 and the second magnetic element, to prevent the first sensor 6 from detecting the magnetic field strength of the second magnetic element. The second trigger 7, used for locking and unlocking the first trigger 3, is the unlocking trigger. When disposed on the handle 1, it is similar to the first trigger 3, having both a portion located inside the housing and a portion extending outside the housing. A retaining portion 307 protrudes from the first portion 301 of the first trigger 3. The second trigger 7 locks the first trigger 3 by locking this retaining portion 307. Only when the second trigger 7 releases the lock on the retaining portion 307 can the user turn the first trigger 3. The second magnetic component mounted on the second trigger 7 cooperates with a second sensor (not shown) located within the controller 9. The second sensor is of the same type as the first sensor 6, and detects the position of the second trigger 7 by detecting changes in the magnetic field strength of the second magnetic component. Since the first magnetic component, the second magnetic component, and the first sensor 6 are all located within the mounting space with a small distance between them, the first sensor 6 is prone to crosstalk with multiple magnetic components (i.e., the first and second magnetic components). This means the first sensor 6 may be affected by unrelated second magnetic components, incorrectly detecting the magnetic field strength of the second magnetic component on the second trigger 7 and issuing incorrect speed control signals, thus affecting the normal operation of the power tool. Therefore, to avoid this situation, a shield 8 is installed within the mounting space, positioned between the first sensor 6 and the second magnetic component, to shield the magnetic field of the second magnetic component. This prevents the first sensor 6 from detecting the magnetic field strength of the second magnetic component, ensuring that the first sensor 6 can only detect the magnetic field strength of the first magnetic component, allowing the power tool to operate more reliably. This shield 8 is made of a material with good magnetic permeability, such as iron or silicon steel.

[0063] In optional embodiments, such as Figure 1 , Figure 2 and Figure 4As shown, the mounting component 5 is a mounting plate, wherein the signal switch 2 and the first sensor 6 are mounted on the first plate surface of the mounting plate near the first trigger 3; the shielding component 8 is mounted on the second plate surface of the mounting plate near the second trigger 7 and parallel to the first plate surface. The mounting component 5 is preferably a plate-shaped component, which allows the signal switch 2 to have a larger mounting area, enabling more reliable installation of the signal switch 2. More preferably, the plate-shaped mounting component 5 is a Hall plate, which is electrically connected to the controller 9 mounted on the handle 1 via a wire 10. Placing the signal switch 2 and the first sensor 6 on the first plate surface of the mounting plate near the first trigger 3 allows the first trigger 3 to properly cooperate with the signal switch 2 and improves the detection accuracy of the first sensor 6 on the first magnetic component mounted on the first trigger 3. Laying the shielding component 8 on the second plate surface of the mounting plate near the second trigger 7 and parallel to the first plate surface provides more comprehensive shielding for the first sensor 6 and simplifies the structure, saving space.

[0064] In addition, such as Figure 1 As shown, this application also provides a partition 11 between the Hall plate and the display panel in the controller 9 to create two spaces, so that the Hall plate and the display panel are located in these two spaces respectively, thereby further improving the shielding effect.

[0065] In this application, such as Figure 1 and Figure 3 As shown, the first trigger 3 also includes a first portion 301 located inside the housing of the handle 1, and a second portion 302 located outside the housing and connected to the first portion 301; and the housing has an opening that allows the second portion 302 to extend out, and the first portion 301 has a blocking portion 308 to block the opening to prevent the first portion 301 from being exposed. In this structure, the opening not only needs to allow the second portion 302 to extend out of the housing, but also needs to allow the first trigger 3 to rotate relative to the housing. Therefore, the opening needs to have a certain length (or needs to be set as a strip-shaped opening) to meet the user's rotation needs for turning the first trigger 3. That is to say, there is a large gap at the connection between the first trigger 3 and the housing, and by providing a blocking portion 308 on the first portion 301, the opening can be blocked. Figure 3 As shown, this blocking part 308 is located near the second part 302 of the first part 301 and is adjacent to the stop part 305. When the first trigger 3 is not turned by the user and is in the assembled position as described above, such as Figure 1 As shown, the shield 308 is exposed on the housing to block the opening, which can prevent dust or grass clippings from entering the housing. When the first trigger 3 is rotated forward by the user, as the rotation angle increases, the shield 308 will enter the installation space and be shielded by the housing.

[0066] Specifically, such as Figure 1 and Figure 3 As shown, the opening is formed on the arc-shaped wall surface of the housing. The blocking part 308 includes: a blocking arc surface 3081 that matches the arc-shaped wall surface; a first blocking side surface 3082 and a second blocking side surface 3083, which are located on both sides of the blocking arc surface 3081 and together with the blocking arc surface 3081, block the opening; wherein, the sum of the areas of the blocking arc surface 3081, the first blocking side surface 3082 and the second blocking side surface 3083 is greater than the area of ​​the opening, so that the blocking part 308 can block the opening at all times during the rotation of the first trigger 3. In other words, the shielding part 308 is a block structure. When sealing the opening, three of its walls are exposed relative to the shell. Among these three walls, the shielding arc surface 3081 is adapted to the arc-shaped wall of the shell, so that when exposed, it can be smoothly spliced ​​with the arc-shaped wall of the shell, making the shell's appearance more consistent and aesthetically pleasing. The first shielding side surface 3082 and the second shielding side surface 3083 located on both sides of the shielding arc surface 3081 can make up for the positions that the shielding arc surface 3081 cannot seal, so as to achieve all-round sealing of the opening, thereby more thoroughly preventing dust and grass clippings from entering the shell.

[0067] In addition, this application embodiment also provides an assembly method for power tools, which is applicable to the power tools described above. The method includes the following steps:

[0068] The worker or assembly equipment fixes the housing of the handle 1 and moves the first trigger 3 along the axis of rotation so that the first trigger 3 moves closer to the handle 1;

[0069] During the process of approaching the handle 1, when the first trigger 3 comes into contact with the stop 4, specifically when the stop part 305 on the first trigger 3 comes into contact with the stop 4, while keeping the mounting hole 303 on the first trigger 3 aligned with the pin on the housing, the first trigger 3 is rotated in the positive direction around the rotation axis to avoid the stop 4, and at the same time avoiding the stop 4, the first trigger 3 avoids the spring piece 203 in the released state.

[0070] Continue moving the first trigger 3 along the rotation axis to the assembly position, which refers to the end point where the first trigger 3 can no longer move along the rotation axis, that is, the position where the first trigger 3 contacts the housing, or the position where the pin is fully inserted into the mounting hole 303;

[0071] The first trigger 3 is rotated in the opposite direction around the rotation axis so that the stop part 305 is inserted into the through hole of the stop part 4, and at the same time, the pressing part 304 on the first trigger 3 presses against the spring piece 203 in the rotation direction, thereby making the first trigger 3 cooperate with the spring piece 203 of the signal switch 2, and the assembly operation of the first trigger 3 is completed.

[0072] By assembling the first trigger 3 onto the handle 1 using the above assembly method, the first trigger 3 can avoid pressing against the spring 203, thereby avoiding damage to the signal switch 2 during the assembly of the power tool. This ensures that the signal switch 2 and the power tool have good working performance, and there is no need for rework. This not only improves the production efficiency of the power tool, but also reduces the production cost of the power tool.

[0073] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0074] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0075] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0076] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0077] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0078] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A power tool, characterized in that, include: handle; A signal switch is provided on the handle and includes a spring. The first trigger is mounted on the handle and rotates about the axis of rotation. A stopper is provided on the handle; When the first trigger moves along the rotation axis to assemble with the handle, the stop member blocks the first trigger to prevent the first trigger from pressing against the spring.

2. The power tool according to claim 1, characterized in that, The first trigger is provided with a stop; The stop member has a through hole extending along the rotation direction of the first trigger, and the stop part can extend into the through hole to assemble the first trigger into place.

3. The power tool according to claim 2, characterized in that, The stop portion includes: The first stop section protrudes from the first trigger parallel to the rotation axis; The second stop section is connected to the protruding end of the first stop section and is arranged along the rotation direction of the first trigger, and protrudes from the edge of the first trigger in the indicated rotation direction. When the first trigger moves along the rotation axis, the second stop section abuts against the stop member; and when the first trigger rotates, the second stop section enters the through hole.

4. The power tool according to claim 3, characterized in that, The spring moves within a first region to open and close the signal switch; the second stop section abuts against the stop member in the direction of the rotation axis to allow the first trigger to rotate in the rotation direction to avoid the angle of the first region.

5. The power tool according to claim 1, characterized in that, The signal switch is mounted on the handle via a mounting component; The first trigger is provided with a first magnetic component, and the mounting component is provided with a first sensor for detecting the magnetic field strength of the first magnetic component.

6. The power tool according to claim 5, characterized in that, Also includes: A second trigger is provided on the handle for locking and unlocking the first trigger; A second magnetic component is disposed on the second trigger; A shielding element is disposed between the first sensor and the second magnetic element to prevent the first sensor from detecting the magnetic field strength of the second magnetic element.

7. The power tool according to claim 6, characterized in that, The mounting component is a mounting plate, wherein: The signal switch and the first sensor are disposed on the first plate surface of the mounting plate near the first trigger; The shielding element is disposed on the second plate surface of the mounting plate, which is close to the second trigger and parallel to the first plate surface.

8. The power tool according to claim 1, characterized in that, The first trigger includes a first portion located within the housing of the handle, and a second portion located outside the housing and connected to the first portion; Furthermore, the housing has an opening that allows the second part to extend out, and the first part has a shielding portion that blocks the opening to prevent the first part from being exposed.

9. The power tool according to claim 8, characterized in that, The opening is formed on the arc-shaped wall surface of the housing, and the shielding portion includes: The curved surface is shielded to match the curved wall surface; The first and second shielding sides are located on opposite sides of the shielding arc surface, and together with the shielding arc surface, they shield the opening. The sum of the areas of the shielding arc surface, the first shielding side surface, and the second shielding side surface is greater than the area of ​​the opening, so that the shielding part can always shield the opening during the rotation of the first trigger.

10. A method for assembling a power tool, characterized in that, The method, applicable to any one of claims 1-9, comprises the following steps: Move the first trigger along the axis of rotation so that the first trigger approaches the handle; When the first trigger comes into contact with the stop, the first trigger is rotated in the positive direction around the rotation axis to avoid the stop; Continue moving the first trigger along the rotation axis to the assembly position; The first trigger is rotated in the opposite direction about the rotation axis to engage with the spring of the signal switch.

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