Electric tool

Abstract

The utility model provides an electric tool which comprises a shell, a starting switch, a locking piece, a locking switch and a controller, the starting switch is arranged on the shell and comprises a trigger, and one end of the trigger is rotatably arranged on the shell so that the starting switch can be triggered by pressing the trigger; the locking piece can be movably arranged on the trigger, and when the locking piece is located at the locking position, the locking piece abuts against the shell so as to limit rotation of the trigger; when the locking piece is located at the unlocking position, the locking piece is separated from the shell, so that the trigger can rotate; the locking switch is arranged on the shell; the controller is arranged on the shell, the controller is electrically connected with the starting switch and the locking switch, and the controller is used for controlling operation of the electric tool according to a first switching signal of the starting switch and a second switching signal of the locking switch. The electric tool can solve the problem that a self-locking device of an existing electric tool cannot meet the requirement of the IEC62841 standard.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of electric tools, and in particular to an electric tool. Background Art

[0002] Most existing power tools, such as angle grinders, use a mechanical self-locking switch to control the self-locking of the start switch. Both the mechanical self-locking switch and the start switch can be operated with a single finger. Because the IEC62841 standard requires two independent actions to close and lock the switch, the self-locking devices of existing power tools do not meet the requirements of the IEC62841 standard. With the IEC62841 standard expected to be mandatory in 2025, designing a self-locking device that meets the standard requirements is an urgent issue. Utility Model Content

[0003] The purpose of the embodiments of the present utility model is to provide an electric tool, aiming to solve the problem that the self-locking device of the existing electric tool does not meet the requirements of the IEC62841 standard.

[0004] In order to solve the above technical problems, the embodiments of the present utility model provide an electric tool, comprising:

[0005] case;

[0006] a start switch, the start switch being disposed on the housing and comprising a trigger, one end of the trigger being rotatably disposed on the housing so as to trigger the start switch by pressing the trigger;

[0007] a locking member movably disposed on the trigger, wherein when the locking member is in a locked position, the locking member abuts against the housing to restrict rotation of the trigger; and when the locking member is in an unlocked position, the locking member is disengaged from the housing to allow rotation of the trigger;

[0008] a locking switch, the locking switch being arranged on the housing;

[0009] A controller is provided on the housing, the controller is electrically connected to the start switch and the lock switch, and the controller is used to control the operation of the power tool according to a first switch signal of the start switch and a second switch signal of the lock switch.

[0010] Preferably, a gripping portion for a user to hold is provided at one end of the housing, and the start switch and the locking switch are provided on the gripping portion.

[0011] Preferably, the start switch and the lock switch are spaced apart in the circumferential direction of the grip portion, and the start switch and the lock switch are disposed opposite to each other in the rotation direction of the trigger.

[0012] Preferably, a motor is provided at one end of the housing away from the gripping portion, an anti-slip structure is provided on the gripping portion, and the locking switch is located on a side of the anti-slip structure close to the motor.

[0013] Preferably, the locking switch is located on a side of the trigger away from a rotational connection between the trigger and the housing.

[0014] Preferably, the locking switch includes a switch button, and the switch button can be movably arranged on the housing so that the locking switch can be triggered by pressing the switch button.

[0015] Preferably, a light-transmitting portion is provided on the switch button, and the electric tool further comprises an indicator light, which is provided in the housing and faces the light-transmitting portion, and is electrically connected to the controller.

[0016] Preferably, the indicator light is integrated on the locking switch.

[0017] Preferably, the controller is used to control the power tool to continue running when the second switch signal is received within a preset time period after receiving the first switch signal; and to control the power tool to stop running when the second switch signal is not received within the preset time period after receiving the first switch signal.

[0018] Preferably, the electric tool is an angle grinder, a cutting machine, an electric drill or an electric pick.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The power tool of the present invention locks the starting switch by a locking member, thereby realizing the mechanical locking function of the power tool. At the same time, a locking switch is added. The controller can control the operation of the power tool according to the first switch signal of the starting switch and the second switch signal of the locking switch, thereby realizing the electronic locking function of the power tool. In this way, an electronic locking function is added on the basis of the mechanical locking function, and the starting switch and the locking switch are distributed at different positions on the housing of the power tool, which can meet the standard requirement that starting and locking are completed as two independent actions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0022] Figure 1 This is a schematic structural diagram of an electric tool in an embodiment of the present utility model;

[0023] Figure 2 for Figure 1 Working principle diagram of electric tools.

[0024] Description of the accompanying drawings of this utility model:

[0025] Power tool 100 , housing 1 , grip 11 , anti-slip structure 12 , start switch 2 , trigger 21 , locking member 3 , locking switch 4 , switch button 41 , light-transmitting portion 42 , controller 5 , motor 6 , tool accessories 7 .

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] The utility model provides an electric tool, which can be an angle grinder, a cutting machine, an electric drill or an electric pick, etc. The following will take the electric tool as an example to introduce the angle grinder. Figure 1 and Figure 2 A preferred embodiment of the electric tool provided by the utility model is shown.

[0031] See also Figure 1 and Figure 2 In this embodiment, the electric tool 100 includes a housing 1 , a start switch 2 , a locking member 3 , a locking switch 4 and a controller 5 .

[0032] See also Figure 1 The start switch 2 is provided on the housing 1 , and the start switch 2 includes a trigger 21 , one end of which is rotatably provided on the housing 1 , so that the start switch 2 can be triggered by pressing the trigger 21 .

[0033] Specifically, the start switch 2 is a trigger switch, comprising a trigger 21 and a start switch body (not shown). The start switch body is fixedly disposed within the housing 1, while the trigger 21 is located outside the housing 1. One end of the trigger 21, along its length, is rotatably disposed on the outer wall of the housing 1, while the other end of the trigger 21, along its length, is a free end. When a user grasps and presses the free end of the trigger 21, the trigger 21 rotates relative to the housing 1, causing the free end of the trigger 21 to move toward the start switch body, thereby pressing the trigger position of the start switch body. When the free end of the trigger 21 presses the trigger position of the start switch body, the start switch 2 closes and generates a first switching signal. When the user releases the trigger 21, the trigger 21 automatically rotates and resets, disengaging the free end of the trigger 21 from the trigger position of the start switch body, at which point the start switch 2 opens.

[0034] The length direction of the trigger 21 is defined as the front-to-back direction, the free end of the trigger 21 is defined as the front end of the trigger 21, and the direction of pressing the trigger 21 is defined as from bottom to top. Thus, the rear end of the trigger 21 is rotatably mounted on the outer wall of the housing 1. When the user grasps and presses the front end of the trigger 21 upward, the front end of the trigger 21 moves upward, thereby pressing the trigger position of the switch body.

[0035] See also Figure 1 The locking member 3 can be movably provided on the trigger 21. When the locking member 3 is in the locked position, the locking member 3 abuts against the housing 1 to limit the rotation of the trigger 21. When the locking member 3 is in the unlocked position, the locking member 3 is disengaged from the housing 1, so that the trigger 21 can rotate.

[0036] Specifically, the locking member 3 is a mechanical self-locking switch for the power tool 100, and has both self-locking and anti-self-locking functions. The locking member 3 is movable relative to the trigger 21, and has a locked position and an unlocked position within its range of motion. When the locking member 3 is in the locked position, it abuts the side of the housing 1 facing the direction in which the trigger 21 is pressed, i.e., the locking member 3 abuts the underside of the outer wall of the housing 1, preventing the user from pressing the trigger 21. When the locking member 3 is in the unlocked position, the locking member 3 is disengaged from the housing 1, allowing the user to pull the trigger 21 upward, and the trigger 21 can move the locking member 3 along with it.

[0037] The specific configuration of the locking member 3 may not be particularly limited. For example, the locking member 3 may be configured as a mechanical self-locking switch of an existing power tool 100. Figure 1 In this embodiment, the locking member 3 is rotatably disposed at the free end of the trigger 21 , and the rotation axis of the locking member 3 is parallel or approximately parallel to the rotation axis of the trigger 21 .

[0038] Specifically, the locking member 3 is initially in the locked position. When the user presses the locking member 3, the locking member 3 in the locked position can be rotated to the unlocked position. When the user does not press the mechanical self-locking switch (i.e., the locking member 3), the start switch 2 is in a non-pressable state. When the user presses the mechanical self-locking switch, the start switch 2 is in a pressable state. At this time, when the user presses the start switch 2, the power tool 100 will soft-start.

[0039] See also Figure 1 and Figure 2 The locking switch 4 is arranged on the housing 1, and the controller 5 is arranged on the housing 1. The controller 5 is electrically connected to the starting switch 2 and the locking switch 4. The controller 5 is used to control the operation of the power tool 100 according to the first switch signal of the starting switch 2 and the second switch signal of the locking switch 4.

[0040] Specifically, the locking switch 4 is an electronic locking switch of the power tool 100. When the locking switch 4 is closed, a second switch signal is generated. The specific style of the locking switch 4 can be set according to actual conditions. Figure 1 and Figure 2 In this embodiment, the locking switch 4 includes a switch button 41 , which can be movably provided on the housing 1 , so that the locking switch 4 can be triggered by pressing the switch button 41 .

[0041] Specifically, the lock switch 4 is a push-type switch, comprising a switch button 41 and a lock switch body (not shown). The lock switch body is fixedly disposed within the housing 1, and the switch button 41 is movably disposed on the outer wall of the housing 1. When a user grasps and presses the switch button 41, the switch button 41 is movable relative to the housing 1, such that the switch button 41 moves toward the lock switch body, thereby pressing the trigger position of the lock switch body. When the switch button 41 presses the trigger position of the lock switch body, the lock switch 4 is closed, generating a second switch signal. The following description uses the lock switch 4 as an example.

[0042] The controller 5 is electrically connected to the start switch 2 and the lock switch 4, so that the controller 5 can control the operation of the power tool 100 according to the first switch signal and the second switch signal. Optionally, in this embodiment, the controller 5 is configured to control the power tool 100 to continue operating if the second switch signal is received within a preset time period after receiving the first switch signal; and to control the power tool 100 to stop operating if the second switch signal is not received within the preset time period after receiving the first switch signal.

[0043] Specifically, when the start switch 2 is closed and generates a first switch signal, the start switch 2 can send the first switch signal to the controller 5. When the lock switch 4 is closed and generates a second switch signal, the lock switch 4 can send the second switch signal to the controller 5. After receiving the first switch signal from the start switch 2, if the controller 5 also receives the second switch signal from the lock switch 4 within a preset time period, the controller 5 will control the power tool 100 to continue operating. After receiving the first switch signal from the start switch 2, if the controller 5 does not receive the second switch signal from the lock switch 4 within a preset time period, the controller 5 will control the power tool 100 to stop operating. In this way, by providing the lock switch 4 on the power tool 100, an electronic locking function of the power tool 100 can be implemented.

[0044] For example, see Figure 1 and Figure 2 The housing 1 is provided with a motor 6, and the controller 5 is electrically connected to the start switch 2, the lock switch 4, and the motor 6. In this way, the controller 5 can control the operation of the motor 6 according to the first switch signal and the second switch signal. When the user presses the start switch 2 and keeps it pressed, if the user presses the lock switch 4 within a preset time period, the motor 6 will continue to run; when the user presses the start switch 2 and keeps it pressed, if the user does not press the lock switch 4 within the preset time period, the motor 6 will stop. That is, when the start switch 2 is kept pressed, the power tool 100 has a temporary operating state; when the start switch 2 is kept pressed and the lock switch 4 is pressed again, the start switch 2 is in a self-locking (closed lock) state.

[0045] Since the start switch 2 and the lock switch 4 are located at different positions on the housing 1, the start and lock of the power tool 100 can be completed as two independent actions to meet the standard requirements. The specific setting positions of the start switch 2 and the lock switch 4 on the power tool 100 can be set according to actual conditions, for example, see Figure 1 One end of the housing 1 is provided with a gripping portion 11 for the user to hold, and the start switch 2 is usually provided on the gripping portion 11.

[0046] Optionally, see Figure 1 In this embodiment, the start switch 2 and the lock switch 4 are provided on the grip portion 11. In this way, the start switch 2 and the lock switch 4 are both provided at positions where they can be triggered by a human hand, making it convenient for the user to trigger the start switch 2 and the lock switch 4.

[0047] The locking switch 4 can be installed at a position on the grip portion 11 where the thumb can operate after holding the power tool 100 normally. For example, the locking switch 4 can be located in front of or behind the start switch 2, or on one side of the start switch 2 in the circumferential direction of the grip portion 11. Figure 1 In this embodiment, the lock switch 4 is located on the side of the trigger 21 away from the rotation connection between the trigger 21 and the housing 1. The lock switch 4 is located on the front side of the trigger 21, so that the lock switch 4 can be easily triggered by the thumb when the trigger 21 is held by a person.

[0048] Optionally, see Figure 1 In this embodiment, the start switch 2 and the lock switch 4 are spaced apart in the circumferential direction of the grip portion 11 , and the start switch 2 and the lock switch 4 are disposed opposite to each other in the rotation direction of the trigger 21 .

[0049] Specifically, the trigger 21 of the start switch 2 is arranged downward on the lower shell wall of the grip part 11, and the switch button 41 of the lock switch 4 is arranged upward on the upper shell wall of the grip part 11. The installation positions of the start switch 2 and the lock switch 4 on the grip part 11 are arranged in this way, which makes it convenient to hold and trigger the start switch 2 and the lock switch 4 to provide a confirmation signal for the operation of the power tool 100, thereby improving the safety and convenience of operation.

[0050] Optionally, see Figure 1 In this embodiment, a motor 6 is provided at one end of the housing 1 away from the grip portion 11 , an anti-slip structure 12 is provided on the grip portion 11 , and the locking switch 4 is located on a side of the anti-slip structure 12 close to the motor 6 .

[0051] Specifically, the rear end of the housing 1 is provided with a grip portion 11, and the front end of the housing 1 is provided with a motor 6, which drives the tool accessory 7. The grip portion 11 has a gripping section that faces the palm. The trigger 21 of the start switch 2 is located on the gripping section. The side surface of the gripping section is provided with an anti-slip structure 12, such as anti-slip protrusions or anti-slip grooves, which increases the friction between the palm and the gripping section. The lock switch 4 is located on the front side of the gripping section, making it easy to trigger the lock switch 4 with the thumb when the user is holding the tool.

[0052] The power tool 100 of the present invention locks the start switch 2 through the locking member 3, thereby realizing the mechanical locking function of the power tool 100. At the same time, a locking switch 4 is added. The controller 5 can control the operation of the power tool 100 according to the first switch signal of the start switch 2 and the second switch signal of the locking switch 4, thereby realizing the electronic locking function of the power tool 100. In this way, an electronic locking function is added on the basis of the mechanical locking function, and the start switch 2 and the locking switch 4 are distributed at different positions on the housing 1 of the power tool 100, which can meet the standard requirement that starting and locking are completed as two independent actions.

[0053] After receiving the first switch signal of the start switch 2 and the second switch signal of the lock switch 4, the controller 5 can control the power components to complete the power on and off of the motor 6. The controller 5 can also integrate functional circuit modules such as power failure protection, soft start, and overload protection. Figure 1 In this embodiment, a light-transmitting portion 42 is provided on the switch button 41 , and the power tool 100 further includes an indicator light, which is provided in the housing 1 and faces the light-transmitting portion 42 , and is electrically connected to the controller 5 .

[0054] Specifically, at least a portion of the switch button 41 is transparent, thereby forming a light-transmitting portion 42 on the switch button 41. An indicator light (not shown) is disposed within the housing 1. The indicator light and the light-transmitting portion 42 are opposite each other along the indicator light's optical axis, allowing light emitted by the indicator light to pass through the light-transmitting portion 42. The controller 5 controls the indicator light to indicate the status of the power tool 100. For example, the controller 5 can use the indicator light to indicate states such as power-off protection, closed lock, and overload protection.

[0055] The locking switch 4 can be integrated with an indicator light, or the indicator light can be installed independently. Optionally, in this embodiment, the indicator light is integrated with the locking switch 4.

[0056] The power tool 100 is a tool with a mechanical self-locking switch. At the same time, the power tool 100 is provided with an electronic locking switch, and the electronic locking switch is set in a position that can be triggered when held by hand. By setting an electronic locking switch that is easy to trigger, a confirmation signal for the operation of the power tool 100 is provided, thereby improving the safety and convenience of the operation of the power tool 100.

[0057] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electric tool, characterized in that: include: case; a start switch, the start switch being disposed on the housing and comprising a trigger, one end of the trigger being rotatably disposed on the housing so as to trigger the start switch by pressing the trigger; a locking member movably disposed on the trigger, wherein when the locking member is in a locked position, the locking member abuts against the housing to restrict rotation of the trigger; and when the locking member is in an unlocked position, the locking member is disengaged from the housing to allow rotation of the trigger; A locking switch, the locking switch being arranged on the housing; A controller is provided on the housing, the controller is electrically connected to the start switch and the lock switch, and the controller is used to control the operation of the power tool according to a first switch signal of the start switch and a second switch signal of the lock switch.

2. The electric tool according to claim 1, wherein: One end of the shell is provided with a gripping portion for a user to grip, and the start switch and the locking switch are provided on the gripping portion.

3. The electric tool according to claim 2, wherein: The start switch and the lock switch are spaced apart in a circumferential direction of the grip portion, and are disposed opposite to each other in a rotation direction of the trigger.

4. The electric tool according to claim 2, wherein: A motor is provided at one end of the housing away from the gripping portion, an anti-slip structure is provided on the gripping portion, and the locking switch is located on a side of the anti-slip structure close to the motor.

5. The electric tool according to claim 1, wherein: The locking switch is located on a side of the trigger away from the rotational connection between the trigger and the housing.

6. The electric tool according to claim 1, wherein: The locking switch includes a switch button, which is movably arranged on the housing so as to trigger the locking switch by pressing the switch button.

7. The electric tool according to claim 6, wherein: The switch button is provided with a light-transmitting portion. The electric tool further includes an indicator light, which is provided in the housing and faces the light-transmitting portion. The indicator light is electrically connected to the controller.

8. The electric tool according to claim 7, wherein: The indicator light is integrated on the locking switch.

9. The electric tool according to claim 1, wherein: The controller is used to control the power tool to continue running when the second switch signal is received within a preset time period after receiving the first switch signal; and to control the power tool to stop running when the second switch signal is not received within the preset time period after receiving the first switch signal.

10. The electric tool according to claim 1, wherein The electric tool is an angle grinder, a cutting machine, an electric drill or an electric pick.

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