Anti-self locking switch for power tools

Abstract

The application discloses an anti-self-locking switch of an electric tool, which comprises a shell, a limiting portion arranged in the shell, a pressing trigger movably arranged on the shell, a pressing trigger being pressed and starting the electric tool by pressing the pressing trigger, and a limiting knob rotatably arranged on the pressing trigger, two ends of the limiting knob being an unlocking end and a limiting end respectively, a torsional spring being arranged on the rotating shaft of the limiting knob, the torsional spring being capable of driving the limiting end to always abut against the limiting portion, the pressing trigger being unable to be pressed until the unlocking end is rotated to make the limiting end no longer abut against the limiting portion, and the pressing trigger being switched from the locking state to the unlocking state at this time. The limiting knob is arranged on the pressing trigger, so that the user can smoothly rotate the limiting knob arranged on the pressing trigger while holding the shell and naturally hold the finger on the pressing trigger, meanwhile, the unlocking end is accommodated into the pressing trigger, and the finger can also limit the limiting knob from rebounding when the finger is held.

Description

Technical Field

[0001] This application relates to the field of power tool technology, and in particular to an anti-locking switch for power tools. Background Technology

[0002] Power tools, such as electric drills, angle grinders, and electric saws, often pose certain dangers during use, especially those that can be started by pressing a button. Accidental activation of such tools can lead to safety hazards. Therefore, some power tools, such as the switch assembly and power tool proposed in announcement number CN212322862U, limit the pressing of the start switch by locking the contact between the lock switch and the start switch to prevent accidental activation. However, because the lock switch and the start switch are not on the same side, there are certain requirements for the user's grip and force application. While this further increases the effectiveness of preventing accidental activation, it can be difficult to operate for some users with unsuitable hand shapes. Therefore, the purpose of this application is to solve the above problems.

[0003] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0004] Based on this, this application provides an anti-locking switch for power tools to solve one of the aforementioned technical problems.

[0005] The technical solution adopted by this application to solve its technical problem is an anti-locking switch for power tools, comprising: a housing with a limiting part inside; a pressing trigger movably disposed on the housing, which is pressed to activate the power tool; and a limit switch rotatably disposed on the pressing trigger, wherein the two ends of the limit switch are an unlocking end and a limiting end, respectively, and a torsion spring is disposed on its rotation axis. The torsion spring can drive the limiting end to always abut against the limiting part, preventing the pressing trigger from being pressed, until the unlocking end is moved so that the limiting end no longer abuts against the limiting part, at which point the pressing trigger enters the unlocked state from the locked state.

[0006] In some embodiments, the pressing trigger has a movable groove, and the axis of the limiting knob is located in the movable groove.

[0007] In some embodiments, a first limiting wall and a second limiting wall are formed in the movable groove to limit the rotation range of the limiting knob. When the limiting knob is rotated to the unlocked state, the unlocking end will be attached to the first limiting wall, and when the limiting knob is rotated to the locked state, the limiting end will be attached to the second limiting wall.

[0008] In some embodiments, the first limiting wall or the second limiting wall is provided with a torsion arm groove for accommodating the torsion arm of the torsion spring.

[0009] In some embodiments, the limiting part has an arc-shaped profile, and one end of the limiting knob moves along the profile of the limiting part during rotation.

[0010] In some embodiments, the limit switch extends at least partially from the trigger in the locked state and is fully retracted from the trigger in the folded state.

[0011] The beneficial effects of this application are as follows: This application sets the limit switch on the trigger, so that when the user holds the housing, he can smoothly rotate the limit switch located on the trigger and naturally rest his fingers on the trigger. At the same time, the unlocking end will be stored in the trigger, and the limit switch can also be restricted from rebounding when the fingers are resting on it. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional structural diagram of this application.

[0014] Figure 2 This is a cross-sectional view of the locked state of this application.

[0015] Figure 3 yes Figure 2 A magnified view of part A.

[0016] Figure 4 yes Figure 3 A diagram showing the unlocked state.

[0017] Figure 5 This is a schematic diagram of the movable groove of the pressing trigger in this application.

[0018] Explanation of reference numerals in the attached diagram: 1. Housing; 11. Limiting part; 2. Pressing trigger; 21. Movable groove; 211. First limiting wall; 212. Second limiting wall; 213. Torsion arm groove; 3. Limiting knob; 31. Unlocking end; 32. Limiting end; 33. Torsion spring. Detailed Implementation

[0019] 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 a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.

[0020] In the embodiments of this application, please refer to Figure 1-5 As shown, this application provides an anti-locking switch for power tools, mainly comprising: a housing 1, with a limiting part 11 inside; a pressing trigger 2, movably disposed on the housing 1, which is pressed to activate the power tool; and a limit switch 3, rotatably disposed on the pressing trigger 2, with an unlocking end 31 and a limiting end 32 at its two ends, and a torsion spring 33 disposed on its rotation axis. The torsion spring 33 can drive the limiting end 32 to always abut against the limiting part 11, preventing the pressing trigger 2 from being pressed, until the unlocking end 31 is moved so that the limiting end 32 no longer abuts against the limiting part 11, at which point the pressing trigger 2 enters the unlocked state from the locked state.

[0021] Specifically, one end of the torsion spring 33 is fixed to the trigger 2, and the other end abuts against the inside of the limit switch 3. In its natural state, the drive limit end 32 always faces the limit part 11 of the housing 1. At this time, the limit switch 3 and the limit part 11 block each other, and the trigger 2 cannot be pressed down to enter the locked state. Manually moving the unlock end 31 causes the limit switch 3 to rotate, causing the limit end 32 to disengage from the limit part 11, and the trigger 2 can be pressed freely. This can prevent accidental activation or accidental start when the tool is tilted, and realize the anti-locking function. The limit switch 3 is set on the trigger 2, so that when the user wants to turn on the power tool, he / she moves the limit switch 3 and naturally rests his / her hand on the trigger 2, optimizing the user experience.

[0022] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.

[0023] Specifically, the pressing trigger 2 has a movable groove 21, and the axis of the limiting knob 3 is located in the movable groove 21, so that the knob always fits against the groove wall when it rotates, avoiding lateral displacement that would cause failure to cooperate with the limiting part 11.

[0024] Reference Figure 3-4As shown, the movable groove 21 contains a first limiting wall 211 and a second limiting wall 212 that restrict the rotation range of the limiting knob 3. When the limiting knob 3 is rotated to the unlocked state, the unlocking end 31 will be attached to the first limiting wall 211. When the limiting knob 3 is rotated to the locked state, the limiting end 32 will be attached to the second limiting wall 212. When the limiting knob 3 is manually rotated to the unlocked state, the inner edge of the limiting knob 3 will be attached to the first limiting wall 211. At this time, the limiting end 32 is completely disengaged from the limiting part 11 of the housing 1, and the rotation angle is restricted. When the limiting knob 3 is released, under the elastic force of the torsion spring 33, the limiting knob 3 rotates in the opposite direction to the locked state, and its outer edge is attached to the second limiting wall 212. At this time, the knob end just abuts against the limiting part 11 of the housing 1, and the rotation angle is also restricted.

[0025] Reference Figure 5 As shown, the first limiting wall 211 or the second limiting wall 212 is provided with a torsion arm groove 213 for accommodating the torsion arm of the torsion spring 33. The setting of the torsion arm groove 213 ensures that the torsion spring 33 is always kept in the preset position, preventing the torsion arm from shifting when the toggle button is rotated, thus preventing the spring force from failing and ensuring that the toggle button is stably reset to the locked state. At the same time, the torsion arm of the torsion spring 33 will be placed in the torsion arm groove 213, which will not affect the maximum rotation angle of the limiting toggle button 3 in the locked or unlocked state.

[0026] Reference Figure 3-4 As shown, the limiting part 11 has an arc-shaped outline. During the rotation of the limiting knob 3, one end of it will move along the outline of the limiting part 11. When the limiting knob 3 is manually rotated, the limiting end 32 will slide along the arc-shaped outline of the limiting part 11 from the abutting state of the locked position to the disengaged state of the arc-shaped surface. The arc-shaped design makes the knob rotate without any jamming sensation, and at the same time avoids wear on the knob end caused by the right-angle limiting part 11.

[0027] Preferably, the limiting switch 3 extends at least partially from the trigger 2 in the locked state and is fully retracted from the trigger 2 in the folded state. This configuration provides the user with operating space, and after unlocking, the force applied when pressing the trigger 2 can be used to limit the reset of the limiting switch 3.

[0028] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An anti-locking switch for power tools, characterized in that, include: The housing has a limiting part inside; A press trigger is movably mounted on the housing. Pressing the press trigger activates the power tool. A limit switch is rotatably mounted on the trigger. The two ends of the limit switch are the unlock end and the limit end, respectively. A torsion spring is provided on its rotation axis. The torsion spring can drive the limit end to always abut against the limit part, so that the trigger cannot be pressed until the unlock end is moved so that the limit end no longer abuts against the limit part. At this time, the trigger moves from the locked state to the unlocked state.

2. The anti-locking switch for an electric tool according to claim 1, characterized in that, The pressing trigger has a movable groove, and the axis of the limiting button is located in the movable groove.

3. The anti-locking switch for an electric tool according to claim 2, characterized in that, The movable groove contains a first limiting wall and a second limiting wall that restrict the rotation range of the limiting knob. When the limiting knob is rotated to the unlocked state, the unlocking end will be attached to the first limiting wall. When the limiting knob is rotated to the locked state, the limiting end will be attached to the second limiting wall.

4. The anti-locking switch for an electric tool according to claim 3, characterized in that, The first or second limiting wall is provided with a torsion arm groove for accommodating the torsion arm of the torsion spring.

5. The anti-locking switch for an electric tool according to claim 1, characterized in that, The limiting part has an arc-shaped outline, and one end of the limiting knob will move along the outline of the limiting part during rotation.

6. The anti-locking switch for an electric tool according to claim 1, characterized in that, The limit switch extends at least partially from the trigger in the locked state and is fully retracted into the trigger in the folded state.

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