Switch structure of electric tool and electric tool thereof

Abstract

The utility model discloses a switch structure of an electric tool and the electric tool. The switch structure comprises a shell, a switch assembly, a safety switch and a button. The trigger is provided with a first limiting part; the switch assembly comprises a trigger and a switch piece arranged in the shell, the safety switch is movably installed on the shell, and the safety switch is provided with a second limiting part; the button is arranged on the shell in a pressing mode. The safety switch can be pushed by external force to move from the abutting position to the open position. When the safety switch is located at the abutting position, the second limiting part abuts against the first limiting part, so that the trigger cannot be pressed down; when the safety switch moves to an open position, the second limiting part is staggered from the first limiting part, so that the trigger can be pressed down and triggers the switch piece; when the trigger triggers the switch piece and is pressed down, the button is connected with the trigger in a buckled mode so as to lock the position of the trigger, and when the trigger is pressed down again, the button releases the buckle with the trigger and resets. The trigger of the electric tool can be prevented from being triggered by mistake, and self-locking of the trigger can be achieved.

Description

Technical Field

[0001] The utility model relates to an electric tool, in particular to a switch structure of the electric tool. Background Art

[0002] Most existing power tools are not equipped with a switch structure to prevent misoperation, which poses certain safety hazards during use, especially the risk of misoperation by children. Once a child presses the trigger of the power tool by mistake, causing the power tool to work abnormally, an accident may occur. Some power tools are equipped with a switch structure to prevent misoperation, but lack a trigger self-locking function, requiring the operator to continuously press the trigger for the power tool to work, which brings inconvenience to use. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a switch structure of an electric tool, which can prevent the trigger of the electric tool from being triggered by mistake and can realize the self-locking of the trigger.

[0004] Another technical problem to be solved by the utility model is to provide an electric tool.

[0005] The switch structure of the electric tool of the embodiment of the utility model comprises a shell and a switch assembly, the switch assembly comprises a trigger that can be pressed on the shell and a switch member arranged inside the shell; the trigger is provided with a first limiting portion; the switch structure also comprises a safety switch and a button; the safety switch is movably installed on the shell, and the safety switch is provided with a second limiting portion that cooperates with the first limiting portion; the button is pressably arranged on the shell; the safety switch can be moved from the interference position to the open position under the push of external force; when the safety switch is in the interference position, the second limiting portion abuts against the first limiting portion so that the trigger cannot be pressed; when the safety switch moves to the open position, the second limiting portion offsets the first limiting portion so that the trigger can be pressed and trigger the switch member; when the button is pressed after the trigger triggers the switch member, it is connected with the trigger buckle to lock the position of the trigger, and the button is released from the buckle with the trigger and reset when the trigger is pressed again.

[0006] The electric tool of the embodiment of the utility model comprises the switch structure mentioned above.

[0007] The utility model has at least the following advantages:

[0008] 1. The embodiment of the utility model is provided with a safety switch, which can prevent the trigger from being pressed when the safety switch is not pressed, thereby preventing the trigger from being misoperated, thereby improving the safety of the power tool;

[0009] 2. The embodiment of the utility model is provided with a button. When the button is pressed after the trigger triggers the switch, it is connected with the trigger buckle to lock the position of the trigger, so that the operation of the power tool can be maintained without the operator having to press the trigger all the time, which facilitates the use of the power tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 An exploded schematic diagram of a switch structure of an electric tool according to an embodiment of the utility model is shown.

[0011] Figure 2 and Figure 3 The schematic diagram of the appearance and the schematic diagram of the internal structure of the switch structure according to an embodiment of the utility model when the safety switch is in the interference position are respectively shown.

[0012] Figure 4 and Figure 5 The diagrams respectively show the appearance and cross-sectional view of the switch structure according to an embodiment of the present utility model when the trigger and the button are in a non-pressed state.

[0013] Figure 6 and Figure 7 The schematic diagram of the appearance and the schematic diagram of the internal structure of the switch structure according to an embodiment of the utility model when the safety switch is in the open position are respectively shown.

[0014] Figure 8 and Fig. 9 The schematic diagram and the cross-sectional diagram respectively show the appearance of the switch structure according to an embodiment of the utility model when the trigger and the button are in a pressed state. DETAILED DESCRIPTION

[0015] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Please refer to Figures 1 to 9 The switch structure of the electric tool according to the embodiment of the utility model comprises a housing 1 , a switch assembly, a safety switch 3 , a button 4 , a first elastic reset element 51 , a second elastic reset element 52 and a third elastic reset element 53 .

[0017] In this embodiment, the shell 1 is made of plastic. The shell 1 is composed of a left shell 1a and a right shell 1b that are matched with each other. The left shell 1a and the right shell 1b are detachably connected together by a plurality of screws.

[0018] The switch assembly includes a trigger 21 that can be pressed on the housing 1 and a switch member 22 that is arranged inside the housing 1. Specifically, the housing 1 is provided with an opening 10 that matches the trigger 21, the rear portion of the trigger 21 extends into the opening 10, and the bottom of the rear portion of the trigger 21 is provided with a stopper 210 extending downward, and the stopper 210 abuts against the inner wall of the housing below the opening 10 to prevent the rear portion of the trigger 21 from escaping from the opening 10. The trigger 21 is also provided with a first limiting portion 211, a first convex rib 212 protruding into the interior of the housing, and a second convex rib 213 protruding into the interior of the housing. The first elastic reset element 51 is arranged between the trigger 21 and the housing 1. The first convex rib 212 is provided with a through groove 2120 extending along the pressing direction of the trigger. The second convex rib 213 is movably inserted into the guide groove 13 provided in the housing 1, and is used to guide the movement of the trigger 21.

[0019] The switch member 22 is disposed inside the housing 1 and is opposite to the trigger 21. When the switch member 22 is triggered, the electric tool is started and starts to work. In this embodiment, the switch member 22 is a micro switch, and a switch button 221 is provided on the micro switch. The trigger 21 is provided with a resisting portion 214 that cooperates with the switch button 221 to trigger the switch member 22.

[0020] The safety switch 3 is movably mounted on the housing 1 , and the safety switch 3 is provided with a second limiting portion 32 matched with the first limiting portion 211 .

[0021] In this embodiment, the first limit portion 211 is formed by a first protrusion disposed on the trigger and protruding toward the inside of the housing 1, and the second limit portion 32 is formed by a second protrusion disposed on the surface of the safety switch. The second elastic reset element 52 is disposed between the safety switch 3 and the housing 1. Specifically, the safety switch 3 includes a crossbar 3a and a vertical bar 3b; the crossbar 3a can move laterally through the housing 1, the first limit portion 211 is disposed on the crossbar 3a; the top of the vertical bar 3b is connected to the bottom of the crossbar 3a, one end of the second elastic reset element 52 is connected to the vertical bar 3b, and the other end of the second elastic reset element 52 is connected to the housing 1.

[0022] The button 4 is pressably disposed on the housing 1. In this embodiment, the third elastic reset element 53 is disposed between the button 4 and the housing 1 to reset the button 4. Preferably, the first elastic reset element 51, the second elastic reset element 52 and the third elastic reset element 53 are all springs.

[0023] The safety switch 3 can be moved from the interference position to the open position under the push of external force. When the safety switch 3 is in the interference position, Figure 2 and Figure 3 As shown, the second limiting portion 32 abuts against the first limiting portion 211 so that the trigger 21 cannot be pressed down, as shown in FIG. Figure 5 As shown (the direction of pressing is as Figure 4 As shown by the arrow C in the figure, this prevents the trigger from being triggered by mistake and improves the safety of the power tool. Figure 6 and Figure 7 As shown (the direction of pressing the safety switch 3 is as follows Figure 2 and Figure 6 As shown by arrow B in FIG. 1 , the direction of arrow A is opposite to the direction of arrow B, and the safety switch 3 cannot be pressed down along the direction of arrow A. The second limiting portion 32 is offset from the first limiting portion 211, so that the trigger 21 can be pressed down and trigger the switch member 22 through the contact portion 214, thereby starting the power tool to work. Figure 8 In this case, since the trigger 21 has not yet achieved self-locking, the operator needs to keep pressing the trigger 21 by hand. In this embodiment, when the safety switch 3 moves to the open position and the trigger 21 is pressed down and triggers the switch member 22, the first limit portion 211 is on the path of the safety switch 3 moving from the open position to the interference position, so that the second limit portion 32 of the safety switch 3 is blocked and interfered by the first limit portion 211 of the trigger 2, resulting in the safety switch 3 being unable to reset.

[0024] Please refer to Fig. 9 When the button 4 is pressed after the trigger 21 triggers the switch 22, it is snap-connected with the trigger 21 to lock the position of the trigger 21. Specifically, a protrusion 41 extending in the radial direction is provided at the top of the button 4. When the button 4 is pressed after the trigger 21 triggers the switch 22, the protrusion 41 passes through the through groove 2120 of the first rib 212 and buckles the back of the first rib 212 to snap-connect with the trigger 21. At this time, the self-locking of the trigger 21 is achieved, and the operator removes his finger from the trigger 21 and the safety switch, and the power tool continues to operate.

[0025] When the trigger 21 is pressed again, the button 4 is released from the locking of the trigger 21 (the protrusion 41 withdraws from the through groove 2120 of the first rib 212), and the button 4 is reset under the elastic force of the third elastic reset element 53. At this time, the self-locking of the trigger 21 is released, and the trigger 21 is reset under the elastic force of the first elastic reset element 51, and the safety switch 3 is automatically reset under the elastic force of the second elastic reset element 52 because the first limit portion 211 of the trigger 2 is no longer blocked.

[0026] Another embodiment of the utility model provides an electric tool, which includes the aforementioned switch structure. In a specific application, the electric tool is a heat gun.

[0027] The utility model can prevent the trigger of the electric tool from being triggered by mistake and can realize the self-locking of the trigger, thereby improving the use safety of the electric tool.

[0028] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A switch structure of an electric tool, comprising a housing and a switch assembly, wherein the switch assembly comprises a trigger pressably arranged on the housing and a switch member arranged inside the housing; characterized in that: The trigger is provided with a first limiting portion; The switch structure further comprises a safety switch and a button; the safety switch is movably mounted on the housing, and is provided with a second limiting portion cooperating with the first limiting portion; the button is pressably arranged on the housing; The safety switch can be moved from the interference position to the open position under the push of an external force; when the safety switch is in the interference position, the second limiting portion abuts against the first limiting portion, so that the trigger cannot be pressed down; When the safety switch moves to the open position, the second limiting portion is offset from the first limiting portion, so that the trigger can be pressed down and trigger the switch member; When the button is pressed after the trigger triggers the switch, it is connected with the trigger buckle to lock the position of the trigger. When the trigger is pressed again, the button is released from the buckle with the trigger and reset.

2. The switch structure of the electric tool according to claim 1, characterized in that: The switch assembly includes a first elastic reset element, and the first elastic reset element is arranged between the trigger and the housing.

3. The switch structure of the electric tool according to claim 2, characterized in that: The first limiting portion is composed of a first protrusion disposed on the trigger and protruding toward the interior of the housing, and the second limiting portion is composed of a second protrusion disposed on the surface of the safety switch.

4. The switch structure of the electric tool according to any one of claims 1 to 3, characterized in that: The switch structure comprises a second elastic reset element, which is arranged between the safety switch and the housing and is used to reset the safety switch from the open position to the interference position.

5. The switch structure of the electric tool according to claim 4, characterized in that: The safety switch comprises a horizontal bar and a vertical bar; The cross bar can be laterally moved through the shell, and the first limiting portion is arranged on the cross bar; the top of the vertical bar is connected to the bottom of the cross bar, one end of the second elastic reset element is connected to the vertical bar, and the other end of the second elastic reset element is connected to the shell.

6. The switch structure of the electric tool according to claim 4, characterized in that: When the safety switch moves to the open position and the trigger is pressed down to trigger the switch member, the first limiting portion is located on the path of the safety switch moving from the open position to the interference position to prevent the safety switch from resetting.

7. The switch structure of the electric tool according to claim 1, characterized in that: The switch structure comprises a third elastic reset element, which is arranged between the button and the housing to reset the button.

8. The switch structure of the electric tool according to claim 7, characterized in that: The trigger is provided with a first convex rib protruding toward the interior of the housing, and the first convex rib is provided with a through groove extending along the pressing direction of the trigger; A protrusion extending radially is provided at the top of the button. When the button is pressed after the trigger triggers the switch member, the protrusion passes through the through groove and buckles the back of the first rib to be buckled with the trigger.

9. The switch structure of the electric tool according to claim 1, characterized in that: The switch element is a micro switch.

10. An electric tool, characterized in that: The electric tool comprises the switch structure according to any one of claims 1 to 9.

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