CN215201851U

CN215201851U - Head-replaceable electric tool with safety mechanism

Info

Publication number: CN215201851U
Application number: CN202023144062.XU
Authority: CN
Inventors: 吕振强; 吕建
Original assignee: Jinhua Dalu Technology Co ltd
Current assignee: Jinhua Dalu Technology Co ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-12-17
Anticipated expiration: 2030-12-23

Abstract

The utility model provides a first electric tool can change with safety mechanism. It has solved the easy unexpected problem that starts of handheld electric tool. The utility model discloses a rotate the locking element joint that sets up in the instrument body on the interlock portion of button, do not install or the working head is after the installation when the working head, the unexpected touch button of user, locking element passes through the locking surface lock on the interlock face of interlock portion, the realization is to the locking of button, the button can't be pressed, effectively avoid the unexpected start of instrument, when needs use tool body, install the working head on tool body, press the unblock piece, make the unblock piece to the locking element direction remove with the locking element on trigger the inclined plane contact, the front end of unblock piece drive locking element rotates around the back shaft and makes locking element's rear end break away from interlock portion, press the button this moment and can start tool body, the security is higher during the use.

Description

Head-replaceable electric tool with safety mechanism

Technical Field

The utility model discloses equipment belongs to electric tool technical field, in particular to interchangeable head electric tool with safety mechanism.

Background

From the outset, power tools have improved performance and provide convenience to craftsmen. In recent years, advances in portable energy technology have led to the incorporation of the increased operational performance provided by power tools into handheld, and often cordless, configurations. These hand-held power tools add flexibility and freedom of use to the operator and increase efficiency for the craftsman. Hand-held power tools typically include a body, a trigger switch, a working head, and a motor that moves the tool head in a desired direction.

To further increase the ease and flexibility of use, some hand-held power tools have been modified to allow for interchangeable tool heads. By allowing interchangeability, different types of work heads, such as drills or driving tools, circular saws, sanders, or narrow blade saws, can be operated with the same body and motor.

After the working head is connected with the machine body, the current direction of a switch in the tool handle can be selectively controlled through the control mechanism. Generally, according to the control mechanism, the hand-held tool can automatically switch the needed motor steering according to the type of the working head so as to meet the requirements of different operations, however, the tool can cause the accidental starting of the electric hand-held tool, and the accidental starting undoubtedly forms a potential safety hazard in the process of not installing the working head or installing the working head. If the tool is used when the working head is replaced, the abrasion of the tool coupling is increased, the tool is not beneficial to the long-term safe use, and the prior art has the improvement.

Disclosure of Invention

The utility model discloses equipment is not enough to the easy unexpected start-up of current handheld electric tool, provides a interchangeable head electric tool with safety mechanism.

The invention aims to be realized by the following technical scheme: an electric tool with replaceable head and a safety mechanism comprises a tool body and a replaceable working head, wherein a switch body for controlling the tool body to start is fixedly arranged on the tool body, a button is movably arranged on the switch body, the electric tool is characterized in that a locking element for locking the button is movably arranged in the tool body, an installation shaft is fixedly arranged on the locking element, the locking element is rotatably arranged in the tool body through the installation shaft, an occlusion part is fixedly arranged at the upper end of the button, one end of the locking element is buckled on the occlusion part and is the rear end of the locking element, a matching convex part for driving the front end of the locking element to rotate around the installation shaft to enable the rear end of the locking element to be separated from the occlusion part is arranged at the lower end of the working head, an unlocking block capable of driving the locking element to rotate is arranged on the matching convex part, the tool body is internally provided with a return spring which drives the front end of the locking element to rotate around the mounting shaft so that the rear end of the locking element can be reset and locked on the occlusion part.

Preferably, one end of the occlusion part, which is matched with the locking element, is provided with an occlusion surface, and the rear end of the locking element is provided with a locking surface for locking on the occlusion surface.

Preferably, the front end of the locking element is provided with a trigger surface which is contacted with the unlocking block.

Preferably, the trigger surface is provided with a clamping groove for clamping the unlocking block.

Preferably, the switch body is rotatably provided with a reversing block for adjusting the current direction in the switch body, one end of the reversing block, which is far away from the switch body, is fixedly provided with a swinging boss, the tool body is movably provided with a reversing dial button for driving the reversing block to rotate, the reversing dial button is provided with a translation groove which is sleeved on the translation boss, the swinging boss is clamped in the translation groove, the tool body is rotatably provided with a deflection element for locking the reversing dial button, the reversing dial button is fixedly provided with a translation boss, the rear end of the deflection element is provided with a deflection groove for clamping on the translation boss, the reversing dial button can move along the length direction of the reversing dial button and drive the deflection element to rotate with the reversing block, the front end of the deflection element is provided with a deflection contact surface for clamping on the matching boss, the matching convex part is fixedly provided with a fixed block for locking the deflection element, and the deflection triggering surface on the deflection element can be only positioned on one side of the fixed block.

Preferably, the unlocking block can move along the length direction of the matching convex part and drive the locking element to rotate, and the matching convex part is further provided with a working head safety spring for driving the unlocking block to be far away from the matching convex part.

Compared with the prior art, the utility model discloses a rotate the locking element joint that sets up in the instrument body on the interlock portion of button, when the working head is not installed or the working head is after the installation, the unexpected touch button of user, locking element passes through the locking surface lock on the occlusal surface of interlock portion, the realization is to the locking of button, the button can't be pressed, effectively avoid the unexpected start of instrument, when needs use tool body, install the working head on the instrument body, press the unlocking piece, make the unlocking piece remove to the locking element direction and the last inclined plane contact that triggers of locking element, unlocking piece drive locking element's front end rotates around the back shaft and makes locking element's rear end break away from interlock portion, press the button this moment and can start up the instrument body, the security is higher during the use.

Drawings

FIG. 1 is a view of the overall structure of the present invention;

FIG. 2 is a view of the internal structure of the present invention;

FIG. 3 is an exploded view of the structure at the button and locking element;

FIG. 4 is an internal structural view of the unlocking block after being pressed;

FIG. 5 is an enlarged view taken at A in FIG. 4;

fig. 6 is an overall structural view of the yaw element.

The labels in the figure are: 10. a tool body; 12. A switch body; 13. a button; 14. an engaging portion; 15. a return spring; 16. triggering the inclined plane; 17. a locking element; 18. a yaw element; 20. A working head; 21. a mating protrusion; 22. a deflection groove; 24. Swinging the boss; 26. A translation slot; 27. a reversing toggle button; 28. translating the boss; 38. A working head safety spring; 40. A deflection triggering surface; 41. a locking surface; 42. a support shaft; 43. occlusal surface; 44. unlocking the block; 45. a clamping groove; 46. a commutation block; 47. and (5) fixing blocks.

Detailed Description

The invention will be further described with reference to the embodiments shown in the drawings to which: as shown in fig. 1-6, a multi-head power tool with a safety mechanism and a quick-release working head 20 comprises a tool body 10 and a quick-release working head 20, wherein a switch body 12 for controlling the start of the hand-held power tool is fixedly arranged on the tool body 10, a button 13 for controlling the start and the stop of the switch body 12 is arranged on the switch body 12, a locking element 17 for locking the button 13 is movably arranged in the tool body 10, a supporting shaft 42 is fixedly arranged on the locking element 17, the locking element 17 is rotatably arranged in the tool body 10 through the supporting shaft 42, an engaging part 14 is fixedly arranged at the upper end of the button 13, one end of the locking element 17 is fastened on the engaging part 14 and is the rear end of the locking element 17, a matching convex part 21 for driving the front end of the locking element 17 to rotate around the supporting shaft 42 to separate the rear end of the locking element 17 from the engaging part 14 is fixedly arranged at the lower end of the working head 20, the matching convex part 21 is movably provided with an unlocking block 44 which can move along the length direction of the matching convex part 21 and drive the locking element 17 to rotate, the matching convex part 21 is provided with a working head safety spring 38 which drives the unlocking block 44 to be away from the matching convex part 21, and the tool body 10 is also internally provided with a return spring 15 which drives the front end of the locking element 17 to rotate around the support shaft 42 so that the rear end of the locking element 17 is clamped on the occlusion part 14.

The end of the occlusion part 14 far away from the locking element 17 is provided with an occlusion surface 43, and the rear end of the locking element 17 is provided with a locking surface 41 for being clamped on the occlusion surface 43. The locking element 17 is snapped by the snap surface 43 onto the snap surface 43 on the snap 14.

The front end of the locking element 17 is provided with a trigger inclined plane 16 contacting with the unlocking block 44. The unlocking block 44 is firstly contacted with the starting inclined surface on the locking element 17 in the process of moving towards the locking element 17, the triggering inclined surface 16 drives the locking element 17 to rotate around the supporting shaft 42, so that the rear end of the locking element 17 is separated from the occlusion part 14 to complete unlocking, and the unlocking action of the unlocking block 44 driving the locking element 17 to complete unlocking is smoother.

The trigger inclined plane 16 is provided with a clamping groove 45 for clamping the unlocking block 44. After the unlocking of the occlusion part 14 is completed by driving the locking element 17 to rotate, the unlocking block 44 is clamped in the clamping groove 45, so that the unlocking block 44 is prevented from sliding after unlocking is completed, and the use is safer and more reliable.

By turning a locking element 17 provided in the tool body 10 to snap over the snap-in portion 14 of the button 13, when the working head 20 is not installed or the working head 20 is installed, a user accidentally touches the button 13, the locking element 17 is buckled on the occlusal surface 43 of the occlusal part 14 through the locking surface 41 to lock the button 13, the button 13 cannot be pressed down, the accidental start of the tool is effectively avoided, when the tool body 10 needs to be used, the working head 20 is mounted on the tool body 10, the unlocking block 44 is pressed, the unlocking block 44 moves towards the locking element 17 to be in contact with the trigger inclined plane 16 on the locking element 17, the unlocking block 44 drives the front end of the locking element 17 to rotate around the support shaft 42, the rear end of the locking element 17 is separated from the occlusion part 14, the tool body 10 can be started by pressing the button 13 at the moment, the safety is high during use, and the safety of a user and the tool body 10 are effectively protected.

The switch body 12 is rotatably provided with a reversing block 46 for adjusting the current direction in the switch body 12, one end of the reversing block 46, which is far away from the switch body 12, is fixedly provided with a swinging boss 24, the tool body 10 is movably provided with a reversing dial button 27 for driving the reversing block 46 to rotate, the reversing dial button 27 is provided with a translation groove 26 which is sleeved on the swinging boss 24, the swinging boss 24 is clamped in the translation groove 26, the tool body 10 is rotatably provided with a deflection element 18 for locking the reversing dial button 27, the reversing dial button 27 is fixedly provided with a translation boss 28, the rear end of the deflection element 18 is provided with a deflection groove 22 which is clamped on the translation boss 28, the reversing dial button 27 can move along the length direction of the reversing dial button 27 and drive the deflection element 18 and the reversing block 46 to rotate, the front end of the deflection element 18 is provided with a deflection contact face 40 which is clamped on the matching convex part 21, a fixing block 47 for locking the deflection element 18 is fixedly arranged on the matching protrusion 21, and the deflection trigger surface 40 on the deflection element 18 can be located on only one side of the fixing block 47. The direction of current is adjusted through the reversing toggle button 27, the working head 20 is installed on the tool body 10 after the adjustment is completed, at the moment, the deflection triggering surface 40 on the deflection element 18 is only located on one side of the fixed block 47 in the matching convex part 21, the deflection element 18 and the reversing toggle button 27 are locked through the fixed block 47, the tool body 10 is prevented from being damaged due to the fact that the reversing toggle button 27 is touched by mistake in the using process of the tool body 10, and the tool body 10 is safe and reliable in use.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A head-replaceable electric tool with a safety mechanism comprises a tool body (10) and a replaceable working head (20), wherein a switch body (12) for controlling the tool body (10) to start is fixedly arranged on the tool body (10), a button (13) is movably arranged on the switch body (12), and the head-replaceable electric tool is characterized in that a locking element (17) for locking the button (13) is movably arranged in the tool body (10), an installation shaft is fixedly arranged on the locking element (17), the locking element (17) is rotatably arranged in the tool body (10) through the installation shaft, an occlusion part (14) is fixedly arranged at the upper end of the button (13), one end of the locking element (17) is buckled on the occlusion part (14) and is the rear end of the locking element (17), the lower end of the working head (20) is provided with a driving device (17) and the front end of the locking element (17) rotates around the installation shaft to enable the rear end of the locking element (17) to rotate A matching convex part (21) which is separated from the meshing part (14), an unlocking block (44) which can drive the locking element (17) to rotate is arranged on the matching convex part (21), and a return spring (15) which can drive the front end of the locking element (17) to rotate around the mounting shaft so that the rear end of the locking element (17) can be reset and locked on the meshing part (14) is arranged in the tool body (10).

2. The electric tool with the replaceable head and the safety mechanism according to claim 1, wherein the end of the engaging portion (14) which is matched with the locking element (17) is provided with an engaging surface (43), and the rear end of the locking element (17) is provided with a locking surface (41) which is used for being locked on the engaging surface (43).

3. A tool with a replaceable head having a safety mechanism according to claim 2, wherein the front end of the locking element (17) is provided with an actuating surface for contacting the unlocking block (44).

4. The electric tool with the replaceable head and the safety mechanism according to claim 3, wherein the trigger surface is provided with a clamping groove (45) for clamping the unlocking block (44).

5. The electric tool with the replaceable head and the safety mechanism according to claim 1, 2, 3 or 4, wherein the switch body (12) is rotatably provided with a reversing block (46) for adjusting the direction of current in the switch body (12), one end of the reversing block (46) far away from the switch body (12) is fixedly provided with a swinging boss (24), the tool body (10) is movably provided with a reversing toggle button (27) for driving the reversing block (46) to rotate, the reversing toggle button (27) is provided with a translation groove (26) sleeved on the swinging boss (24), the swinging boss (24) is clamped in the translation groove (26), the tool body (10) is rotatably provided with a deflection element (18) for locking the reversing toggle button (27), the reversing toggle button (27) is fixedly provided with a translation boss (28), the rear end of the deflection element (18) is provided with a deflection groove (22) used for being clamped on the translation boss (28), the reversing toggle button (27) can move along the length direction of the reversing toggle button (27) and drive the deflection element (18) and the reversing block (46) to rotate, the front end of the deflection element (18) is provided with a deflection triggering surface (40) used for being clamped on the matching convex part (21), the matching convex part (21) is fixedly provided with a fixing block (47) used for locking the deflection element (18), and the deflection triggering surface (40) on the deflection element (18) can only be located on one side of the fixing block (47).

6. A tool with a changeable head and a safety mechanism according to claim 1, 2, 3 or 4, wherein the unlocking block (44) can move along the length direction of the matching protrusion (21) and drive the locking element (17) to rotate, and the matching protrusion (21) is further provided with a working head safety spring (38) for driving the unlocking block (44) away from the matching protrusion (21).