A power tool

Abstract

The present invention relates to an electric tool, comprising a housing, a trigger mechanism assembled to the housing, and a switch. The trigger mechanism comprises a main body, an unlocking portion, a connecting rod, and a locking portion. The main body has a pressing operation portion, the connecting rod is accommodated in the pressing operation portion, the unlocking portion and the locking portion are respectively hingedly connected to the two ends of the connecting rod, and the unlocking portion and the locking portion are respectively hingedly connected to the pressing operation portion, and the unlocking portion can pivot between a locked position and an unlocked position. When the unlocking portion is in the locked position, the locking portion restricts the pressing operation portion from moving toward one side of the switch. When the unlocking portion is in the unlocked position, the operational restriction on the pressing operation portion is released, allowing a switch trigger in the pressing operation portion to trigger the switch to start. The electric tool having the trigger mechanism can eliminate the possibility of switch mis-triggering caused by factors such as elastic deformation of the trigger without adding an additional safety electronic switch device or providing special reinforcement components, thereby improving the service life of the trigger mechanism.

Description

Technical Field

[0001] The present application relates to the field of electric tools, and in particular to an electric tool with a trigger mechanism. Background Art

[0002] In power tools, such as angle grinders, pressing an operating component, such as a trigger mechanism, on the housing turns on a switch housed within the housing, thereby driving the motor. The trigger mechanism is often also equipped with a lock release component. This lock release component abuts the housing, preventing the trigger mechanism from being pressed, thereby maintaining the switch in the off state and preventing the trigger mechanism from being accidentally pressed to turn the switch on. When using the power tool, the operator must first move the lock release component to a position where it does not interfere with the housing before pressing the trigger mechanism to activate the switch and start the motor.

[0003] However, due to the length of the trigger mechanism, it may bend after being pressed multiple times, causing the trigger mechanism to be pressed to turn on the switch without being unlocked by the lock release component. Therefore, it is necessary to improve the trigger mechanism to strengthen it and prevent the trigger mechanism from bending and causing false triggering. Summary of the Invention

[0004] The present invention relates to an electric tool, the trigger mechanism of which can avoid mis-triggering due to bending.

[0005] The electric tool comprises a housing, a trigger mechanism assembled on the housing, a switch, and a switch triggering member for triggering the switch, wherein the trigger mechanism comprises:

[0006] A main body, the main body having a press operation portion, the press operation portion being provided with a receiving groove, and the switch trigger being provided in the receiving groove;

[0007] an unlocking portion hingedly connected to the pressing operation portion and capable of pivoting between a locked position and an unlocked position;

[0008] a connecting rod, the connecting rod being disposed in the receiving groove of the pressing operating portion, the connecting rod having a first hinge end and a second hinge end, the first hinge end of the connecting rod being hingedly connected to the unlocking portion, the connecting rod having a through hole located between the first hinge end and the second hinge end, and the switch trigger passing through the through hole of the connecting rod;

[0009] a locking portion, the locking portion being hingedly connected to the pressing operation portion, the locking portion being hingedly connected to the second hinged end of the connecting rod;

[0010] The unlocking portion restricts operation of the pressing operation portion when the unlocking portion is located at the locking position, and releases the restriction on operation of the pressing operation portion when the unlocking portion is located at the unlocking position.

[0011] Furthermore, when the unlocking portion is located at the locking position, the locking portion prevents the pressing operating portion from moving toward the switching direction.

[0012] Further, when the unlocking portion is located at the locking position, the locking portion abuts against the shell; when the unlocking portion is located at the unlocking position, the unlocking portion and the locking portion are disengaged from the shell.

[0013] Furthermore, when the electric tool is placed horizontally, when the unlocking portion is in the locked position, the second hinged end of the connecting rod is higher than the first hinged end; when the unlocking portion is in the unlocked position, the first hinged end of the connecting rod is higher than the second hinged end.

[0014] Furthermore, the through hole of the connecting rod has a first section extending in a horizontal direction toward the first hinge end, and a second section extending toward the second hinge end, and the first section and the second section are connected.

[0015] Furthermore, when the unlocking portion is located in the locking position, the switch trigger is at least partially located in the first section of the through hole of the connecting rod; when the unlocking portion is located in the unlocking position, the switch trigger is at least partially located in the second section of the through hole of the connecting rod.

[0016] Furthermore, the pressing operation portion is further provided with a through hole, and when the unlocking portion is located at the locking position, at least a portion of the unlocking portion passes through the through hole and protrudes from the pressing operation portion.

[0017] Furthermore, the unlocking portion is hinged to the pressing operation portion via a pin, and a torsion spring is provided on the pin.

[0018] Furthermore, a pivot shaft is provided at one end of the main body away from the pressing operation portion, the main body is connected to the housing via the pivot shaft, and the main body can pivot with the pivot shaft as the rotation center.

[0019] Furthermore, an elastic member is provided between the main body and the shell.

[0020] Beneficial effects

[0021] The trigger mechanism in this power tool utilizes a connecting rod that interlocks with the unlocking portion and a locking portion that interlocks with the connecting rod, enabling the three to move synchronously to switch the trigger mechanism between locked and unlocked positions. When the unlocking portion is in the locked position, both the unlocking and locking portions simultaneously abut against the housing to restrict the movement of the trigger. This strengthens the trigger and prevents the trigger mechanism from bending due to excessive use, which could lead to accidental triggering of the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of an electric tool according to an embodiment of the present invention;

[0023] Figure 2 is an internal schematic diagram of an embodiment of the present invention when the unlocking portion is in the locked position;

[0024] Figure 3 is an internal schematic diagram of an embodiment of the present invention when the unlocking portion is in the unlocking position;

[0025] Figure 4 is a schematic diagram of the interior of a switch in an embodiment of the present invention in which the pressing operation portion is pressed to trigger the switch;

[0026] Figure 5 is a schematic diagram of a trigger mechanism in an embodiment of the present invention;

[0027] Figure 6 Schematic diagram of the connection between the unlocking part, the connecting rod and the locking part in an embodiment of the present invention.

[0028] Power tool 100; housing 1; switch 11; blocking rib 12; angle grinder head 2; battery pack 3; trigger mechanism 4; main body 40; pivot shaft 401; pressing operation portion 41; receiving slot 410; switch trigger member 411; through hole 412; front side wall 4121; upper surface 413; lower surface 414; elastic member 42;

[0029] Unlocking portion 43; groove 430; first pin 431; torsion spring 432; upper end surface 433; toggle key 434; front end surface 4341; rear arc surface 4342; connecting key 435;

[0030] Connecting rod 44; first hinge end 441; wings 4410, 4411; second pin 4412; second hinge end 442; third pin 4421; connecting section 443; through hole 444; first section 4441; second section 4442;

[0031] Locking portion 45; fan portions 450, 451; first end surface 4511; second end surface 4512; fourth pin shaft 452. DETAILED DESCRIPTION

[0032] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different drawings represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with this application.

[0033] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, technical or scientific terms used in this application should have the same ordinary meaning as those of ordinary skill in the art to which this invention belongs. The terms "first," "second," and similar terms used in this application do not denote any order, quantity, or importance, but are simply used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather denote the presence of at least one. "Multiple" or "several" means two or more. Unless otherwise indicated, terms such as "front," "rear," "lower," and / or "upper" are used for convenience only and are not intended to limit a position or spatial orientation. Terms such as "include" or "comprising" mean that the elements or objects listed before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," "said," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0034] The present invention relates to an electric tool, which is an angle grinder in this embodiment. Figure 1 As shown, the angle grinder includes a shell 1 assembled from two left and right half shells, and a switch 11, a motor and other devices are arranged in the shell 1. The shell 1 is also used as a handle for holding. Taking the straight line where the axis of the shell 1 is located as the front-to-back direction, an angle grinder head 2 is arranged in front of the shell 1, and the motor in the shell 1 is used to drive the angle grinder head 2. A battery pack 3 is arranged at the rear of the shell 1, and the battery pack 3 is used to power the motor. The vertical direction perpendicular to the axial direction of the shell 1 is the up-down direction, and the straight line perpendicular to the front-to-back direction and the up-down direction is the left-right direction. A trigger mechanism 4 is arranged below the shell 1. The trigger mechanism 4 is used to start the angle grinder.

[0035] In this embodiment, if Figure 2As shown, the trigger mechanism 4 includes a main body 40. The main body 40 has a pressing operation portion 41 extending in the front-to-back direction. The pressing operation portion 41 is for the user to press to trigger the switch 11 to start the angle grinder. The pressing operation portion 41 is arranged in the rear direction of the main body 40, and a pivot shaft 401 is provided at the front end of the main body 40 away from the pressing operation portion 41. The two ends of the pivot shaft 401 are respectively hingedly connected to the left and right half shells. Thus, the main body 40 is connected to the housing 1 via the pivot shaft 401, and the main body 40 can pivot with the pivot shaft 401 as the rotation center, so that the main body 40 can rotate within a certain range in the up and down directions.

[0036] Combine Figure 2 and Figure 5 As shown, the pressing portion 41 is provided with a receiving groove 410, and a switch trigger 411 is disposed in the receiving groove 410. The switch trigger 411 extends upward from the bottom of the pressing portion 41. The main body 40 rotates about the pivot axis 401, causing the pressing portion 41 to move toward the switch 11, thereby enabling the switch trigger 411 to trigger the switch 11.

[0037] The trigger mechanism 4 further includes an unlocking portion 43, a connecting rod 44, and a locking portion 45. The unlocking portion 43 is hingedly connected to the pressing operation portion 41, and the unlocking portion 43 is pivotable between a locking position and an unlocking position.

[0038] The connecting rod 44 is disposed within the receiving slot 410 of the pressing portion 41. The connecting rod 44 has a first hinged end and a second hinged end. The first hinged end of the connecting rod 44 is hingedly connected to the unlocking portion 43, and the second hinged end is hingedly connected to the locking portion 45. The connecting rod 44 has a through hole 444 located between the first and second hinged ends. The switch trigger 411 passes through the through hole 444 of the connecting rod 44. The locking portion 45 is also hingedly connected to the pressing portion 41.

[0039] When the unlocking portion 43 is in the locked position, the operation of the pressing portion 41 is restricted, and the switch trigger 411 cannot touch the switch 11. When the unlocking portion 43 is in the unlocked position, the operation restriction on the pressing portion 41 is released, and the pressing portion 41 can be operated so that the switch trigger 411 triggers the start switch 11.

[0040] like Figure 6As shown, the unlocking portion 43, connecting rod 44, and locking portion 45 in the trigger mechanism 4 form a linked structure. The unlocking portion 43 can pivot to drive the connecting rod 44 to rotate, which in turn drives the locking portion 45 to rotate. When the unlocking portion 43 is in the locked position, the unlocking portion 43 and the locking portion 45 simultaneously abut against the housing 1, preventing the pressing operation portion 41 from being pressed. In other words, the locking portion 45 prevents the pressing operation portion 41 from moving toward the switch 11. Therefore, the switch trigger 411 cannot trigger the start switch 11, and the angle grinder cannot be started.

[0041] When the unlocking portion 43 is located at the unlocking position, Figure 2 As shown, the unlocking portion 43 and the locking portion 45 are disengaged from the housing 1, allowing the pressing portion 41 to be pressed. Therefore, the pressing portion 41 can be pressed toward one side of the switch 11, driving the switch trigger 411 to trigger the start switch 11, and the angle grinder can be started.

[0042] The trigger mechanism 4 has a linkage structure formed by the unlocking member, the connecting rod 44 and the locking portion 45. When in the locked position, the unlocking portion 43 and the locking portion 45 simultaneously abut the housing 1 to limit the movement of the pressing operating portion 41. In addition, the connecting rod 44 can enhance the strength of the pressing operating portion 41. Therefore, the power tool with the trigger mechanism 4 does not need to add an additional safety electronic switch device or set special reinforcement components to avoid the switch 11 being accidentally triggered and started due to factors such as the elastic deformation of the trigger mechanism.

[0043] Specifically, a blocking rib 12 is provided in the housing 1. The pressing operation portion 41 is further provided with a through hole 412 near the pivot shaft 401, and the unlocking portion 43 can be partially accommodated in the through hole 412. The unlocking portion 43 has a groove 430, and the two side walls forming the groove 430 respectively have first pin 431 holes. The first pin 431 passes through the first pin 431 hole to hinge the unlocking portion 43 to the pressing operation portion 41. A torsion spring 432 is provided on the first pin 431 to facilitate the reset of the unlocking portion 43. An upper end surface 433 is provided above the first pin 431 hole, and a toggle key 434 is provided below the first pin 431 hole.

[0044] The unlocking portion 43 also has a connecting key 435 at its rear. When the unlocking portion 43 is in the locked position, the upper end surface 433 of the unlocking portion 43 protrudes beyond the upper surface 413 of the pressing portion 41, and the toggle key 434 of the unlocking portion 43 extends from the through-hole 412, thereby protruding beyond the lower surface 414 of the pressing portion 41. Furthermore, at this point, the upper end surface 433 of the unlocking portion 43 abuts against the blocking rib 12 within the housing 1, restricting movement of the pressing portion 41.

[0045] The toggle button 434 of the unlocking portion 43 has a front end surface 4341 and a rear curved surface 4342 in the front-to-back direction. The through hole 412 of the pressing operation portion 41 has a front side wall 4121 in the front-to-back direction. When the unlocking portion 43 is in the locked position, the front end surface 4341 of the toggle button 434 abuts against the front side wall 4121 of the through hole 412, thereby limiting the range of forward pivoting of the unlocking portion 43 and maintaining the upper end surface 433 of the unlocking portion 43 in abutment with the blocking rib 12 of the housing 1.

[0046] according to Figure 5 and Figure 6 As shown, the connecting rod 44 has a first hinged end 441 hingedly connected to the unlocking portion 43, a second hinged end 442 hingedly connected to the locking portion 45, and a connecting section 443 connecting the first hinged end 441 and the second hinged end 442. The connecting section 443 has a through hole 444 to avoid the switch trigger 411. The first hinged end 441 of the connecting rod 44 has two wings 4410 and 4411. The connecting key 435 of the unlocking portion 43 extends between the two wings 4410 and 4411 of the first hinged end 441. Pin holes are respectively provided in the connecting key 435 and the two wings 4410 and 4411. A second pin 4412 is sequentially inserted through the pin holes in the wings 4410 and 4411 of the first hinged end 441 and the connecting key 435 of the unlocking portion 43 to connect the unlocking portion 43 to the connecting rod 44.

[0047] The second hinged end 442 of the connecting rod 44 is hingedly connected to the locking portion 45 via a third pin 4421. In this embodiment, the second hinged end 442 of the connecting rod 44 is located above and behind the first hinged end 441. That is, when the angle grinder 100 is placed horizontally, when the unlocking portion 43 is in the locked position, the second hinged end 442 of the connecting rod 44 is higher than the first hinged end 441. When the unlocking portion 43 is in the unlocked position, the unlocking portion 43 pivots clockwise to drive the connecting rod 44 to move, so that the first hinged end 441 of the connecting rod 44 is higher than the second hinged end 442. The through hole 444 of the connecting rod 44 has a first section 4441 extending horizontally toward the first hinged end 441, and a second section 4442 extending toward the second hinged end, and the first section 4441 and the second section 4442 are connected.

[0048] The locking portion 45 is hinged to the pressing operating portion 41 via a fourth pin 452, and the locking portion 45 can rotate about the fourth pin 452. The locking portion 45 has two identical and parallel fan portions 450 and 451, and the second hinge end 442 of the connecting rod 44 is inserted between the two fan portions 450 and 451. The two fan portions 450 and 451 of the locking portion 45 and the second hinge end 442 of the connecting rod 44 are respectively provided with pin holes. The third pin 4421 passes through the fan portions 450, 451 and the second hinge end 442 of the locking portion 45 in sequence to achieve a hinged connection between the connecting rod 44 and the locking portion 45. The two fan portions 450 and 451 have a first end face 4511 that can abut against the blocking rib 12 of the housing 1, and a second end face 4512 that can avoid the housing 1.

[0049] When the unlocking portion 43 is in the locked position, the first hinged end 441 of the connecting rod 44 and the first section 4441 of the through hole 444 are received in the receiving groove 410 of the pressing operating portion 41, and the switch trigger 411 at least partially passes through the first section 4441 of the through hole 444 of the connecting rod 44. At this time, the upper end surface 433 of the unlocking portion 43 and the first end surface 4511 of the locking portion 45 simultaneously abut against the blocking rib 12 of the housing 1, thereby restricting the movement of the pressing operating portion 41 and preventing the switch trigger 411 from triggering the switch 11.

[0050] To transition the unlocking portion 43 from the locked position to the unlocked position, simply move the toggle key 434 of the unlocking portion 43 rearward. The unlocking portion 43 rotates clockwise about the first pin 431, causing the toggle key 434 and upper end surface 433 of the unlocking portion 43 to be received within the through-hole 412 of the pressing portion 41. The connecting key 435 of the unlocking portion 43 then rotates from the rear to the top, thereby driving the hinged connecting rod 44 and the locking portion 45 hinged to the connecting rod 44. The locking portion 45 rotates about the fourth pin 452 until the second end surface 4512 faces upward.

[0051] When the unlocking portion 43 is located at the unlocking position, Figure 3 As shown, the second hinged end 442 of the connecting rod 44 and the second section 4442 of the through hole 444 are received in the receiving groove 410 of the pressing operation part 41, and the switch trigger 411 at least partially passes through the second section 4442 of the through hole 444 of the connecting rod 44. At this time, the upper end surface 433 of the unlocking part 43 is received in the through hole 412 of the pressing operation part 41, and the first end surface 4511 of the locking part 45 faces the receiving groove 410 of the pressing operation part 41. Figure 4As shown, the connecting key 435 of the unlocking portion 43, the connecting rod 44 and the second end surface 4512 of the locking portion 45 can all avoid the shell 1, and the pressing operation portion 41 and the shell 1 have movable space in the up and down directions, so the user can press the pressing operation portion 41 to make the pressing operation portion 41 rotate around the pivot axis 401, driving the switch trigger 411 to move upward to trigger the switch 11.

[0052] An elastic member 42, in this embodiment a spring, is disposed between the main body 40 and the housing 1. When operating the push-operating portion 41, the user must overcome the elastic force of the elastic member 42 to cause the switch trigger 411 to trigger the switch 11. When the user releases the force exerted on the push-operating portion 41, the push-operating portion 41 automatically resets, thereby disconnecting the switch 11.

[0053] The above description is merely a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with this profession can make slight changes or modifications to equivalent embodiments with equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. An electric tool, characterized in that: The device comprises a housing, a trigger mechanism assembled on the housing, a switch, and a switch triggering member for triggering the switch, wherein the trigger mechanism comprises: A main body, the main body having a press operation portion, the press operation portion being provided with a receiving groove, and the switch trigger being provided in the receiving groove; an unlocking portion hingedly connected to the pressing operation portion and capable of pivoting between a locked position and an unlocked position; a connecting rod, the connecting rod being disposed in the receiving groove of the pressing operation portion, the connecting rod having a first hinge end and a second hinge end, the first hinge end of the connecting rod being hingedly connected to the unlocking portion, the connecting rod having a through hole located between the first hinge end and the second hinge end, and the switch trigger passing through the through hole of the connecting rod; a locking portion, the locking portion being hingedly connected to the pressing operation portion and hingedly connected to the second hinged end of the connecting rod; The unlocking portion restricts operation of the pressing operation portion when the unlocking portion is located at the locking position, and releases the restriction on operation of the pressing operation portion when the unlocking portion is located at the unlocking position.

2. The electric tool according to claim 1, wherein: When the unlocking portion is located at the locking position, the locking portion prevents the pressing operation portion from moving toward the switching direction.

3. The electric tool according to claim 1, wherein: When the unlocking portion is located at the locking position, the locking portion is in conflict with the housing; when the unlocking portion is located at the unlocking position, the unlocking portion and the locking portion are disengaged from the housing.

4. The electric tool according to claim 1, wherein: When the electric tool is placed horizontally, when the unlocking portion is in the locked position, the second hinged end of the connecting rod is higher than the first hinged end; when the unlocking portion is in the unlocked position, the first hinged end of the connecting rod is higher than the second hinged end.

5. The electric tool according to claim 4, characterized in that The through hole of the connecting rod has a first section extending toward the first hinge end and in a horizontal direction, and a second section extending toward the second hinge end, and the first section and the second section are connected.

6. The electric tool according to claim 5, wherein: When the unlocking portion is in the locking position, the switch trigger is at least partially located in the first section of the through hole of the connecting rod; when the unlocking portion is in the unlocking position, the switch trigger is at least partially located in the second section of the through hole of the connecting rod.

7. The electric tool according to claim 1, wherein: The pressing operation portion is further provided with a through hole. When the unlocking portion is located at the locking position, at least a portion of the unlocking portion passes through the through hole and protrudes from the pressing operation portion.

8. The electric tool according to claim 1, wherein: The unlocking portion is hinged to the pressing operation portion via a pin shaft, and a torsion spring is provided on the pin shaft.

9. The electric tool according to claim 1, wherein: A pivot shaft is provided at one end of the main body away from the pressing operation portion. The main body is connected to the housing via the pivot shaft. The main body can pivot around the pivot shaft as a rotation center.

10. The electric tool according to claim 1, wherein: An elastic member is provided between the main body and the shell.

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