CN217486965U - Grass trimmer with operation self-locking function - Google Patents

Abstract

The application discloses a grass trimmer with operation self-locking function, which comprises a cutting element, a driving machine head and a handle device, wherein the driving machine head is arranged on the cutting element; the handle device includes: the handle comprises a handle shell, a contact switch, a main control trigger, a safety button and a reset element; the main control trigger and the handle shell form movable connection around a pivot axis so that the active trigger at least has a trigger position for triggering the contact switch and a release position for releasing the contact switch; the safety button and the handle shell form sliding connection along the pressing direction so that the safety button at least has a first position for stopping the main control trigger, a second position for avoiding the main control trigger and a locking position for locking the main control switch at the triggering position; the application has the beneficial effects that the grass trimmer with the operation self-locking function is provided, after the cutting element works, the main control trigger is not required to be continuously pressed, the cutting element can continuously work, so that the fatigue of the hand of a customer is reduced, and the use experience of the customer is improved.

Description

Grass trimmer with operation self-locking function

Technical Field

The application relates to the field of grass trimmers, in particular to a grass trimmer with operation self-locking function.

Background

In the related technical field, the plant cutting part of the grass trimmer is often a cutting line or a cutting sheet, the cutting part rotates at a high speed under the driving of a motor fixed on a grass trimming head, and green plants can be cut and shaped after being cut off; patent number CN206686614U discloses a grass trimmer, including: the extension rod extends lengthways and is provided with a first end and a second end opposite to the first end along the length direction; the machine head is connected with the first end of the extension rod; a handle assembly for operation by an operator, the handle assembly including a first handle and a second handle connected to a second end of the extension pole; the second handle includes at least one operating position including positioning the second handle in a first position that provides resting support for an operator's arm or elbow, the second handle cooperating with the first handle in the first position to enable one-handed operation, the lawnmower having a grass cutting state and an edging state under one-handed operation, the lawnmower further including a battery pack for energizing the head. The utility model can reduce the weight of the motor through direct current driving, thereby realizing the reduction of the weight of the whole grass trimmer; however, when the lawn mower disclosed in the patent document is used, the trigger arranged on the first handle and used for controlling the energization of the cutting blade needs to be continuously pressed to enable the battery pack to continuously supply power to the motor on the handpiece, so that the continuous operation of the cutting blade is realized, and the hand of an operator is fatigued undoubtedly, and the user experience is influenced.

Disclosure of Invention

This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

To solve the technical problems mentioned in the background section above, some embodiments of the present application provide a grass trimmer with operational self-locking, comprising: a cutting element for performing a grass cutting function; the driving machine head is used for driving the cutting element to rotate; a handle device for being held by a user to operate the lawnmower; the handle device includes: the handle comprises a handle shell, a contact switch, a main control trigger, a safety button and a reset element; the contact switch is fixedly arranged in the handle shell, and the main control trigger and the handle shell form movable connection around a pivot axis so that the main control trigger at least has a trigger position for triggering the contact switch and a release position for releasing the contact switch; the safety button and the handle shell form sliding connection along the pressing direction so that the safety button at least has a first position for stopping the main control trigger, a second position for avoiding the main control trigger and a locking position for locking the main control trigger at the triggering position.

Further, the handle housing is provided with a trigger opening to expose at least a portion of the master trigger on the first side of the handle housing.

Further, the handle housing is provided with a button opening to expose at least a portion of the safety button on a second side of the handle housing different from the first side.

Further, the primary trigger is at least partially exposed on a first side of the handle housing and the safety button is at least partially exposed on a second side of the handle housing on a non-opposing side.

Further, the safety button includes: the pressing part is provided with a pressing contact surface for a user to press; the functional part is provided with an avoiding groove and a lock hook structure; the pressing part is arranged on one side of the function part in the pressing direction; the avoidance groove and the lock hook structure are arranged at two different positions of the functional part in the pressing direction.

Further, at least a portion of the latch hook structure forms a notch that avoids the slot.

Further, a portion of the latch hook structure constituting the notch of the escape groove is configured to have at least one inclined plane obliquely intersecting with the pressing direction; the latch hook structure includes: a first stop surface and a first locking surface; the first stop surface and the first locking surface are arranged on two opposite sides of the lock hook structure and are both parallel to the pressing direction; the inclined plane is arranged between the stop surface and the locking surface.

Further, the inner side of the handle shell is provided with an abutting part; the safety button further comprises: a groove portion provided with an element groove; the reset element is constructed as a coil spring and is arranged in the element groove; one end of the reset element is propped against the groove part, and the other end of the reset element is propped against the abutting part; the groove wall of the element groove is provided with an abutting notch so that at least one part of the abutting part is embedded into the element groove.

Further, the master trigger comprises: the force-bearing part is at least partially exposed out of the handle shell; the limiting part is formed on one side of the main control trigger, which is close to the functional part; the limiting part is arranged on one side of the stress part extending into the handle shell; the limiting part comprises a limiting structure which can be matched with the locking hook structure.

Further, limit structure contains: a second stop surface and a second locking surface; the second stop surface and the second locking surface are arranged on two opposite sides of the limiting structure; the first stop surface is in contact with the second stop surface when the safety button is in the first position.

The beneficial effect of this application lies in: the utility model provides a cooperation through safety button and master control trigger presses the master control trigger and makes cutting element work at the user, and safety button can prevent the master control trigger to remove to the messenger loosens cutting element and can continue work behind the master control trigger, need not to continuously press the master control trigger, thereby reduces the fatigue of customer's hand, promotes the grass mower that has the operation auto-lock that the customer used experience.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it.

Further, throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic and that elements and components are not necessarily drawn to scale.

In the drawings:

FIG. 1 is an overall schematic view according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of the embodiment shown in FIG. 1 when the safety button is in a first position;

FIG. 3 is a cross-sectional view of the embodiment shown in FIG. 1 when the safety button is in a second position;

FIG. 4 is a cross-sectional view of the embodiment shown in FIG. 1 when the safety button is in the locked position;

FIG. 5 is a schematic diagram of the safety button of the embodiment shown in FIG. 1;

fig. 6 is a schematic structural diagram of the main control trigger in the embodiment shown in fig. 1.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.

It should be noted that, for the convenience of description, only the parts relevant to the present application are shown in the drawings. The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.

It is noted that references to "a" or "an" in this disclosure are intended to be illustrative rather than limiting, and that those skilled in the art will appreciate that references to "one or more" are intended to be exemplary unless the context clearly indicates otherwise.

The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 6, a grass trimmer 100 with self-locking function of this embodiment includes: cutting element 110, drive head 120, handle device 130; the cutting element 110 is made of nylon material, preferably, the cutting element 110 is a grass cutting line or a cutting blade for realizing grass cutting function; a motor is arranged in the driving machine head 120, and the motor is connected with the cutting element 110 and is used for driving the cutting element 110 to rotate; the handle device 130 is used for a user to hold to operate the lawn mower.

The aforementioned handle device 130 includes: a handle housing 131, a contact switch 132, a master trigger 133, a safety button 134, and a reset element 135; a power source for supplying power to the motor is provided on the handle assembly 130, and a contact switch 132 is commercially available for connecting the power source to the motor, such that when the contact switch 132 is triggered, the power source is able to supply power to the motor to rotate the cutting element 110; the contact switch 132 is fixedly installed inside the handle housing 131; a rotating rod 133a is arranged at one end of the main control trigger 133, which is far away from the driving handpiece 120, the rotating rod 133a is rotatably connected in the handle shell 131, and the rotating axis of the rotating rod 133a coincides with a pivot axis; in this manner, the main control trigger 133 is movably connected to the handle housing 131 such that the main control trigger has at least an activation position for activating the contact switch 132 and a release position for releasing the contact switch 132; the safety button 134 is slidably coupled to the handle housing 131 in a pressing direction such that the safety button 134 has a first position to stop the main control trigger 133, a second position to clear the main control trigger 133, and a locked position to lock the main control trigger in the activated position.

Specifically, as shown in fig. 2, when the safety button 134 is located at the first position, the safety button 134 prevents the main control trigger 133 from rotating around the rotating rod 133a and moving from the release position to the trigger position, so as to prevent the main control trigger 133 from being touched by mistake and the cutting element 110 from rotating, thereby ensuring the safety of the grass trimmer during use; when the safety button 134 slides relative to the handle housing 131 and moves from the first position to the second position, the safety button 134 does not obstruct the movement of the main control trigger 133, and at this time, the main control trigger 133 can be pressed to rotate around the rotating rod 133a to move from the release position to the trigger position, and when the main control trigger 133 is in the trigger position, the contact switch 132 is triggered to connect the power supply with the motor, and the motor can drive the cutting element 110 to rotate, so that the grass mowing function is realized; when the main control trigger 133 is in the triggering position, the safety button 134 can continue to move to the locking position to limit the movement of the main control trigger 133, so that the main control trigger 133 can be kept in the triggering position after the main control trigger 133 is pressed; in the related art, the user needs to continuously press the trigger to continuously rotate the cutting element 110, and as the setting of this embodiment, when the main control trigger 133 is in the trigger position and the safety button 134 is in the lock position, the main control trigger 133 does not need to be pressed, and the cutting element 110 can continuously work, so that the labor intensity of the user is reduced, the fatigue of the hand of the user is reduced, and the use experience of the user is improved.

Further, the handle housing 131 is provided with a trigger opening 131a such that the main trigger 133 is at least partially exposed on a first side of the handle housing 131.

Specifically, as shown in fig. 4, the portion of the handle housing 131 exposed at the first side of the handle housing 131 is located between the driving head 120 and the handle housing 131, so that when the user holds the handle device 130 and faces the driving head 120, the user's hand can surround the handle housing 131 and at least one finger directly contacts the main trigger 133, thereby facilitating the user to press the main trigger 133 to control the operation of the cutting element 110.

Further, the handle housing 131 is provided with a button opening 131b to expose the safety button 134 at least partially at a second side of the handle housing 131 different from the first side.

Specifically, as shown in fig. 4, the central axis of the button opening 131b is parallel to the pressing direction, and the safety button 134 is partially inserted into the button opening 131 b; when the safety button 134 slides relative to the handle housing 131, a portion of the safety button 134 is always located at a side of the button opening 131b away from the interior of the handle housing 131, so that the safety button 134 protrudes from the surface of the handle housing 131, which is convenient for a user to position the safety button 134 when holding the handle device 130, and further, the user can control the movement of the safety button 134.

Further, the primary trigger 133 is at least partially exposed on a first side of the handle housing 131 and the safety button 134 is at least partially exposed on a second side of the handle housing 131 on a non-opposite side; the arrangement is such that when an operator holds the handle device 130, the fingers of the operator can conveniently contact the safety button 134 and the main control trigger 133 at the same time, thereby further facilitating the control of the movement of the two.

Further, the safety button 134 includes: a pressing portion 134a and a function portion 134 b; the pressing portion 134a is formed with a pressing contact surface 134c for the user to press; the functional portion 134b is formed with an escape slot 134d and a latch hook structure 134 e; the pressing part 134a is arranged on one side of the function part 134b in the pressing direction; the avoiding groove 134d and the latch hook structure 134e are provided at two different positions of the functional portion 134b in the pressing direction.

Specifically, as shown in fig. 5, the pressing portion 134a passes through the button opening 131b, and the pressing contact surface 134c is disposed at an end of the portion of the pressing portion 134a exposed at the second side of the handle housing 131, so that the user can press the pressing portion 134a to slide along the pressing direction; the functional portion 134b is located inside the handle housing 131 and integrally formed with the pressing portion 134a, such that the functional portion 134b moves synchronously when the pressing portion 134a slides along the pressing direction, and the avoiding slot 134d and the latch hook structure 134e move synchronously with the pressing portion 134a and complete the matching with the main control trigger 133.

Further, at least a portion of the latch hook structure 134e forms a notch 134f of the escape slot 134d, the notch 134f is disposed on a side of the escape slot 134d adjacent to the main control trigger 133, and the main control trigger 133 can partially move into the escape slot 134d to facilitate movement of the main control trigger 133 along the release position to the triggering position to initiate rotation of the cutting element 110.

Further, a portion of the latch hook structure 134e constituting the notch 134f of the avoidance groove 134d is configured to have at least one inclined plane 134i obliquely intersecting with the pressing direction; the latch hook structure 134e includes: a first stop surface 134g and a first locking surface 134 h; the first stopping surface 134g and the first locking surface 134h are disposed on two opposite sides of the latch hook structure 134e and are both parallel to the pressing direction; a ramp surface 134i is disposed between the stop surface and the locking surface.

Further, an abutting portion 131c is provided inside the handle case 131; the safety button 134 also includes: a groove portion 134 j; the groove portion 134j is provided with an element groove 134 k; the return member 135 is configured as a coil spring and is disposed in the member groove 134 k; one end of the reset element 135 abuts against the groove portion 134j, and the other end abuts against the abutting portion 131 c; the groove wall of the element groove 134k is provided with an abutting notch to make the abutting portion 131c at least partially embedded into the element groove 134k, so that when the user presses the pressing contact surface 134c to push the safety button 134 to move from the first position to the second position along the sliding direction, the coil spring is compressed and deformed by the pressing of the groove portion 134j and the abutting portion 131c, so that the safety button 134 can be automatically reset after the user releases the safety button 134.

Further, the main control trigger 133 includes: a force receiving portion 133b and a stopper portion 133 c; the force receiving portion 133b is at least partially exposed from the handle case 131; both side surfaces of the force receiving portion 133b are in contact with wall surfaces of the handle case 131 forming the trigger opening 131a, respectively; and the edge region of the force-bearing part 133b inside the handle housing 131 is bent and extended to form a bent structure 133d, the bent structure 133d is configured such that the main control trigger 133 cannot be completely moved out of the handle housing 131 from the trigger opening 131a, so as to assemble the main control trigger 133 onto the handle housing 131; in addition, the accommodating grooves 133e are formed in the parts, located in the handle shell 131, on the two sides of the stress part 133b, the user presses the stress part 133b to move the stress part to the triggering position, the safety button 134 partially enters the accommodating grooves 133e, and the influence on the normal movement of the main control trigger 133 and the safety button 134 is avoided; thus, the accommodating groove 133e can control the size of the handle housing 131 to facilitate the user to hold the handle device 130.

Further, a limit portion 133c is formed at a side of the main control trigger 133 close to the function portion 134 b; the limiting part 133c is arranged at one side of the force-bearing part 133b extending into the handle shell 131; the limiting part 133c comprises a limiting structure 133f which can be matched with the locking hook structure 134 e; the limit structure 133f includes: a second stop surface 133g and a second locking surface 133 h; the second stopping surface 133g and the second locking surface 133h are arranged on two opposite sides of the limiting structure 133f and are arranged in parallel; the first stop surface 134g contacts the second stop surface 133g when the safety button 134 is in the first position.

Specifically, as shown in fig. 2 to 4, the first stopping surface 134g and the second stopping surface 133g are both flat surfaces, and when the two surfaces are in contact with each other, the second stopping surface 133g blocks the movement of the first stopping surface 134g, so that the movement of the main control trigger 133 is limited, the main control trigger 133 is kept at a release position, and the cutting element 110 is prevented from rotating due to mistakenly touching the main control trigger 133; when the safety button 134 is pressed to slide from the first position to the second position, the first stopping surface 134g and the second stopping surface 133g are staggered in the rotation direction of the main control trigger 133 relative to the handle housing 131, and at this time, the force receiving portion 133b is pressed, so that the main control trigger 133 can rotate relative to the handle housing 131, and in the process, the limiting portion 133c partially rotates to the avoiding groove 134d along the notch 134f under the guiding action of the inclined plane 134i, the main control trigger 133 rotates from the releasing position to the triggering position, the motor is powered on, and the rotation of the cutting element 110 is realized; after the main control trigger 133 moves to the trigger position, if the user releases the pressing of the pressing contact surface 134c, the reset element 135 pushes the safety button 134 to move from the second position to the locking position, at this time, the first locking surface 134h contacts with the second locking surface 133h, the second locking surface 133h obstructs the movement of the first locking surface 134h, the safety button 134 stays at the locking position, and the movement of the main control trigger 133 is limited; at this time, the first position-limiting portion 133c partially stays in the avoiding groove 134d, so that the main control trigger 133 is kept at the triggering position after the pressing of the main control trigger 133 is released, and the cutting element 110 continuously works; the main control trigger 133 is provided with an ejection spring 133 i; the ejection spring 133i is located in the handle housing 131, and two ends of the ejection spring are respectively contacted with the main control trigger 133 and the inner wall of the handle housing 131; when the main control trigger 133 is at the trigger position, the ejecting spring 133i is in a compressed state, and after the safety button 134 is moved to the second position by pressing the pressing contact surface 134c, if the main control trigger 133 is not pressed at this time, the main control trigger 133 is moved to the release position by the elastic force of the ejecting spring 133i, so that the power supply of the power supply to the motor is cut off; thereafter releasing the press contact surface 134c allows the safety button 134 to move to the first position under the spring force of the reset element 135 to again lock the primary trigger 133 in the release position.

Further, the main control trigger 133 further includes: a switch post 133 j; when the main control trigger 133 is at the triggering position, the switch post 133j contacts the contact switch 132 to trigger the contact switch 132, and the motor is powered on and drives the cutting element 110 to rotate; when the main control trigger 133 is moved to the release position, the switch post 133j is not in contact with the contact switch 132, and the contact switch 132 is released to cut off power to the motor.

The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention in the embodiments of the present disclosure is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is made without departing from the inventive concept as defined above. For example, the above features and (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure are mutually replaced to form the technical solution.

Claims (10)

1. A lawnmower with operational self-locking, comprising:

a cutting element for performing a grass cutting function;

the driving machine head is used for driving the cutting element to rotate;

a handle device for holding by a user to operate the lawnmower;

the method is characterized in that:

the handle device includes:

the handle comprises a handle shell, a contact switch, a main control trigger, a safety button and a reset element;

wherein the contact switch is fixedly mounted within the handle housing, the master trigger being movably connected to the handle housing about a pivot axis such that the master trigger has at least an activated position for activating the contact switch and a released position for releasing the contact switch; the safety button and the handle shell form sliding connection along a pressing direction so that the safety button at least has a first position for stopping the main control trigger, a second position for avoiding the main control trigger and a locking position for locking the main control trigger at the triggering position.

2. A lawnmower with operational self-locking according to claim 1, characterized in that:

the handle housing is provided with a trigger opening to expose the main control trigger at least partially on a first side of the handle housing.

3. A lawnmower with operational self-locking according to claim 2, wherein:

the handle housing is provided with a button opening to expose the safety button at least partially on a second side of the handle housing different from the first side.

4. A lawnmower with operational self-locking according to claim 3, characterized in that:

the main control trigger is at least partially exposed on a first side of the handle housing and the safety button is at least partially exposed on a second side of the handle housing on a non-opposite side.

5. A lawnmower with operational self-locking according to claim 1, characterized in that:

the safety button includes:

the pressing part is provided with a pressing contact surface for a user to press;

the functional part is provided with an avoiding groove and a lock hook structure;

the pressing part is arranged on one side of the functional part in the pressing direction; the avoidance groove and the lock hook structure are arranged at two different positions of the functional part in the pressing direction.

6. A lawnmower with operational self-locking according to claim 5, characterized in that:

at least a portion of the latch hook structure forms a notch of the avoidance slot.

7. A lawnmower with operational self-locking according to claim 6, characterized in that:

the portion of the latch hook structure constituting the notch of the avoiding groove is configured to have at least one inclined plane obliquely intersecting with the pressing direction;

the latch hook structure includes: a first stop surface and a first locking surface;

the first stopping surface and the first locking surface are arranged on two opposite sides of the locking hook structure and are parallel to the pressing direction;

the inclined plane is disposed between the stop surface and the locking surface.

8. A lawnmower with operational self-locking according to claim 7, wherein:

the inner side of the handle shell is provided with a butting part;

the safety button further includes:

a groove portion provided with an element groove;

the return element is configured as a coil spring and is disposed in the element recess; one end of the reset element is propped against the groove part, and the other end of the reset element is propped against the abutting part; the groove wall of the element groove is provided with an abutting notch so that at least one part of the abutting part is embedded into the element groove.

9. A lawnmower with operational self-locking according to claim 7, characterized in that:

the master trigger includes:

the force bearing part is at least partially exposed out of the handle shell;

the limiting part is formed on one side, close to the functional part, of the main control trigger;

the limiting part is arranged on one side of the stress part extending into the handle shell;

the limiting part comprises a limiting structure which can be matched with the locking hook structure.

10. A lawnmower with operational self-locking according to claim 9, wherein:

the limit structure comprises: a second stop surface and a second locking surface;

the second stop surface and the second locking surface are arranged on two opposite sides of the limiting structure;

the first stop surface contacts the second stop surface when the safety button is in the first position.

Images