Patent Application
20240081192
The present disclosure relates to garden electric tools, and in particular to a hedge trimmer.
The hedge trimmer, as a commonly used garden electric tool, can be used for trimming shrubs and hedges, with the advantages of convenient operation, high cutting efficiency and the like. The main components of the hedge trimmer include a blade assembly, a front machine body and a rear machine body. Due to the fixed structure of the front machine body and the rear machine body of a traditional hedge trimmer, the usage state of the traditional hedge trimmer cannot be changed. It is necessary for operators to frequently adjust the posture of the human body or arms to rotate the traditional hedge trimmer to change the usage state in response to trimming the work surfaces at different angles, such as oblique cutting or vertical cutting. Thus, the operation is inconvenient and the traditional hedge trimmer can only adapt to simple horizontal surface cutting, and the trimming requirement is difficult to meet.
With the development of technology, some companies have developed a machine type with the rear machine body capable of rotating, but this machine type still has the defects that the rear machine body can still be operated to rotate in the process of high-speed reciprocating trimming of a blade of the hedge trimmer, which is prone to accidents and personal injury to the operator.
A first aspect of the present disclosure provides a hedge trimmer including a front machine body, a blade assembly connected to an axial front end of the front machine body, and a rear machine body connected to an axial rear end of the front machine body. The front machine body includes a motor configured to drive the blade assembly to reciprocate, the rear machine body includes a power supply circuit electrically connected with the motor and a power supply connected to the rear machine body, and the power supply is configured to supply power to the motor through the power supply circuit. The rear machine body is configured to rotate relative to the front machine body, the rear machine body includes a rotary unlocking trigger and a microswitch arranged on a side of the rotary unlocking trigger, and the microswitch is a normally closed switch and is electrically connected to the power supply circuit. The rotary unlocking trigger is configured to be at a first position and a second position relative to the front machine body. In response to the rotary unlocking trigger is at the first position, the rotary unlocking trigger catches the front machine body and is away from the microswitch, at this time, the rear machine body is fixed relative to the front machine body, and the power supply circuit is conducted. In response to the rotary unlocking trigger is at the second position, the rotary unlocking trigger disengages from the front machine body and triggers the microswitch, the rear machine body rotates relative to the front machine body, and the power supply circuit is disconnected.
In some embodiments, the front machine body has a cylindrical rotating shaft part on a rear end of the front machine body, the rotating shaft part defines a plurality of lock holes distributed on an outer peripheral surface of the rotating shaft part, the rotary unlocking trigger is provided with a lock pin located at the front end of the rotary unlocking trigger and matched with one or more lock holes, and in response to the rotary unlocking trigger is at the first position, the lock pin is inserted into the one or more lock holes, and the rear machine body is fixed relative to the front machine body; in response to the rotary unlocking trigger is at the second position, the lock pin is separated from the one or more lock holes, and the rear machine body rotates relatively to the front machine body.
In some embodiments, the rotary unlocking trigger and the rear machine body form a sliding connection or a rotating connection, and the rear end of the rotary unlocking trigger is exposed out of the rear machine body and configured to be operated by an operator.
In some embodiments, the rotary unlocking trigger is provided with a hook-shaped part that is located at the rear end and is exposed out of the rear machine body, and a free end of the hook-shaped part is bent towards a lower side of the rear machine body.
In some embodiments, the rear machine body is provided with an elastic piece located between the lock pin and an inner wall of the rear machine body, and the elastic piece and the microswitch are located on the same side of the rotary unlocking trigger.
In some embodiments, the one or more lock holes are arranged at the same intervals along a circumferential direction of the rotating shaft part.
In some embodiments, the plurality of locking holes forms a plurality of locations with rotatable angles of the front machine body relative to the rear machine body, and an angle difference of adjacent locations is 45 degrees.
In some embodiments, the front machine body is provided with a first handle extending in a transverse direction that is perpendicular to an axial direction of the front machine body, the first handle includes a holding part arranged transversely and connecting parts that are respectively connected with the front machine body from two transverse ends of the holding part, an elastic component is arranged between the connecting parts and the front machine body, and the elastic component is rubber or a spring.
In some embodiments, the rear machine body is provided with a second handle extending along an axial direction of the rear machine body and a starting trigger configured to control starting the motor, and the starting trigger and the rotary unlocking trigger are respectively located on an upper side and a lower side of an inner ring of the second handle.
In some embodiments, the power supply includes a battery pack, the rear machine body is provided with the battery pack, a straight line that passes through a gravity center of the blade assembly and is parallel to an axial direction of the rear machine body is taken as a halving line, and the gravity center of the hedge trimmer installed with the battery pack is located on a side of the halving line.
A second aspect of the present disclosure provides a hedge trimmer including a front machine body, a blade assembly connected to an axial front end of the front machine body, a rear machine body connected to an axial rear end of the front machine body, and a battery pack. The front machine body includes a motor configured to drive the blade assembly to reciprocate, the rear machine body includes a power supply circuit electrically connected with the motor, a battery pack is connected to the rear machine body, and the battery pack is configured to supply power to the motor through the power supply circuit; the rear machine body is configured to rotate relative to the front machine body, the rear machine body includes a rotary unlocking trigger and a microswitch arranged on a side of the rotary unlocking trigger, and the microswitch is a normally closed switch and is electrically connected to the power supply circuit; the rotary unlocking trigger is configured to be at a first position and a second position relative to the front machine body, in response to the rotary unlocking trigger is at the first position, the rotary unlocking trigger catches the front machine body and is away from the microswitch, at this time, the rear machine body is fixed relative to the front machine body, and the power supply circuit is conducted; in response to the rotary unlocking trigger is at the second position, the rotary unlocking trigger disengages from the front machine body and triggers the microswitch, the rear machine body rotates relative to the front machine body, and the power supply circuit is disconnected.
A third aspect of the present disclosure provides a hedge trimmer. The hedge trimmer includes a front machine body, a blade assembly connected to an axial front end of the front machine body, a rear machine body connected to an axial rear end of the front machine body; and a starting trigger. The front machine body includes a motor configured to drive the blade assembly to reciprocate and a plurality of lock holes, the rear machine body includes a power supply circuit electrically connected to the motor and a power supply connected to the rear machine body, and the power supply is configured to supply power to the motor through the power supply circuit. The rear machine body defines a rotary unlocking trigger that is configured to unlock rotating states of the front machine body and the rear machine body, a microswitch and an elastic piece. The rotary unlocking trigger includes a wrench part disposed below the starting trigger, a lock part and a rotating shaft between the wrench part and the lock part. A side of the lock part defines a lock pin matched with the one or more lock holes and the other side of the lock part that abuts against the elastic piece. In response to the lock pin engages with one of the plurality of lock holes, the microswitch is closed and the power supply circuit is conducted. In response to the lock pin disengages from one of the plurality of lock holes, the rear machine body is configured to rotate relative to the front machine body, the other side of the lock part compresses the elastic piece, so that the elastic piece deforms, the microswitch is disconnected, and the power supply circuit is disconnected.
In some embodiments, the microswitch is between the rotary unlocking trigger and the rotating shaft.
The embodiments of the present disclosure will be further explained in detail in conjunction with the accompanying drawings.
The technical solutions of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, but not all embodiments. Based on the embodiments of the present disclosure, other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.
In the description of the present disclosure, it is to be noted that unless otherwise expressly specified and limited, the terms “mounted” and “connected” are to be interpreted broadly. For example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanical connection or electric connection; it can be directly connected, or indirectly connected through an intermediate medium, or can be a connection between the interior of two elements. Those skilled in the art can understand the specific meanings of the above terms in the present disclosure.
Aiming at the defects in the existing technology, the present disclosure aims to provide a hedge trimmer that improves safety and is easy to operate.
A hedge trimmer provided by an embodiment of the present disclosure is a horticultural cutting tool for outdoor trimming of vegetation such as shrubs, hedges, or the like. Referring to
Aiming at different scenes such as the horizontal surface and the side surface of the vegetation, an operator needs to switch between a flat cutting operation and a side cutting operation. In response to the front machine body 10 rotates relative to the rear machine body 20, the orientation of the blade assembly 15 can be changed to horizontal, oblique, or vertical. Referring to
A plurality of locations can be set based on the rotation angle of the front machine body 10 relative to the rear machine body 20, and the one or more lock holes 1021 are arranged at the same interval along the circumferential direction of the rotating shaft part 102. Each lock hole 1021 corresponds to a location of a rotatable angle of the front machine body 10 relative to the rear machine body 20, and the angle difference value of the adjacent locations is 45 degrees. For example, four locations may be arranged, the front machine body 10 rotates counterclockwise by 45 degrees, 90 degrees, or clockwise by 45 degrees, 90 degrees relative to the rear machine body 20. The 90 degrees is used for trimming horizontal and vertical lines, and the 45 degrees is used for oblique angles and smooth transition, which can meet the requirements of general rough trimming and fine trimming.
In an embodiment of the present disclosure, the second handle 201 is a longitudinal ring-shaped handle extending along the axial direction of the machine body. A starting trigger 16 used for starting the motor and the rotary unlocking trigger 11 used for unlocking the rotating states of the front machine body 10 and the rear machine body 20 are respectively arranged on the upper side and the lower side of an inner ring of the second handle 201, thereby rationally using space and achieving a compact structure. The inner ring of the second handle 201 forms a space A, the rotary unlocking trigger 11 and the starting trigger 16 are located in the space A, and the rotary unlocking trigger 11 is located below the starting trigger 16. Further, the rear end of the rotary unlocking trigger 11, which is exposed out of the rear machine body 20, has a hook-shape part. The free end of the hook-shaped part is bent towards the lower side of the rear machine body 20. In response to the operator holds the second handle 201, the rotary unlocking trigger 11 can be pulled upwards by a forefinger and a middle finger, so that the operation is convenient and ergonomic. An elastic piece 13 is arranged between the lock pin 111 and the rear machine body 20, so that the rotary unlocking trigger 11 can be reset to the initial position in response to the rotary unlocking trigger 11 is not used by the operator.
During operating the blade assembly 15 of the hedge trimmer in the existing technology, the rear machine body 20 can still operate and rotate, which is prone to accidents and personal injury to the operator. Different from the existing technology, in an embodiment of the present disclosure, the hedge trimmer further includes a microswitch 12 arranged on a side of the rotary unlocking trigger 11. The microswitch 12 is a normally closed switch and is electrically connected to the power supply circuit of the motor. In response to the rotary unlocking trigger 11 is at the initial first position, the front machine body 10 is fixed relative to the rear machine body 20, and the rotary unlocking trigger 11 is away from the microswitch 12, so that the power supply circuit of the motor is conducted, and the motor can be started after the starting trigger 16 is pressed. In response to the rotary unlocking trigger 11 is pushed by the operator, so that the rotary unlocking trigger 11 is at the second position after sliding a preset distance or rotating the preset angle relative to the first position, the front machine body 10 can rotate relative to the rear machine body 20, at this time, the unlocking trigger 11 triggers the microswitch 12, and the power supply circuit is disconnected. Even if the starting trigger 16 is pressed by the operator, the motor still cannot be started because the power supply circuit is in a disconnected state, to ensure safe use.
Referring to
Besides, the rear machine body 20 defines the rotary unlocking trigger 11 that is configured to unlock rotating states of the front machine body 10 and the rear machine body 20, the microswitch 12 and the elastic piece 13. The rotary unlocking trigger 11 includes a wrench part 18 disposed below the starting trigger 16, a lock part 19 and the rotating shaft 21 between the wrench part 18 and the lock part 19. A side of the lock part 19 defines the lock pin 111 matched with the one or more lock holes 1021 and the other side of the lock part 19 that abuts against the elastic piece 13. In response to the lock pin 111 engages with one of the plurality of lock holes 13, the microswitch 12 is closed and the power supply circuit is conducted. In response to the lock pin 111 disengages from one of the plurality of lock holes 1021, the rear machine body 20 is configured to rotate relative to the front machine body 10, the other side of the lock part 19 compresses the elastic piece 13, so that the elastic piece 13 deforms. And accordingly, the microswitch 12 is disconnected, and the power supply circuit is disconnected. The microswitch 12 is between the rotary unlocking trigger 11 and the rotating shaft 21.
In an embodiment of the present disclosure, the hedge trimmer includes the first handle 101 disposed on the front machine body 10 and the second handle 201 disposed on the rear machine body 20, for the operator to hold with both hands. To prevent personal injury caused by the operator's accidental start of the hedge trimmer, the first handle 101 and the second handle 201 are both provided with the starting trigger 16. Only in response to the rotary unlocking trigger 11 is in a non-unlocking state, and the starting triggers 16 on the two handles are simultaneously pressed by the operator, the hedge trimmer can be started, so as to improve safety. The first handle 101 is a ring-shaped handle extending in a transverse direction that is perpendicular to the axial direction of the front machine body 10. The first handle 101 includes a holding part and two connecting parts that are respectively connected to the left side and right side of the front machine body 10 from the two transverse ends of the holding part. A U-shaped starting trigger 16 extends along the inner side outline of the holding part, and the U-shaped starting trigger 16 can be triggered by pressing the first handle 101 in any direction by the operator.
In response to the hedge trimmer is used, the generated vibration is relatively large, and the vibration can be directly transmitted to the operator holding the handle through the handle. In an embodiment of the present disclosure, an elastic member is arranged between the connecting parts of the first handle 101 and the front machine body 10, and the elastic member can be a rubber or a spring, so that part of the vibration is absorbed by the elastic member to improve the user experience.
The power supply is connected to the rear machine body 20 and supplies power to the motor through the power supply circuit. The power supply can be connected with a mains supply socket, a battery pack and other external power supplies through power lines to provide electric energy. Alternatively, the battery pack is directly inserted on the machine body to provide electric energy, and the battery pack can be independently disassembled and charged to store electric energy. In an embodiment of the present disclosure, taking the battery pack 14 directly inserted into the machine body as an example for explanation, the battery pack 14 is inserted horizontally from the side or back below the second handle 201 of the rear machine body 20. The weight of the battery pack 14 is balanced with the weight of the blade assembly 15 extending forward, thereby preventing the gravity center of the hedge trimmer from deviating from one of the front direction and rear direction.
With the development of technology, the capacity of battery pack continues to increase, and the weight of battery pack accounts for a large proportion of the overall weight of electric tool. Therefore, the position of the gravity center of electric tool will change due to the influence of the battery pack. Referring to
Compared with the related art, the effects of the present disclosure are as follows. The front machine body can rotate relative to the rear machine body, which is convenient to meet the use requirements of the operator. The rotary unlocking trigger not only controls the rotation of the front machine body and the rear machine body, but also controls the on-off switching of the power supply circuit. During the unlocking state of the rotary unlocking trigger, even if the starting trigger is triggered, the motor cannot be started due to the disconnection of the power supply circuit, ensuring safe use. The rotary unlocking trigger is arranged into a hook shape, so that the operation is convenient, the space is reasonably utilized, and the structure is compact. The gravity center of the whole hedge trimmer is shifted, the posture of using the hedge trimmer is more stable, which is favorable to power distribution and gravity center control of the operator, less fatigue.
In the description of the present specification, the reference terms “an embodiment”, “some embodiments”, “exemplary embodiment”, “example”, “specific example”, or “some examples” or the like means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present disclosure. The foregoing exemplary expressions of terms do not necessarily refer to the same embodiment or example. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present disclosure have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present disclosure. The scope of the present disclosure is limited by the claims and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202111441890.6 | Nov 2021 | CN | national |
The present application is a continuation of International Patent Application No. PCT/CN2022/133037 filed on Nov. 19, 2022, which claims priority to Chinese Patent Application No. 202111441890.6, filed on Nov. 30, 2021, the contents of all of which are hereby incorporated by reference.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2022/133037 | Nov 2022 | US |
| Child | 18510704 | US |
