Electric pruning shears

Abstract

The application relates to an electric pruning shears, comprising: a housing; a motor, at least partially housed in the housing; a transmission mechanism, connected to the motor and receiving power of the motor; a support, at least partially housed in the housing; a fixed blade, fixed to the support; a movable blade, pivoted on the support in response to the power of the motor; a trigger, pivoted inside the housing; a controller, at least partially housed in the housing and used for controlling the motor; a guide rail; a guide block, matched with the guide rail; one of the guide rail and the guide block is located at one end of the trigger, and the other is connected to the housing, so that the probability of accidental triggering of the electric pruning shears is reduced.

Description

Technical Field

[0001] This application relates to the field of garden tools technology, and in particular to electric pruning shears. Background Technology

[0002] Electric pruning shears are garden tools that use an electric motor to rotate the blades to prune branches. Compared with traditional manual shears, they can significantly improve pruning efficiency and reduce labor intensity.

[0003] In related technologies, Japanese Patent Publication No. JP1999128561A discloses an electric pruning shear. The technical solution involves transmitting the rotational power of an electric motor to a movable blade through gear engagement, eliminating the traditional engagement of a lead screw and nut, and changing the positions of the trigger and the movable blade. Through sensor detection, the rotational support shaft of the trigger can be fixed, and the movable blade can be stopped in the intermediate position.

[0004] However, the triggers of current electric pruning shears require rotation, resulting in a gap between the pivot points. This can easily lead to inaccurate detection due to trigger wobbling, causing misjudgments by the controller. Therefore, improvements are needed. Utility Model Content

[0005] Therefore, it is necessary to provide an electric pruning shear to address the problem of misjudgment that electric shears are prone to.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows: In one embodiment, an electric pruning shear is provided, comprising: shell; The motor is at least partially housed within the housing; A transmission mechanism is connected to the motor and receives power from the motor; The support is at least partially housed within the housing; The fixed blade is fixed on the bracket; The moving blade responds to the power of the motor and pivots on the support; The trigger pivots inside the housing; A controller, at least partially housed within the housing, is used to control the motor; guide; The guide block mates with the guide rail; One of the guide rail and the guide block is located at one end of the trigger, and the other is connected to the housing.

[0007] In some or other preferred embodiments, the bracket is provided with a first protrusion and a second protrusion, the trigger is pivoted on the first protrusion, and the guide rail or guide block is located on the second protrusion.

[0008] In some or other preferred embodiments, the guide rail is provided with a guide portion, the guide block is provided with a guide portion, the guide portion and the guide portion cooperate, the guide rail is arc-shaped, and the arc of the guide rail cooperates with the arc of the trigger pivot.

[0009] In some or other preferred embodiments, a magnet is provided inside the trigger or the housing, and a Hall sensor is provided inside the housing, the Hall sensor being signal-connected to the controller.

[0010] In some or other preferred embodiments, a resistor is provided inside the trigger or the housing, and a sliding contact is provided inside the housing. The resistor is connected to an external circuit, and the sliding contact is connected to the external circuit. The external circuit is provided with a sampling resistor, and the high-voltage end of the sampling resistor is connected to the controller.

[0011] In some or other preferred embodiments, a Hall plate is also included, the resistor is disposed on the Hall plate, the peripheral circuit is disposed on the Hall plate, and the sliding contact is a conductive block.

[0012] In some or other preferred embodiments, the Hall plate is located on the trigger side, the second protrusion is located on the trigger side away from the Hall plate, the guide rail is located on the second protrusion, one side of the guide block abuts against the resistance on the Hall plate, and the other side cooperates with the guide rail.

[0013] In some or other preferred embodiments, the guide block is a conductive ball, and the trigger is provided with a conductive sleeve on the periphery of the guide block, the conductive sleeve being electrically connected to the Hall plate.

[0014] In some or other preferred embodiments, the Hall plate is provided with two or more Hall sensors, which are signal-connected to the controller; the moving blade is provided with a magnetic element, and the controller is configured to control the position of the moving blade according to the position of the trigger.

[0015] In some or other preferred embodiments, the guide rail has an isolation pad on its surface facing the guide block.

[0016] In this embodiment, by adding a guide rail and a guide block to the electric pruning shears, and by having the pivot axis of the trigger and the guide rail jointly define a plane, the trigger can be guided to move within the defined plane, thereby reducing the probability of trigger wobbling and improving the accuracy of trigger control. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of an electric pruning shears according to an embodiment of this application; Figure 2 This is an exploded view of an electric pruning shears structure in one embodiment of this application.

[0018] Figure 3 This is a circuit diagram of a peripheral circuit in one embodiment of this application; Figure 4 This is an exploded view of an electric pruning shears structure in another embodiment of this application.

[0019] Figure 5 This is an exploded view of another embodiment of the electric pruning shears structure from another perspective.

[0020] Figure Descriptions: 1. Housing; 11. Motor; 12. Transmission Mechanism; 13. Bracket; 131. First Protrusion; 132. Second Protrusion; 14. Fixed Blade; 15. Moving Blade; 16. Trigger; 17. Controller; 18. Hall Plate; 2. Guide Rail; 21. Guide Part; 22. Isolation Pad; 3. Guide Block; 31. Guide Part; 32. Conductive Sleeve; 4. Hall Sensor; 41. Magnet; 5. Peripheral Circuitry; Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] See Figure 1 and Figure 2 Figure 1 shows a schematic diagram of the internal structure of an electric pruning shears according to an embodiment of this application, and Figure 2 shows an exploded schematic diagram of the structure of the electric pruning shears according to an embodiment of this application. The electric pruning shears provided in an embodiment of this application include a housing 1, a motor 11, a transmission mechanism 12, a support 13, a fixed blade 14, a movable blade 15, a trigger 16, a controller 17, a guide rail 2, and a guide block 3. The motor 11 is at least partially housed in the housing 1. The transmission mechanism 12 can be connected to the motor 11 and receive power from the motor 11. The support 13 is at least partially housed in the housing 1. The fixed blade 14 can be fixed to the support 13. The movable blade 15 can respond to the power of the motor 11 and pivot on the support 13. The movable blade 15 rotates relative to the fixed blade 14 to cut branches between them.

[0028] In some or other preferred embodiments, the bracket 13 may be provided with a first protrusion 131 and a second protrusion 132. The first protrusion 131 and the second protrusion 132 may be integrally formed on the bracket 13, or they may be connected to the bracket 13 by other connection methods. The trigger 16 may pivot on the first protrusion 131, and the guide rail 2 or guide block 3 may be located on the second protrusion 132, thereby increasing the range of motion of the trigger 16.

[0029] The trigger 16 can pivot inside the housing 1; the controller 17 is at least partially housed in the housing 1 and is used to control the motor 11; since the moving blade 15 needs to close and open with the fixed blade 14, the controller 17 can control the forward and reverse rotation of the motor 11. The guide rail 2 and the guide block 3 cooperate with each other, one of which is located at one end of the trigger 16 and the other is connected to the housing 1. Since the trigger 16 pivots inside the housing 1, the guide rail 2 and the guide block 3 can restrict and guide the movement of the trigger 16, reducing the probability of accidental triggering due to the wobbling of the trigger 16.

[0030] In some or other preferred embodiments, the guide rail 2 may be provided with a guide portion 21, which may be formed on the guide rail 2. The guide portion 21 may be arc-shaped or inclined. In this embodiment, it is composed of two arcs with a semi-circular cross-section. The guide block 3 may be provided with a guide portion 31, which may be inclined or arc-shaped. The guide portion 21 and the guide portion 31 cooperate with each other. The guide rail 2 is arc-shaped, and the curvature of the guide rail 2 matches the curvature of the trigger 16 pivoting, thereby guiding the movement of the trigger 16.

[0031] Reference Figure 2 In some or other preferred embodiments, a magnet 41 may be provided inside the trigger 16 or the housing 1, and a Hall sensor 4 may be provided inside the housing 1. In this embodiment, a magnet 41 is installed on the trigger 16, and a Hall sensor 4 is installed inside the housing 1. The Hall sensor 4 is signal-connected to the controller 17. The controller 17 can obtain the distance between the magnet 41 and the Hall sensor 4 based on the Hall sensor 4, that is, the distance the trigger 16 rotates, so as to facilitate the control of the moving blade 15.

[0032] See Figure 2 and Figure 3Figure 3 shows a circuit diagram of the peripheral circuit in one embodiment of this application. In some or other preferred embodiments, a resistor R2 may be provided inside the trigger 16 or the housing 1, and a sliding contact may be provided inside the housing 1. In this embodiment of the application, the resistor R2 is installed inside the housing 1, the sliding contact is located on the trigger 16, the resistor R2 is connected to the peripheral circuit 5, the peripheral circuit 5 can supply power to the resistor R2, the peripheral circuit 5 may also include a sampling resistor R1, the sliding contact can slide relative to the resistor R2, based on the principle of resistance, the sliding of the sliding contact will cause the voltage across the sampling resistor R1 to change, the sliding contact is connected to the peripheral circuit 5 to perform voltage division, the high voltage end of the sampling resistor R1 is connected to the controller 17, the controller 17 can calculate the distance the trigger 16 moves based on the voltage of the sampling resistor R1.

[0033] See Figure 3 and Figure 4 Figure 4 shows an exploded view of the electric pruning shears structure in another embodiment of this application. In some or other preferred embodiments, the electric pruning shears further include a Hall plate 18, wherein the Hall plate 18 is a circuit board, a resistor R2 can be connected to the Hall plate 18, and an external circuit 5 can be connected to the Hall plate 18. The Hall plate 18 can have built-in circuitry to connect the circuitry to the external circuit 5. The sliding contact can be a guide block 3, which allows the guide block 3 to limit the trigger 16 while also providing a hardware basis for distance detection.

[0034] In some or other preferred embodiments, the Hall plate 18 may be located on one side of the trigger 16, the second protrusion 132 may be located on the side of the trigger 16 away from the Hall plate 18, the guide rail 2 may be located on the second protrusion 132, one side of the guide block 3 may abut against the resistor R2 on the Hall plate 18, and the other side may cooperate with the guide rail 2, thereby limiting the position of the guide block 3.

[0035] See Figure 4 and Figure 5 Figure 5 shows an exploded view of the electric pruning shear structure from another perspective in another embodiment of this application. In some or other preferred embodiments, the guide block 3 can be made of conductive metal, and the guide block 3 can be a conductive ball. The trigger 16 is located on the periphery of the guide block 3 and a conductive sleeve 32 can be installed thereon. The conductive sleeve 32 is in contact with the outer peripheral wall of the guide block 3, that is, the guide block 3 can draw power from the conductive block. The conductive sleeve 32 is electrically connected to the peripheral circuit 5 to supply power to the conductive ball, and the conductive sleeve 32 is electrically connected to the Hall plate 18 to obtain voltage from the Hall plate 18.

[0036] In some or other preferred embodiments, an isolation pad 22 may be attached to the surface of the guide rail 2 facing the guide block 3. The isolation pad 22 may be fixed to the surface of the guide rail 2 that contacts the guide block 3. The isolation pad 22 may be made of insulating material, such as hard rubber or powder coating, to insulate the guide rail 2.

[0037] In some or other preferred embodiments, two or more Hall sensors may be connected to the Hall plate 18, and the Hall sensors are signal-connected to the controller 17; a magnetic component may be installed on the moving blade 15, and the controller 17 can control the specific position of the moving blade 15 according to the position of the trigger 16 based on the magnetic field strength of the magnetic component detected by the Hall sensor 4. This control method is prior art and will not be described in detail here.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An electric pruning shear, characterized in that, include: shell; The motor is at least partially housed within the housing; A transmission mechanism is connected to the motor and receives power from the motor; The support is at least partially housed within the housing; The fixed blade is fixed on the bracket; The moving blade responds to the power of the motor and pivots on the support; The trigger pivots inside the housing; A controller, at least partially housed within the housing, is used to control the motor; guide; The guide block mates with the guide rail; One of the guide rail and the guide block is located at one end of the trigger, and the other is connected to the housing.

2. The electric pruning shears according to claim 1, characterized in that, The bracket is provided with a first protrusion and a second protrusion, the trigger pivots on the first protrusion, and the guide rail or guide block is located on the second protrusion.

3. The electric pruning shears according to claim 1, characterized in that, The guide rail is provided with a guide part, and the guide block is provided with a guide part. The guide part and the guide part cooperate with each other. The guide rail is arc-shaped, and the arc of the guide rail cooperates with the arc of the trigger pivot.

4. The electric pruning shears according to claim 1, characterized in that, A magnet is provided inside either the trigger or the housing, and a Hall sensor is provided inside the other. The Hall sensor is signal-connected to the controller.

5. The electric pruning shears according to claim 2, characterized in that, The trigger or the housing is equipped with a resistor R2 inside one and a sliding contact inside the other. The resistor R2 is connected to an external circuit, and the sliding contact is connected to the external circuit. The external circuit is equipped with a sampling resistor R1, and the high-voltage end of the sampling resistor R1 is connected to the controller.

6. The electric pruning shears according to claim 5, characterized in that, It also includes a Hall plate, the resistor R2 is disposed on the Hall plate, the peripheral circuit is disposed on the Hall plate, and the sliding contact is a conductive block.

7. The electric pruning shears according to claim 6, characterized in that, The Hall plate is located on one side of the trigger, the second protrusion is located on the side of the trigger away from the Hall plate, the guide rail is located on the second protrusion, one side of the guide block abuts against the resistor R2 on the Hall plate, and the other side cooperates with the guide rail.

8. The electric pruning shears according to claim 7, characterized in that, The guide block is a conductive ball, and a conductive sleeve is provided on the periphery of the trigger, which is electrically connected to the Hall plate.

9. The electric pruning shears according to claim 6, characterized in that, The Hall plate is provided with two or more Hall sensors, which are signal-connected to the controller; the moving blade is provided with a magnetic element, and the controller is configured to control the position of the moving blade according to the position of the trigger.

10. The electric pruning shears according to claim 1, characterized in that, An isolation pad is provided on the surface of the guide rail facing the guide block.

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