A hedge trimmer

Abstract

The utility model provides a kind of hedge trimmer, solve the problem of poor flexibility of prior art hedge trimmer.A kind of hedge trimmer, including working head, extension rod and handle, one end of extension rod is detachable on working head by connecting assembly, handle is rotatably connected on the other end of extension rod by angle adjusting assembly.Through setting detachable connecting assembly between working head and extension rod, the quick replacement of cutter head is realized, users can select different function working head according to job requirements, significantly improve the utilization rate and economy of single equipment.At the same time, by setting angle adjustable and lockable adjusting assembly between extension rod and handle, the operator can adjust and firmly lock the holding angle of handle according to the height, angle of work surface and own posture, greatly enhance the adaptability of tool to different garden pruning scene, improve work efficiency and quality.

Description

Technical Field

[0001] This utility model belongs to the technical field of garden maintenance tools, specifically relating to a hedge trimming device. Background Technology

[0002] Hedge trimmers are common tools in garden maintenance, used for shaping and maintaining hedges and shrubs. Currently, most hedge trimmers on the market use a fixed or simple threaded connection between the working head (blade) and the handle or extension rod. Firstly, this structure is functionally limited and lacks adaptability. Because the working head cannot be quickly disassembled and replaced, a single machine can typically only perform one type of trimming task. When users need to perform diverse tasks such as trimming hedges at different heights, with different vegetation types, or combining hedge trimming with top plane trimming, multiple specialized machines are often required, resulting in high purchase and storage costs and inconvenience. Secondly, angle adjustment is inconvenient, limiting operational flexibility. Many devices have a fixed working head angle, or adjustments can only be made in a limited and time-consuming manner by loosening bolts. When trimming bevels, curved surfaces, or complex shapes, operators find it difficult to adjust the blade angle in real-time and flexibly according to their posture and the trimming surface. This not only affects trimming efficiency and accuracy but also easily leads to operator fatigue and even safety hazards due to awkward posture. Utility Model Content

[0003] This invention provides a hedge trimming device, which aims to solve the problem of poor flexibility in existing hedge trimming devices.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A hedge trimming device includes a working head, an extension pole, and a handle. One end of the extension pole is detachably connected to the working head via a connecting assembly, and the handle is rotatably connected to the other end of the extension pole via an angle adjustment assembly.

[0005] In a preferred embodiment, the connecting assembly includes a slot disposed on the working head, and the connecting assembly further includes a socket disposed on the extension rod, the socket having a pin that mates with the slot; The working head is provided with a hook body to lock the socket to the working head, and the socket is provided with a hook body that cooperates with the hook body.

[0006] Based on the above solution, the connecting assembly achieves rapid alignment and radial positioning through the cooperation of the insert and slot, while the interlocking of the hook and the latch ensures a secure axial lock between the working head and the extension rod. This allows the working head to be safely, reliably, and quickly assembled and disassembled.

[0007] In a preferred embodiment, the hook body is provided with a pressing part, and a first elastic element is provided between the hook body and the working head to push the hook body to engage with the hook. When the hook body engages with the hook, the hook body locks the socket onto the working head via the hook. When the pressing part is operated to overcome the elastic force of the first elastic element and disengage the hook body from the hook, the hook body unlocks the hook, making the socket and the working head removable.

[0008] Based on the above solution, the first elastic element continuously pushes the hook body to automatically lock with the hook, ensuring a stable connection of the working head; by pressing the part to overcome the elastic force and separate the hook body from the hook, quick unlocking and disassembly can be achieved, realizing safe and reliable automatic locking and convenient one-button disassembly operation.

[0009] In a preferred embodiment, the hook body is provided with a first inclined surface, and the hook is provided with a second inclined surface that abuts against the first inclined surface. The hook pushes the pressing part to compress the first elastic element through the first and second inclined surfaces, so that the hook body passes over the hook and is hooked together with the hook.

[0010] Based on the above scheme, the cooperation of the first and second inclined surfaces allows the hook to automatically push the hook body to compress the first elastic element and slide in smoothly during installation, simply by pushing the socket towards the working head. After it is in place, the elastic element pushes the hook body to automatically reset and lock, realizing automatic installation with one push without manual operation.

[0011] In a preferred embodiment, the connecting assembly further includes a socket disposed on the extension rod. The extension rod is rotatably disposed on the socket via an adjustment assembly. The adjustment assembly includes a locked state and an unlocked state. When the adjustment assembly is in the locked state, the angle between the extension rod and the socket is locked. When the adjustment assembly is in the unlocked state, the angle between the extension rod and the socket is adjustable.

[0012] Based on the above solution, the adjustment component enables a rotatable connection between the extension rod and the socket, and by switching between locked and unlocked states, the user can flexibly adjust and reliably lock the working angle, thereby adapting to the pruning needs of different heights and directions.

[0013] In a preferred embodiment, the adjusting assembly includes a connector, a first gear ring, and a second gear ring. The extension rod is rotatably mounted on the socket via the connector. The first gear ring is mounted on the socket, and the second gear ring is mounted on the connector. The adjusting assembly further includes a sliding gear disposed between the first gear ring and the second gear ring. A second elastic element that pushes the sliding gear is disposed between the sliding gear and the connector. When the second elastic element pushes the sliding gear so that a part of the sliding gear enters the first gear ring and the other part of the sliding gear is located in the second gear ring, the sliding gear locks the angle of the connector relative to the socket; the sliding gear is provided with a force-applying part, and the pressing part provided on the sliding gear overcomes the force of the second elastic element to disengage the sliding gear from the first gear ring, so that the angle of the connector relative to the socket is adjustable.

[0014] Based on the above scheme, the adjustment component drives the sliding gear to simultaneously mesh with the first gear ring on the socket and the second gear ring on the connector through the second elastic element, so as to achieve rigid locking and reliable fixation of the angle; the sliding gear can be disengaged from the first gear ring by the pressing part to overcome the elastic force, so that the angle can be adjusted.

[0015] In a preferred embodiment, the cross-sectional shape of the plug is polygonal, and the plug and the socket are an integral structure.

[0016] Based on the above scheme, the polygonal cross-section of the insert can prevent relative rotation between the working head and the extension rod, ensuring stable power transmission.

[0017] In a preferred embodiment, the angle adjustment assembly includes a fixed base fixed to the extension rod, and the angle adjustment assembly further includes a pressing part disposed on the fixed base. The pressing part is slidably connected to the fixed base along the radial direction of the extension rod. The fixed base is provided with a rotating cavity. The pressing part is provided with an angle limiting block. The rotating cavity is provided with an angle limiting groove that cooperates with the angle limiting block. There are multiple angle limiting grooves, which are arranged circumferentially along the rotating cavity. The fixed base is also provided with a third elastic element that pushes the pressing part to engage with the angle limiting block and the angle limiting groove.

[0018] Based on the above solution, the third elastic element pushes the pressing part, causing the angle limiting block to automatically engage with any preset angle limiting groove in the rotating cavity of the fixed seat, thereby achieving fast and stable multi-position angle locking; pressing the pressing part will disengage the limiting block, thereby quickly switching positions and adjusting the angle of the working head.

[0019] In a preferred embodiment, the angle adjustment assembly further includes a rotating cavity disposed on the handle, the rotating cavity extending into the rotating cavity, a limiting ring disposed on the rotating cavity to prevent the handle from disengaging from the extension rod along the length direction of the extension rod, and a ring groove disposed on the fixing base to cooperate with the limiting ring.

[0020] Based on the above solution, the cooperation between the limiting ring and the ring groove achieves reliable axial constraint on the handle, preventing it from accidentally coming off the extension rod, while retaining the handle's ability to rotate freely around the axis, thus ensuring operational safety without affecting the angle adjustment function.

[0021] In a preferred embodiment, the working head includes a left half and a right half, which are connected by screws. The left half is provided with a left groove, and the right half is provided with a right groove. The left groove and the right groove cooperate to form a through hole through which the pressing part extends out of the working head.

[0022] Based on the above solution, the left and right halves are connected by screws to form a detachable working head, which facilitates assembly and maintenance.

[0023] The beneficial effects of this utility model are as follows: This invention provides a hedge trimming device. By incorporating a detachable connecting component between the working head and the extension rod, it enables quick head replacement. Users can select different functional working heads according to their operational needs, significantly improving the utilization rate and economy of a single unit. Simultaneously, an adjustable and lockable adjustment component between the extension rod and the handle allows the operator to adjust and securely lock the handle's grip angle based on the height and angle of the working surface and their own posture. This fundamentally solves the problems of awkward operation, fatigue, and difficulty in controlling trimming precision caused by the fixed angle of traditional tools, greatly enhancing the tool's adaptability to different garden trimming scenarios and improving operational efficiency and quality. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a first schematic diagram of the structure of a hedge trimming device according to this utility model.

[0026] Figure 2 This is a second schematic diagram of the structure of a hedge trimming device in this utility model.

[0027] Figure 3 This is a third schematic diagram of the structure of a hedge trimming device in this utility model.

[0028] Figure 4 This is the fourth schematic diagram of the structure of a hedge trimming device in this utility model.

[0029] Explanation of the labels in the diagram: 1-Working head; 2-Extension rod; 3-Handle; 4-Socket; 5-Pin; 6-First elastic element; 7-Hook; 8-Hook body; 9-Connector; 10-First gear ring; 11-Second gear ring; 12-Sliding gear; 14-Pressing part; 15-Handle; 16-Pressing part; 17-Angle limiting block; 18-Angle limiting groove; 19-Ring groove; 20-Handle; 21-Limiting ring; 22-Force application part. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0031] See Figures 1-4 This embodiment provides a hedge trimming device, including a working head 1, an extension pole 2 and a handle 3. One end of the extension pole 2 is detachably connected to the working head 1 via a connecting component, and the handle 3 is rotatably connected to the other end of the extension pole 2 via an angle adjustment component.

[0032] See Figure 1 The connecting component includes a slot disposed on the working head 1, and the connecting component also includes a socket 4 disposed on the extension rod 2, wherein the socket 4 is provided with a post 5 that mates with the slot; The working head 1 is provided with a hook 8 for locking the socket 4 onto the working head 1, and the socket 4 is provided with a hook 7 that cooperates with the hook 8.

[0033] Specifically, the connecting assembly includes a slot on the working head 1 and a socket 4 on the extension rod 2. The socket 4 has a pin 5 whose shape matches and can be inserted into the slot on the working head 1. A hook 8 is also installed on the working head 1, and this hook 8 is movable; correspondingly, a hook 7 is provided on the socket 4. When the pin 5 is inserted into the slot, the hook 8 and the hook 7 can engage with each other, thereby forming a mechanical lock. For ease of operation, the hook 8 has a pressing part 14, and an elastic element is installed between it and the working head 1 body, giving the hook 8 a tendency to return to its original position.

[0034] Furthermore, a pressing part 14 is provided on the hook body 8, and a first elastic element 6 is provided between the hook body 8 and the working head 1 to push the hook body 8 to cooperate with the hook 7; When the hook 8 engages with the hook 7, the hook 8 locks the socket 4 onto the working head 1 via the hook 7. When the pressing part 14 is operated to overcome the elastic force of the first elastic member 6 and disengage the hook 8 from the hook 7, the hook 8 unlocks the hook 7, making the socket 4 and the working head 1 removable.

[0035] Specifically, the hook body 8 has a pressing part 14 on the side facing the user, which is exposed outside the working head 1. A first elastic element 6, which can be a spring, is installed between the hook body 8 and the mounting base inside the working head 1. This elastic element constantly applies a pushing force to the hook body 8, causing it to tend to move towards the socket 4. When the socket 4 is installed in place by the engagement of the insertion post 5 with the slot, the hook body 8, driven by the first elastic element 6, will automatically engage its front hook-shaped portion into the corresponding hook 7 groove on the socket 4, forming a mechanical interlock. To disassemble, pressure must be applied to the hook body 8 with a finger, specifically to its pressing part 14. The pressure direction of the pressing part 14 is opposite to the force direction of the first elastic element 6. When the applied pressure is sufficient to overcome the elastic force of the first elastic element 6, the hook body 8 will shift or rotate, causing its front hook-shaped portion to completely disengage from the groove of the hook 7. Once disengaged, the mechanical lock between the socket 4 and the working head 1 is released, and the insertion post 5 can be pulled out of the slot to complete disassembly.

[0036] In addition, the hook body 8 is provided with a first inclined surface, and the hook 7 is provided with a second inclined surface that abuts against the first inclined surface. The hook 7 pushes the pressing part 16 to compress the first elastic member 6 through the first and second inclined surfaces, so that the hook body 8 passes over the hook 7 and is hooked together with the hook 7.

[0037] Specifically, during installation, as the insertion post 5 begins to enter the slot, the hook 7 on the socket 4 approaches the hook body 8 on the working head 1. At this time, the first inclined surface at the front end of the hook body 8 contacts and aligns with the second inclined surface at the front end of the hook 7. As the socket 4 is continuously pushed in, the mutual contact and sliding of the two inclined surfaces generate a force perpendicular to the direction of the inclined surfaces. This force is transmitted to the hook body 8 and further acts on the pressing part 14 connected to the hook body 8, thus converting into a driving force to overcome the elasticity of the first elastic element 6. Under this drive, the hook body 8, together with its pressing part 14, compresses the first elastic element 6 as a whole. This allows the hook-shaped front end of the hook body 8 to slide and rise along the inclined surface of the hook 7 until it completely passes over the hook 7, thereby releasing the elasticity stored in the first elastic element 6, pushing the hook body 8 to quickly spring back to its original position, and its hook-shaped front end then falls down and securely engages in the locking groove inside the hook 7, completing the automatic engagement.

[0038] See Figure 2To enable the working head 1 to be flexibly adjustable in angle, based on any of the above solutions, the connecting assembly further includes a socket 4 disposed on the extension rod 2. The extension rod 2 is rotatably disposed on the socket 4 via an adjustment assembly. The adjustment assembly includes a locked state and an unlocked state. When the adjustment assembly is in the locked state, the angle between the extension rod 2 and the socket 4 is locked. When the adjustment assembly is in the unlocked state, the angle between the extension rod 2 and the socket 4 is adjustable.

[0039] The adjustment assembly includes a connector 9, a first gear ring 10, and a second gear ring 11. The extension rod 2 is rotatably mounted on the socket 4 via the connector 9. The first gear ring 10 is mounted on the socket 4, and the second gear ring 11 is mounted on the connector 9. The adjustment assembly also includes a sliding gear 12 disposed between the first gear ring 10 and the second gear ring 11. A second elastic element that pushes the sliding gear 12 is disposed between the sliding gear 12 and the connector 9. When the second elastic member pushes the sliding gear 12 so that a part of the sliding gear 12 enters the first gear ring 10 and the other part of the sliding gear 12 is located in the second gear ring 11, the sliding gear 12 locks the angle of the connector 9 relative to the socket 4; the sliding gear 12 is provided with a force-applying part 22, and the pressing part 14 provided on the sliding gear 12 overcomes the force of the second elastic member to disengage the sliding gear 12 from the first gear ring 10, so that the angle of the connector 9 relative to the socket 4 is adjustable.

[0040] Specifically, the adjustment assembly includes a connector 9, a first gear ring 10, a second gear ring 11, and a sliding gear 12. The connector 9 is fixedly connected to the extension rod 2 via a clamp and is rotatably mounted on the socket 4. The first gear ring 10 is disposed on the inner circumference of the socket 4, and the second gear ring 11 is disposed on the inner circumference of the connector 9, arranged coaxially opposite each other. The sliding gear 12 is axially disposed between the first gear ring 10 and the second gear ring 11, and is axially slidably disposed on the connector 9 and the socket 4. A second elastic element, which can be a spring, is installed between the sliding gear 12 and the connector 9, applying a continuous axial thrust to the sliding gear 12, causing it to tend to slide towards the first gear ring 10.

[0041] In the normal operating locked state, the second elastic element pushes the sliding gear 12 towards the first gear ring 10, causing a portion of the teeth of the sliding gear 12 to mesh into the tooth groove of the first gear ring 10, while the other portion of its teeth remains in the tooth groove of the second gear ring 11. At this time, through the simultaneous meshing of the sliding gear 12 with both gear rings, the relative rotation between the connector 9 and the socket 4 is prevented, thereby achieving angle locking.

[0042] The sliding gear 12 is provided with a force-applying part 22, which extends to a position on the outer casing accessible by fingers. When angle adjustment is required, the operator applies a force to the sliding gear 12 through the force-applying part 22, opposite to the direction of the pushing force of the second elastic element. When this force overcomes the elastic force of the second elastic element, the sliding gear 12 moves axially, causing its teeth to completely disengage from the tooth grooves of the first gear ring 10, retaining only engagement with the second gear ring 11. At this time, the connector 9, along with its extension rod 2, can rotate freely relative to the socket 4 for angle adjustment. After releasing the force-applying part 22, the second elastic element pushes the sliding gear 12 back, causing it to engage with the first gear ring 10, thereby relocking it at the new angle position.

[0043] In addition, the cross-sectional shape of the plug 5 is polygonal, and the plug 5 and the socket 4 are an integral structure.

[0044] See Figure 3 To further flexibly adjust the angle of the extension rod 2, based on any of the above solutions, the angle adjustment assembly includes a fixed base fixed to the extension rod 2, and the angle adjustment assembly also includes a pressing part 16 disposed on the fixed base. The pressing part 16 is slidably connected to the fixed base along the radial direction of the extension rod 2. The fixed base is provided with a rotating cavity. The pressing part 16 is provided with an angle limiting block 17. The rotating cavity is provided with an angle limiting groove 18 that cooperates with the angle limiting block 17. There are multiple angle limiting grooves 18, and the multiple angle limiting grooves 18 are arranged circumferentially along the rotating cavity. The fixed base is also provided with a third elastic element that pushes the pressing part 16 to engage with the angle limiting block 17 and the angle limiting groove 18.

[0045] The angle adjustment assembly also includes a rotating cavity disposed on the handle 3, the rotating cavity extending into the rotating cavity, and a limiting ring 21 disposed on the rotating cavity to prevent the handle 3 from disengaging from the extension rod 2 along the length direction of the extension rod 2, and a ring groove 19 disposed on the fixed base to cooperate with the limiting ring 21.

[0046] Specifically, the angle adjustment assembly includes a fixed base fixedly connected to the extension rod 2 via a clamp, and a pressing part 16 mounted on the fixed base. The pressing part 16 can slide on the fixed base radially along the extension rod 2, i.e., perpendicular to the rod's axis. The fixed base has a circular rotating cavity inside, and the inner end of the pressing part 16 extends into this cavity and is connected to an angle limiting block 17. Multiple angle limiting grooves 18 are evenly formed along the circumference of the inner wall of the rotating cavity. A third elastic element, a spring, is also installed inside the fixed base. One end of the spring acts on the pressing part 16, and the other end acts on the fixed base, thereby continuously providing the pressing part 16 with a spring force pointing towards the center of the rotating cavity, causing it to maintain an inward sliding tendency, and thus pushing the angle limiting block 17 to tend to engage with a certain angle limiting groove 18.

[0047] The handle 3 has a rotating cavity at its end, which is fitted into the rotating cavity of the fixed base and can rotate freely about the axis of the extension rod 2. An annular protrusion, a limiting ring 21, is integrally formed or fixedly provided on the outer side or end of the rotating cavity. Correspondingly, an annular groove, i.e., an annular groove 19, matching the shape of the limiting ring 21, is provided on the inner wall or corresponding end face of the rotating cavity of the fixed base. In the assembled state, the limiting ring 21 is nested within the annular groove 19. The axial width of the annular groove 19 is slightly greater than the thickness of the limiting ring 21, allowing the limiting ring 21, the connected rotating cavity, and the handle 3 to rotate freely circumferentially within the annular groove 19. However, at the same time, the sidewall of the annular groove 19 constrains the limiting ring 21 axially, thereby preventing the handle 3 from being pulled axially out of the extension rod 2.

[0048] In order to facilitate assembly, based on any of the above schemes, the working head 1 includes a left half and a right half, which are connected by screws. The left half is provided with a left groove, and the right half is provided with a right groove. The left groove and the right groove cooperate to form a through hole through which the pressing part 14 extends out of the working head 1.

[0049] The following explanation, based on the working principle, further illustrates this utility model: First, align the socket 4 of the extension rod 2 with the slot on the working head 1 and push it in. At this time, the inclined surface of the hook 7 will press against the inclined surface of the hook body 8, causing it to automatically retract until the insertion post 5 is fully inserted. Then, the hook body 8 will spring back under the action of the first elastic element 6 and lock with the hook 7, completing the quick installation of the working head 1. When it is necessary to adjust the relative angle between the working head 1 and the extension rod 2, the force application part 22 on the sliding gear 12 can be operated to overcome the elastic force of the second elastic element and disengage from the first gear ring 10. At this time, the extension rod 2 can be freely rotated to the desired angle. After releasing the force application part 22, the sliding gear 12 re-engages to achieve locking. When adjusting the angle of the handle 3, press the pressing part 16 on the fixed base to disengage the angle limiting block 17 from the current angle limiting groove 18. While keeping the pressing down, rotate the handle 3 to the desired position. After releasing the pressing part 16, the limiting block will engage with the new angle limiting groove 18 under the action of the third elastic element to complete the locking. During disassembly, press the pressing part 14 of the hook 8 on the working head 1 to disengage it from the hook 7, and then pull the extension rod 2 socket 4 out of the slot of the working head 1.

[0050] This utility model is not limited to the above-mentioned optional embodiments. Under the premise of non-contradiction, the various solutions can be combined arbitrarily. Anyone can derive other forms of products under the guidance of this utility model. However, no matter what changes are made in their shape or structure, all technical solutions that fall within the scope of the claims of this utility model are within the protection scope of this utility model.

Claims

1. A hedge trimming device, characterized in that: It includes a working head, an extension rod, and a handle. One end of the extension rod is detachably connected to the working head via a connecting assembly, and the handle is rotatably connected to the other end of the extension rod via an angle adjustment assembly.

2. The hedge trimming device according to claim 1, characterized in that: The connecting assembly includes a slot disposed on the working head, and the connecting assembly also includes a socket disposed on the extension rod, the socket having a pin that mates with the slot; The working head is provided with a hook body to lock the socket to the working head, and the socket is provided with a hook body that cooperates with the hook body.

3. A hedge trimming device according to claim 2, characterized in that: The hook body is provided with a pressing part, and a first elastic element is provided between the hook body and the working head to push the hook body to cooperate with the hook. When the hook body engages with the hook, the hook body locks the socket onto the working head via the hook. When the pressing part is operated to overcome the elastic force of the first elastic element and disengage the hook body from the hook, the hook body unlocks the hook, making the socket and the working head removable.

4. A hedge trimming device according to claim 3, characterized in that: The hook body is provided with a first inclined surface, and the hook is provided with a second inclined surface that abuts against the first inclined surface. The hook pushes the pressing part to compress the first elastic element through the first and second inclined surfaces, so that the hook body passes over the hook and is hooked together with the hook.

5. A hedge trimming device according to claim 1, characterized in that: The connecting assembly further includes a socket disposed on the extension rod. The extension rod is rotatably disposed on the socket via an adjustment assembly. The adjustment assembly includes a locked state and an unlocked state. When the adjustment assembly is in the locked state, the angle between the extension rod and the socket is locked. When the adjustment assembly is in the unlocked state, the angle between the extension rod and the socket is adjustable.

6. A hedge trimming device according to claim 5, characterized in that: The adjustment assembly includes a connector, a first gear ring, and a second gear ring. The extension rod is rotatably mounted on the socket via the connector. The first gear ring is mounted on the socket, and the second gear ring is mounted on the connector. The adjustment assembly also includes a sliding gear disposed between the first gear ring and the second gear ring. A second elastic element that pushes the sliding gear is disposed between the sliding gear and the connector. When the second elastic element pushes the sliding gear so that a part of the sliding gear enters the first gear ring and the other part of the sliding gear is located in the second gear ring, the sliding gear locks the angle of the connector relative to the socket; the sliding gear is provided with a force-applying part, and the pressing part provided on the sliding gear overcomes the force of the second elastic element to disengage the sliding gear from the first gear ring, so that the angle of the connector relative to the socket is adjustable.

7. A hedge trimming device according to claim 2, characterized in that: The cross-sectional shape of the plug is polygonal, and the plug and the socket are an integral structure.

8. A hedge trimming device according to claim 1, characterized in that: The angle adjustment assembly includes a fixed base fixed to the extension rod, and a pressing part disposed on the fixed base. The pressing part is slidably connected to the fixed base along the radial direction of the extension rod. A rotating cavity is disposed inside the fixed base. An angle limiting block is disposed on the pressing part. An angle limiting groove that cooperates with the angle limiting block is disposed on the rotating cavity. There are multiple angle limiting grooves, which are disposed along the circumference of the rotating cavity. A third elastic element is also disposed on the fixed base to push the pressing part and the angle limiting block to engage with the angle limiting groove.

9. A hedge trimming device according to claim 8, characterized in that: The angle adjustment assembly further includes a rotating cavity disposed on the handle, the rotating cavity extending into the rotating cavity, and a limiting ring disposed on the rotating cavity to prevent the handle from disengaging from the extension rod along the length direction of the extension rod, and a ring groove disposed on the fixing base to cooperate with the limiting ring.

10. A hedge trimming device according to claim 3, characterized in that: The working head includes a left half and a right half, which are connected by screws. The left half is provided with a left groove, and the right half is provided with a right groove. The left groove and the right groove cooperate to form a through hole through which the pressing part extends out of the working head.

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