A grass cutting head for easy wire winding installation

Abstract

A conveniently mounted grass trimmer head, characterized by comprising: a disc-shaped main body, which is formed by an upper cover axially rotating and assembling to a bottom shell; an L-shaped locking arm is provided below the upper cover, and an elastic locking arm is provided inside the bottom shell. The L-shaped locking arm is inserted into the elastic locking arm of the bottom shell via the rotation of the upper cover, and forms a locking engagement with the elastic locking arm to achieve axial fixation between the upper cover and the bottom shell; a winding groove is provided above the L-shaped locking arm for accommodating the winding of the grass trimmer line; a line-blocking post extends upward from the bottom shell, and the line-blocking post is located radially outside the winding groove to block and support the grass trimmer line when the grass trimmer head rotates. This invention, through the cooperation of the L-shaped locking arm of the upper cover and the elastic locking arm of the bottom shell, and through a unique rotational assembly locking mechanism, allows users to reliably lock and separate the upper cover and the bottom shell by hand without any tools, greatly simplifying the assembly and disassembly process, making it convenient and efficient for manual operation.

Description

Technical Field

[0001] This utility model relates to grass trimming heads in the field of garden tools, specifically to grass trimming heads that are easy to install with a cord. Background Technology

[0002] There is a grass trimmer head (locking structure) that internally accommodates grass trimming line. The grass trimmer head is composed of an upper cover and a lower housing connected by a lock. Each time the grass trimming line is installed, a tool is needed to press the locking tongue of the lock structure to separate the upper cover and the lower housing. After the grass trimming line is wound, the grass trimming line needs to be pulled out from the outlet provided on the upper cover or the lower housing. The convenience of use needs to be improved.

[0003] Another type of grass trimmer (spring-compressed rotating inner seat structure) uses a spring to compress a rotating inner seat, allowing the grass trimmer line wound on it to centrifugally exit from the side outlet. This type of grass trimmer also has the problem of inconvenient operation when disassembling. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the aforementioned grass trimmer heads and provide a grass trimmer head that is convenient for winding and installation. This grass trimmer head primarily solves the technical problems of existing technologies where grass trimmer head assembly and disassembly rely on tools, and the installation of grass trimming line is cumbersome and inconvenient. It aims to enable users to quickly and manually assemble / disassemble the grass trimmer head and independently wind the grass trimming line, significantly improving ease of use and efficiency.

[0005] The technical solution to the problem that this utility model aims to solve is as follows:

[0006] A grass trimmer head for easy winding and installation is characterized by comprising: a disc-shaped main body, which is formed by an upper cover being axially rotated and assembled onto a bottom shell; an L-shaped locking arm is provided below the upper cover, and an elastic locking arm is provided inside the bottom shell. The L-shaped locking arm is inserted into the elastic locking arm of the bottom shell by rotating the upper cover, and forms a locking engagement with the elastic locking arm to achieve axial fixation between the upper cover and the bottom shell; a winding groove is provided above the L-shaped locking arm for accommodating the winding of grass trimmer line; and a line-blocking post extends upward from the bottom shell, which is located radially outside the winding groove to block and support the grass trimmer line when the grass trimmer head rotates.

[0007] Preferably, the head of the L-shaped locking arm is a hook-shaped block, and the area behind the L-shaped locking arm after passing the hook-shaped block is the locking area; when the elastic locking arm contacts the L-shaped locking arm, the head of the elastic locking arm slides along the surface of the hook-shaped block and is forced to deform; when the head of the elastic locking arm has completely slid past the hook-shaped block, the elastic locking arm elastically resets, and the head of the elastic locking arm falls into and is confined within the locking area.

[0008] Preferably, the upper cover of the disc-shaped body is provided with a handle screw cap, and the circumferential side wall of the upper cover is provided with a wire-holding groove for holding the end of the grass-cutting line.

[0009] Preferably, the bottom shell is further provided with an outwardly extending reinforcing locking block, and an L-shaped auxiliary locking arm is provided below the top cover corresponding to the reinforcing locking block.

[0010] Preferably, the L-shaped auxiliary positioning arm is disposed on the inner side of the L-shaped positioning arm.

[0011] The beneficial effects of this utility model are as follows:

[0012] Compared with the prior art, this utility model, through the cooperation of the L-shaped locking arm of the upper cover and the elastic locking arm of the bottom shell, and through a unique rotating assembly locking mechanism, allows users to reliably lock and separate the upper cover and the bottom shell by hand without the aid of any tools, greatly simplifying the assembly and disassembly process, making it convenient and efficient to operate by hand.

[0013] Compared with existing technologies, the rotary locking mechanism of this invention (such as the cooperation between the hook-shaped block and the locking area) combined with the deformation and reset of the elastic locking arm achieves reliable locking and unlocking functions. The optional addition of a reinforcing locking block and an L-shaped auxiliary locking arm further enhances the overall structural stability, and the structure is optimized for high reliability.

[0014] Compared to existing technologies, the winding groove located above the L-shaped locking arm allows users to independently and conveniently wind the mowing line, whether the top cover and bottom shell are separated or only the top cover is being operated. The operation is intuitive and unaffected by other components. The design of the line-stopping post effectively prevents the wound line from coming loose when the mowing head rotates.

[0015] Compared with existing technologies, the design of the hand-held screw cap and wire-locking groove makes the rotation assembly operation less strenuous and facilitates temporary fixation of the wire end during winding. The overall design significantly improves the comfort and convenience of user operation and enhances the user experience. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 yes Figure 1 A structural decomposition diagram;

[0019] Figure 3 yes Figure 2 Another perspective on the structural breakdown diagram;

[0020] Figure 4 This is a schematic diagram of the partial resection structure of this utility model;

[0021] Figure 5 This is a schematic diagram of an embodiment of the present utility model. Detailed Implementation

[0022] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are provided solely for the purpose of clearly illustrating the technical solution of the present invention, offering numerous specific details to provide a more thorough understanding. However, those skilled in the art will recognize that the present invention can be implemented without one or more of these details. In these examples, to avoid confusion with the present invention, some technical features known in the art have not been described.

[0023] It should be understood that the present invention can be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. Therefore, these embodiments are merely examples and should not be used to limit the scope of protection of the present invention.

[0024] See Figures 1 to 5 The tweezer head, which facilitates winding and installation, includes a disc-shaped main body. This main body is composed of an upper cover 1 that is axially rotated and assembled onto a bottom shell 2. An L-shaped locking arm 14 is provided below the upper cover 1, and an elastic locking arm 23 is provided inside the bottom shell 2. The L-shaped locking arm 14 is inserted into the bottom shell 2 from one side of the elastic locking arm 23 by rotating the upper cover 1, and forms a locking engagement with the elastic locking arm 23 to achieve axial fixation between the upper cover 1 and the bottom shell 2. A winding groove 16 is provided above the L-shaped locking arm 14 to accommodate the winding of the tweezer line A. A line-blocking post 3 extends upward from the bottom shell 2. The line-blocking post 3 is located radially outside the winding groove 16 and is used to block and support the tweezer line A when the tweezer head rotates.

[0025] During implementation, press the elastic locking arm 23 inward from the outer surface of the bottom shell 2 while simultaneously rotating the top cover 1. The L-shaped locking arm 14 below the top cover 1 disengages from the elastic locking arm 23. At this point, the top cover 1 can be easily rotated off the bottom shell 2 and opened outward with force. Then, the hay trimming line A is wound into the winding groove 16. Usually, both ends of the hay trimming line can protrude from the winding groove 16. Then, the top cover 1 is pressed down on the bottom shell 2 again and rotated to allow the L-shaped locking arm 14 to engage with the elastic locking arm 23. The entire process can be completed by hand, and the switching between locking and unlocking is exceptionally convenient.

[0026] Continue reading Figure 5The portions of the mowing line A exposed at both ends of the winding groove 16 need to be pulled out to a length sufficient for mowing. This length must be extended within the space between the two guide posts 3. When the mowing head is mounted on the drive shaft of the mower for rotation, the mowing line A will deflect towards one guide post due to centrifugal force. The guide post 3 prevents the mowing line A exposed in the winding groove 16 and the area outside the guide post 3 from detaching from the wound mowing line. When the mowing line A is broken, simply tuck the broken end of the mowing line A inward around the guide post to move it closer to the next guide post 3. If the length of the mowing line A is insufficient at this point, it can be moved to the next guide post 3, and so on, until the mowing line A is completely consumed.

[0027] Furthermore, as an improvement to this utility model, the head of the L-shaped locking arm 14 is a hook-shaped block 141, and the area behind the L-shaped locking arm 14 after passing the hook-shaped block 141 is the locking area 142; when the elastic locking arm 23 contacts the L-shaped locking arm 14, the head of the elastic locking arm 23 slides along the surface of the hook-shaped block 141 and is forced to deform. When the head of the elastic locking arm 23 has completely slid past the hook-shaped block 141, the elastic locking arm 23 elastically resets, and the head of the elastic locking arm 23 falls into and is confined within the locking area 142.

[0028] During implementation, the locking area 142 and the head of the elastic locking arm 23 are level on the horizontal plane, and the hook-shaped block 141 is higher than the head of the elastic locking arm 23. Therefore, when the head of the elastic locking arm 23 contacts the hook-shaped block 141, it is forced to deform due to its elasticity and slides along the surface of the hook-shaped block 141. After passing the hook-shaped block 141, the head of the elastic locking arm 23 resets and falls back into the level locking area 142.

[0029] Furthermore, as an improvement to this utility model, a hand-held screw cap 12 is provided above the upper cover 1 that makes up the disc-shaped main body, and a wire-holding groove 11 for holding the end of the grass-cutting line A is provided on the circumferential side wall of the upper cover 1.

[0030] The purpose of the wire groove 11 is to allow the grass trimmer to be used when it is no longer in use, or when the grass trimmer has been wrapped with the grass trimmer line and is still in the sale period.

[0031] Furthermore, as an improvement to this utility model, a reinforcing locking block extending outward is provided on the bottom shell 2, and an L-shaped auxiliary locking arm 15 is provided below the top cover 1 corresponding to the reinforcing locking block.

[0032] During implementation, the L-shaped auxiliary locking arm 15 slides under the reinforcing locking block, which can enhance the stability of the upper cover 1 and the lower shell 2 after assembly.

[0033] Furthermore, as an improvement to this utility model, the L-shaped auxiliary positioning arm 15 is disposed on the inner side of the L-shaped positioning arm 14.

[0034] In practice, the above configuration enhances the strength of the L-shaped locking arm 14.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A grass trimmer head that is easy to install with wire winding, characterized in that, include: The disc-shaped main body is composed of an upper cover that is axially rotated and assembled onto a bottom shell. An L-shaped locking arm is located below the upper cover, and an elastic locking arm is located inside the bottom shell. The L-shaped locking arm is inserted into the elastic locking arm of the bottom shell via the rotation of the upper cover, forming a locking engagement with the elastic locking arm to achieve axial fixation between the upper cover and the bottom shell. A winding groove is located above the L-shaped locking arm to accommodate the winding of the mowing line. A line-blocking post extends upward from the bottom shell, located radially outside the winding groove, to block and support the mowing line when the mowing head rotates.

2. The grass trimmer head for convenient winding and installation according to claim 1, characterized in that: The head of the L-shaped locking arm is a hook-shaped block. After passing the hook-shaped block with a protruding head, the area behind the L-shaped locking arm is the locking area. When the elastic locking arm contacts the L-shaped locking arm, the head of the elastic locking arm slides along the surface of the hook-shaped block and is forced to deform. After the head of the elastic locking arm has completely slid past the hook-shaped block, the elastic locking arm elastically resets, and the head of the elastic locking arm falls into and is confined within the locking area.

3. The grass trimmer head for convenient winding and installation according to claim 1, characterized in that: The upper cover of the disc-shaped body is provided with a handle screw cap, and the circumferential side wall of the upper cover is provided with a wire-holding groove for holding the end of the grass-cutting line.

4. The grass trimmer head for convenient winding and installation according to claim 1, characterized in that: The bottom shell is also provided with an outwardly extending reinforcing locking block, and an L-shaped auxiliary locking arm is provided below the top cover corresponding to the reinforcing locking block.

5. The grass trimmer head for convenient winding and installation according to claim 4, characterized in that: The L-shaped auxiliary positioning arm is located on the inner side of the L-shaped positioning arm.

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