Simple grass hitting head

Abstract

A simple grass trimmer head includes a main body, consisting of an upper cover and a base plate connected vertically. The lower end of the upper cover has a fixing cavity for mounting the grass trimming line. After the base plate is fixedly connected to the upper cover, the fixing cavity forms a line inlet on the inner outer surface of the upper cover away from its side and a line outlet on the side of the upper cover. A connecting mounting channel is formed between the line inlet and the line outlet. A pawl is located beside the mounting channel, and a spring acts on the pawl, causing the end of the pawl to always tend to move towards and abut against the mounting channel, thereby restricting the free movement of the grass trimming line within the mounting channel. This invention solves the problem that existing simple grass trimmer heads cannot directly use bare lines of any length that users can arbitrarily cut from rolled grass trimming lines. It enables the immediate use of grass trimming lines of any length without the need for additional auxiliary accessories, reducing user costs, improving ease of use and reliability, and avoiding the risk of line detachment.

Description

Technical Field

[0001] This utility model relates to a grass trimmer, specifically a simple grass trimmer. Background Technology

[0002] The trimmer head (also known as the trimmer line head, mowing head, or line reel) is the core working component of a handheld lawnmower (brush cutter / mower), mounted on the drive shaft at the end of the machine. Its main function is to cut weeds, shrubs, or lawn edges using a high-speed rotating trimmer line.

[0003] Existing hay trimmers have a relatively complex structure, with a long section of trimming line wound and coiled inside. If the trimming line breaks during use, the still-rotating trimmer head can be struck against the ground, causing the trimming line inside to be flung out due to centrifugal force. These types of trimmers are large and heavy due to the internal trimming line.

[0004] Another simpler type of mowing head involves threading a short section of mowing line through the outlet, with a flattened sleeve at the end of the line securing it inside. This type of mowing line needs to be purchased separately, and using pre-rolled mowing line by cutting off a section can be difficult. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problem that existing simple hay trimmers cannot use a section of hay trimmer line that can be arbitrarily cut from a roll of hay trimmer line. It provides a simple hay trimmer that allows users to easily cut a section from a roll of hay trimmer line for fixed installation, which is a troublesome process.

[0006] The technical solution to the problem that this utility model aims to solve is as follows:

[0007] A simple grass trimmer head includes a main body, which is composed of an upper cover and a base plate connected vertically. The lower end of the upper cover is provided with a fixing cavity for installing the grass trimming line. After the base plate is fixedly connected to the upper cover, the fixing cavity forms an inlet on the inner outer surface of the upper cover away from the side and an outlet on the side of the upper cover. A connecting installation and fixing channel is formed between the inlet and the outlet. A pawl is provided on the side of the installation and fixing channel. A spring acts on the pawl, so that the end of the pawl always tends to move towards the installation and fixing channel and abut against it, thereby restricting the free movement of the grass trimming line within the installation and fixing channel.

[0008] Preferably, the spring is a torsion spring, and the upper cover has a column located near the mounting channel, with the torsion spring sleeved on the column; the upper cover has a fixing groove for the first torsion arm of the torsion spring to engage and position; when the pawl is sleeved on the column base plate and installed on the upper cover, it presses against the torsion spring, and the second torsion arm of the torsion spring is engaged in the movable groove on the side of the pawl, so that the torsion spring applies a biasing force to the pawl, causing its end to press towards the mounting channel.

[0009] Preferably, the upper cover has a recessed area at its center, and a mounting hole is provided in the middle of the recessed area for mounting the main body on the drive shaft of the lawn mower.

[0010] Preferably, a stud is provided on the inner side of the upper cover, and the base plate is fixed to the stud and the upper cover by screws to form the main body.

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

[0012] This utility model employs a ratchet pawl for fixing the trimming line during installation, achieving compatibility with bare lines of any length. Users can simply cut a section for use. Furthermore, the ratchet pawl automatically locks the line by elastically pressing and blocking the channel, eliminating the need for auxiliary parts such as sleeves and clips. It is perfectly compatible with all standard trimming lines, reducing user procurement costs. In addition, the one-way locking function of the ratchet pawl reduces the failure rate after the trimming line is fixed in the trimming head, eliminating the risk of line detachment. Attached Figure Description

[0013] 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.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 yes Figure 2 Exploded structural diagram;

[0016] Figure 3 yes Figure 1 Schematic diagram of an implementation example;

[0017] Figure 4 yes Figure 3 A schematic diagram of the top cover after flipping it over. Detailed Implementation

[0018] 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.

[0019] 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.

[0020] See Figures 1 to 4 A simple grass trimmer head includes a main body, which is composed of an upper cover 1 and a base plate 5 assembled by axial stacking. The upper cover 1 can be a snap-fit ​​structure or fixed to the base plate 5 by screws. The lower end of the upper cover 1 has a fixing cavity 12 for installing the grass trimming line A. After the base plate 5 is fixedly connected to the upper cover 1, the fixing cavity 12 forms an inlet 2 on the inner outer surface of the upper cover 1 away from the side, and an outlet 11 on the side of the upper cover 1. A connecting mounting and fixing channel 10 is formed between the inlet 2 and the outlet 11. A pawl 4 is located beside the mounting and fixing channel 10. A spring acts on the pawl 4, causing the end of the pawl 4 to always tend to move towards and abut against the mounting and fixing channel 10, thereby restricting the free movement of the grass trimming line A within the mounting and fixing channel 10.

[0021] During implementation, the user cuts any length of trimming line A, inserts the end of the line through the inlet 2 into the installation and fixing channel 10, and manually pulls it to the outlet 11. At this time, the pawl 4 automatically presses the trimming line A under the action of the torsion spring 3, forming a mechanical self-locking mechanism. Figure 3 (As indicated by the arrow from in to out), the traditional sleeve clamping structure at the outlet is completely eliminated. Moreover, during the process, due to the installation position and structure of the pawl 4, the mowing line A can only be threaded in one direction. That is, when mowing, the end of the pawl 4 presses down on the mowing line to prevent the mowing line A from retracting.

[0022] This embodiment achieves true bare wire ready-to-use for the first time on a simple grass trimmer head by using the installation and fixing channel 10 through which the grass trimmer line A passes and the pawl 4. That is, the user can cut any length of grass trimmer line and directly insert it into the installation and fixing channel 10 from the inlet 2 and out from the outlet 11. The pawl 4 can then lock the grass trimmer line in one direction in the installation and fixing channel.

[0023] Furthermore, as an improvement to this utility model, the spring is a torsion spring 3, and the upper cover 1 is provided with a column 8 near the mounting and fixing channel 10, and the torsion spring 3 is sleeved on the column 8; the upper cover 1 is provided with a fixing groove for the first torsion arm 32 of the torsion spring 3 to be engaged and positioned; when the pawl 4 is sleeved on the bottom plate 5 of the column 8 and installed on the upper cover 1, it presses against the torsion spring 3, and the second torsion arm 31 of the torsion spring 3 is engaged in the movable groove provided on the side of the pawl 4, so that the torsion spring 3 applies a biasing force to the pawl 4, causing its end to press against the mounting and fixing channel 10.

[0024] In this embodiment, a torsion spring 3 is used, which causes the free end of the pawl 4 to generate a radial locking force perpendicular to the channel axis under the preload of the torsion spring 3. The second torsion arm 31 and the movable groove 41 on the side of the pawl 4 form a sliding pair, which converts the torsion spring torque into radial pressure on the pawl 4.

[0025] Furthermore, as an improvement to this utility model, the upper cover 1 has a recessed area in the center, and a mounting hole 13 is provided in the middle of the recessed area for the main body to be installed on the drive shaft of the lawn mower.

[0026] Furthermore, as an improvement to this utility model, a stud 7 is provided on the inner side of the upper cover 1, and the bottom plate 5 is fixed to the stud 7 by screws 6 to form the main body together with the upper cover 1.

[0027] In this embodiment, the base plate 5 is detachably axially pressed with the inner stud of the top cover by screws 6. After the top cover 1 is made of aluminum, there are no technical problems in connecting it with the base plate 5.

[0028] 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 simple grass trimmer, characterized in that, include: The main body consists of an upper cover and a bottom plate connected vertically. The lower end of the upper cover is provided with a fixing cavity for installing the grass trimming line; After the base plate is fixedly connected to the upper cover, the fixing cavity forms an inlet on the inner outer surface of the upper cover away from the side and an outlet on the side of the upper cover. A connecting installation and fixing channel is formed between the inlet and outlet; A pawl is provided on the side of the mounting channel. A spring acts on the pawl, so that the end of the pawl always tends to move toward the mounting channel and abut against it, thereby restricting the free movement of the mowing line within the mounting channel.

2. The simple grass trimmer according to claim 1, characterized in that: The spring is a torsion spring. A column is provided on the top cover near the mounting channel, and the torsion spring is sleeved on the column. The top cover is provided with a fixing groove for the first torsion arm of the torsion spring to engage and position. When the pawl is sleeved on the column base plate and installed on the top cover, it presses against the torsion spring. The second torsion arm of the torsion spring is engaged in the movable groove on the side of the pawl, so that the torsion spring applies a biasing force to the pawl, causing its end to press towards the mounting channel.

3. The simple hay trimmer according to claim 1, characterized in that: The upper cover has a recessed area in the center, and a mounting hole is provided in the middle of the recessed area for the main body to be installed on the drive shaft of the lawn mower.

4. The simple hay trimmer according to claim 1, characterized in that: A stud is provided on the inner side of the upper cover, and the base plate is fixed to the stud and the upper cover by screws to form the main body.

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