Grass trimmer head and grass trimmer line suitable for a grass trimmer head

A grass trimmer line includes a first line body having a first free end and a first non-free end and a second line body having a second free end and a second non-free end. A length of the second line body is substantially equal to a length of the first line body. The first line body has a first feature, the second line body has a second feature corresponding to the first feature, and the second feature is different from the first feature. A connecting portion is configured to connect the first non-free end of the first line body and the second non-free end of the second line body so that the first line body and the second line body are connected into the complete grass trimmer line.

RELATED APPLICATION INFORMATION

This application claims the benefit under 35 U.S.C. § 119(a) of Chinese Patent Application No. CN 201910171300.9, filed on Mar. 7, 2019, and Chinese Patent Application No. CN 201911399580.5, filed on Dec. 30, 2019, each of which is incorporated by reference in its entirety herein.

TECHNICAL FIELD

The present disclosure relates to an accessory in the field of garden tools, and in particular to a grass trimmer line used for a grass trimmer.

BACKGROUND

As a commonly used garden tool, a grass trimmer generally includes a grass trimmer head for trimming, and the grass trimmer head is used for mounting a grass trimmer line to cut vegetation when driven by a motor. The grass trimmer line usually has a certain storage length accommodated in the grass trimmer head. At present, two types of winding, i.e., manual winding and automatic winding, exist when the grass trimmer line is wound to the grass trimmer head. Regardless of manual winding or automatic winding, in order to ensure the trimming efficiency, the lengths of the grass trimmer line on two sides of the grass trimmer head are expected to be approximately equal. At present, most grass trimmer lines have a single design. A user can merely align the center point of the grass trimmer line with the center axis of the grass trimmer head through manual adjustment, which will waste the user's working time and reduce working efficiency.

SUMMARY

In one aspect of the disclosure, a grass trimmer line suitable for a grass trimmer head includes: a first line body including a first free end and a first non-free end; a second line body including a second free end and a second non-free end, where a length of the second line body is substantially equal to a length of the first line body, the first line body has a first feature, the second line body has a second feature corresponding to the first feature, and the second feature is different from the first feature; and a connecting portion configured to connect the first non-free end of the first line body and the second non-free end of the second line body, so that the first line body and the second line body are connected into the complete grass trimmer line.

In another aspect of the disclosure, a grass trimmer line suitable for a grass trimmer head includes: a first line body including a first free end and a first non-free end; and a second line body including a second free end and a second non-free end. A length of the second line body is substantially equal to a length of the first line body, the first line body has a first feature, the second line body has a second feature corresponding to the first feature, and the second feature is different from the first feature; the second non-free end is connected to the first non-free end.

In one aspect of the disclosure, a grass trimmer head includes a spool, which is configured for a grass trimmer line winding around; a head housing, which is formed with an accommodation space for accommodating at least part of the spool, is further formed with a left threading hole for the grass trimmer line to come out from a left side of the grass trimmer head, and is further formed with a right threading hole for the grass trimmer line to come out from a right side of the grass trimmer head. The grass trimmer line includes: a first line body including a first free end and a first non-free end; a second line body including a second free end and a second non-free end, where a length of the second line body is substantially equal to a length of the first line body, the first line body has a first feature, the second line body has a second feature corresponding to the first feature, and the second feature is different from the first feature; and a connecting portion configured to connect the first non-free end of the first line body and the second non-free end of the second line body, so that the first line body and the second line body are connected into the complete grass trimmer line.

The advantage of the present disclosure is that: the grass trimmer line of the present disclosure is specially designed and has obvious visualization effects, which can enable the operator to quickly find the midpoint or quickly align with the grass trimmer head, and thus, the winding efficiency of the operator is improved.

DETAILED DESCRIPTION

As shown inFIG. 1, a cutting tool10is used for trimming lawns, weeds, and other vegetation. In this example, the cutting tool is a grass trimmer. Of course, it can be understood that in other examples, the cutting tool may also be a lawn mower, a brush cutter, an edge trimmer, etc.

The cutting tool10includes an operation component10aand a cutting component. The operation component10ais used for operation by a user. For the grass trimmer, the cutting component is a grass trimmer head100. As shown inFIG. 1andFIG. 2, the cutting tool10includes a motor11, which is used for driving the grass trimmer head100to rotate, and a grass trimmer line15is mounted on the grass trimmer head100. When the motor11drives the grass trimmer head100to rotate, the grass trimmer head100drives the grass trimmer line15to rotate at a high speed, so that the grass trimmer line15rotating at a high speed can cut vegetation. The grass trimmer head100includes a head housing12aand a spool14. The head housing includes an upper cover12and a lower cover13, the spool14is driven to rotate by the motor11, and the spool14is at least partially disposed in an accommodation space surrounded by the head housing. The upper cover12and the lower cover13are snapped together to form the accommodation space, the spool14is mounted in the accommodation space, and the motor drives the spool14to rotate. The spool14is provided with a thread entry hole and a thread exit hole for the grass trimmer line15to pass through. The lower cover13includes a left thread entry hole and a right thread exit hole. The head housing12ais further formed with a left threading hole12bfor the grass trimmer line15to come out from the left side of the grass trimmer head100, is further formed with a right threading hole12cfor the grass trimmer line15to come out from the right side of the grass trimmer head100.

As shown inFIG. 3, the grass trimmer line15includes a first line body151, a second line body152and a connecting portion153. The first line body151has a first free end151aand a first non-free end151b. The second line body152has a second free end152aand a second non-free end152b. The connecting portion153connects the first non-free end151bof the first line body151and the second non-free end152bof the second line body152, so that the first line body151and the second line body152are connected into the complete grass trimmer line15. The lengths of the first line body151and the second line body152are substantially equal. The first line body151has a first feature, and the second line body152has a second feature corresponding to the first feature, where the first feature is different from the second feature. The second feature corresponding to the first feature is that the second feature and the first feature respectively represent the same attribute of the second line body152and the first line body151. For example, in this example, the first feature is a first color, then the second feature corresponding to the first feature should also refer to a color, and in this example, the second feature is a second color correspondingly. In this way, the first line body151has the first color, the second line body152has the second color, and the second color is different from the first color.

In other examples, the first feature is a first pattern, the second feature is a second pattern, and the second pattern is different from the first pattern, that is, the first line body has the first pattern, and the second line body has the second pattern different from the first pattern. Alternatively, in other examples, the first feature is a first material, the second feature is a second material, and the second material is different from the first material, that is, the first line body has the first material, and the second line body has the second material different from the first material. Alternatively, in other examples, the first feature is a first shape, the second feature is a second shape, and the second shape is different from the first shape, that is, the first line body has the first shape, and the second line body has the second shape different from the first shape. Alternatively, in other examples, the first feature is a first radial dimension, the second feature is a second radial dimension, and the second radial dimension is different from the first radial dimension, that is, the first line body has the first radial dimension, and the second line body has the second radial dimension different from the first radial dimension. The radial dimension here mainly refers to that the first line body and the second line body are different in the shape of the radial section, and that the radial dimension refers to the radial length of the radial section. Generally speaking, for the first line body or the second line body, the shapes of the radial sections and the radial dimensions are the same everywhere, and of course, may also not be the same anywhere. The first line body and the second line body may be considered to be different as long as they have different shapes of radial sections at one place or different radial dimensions at one place.

Of course, it can be understood that in this example, the first feature refers to the first color and the second feature refers to the second color. At this time, the first line body151and the second line body152have different colors, and the first line body151and the second line body152can be made different, but at the same time, the first line body151and the second line body152may also have different shapes, materials, patterns, or radial dimensions. That is to say, when the first line body151and the second line body152are different in one feature attribute, it is not limited whether the first line body151and the second line body152are the same in other feature attributes.

As shown inFIG. 3, the first line body151and the second line body152are represented by different lines, which indicate that the first line body151and the second line body152have different colors. That is, the outer layers of the first line body151and the second line body152have different visual colors. In addition, in other examples, for the features of color, pattern, material, shape, and radial dimension, the first line body and the second line body may be distinguished from each other by one of the features, or may be distinguished from each other by a plurality of features at the same time.

When the difference between the lengths of the first line body151and the second line body152is less than or equal to the diameter of the grass trimmer head100, at this time, it is also considered that the length of the first line body151is substantially the same as the length of the second line body152. Generally speaking, the lengths of the first line body151and the second line body152are the same. During threading, as long as the rope bodies at the two ends of the grass trimmer head100is ensured to be different, the grass trimmer line15can be ensured to be substantially in the middle position relative to the grass trimmer head10, that is, the center point of the grass trimmer line15is substantially aligned with the center axis of the grass trimmer head100. In actual operation, the grass trimmer line15on two sides of the grass trimmer head100is allowed to have a certain length error, which has little influence on the effect of trimming grass. Preferably, the difference between the lengths of the first line body151and the second line body152is less than or equal to the diameter of the grass trimmer head100.

The first line body151and the second line body152are each a section of grass trimmer line, and the first line body151and the second line body152are connected together through the connecting portion153. Preferably, the connecting portion153connects the first line body151and the second line body152, so that the first line body151and the second line body152are in contact with and aligned in the radial direction. In this example, the connecting portion153specifically includes various adhesives.

A method for manufacturing the grass trimmer line15in a first example is introduced below.

(1) The first line body151and the second line body152with different features and having preset lengths are cut out. In this example, the features refer to the colors of the first line body151and the second line body152, that is, the first line body151and the second line body152have different colors. In other examples, the first line body and the second line body with different patterns and having preset lengths may also be cut out. Alternatively, in other examples, the first line body and the second line body with different materials and having preset lengths may also be cut out. Alternatively, in other examples, the first line body and the second line body having different shapes and having preset lengths may also be cut out. Alternatively, in other examples, the first line body and the second line body with different radial dimensions and having preset lengths may also be cut out.
(2) One end of the first line body151is aligned and in contact with one end of the second line body152, an adhesive is added to the joint and the first line body151and the second line body152are kept in close contact for a period of time until the adhesive is solidified and the first line body151and the second line body152are not disengaged in the natural state. The adhesive disposed between the first line body151and the second line body152forms the connecting portion153.

In this example, the first line body151and the second line body152have different colors. It can be understood that the first line body151and the second line body152may be made of different materials. In other examples, the first line body and the second line body may also be made of the same material, and then a material body having a color different from that of the second line body is disposed on the first line body. In other examples, the first line body and the second line body may also have different shapes, the first line body and the second line body may be manufactured into different shapes respectively; or the first line body and the second line body may have the same shape first, and then the first line body is made different from the second line body in shape by a special processing method.

In this example, the lengths of the first line body151and the second line body152are substantially the same. The difference between the lengths of the first line body151and the second line body152is less than or equal to the diameter of the grass trimmer head. When the difference between the lengths of the first line body151and the second line body152is less than 0.15 meters, it is considered that the lengths of the first line body151and the second line body152are substantially the same. In this example, the length of the first line body151is greater than or equal to 1 meter, and the length of the second line body152is greater than or equal to 1 meter. In this way, the length of the grass trimmer line15is long enough to meet the needs of the grass trimmer to work for a period of time. In this example, when the grass trimmer line15passes through the grass trimmer head100, the first line body151is located substantially on the left side of the grass trimmer head100, and the second line body152is located substantially on the right side of the grass trimmer head100. The portion located inside the grass trimmer head100is a portion of the first line body151or a portion of the second line body152, or a portion of the first line body151and a portion of the second line body152. In this example, the dimension of the connecting portion153is smaller than the diameter of the grass trimmer head100, and more specifically, the length of the connecting portion153is less than or equal to 0.05 meters. In other examples, the length of the connecting portion is less than or equal to 0.02 meters. In other examples, the length of the connecting portion is less than or equal to 0.01 meters.

It is known that in general, the length of the grass trimmer line sold in the market is generally more than 2 meters. For the grass trimmer line15in this example, the length is also greater than or equal to 2 meters. In this way, the length of the first line body151is generally greater than or equal to 1 meter, the length of the second line body152is also greater than or equal to 1 meter, and at this time, if the difference between the lengths of the first line body151and the second line body152is less than or equal to the diameter of the grass trimmer head, the difference between the lengths of the first line body151and the second line body152is so small compared to the length of the grass trimmer line15, so the difference can be ignored. Therefore, when the difference between the lengths of the first line body151and the second line body152is less than or equal to the diameter of the grass trimmer head100, it may also be considered that the lengths of the first line body151and the second line body152are substantially the same. It is known that the diameter of the grass trimmer head100is usually between 0.08 meters and 0.15 meters, so when the difference between the lengths of the first line body151and the second line body152is less than or equal to 0.15 meters, it may also be considered that the lengths of the first line body151and the second line body152are substantially the same.

In this example, the first line body151has the first feature from the first free end151ato the first non-free end151b, and the second line body152has the second feature from the second free end152ato the second non-free end152b. That is, the first line body151has the first color from the first free end151ato the first non-free end151b, and the second line body152has the second color from the second free end152ato the second non-free end152b. In this way, when the grass trimmer line15passes through the grass trimmer head100, the first line body151and the second line body152located on two sides of the grass trimmer head100have different colors, which is convenient for the user to observe.

FIG. 4shows a grass trimmer line25suitable for the grass trimmer ofFIG. 1according to a second example. The grass trimmer line25includes a first line body251, a second line body252, and a connecting portion253. The first line body251has a first free end251aand a first non-free end251b. The second line body252has a second free end252aand a second non-free end252b. The connecting portion253connects the first non-free end251bof the first line body251and the second non-free end252bof the second line body252, so that the first line body251and the second line body252are connected into the complete grass trimmer line25. The lengths of the first line body251and the second line body252are substantially equal. The first line body251and the second line body252have different features. In this example, the first line body251and the second line body252have different colors. In other examples, the first line body and the second line body may also have different patterns. Alternatively, in other examples, the first line body and the second line body may also have different materials. Alternatively, in other examples, the first line body and the second line body may also have different shapes. Alternatively, in other examples, the first line body and the second line body may also have different radial dimensions, and the radial dimension here mainly refers to that the first line body and the second line body are different in the shape of the radial section, and that the radial dimension refers to the radial length of the radial section. Generally speaking, for the first line body or the second line body, the shapes of the radial sections and the radial dimensions are the same everywhere, and of course, may also not be the same anywhere. The first line body and the second line body may be considered to be different as long as they have different shapes of radial sections at one place or different radial dimensions at one place.

The connecting portion253acts on the first line body251and the second line body252at the same time. The connecting portion253fixes the first line body251and the second line body252along a length direction of the first line body251and a length direction of the second line body251, respectively, so that the first line body251and the second line body252cannot move along the length direction of the first line body251and the length direction of the second line body251with respect to the connecting portion253under the action of a force smaller than a preset value, respectively. Specifically, the connecting portion253is an adhesive tape, a heat-shrinkable sleeve, or a winding tape, as long as the first line body251and the second line body252can be fixedly connected.

A method for manufacturing the grass trimmer line25in the second example is introduced below.

(1) The first line body251and the second line body252with different features and having preset lengths are cut out. In this example, the features refer to the colors of the first line body251and the second line body252, that is, the first line body251and the second line body252have different colors. In other examples, the first line body and the second line body with different patterns and having preset lengths may also be cut out. Alternatively, in other examples, the first line body and the second line body with different materials and having preset lengths may also be cut out. Alternatively, in other examples, the first line body and the second line body with different shapes and having preset lengths may also be cut out. Alternatively, in other examples, the first line body and the second line body with different radial dimensions and having preset lengths may also be cut out.
(2) One end of the first line body251is attached to one end of the second line body252, and a heat-shrinkable sleeve or an adhesive tape or a winding tape is wound around the joint of the first line body251and the second line body252. The heat-shrinkable sleeve or the adhesive tape or the winding tape is the connecting portion253that connects the first line body251and the second line body252.
(3) The heat-shrinkable sleeve is heated by using a heating device such as a heat gun or a heating furnace make the heat-shrinkable sleeve deformed and be attached to the grass trimmer line25.

In this example, the lengths of the first line body251and the second line body252are substantially the same. The difference between the lengths of the first line body251and the second line body252is less than or equal to the diameter of the grass trimmer head. When the difference between the lengths of the first line body251and the second line body252is less than 0.15 meters, it is considered that the lengths of the first line body251and the second line body252are substantially the same. In this example, the length of the first line body251is greater than or equal to 1 meter, and the length of the second line body252is greater than or equal to 1 meter. In this way, the length of the grass trimmer line25is long enough to meet the needs of the grass trimmer to work for a period of time. In this example, when the grass trimmer line25passes through the grass trimmer head100, the first line body251is located substantially on the left side of the grass trimmer head100, and the second line body252is located substantially on the right side of the grass trimmer head100, and the portion located inside the grass trimmer head100is a portion of the first line body251, or a portion of the second line body252, or a portion of the first line body251and a portion of the second line body252. In this example, the dimension of the connecting portion253is smaller than the diameter of the grass trimmer head100, and more specifically, the length of the connecting portion253is less than or equal to 0.05 meters. In other examples, the length of the connecting portion is less than or equal to 0.02 meters. In other examples, the length of the connecting portion is less than or equal to 0.01 meters.

It is known that in general, the length of the grass trimmer line sold in the market is generally more than 2 meters. For the grass trimmer line25in this example, the length is also greater than or equal to 2 meters. In this way, the length of the first line body251is generally greater than or equal to 1 meter, the length of the second line body252is also greater than or equal to 1 meter, and at this time, if the difference between the lengths of the first line body251and the second line body252is less than or equal to the diameter of the grass trimmer head, the difference between the lengths of the first line body251and the second line body252is so small compared to the length of the grass trimmer line25, so the difference can be ignored. Therefore, when the difference between the lengths of the first line body251and the second line body252is less than or equal to the diameter of the grass trimmer head100, it can also be considered that the lengths of the first line body251and the second line body252are substantially the same. It is known that the diameter of the grass trimmer head100is usually between 0.08 meters and 0.15 meters, so when the difference between the lengths of the first line body251and the second line body252is less than or equal to 0.15 meters, it can also be considered that the lengths of the first line body251and the second line body252are substantially the same.

In this example, the first line body251has the first feature from the first free end251ato the first non-free end251b, and the second line body252has the second feature from the second free end252ato the second non-free end252b. That is, the first line body251has the first color from the first free end251ato the first non-free end251b, and the second line body252has the second color from the second free end252ato the second non-free end252b. In this way, when the grass trimmer line25passes through the grass trimmer head100, the first line body251and the second line body252located on two sides of the grass trimmer head100have different colors, which is convenient for the user to observe.

FIG. 5shows a grass trimmer line35suitable for the grass trimmer ofFIG. 1according to a third example. The grass trimmer line35includes a first line body351, a second line body352, and a connecting portion353. The first line body351has a first free end351aand a first non-free end351b. The second line body352has a second free end352aand a second non-free end352b. The connecting portion353connects the first non-free end351bof the first line body351and the second non-free end352bof the second line body352, so that the first line body351and the second line body352are connected into the complete grass trimmer line35. The lengths of the first line body351and the second line body352are substantially equal. The first line body351and the second line body352have different features. In this example, the first line body351and the second line body352have different colors. In other examples, the first line body and the second line body may have different patterns. Alternatively, in other examples, the first line body and the second line body may also have different materials. Alternatively, in other examples, the first line body and the second line body may also have different shapes. Alternatively, in other examples, the first line body and the second line body may also have different radial dimensions, and the radial dimension here refers to that the first line body and the second line body are different in the shape of the radial section, and that the radial dimension refers to the radial length of the radial section. Generally speaking, for the first line body or the second line body, the shapes of the radial sections and the radial dimensions are the same everywhere, and of course, may also not be the same anywhere. The first line body and the second line body may be considered to be different as long as they have different shapes of radial sections at one place or different radial dimensions at one place.

The joint of the first line body351and the second line body352may be a physical joint, such as ultrasonic welding, and may be a chemical joint, such as hot melting. The connecting portion353includes a portion of the first line body351or a portion of the second line body352, that is, the connecting portion353may be a portion of the first line body351, or the connecting portion353may be a portion of the second line body352, or the connecting portion353includes a portion of the first line body351and a portion of the second line body352. The connecting portion353may have the same feature as the first line body351or the second line body352. For example, in this example, the connecting portion353may have the same color as the first line body351or the second line body352. It should be noted that due to the different processing techniques, the connecting portion353at the joint of the first line body351and the second line body352may also have different features from the first line body351or the second line body352. For example, the connecting portion353formed by hot melting one end of the first line body351or the second line body352may become black and thick due to heat, so that the connecting portion353has a different color and shape from the first line body351or the second line body352. At this time, it is still considered that the connecting portion353includes a portion of the first line body351or a portion of the second line body352. In other examples, the connecting portion353has a different shape or radial dimension from the first line body351or the second line body352, so that the user can more quickly find the midpoint of the grass trimmer line35, or for the user with color discrimination impairments and vision impairments, the particular shape or dimension of the connecting portion353is advantageous.

In this example, the lengths of the first line body351and the second line body352are substantially the same. The difference between the lengths of the first line body351and the second line body352is less than or equal to the diameter of the grass trimmer head. When the difference between the lengths of the first line body351and the second line body352is less than 0.15 meters, it is considered that the lengths of the first line body351and the second line body352are substantially the same. In this example, the length of the first line body351is greater than or equal to 1 meter, and the length of the second line body352is greater than or equal to 1 meter. In this way, the length of the grass trimmer line35is long enough to meet the needs of the grass trimmer to work for a period of time. In this example, when the grass trimmer line35passes through the grass trimmer head100, the first line body351is located substantially on the left side of the grass trimmer head100, and the second line body352is located substantially on the right side of the grass trimmer head100, and the portion located inside the grass trimmer head100is a portion of the first line body351, or a portion of the second line body352, or a portion of the first line body351and a portion of the second line body352. In this example, the dimension of the connecting portion353is smaller than the diameter of the grass trimmer head100, and more specifically, the length of the connecting portion353is less than or equal to 0.05 meters. In other examples, the length of the connecting portion is less than or equal to 0.02 meters. In other examples, the length of the connecting portion is less than or equal to 0.01 meters.

It is known that in general, the length of the grass trimmer line sold in the market is generally more than 2 meters. For the grass trimmer line35in this example, the length is also greater than or equal to 2 meters. In this way, the length of the first line body351is generally greater than or equal to 1 meter, the length of the second line body352is also greater than or equal to 1 meter, and at this time, if the difference between the lengths of the first line body351and the second line body352is less than or equal to the diameter of the grass trimmer head, the difference between the lengths of the first line body351and the second line body352is so small compared to the length of the grass trimmer line35, so the difference can be ignored. Therefore, when the difference between the lengths of the first line body351and the second line body352is less than or equal to the diameter of the grass trimmer head100, it can also be considered that the lengths of the first line body351and the second line body352are substantially the same. It is known that the diameter of the grass trimmer head100is usually between 0.08 meters and 0.15 meters, so when the difference between the lengths of the first line body351and the second line body352is less than or equal to 0.15 meters, it can also be considered that the lengths of the first line body351and the second line body352are substantially the same.

In this example, the first line body351has the first feature from the first free end351ato the first non-free end351b, and the second line body352has the second feature from the second free end352ato the second non-free end352b. That is, the first line body351has the first color from the first free end351ato the first non-free end351b, and the second line body352has the second color from the second free end352ato the second non-free end352b. In this way, when the grass trimmer line35passes through the grass trimmer head100, the first line body351and the second line body352located on two sides of the grass trimmer head100have different colors, which is convenient for the user to observe.

A method for manufacturing the grass trimmer line35in the third example is introduced below.

(1) The first line body351and the second line body352with different features and having preset lengths are cut out. In this example, the features refer to the colors of the first line body351and the second line body352, that is, the first line body351and the second line body352have different colors. In other examples, the first line body and the second line body with different patterns and having preset lengths may also be cut out. Alternatively, in other examples, the first line body and the second line body with different materials and having preset lengths may also be cut out. Alternatively, in other examples, the first line body and the second line body with different shapes and having preset lengths may also be cut out. Alternatively, in other examples, the first line body and the second line body with different radial dimensions and having preset lengths may also be cut out.
(2) One end of the first line body351is aligned and in contact with one end of the second line body352, and then heating is performed for melting and fusion.
(3) The fusion point is cooled to be solidified and the first line body351and the second line body352are not disengaged in the natural state.

In this example, the first line body351and the second line body352have different colors. It can be understood that the first line body351and the second line body352may be made of different materials. In other examples, the first line body and the second line body may also be made of the same material, and then a material body having a color different from that of the second line body is disposed on the first line body. In other examples, the first line body and the second line body may also have different shapes, the first line body and the second line body may be manufactured into different shapes respectively; or the first line body and the second line body may have the same shape first, and then the first line body is made different from the second line body in shape by a special processing method.

FIG. 6shows a grass trimmer line45suitable for the grass trimmer ofFIG. 1according to a fourth example. The grass trimmer line45includes a first line body451and a second line body452. The first line body451has a first feature, and the second line body452has at least a first portion and a second portion in a radial direction. The first portion has a second feature, and the second portion has a third feature. The first feature may be the same as the third feature, and the second feature is different from the first feature. In this way, the first line body451and the second line body452may also have different features. Specifically, for example, in this example, the first line body451has a first color, the first portion of the second line body452also has the first color, and the second portion of the second line body452has a second color different from the first color. The lengths of the first line body451and the second line body452are substantially equal. In this example, the first line body451is a single type of grass trimmer line, and the second line body452is a whole of two types of grass trimmer lines intertwined with each other through weaving. Of course, in an optional example, the connecting mode of the two types of grass trimmer lines45that form the second line body452may also be bonding, which is not limited herein.

The first line body451and the second line body452are connected at a place where the second portion of the second line body452is combined with the first line body451. In this way, it can be considered that the place where the second portion is combined with the first line body451is a connecting portion453for connecting the first line body451and the second line body452. At this time, the connecting portion453includes a part of the second portion.

In fact, it can be understood that in this example, the second line body452includes the first portion and the second portion, and the combination of the first portion and the second portion has made the second line body452different from the first line body451in shape.

A method for manufacturing the grass trimmer line45in the fourth example is introduced below.

(1) Two types of rope bodies with different features are connected together through a physical method to form a complete rope body. The physical method may be a weaving method, and the different features may be different colors.

(2) The complete rope body is divided into two sections at the midpoint or the preset point of the complete rope body, and the rope body with one of the features of one section is peeled off.

Another method for manufacturing the grass trimmer line45in the fourth example is introduced below.

(1) A rope body with the first future is taken out. The rope body having the first feature refers to that the rope body has the first color.

(2) The complete rope body is divided into two sections at the midpoint or the preset point of the complete rope body, and an additional rope body with the second feature is wound around one section of the rope body. The second feature is different from the first feature. The additional rope body having the second feature refers to that the additional rope body has the second color.

In this example, the lengths of the first line body451and the second line body452are substantially the same. The difference between the lengths of the first line body451and the second line body452is less than or equal to the diameter of the grass trimmer head. When the difference between the lengths of the first line body451and the second line body452is less than 0.15 meters, it is considered that the lengths of the first line body451and the second line body452are substantially the same. In this example, the length of the first line body451is greater than or equal to 1 meter, and the length of the second line body452is greater than or equal to 1 meter. In this way, the length of the grass trimmer line45is long enough to meet the needs of the grass trimmer to work for a period of time. In this example, when the grass trimmer line45passes through the grass trimmer head100, the first line body451is located substantially on the left side of the grass trimmer head100, and the second line body452is located substantially on the right side of the grass trimmer head100, and the portion located inside the grass trimmer head100is a portion of the first line body451, or a portion of the second line body452, or a portion of the first line body451and a portion of the second line body452. In this example, the dimension of the connecting portion453is smaller than the diameter of the grass trimmer head100, and more specifically, the length of the connecting portion453is less than or equal to 0.05 meters. In other examples, the length of the connecting portion is less than or equal to 0.02 meters. In other examples, the length of the connecting portion is less than or equal to 0.01 meters.

It is known that in general, the length of the grass trimmer line sold in the market is generally more than 2 meters. For the grass trimmer line45in this example, the length is also greater than or equal to 2 meters. In this way, the length of the first line body451is generally greater than or equal to 1 meter, the length of the second line body452is also greater than or equal to 1 meter, and at this time, if the difference between the lengths of the first line body451and the second line body452is less than or equal to the diameter of the grass trimmer head, the difference between the lengths of the first line body451and the second line body452is so small compared to the length of the grass trimmer line45, so the difference can be ignored. Therefore, when the difference between the lengths of the first line body451and the second line body452is less than or equal to the diameter of the grass trimmer head100, it can also be considered that the lengths of the first line body451and the second line body452are substantially the same. It is known that the diameter of the grass trimmer head100is usually between 0.08 meters and 0.15 meters, so when the difference between the lengths of the first line body451and the second line body452is less than or equal to 0.15 meters, it can also be considered that the lengths of the first line body451and the second line body452are substantially the same.

In this example, the first line body451has the first feature from one end to the connecting point with the second line body452, and the second line body452has the second feature from one end to the connecting point with the first line body451. That is, the first line body451has the first color, and the second line body452has the second color. In this way, when the grass trimmer line45passes through the grass trimmer head100, the first line body451and the second line body452located on two sides of the grass trimmer head100have different colors, which is convenient for the user to observe.

FIG. 7shows a grass trimmer line55suitable for the grass trimmer ofFIG. 1according to a fifth example. The difference between this example and the fourth example is that the first portion of the second line body552is wrapped around the outside of the second portion by means of wrapping. That is, the materials forming the second line body552are arranged in layers in the radial direction. Specifically, in this example, the first line body551is made of a material in the radial direction, the second line body552is made of double layers of materials in the radial direction, the two materials have different colors or materials or patterns, and the midpoint of the grass trimmer line55is found by identifying the difference between the two materials.

The first line body551and the second line body552are connected at a place where the first portion of the second line body552is combined with the first line body551. In this way, it can be considered that the place where the first portion is combined with the first line body551is a connecting portion553for connecting the first line body551and the second line body552. At this time, the connecting portion553includes a part of the first portion.

In this example, the second line body552includes the first portion and the second portion. When the first portion and the second portion are combined, the radial dimension of the second line body552is different from that of the first line body551.

A first method for manufacturing the grass trimmer line55in the fifth example is introduced below.

(1) A rope body with the first feature is taken out. The rope body having the first feature may refer to that the rope body has the first color.

(2) A material layer with the second feature is wrapped around the surface of the rope body to form a complete rope body. The second feature is different from the first feature. The material layer having the second future may refer to that the material layer has a second color.
(3) The complete rope body is divided into two sections at the midpoint or the preset point of the complete rope body, and the material layer of one section is peeled off.

A second method for manufacturing the grass trimmer line55in the fifth example is introduced below.

(1) A rope body with the first feature is taken out. The rope body having the first feature refers to that the rope body has the first color.

(2) The complete rope body is divided into two sections at the midpoint or the preset point of the complete rope body, and an additional rope body with the second feature is wrapped around one section of the rope body. The second feature is different from the first feature. The additional rope body having the second feature refers to that the additional rope body has the second color.

In this example, the lengths of the first line body551and the second line body552are substantially the same. The difference between the lengths of the first line body551and the second line body552is less than or equal to the diameter of the grass trimmer head. When the difference between the lengths of the first line body551and the second line body552is less than 0.15 meters, it is considered that the lengths of the first line body551and the second line body552are substantially the same. In this example, the length of the first line body551is greater than or equal to 1 meter, and the length of the second line body552is greater than or equal to 1 meter. In this way, the length of the grass trimmer line55is long enough to meet the needs of the grass trimmer to work for a period of time. In this example, when the grass trimmer line55passes through the grass trimmer head100, the first line body551is located substantially on the left side of the grass trimmer head100, and the second line body552is located substantially on the right side of the grass trimmer head100, and the portion located inside the grass trimmer head100is a portion of the first line body551, or a portion of the second line body552, or a portion of the first line body551and a portion of the second line body552. In this example, the dimension of the connecting portion553is smaller than the diameter of the grass trimmer head100, and more specifically, the length of the connecting portion553is less than or equal to 0.05 meters. In other examples, the length of the connecting portion is less than or equal to 0.02 meters. In other examples, the length of the connecting portion is less than or equal to 0.01 meters.

It is known that in general the length of the grass trimmer line sold in the market is generally more than 2 meters. For the grass trimmer line55in this example, the length is also greater than or equal to 2 meters. In this way, the length of the first line body551is generally greater than or equal to 1 meter, the length of the second line body552is also greater than or equal to 1 meter, and at this time, if the difference between the lengths of the first line body551and the second line body552is less than or equal to the diameter of the grass trimmer head, the difference between the lengths of the first line body551and the second line body552is so small compared to the length of the grass trimmer line55, so the difference can be ignored. Therefore, when the difference between the lengths of the first line body551and the second line body552is less than or equal to the diameter of the grass trimmer head100, it can also be considered that the lengths of the first line body551and the second line body552are substantially the same. It is known that the diameter of the grass trimmer head100is usually between 0.08 meters and 0.15 meters, so when the difference between the lengths of the first line body551and the second line body552is less than or equal to 0.15 meters, it can also be considered that the lengths of the first line body551and the second line body552are substantially the same.

In this example, the first line body551has the first feature from an end to the connecting point with the second line body552, and the second line body552has the second feature from an end to the connecting point with the first line body551. That is, the first line body551has the first color, and the second line body552has the second color. In this way, when the grass trimmer line55passes through the grass trimmer head100, the first line body551and the second line body552located on two sides of the grass trimmer head100have different colors, which is convenient for the user to observe.

The basic principles, main features and advantages of the present disclosure have been shown and described above. It can be understood by any person skilled in the art that the foregoing examples are not intended to limit the present disclosure in any form. Technical solutions obtained by equivalent substitution or equivalent transformation are within the scope of the present disclosure.