Handheld grass trimmer

Abstract

The utility model discloses a handheld grass trimmer which comprises a handle, a connecting pipe and a machine head component, one end of the connecting pipe extends into the handle and is movably connected with the handle, the other end of the connecting pipe is fixedly connected with the machine head component, the handle comprises a handheld body and a locking sleeve, a sliding groove is formed in the connecting pipe, and the locking sleeve is fixedly connected with the handle. The handle further comprises a limiting ring and a lock catch, the limiting ring is only movably installed in the handheld body and can only rotate relative to the handheld body, the connecting pipe penetrates through the limiting ring, the sliding protrusion is embedded in the sliding groove, and the lock catch is movably installed on the handheld body in a sliding mode. The handpiece component of the handheld grass trimmer not only can stretch out and draw back relative to the handle, but also can rotate relative to the handle, the posture condition for trimming the edge of a lawn is obtained only through the rotating operation of the handpiece component, and the handle continues to maintain the original posture and provides an appropriate and stable handheld structure.

Description

Technical Field

[0001] The utility model relates to a handheld gardening tool, in particular to a handheld grass trimmer. Background Art

[0002] As a commonly used garden tool, handheld mowers play an important role in gardening work environments. Because the mowing rope on the handheld mower only rotates in a single circular direction, the operation mode of the handheld mower mainly serves the plane working environment, generally based on the horizontal plane. However, in long-term labor practice, people have found that when it is necessary to trim the edge of the lawn, it is only necessary to adjust the spatial posture of the handheld mower so that the rotation direction of the mowing rope is in the vertical plane, and then cut the leaves that cross the boundary along the predetermined lawn edge to complete the trimming operation of the lawn edge. The handheld structure of the handheld mower in the prior art serves the needs of horizontal plane operations. Once the handheld mower is flipped to change its spatial posture, the original handheld structure will no longer be suitable for the new operating situation, which brings about the problem of no adapted handheld area or handheld structure. Obviously, the overall posture change of the handheld mower to meet the requirements of trimming the lawn edge will bring great inconvenience to the operator. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to have a suitable hand-held structure when trimming the edge of a lawn, thereby obtaining a hand-held lawn mower.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: the handheld grass trimmer comprises a handle, a connecting tube, and a head component, one end of the connecting tube extends into the handle and is movably connected to the handle, the other end of the connecting tube is fixedly connected to the head component, the handle comprises a handheld body and a locking sleeve, the connecting tube passes through the locking sleeve, the locking sleeve and the handheld body are connected by threads, a slide groove is provided on the connecting tube, the extension direction of the slide groove is parallel to the center line of the connecting tube, the handle also comprises a limiting ring and a locking buckle, a sliding protrusion corresponding to the slide groove is provided inside the limiting ring, a limiting groove is provided outside the limiting ring, and the limiting groove It includes a transition groove and a positioning groove, the transition groove is distributed in an arc shape around the center line of the limiting ring, the positioning groove extends in a direction parallel to the center line of the limiting ring, the limiting groove includes two positioning grooves, the positioning grooves are distributed at both ends of the transition groove, and the positioning grooves are connected to the transition groove, the limiting ring is only movably installed inside the handheld body and the limiting ring can only rotate relative to the handheld body, the connecting pipe passes through the limiting ring, the sliding protrusion is embedded in the sliding groove, the locking buckle is movably installed on the handheld body in a sliding manner, and a pressure-bearing part and a limiting part are provided on the locking buckle, the pressure-bearing part is exposed on the surface of the handheld body, and the limiting part is embedded in the limiting groove.

[0005] The above technical solution is obtained based on the design idea of ​​only adjusting the spatial posture of the head component and not changing the spatial posture of the handle. The distance between the handle and the head component can be adjusted, and the angle between them around the center line of the connecting pipe can also be adjusted. Therefore, the connection structure between the handle and the head component in this technical solution can support two-dimensional adjustment operations. When the head component is adapted to the operation of mowing the edge of the lawn, the handle still maintains its original spatial posture, thereby providing the operator with a suitable and stable hand-held structure.

[0006] The limiting ring is the key feature of the above technical solution. It is the transition connection structure between the handheld body and the connecting tube. When the locking sleeve does not clamp the connecting tube, the connecting tube can slide linearly in the limiting ring, and the limiting ring will not be driven by the connecting tube; because the center lines of the two coincide after the connecting tube passes through the limiting ring, and the sliding protrusion inside the limiting ring is embedded in the slide groove, when the connecting tube rotates, it can randomly drive the limiting ring to rotate. The premise at this time is that the limiting part of the lock is in the transition groove, not the positioning groove.

[0007] The posture adjustment of the head component is completed after the whole part rotates at a certain angle. In actual working conditions, the rotation angle is mostly 180 degrees. In order to cater to this use case, the angle of the transition groove relative to the center line of the limit ring is 180 degrees. In this way, the maximum angle of the limit ring rotation is limited, which is convenient for operators. Of course, the angle of the transition groove can be set to an adaptive angle according to the working conditions. This selective design can meet most operating requirements.

[0008] In order to automatically maintain the spatial posture of the head component relative to the handle, the handle further includes a return spring, which is mounted on the handheld body, and one end of which is connected to the lock buckle. The return spring pushes the lock buckle, causing the lock buckle to always have a tendency to move into the positioning groove. As long as the lock buckle is opposite to the positioning groove, the lock buckle can slide into the positioning groove under the action of the return spring.

[0009] The utility model adopts the above technical solution: the head part of the handheld mower can not only be extended and retracted relative to the handle, but also can be rotated relative to the handle, and the posture condition for mowing the edge of the lawn can be obtained only by rotating the head part, while the handle continues to maintain the original posture and provides a suitable and stable hand-held structure. Therefore, the handheld mower is simple to operate and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0011] Figure 1 This is a three-dimensional diagram of a handheld grass trimmer of the utility model;

[0012] Figure 2 This is a schematic diagram of the assembly of a limit ring and a lock buckle of a handheld grass trimmer of the utility model;

[0013] Figure 3 It is a schematic diagram of a state in which a connecting pipe of a handheld grass trimmer drives a limiting ring to rotate. DETAILED DESCRIPTION

[0014] like Figure 1 , 2 As shown in Figure 3, the handheld grass trimmer includes a handle 1, a connecting pipe 2, and a head part 3. The handle 1 is used to provide a hand-held structure for the operator, and is combined with a control circuit and a battery; the head part 3 is used to set a grass trimming rope for cutting weeds and a driving structure for driving the grass trimming rope to rotate; the connecting pipe 2 is used to connect the handle 1 and the head part 3 together.

[0015] The handle 1 includes a handheld body 4, a locking sleeve 5, a limiting ring 6, a lock buckle 7, and a reset spring 11. The handheld body 4 and the locking sleeve 5 are both made of plastic, and the handheld body 4 is a shell structure; the locking sleeve 5 and the handheld body 4 are connected by threads. The limiting ring 6 is movably installed inside the handheld body 4, and it can only move in a self-rotating manner inside the handheld body 4; the limiting ring 6 is an annular structure as a whole. The lock buckle 7 is installed on the handheld body 4 in a sliding manner, and the lock buckle 7 is provided with a pressure-bearing part and a limiting part 12. The pressure-bearing part is used to receive the power of the operator's manual operation, and the limiting part 12 is used to connect with the limiting ring 6. The pressure-bearing part is exposed on the surface of the handheld body 4, and the limiting part 12 is located inside the handheld body 4.

[0016] The connecting tube 2 is a straight round tube structure as a whole, and a slide groove 8 is provided on one side thereof, and the extending direction of the slide groove 8 is parallel to the center line of the connecting tube 2. One end of the connecting tube 2 extends into the inside of the handheld body 4, and the connecting tube 2 passes through the limit ring 6 and the locking sleeve 5. The part of the handheld body 4 corresponding to the locking sleeve 5 can be deformed to the same central position after being connected with the locking sleeve 5, so after the connecting tube 2 enters the inside of the handheld body 4 and the locking sleeve 5 is tightened on the handheld body 4, the connecting tube 2 can be firmly fixed on the handheld body 4. Conversely, after the locking sleeve 5 is loosened, the connecting tube 2 can be removed from the handheld body 4, so that the connecting tube 2 is movably connected to the handle 1. The other end of the connecting tube 2 is fixedly connected to the head component 3.

[0017] A sliding protrusion 13 corresponding to the slide groove 8 is provided inside the limiting ring 6; a limiting groove is provided outside the limiting ring 6, and the limiting groove includes a transition groove 9 and two positioning grooves 10. The transition groove 9 is distributed in an arc shape around the center line of the limiting ring 6. The angle of the transition groove 9 relative to the center line of the limiting ring 6 is one hundred and eighty degrees. The positioning groove 10 extends in a direction parallel to the center line of the limiting ring 6. The positioning grooves 10 are distributed at both ends of the transition groove 9, and the positioning grooves 10 are connected to the transition groove 9.

[0018] A cavity corresponding to the limiting ring 6 is provided inside the handheld body 4. When the limiting ring 6 is embedded in the cavity, the limiting ring 6 is entirely located inside the handheld body 4. The limiting ring 6 is movably installed inside the handheld body 4 and can only rotate relative to the handheld body 4, and the limiting ring 6 cannot move along the center line of the limiting ring 6. After the connecting tube 2 is combined with the limiting ring 6, the sliding protrusion 13 is embedded in the slide groove 8, and the center line of the connecting tube 2 coincides with the center line of the limiting ring 6; the sliding direction of the lock buckle 7 on the handheld body 4 is parallel to the center line of the limiting ring 6, and the limiting part 12 is embedded in the limiting groove, and its range of motion intersects with the limiting groove. The reset spring 11 is installed on the handheld body 4. Since one end of the reset spring 11 is connected to the lock buckle 7, there is always a tendency to push the lock buckle 7 toward the embedded positioning groove 10.

[0019] In the initial state, the connecting tube 2 is firmly fixed on the handle 1, and the limiting part 12 of the lock buckle 7 is embedded in one of the limiting grooves. The operator can use the handheld grass trimmer by holding the handheld body 4 tightly. When the head component 3 needs to be turned, the locking sleeve 5 is first loosened to allow the locking sleeve 5 to be separated from the handheld body 4. At this time, the connecting tube 2 is no longer passively connected to the handheld body 4, and the connecting tube 2 and the handheld body 4 have the freedom of relative movement. The connecting tube 2 can move along its center line and obtain a telescopic effect as a whole. Push the lock buckle 7 to force the limiting part 12 to move in the direction of separating from the limiting groove and enter the transition groove 9, and the connecting tube 2 and the handheld body 4 further obtain the freedom of relative movement. Then, the connecting tube 2 is rotated. Since the sliding protrusion 13 is embedded in the slide groove 8, when the connecting tube 2 moves along its center line, the sliding protrusion 13 will not move with the connecting tube 2, and when the connecting tube 2 rotates, the sliding protrusion 13 is pushed by the connecting tube 2, so that the limiting ring 6 rotates with it. The relative position of the lock buckle 7 on the handheld main body 4 remains unchanged. After the limiting part 12 enters the transition groove 9, the connecting tube 2 is only allowed to rotate 180 degrees, that is, the maximum rotation angle of the connecting tube 2 is the angle of the transition groove 9. After the limiting ring 6 rotates with the connecting tube 2, the limiting part 12 of the lock buckle 7 passes through the transition groove 9 and aligns with another limiting groove. After the operator releases the lock buckle 7, the reset spring 11 pushes the lock buckle 7 until the limiting part 12 enters another limiting groove, and then the locking sleeve 5 is tightened on the handheld main body 4. In this way, the operation of rotating the head component 3 is completed.

Claims

1. A handheld grass trimmer, comprising a handle (1), a connecting tube (2), and a head component (3), wherein one end of the connecting tube (2) extends into the handle (1) and the connecting tube (2) is movably connected to the handle (1), and the other end of the connecting tube (2) is fixedly connected to the head component (3), the handle (1) comprises a handheld body (4) and a locking sleeve (5), the connecting tube (2) passes through the locking sleeve (5), and the locking sleeve (5) is connected to the handheld body (4) by a thread, characterized in that: The connecting tube (2) is provided with a slide groove (8), the extension direction of the slide groove (8) is parallel to the center line of the connecting tube (2), the handle (1) also includes a limiting ring (6) and a lock buckle (7), the limiting ring (6) is provided with a sliding protrusion (13) corresponding to the slide groove (8), the limiting ring (6) is provided with a limiting groove outside, the limiting groove includes a transition groove (9) and a positioning groove (10), the transition groove (9) is distributed in an arc shape around the center line of the limiting ring (6), the positioning groove (10) extends in a direction parallel to the center line of the limiting ring (6), the limiting groove includes two positioning grooves (10), the The positioning grooves (10) are distributed at both ends of the transition groove (9), and the positioning grooves (10) are connected to the transition groove (9). The limiting ring (6) is only movably mounted inside the handheld body (4) and the limiting ring (6) can only rotate relative to the handheld body (4). The connecting pipe (2) passes through the limiting ring (6), and the sliding protrusion (13) is embedded in the sliding groove (8). The lock buckle (7) is movably mounted on the handheld body (4) in a sliding manner. The lock buckle (7) is provided with a pressure-bearing portion and a limiting portion (12), the pressure-bearing portion is exposed on the surface of the handheld body (4), and the limiting portion (12) is embedded in the limiting groove.

2. The handheld grass trimmer according to claim 1, characterized in that: The angle of the transition groove (9) relative to the center line of the limiting ring (6) is one hundred and eighty degrees.

3. The handheld grass trimmer according to claim 1, characterized in that: The handle (1) further comprises a return spring (11), wherein the return spring (11) is mounted on the handheld body (4), and one end of the return spring (11) is connected to the lock buckle (7).

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