JP7744671B2 - Scatter protection cover and brush cutter - Google Patents

Description

This disclosure relates to a splash guard cover and a brush cutter equipped with the cover.

Scatter protection covers for brush cutters are well known (see Patent Document 1, etc.). By attaching this type of scatter protection cover to the main shaft of a brush cutter, it is possible to prevent grass clippings and pebbles (hereinafter referred to as "grass clippings, etc.") from scattering toward the user.

Utility Model Registration No. 3187665

The conventional scattering protection covers described above have difficulty effectively preventing grass clippings from scattering toward the user in situations where grass clippings are scattered over a wide area. In particular, in recent years, linear cutters are often used for mowing, and in such cases, grass clippings are more likely to scatter over a wide area.

The purpose of this disclosure is to effectively prevent grass clippings and other debris from flying toward the user.

The scattering protection cover according to one aspect of the present disclosure is a scattering protection cover that is attached to the main shaft of a brush cutter, and includes an attachment part that is attached to the main shaft, and a cover main body that is attached to the main shaft via the attachment part. The cover main body has a receiving surface for receiving grass clippings, and the receiving surface is mainly composed of a concave curved surface that is recessed toward the rear.

A brush cutter according to one aspect of the present disclosure includes the splash guard cover and the main shaft to which the splash guard cover is attached.

This disclosure has the effect of effectively preventing grass clippings and the like from flying toward the user.

FIG. 1 is a perspective view of a splash guard cover according to one embodiment. FIG. 2 is a top view of the above-mentioned splash guard cover. FIG. 3 is a cross-sectional view taken along line AA in FIG. FIG. 4 is a cross-sectional view taken along line BB in FIG. FIG. 5 is a perspective view of a main part of a cover body provided in the above-mentioned splash guard cover. FIG. 6 is a perspective view of a connector included in a mounting portion of the above-mentioned splash guard cover. FIG. 7 is a side view of the connector. 8A and 8B are explanatory diagrams showing the operation of the mounting portion. FIG. 9 is a perspective view showing the above-mentioned splash protection cover attached to a brush cutter in use.

1. Embodiment 1-1. Overall Structure FIG. 9 shows a state in which a splash guard cover 8 according to one embodiment is attached to a main shaft 92 of a brush cutter 9.

The brush cutter 9 comprises a hollow main shaft 92, a plurality of linear cutters 94 attached to the first axial end of the main shaft 92, an engine 96 mounted on the second axial end of the main shaft 92, and a handle 98 connected to the middle of the main shaft 92 in the axial direction. The first axial end of the main shaft 92 is, in other words, the front end of the main shaft 92, and the second axial end of the main shaft 92 is, in other words, the rear end of the main shaft 92. The front-to-rear direction here is based on the user when using the brush cutter 9.

A rotating shaft (not shown) is inserted inside the main shaft 92. When the rotating shaft is rotated by the engine 96, this rotation is transmitted to rotate and drive the multiple linear cutters 94. Each linear cutter 94 is made of a synthetic resin such as nylon. Instead of, or in addition to, these linear cutters 94, a rotary blade such as a chip saw can be attached to the first axial end of the main shaft 92.

A shoulder strap 97 is also attached to the main shaft 92, and the user can place the shoulder strap 97 over their shoulder, hold the handle 98, and swing the brush cutter 9 left and right to cut grass.

The scattering protection cover 8 is attached to part of the axial direction of the main shaft 92. The scattering protection cover 8 is mainly formed by an attachment portion 1, a cover main body portion 2, and an intermediate portion 3. The attachment portion 1 is a portion that is detachably attached to the main shaft 92, and the cover main body portion 2 is a portion for receiving grass clippings, etc. The intermediate portion 3 is a portion that connects the attachment portion 1 and the cover main body portion 2. In other words, the cover main body portion 2 is detachably attached to the main shaft 92 via the intermediate portion 3 and the attachment portion 1.

The following describes each component of the splash guard cover 8 in more detail.

1-2. Mounting Part The mounting part 1 has a connector 12, a lever 14, a hook 16, and a plurality of hooking parts 18.

As shown in Figures 1, 6, etc., the connector 12 is a C-shaped member with a smoothly concavely curved inner circumferential surface 125. The connector 12 is made of, for example, a synthetic resin and has elasticity. The inner circumferential surface 125 of the connector 12 is a concavely curved surface that is curved in an arc. The inner diameter of the inner circumferential surface 125 of the connector 12 can be changed by deforming the connector 12.

In one embodiment of the splash guard cover 8, the inner peripheral surface 125 of the connector 12 presses against a portion of the outer peripheral surface 925 (see Figure 9) of the main shaft 92 in the axial direction, clamping the portion of the outer peripheral surface 925. This allows the connector 12 to be attached to the main shaft 92.

The C-shaped connector 12 has a first end 121 and a second end 122 located on opposite sides. Both the first end 121 and the second end 122 are designed to protrude upward when in use, and when no external force is applied, the first end 121 and the second end 122 are inclined toward each other. A gap 128 is provided between the first end 121 and the second end 122, separating them.

The first end 121 is provided with a protruding portion 123 for connecting the lever 14. The protruding portion 123 protrudes away from the gap 128, and a recessed connecting portion 124 for connecting the lever 14 is formed at its tip.

The second end 122 has a protruding portion 126. The protruding portion 126 of the second end 122 has multiple hooks 18 formed thereon. The protruding direction of the protruding portion 126 of the second end 122 is the same as the protruding direction of the protruding portion 123 of the first end 121. Like the protruding portion 123 of the first end 121, the protruding portion 126 of the second end 122 protrudes away from the gap 128. The two protruding portions 123, 126, which are spaced apart, are parallel to each other. When in use, the two protruding portions 123, 126 protrude upward. The term "parallel" used in this document is not limited to "parallel" in the strict sense, but also includes the case of being approximately parallel.

As shown in Figures 1, 8, etc., the lever 14 is a member made of, for example, synthetic resin, and has a shape in which a short side 141 and a long side 142 intersect in an L-shape. A connecting portion 144 is formed at the protruding end of the short side 141 for rotatably connecting to the connecting portion 124 of the connector 12. The connecting portions 124, 144 rotatably fit together, so that the lever 14 is rotatably connected to the protruding portion 126 of the connector 12, and therefore to the first end portion 121. The lever 14 is displaceable relative to the connector 12.

The long side 142 is the part that the user uses to operate the lever, and its tip is curved to make it easier for the user to hook their finger. The tip of the long side 142 curves in the opposite direction to the position of the short side 141 relative to the long side 142.

The hook 16 is rotatably connected to a portion 146 of the lever 14 that is remote from the connecting portion 144. In one embodiment of the splash guard cover 8, the portion 146 to which the hook 16 is connected is the intersection of the short side portion 141 and the long side portion 142. The hook 16 is composed of a wire bent into a trapezoidal shape, and specifically includes a straight portion 161 that can be engaged with the hook portion 18, and a pair of extension portions 162 that extend from both ends of this portion 161 (see Figure 2). The pair of extension portions 162 are inclined so that the distance between them increases the further they are from the straight portion 161. The tip end (not shown) of each extension portion 162 is rotatably connected to the portion 146 of the lever 14. In one embodiment of the splash guard cover 8, the hook 16 is attached to the connector 12 via the lever 14.

As shown in Figure 8, the multiple hook portions 18 are composed of multiple grooves 181, 182, and 183. In one embodiment of the splash guard cover 8, the multiple grooves 181, 182, and 183 are three grooves 181, 182, and 183 positioned side by side and parallel to each other. The three grooves 181, 182, and 183 are arranged so that the tip portion 161 of the hook 16 can be selectively hooked onto one of them.

The opening direction of the three grooves 181, 182, and 183 is opposite the direction in which the first end 121 is positioned relative to the second end 122 of the connector 12. In other words, the opening direction is opposite the direction in which the protruding portion 123 to which the lever 14 is connected is positioned relative to the protruding portion 126 in which the three grooves 181, 182, and 183 are formed.

The three grooves 181, 182, and 183 are: first groove 181, which is used when the main shaft 92 has a relatively small diameter (for example, when the diameter is 24 mm); second groove 182, which is used when the main shaft 92 has a standard diameter (for example, when the diameter is 25 mm); and third groove 183, which is used when the main shaft 92 has a relatively large diameter (for example, when the diameter is 26 mm).

The distances between the groove bottoms of the first groove 181, second groove 182, and third groove 183 and the connecting portion 124 included in the connector 12 are different from one another. Specifically, the distance between the groove bottom of the first groove 181 and the connecting portion 124 is set to be greater than the distance between the groove bottom of the second groove 182 and the connecting portion 124. The distance between the groove bottom of the second groove 182 and the connecting portion 124 is set to be greater than the distance between the groove bottom of the third groove 183 and the connecting portion 124.

In one embodiment of the shatterproof cover 8, the inner diameter of the attachment portion 1 (i.e., the inner diameter of the elastic connector 12) is configured to change in multiple stages depending on whether the hook 16 of the attachment portion 1 is hooked into the first, second, or third groove 181, 182, or 183. When the hook 16 of the attachment portion 1 is hooked into the first groove 181, the geometric relationship between the connector 12, lever 14, and hook 16 causes the connector 12 to undergo a relatively large elastic deformation so as to clamp a main shaft 92 with a relatively small diameter (e.g., 24 mm diameter). When the hook 16 is hooked into the second groove 182, the connector 12 undergoes an elastic deformation so as to clamp a main shaft 92 with a standard diameter (e.g., 25 mm diameter). When the hook 16 is hooked into the third groove 183, the connector 12 undergoes a relatively small elastic deformation so as to clamp a main shaft 92 with a relatively large diameter (e.g., 26 mm diameter).

1 and other figures, the cover main body 2 is made of, for example, synthetic resin and has a shape similar to the upper half of a bowl-shaped member split into upper and lower halves. The cover main body 2 is provided with a receiving surface 21 for receiving grass clippings and preventing them from scattering. The receiving surface 21 faces the front end of the main shaft 92 when in use; in other words, it faces the side of the cover main body 2 opposite to the side where the user is positioned when in use.

The receiving surface 21 includes a concave surface 215 that forms the main body of the receiving surface 21, and a clamping surface 217 that forms the peripheral edge of the receiving surface 21. The concave surface 215 and the clamping surface 217 are directly continuous, but other surfaces may be interposed between the concave surface 215 and the clamping surface 217.

The concave surface 215 is a surface that is concave toward the rear (i.e., toward the user when in use). As shown in Figure 3, the longitudinal cross section of the concave surface 215 is an arc-shaped cross section that is concave toward the rear. Also, as shown in Figure 4, the transverse cross section of the concave surface 215 is an arc-shaped cross section that is concave toward the rear. Here, "rear" refers to the user when in use.

The radius of curvature of the longitudinal cross section of concave curved surface 215 is set to be larger than the radius of curvature of the transverse cross section of concave curved surface 215. It is not required that the entire concave curved surface 215 be a concave curved surface in the strict sense; for example, it may include a flat or convex surface in part, as long as it is a concave curved surface overall.

The concave surface 215 has multiple recesses 23 spaced apart from one another to more effectively prevent grass clippings and other debris from scattering. The multiple recesses 23 are numerous and dispersed across the entire surface of the concave surface 215.

The reverse surface of the receiving surface 21 of the cover main body 2 (i.e., the surface facing the user when in use) is a surface that smoothly bulges backward, and the thickness of the portion of the cover main body 2 where the recessed portion 23 is provided is thinner than the thickness of the portion of the cover main body 2 where the recessed portion 23 is not provided (see Figure 3, etc.).

Each recess 23 is a circular recess with a circular opening and a circular bottom that is smaller than the opening. The shape of the recess 23 is not limited to this, and may be other shapes such as an ellipse, a polygon, or a combination of these. In one embodiment of the shatterproof cover 8, the multiple recesses 23 have the same dimensions and shape, but they may also have different dimensions or shapes. For example, the multiple recesses 23 arranged in the upper region of the concave surface 215 may differ in either or both of the dimensions and shape from the multiple recesses 23 arranged in the lower region, or the multiple recesses 23 arranged in the central region of the concave surface 215 may differ in either or both of the dimensions and shape from the multiple recesses 23 arranged in the peripheral region surrounding the central region.

Next, we will explain the holding surface 217. The holding surface 217 is located further forward than the concave surface 215 (i.e., on the side away from the user when in use) to more reliably prevent grass clippings and the like from scattering. The holding surface 217 has an angle that tilts further inward than the peripheral edge of the concave surface 215. The holding surface 217 has an arc-shaped contour that is convex upward.

Furthermore, in one embodiment of the splash guard cover 8, a fixing portion 25 is provided at the bottom of the cover main body 2 for fixing and suspending the flexible extension cover 7. The fixing portion 25 is an arc-shaped portion that bulges smoothly toward the rear. The portion of the cover main body 2 where the concave curved surface 215 is provided and the fixing portion 25 located below it are directly connected, but they may also be connected via another portion.

The fixing portion 25 can have any suitable structure as long as it can fix the upper end of the extension cover 7. However, to easily replace the extension cover 7, which is a consumable item, it is preferable to use a structure that fixes the extension cover 7 in a detachable manner.

The extension cover 7 is a flexible cover made of synthetic resin. The extension cover 7 may be transparent, translucent, or colored. The extension cover 7 has multiple slits 72 cut upward from the bottom edge of the extension cover 7. Each of the multiple slits 72 is linear and parallel to one another. Each portion of the extension cover 7 separated by the multiple slits 72 constitutes a flexible strip-shaped portion 74. In one embodiment of the scattering protection cover 8, the lower portion of the extension cover 7 (i.e., the multiple strip-shaped portions 74) can be rubbed against the ground, more reliably preventing grass clippings and the like from scattering.

1-4. Intermediate section The intermediate section 3 is composed of a first intermediate section 31 provided on the mounting section 1 side and a second intermediate section 32 provided on the cover main body 2 side. The second intermediate section 32 is rotatably connected to the first intermediate section 31. The relative angle of the cover main body 2 with respect to the mounting section 1 (hereinafter referred to as the "relative angle") can be freely changed via the first intermediate section 31 and the second intermediate section 32.

The first intermediate portion 31 is provided on the outer surface of the second end 122 of the connector 12 (see Figures 6, 7, etc.). The first intermediate portion 31 is molded integrally with the connector 12 from synthetic resin. The first intermediate portion 31 has a circular main body portion 311 that protrudes from the outer surface of the connector 12 and an insertion hole 313 that passes through the center of the main body portion 311.

The second intermediate portion 32 is provided on the outer surface of the lower part of the cover main body 2 (see Figure 5, etc.). The second intermediate portion 32 is molded integrally with the cover main body 2 from synthetic resin. The second intermediate portion 32 has a cylindrical rotating shaft 321 that protrudes from the outer surface of the lower part of the cover main body 2, and an annular peripheral wall portion 323 that also protrudes from the outer surface of the lower part of the cover main body 2. The peripheral wall portion 323 is positioned so as to surround the entire circumference of the rotating shaft 321. The rotating shaft 321 is composed of a cylindrical shaft that penetrates in the axial direction.

In the intermediate section 3, the rotation shaft 321 of the second intermediate section 32 is rotatably inserted into the insertion hole 313 of the first intermediate section 31, and the main body portion 311 of the first intermediate section 31 is rotatably fitted inside the peripheral wall portion 323 of the second intermediate section 32, thereby connecting the first intermediate section 31 and the second intermediate section 32 so as to be capable of rotating relative to each other.

In one embodiment of the splash guard cover 8, the intermediate portion 3 further includes a locking structure that fixes the relative angle of the cover main body 2, a spring structure that applies spring force to the cover main body 2, and a rotation restriction structure that restricts the relative angle of the cover main body 2 within a predetermined range. The locking structure, spring structure, and rotation restriction structure are described in detail below.

The locking structure includes a first engagement portion 41 integrally formed on the mounting portion 1 side and a second engagement portion 42 integrally formed on the cover main body portion 2 side. The first engagement portion 41 and the second engagement portion 42 are configured to be able to engage with each other at multiple rotation angles.

The first engagement portion 41 is composed of multiple pairs of engagement grooves 411, 412, 413 provided on the outer peripheral edge of the main body portion 311 of the first intermediate portion 31. In one embodiment of the shatterproof cover 8, the multiple pairs of engagement grooves 411, 412, 413 are three pairs of engagement grooves 411, 412, 413 positioned side by side in the circumferential direction of the main body portion 311. More specifically, they are a pair of first engagement grooves 411 positioned on opposite sides of the center of the main body portion 311 (in other words, the insertion hole 313), a pair of second engagement grooves 412 positioned on opposite sides of the center of the main body portion 311, and a pair of third engagement grooves 413 positioned on opposite sides of the center of the main body portion 311. A pair of first engagement grooves 411 and a pair of second engagement grooves 412 are positioned adjacent to each other in the circumferential direction, and a pair of second engagement grooves 412 and a pair of third engagement grooves 413 are positioned adjacent to each other in the circumferential direction.

The second engagement portion 42 is composed of a pair of engagement protrusions 421 located on opposite sides of the center of the second intermediate portion 32 (in other words, the rotation axis 321). The pair of engagement protrusions 421 selectively engage with one of the three pairs of engagement grooves 411, 412, 413. The relative angle of the cover main body 2 is determined by which pair of engagement protrusions 421 engages with.

The above-mentioned locking structure is configured to release the fixed relative angle of the cover main body 2 by moving the cover main body 2 in a predetermined direction (hereinafter referred to as the "first direction"). The first direction is a direction away from the attachment portion 1 along the central axis of rotation of the cover main body 2 (in other words, along the axial direction of the rotation shaft 321).

In other words, because all three pairs of engagement grooves 411, 412, and 413 are open in the first direction, moving the cover main body 2 in the first direction smoothly releases the engagement between a pair of engagement protrusions 421 and one of the three pairs of engagement grooves 411, 412, and 413. After releasing the engagement between a pair of engagement protrusions 421, rotating the cover main body 2 and moving it in the direction opposite to the first direction (hereinafter referred to as the "second direction") changes the relative angle of the cover main body 2, and then the pair of engagement protrusions 421 can be engaged with another pair of the three pairs of engagement grooves 411, 412, and 413.

Next, the spring structure will be described. The spring structure includes a coil spring 52 housed between the first intermediate portion 31 and the second intermediate portion 32 (see Figure 4). The coil spring 52 is a compression spring. The coil spring 52 is disposed in a compressed state between the head portion of the bolt 325 threaded into the through-hole of the rotation shaft 321 of the second intermediate portion 32 and the main body portion 311 of the first intermediate portion 31. The spring force that the compressed coil spring 52 imparts to the cover main body portion 2 via the first and second intermediate portions 31, 32 is a spring force that urges the cover main body portion 2 in the second direction.

Therefore, to disengage the first engagement portion 41 and the second engagement portion 42, for example, the cover main body 2 can be grasped with a hand and moved in the first direction against the spring force. If the cover main body 2 is rotated and then released, the spring force will move the cover main body 2 in the second direction. This allows the pair of engagement protrusions 421 to easily and stably engage with another pair of the three pairs of engagement grooves 411, 412, 413.

Next, the rotation restriction structure will be described. The rotation restriction structure includes a first rotation restriction portion 61 provided on the first intermediate portion 31 (i.e., integrally provided on the mounting portion 1 side), and a second rotation restriction portion 62 provided on the second intermediate portion 32 (i.e., integrally provided on the cover main body 2 side). The relative angle of the cover main body 2 can be changed within the range in which the first rotation restriction portion 61 and the second rotation restriction portion 62 fit together.

The first rotation restricting portion 61 is composed of a restricting groove 615 formed in the main body portion 311. The restricting groove 615 is an arc-shaped groove formed around the center of the circular main body portion 311 (in other words, centered on the insertion hole 313). The restricting groove 615 is open in the first direction, similar to the engagement grooves 411, 412, and 413 of the first engagement portion 41 (see Figure 6). The depth of the restricting groove 615 in the first direction is set to be sufficiently greater than the depth of the engagement grooves 411, 412, and 413 in the first direction.

The second rotation restricting portion 62 is composed of a restricting protrusion 625 located between the rotation shaft 321 and the peripheral wall portion 323 of the second intermediate portion 32 (see Figure 5, etc.). The restricting protrusion 625 is an arc-shaped protrusion formed around the center of the rotation shaft 321 and the peripheral wall portion 323 (in other words, with the rotation shaft 321 as the center). The restricting protrusion 625 protrudes in the same direction as the rotation shaft 321 and the peripheral wall portion 323. The protrusion amount of the restricting protrusion 625 is set to be smaller than the protrusion amount of the rotation shaft 321 and larger than the protrusion amount of the pair of engagement protrusions 421. The protrusion amount here refers to the protrusion amount along the central axis of rotation of the cover main body portion 2.

When inserted inside the restriction groove 615, the restriction protrusion 625 has dimensions that allow it to move within a predetermined range around the center of the rotation shaft 321 and peripheral wall portion 323 (see Figure 7). Within the range in which the relative angle of the cover main body 2 is restricted by the fit between the restriction protrusion 625 and the restriction groove 615, the pair of engagement protrusions 421 of the second engagement portion 42 can engage with any one of the three pairs of engagement grooves 411, 412, 413.

1-5. Usage To attach the splash guard cover 8 having the above-described configuration to the main shaft 92 of the brush cutter 9, as shown in FIG. 8A , insert the main shaft 92 into the C-shaped connector 12, and then operate the lever 14 in a direction away from the connector 12 to hook the tip portion 161 of the hook 16 into an appropriate one of the three grooves 181, 182, and 183. Next, as shown in FIG. 8B , operate the lever 14 in a direction toward the connector 12 to elastically deflect the entire synthetic resin connector 12 via the metal hook 16. As a result, the inner circumferential surface 125 of the connector 12 clamps a portion of the outer circumferential surface 925 of the main shaft 92 in the axial direction. Which of the three grooves 181, 182, and 183 the hook 16 is hooked into is determined based on the diameter of the main shaft 92.

In one embodiment, the splash guard cover 8 can be attached to the main shaft 92 of the brush cutter 9 and the relative angle of the cover body 2 can be changed in multiple steps with a single touch. In other words, as described above, the user can release the fixed relative angle of the cover body 2 by grasping the cover body 2 with their hand and moving it in the first direction away from the attachment part 1 against the spring force of the coil spring 52.

The cover body 2 can then be rotated to change the relative angle, and the spring force of the coil spring 52 can be used to move the cover body 2 in a second direction closer to the mounting portion 1, thereby fixing the changed relative angle. The cover body 2 rotates around an axis (an axis extending left and right when in use) that is not parallel to the central axis of the main shaft 92.

By setting the cover body 2 at an appropriate relative angle and then using the brush cutter 9 to mow the grass, it is possible to effectively prevent grass clippings and other debris from flying toward the user. In particular, when mowing using multiple linear cutters 94, grass clippings tend to fly over a wide area. However, by installing the scattering protection cover 8 of one embodiment, which is suitable for this type of mowing, scattering of grass clippings and other debris toward the user is significantly reduced.

In other words, grass clippings and other debris scattered toward the user after cutting hit the concave surface 215 of the cover body 2, preventing them from scattering widely in the surrounding area. The concave surface 215 has multiple recesses 23 distributed throughout, effectively reducing the force with which the grass clippings bounce back. Furthermore, the provision of a holding surface 217 around the concave surface 215 of the cover body 2 further effectively prevents grass clippings and other debris from scattering widely.

2. Modifications The present disclosure has been described above based on the embodiments shown in the accompanying drawings, but the present disclosure is not limited to the above embodiments. Appropriate design modifications can be made within the intended scope of the present disclosure.

As an example, the concave curved surface 215 of the cover main body 2 has both an arc-shaped cross section in both the longitudinal and transverse directions, but this is not limited to this and it is sufficient that the overall surface is a concave curved surface that is recessed toward the rear.

Furthermore, the cover main body 2 is provided with a clamping surface 17, multiple recesses 23, and fixing portions 25, but these are not required, and some or all of these may be omitted.

3. Effects As explained based on the above embodiment and modified examples, the scattering protection cover (8) of the present disclosure is a scattering protection cover (8) that is attached to the main shaft (92) of a brush cutter (9), and includes an attachment part (1) that is attached to the main shaft (92) and a cover main body part (2) that is attached to the main shaft (92) via the attachment part (1). The cover main body part (2) has a receiving surface (21) for receiving grass clippings, and the receiving surface (21) is mainly composed of a concave curved surface (215) that is recessed toward the rear.

Therefore, with the scattering protection cover (8) disclosed herein, by setting it so that grass clippings and the like come into contact with the concave curved surface (215) of the cover main body (2), it is possible to effectively prevent grass clippings and the like from scattering toward the user.

Furthermore, in the shatterproof cover (8) of the present disclosure, the longitudinal and transverse cross sections of the concave curved surface (215) are both arc-shaped cross sections that are concave toward the rear.

Therefore, the scattering protection cover (8) disclosed herein can more effectively prevent grass clippings and the like from scattering toward the user.

In addition, in the shatterproof cover (8) of the present disclosure, a retaining surface (217) is provided on the peripheral edge of the receiving surface (21) that is tilted further inward than the concave curved surface (215).

Therefore, with the scattering protection cover (8) disclosed herein, the presence of the containment surface (217) can more effectively prevent grass clippings and the like from scattering toward the user.

In addition, in the shatterproof cover (8) of the present disclosure, the cover main body (2) is provided with a fixing portion (25) for fixing and suspending the flexible extension cover (7). The fixing portion (25) has an arc-shaped configuration that is concave toward the rear.

Therefore, with the scattering protection cover (8) disclosed herein, the flexible extension cover (7) can be suspended and supported in a concave shape facing backward, and this shape of the extension cover (7) can more effectively prevent grass clippings and the like from scattering toward the user.

In addition, in the scattering protection cover (8) of the present disclosure, the concave curved surface (215) has multiple recesses (23) spaced apart from one another to prevent grass clippings from scattering.

Therefore, with the scattering protection cover (8) of the present disclosure, the presence of multiple recesses (23) effectively reduces the momentum of grass clippings and other debris when they bounce off the concave surface (215). This effectively prevents grass clippings and other debris from scattering widely.

Furthermore, in the shatterproof cover (8) of the present disclosure, multiple recesses (23) are dispersed over the entire surface of the concave curved surface (215).

Therefore, the scattering protection cover (8) of the present disclosure more effectively reduces the force of grass clippings and other debris when they hit the concave surface (215) and bounce back.

The brush cutter (9) of the present disclosure includes the above-described splash guard cover (8) of the present disclosure and a main shaft (92) to which the splash guard cover (8) is attached.

Therefore, with the brush cutter (9) disclosed herein, the concave curved surface (215) of the cover body (2) of the scattering protection cover (8) can effectively prevent grass clippings and the like from scattering toward the user.

REFERENCE SIGNS LIST 1 Mounting portion 2 Cover main body portion 21 Receiving surface 215 Concave curved surface 217 Retaining surface 23 Recessed portion 25 Fixing portion 7 Extension cover 8 Splash protection cover 9 Brush cutter 92 Main shaft

Claims (4)

A splash guard cover attached to the main shaft of a brush cutter,
a mounting portion mounted on the spindle;
a cover main body portion attached to the spindle via the attachment portion,
The cover main body has a receiving surface for receiving grass clippings, and the receiving surface is mainly formed of a concave curved surface that is recessed toward the rear,
The concave curved surface has a plurality of recesses spaced apart from one another to prevent grass clippings from scattering.
Shatterproof cover. The plurality of recesses are dispersed and arranged over the entire surface of the concave curved surface.
The shatterproof cover of claim 1. The longitudinal section and the transverse section of the concave curved surface are both arc-shaped sections concave toward the rear.
The shatterproof cover of claim 1 or 2. The splash protection cover according to any one of claims 1 to 3;
The main shaft to which the splash protection cover is attached,
Brush cutter.