JP7709196B2 - Splash protection cover and brush cutter - Google Patents

Description

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

Scattering protection covers for brush cutters are known in the art (see Patent Document 1, etc.). By attaching this type of scattering 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 splash guard covers mentioned above have a fixed angle relative to the main shaft of the brush cutter, so they may not be suitable for the user's physique or usage conditions.

The purpose of this disclosure is to make it possible to change the angle of the splash guard cover depending on the user's physique and usage conditions.

The splash guard cover according to one aspect of the present disclosure is a splash guard cover that is attached to the main shaft of a brush cutter, and includes an attachment part that is attached to the main shaft, a cover main body part, and an intermediate part that connects the attachment part and the cover main body part. The angle of the cover main body part relative to the attachment part can be freely changed via the intermediate part.

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 advantage that the angle of the splash guard cover can be changed depending on the user's physique and usage conditions.

FIG. 1 is a perspective view of a splash guard cover according to one embodiment. FIG. 2 is a top view of the above splash guard cover. FIG. 3 is a cross-sectional view taken along line AA of FIG. FIG. 4 is a cross-sectional view taken along line BB of FIG. FIG. 5 is a perspective view of a main part of a cover body provided in the above-mentioned scattering protection cover. FIG. 6 is a perspective view of a connector included in a mounting portion of the 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 scattering protection cover attached to a brush cutter when in use.

1. Embodiment 1-1. Overall Structure Fig. 9 shows a scattering protection cover 8 according to one embodiment 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 a first axial end of the main shaft 92, an engine 96 mounted on a second axial end of the main shaft 92, and a handle 98 connected to an axial middle portion of the main shaft 92. 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-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, and when the rotating shaft is rotated by the drive of 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, it is also possible to attach a rotary blade such as a chip saw to the first axial end side of the main shaft 92.

A shoulder strap 97 is also attached to the main shaft 92, and the user can put the shoulder strap 97 on their shoulder, hold the handle 98, and mow the grass while swinging the brush cutter 9 from side to side.

The scattering protection cover 8 is attached to a portion of the axial direction of the main shaft 92. The scattering protection cover 8 is mainly formed of 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 components of the splash guard cover 8 are explained in more detail below.

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 and 6, the connector 12 is a C-shaped member having a smoothly concavely curved inner circumferential surface 125. The connector 12 is made of, for example, 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 is pressed against a portion of the outer peripheral surface 925 (see FIG. 9) of the main shaft 92 in the axial direction, and is configured to clamp the portion of the outer peripheral surface 925. In this way, the connector 12 is 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 provided so as to protrude upward when in use, and when no external force is applied, the first end 121 and the second end 122 are inclined so as to approach 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 in a direction 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 is provided with a protruding portion 126. The protruding portion 126 of the second end 122 has a plurality of hooks 18 formed thereon. The protruding portion 126 of the second end 122 protrudes in the same direction as the protruding portion 123 of the first end 121. The protruding portion 126 of the second end 122 protrudes in a direction away from the gap 128, similar to the protruding portion 123 of the first end 121. The two protruding portions 123, 126, which are spaced apart, are parallel to each other. The two protruding portions 123, 126 protrude upwards when in use. The term "parallel" used in the present text 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, for example, a member made of synthetic resin, and has a shape in which a short side portion 141 and a long side portion 142 cross in an L-shape. A connecting portion 144 is formed at the protruding portion of the short side portion 141 for rotatably connecting to the connecting portion 124 of the connecting device 12. The connecting portions 124, 144 rotatably fit together, so that the lever 14 is rotatably connected to the protruding portion 126 of the connecting device 12, and thus to the first end portion 121. The lever 14 is displaceable relative to the connecting device 12.

The long side 142 is the part that the user uses to operate the lever, and its tip is curved so that the user can easily hook his/her finger on it. The tip of the long side 142 is curved 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 distant 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 made 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 FIG. 2). The pair of extension portions 162 are inclined so that the distance between them increases as they move away from the straight portion 161. The tip portion (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 FIG. 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 provided so that the tip portion 161 of the hook 16 can be hooked selectively.

The opening direction of the three grooves 181, 182, 183 is opposite to 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 to 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, 183 are formed.

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

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

In one embodiment of the shatterproof cover 8, the inner diameter of the mounting part 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 mounting part 1 is hooked into the first, second, or third groove 181, 182, or 183. When the hook 16 of the mounting part 1 is hooked into the first groove 181, due to the geometric relationship between the connector 12, the lever 14, and the hook 16, the connector 12 undergoes a relatively large elastic deformation so as to clamp a main shaft 92 having 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 having 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 having a relatively large diameter (e.g., 26 mm diameter).

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

The receiving surface 21 includes a concave surface 215 that constitutes the main portion of the receiving surface 21, and a clamping surface 217 that constitutes the peripheral portion 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 FIG. 3, the vertical cross section of the concave surface 215 is an arc-shaped cross section that is concave toward the rear. Also, as shown in FIG. 4, the horizontal cross section of the concave surface 215 is an arc-shaped cross section that is concave toward the rear. Here, the rear is based on the user when in use.

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

The concave surface 215 has a number of recesses 23 spaced apart from each other to more effectively prevent grass clippings and the like from scattering. The multiple recesses 23 are a large number of recesses 23 distributed over the entire surface of the concave surface 215.

The back surface of the receiving surface 21 of the cover 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 body 2 where the recessed portion 23 is provided is thinner than the thickness of the portion of the cover body 2 where the recessed portion 23 is not provided (see Figure 3, etc.).

Each recess 23 is a circular recess, has a circular opening, and has a circular bottom surface smaller than the opening. The shape of the recess 23 is not limited to this, and may have other shapes such as an elliptical shape, a polygonal shape, or a combination of these. In one embodiment of the shatterproof cover 8, the recesses 23 have the same dimensions and shapes, but they may have different dimensions or shapes. As an example, the recesses 23 arranged in the upper region of the concave curved surface 215 may differ in either or both of the dimensions and shapes, or the recesses 23 arranged in the central region of the concave curved surface 215 may differ in either or both of the dimensions and shapes, or the recesses 23 arranged in the peripheral region surrounding the central region may differ in either or both of the dimensions and shapes.

Next, the control surface 217 will be described. The control surface 217 is located forward of the concave surface 215 (i.e., on the side away from the user when in use) in order to more reliably control the scattering of grass clippings and the like. The control surface 217 has an angle that is inclined further inward than the peripheral portion of the concave surface 215. The control surface 217 has an outline that is an upwardly convex arc shape.

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

The fixing part 25 can have any suitable structure as long as it can fix the upper end of the extension cover 7, but in order to easily replace the extension cover 7, which is a consumable item, it is preferable to adopt a structure that fixes the extension cover 7 in a removable manner.

The extension cover 7 is a flexible synthetic resin cover. The extension cover 7 may be transparent or translucent, or may be colored. The extension cover 7 has a plurality of slits 72 cut upward from the lower edge of the extension cover 7. The slits 72 are each linear and parallel to one another. Each portion of the extension cover 7 separated by the slits 72 constitutes a flexible rectangular portion 74. In one embodiment of the scattering protection cover 8, the lower portion of the extension cover 7 (i.e., the rectangular portions 74) can be rubbed against the ground to more reliably prevent 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 side of the mounting section 1 and a second intermediate section 32 provided on the side of the cover main body section 2. The second intermediate section 32 is rotatably connected to the first intermediate section 31. The relative angle of the cover main body section 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 portion 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 portion of the cover body 2 (see FIG. 5, etc.). The second intermediate portion 32 is molded integrally with the cover body 2 from synthetic resin. The second intermediate portion 32 has a cylindrical rotating shaft 321 protruding from the outer surface of the lower portion of the cover body 2, and an annular peripheral wall portion 323 protruding from the outer surface of the lower portion of the cover 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 body 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, so that the first intermediate section 31 and the second intermediate section 32 are connected to each other so as to be capable of rotating relative to each other.

In one embodiment of the shatterproof cover 8, the middle section 3 further includes a locking structure that fixes the relative angle of the cover body section 2, a spring structure that applies a spring force to the cover body section 2, and a rotation restriction structure that restricts the relative angle of the cover body section 2 within a predetermined range. Below, the locking structure, spring structure, and rotation restriction structure are described in detail in that order.

The locking structure includes a first engagement portion 41 that is integrally provided on the side of the mounting portion 1, and a second engagement portion 42 that is integrally provided on the side of the cover body portion 2. 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 periphery 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, a pair of first engagement grooves 411 positioned on opposite sides to each other with respect to 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 to each other with respect to the center of the main body portion 311, and a pair of third engagement grooves 413 positioned on opposite sides to each other with respect to the center of the main body portion 311. The pair of first engagement grooves 411 and the pair of second engagement grooves 412 are located adjacent to each other in the circumferential direction, and the pair of second engagement grooves 412 and the pair of third engagement grooves 413 are located 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 engage with among the three pairs of engagement grooves 411, 412, 413.

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

In other words, since all three pairs of engagement grooves 411, 412, 413 are open in the first direction, when the cover body 2 is moved in the first direction, the pair of engagement protrusions 421 is smoothly disengaged from any one of the three pairs of engagement grooves 411, 412, 413. After disengaging the pair of engagement protrusions 421, by rotating the cover body 2 and moving the cover body 2 in a direction opposite to the first direction (hereinafter referred to as the "second direction"), the relative angle of the cover body 2 can be changed and the pair of engagement protrusions 421 can be engaged with another pair of the three pairs of engagement grooves 411, 412, 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 FIG. 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 screwed 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 biases the cover main body portion 2 in the second direction.

Therefore, to release the engagement between the first engagement portion 41 and the second engagement portion 42, for example, the cover body 2 can be grasped with a hand and moved in a first direction against the spring force. If the cover body 2 is rotated and then released, the cover body 2 moves in a second direction due to the spring force. This makes it possible to easily and stably engage the pair of engagement protrusions 421 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 part 61 provided on the first intermediate part 31 (i.e., integrally provided on the side of the mounting part 1) and a second rotation restriction part 62 provided on the second intermediate part 32 (i.e., integrally provided on the side of the cover main body part 2). The relative angle of the cover main body part 2 can be changed within the range in which the first rotation restriction part 61 and the second rotation restriction part 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 a groove formed in an arc shape 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 FIG. 6). The depth dimension of the restricting groove 615 in the first direction is set sufficiently larger than the depth dimension of the engagement grooves 411, 412, and 413 in the first direction.

The second rotation regulating portion 62 is composed of a regulating protrusion 625 located between the rotation shaft 321 and the peripheral wall portion 323 of the second intermediate portion 32 (see FIG. 5, etc.). The regulating protrusion 625 is a protrusion formed in an arc shape around the center of the rotation shaft 321 and the peripheral wall portion 323 (in other words, centered on the rotation shaft 321). The regulating protrusion 625 protrudes in the same direction as the rotation shaft 321 and the peripheral wall portion 323. The protrusion amount of the regulating 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 is the protrusion amount along the central axis of rotation of the cover main body portion 2.

The restricting protrusion 625 has a dimension and shape that allows it to move within a predetermined range around the center of the rotating shaft 321 and the peripheral wall portion 323 when inserted inside the restricting groove 615 (see FIG. 7). Within the range in which the relative angle of the cover body portion 2 is restricted by the fit between the restricting protrusion 625 and the restricting groove 615, the pair of engaging protrusions 421 of the second engaging portion 42 can engage with any one of the three pairs of engaging grooves 411, 412, 413.

1-5. Usage To attach the splash guard cover 8 having the above-mentioned configuration to the main shaft 92 of the brush cutter 9, as shown in FIG. 8A, the main shaft 92 is inserted into the C-shaped connector 12, and the lever 14 is operated in a direction away from the connector 12 to hook the tip end portion 161 of the hook 16 into an appropriate groove among the three grooves 181, 182, and 183. Next, as shown in FIG. 8B, the lever 14 is operated in a direction approaching the connector 12 to elastically deflect the entire connector 12 made of synthetic resin via the metal hook 16. As a result, the inner peripheral surface 125 of the connector 12 clamps a part of the outer peripheral surface 925 of the main shaft 92 in the axial direction. Which of the three grooves 181, 182, and 183 the hook 16 is to be hooked into is determined according to the diameter of the main shaft 92.

In one embodiment of the splash guard cover 8, the relative angle of the cover body 2 can be changed in multiple steps with a single touch while the cover is attached to the main shaft 92 of the brush cutter 9. In other words, as described above, the user grasps the cover body 2 with their hands and moves the cover body 2 in the first direction away from the attachment part 1 against the spring force of the coil spring 52, thereby releasing the fixation of the relative angle of the cover body 2.

The cover body 2 is then rotated to change the relative angle, and the spring force of the coil spring 52 is used to move the cover body 2 in the second direction toward the mounting part 1, and the changed relative angle is fixed. The cover body 2 rotates about an axis that is not parallel to the central axis of the main shaft 92 (an axis that extends left and right when in use).

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 scattering toward the user. In particular, when multiple linear cutters 94 are used to mow the grass, the clippings tend to scatter over a wide area, but by installing an embodiment of the scattering protection cover 8 that is suitable for this type of mowing work, scattering of grass clippings toward the user is significantly prevented.

In other words, grass clippings, etc. that are scattered toward the user after cutting, hit the concave surface 215 of the cover body 2, preventing them from scattering widely around. The concave surface 215 has multiple recesses 23 distributed thereon, which effectively reduces the force with which the grass clippings bounce back. In addition, the holding surface 217 is provided around the concave surface 215 of the cover body 2, further effectively preventing the grass clippings, etc. from scattering widely.

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

As an example, the relative angle of the cover body portion 2 can be changed stepwise via the intermediate portion 3, but is not limited to this and may be configured to be changeable continuously.

The fixation of the relative angle of the cover body 2 can be released by moving the cover body 2 in the first direction, but the fixation and release of the relative angle of the cover body 2 may be made switchable by other means.

The locking structure also includes a spring structure consisting of a coil spring 5, but it is possible that this type of spring structure is not provided.

The locking structure is composed of a first engagement part 41 provided on the side of the mounting part 1 and a second engagement part 42 provided on the side of the cover body part 2, but may be composed of other means.

In addition, the intermediate section 3 includes a rotation restriction structure composed of a first rotation restriction section 61 and a second rotation restriction section 62, but the rotation restriction structure may be formed by other means, or this type of rotation restriction structure may not be provided.

In addition, although multiple recesses 23 are provided on the concave surface 215 of the cover body 2, it is possible that these recesses 23 are not provided.

3. Effects and Effects As explained based on the above embodiment and modified example, the scattering protection cover (8) disclosed herein is a scattering protection cover (8) that is attached to the main shaft (92) of a brush cutter (9), and includes a mounting part (1) that is attached to the main shaft (92), a cover main body part (2), and an intermediate part (3) that connects the mounting part (1) and the cover main body part (2). The angle of the cover main body part (2) relative to the mounting part (1) can be freely changed via the intermediate part (3).

Therefore, with the shatterproof cover (8) disclosed herein, the angle of the cover body (2) can be easily changed depending on the user's physique and usage conditions.

In addition, in the shatterproof cover (8) disclosed herein, the angle can be changed in stages.

Therefore, with the shatterproof cover (8) disclosed herein, the angle of the cover body (2) can be easily changed in multiple stages depending on the user's physique and usage conditions.

In addition, in the shatterproof cover (8) disclosed herein, the middle part (3) includes a locking structure that fixes the angle. The locking structure is configured to release the fixation of the angle by moving the cover body part (2) in a direction along its own central axis of rotation.

Therefore, with the shatterproof cover (8) disclosed herein, the angle of the cover body (2) can be changed, and the angle can be prevented from being changed unexpectedly.

In addition, in the shatterproof cover (8) of the present disclosure, the locking structure further includes a spring structure that applies a spring force to the cover body portion (2). The spring force biases the cover body portion (2) in a direction opposite to the aforementioned direction.

Therefore, according to the shatterproof cover (8) disclosed herein, the angle of the cover body (2) can be changed by moving the cover body (2) against the spring force, and the spring force prevents the angle from being changed unexpectedly.

In addition, in the shatterproof cover (8) of the present disclosure, the locking structure includes a first engagement portion (41) provided on the mounting portion (1) and a second engagement portion (42) provided on the cover body portion (2). 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.

Therefore, according to the shatterproof cover (8) disclosed herein, the angle of the cover body part (2) can be reliably prevented from being changed unexpectedly by the engagement between the first engagement part (41) and the second engagement part (42), and the angle of the cover body part (2) can be changed by moving the cover body part (2) in a predetermined direction.

In addition, in the scattering protection cover (8) of the present disclosure, the middle section (3) includes a first rotation restriction section (61) provided on the mounting section (1) and a second rotation restriction section (62) provided on the cover body section (2). The angle between the mounting section (1) and the cover body section (2) can be changed within the range in which the first rotation restriction section (61) and the second rotation restriction section (62) fit together.

Therefore, the shatterproof cover (8) disclosed herein prevents the cover body (2) from accidentally rotating too far even when the angle is released.

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

Therefore, with the brush cutter (9) disclosed herein, the angle of the splash guard cover (8) can be easily changed depending on the user's physique and usage conditions.

REFERENCE SIGNS LIST 1 Attachment part 12 Connector 2 Cover main body part 3 Intermediate part 41 First engagement part 42 Second engagement part 61 First rotation restricting part 62 Second rotation restricting part 8 Splash protection cover 9 Brush cutter 92 Main shaft

Claims (5)

A splash guard cover attached to a main shaft of a brush cutter, comprising:
A mounting portion that is mounted on the spindle;
A cover main body portion;
an intermediate portion connecting the mounting portion and the cover main body portion;
The angle of the cover body portion with respect to the mounting portion can be changed stepwise via the intermediate portion ,
the intermediate portion includes a lock structure that fixes the angle,
The locking structure is configured to release the fixation of the angle by moving the cover main body in a direction along its rotation central axis.
Shatterproof cover. The lock structure further includes a spring structure that applies a spring force to the cover body portion,
The spring force is a spring force that urges the cover main body in a direction opposite to the direction.
2. The shatterproof cover of claim 1. The locking structure includes a first engagement portion provided on the mounting portion and a second engagement portion provided on the cover body portion,
The first engagement portion and the second engagement portion are configured to be able to engage with each other at a plurality of rotation angles.
3. The shatterproof cover of claim 1 or 2. A splash guard cover attached to a main shaft of a brush cutter, comprising:
A mounting portion that is mounted on the spindle;
A cover main body portion;
an intermediate portion connecting the mounting portion and the cover main body portion;
The angle of the cover body portion with respect to the mounting portion can be changed stepwise via the intermediate portion,
The intermediate portion includes a first rotation restricting portion provided on the mounting portion and a second rotation restricting portion provided on the cover main body portion,
The mounting portion and the cover main body portion are capable of changing an angle within a range in which the first rotation restricting portion and the second rotation restricting portion fit together.
Shatterproof cover. The splash guard cover according to any one of claims 1 to 4,
The main shaft to which the splash protection cover is attached,
Brushcutter.