How to Remove the Protective Guard from the Trimmer EVDIRAL.RU
Trimmer and protective casing for him
The owners of the patent RU 2500095:
A trimmer is provided with a cutting blade and a protective casing configured to partially close the cutting blade. The protective casing comprises a main body and a sliding part made with the possibility of removable fastening to the main body. One of the parts, including the main body or the sliding part of the protective casing, is equipped with a snap section, and the other element is equipped with an engaging hole configured to accept the engagement of the snap section from the inside and open the engaged snap section from the outside. The engaging hole has a size that allows the passage of the tool, but prevents the passage of the finger. Accordingly, it is required, very little, one tool to detach the sliding part. The result is increased mounting reliability and safety during use. 2 n. and 4 z.p. f-ly, 10 ill.
The true invention relates to a trimmer and a protective cover for it.
DESCRIPTION OF THE PRIOR ART
A trimmer that cuts grass and shrubs is well known. The trimmer is provided with a cutting blade that rotates, and a protective cover that partially covers the cutting blade. In this type of trimmer, when the cutting blade is replaced with a blade of a different size and / or type, the size of the protective cover does not match the cutting blade, and the cutting blade may touch the protective cover, or the cutting blade may protrude more than necessary from the protective cover.
With regard to the difficulty described a little higher, Japanese Patent Application Laid-open No. 2001-333616 and US Pat. No. 4,864,728 disclose a trimmer that is made in such a way that a portion of the protective cover is removably attached. In this trimmer, the protective casing is provided by the main body and the sliding part, and the size of the protective casing can be adjusted by attaching and detaching the sliding part. In other words, it may be possible to make the protective cover larger by attaching the expandable portion, and it may be to make the protective cover smaller by detaching the expandable portion. Alternatively, it may also be possible to change the size of the protective cover by replacing the attached sliding part.
A conventional protective cover has a structure in which the sliding part can be simply attached and detached without the use of a tool. If a design of this type is chosen, then when the protective casing is in contact with the outer element, for example, the sliding part can unintentionally detach, and the user’s work can be blocked. over, in certain countries and / or regions, a design that allows the detachable part to be detached without using a tool may be prohibited by law.
In connection with these circumstances, a design that secures the sliding part with screws or bolts may be proposed. By the choice of this design, it can be firmly fixed to the sliding part, in such a way that inadvertent detachment of the sliding part is prevented. But the screws or bolts can weaken from shock and vibration, and, as follows, there is a brand new problem that the screws or bolts can fall out. over, in a design using screws or bolts, attaching the sliding part asks for a tool and also takes time, causing excessive inconvenience for the user.
In view of the troubles of the prior art outlined above, the true description opens a protective cover for the trimmer, in which the sliding part can be simply attached, and the attached sliding part is prevented from falling out.
Technical obstacle solution
The trimmer contains a cutting blade and a protective casing, made with the possibility of partial closing of the cutting blade. The protective casing comprises a main body and a sliding part, made with the possibility of removable fastening to the main body, and the sliding part is made not requiring any tool for its attachment to the main body, but requiring very little 1 tool to detach it from the main body. According to this trimmer, the user can simply attach the sliding part without using a tool. As attached, the sliding part is firmly fixed to the main body and cannot be detached without the use of a tool. Power trimmer electro with a different bobbin design how to remove the protective cover. As follows, inadvertent detachment of the sliding part from the main body is prevented.
One of the parts including the main body and the expandable part of the protective casing may desirably be provided with a snap portion, the other of the parts including the main body and the expandable part of the protective casing may desirably be equipped with an engaging hole, and the engaging hole may desirably be adapted engaging the snap-in portion from the inside and opening the engaged snap-in portion from the outside. The engaging hole may desirably have a size that allows the passage of the tool, but prevents the passage of the finger. For this trimmer, when the sliding part is attached to the main body, the snap-in portion can cling to the engaging hole, while at the same time passively deforming. How to start with a gas trimmer and if you remove the protective cover c. How to remove the head from the trimmer and change how to remove and disassemble in the huter and champion devices. A tool is not required for this. When detaching the sliding part from the main body, the snap-in portion engaged with the engaging hole will need to be pressed with inventory in order to disengage. In other words, the sliding part cannot be detached without the use of a tool. According to this design, a separate connecting element, such as a pin, is not required, and troubles such as falling out of this type of connecting element can be avoided.
Preferably, if the sliding part is adapted to be attached to the main body by sliding in one radial direction relative to the main body and detached from the main body by sliding in the other radial direction relative to the main body, the snap-in portion can be placed on the end portion in one radial direction of the main body or end portion in another radial direction of the expandable part. According to this design, the section where the snap-in portion is in contact with the main body or the expandable part when the expandable part slides relative to the main body may be shortened. In other words, the section in which the resistance appears due to the contact of the latch portion can be shortened.
Preferably, one of the parts, including the main body and the expandable part of the protective casing, may be provided with a contact portion configured to contact the snap portion from the inside when the snap portion is pushed out of the engaging hole by inventory. According to this design, even if the user presses the latched portion very hard with the inventory, the latched portion is not extremely deformed, and breaking of the latched portion can be prevented.
Desirably, the trimmer related to the true invention may comprise a workstand including a tip on which the cutting blade is placed, and a safety rod extending from the workstand and arranged to be in front of the user when the user is holding the trimmer. In this case, the snap-in portion engaged with the engaging hole and the safety rod rich on the work stand may desirably be placed on one side relative to a plane containing the axis of rotation of the cutting blade and the central axis of the work stand. Usually, the user does the detachment of the sliding part, putting the trimmer on the ground. In this case, when the latch portion engaged with the engagement hole is oriented upward, then the latch portion may simply be pressed by inventory. But, if the protective rod, which is rich on the working stand, is placed on the back side of the snap section, which is engaged with the engaging hole, then this means that the trimmer rests on the protective rod, and the position of the trimmer is unstable. As it follows, the snap-in area, which may desirably be engaged with the engaging hole, and the safety rod, which is rich on the work stand, are placed on one side, as a result of which the user can simply perform the task of detaching the sliding part in the lying position of the trimmer.
BRIEF DESCRIPTION OF THE DRAWINGS
1 is a schematic view showing a trimmer according to an embodiment.
Figure 2 is an external view showing the cutting unit from above.
Figure 3 is an external view showing the cutting unit from the side.
Figure 4 is an external view showing the cutting unit from above (when the sliding part has been extended).
5 is an external view showing the cutting unit from the side (when the expandable portion has been extended).
Fig.6 is a view in section along the strip VI-VI of Fig.2.
FIG. 7 indicates an enlarged view of region VII of FIG. 3.
Fig. 8 indicates an enlarged view of region VIII of Fig. 5.
Fig.9 is a view in section along the strip IX-IX of Fig.7.
Figure 10 is a sectional view along strip X-X of Figure 7.
MODE FOR CARRYING OUT THE INVENTION
A trimmer 10 according to an embodiment is described here with reference to the drawings. Trimmer 10 is one type of motorized garden tool that is generally used to cut grass. As shown in FIG. 1, the trimmer 10 comprises: a workstand 60, a cutting assembly 20, rich at the front end of the main stand 60, and a drive assembly 70, rich at the rear end of the workstand 60. The battery 80 is removably mounted in the drive assembly 70.
Workstand 60 is a hollow tubular element. A spinning shaft (not shown), which lasts from the drive unit 70 to the cutting unit 20, is provided inside the working stand 60. The spinning shaft is driven to rotate by the drive unit 70, and transmits torque from the drive unit 70 to the cutting unit 20.
The cutting unit 20 comprises a cutting blade 22 and a protective cover 30. The cutting blade 22 is removably mounted on the cutting unit 20. The cutting blade 22 shown in FIG. 1 is the so-called forest cutting head and has a nylon fishing line 22a that cuts grass and bushes. Also, a circular disk cutting blade may be installed in the cutting assembly 20, instead of the cutting blade 22 of the type shown in FIG. The cutting blade 22 mounted in the cutting unit 20 is rotatably supported and is also connected to the rotating shaft described above.
The protective casing 30 partially covers the cutting blade 22. The protective casing 30 has a main body 40 that is attached to the work stand 60, and a sliding part 50 that is attached to the main body 40. The protective casing 30 can be increased by attaching the sliding part 50 and can be reduced detachment of the sliding part 50. over, the size of the protective casing 30 can be changed by replacing the sliding part 50 with a sliding part of another shape or size. Carefully the design of the protective casing 30 will be described below.
Huter Trim Guard Assembly
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The drive unit 70 is a unit for driving the cutting blade 22, and includes a motor, a gearbox and a control circuit. The drive unit 70 is connected to the cutting blade 22 of the cutting unit 20 by means of a rotating shaft, which was described above. The drive unit 70 is powered by electric power from the battery 80 and drives the cutting blade 22 of the cutting unit 20, causing rotation of the rotating shaft.
The loopback handle 62, the safety rod 64 and the handle 66 are provided on the workstand 60. The loopback handle 62 is attached to the intermediate portion of the workstand 60. The loopback handle 62 continues as a loop on the upper side of the workstand 60. The loopback handle 62 is formed by bending the tubular element in the form hinges, and is attached to the work stand 60 in a direction that intersects the longitudinal direction of the work stand 60. The handle 66 is secured between the loop handle 62 and the drive assembly 70. A handle 66 is provided along the workstand 60. A trigger switch 68, which is actuated by the user, is provided on the handle 66.
The user typically holds the trimmer 10 while holding the loop-shaped handle 62 with his left hand and holding the handle 66 with his right hand. Installing the coil with remove the coil 17 as if it was possible to close the protective cover. In this case, the cutting unit 20 is located in front of the user, the drive unit 70 is located behind the user, and the work stand 60 is located on the right side of the user. The user is able to cut shrubs growing on the ground by moving the rotating cutting blade 22 left and right above the ground. The cutting blade 22 is driven and stopped by the trigger switch 68 on the handle 66.
The protective rod 64 extends in one direction from the work stand 60. The protective rod 64 is located near the loopback handle 62 and is located in front of the user when the user is holding the trimmer 10. The protective rod 64 prevents the cutting unit 20 from approaching the user when the trimmer 10 experiences a large reaction force, eg. Safety bar 64 is not absolutely necessary.
Next, the design of the protective casing 30 will be described in detail. As shown in FIGS. 2 and 3, the main body 40 of the protective cover 30 has an upper surface portion 40a that is attached to the workstand 60 and a peripheral wall portion 40b that extends down the perimeter of the upper surface portion 40a. The sliding part 50 of the protective casing 30 is attached to the lower end of the peripheral wall portion 40b of the main body 40.
As shown in FIG. 2, FIG. 3 and FIG. 6, a guide portion 42, which continues in a circular direction, is formed on the main body 40. How to remove the head from the trimmer and how to remove and disassemble the coil. Before you open. This guide portion 42 extends along the lower end of the peripheral wall portion 40b. On the other hand, a plurality of guide receiving portions 52, which movably engages with the guide portion 42, are formed in the expandable portion 50. This plurality of guide receiving portions 52 are arranged in a circular direction along the upper end of the expandable portion 50. Therefore, the extendible portion 50 is movably supported relative to the main body 40, as shown in FIG. 4 and FIG. 5. The sliding part 50 is attached to the main body 40 by sliding in one circular direction relative to the main body 40 (direction D1 shown in FIG. 4), and detached from the main body 40 by sliding in the other circular direction relative to the main body 40 (direction D2 shown in FIG.4).
As shown in FIG. 5, the cutting portion 32 is provided on the expandable portion 50. The cutting portion 32 cuts off the end of the nylon fishing line 22a. How to remove the coil from the Makita um3830 trimmer. The cutting blade 22 according to the present embodiment has a built-in reel on which nylon fishing line 22a is wound, and a button 22b that unwinds the nylon fishing line 22a is provided on its lower surface. The cutting blade 22 is arranged so that the nylon fishing line 22a is unwound to a predetermined length when the button 22b is pressed while the cutting blade 22 is rotated. Therefore, the user is able to unwind the new nylon fishing line 22a by pressing the button 22b of the cutting blade 22 to the ground when the nylon fishing line 22a comes off during operation. In this case, the front end of the nylon fishing line 22a is cut off by the cutting portion 32, and the nylon fishing line 22a is adjusted to an appropriate length.
FIG. 7 shows an enlarged view of a region VII of FIG. 3, and FIG. 8 shows an enlarged view of a region VIII of FIG. 5. FIG. 9 shows a sectional view along the line IX-IX of FIG. 7, and FIG. 10 shows a sectional view along the line X-X of FIG. 7. As shown in FIG. 7, FIG. 8, FIG. 9, and FIG. 10, a snap portion 54 is formed on the expandable portion 50 of the protective cover 30, and an engaging hole 44 that accepts the engagement of the snap portion 54 is formed in the main body 40 of the protective cover 30. In the protective casing 30, the latched portion 54 of the expandable portion 50 engages with the engaging hole 44 of the main body 40 when the expandable portion 50 is attached to the main body 40, thereby motionlessly securing the expandable portion 50 with respect to the main body ca 40 (see Fig. 7, Fig. 9 and Fig. 10). When the latch portion 54 is disengaged from the engaging hole 44, the expandable portion 50 becomes movable relative to the main body 40, and the expandable portion 50 can be detached from the main body 40 (see FIG. 8).
An engaging hole 44 is formed on the guide portion 42 of the main body 40. On the other hand, a snap-in portion 54 of the expandable portion 50 is located on the inside of the guide portion 42, and engages with the engaging hole 44 on the inside. As shown in FIG. 9, the inclined surface 58 is formed on the snap-in portion 54. over, the inclined surface 48 is also formed on the main body 40. When the sliding part 50 is attached to the main body 40, the sliding part 50 slides in one circular direction relative to the main body 40 (to the right in FIG. 9). In this case, due to the mutual contact between the inclined surfaces 48 and 58, the latched portion 54 passively undergoes elastic deformation and moves to the inner surface of the guide portion 42. When the sliding portion 50 slides further, the latched portion 54 slides along the inner surface of the guide portion 42 and engages with an engaging hole 44. As a rule, the unit and remove the protective cover. The knife should be removed from the trimmer. The mutually opposite front surfaces of the snap portion 54 and the engaging hole 44 are perpendicular to the sliding direction of the expandable portion 50. Therefore, the sliding movement of the expandable portion 50 is prevented, and the extendible portion 50 is fixed relative to the main body 40. Therefore, with the protective casing 30 according to the present embodiment, it is easy to attach the sliding part 50 to the main body 40, without using a tool.
As described above, when the expandable portion 50 is attached to the main body 40, the snap portion 54 slides along the inner surface of the guide portion 42 in an elastically deformed state. In this case, the user experiences a drag force caused by friction. Regarding this issue, in the present embodiment, the attachment direction of the expandable portion 50 is one circular direction (direction D1 shown in FIG. 4), while the latch portion 54 is provided at the end portion in another circular direction (direction D2 shown in FIG. 4) the sliding part 50. Remove the coil and the protective cover with how to remove the coil from the trimmer — nowhere. By selecting this type of construction, it is possible to reduce the distance that the snap section 54 slides along the inner surface of the guide section 42 in an elastically deformed state when the expandable portion 50 is attached to the main body 40. As a result, the distance at which the aforementioned resistance force is tested when the user attaches the expandable portion 50 is reduced, and the damage (deformation or friction) received by the snap-in portion 54 is also attenuated.
The engaging hole 44 is a through hole, and the latch portion 54 is exposed from the outside when engaged therein. Accordingly, it is possible to disengage the latch portion 54 from the engagement hole 44 using a tool such as a screwdriver to press the latch portion 54 externally. Here, the engaging hole 44 is relatively small in size, which allows the passage of a tool, such as a screwdriver, and prevents the passage of the user’s finger. In other words, a design is selected in which the latch portion 54 that is engaged with the engagement hole 44 cannot be pressed and cannot be disengaged from the engagement hole 44 with a fingernail or a user’s finger. Therefore, with the protective cover 30 according to the present embodiment, unless the tool is used, it is not possible to disengage the snap portion 54, and the expanding portion 50 cannot be detached from main body 40.
The recessed portion 56 that the front tip of the tool receives is formed in the snap portion 54. As shown clearly in FIG. 9, the recessed portion 56 is V-shaped in the depth direction and contains a pair of beveled edges 56a, 56b. Here, the pair of beveled edges 56a, 56b are mutually asymmetrical, and the inclined surface 56a, which is located in the direction of detachment of the sliding part 50, is formed larger. By this design, by pressing the latch portion 54 with the tool, the user can easily rest the front tip of the tool at the larger beveled edge 56a and can easily apply force in the other circular direction (direction D2 shown in FIG. 4), which is the direction in which the sliding part 50 is detached.
As shown in FIGS. 9 and 10, a wall portion 46 located inside the engaging hole 44 is formed on the main body 40. The wall portion 46 is opposed to the latched portion 54, which is engaged with the engaging hole 44, through the gap, from the inside. When the latched portion 54 is pressed by the tool and disengaged from the engaging hole 44, the latched portion 54 is in contact with the wall portion 46. over, deformation of the snap portion 54 is prevented by this contact with the wall portion 46. Therefore, even if the latch portion 54 is pressed too hard by the tool, excessive deformation of the latch portion 54 is prevented. The wall portion 46 limits the deformation of the snap portion 54 and thus prevents the snap portion 54 from bending and breaking.
In the present embodiment, the latch portion 54 that is engaged with the engagement hole 44 and the safety rod 64 are located on one side of the user when he is holding the trimmer 10. specifically, the latch portion 54 that is engaged with the engagement hole 44 and the safety rod 64 are located on one side with respect to a plane containing the axis of rotation of the cutting blade 22 and the central axis of the work stand 60. Typically, the user detaches the expandable portion 50 when the trimmer 10 lies on the ground. In this case, if the trimmer 10 is located snap-in portion 54, which is engaged with the engaging hole 44, up, then the snap-in portion 54 can be easily pressed with a tool. If the protective rod 64 is provided on the working stand 60, then depending on the position in which the trimmer 10 is placed, the trimmer 10 rests on the protective rod 64, and the position of the trimmer 10 is unstable. Therefore, in the present embodiment, the latched portion 54, which is engaged with the engaging hole 44, and the safety rod 64, which is provided on the work stand 60, are located on one side. Therefore, even if the trimmer 10 is positioned with the snap-in portion 54 up, the safety rod 64 does not interfere, and the position of the trimmer 10 is also stable. How to remove the coil from the trimmer, press the coil lock and turn the protective one. Therefore, the user can easily perform the task of detaching the sliding part 50.
A specific embodiment of the present idea is described above, but it only illustrates some of the possibilities of the idea and does not limit the points of its claims. The prior art set forth in the claims includes changes and modifications of the specific examples set forth above.
For example, in contrast to the design of the present embodiment, it is also possible to make the snap portion 54 on the main body 40 and to make the engaging hole 44 in the expandable portion 50. over, it is also possible to make the snap portion 54 respectively in the main body 40 and sliding part 50, and make the engaging hole 44 in accordance with the corresponding snap-in portion 54, respectively, in the expandable portion 50 and the main body 40. In addition, fixing the main body 40 and the extendable portion 50 can also use a different locking structure, rather than the snap-in portion 54 and the engaging hole 44. For example, the main body 40 and the sliding part 50 may be fixed by a connecting element, such as a pin or clip. In this case, preferably, the connecting element is designed so that it can be attached without using a tool, but required a tool to detach it.
The technical elements disclosed in the description or drawings may be used individually or in all types of combinations, and are not limited to the combinations set forth in the claims at the time of application. over, the prior art disclosed herein can be used to achieve multiple goals at the same time, or to achieve one of these goals.
1. A trimmer comprising a cutting blade and a protective casing configured to partially close the cutting blade, wherein the protective casing comprises a main body and a sliding part adapted to be removably mounted to the main body, and the sliding part is made without requiring any tool for attaching it to the main body, but requiring at least one tool to detach it from the main body.
2. The trimmer according to claim 1, in which one of the elements including the main body and the sliding part of the protective casing is provided with a snap section, the other of the elements including the main body and the sliding part of the protective casing is equipped with an engaging hole, the engaging hole is adapted to be engaging the snap-in portion from the inside and opening the engaged snap-in portion from the outside, and the engaging hole has a size that allows the passage of the tool, but prevents the passage of a finger.
3. The trimmer according to claim 2, in which the expandable part is adapted to be attached to the main body by sliding in one circular direction relative to the main body and detached from the main body by sliding in the other circular direction relative to the main body, and the snap section is located on the end portion in one the circular direction of the main body or at the end portion in another circular direction of the expanding part.
4. The trimmer according to claim 2, in which one of the elements including the main body and the expandable part of the protective casing is provided with a contact portion configured to contact the snap-in portion from the inside when the snap-in portion is ejected from the engaging hole by a tool.
5. The trimmer according to any one of claims 2 to 4, further comprising a work stand, including a tip on which the cutting blade is located, and a protective rod extending from the work stand and configured to be positioned in front of the user when the user is holding the trimmer, this snap section, engaging with the engaging hole, and the protective rod are located on one side relative to the plane containing the axis of rotation of the cutting blade and the Central axis of the working rack.
6. Protective a casing configured to partially close the cutting blade of the trimmer, comprising a main body and a sliding part, removable fastening to the main body, in which the sliding part is made without requiring any tool for attaching it to the main body, but requiring at least one tool to detach it from the main body.
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