JP2519759B2 - Rotary cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a rotary cutting device such as a pill removing device or a rotary electric shaver.

[Conventional technology]

The pill remover, rotary electric shaver, etc. are designed to cut the pills, whiskers, etc. introduced from the many introduction holes provided in the outer blade by the outer blade and the inner blade rotated while contacting this inner surface. Is configured. The inner blade base to which the inner blade is attached is detachably fitted to a drive shaft of a motor built in a body case to which the outer blade base to which the outer blade is fixed is detachably attached. The drive shaft and the inner blade base are rotated integrally with each other, and the inner blade base is attached and detached along the axial direction of the drive shaft so that the inner surface of the drive shaft is attached and removed. Part of this is cut away to form a substantially D-shaped peripheral surface, and this tip portion serves as the power transmission portion, and corresponds to the above-mentioned cut portion in the inner part of the drive shaft fitting hole provided in the inner blade base. The driven portion formed by the convex portion is provided. Therefore, the engagement of the driven portion and the power transmission portion prevents the inner blade base from rotating with respect to the drive shaft, so that the drive shaft and the inner blade base are integrally rotated.

[Problems to be solved by the invention]

However, in the conventional case as described above, the inner cutter base is, of course, fitted and supported on the drive shaft when the outer cutter base is removed from the main body case for cleaning or the like. Due to its own weight, the driven portion and the power transmission portion of the drive shaft are maintained in the engaged state as in the use state.

Therefore, when the motor is accidentally driven in such a state, the inner blade base receives the driving force and is rotated, so that the hand or the like may accidentally come into contact with the inner blade, There was a high risk of injury due to the inner blade.

An object of the present invention is to provide a safe rotary cutting device capable of preventing an injury caused by an inner blade when the outer blade base is erroneously driven with the outer blade base removed.

[Structure of the Invention] [Means for Solving Problems] Therefore, according to the present invention, a power transmission unit provided on a drive shaft of a drive source and a driven unit provided on an inner blade base detachably fitted to the drive shaft are provided. The inner blade base is rotated by engagement with the outer blade so that cutting is performed between the inner blade and the outer blade, and the outer blade base to which the outer blade is fixed is the drive source. While urging the inner blade base in the outer blade direction in a state where the outer blade base is attached to the main body case containing the It is characterized in that an engagement releasing means for displacing the inner blade base to disengage the driven portion from the power transmission portion is provided.

[Action]

When the outer cutter base to which the outer cutter is fixed is attached to the main body case, the outer cutter pushes the inner cutter base to which the inner cutter is attached against the engagement releasing means. As a result, the disengagement means stores the biasing force and keeps the inner blade base biased in the outer blade direction, and the driven part of the inner blade mount fitted to the drive shaft is driven by the power of the drive shaft. The transmission portion is engaged. Therefore, when the drive source is operated, the inner blade base is rotated integrally with the drive shaft through the engagement of the power transmission portion and the driven portion, so that the inner blade is rotated while being in contact with the inner surface of the outer blade. , Cut pills, whiskers, etc. introduced from the introduction hole of the outer blade. Then, when the outer cutter base is removed from the main body case to expose the inner cutter base, at the same time, the force pushing the inner cutter base through the inner cutter disappears. Therefore, the inner blade base is pushed up against its own weight by the urging force of the engagement releasing means. Then, the driven portion is separated from the power transmission portion. When the drive source is mistakenly operated in such a state, the drive force is not transmitted to the inner blade base and the drive shaft idles. Therefore, it is safe to accidentally touch the inner blade. Incidentally, it is possible that the inner cutter base is slightly driven to rotate due to the friction with the drive shaft in accordance with the idle rotation.

〔Example〕

Hereinafter, a first embodiment of the present invention will be described with reference to the pill remover shown in FIGS. 1 to 5.

In the figure, reference numeral 1 denotes a main body case of a size that can be grasped with one hand, and a lid 2 is detachably screwed and attached to a lower end portion thereof. A battery 3 (see FIG. 4) is built in the body case 1, and the power of the battery 3 is supplied through a switch 5 (see FIG. 3) operated from the outer surface of the body case 1. A drive source 4 such as a motor is built in. Battery 3 body case 1 with lid 2 removed
It is designed to be attached and detached inside. Reference numeral 6 in FIG. 4 denotes a conductive pressing spring that connects between the terminal plate 7 mounted on the inner surface of the lid 2 and the cathode of the battery 3.

At the upper end of the main body case 1, there is provided a puffball reservoir 8 having a concave shape, and a thread groove is formed at an upper portion of a wall portion which partitions and forms this. Then, the outer cutter base 9 is attached by being detachably engaged with the thread groove. The outer cutter base 9 has a substantially cylindrical shape, and an outer cutter 10 that closes the opening of the pill pool 8 is fixed to the tip portion thereof. The outer blade 10 is made of a thin metal plate and is provided with a large number of introduction holes 10a for pills on its entire surface as shown in FIGS.

The rotary shaft 4a of the drive source 4 penetrates through the central portion of the bottom surface of the pill ball 8 and is arranged in the pill ball pool 8.
A drive shaft 11 is fitted in the shaft. As shown in detail in FIG. 5, the drive shaft 11 is formed to have a power transmission portion 12 and a support shaft portion 13 located on the tip side of the power transmission portion 12. The power transmission section 12 has a non-circular shape, and the support shaft section 13 has a cylindrical shape.

An inner blade base 14 is detachably fitted to the drive shaft 11. That is, the inner blade base 14 has a driven portion 15 that is a recess that is detachable from the power transmission portion 12, and a support shaft portion 13 that is continuous with the driven portion 15.
A drive shaft fitting hole 17 having a detachable shaft fitting hole portion 16 is provided in the. An engagement releasing means 18 is provided between the inner blade base 14 and the drive shaft 11.

The releasing means 18 urges the inner blade base 14 toward the outer blade 10 in a state where the outer blade base 9 is mounted on the main body case 1, and the outer blade base 9 is removed from the main body case 1 when the outer blade base 9 is removed from the main body case 1. It is provided to displace the inner blade base 14 along the supporting shaft portion 13 by the urging force in the direction of the blade 10 to disengage the driven portion 15 from the power transmission portion 12. And, in the case of the present embodiment, the coil spring is used as the engagement releasing means 18,
This is housed in the shaft fitting hole portion 16 and provided between the rear end of the hole portion 16 and the upper surface of the support shaft portion 13.

The upper end of the engagement releasing means 18 passes through a small hole 19 provided in communication with the shaft fitting hole 16 and is hooked on the edge of the hole 19. With this structure, when the inner blade base 14 is removed from the drive shaft 11, the engagement releasing means 18 is prevented from falling off the inner blade base 14.

A plurality of inner blades 20 are attached to the inner blade base 14. Each of the inner blades 20 is biased by a wire spring (not shown), so that the inner blades 20 are constantly pressed against the inner surface of the outer blade 10.

In such a structure, the inner blade base 14 is fitted into the drive shaft 11 through the drive shaft fitting hole 17 thereof, and then the outer blade base 9 is screwed into the main body case 1 to be mounted thereon. It is installed in the proper condition for 11. This mounting state is the first
As shown in detail in the figure, the outer blade 10 is the inner blade base 14 with the inner blade 20 attached.
Is pushed against the disengagement means 18.

As a result, the engagement releasing means 18 made of a coil spring is compressed and stores an urging force to urge the inner blade base 14 toward the outer blade 10. Along with this, not only the shaft fitting hole portion 16 in the drive shaft fitting hole 17 of the inner blade base 14 is fitted to the support shaft portion 13 of the drive shaft 11, but also the driven portion 15 is the power transmission portion of the drive shaft 11. The inner cutter base 14 is supported by the drive shaft 11 by being engaged with 12. These followers 15
The engagement between the power transmission section 12 and the power transmission section 12 creates a state similar to a state in which a so-called clutch is engaged, and power transmission becomes possible.

Therefore, in such a state, the switch 5 is turned on.
When the drive source 4 is operated by operating, the inner blade base 14 is integrally rotated with the drive shaft 11 through the engagement of the power transmission portion 12 and the driven portion 15, so that the inner blade 20 is simultaneously moved to the outer blade. It is rotated while touching the inner surface of 10. Therefore, by pressing the outer blade 10 against the surface of the garment in such a state, the pills can be introduced into the introduction hole 10a of the outer blade 10, and the pills can be cut off by the inner blade 20.

In this embodiment, the disengagement means 18 is housed inside the inner blade base 14, so that it is possible to prevent the cut pills from being entangled with the disengagement means 18 made of the coil spring.

When the outer blade base 9 is removed from the main body case 1 for cleaning the pill pool 8, the inner blade base 14 is exposed and the inner blade base 14 is pushed in via the inner blade 20. The power disappears. Therefore, the inner blade base 14 is pushed up along the supporting shaft portion 13 while resisting its own weight by the urging force of the engagement releasing means 18.

Then, the driven portion 15 of the drive shaft fitting hole 17 is separated from the power transmission portion 12 of the drive shaft 11, and only the shaft fitting hole portion 16 of the drive shaft fitting hole 17 becomes the supporting shaft portion 13 of the drive shaft 11. The mated state. This state is shown in FIG. 2, and a state similar to the so-called disengaged state is created.

Even if the drive source 4 is erroneously operated in such a state, the drive force is not transmitted to the inner blade base 14 and the drive shaft 11 idles.
Therefore, even if the inner blade 20 is accidentally touched, the inner blade base 14 is not rotationally driven by the driving force of the driving source 4, so that safety can be ensured in the case of such misuse. Note that the inner blade base 14 may be slightly rotated due to friction with the drive shaft 11 in association with the idle rotation.

Further, according to the present invention, as shown in FIG. 6, the disengagement portion means 18 made of a coil spring is wound around the support shaft portion 13 of the drive shaft 11 and the upper surface of the power transmission portion 12 and the driven portion 15 thereof. It may be arranged between the rear end face and the rear end face. In this case, the engagement releasing means 18 is provided with one end fixed to either the upper surface of the power transmission section 12 or the rear end surface of the driven section 15, or is not fixed to any of them. Since the configuration other than the disposition of the engagement releasing means 18 is the same as that of the first embodiment, the description thereof will be omitted.

Also in the second embodiment, the engagement releasing means 18 stores an urging force by mounting the outer cutter base on the main body case 1, and the driven portion 15 is engaged by the power transmission portion 12 to drive the drive source 4. A state in which the inner blade 20 can be rotated by force is obtained, and the outer blade base is detached from the main body case 1 to release the engagement.
By the urging force stored in 18, the driven part for the power transmission part 12
Since the 15 can be disengaged, the intended purpose of the present invention can be achieved.

Further, as shown in FIG. 7, the present invention may be implemented by disposing the coil spring disengagement means 18 between the lower end of the inner blade base 14 and the bottom surface of the pill pool 8. . In this case, the disengagement means 18 is provided with one end fixed to either the lower end surface of the inner blade base 14 or the bottom surface of the pill pool 8, or is not fixed to either. Since the configuration other than the disposition of the engagement releasing means 18 is the same as that of the first embodiment, the description thereof will be omitted.

Also in this third embodiment, the engagement releasing means 18 stores an urging force by mounting the outer cutter base on the body case 1, and the driven portion 15 is engaged by the power transmission portion 12 to drive the drive source 4. A state in which the inner blade 20 can be rotated by force is obtained, and the outer blade base is detached from the main body case 1 to release the engagement.
The follower 15 to the power transmission 12 is stored in 18 and is biased.
Can be disengaged, and the intended purpose of the present invention can be achieved.

Moreover, the present invention, as shown in FIG.
Is the facing portion of the drive shaft 11 and the inner blade base 14, for example, the drive shaft 11
Magnets 18a mounted on the upper surface of the support shaft portion 13 and the inner surface of the shaft fitting hole portion 16 of the drive shaft fitting hole 17 that fits with the support shaft portion 13, respectively.
It may also be formed by forming with 18b. Each magnet 18a, 1
The polarities of the opposing surfaces of 8b are the same, and the magnetic repulsive force is used as the disengagement force between the power transmission unit 12 and the driven unit 15. Since the configuration other than the above is the same as that of the first embodiment, the description thereof will be omitted.

Also in this fourth embodiment, the engagement releasing means 18 stores an urging force by attaching the outer cutter base to the main body case 1, and the driven portion 15 of the power transmission portion 12 engages to drive the drive source 4. A state in which the inner blade 20 can be rotated by force is obtained, and the outer blade base is detached from the main body case 1 to release the engagement.
By the urging force stored in 18, the driven part for the power transmission part 12
Since the 15 can be disengaged, the intended purpose of the present invention can be achieved.

Although each of the above embodiments is configured as described above,
In carrying out the present invention, the power transmission portion 12 of the drive shaft 11 is configured to have a gear shape with irregularities formed on the outer periphery thereof, and the driven portion 15 has an internal gear shape having irregularities on its inner peripheral surface. You may form and implement it. Further, in the present invention, by fitting the power transmission portion 12 to the outer periphery of the intermediate portion of the rotation shaft 4a of the drive source 4, the rotation shaft portion on the tip side of the transmission portion 12 also serves as the support shaft portion 13. Does not matter.

Further, in each of the above-described embodiments, the power transmission portion is formed by the portion projecting around the drive shaft, and the driven portion that engages with the power transmission portion is formed by the recess provided in the inner blade base. It may be. Therefore, the power transmission unit and the driven unit that engages with the power transmission unit may have the following modes. For example, a driven portion is provided by projecting to the outer periphery of the base of the fitting shaft portion of the inner blade base, and a fitting hole into which the fitting shaft is fitted is provided in the drive shaft, and the entrance portion of this fitting hole is provided. It may be implemented by providing a concave power transmission portion that engages with the driven portion. In addition, a driven portion composed of a concave groove or a convex portion is provided at the inner end of the drive shaft fitting hole of the inner blade base, and the driven portion is engaged with the tip end portion of the drive shaft fitted in the drive shaft fitting hole. You may implement by providing the convex-shaped or concave-shaped power transmission part which matches.

Further, it is needless to say that the present invention can be applied not only to the pill removing device shown in each of the above-described embodiments but also to a rotary electric shaver.

[Effects of the Invention] As described above, according to the present invention, the driving force of the drive source and the engagement of the driven portion of the inner blade base of the power transmission unit of the drive shaft are engaged when the outer blade mount is attached to the main body case. Can be transmitted to the inner blade base via the power transmission section by the urging force stored in the engagement releasing means when the outer blade base is detached from the main body case. By removing the part so that the driving force of the drive source cannot be transmitted to the inner blade base, if the drive source is accidentally operated with the outer blade base removed, touch the inner blade by mistake. Also, there is no danger of getting injured and there is an effect that the safety is high.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is a sectional view of an essential part, FIG. 2 is a sectional view of the same part with an outer cutter stand removed, and FIG. Fig. 4 is an overall perspective view, Fig. 4 is an overall vertical sectional view, and Fig. 5 is a partial exploded perspective view. FIGS. 6 to 8 are sectional views showing the essential parts of other different embodiments with the outer cutter stand removed. 10a ... Introduction hole, 10 ... Outer blade, 9 ... Outer blade base, 4 ... Drive source, 1 ... Main body case, 20 ... Inner blade, 14 ... Inner blade base,
11 …… Drive shaft, 12 …… Power transmission part, 15 …… Drive part, 18…
... Disengagement means.

Claims (1)

(57) [Claims] 1. An outer cutter base to which an outer cutter having a large number of introduction holes is fixed is detachably attached to a main body case having a built-in drive source, and an inner cutter contacting the inner surface of the outer cutter is attached and driven. An inner blade base having a portion is detachably fitted to the drive shaft of the drive source, the driven portion is engaged with a power transmission portion provided on the drive shaft, and the outer blade and the drive shaft In a rotary cutter that cuts with the inner blade of the inner blade that is rotated, while urging the inner blade in the outer blade direction with the outer blade mounted on the main body case, In the state where the outer cutter base is removed from the main body case, the disengagement means for displacing the inner cutter base by the force urging in the outer cutter direction to disengage the driven part from the power transmission part is provided. Characteristic rotary cutter.