JPH01126994A - Rotary cutter - Google Patents

Abstract

PURPOSE: To prevent injury by an inner blade in the case of erroneous drive in the state of detaching an outer blade base by providing a disengaging means for displacing an inner blade base by the force of energizing in an outer blade direction and detaching a driven part from a drive force transmission part. CONSTITUTION: An outer blade 10 pushes in the inner blade base 14 to which the inner blade 20 is attached against the disengaging means 18. When the outer blade base 9 is detached from a main body case 1 so as to clean a hair storage 8 or the like, the inner blade base 14 is exposed and the force of pushing in the inner blade base 14 through the inner blade 20 disappears simultaneously. Then, the driven part 15 of a drive shaft fitting hole 17 is detached from the drive force transmission part 12 of a drive shaft 11 and only the shaft fitting hole part 16 of the drive shaft fitting hole 17 is fitted to the support shaft part 13 of the drive shaft 11. Even when a drive source 4 is erroneously operated in the state, drive force is not transmitted to the inner blade base 14 and the drive shaft 11 idles. Thus, even when the inner blade 20 is erroneously touched, since the inner blade base 14 is not rotationally driven by the drive force of the drive source 4, safety is secured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a rotary cutter such as a pill remover or a rotary electric shaver.

[Conventional technology]

Pill removers, rotary electric razors, etc. use an outer blade and an inner blade that rotates while contacting the inner surface of the outer blade to cut hairballs, hair, etc. that are introduced through numerous introduction holes provided in the outer blade. It is composed of

The inner cutter base to which the inner cutter is attached is removably fitted to the drive shaft of a motor built into the main body case to which the outer cutter base to which the outer cutter is fixed is removably attached.

The drive shaft and the inner cutter stand are designed to rotate integrally and to allow the inner cutter stand to be attached and removed along the axial direction of the drive shaft. Cut out the part to form an abbreviated peripheral surface, use this tip part as the power transmission part, and make the negative part of the drive shaft fitting hole provided in the inner cutter stand correspond to the cut part. A driven portion consisting of a convex portion is provided. Therefore, by engaging these driven parts and the power transmission linking part, rotation of the inner cutter stand relative to the drive shaft is stopped, and the drive shaft and the inner cutter stand are rotated integrally.

(Problem to be Solved by the Invention) However, in the above-described conventional methods, when the outer cutter stand is removed from the main body case for cleaning etc., the inner cutter stand is fitted and supported by the drive shaft. Of course, due to the weight of the inner cutter stand, its driven part and the power transmission part of the drive shaft are
It remains engaged as before in the used state.

Therefore, if you accidentally drive the motor in such a state, eight of the motors will receive the driving force and rotate, so if your hand or the like accidentally comes into contact with the inner blade, There was a problem that there was a high risk of injury due to the inner blade.

SUMMARY OF THE INVENTION An object of the present invention is to provide a safe rotary cutter that can prevent injury caused by the inner cutter even if the cutter is accidentally operated with the outer cutter stand removed.

[Structure of the Invention] [Means for Solving the Problems] Therefore, the present invention provides a power transmission section provided on a drive shaft of a drive source, and a driven member provided on an inner cutter stand that is detachably fitted to the drive shaft. In a device in which the inner cutter base is rotated and cutting is performed between the inner cutter and the outer cutter provided on the inner cutter base, the outer cutter base to which the outer cutter is fixed is connected to the drive source. The inner cutter base is biased in the direction of the outer cutter when the inner cutter base is attached to the main body case, and the outer cutter base is biased toward the outer cutter when the outer cutter base is removed from the main body case. The present invention is characterized in that an engagement release means is provided for disengaging the driven portion from the power transmission portion by displacing the inner cutter stand.

[Effect]

When the outer cutter stand to which the outer cutter is fixed is attached to the main body case, the outer cutter pushes the inner cutter stand to which the inner cutter is attached against the engagement release means. As a result, the lock release means accumulates force and is held in a state where the inner cutter base is biased in the direction of the outer cutter, and the driven part of the inner cutter base fitted to the drive shaft is driven by the drive shaft. engaged with the transmission section. Therefore, when the drive source is operated, the inner cutter is rotated integrally with the drive shaft through the engagement between the power transmission part and the driven part, so the inner cutter rotates while contacting the inner surface of the outer cutter. , to cut off hairballs, whiskers, etc. that are introduced through the introduction hole of the outer blade. Then, when the outer cutter stand is removed from the main body case to expose the inner cutter stand, the force that was pushing the inner cutter stand through the inner cutter disappears at the same time. Therefore, the inner cutter stand is pushed up against its own weight by the urging force of the engagement release means. Then, the driven part is separated from the power transmission part. If the drive source is erroneously operated in such a state, no driving force is transmitted to the inner cutter stand and the drive shaft idles. In this case, the inner cutter stand may be rotated slightly due to friction with the drive shaft. Therefore, it is safe even if you accidentally touch the inner blade.

〔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 held with one hand, and a lid 2 is removably screwed onto the lower end of the main case. Inside this main case 1 is a battery 3 (see Figure 4).
is built-in, and a switch 5 (see Fig. 3) is operated from the outside of the main body case 1 to supply power from the battery 3.
A drive I4 such as a motor that is supplied via a motor is built-in.

The battery 3 can be inserted into and removed from the main body case 1 with the lid 2 removed. Note that 6 in FIG. 4 is a conductive spring that connects the terminal plate 7 attached to the inner surface of the lid 2 and the cathode of the battery 3.

A concave pill reservoir 8 is provided at the upper end of the main body case 1, and a threaded groove is formed at the upper part of the wall section defining the concave pill reservoir. The outer cutter stand 9 is removably screwed into this thread groove. The outer cutter stand 9 has a substantially cylindrical shape, and an outer cutter 10 that closes the opening of the pill trap 8 is fixed to the tip thereof. The outer cutter 10 is made of a thin metal plate, and the entire surface thereof is provided with a large number of introduction holes 10a for pilling, as shown in FIGS. 1 and 3.

The rotation shaft 4a of the drive source 4 is located at the center of the bottom surface of the pill trap 8'.
@ It is disposed through the pill reservoir 8, and a drive shaft 11 is fitted to this rotating shaft 4a.

As shown in detail in FIG. 5, the drive shaft 11 includes a power transmission section 12 and a support shaft section 1 located on the distal side of the power transmission section 12.
3. The power transmission section 12 has a non-circular shape, and the support shaft section 13 has a cylindrical shape.

An inner cutter stand 14 is removably fitted to the drive shaft 11. That is, this inner cutter base 14 has a drive shaft fitting which has a driven part 15 consisting of a recess that can be attached to and detached from the power transmission part 12, and a shaft fitting hole part 16 which is connected to the driven part 15 and which is detachable from the support shaft part 13. A matching hole 17 is provided. An engagement release means 18 is provided between the inner cutter stand 14 and the drive shaft 11.

This release means 18 urges the inner cutter stand 14 in the direction of the outer cutter 10 when the outer cutter stand 9 is attached to the main body case 1, and when the outer cutter stand 9 is removed from the main body case 1, the The inner cutter stand 14 is moved by the biasing force in the direction of the blade 10.
This is provided in order to displace the driven part 15 along the support shaft part 13 and remove the driven part 15 from the power transmission part 12. In the case of this embodiment, a coil spring is used as the disengagement means 18, and this is housed in the shaft fitting hole 16.
It is provided between the inner end of the hole 16 and the upper end of the support shaft 13.

The upper end of this disengagement means 18 is hooked to a small hole 19 provided in communication with the shaft fitting hole 16 through the green of this hole 19 with WA5. This structure prevents the engagement release means 18 from falling off from the inner cutter stand 14 when the inner cutter stand 14 is removed from the drive shaft 11.

Further, a plurality of inner cutters 20 are attached to the inner cutter stand 14. These inner cutters 20 are each biased by a wire spring (not shown), and thereby are always pressed against the inner surface of the outer cutter 10.

In such a configuration, the inner cutter base 14 can be connected to the drive shaft by fitting the drive shaft fitting hole 17 to the drive shaft 11 and then screwing the outer cutter base 9 into the main body case 1. 1
1 is installed in the normal state. This attachment is shown in detail in FIG. 1, in which the outer cutter 10 pushes the inner cutter base 14 to which the inner cutter 20 is attached against the engagement release means 18.

As a result, the engagement release means 18 made of a coil spring is compressed and accumulates a biasing force, thereby biasing the inner cutter base 14 in the direction of the outer cutter 10 . At the same time, not only is the shaft fitting hole 16 in the drive shaft fitting hole 17 of the inner cutter stand 14 fitted into the support shaft part 13 of the drive shaft 11, but also the driven part 15 is connected to the power transmission part of the drive shaft 11. 12 , and the inner cutter stand 14 is supported by the drive shaft 11 .

The engagement between the driven portion 15 and the power transmission portion 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, switch 5 is turned on.
When the drive source 4 is operated, the inner cutter base 14 is rotated integrally with the drive shaft 11 through the engagement between the power transmission section 12 and the driven section 15, so that the inner cutter 20 and the outer cutter are rotated at the same time. It is rotated while contacting the inner surface of 10. Therefore, by pressing the outer cutter 10 against the surface of the clothing in this state, the pill can be introduced into the introduction hole 10a of the outer cutter 10, and the pill can be cut off by the inner cutter 20.

In this embodiment, since the engagement release means 18 is housed inside the inner cutter stand 14, it is possible to prevent cut-off fluff from becoming entangled with the engagement release means 18 made of a coil spring.

When the outer cutter stand 9 is removed from the main body case 1 in order to clean the pill 8, etc., the inner cutter stand 14 is exposed and at the same time the force that was pushing the inner cutter stand 14 through the inner cutter 20 is removed. disappears. Therefore, the inner cutter stand 14 supports the shaft while resisting its own weight due to the urging force of the engagement release means 18. 113
It is worshiped along the lines.

Then, the driven part 15 of the drive shaft fitting hole 17 is connected to the drive shaft 1.
1, and only the shaft fitting hole portion 16 of the drive shaft fitting hole 17 is fitted into the support shaft portion 13 of the drive shaft 11. This state is shown in FIG. 2 and is similar to a so-called clutch-disengaged state.

Even if the drive source 4 is erroneously operated in such a state, no driving force is transmitted to the inner cutter stand 14 and the drive shaft 11 rotates idly. In this case, the inner cutter base 14 may be rotated slightly due to friction with the drive shaft 11. Therefore, even if the inner cutter 20 is accidentally touched, the inner cutter stand 14 will not be rotated by the driving force of the drive source 4, so safety can be ensured in the event of the above-mentioned misuse.

Further, as shown in FIG. 6, the present invention provides an engagement release means 18 made of a coil spring that is wrapped around the support shaft portion 13 of the drive shaft 11 so that the upper surface of the power transmission portion 12 and the driven portion 15 are wrapped around the support shaft portion 13 of the drive shaft 11.
In this case, it may be installed between the rear end surface of the
The disengagement means 18 has 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 provided without being fixed to either. In addition,
The configuration other than the arrangement of the disengagement means 18 as described above is the same as that of the 11th embodiment described above, so a description thereof will be omitted.

In this second embodiment as well, by attaching the outer cutter stand to the main body case 1, the engagement release means 18 accumulates force, and the driven part 15 of the power transmission part 12 engages with the drive source 4. A state in which the inner cutter 20 can be rotated by the driving force is obtained, and the engagement of the driven part 15 with respect to the power transmission part 12 is achieved by the biasing force stored in the engagement release means 18 by removing the outer cutter stand from the main body case 1. Since the combination can be removed, the intended purpose of the present invention can be achieved.

Furthermore, the present invention may be implemented by disposing an engagement release means 18 made of a coil spring between the lower end of the inner cutter stand 14 and the bottom surface of the fluff layer 8, as shown in FIG. In this case, the lock release means 18 is provided with one end fixed to either the lower end surface of the inner cutter stand 14 or the bottom surface of the pill trap 8, or without being fixed to either. Note that the configuration other than the arrangement of the disengagement means 18 as described above is the same as that of the first embodiment, so a description thereof will be omitted.

In this third embodiment as well, the attachment release means 18 accumulates force by attaching the outer cutter stand to the main body case 1, and the driven portion 15 of the power transmission portion 12 engages to drive the drive source 4. The state in which the inner cutter 20 can be rotated by force is obtained, and the biasing force stored in the disengagement means 18 by removing the outer cutter stand from the main body case 1 causes the driven part 15 to rotate with respect to the power transmission part 12. Since the engagement can be released, the intended purpose of the present invention can be achieved.

Moreover, as shown in FIG.
The opposing portion of the drive shaft 11 and the inner cutter stand 14, for example, the upper surface of the support shaft portion 13 of the drive shaft 11 and the back surface of the shaft fitting hole portion 16 of the drive shaft fitting hole 17 that fits therein. Magnets 18a attached to each.

Each magnet 1 may be formed and implemented with 18b.
The polarities of the opposing surfaces of 8a and 18b are the same, and the magnetic repulsion is used as a force for releasing the engagement between the power transmission section 12 and the driven section 15.

Incidentally, since the above-mentioned configuration is the same as that of the first embodiment, the explanation thereof will be omitted.

In this fourth embodiment as well, the engagement release means 1B accumulates force by attaching the outer cutter stand to the main body case 1, and the driven part 15 of the power transmission part 12 engages to drive the drive source 4. The state in which the inner cutter 20 can be rotated by force is obtained, and the driven part 15 is engaged with the power transmission part 12 by the biasing force stored in the engagement release means 18 by removing the outer cutter stand from the main body case 1. Since this can be removed, the intended purpose of the present invention can be achieved.

Although each of the above-mentioned embodiments has been constructed as described above, in carrying out the present invention, the power transmission section 12 of the drive shaft 11 is configured to have a gear-like configuration with unevenness formed on its outer periphery, and the driven The portion 15 may be formed in the shape of an internal gear having irregularities on its inner circumferential surface. Furthermore, in the present invention, by fitting the power transmission part 12 to the outer periphery of the intermediate part of the rotation shaft 4a of the drive source 4, the part of the rotation shaft on the distal side of the transmission part 12 can also serve as the support shaft part 13. There is no problem.

Furthermore, in each of the above embodiments, the power transmission part is formed by a part that protrudes around the drive shaft, and the driven part that engages with this part is formed by a recess provided in the inner cutter stand, but these can have the opposite configuration. You may do so. Therefore, the following embodiments of the power transmission section and the driven section that engages with the power transmission section are also possible.

For example, a driven part is provided protruding from the outer periphery of the base of the fitting shaft of the inner cutter stand, and a fitting hole into which the fitting shaft is fitted is provided in the drive shaft, and the entrance of the fitting hole is provided. A concave power transmission part that engages with the driven part may be provided in the drive part. In addition, a driven part consisting of a concave groove or a convex part is provided at the back end of the drive shaft fitting hole of the inner cutter base, and the tip of the drive shaft that is fitted into the drive shaft fitting hole engages with the driven part. A mating convex or concave power transmission portion may also be provided.

Furthermore, it goes without saying that the present invention can be applied not only to the pill remover shown in each of the above embodiments but also to a rotary electric shaver.

[Effects of the Invention] As explained above, the present invention prevents the drive force of the drive source from being coupled between the power transmission part of the drive shaft and the driven part of the inner cutter stand when the outer cutter stand is attached to the main body case. In addition, when the outer cutter stand is removed from the main body case, the biasing force stored in the locking release means when the outer cutter stand is installed causes the power to be transmitted from the power transmission section to the inner cutter stand. Remove the part,
Since the driving force of the drive source cannot be transmitted to the inner cutter stand, if you accidentally operate the drive source with the outer cutter stand removed, there is a risk of injury if you accidentally touch the inner cutter. It has the effect of being highly safe.

[Brief explanation of the drawing]

1 to 5 show one embodiment of the present invention, with FIG. 1 being a cross-sectional view of the main part, and FIG. 2 being an exploded perspective view with the outer cutter stand removed. 6 to 8 are sectional views showing essential parts of other different embodiments with the outer cutter stand removed. 10a...Introduction hole, 10...Outer cutter, 9...Outer cutter stand, 4...Drive source, 1...Main body case, 20...Inner cutter, 14...Inner cutter stand , 11... drive shaft, 12...
Power transmission section, 15... driven section, 18... engagement release means. Applicant's agent Patent attorney Takehiko Suzue Figure 1 11';11';-41g1/' Figure 5 6511

Claims (1)

[Claims] An outer cutter base to which an outer cutter having a large number of introduction holes is fixed is removably attached to the main body case with a built-in drive source, and an inner cutter base that is in contact with the inner surface of the outer cutter is attached, and an inner cutter base having a driven part is attached. The blade base is removably fitted to the drive shaft of the drive source, the driven part is engaged with a power transmission part provided on the drive shaft, and the inner blade rotated by the outer cutter and the drive shaft In a rotary cutter that performs cutting with an inner blade of a blade holder, when the outer blade holder is attached to the main body case, the inner blade holder is urged toward the outer blade, and the outer blade holder is biased toward the outer blade. A rotary type, characterized in that it is provided with an engagement release means for displacing the inner cutter base by a force biasing it in the direction of the outer cutter when removed from the main body case, and disengaging the driven part from the power transmission part. cutting device.