JPH0328865Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a reciprocating electric shaver.

[Prior Art] In a conventional reciprocating electric shaver, a drive shaft is integrally provided in the center of a drive unit that engages with an eccentric shaft that rotates eccentrically with respect to the rotating shaft of a motor, and is reciprocated.
An inner cutter mount supporting an inner cutter is swingably attached to the tip of the drive shaft, and the mount is pushed up by a coil spring provided around the drive shaft.

In this electric shaver, the inner cutter is brought into close contact with the inner surface of the outer cutter by the pushing force of the coil spring, and when the motor is driven, the inner cutter is reciprocated together with the drive section via the drive shaft of the drive section. As a result, shaving is performed between the outer cutter and the inner cutter that slides on the inner surface of the outer cutter and reciprocates.

[Problem that the invention attempts to solve]

However, in the past, regarding pushing up and supporting the inner cutter, apart from the drive part, the inner cutter stand, the pin that attaches this stand to the drive shaft, the coil spring, the pin that prevents this spring from coming off the drive shaft, etc. A large number of parts are required. Therefore, there is a problem that assembly is troublesome and there is a high risk of forgetting to attach parts during assembly. Moreover, since the inner cutter is swingable around the drive shaft so that both longitudinal ends thereof can move up and down, force is locally applied to one end of the inner cutter via the outer cutter during shaving. When this happens, the other end of the inner cutter rises and comes into abnormally strong pressure contact with the outer cutter. Such excessive pressure welding accelerates the wear of the outer cutter and causes early breakage of the outer cutter.

[Means for solving problems]

The present invention solves the above problems, effectively prevents the intrusion of beard debris into the razor body, and also provides a razor body with a built-in motor in order to increase the degree of freedom in designing the inner blade drive push-up body. At the same time, the hair cap is fitted into the hair cap mounting groove of the razor body, and an integrated inner blade drive push-up body is attached to the razor body, and this inner blade drive push-up body is connected to the rotating shaft of the motor. a driving part that engages with and reciprocates an eccentric shaft that rotates eccentrically and is located within the razor main body; a pair of fixing parts that are located within the razor main body and are fixed to the main body; A pair of thin flexible deformable parts are provided in the razor main body by integrally connecting both ends of the drive part, and a pair of thin flexible deformable parts are provided integrally in the drive part and protrude out of the razor main body through the hair cover. a pair of flexibly deformable push-up parts that are integrally provided with the pair of fixing parts and located outside the razor body; A fitting part into which the tip of the drive shaft is fitted is formed from an inner cutter mount between the push-up parts, and the inner cutter is attached to the inner cutter mount.

[Effect]

The electric shaver with the above configuration is a single component of an inner blade drive push-up body having an integrated structure, which includes a drive part, a flexible deformation part, a fixed part, a drive shaft, a push-up part, and an inner cutter mounting base, and is directed toward the outer blade. Since the inner cutter is pushed up and supported, the number of parts needed to push up and support the inner cutter can be extremely reduced, assembly is extremely simple, and it is also possible to prevent forgetting to attach parts during assembly. . The reciprocating motion of the drive shaft during use is transmitted to the inner blade mount through the engagement between this shaft and the fitting part, and the movement of this mount is
This is allowed by the flexible deformation of the push-up part that presses the inner cutter against the inner surface of the outer cutter with a moderate force, so the inner cutter can slide on the inner surface of the outer cutter, which allows shaving. can. Moreover, it goes without saying that the movement of the inner cutter in response to external force is possible by the flexible deformation of the push-up part, and even if an external force acts on one end of the inner cutter at that time, It can prevent the end side from rising. Therefore, it is possible to prevent the inner cutter from pressing against the outer cutter with excessive force and causing premature wear and damage of the outer cutter. Furthermore, since the driving part, fixed part, and pair of flexible deformable parts of the inner blade drive push-up body are located inside the razor body, these parts can penetrate the razor body, making it possible for beard debris to enter the razor body. It does not create large pores. Therefore, the hole in the razor body into which the hair cap (through which the drive shaft passes) can be attached can be made smaller, thereby reducing the possibility of hair debris entering the razor body through this hole. Furthermore, the push-up part and the flexible deformation part are responsible for the force that presses the inner cutter against the outer cutter and the flexibility of the flexible deformation part to restrict the movement of the drive part to reciprocating motion. Because it's on,
The pressing force and flexibility can each be set optimally without being restricted by the other.

〔Example〕

An embodiment shown in FIGS. 1 and 2 will be described below.

In the figure, reference numeral 1 denotes a razor body, and this body 1 is formed by connecting a pair of front and rear case members 1a and 1b made of synthetic resin by aligning their opening surfaces together. The main body 1 has a built-in motor 2, as well as a storage battery 3 and a circuit board 4, and a switch knob 5, such as a slide type switch, for operating the motor 2 is attached to the front side of the razor main body 1. It is being

In FIG. 1, one case member 1b
As shown in the figure, both case members 1a and 1b
A partition wall 6 is provided on the upper part of the
Drive unit housing walls 7 are formed respectively. Moreover,
A fixing part mounting groove 8 and a locking claw mounting groove 9 communicating with the fixed part mounting groove 8 are formed on both sides of each drive part storage wall 7, and a cap mounting groove is formed in the ceiling of each drive part storage wall 7. 10 are formed respectively. In addition,
When the case members 1a and 1b are put together, the mounting grooves 8, 9, and 10 are continuous in the front and back, respectively.

A rotating shaft 2a of the motor 2 is provided to pass through the partition wall 6, and a balancer joint 12 having an eccentric shaft 11 whose axis is shifted from the rotating shaft 2a is attached to this shaft 2a.

Further, an inner blade drive push-up body 13 having an integral structure is attached to the razor body 1. This inner blade drive push-up body 13 is an integrally molded product of synthetic resin such as polyacetal, and includes a drive part 14, a pair of fixed parts 16, a pair of flexible deformable parts 17, a drive shaft 18, and a pair of drive shafts 18. push-up part 19 and inner blade mounting base 2
0, and a pair of outer cutter locking pawls 21, which are not necessarily required but are provided in this embodiment to reduce the number of parts.

The drive unit 14 disposed within the razor body 1 is thick-walled and is designed to prevent flexible deformation, and is housed inside the drive unit storage wall 7, with longitudinal and longitudinal sections on the lower surface side. It has an engagement groove 15 extending in a direction orthogonal to the other. The eccentric shaft 11 is fitted into this engagement groove 15 . Further, the drive shaft 18 is integrally provided on, for example, the central upper surface of the drive section 14, and this shaft 18 is connected to the cap mounting groove 10.
It protrudes out of the razor body 1 by passing through a hair cap 22 that is fitted and attached to the razor body 1. In addition, the hair cover 22
is made of a foamed urethane sheet or the like, and although its flexible deformation allows the drive shaft 18 to move, it does not come off from the cap mounting groove 10, and the storage wall 7
The ceiling of the building is now closed.

A pair of fixing parts 1 disposed within the razor body 1
6 is also thick so as not to cause flexible deformation, and is fixed by fitting into the fixing part mounting groove 8. These fixed portions 16 and both ends of the drive portion 14 are integrally connected by a flexible deformable portion 17 disposed within the razor body 1. The pair of flexible deformable parts 17 are thin and are adapted to be flexibly deformed at their upper and lower ends.

The pair of push-up portions 19 are each formed to be thin and flexibly deformable, and are integrally provided with the fixing portion 16 so that the drive portion storage wall 7 outside the razor body 1 Located on both sides.

Further, the inner cutter mount 20 is thick so that it does not undergo flexible deformation, and is integrally provided between the tips of the pair of push-up portions 19. A fitting portion 23 made of a hole or the like is formed in, for example, the central portion of the mounting base 20 in the longitudinal direction, and the tip portion of the drive shaft 18 is fitted into the fitting portion 23 . In addition, attachment holes 24 are formed in the inner cutter mount 20 on both sides of the fitting portion 23, respectively.

An inner cutter 25 is attached to the upper surface of this inner cutter mount 20. In this embodiment, the inner cutter 25 is attached by forming a claw 26 on the inner cutter 25 and locking the claw 26 into the mounting hole 24. It is removable.

Furthermore, the outer cutter locking pawl 21 is integrally provided on the fixing portion 16 and is fitted into the locking pawl mounting groove 9 for attachment. The portion of the claw 21 that fits into the groove 9 can be flexibly deformed, and the claw portion located outside the razor body 1 is thick and cannot be deformed.

Further, 27 in the figure is an outer cutter body consisting of an outer cutter case 28 and an outer cutter 29 that is detachably attached to the outer cutter case 28. This body engages with the outer cutter locking pawl 21, covers the inner cutter 25, etc., and cuts the razor. It is detachably attached to the upper part of the main body 1.

In the above configuration, when the outer blade body 27 is attached to the razor body 1 via the outer blade locking pawl 21, the pair of push-up portions 19 of the inner blade drive push-up body 13
are both slightly flexibly deformed, and as a result, the inner cutter 2
5 is pressed against the inner surface of the outer cutter 29 with an appropriate force.

In this state, when the user operates the switch knob 5 to operate the motor 2, the engaging groove 15 engages with the eccentric shaft 11 that rotates eccentrically with respect to the rotating shaft 2a of the motor 2. , a pair of flexible deformable parts 1
The drive unit 14 is reciprocated with a flexible deformation of 7. At the same time, the drive shaft 18 and the inner blade mounting base 20
By engagement with the fitting portion 23, the inner cutter mount 20 and the inner cutter 25 are reciprocated with flexible deformation of the pair of push-up portions 19. Therefore, since the inner cutter 25 can be slid along the inner surface of the outer cutter 29 as described above, it is possible to cut the whiskers introduced through the many holes (not shown) of the outer cutter 29.

When a push-down force is applied to the entire outer cutter 29 during shaving, the pair of push-up portions 19 are further flexibly deformed, and the outer cutter 29 and the inner cutter 2
5 can be displaced at the same time, and it is possible to prevent shaving in a state where the user's cleats are abnormally bitten into the holes of the outer cutter 29.

Furthermore, when a push-down force is applied to one longitudinal end of the outer cutter 29 and the inner cutter 25 during shaving, the push-up portion 19 on the side where this force is applied is further flexibly deformed, and the outer cutter 29 and the inner cutter 25 can of course be displaced simultaneously. However, at this time, on the other end side of the inner cutter 25, since the inner cutter mounting base 20 and the fixed part 16 are integrally connected by the push-up part 19, the push-up part 19 on the other end side is attached to the inner cutter 25. This serves as a stopper against upward displacement of . Note that since the push-up portion 19 is flexibly deformed, it will not become a stopper until this deformation disappears, but the amount by which the other end of the inner cutter 25 is displaced upward until that point is reached is extremely small. However, it is practically negligible and can be ignored. Therefore, even if an unbalanced load as described above acts, the inner cutter 25 will not be able to move against the outer cutter 2.
It is possible to prevent the outer cutter 29 from being pressed against the outer cutter 9 with excessive force, thereby preventing early wear and damage of the outer cutter 29.

Furthermore, it is possible to reliably prevent beard debris from entering the razor body 1 during shaving. That is, since the drive portion 14, the fixed portion 16, and the pair of flexible deformable portions 17 of the inner blade drive push-up body 13 are located within the razor body 1, these portions do not penetrate through the razor body 1. , there is no possibility of creating a part in the razor body 1 where beard debris may enter.
The drive shaft 18, which is integrated with the drive unit 14, is the part where there is a possibility that beard debris may enter the razor body 1.
This is the part that penetrates the razor body 1, but the drive shaft 18 is small compared to the drive part 14, etc., so the drive shaft 18 is provided in the razor body 1 and attached to the hair cover 22 by allowing movement of the drive shaft 18. Naturally, the hole that is closed by the twisting is also small. Therefore, the possibility that beard debris will enter the razor body 1 through this hole can be extremely reduced.

In addition, when assembling the support and pushing up of the inner cutter 25 in this electric shaver, first, the pair of fixing parts 16 of the inner cutter drive push-up body 13 with the hair cover 22 attached to the drive shaft 18 in advance are assembled. At the same time, the pair of outer blade locking claws 21 are fitted into the fixed part mounting grooves 8 of one case member 1b.
It fits into the locking pawl mounting groove 9 of.

Next, the other case member 1a is replaced with case member 1b.
By covering the member 1a with the fixing part fitting groove and the locking claw attaching groove, respectively, the push-up body 1
It fits into the fixing portion 16 of No. 3 and the portion of the outer cutter locking claw 21 that protrudes from the case member 1b.
Then, the pair of case members 1a and 1b are connected to complete the assembly. Note that the inner cutter 25 may be attached to the inner cutter mount 20 after the above assembly, or may be attached to the inner cutter mount 20 in advance before the above assembly.

As described above, the inner blade drive push-up body 13, which has an integral structure, that is, a single component, is connected to the pair of case members 1a,
Since it is only necessary to insert it between the parts 1b and 1b, the work is extremely simple, and it is possible to reliably prevent forgetting to install it.

In addition, in this electric shaver, as described above, the force pressing the inner cutter 25 against the outer cutter 29 and the drive unit 1
Flexible deformation part 1 for regulating the movement of 4 to reciprocating motion
7, the push-up portion 19 and the flexible deformation portion 17
They are each responsible for this separately. Therefore, the thickness, width, etc. of the push-up portion 19 and the flexible deformation portion 17 can be set without being restricted by each other, and optimal pressing force and flexibility can be obtained for each. Therefore, there is a high degree of freedom in designing the inner cutter drive push-up body 13.Although the above-mentioned embodiment is constructed as described above, in the present invention, at least a portion of the push-up portion 19 is shown in FIG. It may be formed into a bellows shape as shown in FIG.

In addition, when carrying out the present invention, unless it is contrary to the gist of the invention, the drive part, fixed part, flexible deformation part, drive shaft, push-up part, and inner cutter mounting base of the inner blade drive push-up body, It goes without saying that the specific structure, shape, position, etc. of the razor body, motor, eccentric shaft, inner cutter, etc. are not limited to the above-mentioned embodiments, and can be configured and implemented in various ways.

[Effect of idea]

According to the present invention, which has the configuration described in the above-mentioned utility model registration claims, the number of parts related to pushing up and supporting the inner cutter can be extremely reduced, making assembly easy and reliably preventing forgetting to install the above-mentioned parts. At the same time, it is possible to prevent the inner cutter from pressing against the outer cutter with excessive force due to the action of a biased external force, thereby preventing premature wear and damage of the outer cutter. Moreover, since the hole in the razor body to which the hair cover is attached can be made smaller, the possibility of hair debris entering the razor body through this hole can be reduced, and the force pressing the inner blade against the outer blade and the movement of the drive unit can be reduced. The flexibility of the flexible deformable portion for regulating the reciprocating motion is separately borne by the push-up portion and the flexible deformable portion, so that the pressing force and flexibility can be achieved without being constrained by each other. Since each can be set optimally,
There are effects such as a high degree of freedom in designing the inner cutter drive push-up body.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, with FIG. 1 being a partially cutaway front view, and FIG. 2 being a sectional view taken along the line - in FIG. 1. FIG. 3 is a sectional view of essential parts showing another embodiment of the present invention. 1...Razor body, 2...Motor, 2a...
Rotating shaft, 11... Eccentric shaft, 13... Inner blade drive push-up body, 14... Drive section, 16... Fixed section, 17...
...Flexible deformation part, 18... Drive shaft, 19... Push-up part, 20... Inner blade mount, 23... Fitting part, 25
...Inner blade, 10...Hair cover mounting groove, 22...Hair cover.

Claims (1)

[Scope of Claim for Utility Model Registration] A razor body with a built-in motor has a hair lid attachment groove that is fitted with a hair lid, and an integrally structured inner blade drive push-up body is attached to the razor body, and the inner blade a drive part that engages with an eccentric shaft that rotates eccentrically with respect to the rotating shaft of the motor and is reciprocated and is located within the razor main body; a pair of fixing parts fixed to the drive part; a pair of thin flexible deformable parts provided in the razor body by integrally connecting these fixing parts and both ends of the drive part; a drive shaft that penetrates the hair cap and projects out of the razor body; a pair of flexibly deformable push-up parts that are integrally provided with the pair of fixing parts and positioned outside the razor body; and an inner cutter mount having a fitting part between the push-up parts that is integrally provided over the tips of the push-up parts and into which the tip of the drive shaft is fitted, and the inner cutter mount An electric razor characterized by having an inner blade attached to the base.