JPH0212598B2 - - Google Patents

Abstract

The invention relates to a shaving apparatus comprising an external cutting member 3 having a shaving portion 5 formed with hair-entry apertures 4 and an internal cutting member 6 which is rotatable relative to the external cutting member and which comprises cutting elements 8 which extend in an axial direction towards the shaving portion. The internal and external cutting members comprise separate corresponding bearing portions 24, 25; 29, 32; 33, 34, 36; 41, 42 for rotationally supporting the two cutting members 3, 6 relative to each other in the axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises an external cutting member having a shaving portion defining a beard inlet opening, and a cutting member rotatable relative to the external cutting member and extending axially toward the shaving portion. The present invention relates to a shaving device comprising an internal cutting member having an element.

This type of shaving device has a Dutch patent application no.
Known from No. 7217486 (PHN6638). The free ends of the cutting elements of this shaving device contact the inside of the shaving portion of the external cutting member. This poses the problem of making the external cutting member uncomfortably hot due to friction, while also causing unpleasant noise and wear in the contact area during use of the device. Furthermore,
With the known arrangement, the problem is that the clearance between the two cutting members changes depending on the force exerted during shaving, so that the clearance between the cutting members becomes larger for effective shaving action.

It is an object of the invention to alleviate the above-mentioned disadvantages, and for this purpose the invention provides an internal and an external cutting member with separate mating components for mutually rotatable axial support of both cutting members. It is characterized by being provided with a support part.

One embodiment of the present invention is characterized in that both cutting members are supported in the radial direction so as to be mutually rotatable.

Another embodiment of the invention is that both cutting members are provided with flanges that cooperate to form a plain bearing, or that both cutting members are supported for mutual rotation by at least one ball bearing. It is characterized by

Embodiments of the present invention will be described in detail below based on the drawings.

The shaving device shown in FIGS. 1 and 2 comprises a housing 1, in a part of which a holder 2 for three external cutting members 3 is formed. The cutting members 3 are formed with a slit-like barb inlet opening 4, represented by a single line in FIG. 1 and located in the annular shaving portion 5 of each cutting member.

As shown in the cross section of FIG. 2, an internal cutting member 6 is placed inside each external cutting member 3. Each internal cutting member 6 comprises a primarily plate-like body 7 and a cutting element 8 extending axially towards the shaving portion 5 of the associated external cutting member.

Each internal cutting member 6 is connected to an electric motor 13 by a hollow spindle 9, gear wheels 10, 11 and a shaft 12 shown in FIG. 2, so that the internal cutting member can be rotated relative to the associated external cutting member 3. Ru. The gear wheel 10 is attached to the mounting plate 1
It is pivoted on a pin 14 provided at 5. The gear wheel 10 also has a recess 1 that is closed with a cover 17.
form 6. This recess 16 is the hollow spindle 9
It engages the flange 18 at the end of. Flange 18
By making the shape into a non-circular shape such as a rectangle, and making the depression 16 into a shape corresponding to the shape,
A connection is obtained for transmitting rotational movement from the gear wheel 10 to the spindle 9. For the more important part, a spring 19 is placed in the hollow spindle 9 to press it against the gear wheel 10. This causes a force to be exerted on the spindle 9 in the direction of the internal cutting member 6 .
The cylindrical part 20 of the spindle 9 presses against the cutting member 6 and transmits the aforementioned force to this cutting member and via it to the associated external cutting member 3, so that the rim of the external cutting member 3 The upper flange 21 is pressed against the holder 2. The cutting members 3, 6 are pressed inwardly together with the spindle 9 against the action of the spring 19 by external forces such as those occurring during use of the shaving device.

The connection for transmitting the rotary movement of the spindle 9 to the internal cutting member 6 is brought about by engaging the rectangular cross-sectional end portion 22 of the spindle in a corresponding rectangular coupling hole 23 of the cutting member 6.

The connection to the electric motor 13 as described above includes the first,
The three internal cutting members 6 of the device shown in FIG.
It meshes with 1.

In the embodiment shown in FIG. 3, the peripheral portion of the plate-like body 7 of each internal cutting member 6 has a flange
4, which flange contacts a flange 25 on the rim of the associated external cutting member 3. The respective contact surfaces 26, 27 of the flanges 24, 25 constitute plain bearings by means of which the two cutting members 3, 6 are slidably supported relative to each other. The clearance 28 between the face end of the cutting element 8 and the shaving portion 5 can be optimized for effective shaving action. Here, the cutting element 8 and the shaving part 5 do not come into contact with each other, so that there is no wear of these parts;
Also, there is no generation of noise and heating at specific locations on the shaved part as a result of friction. By suitable selection of materials and lubricants, the sliding contact between the contact surfaces 26, 27 of the flanges 24, 25 can be optimized, so that the ends of the cutting elements 8 and the shaving part comprising the bald inlet opening 4 can be This provides a substantially better support structure than that between the internal cutting member 6 and the internal cutting member 6, which reduces the power required to drive the internal cutting member 6.

This also allows the use of stronger compression springs 19, which reduce the risk that the two cutting members will be moved apart by the forces generated during shaving.

In the embodiment shown in FIG. 4, the inner cutting member 6 comprises a hollow cylindrical central boss 29, the end face 30 of which, together with the surface 31 of the central recessed portion 32 of the outer cutting member 3, constitutes a plain bearing.
In general, both cutting members can be centered with respect to each other by providing a small clearance between the ring of the cutting element 8 and the recessed portion 32.

In the embodiment shown in FIG. 5, the two cutting members 3, 6 are also provided with flanges 33, 34, respectively.
The flange 34 is constituted by the outer peripheral portion of a disk 35, and the internal cutting member 6 is fixed to the disk.
A ball bearing 36 is arranged between both flanges.

In the embodiment shown in FIG. 6, the outer cutting member 3 comprises a bottom plate 37 and the inner cutting member 6 is fixed to a journal 38. In the embodiment shown in FIG. A hole 39 for connecting the coupling spindle 9 is formed in the journal 38. Further, an annular disk 40 is attached to the journal 38 so as to be movable in the axial direction.
Spiral groove axial bearings 41 and 42 are arranged between the bottom plate 37 and the internal cutting member 6 and between the bottom plate 37 and the annular disk 40, respectively, while a spiral groove axial bearing 41 and 42 are arranged between the journal 38 and the bottom plate 37, respectively. A grooved radial bearing 43 is arranged. A cup spring 45 is disposed on the flange 44 at the end of the journal 38, and this cup spring engages the helical groove bearings 41, 4.
Press 2 into position.

To prevent soiling or fouling of the helical groove bearing, the ring-shaped raised portions 46, 47 of the internal cutting member 6 and the metal annular disc 40 engage the corresponding grooves 48, 49 of the bottom plate 37, respectively, to form a seal. do. The cut whiskers are removed through the openings 50 in the bottom plate 37.

In addition, for example, only one helical groove bearing may be used instead of the ball bearing of the embodiment shown in FIG. 5, or the plain bearing of the embodiment shown in FIGS. 3 and 4 may be replaced with a helical groove bearing.

In embodiments using plain bearings such as those shown in Figures 3 and 4, the elements required therefor may be separate components such as rings or bushings that are selectively secured to the cutting member.

[Brief explanation of drawings]

1 is a front view of a shaving device with three external cutting members; FIG. 2 is a side view of the shaving device taken in section along the line - in FIG. 1; and FIG.
Figures 6 through 6 are cross-sectional views showing embodiments of internal and external cutting members, respectively. DESCRIPTION OF SYMBOLS 1... Housing, 2... Holder, 3... External cutting member, 4... Beard inlet opening, 5... Annular shaving portion, 6... Internal cutting member, 7... Plate-shaped main body, 8... Cutting element , 9...Hollow spindle, 10, 11...Gear wheel, 12...Shaft, 13...Electric motor, 14...Pin, 15...
Plate, 16... Recess, 17... Cover, 1
8, 21, 24, 25, 33, 34, 44...Flange, 19...Spring, 20...Cylindrical portion, 22...End portion, 23...Rectangular connecting hole, 2
6, 27...Contact surface, 28...Clearance,
29...Central boss, 30...End face, 31...
...Surface, 32...Central depression, 35...Disk, 36...Ball bearing, 37...Bottom plate, 38...Journal, 39...Hole, 4
0... Annular disk, 41, 42... Spiral groove axial bearing, 43... Spiral groove radial bearing, 45... Cup spring, 46, 47
... Ring-shaped raised portion, 48, 49 ... Groove, 5
0...opening.

Claims (1)

Claims: 1. An outer cutting member having a shaving portion forming a beard inlet opening, and an inner portion having a cutting element rotatable relative to the outer cutting member and extending axially towards the shaving portion. a shaving device comprising a cutting member, characterized in that the inner and outer cutting members are provided with separate and matching support portions for mutually rotatable axial support of both cutting members. Device. 2. The shaving device according to claim 1, wherein both cutting members are mutually rotatably supported also in the radial direction. 3. A shaving device according to claim 1 or 2, characterized in that both cutting members are provided with flanges that cooperate to form a plain bearing. 4. The shaving device according to claim 1 or 2, wherein both cutting members are mutually rotatably supported by at least one ball bearing. 5. The shaving device according to claim 1 or 2, wherein both cutting members are mutually rotatably supported by at least one spiral groove bearing.