JPS5951310B2 - Hair↓-trimming device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a comb-shaped stationary cutting element and a comb-shaped cutting element movable therewith, each cutting element having a row of teeth, each tooth having an elongated row of teeth. hair-rimming device such as having a cutting blade projecting from the cutting element in a direction extending transversely to the direction of the cutting element, each tooth being arranged to cooperate with a cutting blade of a tooth of the other cutting element; .

Such hair-trimming devices are described, for example, in British Patent Specification No. 1
It is known from No. 507196.

It is known that all hairs that enter the space between adjacent pairs of cooperating teeth in known devices are cut off virtually immediately.

It is an object of the present invention to provide a hair-trimming device that allows the teeth to enter the hair without cutting all of the hair that enters the space between adjacent pairs of cooperating teeth.

In practice, the purpose of the hair-1-rimming device is to be able to cut the hair below the surface while leaving the hair on the surface uncut; It is extremely suitable for

According to the invention, it comprises a comb-shaped stationary cutting element and a comb-shaped cutting element that can be driven relative thereto, each cutting element having a row of teeth, each tooth extending transversely to the direction of extension of the tooth row. In a hair-trimming device having a cutting blade projecting from the cutting element in a direction extending from the cutting element, each tooth being arranged to cooperate with a cutting blade of a tooth of the other cutting element, a driveable element relative to said stationary element; In all positions, two teeth of each pair of cooperating teeth at least partially overlap, a space exists between every two adjacent pairs of cooperating teeth, and at least one cutting element There is provided a hair-trimming device characterized in that the cutting blade of each tooth is formed by a concave portion of the side edge of the tooth.

The lateral edges of the teeth extend transversely to the direction in which each row of teeth extends.

This configuration ensures that during cutting the device has a kind of combined action, which makes it easier for the teeth to enter and ensures that only the hairs that fall into the path of the concave edge portion of the teeth are cut.

According to one embodiment of the hair-trimming device of the invention, the movement of the drivable cutting element takes place at least partially in a direction extending transverse to the direction in which the teeth of this cutting element extend.

As a result, the space between adjacent pairs of cooperating teeth remains fairly large.

Preferably, the drivable cutting element reciprocates in a direction parallel to the direction in which the teeth of the element project from the element, and the two teeth of each pair of cooperating teeth substantially coincide.

This creates an optimal space between adjacent pairs of teeth, which is extremely favorable for the combing action.

Preferably, one or each side edge of each tooth of the stationary cutting element has a concave portion forming a cutting blade.

A preferred embodiment of the hair-trimming device of the present invention provides that the or each cutting blade of each tooth of the stationary cutting element extends transversely to the direction in which the tooth projects from the cutting element, and the or each cutting blade of the driveable cutting element extends transversely to the direction in which the tooth projects from the cutting element. The cutting blade is characterized in that it is located at the distal end of the tooth and extends transversely to the direction in which the tooth projects from the cutting element.

The distance measured between the cutting blades of two teeth of a pair of cooperating teeth at every predetermined position of the drivable cutting element relative to the stationary cutting element and measured in the direction in which the teeth project from the cutting element is The distance between the cutting blades of the two teeth of one pair of teeth is different.

This reduces the number of bristles that are cut simultaneously at any given time and thus reduces the peak load on the drive motor.

Another embodiment of the hair-1 rimming device of the present invention provides that each cutting element comprises two rows of teeth, the first row of teeth being oriented substantially parallel to the direction of reciprocation of the drivable element. and the second row of teeth is characterized in that it extends in a direction substantially perpendicular to the direction of reciprocation of the drivable element.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The hair-trimming device shown in FIG. 1 includes a housing 1 consisting of two halves 2 and 3. The hair-trimming device shown in FIG.

This housing houses an electric drive motor (not shown).

The device also includes a stationary comb-like cutting element 4 and a comb-like cutting element 5 cooperating therewith and driveable by a motor.

These cutting elements are provided with tooth rows 6 and 7, respectively, which are arranged together near one end of the housing such that both tooth rows project from the housing.

The elastic device for pressing the cutting elements 4 and 5 elastically against each other consists of four leaf springs 8, which form part of a single part 9.

The cutting elements 4 , 5 located inside the housing 1 are covered by a flap 10 hinged to the housing part 2 .

As shown in FIG. 2, the stationary cutting element 4 is positioned by a projection 2 on the housing part 3, and the cutting element 4 has a hole 11 on the projection 12 at the front of the cutting element. impinges on the rim 13 of the housing part 3.

The drivable cutting element 5 is movable relative to the stationary cutting element 4 in the direction of the teeth, ie in the direction indicated by the arrow P, the teeth 6 and 7 projecting from the cutting element in said direction.

The cutting element 5 is guided during this movement by a projection 12 which engages in a sliding fit in a bore 14 in the cutting element 5.

The size of the hole 14 in the tooth direction P is slightly larger than that of the protrusion 12.

Furthermore, the two cutting elements have support surfaces 15,16.

The cutting elements are in sliding contact with each other at teeth 6.7 and at support surfaces 15.16.

The drivable cutting element 5 is driven via a drive lever 17 to reciprocate in a direction parallel to the tooth direction P.

The drive lever itself is oscillated by a motor in a direction transverse to the tooth direction P.

Since the desired interlocking of the cutting element 5 is substantially perpendicular to the movement of the drive lever 17, the cutting element 5 has a slot 19;
This extends obliquely to the tooth direction P, and a pin 18 of the drive lever is slidably fitted into this slot.

Figures 3 and 4 show teeth 6 and 7, respectively, on an enlarged scale.

The two side edges of each tooth 6 of the stationary cutting element 4 form a triangular recess 20 .

Each side edge of each tooth 6 thus has a recessed corner 21 which forms part of the boundary of the recess 20 and which constitutes the cutting edge of the tooth.

In the embodiment of FIG. 3.4, each cutting blade 21 is perpendicular to the tooth direction P.

Each tooth 7 of the drivable cutting element 5 has a cutting blade 22 at its distal end.
, which cooperates with the two cutting edges 21 of the teeth 6 of the stationary cutting element 4 .

The cutting blade 22 is perpendicular to the tooth direction P.

In this example, two teeth of each village of cooperating teeth 6 and 7 are matched.

During the movement of the cutting element 5, the distance between each adjacent pair of cooperating teeth remains constant, so that the space between the two pairs of teeth remains large enough to ensure a satisfactory combing action. , which is necessary for the hair to enter the toothed cutting element.

In operation, the cutting element has a diluting effect on the hair, which occurs during the reciprocation of the cutting element 5 between the position shown in solid lines and the position shown in dashed lines 23 in FIG.
This is due to the fact that only the hair that is trapped within the recess 20 is cut, although the end of the hair is shown in a forward position.

Generally, the number of hairs that are cut will be only a fraction of the total number of hairs that will enter the space between the pairs of teeth.

The square portion of the tooth constituting the cutting blade can be obtained by a method other than forming a triangular recess on the side edge of the tooth; in fact, it can be obtained by forming a recess of any shape on the side edge of the tooth. can.

The mode of movement of the drivable cutting element can also be other than pure reciprocation in the tooth direction P.

As a hair thinning device, at every position of the cutting elements relative to each other, a space of sufficient width is left between adjacent pairs of teeth;
It is important that the hair enters these spaces, ie that the combing action is continuous.

Figure 5a. b, c, a, e, f,
g and y indicate different configurations of the cooperating tooth pairs, and the arrow indicates the direction of movement of the drivable cutting element in each case.

The cutting blades are given the same reference numerals as in FIG.

FIG. 5a shows a pair of cooperating teeth 6 and 7, in which each side edge of the stationary tooth has a recessed portion 21 extending obliquely to the tooth direction P to form a beveled cutting edge.

This corner of the mouth is formed by cutting an inclined slot in the side edge of the tooth 6.

The movable tooth 7, which in this embodiment reciprocates in a direction parallel to the tooth direction P, has two inclined cutting blades 22 at its distal end to cooperate with each of the two cutting blades 21 of the fixed tooth 6. .

The direction and inclination of each cutting blade 22 are the same as those of the cooperating cutting blade 21.

Figure 5b shows a configuration similar to that shown in Figure 5a, but
The difference is that the teeth 7 move in a direction transverse to the tooth direction P.

The arrows indicate two different modes of reciprocation.

FIG. 5C shows that the fixed teeth 6 of a pair of cooperating teeth 6 and 7 have a cutting edge only on one side of the teeth, and the cutting edge has a concave corner portion 2 on the side edge of the teeth.
1, this part extends perpendicularly to the tooth direction P and shows a configuration formed by reducing the width of the tooth.

The movable tooth 7 has a cutting blade 22 at its end for cooperating with the cutting blade 21 of the fixed tooth 6, and in this embodiment makes a rotational movement as indicated by the dashed arrow during operation.

The cutting blade 22 also extends perpendicularly to the tooth direction P.

Figure 5d shows a configuration similar to that shown in Figure 5C, but
The difference is that the movable blade 7 has a reciprocating motion instead of a rotating action.

FIG. 5e shows a configuration in which the fixed tooth 6 and the movable blade 1 have a cutting blade only on one side of the tooth.

The arrows indicate two possible modes of reciprocation.

Figure 5f shows a pair of cooperating teeth 6 and 7, in which one side edge of each tooth has a square section 21 and 22, respectively, forming a cutting edge.
have.

The recessed corner portion 21 is formed by a part of the boundary of the recess on the side edge of the tooth 6, and the reentrant corner portion 22 is formed by a reduction in the width of the tooth 7.

The movable tooth 7 reciprocates in a direction parallel to the tooth direction P, and the two cutting blades 21 and 22 extend obliquely to this direction.

Figure 5g shows an arrangement in which each tooth of a pair of cooperating teeth 6 and 7 has two cutting edges on each side of the tooth.

The cutting blade 21 of the fixed tooth 6 is formed by a concave corner portion 21 on the side edge of the tooth, and extends obliquely to the tooth direction P, and the cutting blade 22 of the movable tooth 7 extends at right angles to the tooth direction P. .

The teeth 7 reciprocate in a direction parallel to the tooth direction P.

In the configuration shown in Figure 5h, each tooth of the pair of cooperating teeth 6 and 7 has two cutting blades on each side of the tooth similar to that in Figure 5g, but all cutting blades are Extends perpendicular to direction P.

The movable tooth 7 reciprocates in a direction parallel to the tooth direction P.

Figures 6a, 1) and c show an arrangement in which the drive cutting element 24 performs a rotational movement.

The cutting element 24 is formed at the ends of the spindles 27 and 28.
It is driven via two synchronously rotating eccentric pins 25,26.

These spindles pass through openings in the stationary cutting element 29 and are driven by a motor spindle 32 via two sets of bevel gears 30 , 31 .

FIG. 6d shows the path of movement of a point A on the tooth 33 of the drivable cutting element.

Reference numeral 34 designates cooperating teeth of the stationary cutting element.

The configuration of these teeth is similar to that in Figure 5C.

If the hair is cut simultaneously by multiple pairs of teeth,
High peak loads occur on the motor and the motor power must be adapted to this.

This high peak load was measured in the tooth direction P between the cutting edges of the two teeth of a pair of cooperating teeth at a given position of the drivable cutting element relative to the stationary cutting element. Avoidance can be reduced or reduced by arranging the distances to be different for a number of both lights.

FIG. 7 shows an example of this.

The distance a between the cutting edges 35 and 36 of the teeth 6 and 7 of each village of cooperating teeth is made larger than the corresponding distance of the adjacent pair of teeth on the side closer to the center of the tooth row (al < a2 <. ...
・・・・・・＜a5〈・・・・・・・・・）.

To do this, the cutting blades 35 are arranged in a staggered position along the row of teeth 6 from the center of the row to its ends so that they approach the distal ends 37 of the teeth.

Alternatively, it is also possible to shift the position of the cutting blade 36.

The exploded perspective view of FIG. 8 shows a hair-trimming device in which each cutting element 4, 5 has two rows of teeth.

On the sides 42 and 43, the cutting element is provided with a first row of teeth 6 and 7 as described for the embodiment of FIGS.

These teeth 6 and 7 project from the cutting elements 4 and 5, respectively, in a direction substantially parallel to the direction of movement of the movable cutting element 5.

On the sides 38 and 39 of the cutting elements 4 and 5 are located a second row of teeth 40 and 41, respectively.

These teeth 40 and 41 project in a direction substantially perpendicular to the direction of movement of the movable cutting element 5 .

When the movable cutting element is activated, the rows of teeth 40 and 41 act as teeth of a conventional trimmer and can thus be used for both thinning and trimming operations of the device.

Obviously, the hair-trimming device can also be constructed as part of other types of body care appliances, such as shaving devices or pine-surgery devices.

[Brief explanation of the drawing]

1 is a perspective view of the frontmost part of a hair-trimming device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the hair-trimming device of FIG. 1, and FIG. 3 is a perspective view of the hair-trimming device of FIG. 1. An enlarged view of several pairs of cooperating teeth of the device, FIG.
Cross-sectional view taken on the line IV-IV of the figure, Figure 5 a-z
h shows another pair of cooperating teeth; FIG. 6a is a schematic representation of a cutting element of a hair-trimming device according to another embodiment of the invention, in which the drivable cutting element has a rotational movement; Figures 6b and 6c are views taken at right angles to each other.
FIG. 6d is an enlarged view of the two cooperating teeth of the cutting element of FIG. 6a; FIG. 7 is a schematic cross-sectional view of the cutting element of FIG. 6a; FIG. 5 shows a part of a cutting element in which the distance between the cutting blades of two pairs of cooperating teeth in a given position of the drivable element differs from this distance in other pairs of teeth; FIG. 8 shows a hair-trimming device according to another embodiment of the invention, similar to FIG. 2, in which each cutting element has two rows of teeth. 1... Housing, 2, 3... Half part,
4... Fixed cutting element, 5... Driveable cutting element, 6, 7... Teeth, 10...
Flap, 12... Protrusion, 13...
Rim, 15, 16...Support surface, 17...
...Drive lever, 18...Pin, 19...
...Slot hole, 20...Triangular recess, 21...
... Concave corner part, 22 ... Cutting blade, 24 ...
... Drive cutting element, 25.26 ... Eccentric pin, 29 ... Stationary cutting element, 32 ... Motor spindle, 35, 36 ... Cutting Blade, 40
,41...teeth.

Claims (1)

[Claims] 1. A comb-shaped stationary cutting element and a comb-shaped cutting element that can be driven relative to the comb-shaped cutting element, each cutting element having a row projecting from the cutting element in a direction transverse to the direction in which the teeth extend. In a hair-trimming device such as a hair-trimming device having a cutting blade with teeth of the other cutting element, each tooth being arranged to cooperate with the cutting blade of the teeth of the other cutting element, any position of the driveable cutting element relative to the stationary cutting element. two teeth of each pair of cooperating teeth at least partially overlap each other, a space exists between every two adjacent pairs of cooperating teeth, and at least one of the cutting elements A hair-trimming device characterized in that the cutting edge of each tooth is formed by a concave portion of the side edge of the tooth. 2. Hair-trimming device according to claim 1, characterized in that the movement of the drivable cutting element takes place at least partially in a direction extending transverse to the direction in which the teeth of the cutting element extend. 3. Claim characterized in that the drivable cutting element is reciprocatable in a direction parallel to the direction in which the teeth of said cutting element project therefrom, the two teeth of each pair of cooperating teeth substantially coincident. The hair trimming device according to claim 1 or 2. 4. A hair-trimming device according to any one of claims 1 to 3, characterized in that one or each side edge of each tooth of the immovable cutting element has a concave portion constituting a cutting blade. 5. The or each cutting blade of each tooth of the immovable cutting element extends transversely to the direction in which the tooth projects from the cutting element, and the or each cutting blade of each tooth of the drivable cutting element is located at the distal end of the tooth. 5. A hair-trimming device according to any one of claims 1 to 4, characterized in that the teeth extend transversely to the direction in which they project from the cutting element. 6. The distance, measured in the direction in which the teeth project from the cutting element, between the cutting blades of the two teeth of a pair of cooperating teeth in all predetermined positions of the drivable cutting element relative to the stationary cutting element cooperates. 6. Hair-trimming device according to claim 1, characterized in that the distance between the cutting blades of the two teeth of one pair of teeth is different. 7 Each cutting element comprises two rows of teeth, the first row of teeth extending in a direction substantially parallel to the direction in which the drivable element reciprocates, and the second row of teeth extending in a direction substantially parallel to the direction in which the drivable element reciprocates. Hair-trimming device according to claims 1 and 2, characterized in that it extends in a direction substantially perpendicular to the direction of movement.