RU2470563C2 - Epilatory head for epilator with tweezers for pulling out - Google Patents

Abstract

FIELD: personal use articles.

SUBSTANCE: present invention relates to an epilatory head for epilator with tweezers for pulling out designed for removing hairs. The object of the invention is to create an epilator comprising the epilatory head with tweezers for pulling out, which has a simpler design, and which is reliable in operation. The epilatory head of the epilator with tweezers for pulling out is actuated by an electric motor. The said epilatory head comprises a drum (1a) made with the ability to rotate about its longitudinal axis. The drum comprises at least one row of peripheral tweezers for pulling out. Each of the tweezers is formed by at least one movable blade (5) alternately interacting with the opposite support surface for gripping the hair, and then releasing them. The hollow frame (10a) on which the tweezers for pulling out are mounted, is located coaxial with the central shaft (12a) comprising at least one groove (14) of the cam (15a), which forms a guide channel for the movable blade (5) during the rotational movement of the frame (10a) relative to the central shaft (12a). The longitudinal peripheral partition (17a) is installed from the top of the row (2) of tweezers for pulling out and comprises an opening (18) through which the movable blade (5) passes. According to the invention, the said opening (18) is limited from one side with the radial wall (7) which forms a support surface for the movable blade (5) during its reciprocating motion.

EFFECT: creation of epilator comprising epilatory head with tweezers for pulling out with a simpler design, and which is reliable in operation.

13 cl, 7 dwg

Description

Technical field

The present invention relates to an epilator head for an epilator with pulling forceps designed to remove unwanted hairs on a human body that can be held in a hand.

State of the art

This type of epilator contains, as a rule, tweezers in the form of blades or disks placed on a rotating drum, and the tweezers are periodically brought into a closed and open position in order to capture hairs near the skin to pull them out by rotating the drum and, accordingly, to remove torn hairs.

Epilators with tweezers for pulling formed by movable blades, which, rotating around an axis, interact with fixed blades, with tweezers mounted on a rotating cylinder, known, for example, from document WO 2006/037392. At the same time, this apparatus needs to operate each blade, which makes the structure complicated and difficult to assemble.

US 2005/0101971 describes another type of epilator in which the tweezers for pulling are formed by a plurality of rows of movable blades that perform translational movements and abut against motionless mounted opposite to the blade, all movable blades of one row mounted on the peripheral shuttle of the rotating cylinder. Each shuttle contains protrusions which, when brought into rotation by the shuttle around the central axis, interact with a cam containing grooves made on the periphery of the fixed central shaft. Shuttles are located around the shaft with cams, having the ability to move along the axis of this shaft, however, they will be blocked in the radial direction by intermediate connecting elements. To assemble the rotating cylinder, the shuttle holding shaft slides along the first connecting elements of the radial holding of the shuttles, then the fixed blades are inserted one after the other into the first connecting elements in order to subsequently impart a sliding movement along the axis of the second connecting elements, which prevent the radial movement of the fixed blades . The structure thus obtained is then rigidly connected by axial screw fastening. This device, having a generally simpler design than the previous device, also needs numerous structural parts, as well as connecting elements, which are inserted and assembled alternately by sliding movement in the axial direction, which makes such an assembly labor-intensive.

FR 2858528 proposed an improved solution, according to which two movable blades of the same row are joined together by means of their bases, comprising a protrusion that makes passes along the cam groove made around the circumference of the stationary central shaft. The movable blades of one row are mounted on a rotating peripheral frame and make reciprocating movements, moving in the axial direction in front of the supporting blades located opposite. Two adjacent supporting blades are connected together and held with the possibility of sliding in a slot made in the base of the assembly formed by two movable blades. Two assemblies of movable and support blades are mounted one after another, alternating with central movable blades, all elements being held in the radial direction by means of an external partition. Although the design is simpler than the device described in the previous document, the retractable arrangement of the support blades causes jamming during operation, as well as the mutual penetration of the movable blades, there is a certain dispersion of the forces applied at the level of the clamping surfaces.

Summary of the invention

The present invention is to eliminate at least partially the above-mentioned disadvantages by creating an epilator containing an epilator head with tweezers for pulling, having a simpler design, which would remain reliable during use.

Another objective of the invention is the creation of an epilator containing an epilator head with a reduced number of components, which allows for automated assembly.

Another object of the invention is to provide an epilator containing an epilator head with tweezers for pulling, which can reduce the pain experienced when pulling, ensure a stable quality of hair removal during the entire period of its operation and allow it to be produced in large quantities and at a low price.

These tasks are achieved by using an epilator head for an epilator with pulling tweezers, driven by an electric motor containing a drum configured to rotate around its longitudinal axis, the drum contains at least one row of peripheral tweezers for pulling, each tweezers formed at least one movable blade, alternately interacting with the opposite supporting surface for gripping the hairs, and then releasing them, a hollow frame on which new tweezers for pulling located coaxially with the central shaft containing at least one cam groove forming a guide channel for the movable blade during the rotational movement of the frame relative to the central shaft, and a longitudinal peripheral partition mounted on top of a number of tweezers for pulling and containing an opening through which the movable blade passes, while the hole is bounded on one side by a radial wall forming a supporting surface for the movable blade during reciprocation.

Thus, the epilator head contains a rotating drum with peripheral movable blades, the lower part of which (opposite to their pulling edges) passes along the axial groove of the cam made on the central shaft, which entails a reciprocating movement in the axial direction of the movable blade in the time it rotates around the central shaft relative to the opposite supporting surface.

According to the invention, the opposite supporting surface is the radial wall of the hole of the longitudinal peripheral septum, which covers a series of movable blades located on the frame, coaxial with the Central shaft. The term "radial wall" refers to a wall containing a surface that borders in a radial plane with a rotating drum. The radial walls of the partition are dimensioned so that they have, on the one hand, a contact zone with the movable blade, the dimensions of which would be equivalent to the dimensions of the latter, and, on the other hand, have sufficient strength to withstand the load transmitted by the movable blade application to the wall in order to tear out hairs. Thus, the radial walls are made in the form of a structural element monolithic with a partition to facilitate the practical implementation and especially the assembly of the epilator head. Such a monolithic element can be made of the same plastic material or of two materials, for example, the walls forming the supporting surfaces can be made of metal, and then molded with a partition.

All supporting surfaces of one row are made in the form of one part with a partition of the structural element, and the assembly of the epilator head is greatly simplified. Moreover, when installing movable blades of one row on the outer surface of the hollow frame, they pass through it until their base begins to interact with the cam groove of the central shaft; however, the assembly of one row of blades is held in the radial direction by means of a longitudinal peripheral partition, which is made in the form of a single structural element with supporting blades and covers the assembly, while relying on the frame.

Preferably, two movable blades of the same row are joined together at their base, which contains a common protrusion extending along the groove of the cam.

This allows you to further simplify both the design and installation of the epilator head, and the row may contain one or many groups of two monolithic movable blades. Moreover, such an assembly of monolithic movable blades connected in the longitudinal direction is better guided during their movement parallel to the longitudinal axis of the drum along the corresponding guide provided in the walls of the frame.

Preferably, the movable blade is mounted obliquely with respect to the radial wall.

This arrangement at a certain angle to the radial plane of the drum allows you to have linear contact with the support wall, providing a better grip of the hair. Moreover, movable blades are made of a metal sheet by cutting, and then changing the shape of the parts along the edges. The movable blades, which are inclined relative to their base, have a certain flexibility that allows them to deform when they begin to abut against a solid wall to make effective contact, ensuring the capture of the hair without cutting it off.

Preferably, the cam comprises a part forming a movable cam, which is mounted by means of a compensating spring inside the central shaft.

Such a flexible compensating means is provided for applying axial force to the cam and thereby correcting clearances due to machining tolerances during installation and wear of parts during movement, in particular at the level of the cam grooves. These flexible means provide, in addition, good pulling of hairs even in the case of using rigid movable blades.

Preferably, the epilator head comprises a plurality of peripheral rows, wherein the blades of each row are offset in the circumferential direction of the drum.

The blades displaced on the circumference of the drum similarly allow you to shift the pulling zone and thus have fewer simultaneously working tweezers, which reduces the pain experienced during the pulling procedure.

Preferably, the epilator head comprises two cams mounted one after the other on the central shaft, each cam having at least one groove in which the protrusion of the movable blades extends.

The cam contains at least one peripheral tortuous groove, which provides axial reciprocating movement of the movable blades passing through this groove. Two cams, installed one after the other, thus allow you to have many tweezers working in a wider area of hair removal with greater efficiency.

Preferably, the grooves of one cam approach the grooves of the other cam in the forceps closing control zone.

This makes it possible to achieve simultaneous closure of blades of one row controlled by two different cams, the applied force of which is balanced inside the assembly forming the epilator head.

Preferably, the partition is made of plastic material.

Thus, this partition, having complex shapes, is made of plastic material in an economical way using injection molding technology.

Preferably, the plastic material is ABS plastic (acrylonitrile butadiene styrene).

Preferably, the thickness of the radial wall is at least 1 mm to provide sufficient strength to withstand the supporting force of the movable blade, which is approximately 3 N.

Preferably, the drum is held by a support comprising two side flanges, which is removably mounted relative to the engine housing.

The assembly of the rotating drum is held on the engine housing by means of side flanges and removable fastening means, which allow replacing with another head for hair removal or depilation (cutting hairs, exfoliating, etc.).

The objective of the invention is also solved by creating an epilator containing a housing that is designed to hold it in the hand, and containing an electric drive and an epilator head according to the invention.

Brief Description of the Drawings

The invention is further explained in the description of the preferred embodiments with reference to the accompanying drawings, in which:

figure 1 depicts a General view of the rotating drum of the epilator head according to the first embodiment of the invention, and for clarity, only one row of tweezers for pulling is shown;

figure 2 is a longitudinal section in a plane passing through the middle of a series of tweezers shown in figure 1;

figure 3 is a side view of a rotating drum, and for clarity, some of the constituent elements are removed;

figure 4 is a General view shown in figure 1 of a rotating drum in parsing;

5 is a general view of the epilator head according to the second embodiment of the invention, with only one row of tweezers being pulled out for clarity;

Fig.6 is a view of a longitudinal section made in a plane passing in the middle of a series of tweezers shown in Fig.5;

Fig.7 is a General view shown in Fig.5 epilator head in the analysis.

DESCRIPTION OF PREFERRED EMBODIMENTS

Figures 1-4 show a rotating drum 1a of an epilator head according to a first embodiment of the invention. The rotary drum 1a further comprises side flanges similar to the side flanges (47, 48) shown in FIGS. 5-7, which define an epilating hole in their upper part that provides tweezers for pulling out the rotary drum 1a. Side flanges are equipped with fasteners in the upper part of the epilator motor housing. The motor housing, as a rule, contains a hollow housing made of plastic material, made to hold it in the hand, moreover, an electric motor and a gear block are placed in the housing, transmitting a rotation movement about its longitudinal axis X-X to the rotating drum 1a of the epilator head.

The rotary drum 1a comprises a plurality of rows of 2 tweezers for pulling, preferably six rows, uniformly distributed around its circumference. To provide a better understanding, FIGS. 1-4 show only one row of 2 tweezers. Rows of tweezers 2 for pulling contain movable blades 5 located on the hollow frame 10a, and movable blades cooperate with opposed supporting surfaces, as will be explained later.

As shown in FIGS. 3 and 4, the frame 10a has a cylindrical shape inside and, as a rule, the shape of a hexagonal prism with six rectangular sides 20. Each side 20 is delimited at the level of its ribs by parallel vertical partitions 21, each of which has a rib 22 oriented inwardly to side 20. The landing site 23 for the movable blades 5 is thus defined on each side 20 between the ribs 22 and the base 25 of side 20. At the base 25 of each side 20, a through cutout 24 is made allowing the bottom of the movable blades 5th to pass through the frame 10a in the direction of the Central shaft 12a. The frame 10a is made of a plastic material, for example, ABS plastic, using injection molding technology. The frame 10a is rigidly connected to one of its lateral sides with the gear 30 and, preferably, is made as a unit with the last element by performing a similar injection molding operation. The continuation of the ribs of the frame 10a, located against the gear 30, are the pins 31, each of which is designed to be installed in the hole 32 of the gear wheel 33 when assembling the rotating drum 1a.

The movable blade 5 has a T-shaped cross-section (Fig. 3), which also shows the frame 10a with its gear 30, the central shaft 12a in profile, the movable blade 5 mounted on the frame 10a. Two movable blades 5 located side by side and belonging to the same row 2 are connected at their base by means of a cross member 27 forming a monolithic part 29 having, as a rule, a U-shape (Fig. 4). The movable blades 5 and the cross member 27 are preferably made by cutting and bending a steel sheet having a thickness of about 0.3 mm. Two movable blades 5 are parallel to each other and mounted at an angle of about 9 ° relative to a vertical plane perpendicular to the cross member 27 in the direction of the supporting surfaces, as will be explained later. The longitudinal edges 28 of the cross member 27 are raised in the direction of the upper part of the movable blades 5 and are designed to be placed at the landing site 23 of the frame 10a and held by ribs 22. The base of the element contains a protrusion 16, which is fixed, for example, by riveting in the center of the cross member 27 and located perpendicular to the cross and oriented outward. After the monolithic part 29 is installed on the side 20 of the carcass 10a, the protrusion 16 passes through the notch 24 of the base 25 of the side in the direction of the Central shaft 12a.

The central shaft 12a is generally cylindrical in shape, with the outer diameter of the central part being smaller than the inner diameter of the frame 10a. The ends 11 of the shaft 12a having the smallest diameter form a rotation support for the gear 30 and, respectively, of the gear wheel 33, the ends 11 being fixedly mounted in the side flanges of the epilator head, which, in turn, are also fixedly mounted relative to the apparatus body. The central shaft 12a comprises a cylindrical cam 15a comprising a plurality of circumferential grooves 14, 14 ′, 14 ″ that are parallel to each other. Each groove 14, 14 ', 14' 'has a continuous closed-loop profile in which inclined zones 19, 19', 19 '' are marked (Fig. 4), guiding the movable blades in the direction of the opposite supporting surfaces to effect the closing of forceps for pulling out. The inclined zones 19, 19 ′, 19 ″ are made on one part, forming a movable cam 35a, which is mounted on the central shaft 12a with the possibility of axial sliding towards the return spring 36. This design is better described in document FR 2858528. The return spring 36 thus allows smooth the working clearance and wear of the cam grooves to continuously ensure the constant force of the movable blades on the opposing bearing surfaces and in this context, effectively pulling the hairs that they grab.

According to the invention, the supporting surfaces interacting with the capturing edges of the movable blades 5 are made in one piece together with a peripheral partition 17a that covers the side 20 of the row of 2 tweezers. The partition 17a is better seen in FIG. 4 and contains a rectangular base 38, the dimensions of which are almost equal to the dimensions of the side 20 of the frame 10a. The holes 18 made in the base 38 allow the capturing edges of the movable blades 5 to appear, the number of holes corresponding to the number of movable blades 5. Each hole 18 is bounded by walls extending radially outward of the rotating drum, and one of the radial walls 7 forms a supporting surface for the movable blade 5 in the time it axially reciprocates. The radial wall 7 is made as a single part together with the partition 17a using injection molding technology of a plastic material, for example ABS plastic. The radial wall 7 has a thickness that is designed so as to withstand without deformation contact with a nearby movable blade 5. The thickness of the radial wall 5 is at least 1 mm, which ensures good strength and the ability to withstand a force of about 3 N against it attached by a movable blade 5. The hole 18 contains, in addition, a tide 40 located opposite the radial wall 7, which makes it possible to better guide the hairs to the hole 18. A ball joint is fixedly mounted on the partition 17a different contact pins 41, and their height slightly exceeds the diameter of the epilation drum at the level of the movable blades to stimulate the skin and reduce pain experienced during tearing. The downward extension of the base 38 of the partition 17a is two inwardly curved lower edges 42, which are provided for fastening on the ribs 22 of the side 20 of the frame 10a.

The assembly of the rotary drum 1a is carried out by installing the central shaft 12a inside the frame 10a. The central shaft 12a is an assembly unit that was previously made by installing a movable cam 35a and a return spring 36, abutting one of its ends against the base wall of the cylindrical seat inside the movable cam 35a, with its opposite end abutting against the side wall of the shaft 12a (FIG. 2). Then the monolithic part 29 is placed at the landing site 23 of the side 20 of the carcass 10a, with little pressure applied to allow it to pass under the ribs 22. The protrusion 16 of the movable cam extends through a cutout 24 for installation in the groove 14 of the cam 15a. This operation is subsequently repeated to ensure the installation of the second monolithic part 29 at the landing site of the adjacent side of the frame 10a, and its protrusion passes through the cutout 24 'in order to be inserted into the adjacent groove 14'. As shown in FIG. 4, cutouts 24, 24 ′ and their extensions (not shown) have an axial displacement around the circumference of the chassis 10a to provide quick orientation for installing movable blades 5 that are axially offset around the circumference of the rotating drum 1a. After all movable blades are installed on six sides of the carcass 10a, partitions 17a are inserted along the perimeter of the carcass, with the lower edges 42 of the septum 17a being attached to the ribs 22 of the side 20 of the carcass 10a. The assembly of the rotary drum 1a is completed by installing the gear 33 at the end of the pins 31 of the frame 10a.

In operation, the gear 30 and the gear 33 receive a rotational movement from the electric motor located in the housing and cause the frame 10a to rotate about the longitudinal axis X-X of the fixed central shaft 12a. The frame 10a drives the movable blades 5, which extend along the grooves of the cam 15a and move in a reciprocating motion, their gripping edges inclined in the direction of the radial walls 7, abut against them according to a linear contact. Tweezers for pulling formed by one movable blade 5 and located opposite one radial wall 7, thus close, capturing the hairs, which are then pulled out as a result of rotation of the drum.

Figures 5-7 show an epilator head according to a second embodiment of the invention. The epilator head includes a drum 1b mounted rotatably about its longitudinal axis, which is the central shaft 12b, fixedly mounted in two side flanges 47 and 48. The drum 1b and the flanges 47, 48 are removable in the upper part of the motor housing (not shown). The drum 1b is made in the same way as the drum 1a according to the previous embodiment. In particular, it has the same diameter as the drum 1a, but it is approximately two times longer and therefore contains twice as many tweezers than the first: it thus contains four tweezers for pulling in each row 2.

Drum 1b comprises a central shaft 12b comprising two equally spaced cams 15a, 15b, mirror-oriented with respect to a vertical plane passing through its center. The cam 15a comprises grooves identical to the grooves 14, 14 ′, 14 ″ shown in FIG. 4, made in the fixed part of the central shaft 12b, the continuation of which are inclined zones identical to the zones 19, 19 ′, 19 ″ shown in FIG. .4, which, in turn, are made in the part forming the movable cam 35a and which are inclined in the direction of a vertical plane passing through the center of the shaft. The cam 15b contains grooves made in a similar manner to the grooves of the cam 15a, in particular in the fixed part of the shaft 12b, the continuation of which are inclined zones made on the movable cam 35b, but in which these latter are practically implemented in the clamping area of the tweezers held on the movable cam 35b in such a way that they come close to the tweezers of the cam 15a in the clamping area of the tweezers held by the cam 35a. The grooves of the cam 15b are located at the same distance as the grooves of the cam 15a relative to a vertical plane passing through the center of the shaft 12b. Each cam 15a, 15b comprises a movable cam 35a, 35b mounted by means of a spring 36 inside the central shaft 12b (FIG. 6).

The frame 10b has the same shape and radial dimensions as the frame 10a, however, it is two times longer than the first frame and contains two cutouts 24 on each side 20, each cut provided for receiving the protrusion 16 of the monolithic part 29 connecting together two movable blades 5.

Partitions 17b cover the sides of the chassis 10b. The baffle 17b is identical to the baffle 17a, however, it is twice as long as the baffle 17a according to the previous embodiment and contains four openings 18 through which the gripping edges of the movable blades 5 appear. The gripping edge of the movable blade 5 interact with the radial wall 7, made in the form of a single part with the partition 17b.

The assembly of the drum 1b is carried out in the same way as the assembly of the drum 1a, except that two monolithic parts 29 are mounted one after the other on each side of the frame 10b and then covered with a partition 17b.

During operation, the gear 30 and the gear 33 receive rotational motion from an electric motor located in the housing, and cause the frame 10b to rotate about the longitudinal axis X-X of the fixed central shaft 12b. The frame 10b drives the movable blades 5, which extend along the grooves of the cams 15a, 15b and move in a reciprocating motion parallel to the x-axis. After closing the tweezers, the movable blades are displaced in groups of two to the center of the rotating drum 1b. The gripping edges inclined in the direction of the radial walls 7 abut against them according to a linear contact. Tweezers for pulling formed by one movable blade 5 and located opposite one radial wall 7, thus close, capturing the hairs, which are then pulled out as a result of rotation of the drum.

The invention is not limited to the described and illustrated embodiment, which is given as an example. It is possible to make changes, in particular, in terms of creating various structural elements or replacing them with equivalent technical means, without going beyond the scope of the invention.

Claims (13)

1. An epilator head for an epilator with tweezers for pulling, driven by an electric motor, containing a drum (1a, 1b) configured to rotate around its longitudinal axis, the drum containing at least one row (2) of peripheral tweezers for pulling, each of which is formed by at least one movable blade (5), alternately interacting with the opposite supporting surface for gripping the hairs and then releasing them; a hollow frame (10a, 10b) on which tweezers for pulling are mounted, located coaxially with the central shaft (12a, 12b), containing at least one groove (14) of the cam (15a, 15b) forming a guide channel for the movable blade (5) during the rotational movement of the frame (10a, 10b) relative to the central shaft (12a, 12b), and a longitudinal peripheral baffle (17a, 17b) mounted on top of the row (2) of tweezers for pulling and containing an opening (18) through which passes the movable blade (5), characterized in that the hole (18) is limited to one side of the radial wall (7), forming a supporting surface for the movable blade (5) during its reciprocating motion. 2. The epilator head according to claim 1, characterized in that two movable blades (5) of the same row are connected together at their base, which contains a common protrusion (16) passing through the groove (14) of the cam (15a, 15b) . 3. An epilator head according to any one of claims 1 or 2, characterized in that the movable blade (5) is inclined relative to the radial wall (7). 4. The epilator head according to claim 1, characterized in that the cam (15a, 15b) contains a part forming a movable cam (35a, 35b), which is installed by means of a compensating spring (36) inside the central shaft (12a, 12b). 5. The epilator head according to claim 1, characterized in that it contains many peripheral rows (2) of blades, and the blades of each row are offset in the direction of the circumference of the drum (1a, 1b). 6. The epilator head according to claim 1, characterized in that it contains two cams (15a, 15b) mounted one after the other on the central shaft (12b), each cam provided with at least one groove along which the protrusion passes movable blades. 7. The epilator head according to claim 6, characterized in that the grooves of one cam (15a) approach the grooves of the other cam (15b) in the tweezers closure control zone. 8. The epilator head according to claim 1, characterized in that the septum (17a, 17b) is made of plastic material. 9. The epilator head according to claim 8, characterized in that the plastic material is ABS plastic. 10. The epilator head according to claim 8, characterized in that the thickness of the radial wall (7) is at least 1 mm. 11. The epilator head according to claim 9, characterized in that the thickness of the radial wall (7) is at least 1 mm. 12. The epilator head according to claim 1, characterized in that the drum (1a, 1b) is held by means of a support containing two side flanges (47, 48) and is removable relative to the engine housing. 13. The epilator, characterized in that it contains a housing made with the possibility of holding it by hand and closing the electric drive motor, characterized in that it contains an epilator head according to any one of the preceding claims 1-12.

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