ELECTRIC DEVICE FOR BODY CARE

Description

[0001] The invention relates to an attachment for tooth cleaning which can be applied to a handle, wherein the attachment has a base region and a head region which are connected by a neck region, wherein the attachment comprises a socket-like coupling structure which has at least two steps with different circumferential geometries and which forms the attachment-side part for an interface with a substantially opposite, plug-like coupling structure of the handle, wherein the attachment has a stop surface which runs obliquely to a straight insertion direction.

[0002] US Pat. No. 5,365,627 discloses an oral hygiene device with a handle and an automatic shaft insertion system. The oral hygiene device has a pair of key-like projections on the drive motor shaft. A bore in the shaft receives the shaft, and slots in the shaft accommodate the key-like projections. A pair of collars on the shaft each have a ramp-like structure to receive and engage the key-like projections. When the shaft is coupled to the handle, the key-like projections are inserted into the slots by means of a sliding movement of the key-like projections on the ramps. A21426WOEP / 4

[0003] At the base of the shaft is a radially outwardly extending flange, which is received by a pair of flexible arms that project from the base of the shaft and each have a recess. When the shaft is coupled to the handle, the flange engages the flexible arms and bends them apart. Further movement of the shaft toward the handle causes the flange to snap into the recesses in the arms. When the flange is withdrawn from the handle, the flange causes the flexible arms to bend apart again to release the flange from their recesses.

[0004] Further coupling structures for a handle and corresponding brush heads of an electric toothbrush are known from US patent 3,088,148, WO 2011 / 073848 A1 and US patent 3,369,265.

[0005] Electric toothbrushes in which the vibration drive in the handle is arranged in different positions with respect to the coupling or interface between the handle and the brush head are known from WO 2008 / 130246 A1, DE 1 632 389 and US patent 3,685,080.

[0006] EP 1 790 312 discloses an electrically powered toothbrush with a fluid dispensing function. The toothbrush has channels leading from a pressure cartridge into the attachment, allowing the targeted dispensing of a fluid during brushing. The pressure cartridge is housed in a recess in the handle.

[0007] The publication WO 2013 / 132363 A1 describes a A21426WOEP / 4

[0008] Facial brush. The brush has a stop surface that runs diagonally to the longitudinal axis of the facial brush handle and perpendicular to the direction of insertion of the brush.

[0009] US Pat. No. 6,546,585 teaches securing the attachment to the handle by having a horizontal projection of a coupling structure on the handle engage a recess in the attachment. This requires a precise, vertical fit of the attachment on the handle. Furthermore, fluids and dirt can penetrate the interior of the attachment through the recess.

[0010] It is the object of the present invention to provide an attachment of the type mentioned at the outset which efficiently ensures simple and secure assembly and a firm hold on the handle and also ensures effective transmission of vibration from the handle to the attachment.

[0011] This object is achieved according to the invention in that the plug-on part comprises a socket-like coupling structure having at least two steps with different circumferential geometries and forming the plug-on-side part for an interface with a substantially opposite, plug-like coupling structure of a handle. The plug-on part has a stop surface that runs obliquely to a straight insertion direction.

[0012] The attachment part can be applied to a handle of an electrical device for cleaning teeth. The handle has a longitudinal axis AG, wherein a vibration unit comprising an electric motor and an eccentric is arranged in the handle, wherein a plug-like coupling structure protrudes from the handle and forms an interface with a substantially identical socket-like coupling structure of the attachment part, wherein the interface has at least two steps with different circumferential geometries, wherein at least one of the steps comprises an anti-twist device or means for anti-twist between the handle and the attachment part, and wherein a stop surface of the handle for the attachment part runs obliquely to the longitudinal axis AG of the handle;and in a first alternative solution by an electric device for cleaning teeth with a handle with a longitudinal axis AG and an attachment part that can be attached to the handle, wherein a vibration unit having an electric motor and an eccentric is arranged in the handle, wherein a plug-like coupling structure protrudes from the handle and forms an interface with a substantially identical socket-like coupling structure of the attachment part, wherein the interface has at least two steps with different circumferential geometries, wherein a stop surface between the handle and the attachment part runs obliquely to the longitudinal axis AG of the handle and wherein the handle has a cam which interacts with an identical recess in the attachment part in the manner of a snap connection;and in a second alternative solution by an electric device for cleaning teeth with a handle with a longitudinal axis AG and an attachment part that can be attached to the handle, wherein a vibration unit having an electric motor and an eccentric is arranged in the handle, wherein a plug-in type coupling structure protrudes from the handle and forms an interface with a substantially identical socket-type coupling structure of the attachment part, wherein the interface has at least two steps with different circumferential geometries, wherein at least one of the steps comprises an anti-twist device between the handle and the attachment part, wherein the electric motor is arranged in the region of the interface and wherein the rotation axis AM of the electric motor and the longitudinal axis AG of the handle enclose an angle β between 3° and 20°, particularly preferably between 7° and 13°.;

[0013] In a preferred embodiment of the present invention, the stop surface and the longitudinal axis of the handle AG form an angle α of between 30° and 70°, preferably between 45° and 55°. By means of the stop surface beveled in this way, the contact surface available for the coupling between the plug-type coupling structure and the opposing socket-type coupling structure can be increased (in other words, the contact surface of the interface as such is larger than, for example, in a conventional vertical design). This is desirable with regard to secure guidance of the plug-on part and an improved, i.e., higher, trigger pull weight.

[0014] In a further preferred embodiment of the present invention, the dimension from the stop surface to the rear end of the handle is larger on the front than on the rear, so that the stop surface runs from front to back. This type of design has proven advantageous in handling.

[0015] The front side is generally the side of the handle or electrical device on which the thumb rests during operation (e.g., when turning the device on and off). The front side is also generally the side toward which the bristle area of ​​a brush head is directed. The back side is the opposite side, 180° away.

[0016] In a further preferred embodiment of the present invention, the stop surface of the handle and the rotational axis of the electric motor AM, which is preferably inclined relative to the longitudinal axis of the handle AG, form an angle φ between 35° and 90°, preferably between 50° and 70°. In this way, the vibration unit, which according to the invention comprises an electric motor with an eccentric, can be brought particularly effectively into the area of ​​the interface, preferably near the base area of ​​the plug-type coupling structure.

[0017] In a further preferred embodiment of the present invention, the plug-like coupling structure of the handle and the oppositely identical socket-like coupling structure of the plug-on part enable straight insertion, wherein the longitudinal axis of the plug-like coupling structure AK is preferably offset parallel to the longitudinal axis of the handle AG. This configuration has proven particularly advantageous for handling.

[0018] Preferably, the handle has a cam in the region of the plug-like coupling structure, which interacts with an opposite recess of the plug-on part in the manner of a snap connection.

[0019] Definition of the term: Handle - is defined as a ready-to-use part consisting of a handle and closure lid as well as the inner workings; handle - is defined as the hand body with inner workings; hand body - is defined as an injection-molded part consisting of the base body(s) and overmolded body(s).

[0020] In a further preferred embodiment of the present invention, the material from which the hand body or the base body of the hand body (and in particular also the cam) is formed is harder than the material from which the plug-on part or the base body of the plug-on part (and in particular also the recess) is formed. In general, polypropylene materials with different moduli of elasticity are preferably used (a lower modulus of elasticity indicates a softer material). The reason why the material of the plug-on part or the base body of the plug-on part is chosen to be softer than that of the hand body or the base body of the hand body lies in the desired longevity of the snap connection, because due to the softer material, the plug-on part or the base body of the plug-on part generates less abrasion on the cam and generally on the entire plug-like coupling structure.

[0021] In general, the frictional forces between the plug-on part wall and the interface surface or the plug-like coupling structure can be kept to a minimum and the wear caused by the change occurs preferentially on the base body of the plug-on part.

[0022] Preferably, the plug-like coupling structure of the handle can have a slight distortion so that the trigger weight of the snap connection can be increased.

[0023] Preferably, the base body of the hand body is made of a hard component, namely Total PPH 5042 from Total SA (Total is a trademark of Total SA) or Moplen HP548L from LyondellBasell Industries Holdings BV (Moplen is a trademark of LyondellBasell Industries Holdings BV), and the hard component of the base body of the attachment part is preferably made of PP Tipplen R359 from TVK Plc. (Tippeln is a trademark of TVK Plc.).

[0024] The elastic modulus of the hard component of the base body of the handpiece is between 1300 MPa and 2500 MPa, preferably between 1300 MPa and 1800 MPa. The elastic modulus of the hard component of the base body of the attachment part is between 700 MPa and 1500 MPa, preferably between 900 MPa and 1250 MPa.

[0025] In a further preferred embodiment of the present invention, the cam in the plug-like coupling structure is tree-shaped, preferably with a straight trunk and a circular crown. This allows for a particularly effective snap connection with the opposing recess.

[0026] The straight stem preferably has a width of 2 mm to 4 mm, preferably 2.5 mm to 3.5 mm. The circular crown preferably has a diameter of 2 mm to 5 mm, preferably 3 mm to 4.5 mm.

[0027] The total length of the cam from its attachment point is preferably 4 mm to 7 mm, particularly preferably 5 mm to 6 mm. The distance of the circle center (crown) from the attachment point of the cam is preferably 2 mm to 6 mm, preferably 3 mm to 4 mm. The height of the cam (or the offset of the cam from the remaining surface of the third step) is preferably 1 mm to 3 mm, particularly preferably 1.5 mm to 2.5 mm.

[0028] The recess on the attachment part is opposite to the cam and preferably has a tolerance of 0 mm to 0.4 mm, preferably 0.15 mm to 0.25 mm, relative to the cam. This is advantageous with regard to the desired longevity of the snap connection. Further preferably, the recess opposite to the cam on the attachment part has a slot in its extension (i.e., viewed in the longitudinal direction of the recess opposite to the cam towards the free end of the attachment part), which slot also serves to adjust the desired holding strength or trigger weight. The length of the slot (i.e., without the recess opposite to the cam) is 1 mm to 8 mm, preferably 1 mm to 5 mm.

[0029] By means of the geometric design of the cam and the recess as well as the appropriate choice of material, a trigger weight in the order of 2 kg to 6 kg, preferably 2 kg to 4 kg, can be achieved.

[0030] Preferably, the vibration unit with the electric motor and the eccentric is arranged in the area of ​​the interface, with the rotational axis of the electric motor AM and the longitudinal axis of the handle AG forming an angle β between 3° and 20°. In particular, the eccentric protrudes, viewed in cross-section, into a front area of ​​the handle, which is at least partially surrounded by the opening of the attachment part. Together with the angle β, this allows for particularly efficient vibration transmission.

[0031] In a further preferred embodiment of the present invention, the rotational axis of the electric motor AM and the longitudinal axis of the handle AG form an angle β of between 7° and 13°. This further increases the efficiency of vibration transmission.

[0032] In a further preferred embodiment of the present invention, the electric motor is arranged on a support element, which is preferably made of a plastic material. The eccentric preferably extends beyond the front edge of the support element to enable uninterrupted vibration transmission.

[0033] In a further preferred embodiment of the present invention, the electric motor is held in the support element by clamping, preferably by lateral clamping on both sides above its rotational axis AM. The electric motor does not need to be clamped over its entire length; preferably, the clamping occurs in the rear area of ​​the electric motor at the cable connection. In this way, the electric motor can be particularly well snapped into the support element or fixed in the support element.

[0034] In a further preferred embodiment of the present invention, the support element has a stop for the front end (called the front motor stop) and optionally also for the rear end (called the rear motor stop) of the electric motor, with both stops preferably ending vertically below the rotation axis AM of the electric motor. This ensures a secure hold for the electric motor and prevents interference with the cable connection and the rotation axis AM with the eccentric. The eccentric preferably protrudes beyond the front motor stop of the support element to ensure trouble-free operation.

[0035] As an alternative to the electric motor with an eccentric mounted directly on the electric motor (as described above), it is also possible to design the electric motor with an extended, possibly flexible, shaft and mount the eccentric away from the electric motor. This allows the eccentric to be installed further forward in the coupling structure, as the motor volume does not have to be housed directly adjacent to it.

[0036] A flexible axis is one that extends from the motor to the eccentric in a curved manner, meaning the eccentric is not in a straight line with the motor axis. The flexibility of the axis still allows for rotational movement.

[0037] The extended shaft can be constructed in one or more parts. It can either continue in one piece from the motor's rotational axis AM or be attached to the motor's rotational axis AM.

[0038] The extended axle may be inherently unstable and unable to hold the eccentric in a stable position while moving. It may therefore be necessary to support the axle. For example, this support can be provided after the eccentric (as seen from the motor), by having the axle extend beyond the eccentric, and by inserting the axle into a bushing to hold it in position, or by guiding / supporting it. It is also possible to guide the axle between the motor and the eccentric. The guide can be designed so that the axle is retracted, or it can be designed so that the axle rests against the bushing.

[0039] The bushing is preferably molded into the base body of the handle and is made of the same material as the base body. However, the bushing can also be equipped with support / bearing elements, such as metal bushings or ball bearings. These elements can be mounted after injection molding or inserted directly into the injection mold and overmolded.

[0040] The present invention is preferably used in products for tooth cleaning, such as oral hygiene.

[0041] For oral hygiene, the device is preferably designed for use as a manual toothbrush (especially in the form of a non-motorized reusable toothbrush, as the coupling structure and interface can also be used for manual, non-motorized applications). The handle can be used for an extended period of time, and only the brush head needs to be replaced.

[0042] However, the present invention will particularly preferably be used for electric toothbrushes, in particular for vibrating / sonic toothbrushes.

[0043] Other preferred applications in oral hygiene are interdental brushes, interdental cleaning products or tongue cleaners.

[0044] In cosmetics, applications for the application of cosmetic media in liquid or solid state are preferred z.B. intended as a mascara brush, nail polish brush, for make-up application or removal, etc.

[0045] Another application is hair removal using a wet razor or other suitable means.

[0046] Other preferred applications are facial cleansing and care, foot care (pedicure) and hand care (manicure), especially nail cleaning and care as well as callus removal. Preferred production

[0047] The manufacture of the hand body according to the invention and the plug-on part according to the invention or the base body and overmolded body of the plug-on part is preferably carried out by injection molding in an injection molding tool.

[0048] The hand body is preferably manufactured in a two-, three-, or multi-station mold (e.g., a helicopter mold). First, the hard component is injection-molded to create the base body. Subsequently, one or two soft components, each called an overmolded body, are molded onto the base body (during the same injection process). Finally, the finished hand body is removed from the injection mold in the closed state. Certain components in the base body or the overmolded bodies can be designed with side shifters (openings, recesses, etc.). Injection molding multiple soft components in the same step requires a special geometry for the corresponding part. The requirement is that the soft components explicitly form separate volumes or zones and do not directly adjoin one another.

[0049] The attachments or brush heads are preferably manufactured using single-component injection molding (preferably from a hard component). However, it is also possible to produce the attachments using multi-component injection molding, thus incorporating one or more hard and / or soft components to create the base body and several overmolded bodies.

[0050] The bristles of the brush heads are preferably produced using the AFT process (Anchor Free Tufting), by conventional anchor punching, by IMT (In Mould Tufting), by IAP (Integrated Anchorless Production) or by spraying bristles or cleaning elements.

[0051] Overall, a small, lightweight, and handy, pen-shaped device for tooth cleaning applications is created. This allows for easy transport (for example, in a beauty case) and precise application.

[0052] The volume of the handle (including the cap) is between 75 cm 3< and 150 cm 3< .

[0053] The weight of the handle is approximately 35 g to 50 g, preferably 40 g to 47 g.

[0054] The weight of the attachments is approximately 5 g to 25 g, preferably 7 g to 15 g.

[0055] In a further embodiment of the invention, the following is included: handle for an electrical device for cleaning teeth, to which a plug-in part can be applied and which has a longitudinal axis AG, wherein a vibration unit having an electric motor and an eccentric is arranged in the handle, wherein a plug-like coupling structure protrudes from the handle, which has at least two steps with different circumferential geometries and which forms the handle-side part for an interface with an opposite, socket-like coupling structure of a plug-in part.

[0056] The hand body for the handle according to the invention is preferably formed by injection molding from three material components, namely preferably one hard component and two soft components.

[0057] The first component is preferably the hard component. The hard component forms the base body of the handpiece, which includes the handle-side, plug-like coupling structure for the interface with the brush head, as well as a corresponding closure structure for the closure lid, which regularly closes the handle. The soft components are then applied to the base body as overmolded bodies. Furthermore, the base body preferably encloses the interior of the handpiece.

[0058] The base body preferably further comprises one or more flat areas so that the handle can lie stably in one position, and moreover preferably has a preferably free-standing position for a vent hole (ie the vent hole is not covered in the rest position when the base body rests on the flat areas on a flat surface).

[0059] The vent hole defines a passage through existing hard and / or soft components from the environment (the exterior) into the interior of the handle or handle / hand body. It is preferably sealed by a vent membrane, with the vent membrane being mounted on the inside, i.e., inside the hand body. This tightly seals the housing, preventing water and dust from penetrating, and only allowing gas exchange with the interior. The vent membrane is bonded to the cylindrical inner surface of the cavity using an application mandrel.

[0060] The purpose of the vent hole is to provide a pressure relief valve and to allow gas from a battery to be vented from the interior.

[0061] The injection point for the hard component of the hand body is located at the front, viewed from the thumb grip towards the attachment part.

[0062] A soft component of the hand body, which is molded into an injection-molded mold, preferably forms the switch section, which represents the functional transition from the inside to the outside. The switch itself is mounted directly beneath the switch section, preferably on a printed circuit board. For this reason, the soft component can be provided with an on / off switch symbol.

[0063] The injection point for the first soft component of the hand body is preferably on the front of the hand body or base body, in the area of ​​the switch section. The first soft component preferably covers the injection point of the hard component or is located above it.

[0064] The second soft component of the hand body is preferably used for the color design of the front section, the branding (print), and also the grip of the handle. It can add another color to the body in addition to the base body made of hard components and the first soft component. The injection point is preferably located on the front of the hand body or base body, below the switch section. The first soft component forms an island with a zone within the second soft component.

[0065] The soft components are generally intended to provide good grip and a non-slip surface. They also dampen vibrations.

[0066] In the front part of the handle, two soft material zones are attached to the front and back of the device, allowing the user to hold the device like a pen-shaped writing instrument. At least one of the zones is preferably slightly concave. Both zones are preferably manufactured from the same soft material in a single step.

[0067] The eccentric which generates the vibrations is preferably not located between the discussed zones of soft material.

[0068] The length of the handle, with the closure cover mounted to the end of the interface or the plug-type coupling structure, is preferably 130 mm to 190 mm, particularly preferably 160 mm to 175 mm; without the closure cover mounted, i.e. in the form of the handle, to the end of the interface or the plug-type coupling structure, is 120 mm to 170 mm, preferably 145 mm to 151 mm.

[0069] The handle preferably has an approximately rounded cross-section, being taller than it is wide, meaning it typically has a greater vertical extension. Furthermore, the handle is preferably tapered lengthwise. The free end (opposite the coupling structure for the plug-on part) is usually the widest. The tapered end is preferably located between the free end and the thumb grip or switch section. The switch section, or the transition to the neck, is preferably the second widest point. This tapered end also allows the user to hold the device like a pen-like writing instrument and to guide it with corresponding precision.

[0070] The width of the handle is 12 mm to 25 mm, preferably 19 to 23 mm at the widest point and preferably 12 to 15 mm at the narrowest point.

[0071] The height of the handle is 14 mm to 30 mm, preferably 20 mm to 25 mm at the highest point and preferably 15 mm to 20 mm at the lowest point.

[0072] A support element is preferably arranged within the handle or the handle part, which serves as a framework for the interior of the handle or the handle part.

[0073] When designing the carrier element, a basic distinction is made between a rechargeable battery version and a disposable battery version, which partly differ in terms of their components, their arrangement and properties.

[0074] In the battery version as well as in the battery version, however, an electric motor with an eccentric is initially provided as a vibration unit, whereby the electric motor drives the eccentric or the eccentric is mounted on the rotation axis AM (or its extension) of the electric motor, so that a vibration is generated (other vibration generators are conceivable).

[0075] The electric motor in the battery version preferably has a voltage (when charged) of approximately 1.2-1.3 V, a current consumption with eccentric of 50 mA - 600 mA, preferably 200-500 mA, and a speed of 3000 rpm to 16000 rpm, particularly preferably 13500 rpm.

[0076] In the battery version, the electric motor preferably has a voltage of 1.5 V, a current of 50 mA - 600 mA, preferably 200-500 mA, and preferably a speed of 5000 rpm to 16000 rpm, particularly preferably 13000 rpm.

[0077] If the handle is designed for a facial brush, the device is preferably designed as a cordless version; a battery-operated version is not excluded. The speed ranges from 5,000 rpm to 16,000 rpm, particularly preferably from 9,000 rpm to 11,000 rpm.

[0078] If the handpiece is designed for use as a nail tool, the device is preferably designed as a battery-operated version; a rechargeable version is not excluded. The speed ranges from 5000 rpm to 12000 rpm, particularly preferably from 7500 rpm to 9000 rpm.

[0079] Both electric motor versions preferably have a cylindrical shape and a length of 13 mm to 20 mm, preferably 15 mm to 17 mm and preferably a diameter of 5 mm to 10 mm, preferably 6 mm to 7 mm.

[0080] The eccentric is preferably semi-cylindrical or mushroom-shaped and is mounted on the electric motor shaft. It has a length of 2 mm to 6 mm, preferably 3 mm to 5 mm. Its diameter is 4 mm to 8 mm, preferably 5 mm to 7 mm. The weight of the eccentric is between 0.5 g and 5 g, preferably between 0.8 g and 1.5 g. The electric motor shaft can be extended in one or more parts so that the eccentric protrudes further into the coupling structure. The eccentric can thus be spaced 2 mm to 30 mm from the electric motor. The axle can be mounted at the free end within the coupling structure.

[0081] When assembled, the electric motor and the eccentric are arranged in the area of ​​the plug-shaped coupling structure and thus represent the foremost functional element both inside the handle / handpiece and on the support element.

[0082] During use, the electric motor, or at least the eccentric, is preferably positioned in front of the grip's holding position, which is defined by the thumb and index finger. The thumb rests in the area of ​​the on / off switch symbol, and the index finger rests on a soft-component surface on the back. Depending on the application, the thumb and index finger can also be swapped. Both positions allow the device to be held like a pen-like writing instrument.

[0083] Preferably, the rotation axis AM of the electric motor or the eccentric axis is arranged at an angle to the longitudinal axis of the handle AG and preferably also at an angle to the support element. This means that the insertion direction R of the support element does not correspond to the direction of the rotation axis of the electric motor AM.

[0084] The electric motor is preferably held on both sides of the support element by means of clamping elements. The clamping elements are preferably inwardly directed webs on the side walls of the guide, which clamp the electric motor above the rotational axis AM or into which the electric motor is snapped. The front part of the support element as well as the lateral clamping elements or webs preferably have the same bevel relative to the longitudinal axis of the handle AG as the rotational axis AM of the electric motor.

[0085] The clamping does not have to be carried out over the entire length of the electric motor; it is preferably carried out only in the rear part of the electric motor, for example in the area of ​​the cable connection.

[0086] In the longitudinal direction of the support element, a front and, if necessary, a rear motor stop are provided for the electric motor, which preferably each end below the rotation axis AM of the electric motor.

[0087] The eccentric preferably protrudes beyond the support element or the front motor stop to ensure uninterrupted operation.

[0088] For the electric motor, without the attached part installed, the following preferred length and distance ratios compared to the handle (i.e. with the cover attached) result.

[0089] The electric motor (reference point is the center of the electric motor / eccentric unit) is located, measured from the rear end of the handle, preferably at about 75% to 90% of the total length, more preferably at about 81% of the total length (the total length is measured from the free end of the plug-like coupling structure to the rear end of the closure cover).

[0090] Accordingly, the electric motor, measured from the free end of the plug-type coupling structure, is preferably located at about 10% to 25% of the total length, more preferably at about 19% of the total length.

[0091] The eccentric itself (reference point is the center point of the eccentric) is located, measured from the rear end of the handle, preferably at about 80% to 95% of the total length, more preferably at about 86% of the total length of the handle (the total length is measured from the free end of the plug-like coupling structure to the rear end of the closure cover).

[0092] Accordingly, the eccentric, measured from the free end of the plug-like coupling structure, is preferably about 5% to 20% of the total length of the handle, more preferably about 14% of the total length of the handle.

[0093] For the electric motor, with the attachment mounted, the following preferred length and distance ratios result compared to the handle with cover and attached attachment (e.g. a brush attachment).

[0094] The electric motor (reference point is the center of the electric motor / eccentric unit) is located, measured from the rear end of the handle, preferably at about 55% to 70% of the total length, more preferably at about 62% of the total length (the total length is measured from the center of the working tip of the attachment part to the rear end of the handle).

[0095] Accordingly, the electric motor, measured from the center of the working tip of the attachment, is preferably located at about 30% to 45% of the total length, more preferably at about 38% of the total length.

[0096] The eccentric itself (reference point is the center of the eccentric) is located, measured from the rear end of the handle, preferably at about 60% to 75% of the total length, more preferably at about 66% of the total length (the total length is measured from the center of the working tip of the attachment to the rear end of the handle).

[0097] Accordingly, the eccentric, measured from the center of the working tip of the attachment, is preferably located at about 25% to 40% of the total length of the handle, more preferably at about 34% of the total length of the handle.

[0098] The design and arrangement of the switch is preferably the same for the rechargeable battery and the battery version of the carrier element.

[0099] The switch is preferably used to turn the respective electrical device on and off and, if necessary, to select a specific program or operating mode for the respective electrical device. It is preferably located in a separate compartment (switch compartment) behind the electric motor on the support element.

[0100] The switch is preferably a mechanical on / off switch that operates by contact interruption; however, an electrical selector switch can also be used (e.g., with the modes: On - Mode 1 - Mode 2 - Mode X - Off). This is preferably implemented with a pulse switch and a microprocessor. The microprocessor then also defines the predefined program / mode selection. Options for different modes include, for example, reduced speeds (sensitive), massage (changing speed), pulsation (switching the motor on / off with interruptions), or combinations of these options.

[0101] The remaining components are designed to operate with both switch variants.

[0102] The switch preferably has a base area of ​​approximately 6 mm x 6 mm. Furthermore, its height is approximately 10 mm in the off state and approximately 9 mm in the on state. This means that the switch must be moved approximately 1 mm to actuate it.

[0103] When assembled, the switch is located in the switch compartment of the support element, where it is permanently mounted on a printed circuit board that is arranged or latched on the underside of the support element. The switch is secured by the printed circuit board holder. The printed circuit board preferably has five outputs for the switch (double switch).

[0104] In the battery version, the battery stores the energy required to operate the respective electrical device.

[0105] The battery is preferably cylindrical in shape. It is 35 mm to 50 mm long, preferably 40 mm to 45 mm. Its diameter is 8 mm to 12 mm, preferably 10 mm to 11 mm. It has a capacity of 400 mAh to 1000 mAh, preferably 700 mAh to 900 mAh, and a voltage of 0.6 to 1.4 V, preferably 1.2 V. The battery size is preferably AAA. The battery is preferably a NiMH (nickel-metal hydride battery).

[0106] When installed, the battery is preferably firmly connected to the printed circuit board. The printed circuit board is preferably mounted or latched to the underside of the support element. The battery is preferably mounted to the top of the support element. The battery's contact plates or solder tabs are passed through the printed circuit board and then soldered accordingly.

[0107] To establish a connection to a power supply and to charge the battery, a socket is preferably provided at the rear end of the carrier element, which is exposed by removing the cover.

[0108] The bushing is preferably a round bushing with a basic cylindrical shape. The outer shape of the cylinder is rotationally symmetrical and has a circumferential projection at the bushing end. The bushing is preferably watertight and corrosion-resistant, which is achieved by a suitable coating.

[0109] For assembly, the socket is preferably pressed from the rear, with the rear side first, into a hollow cylindrical socket compartment of the carrier element until the socket at the front end of the socket compartment (seen in the insertion direction R) abuts against a corresponding circumferential stop of the socket compartment; the rear side of the socket preferably abuts against this front stop, which preferably ends below the central longitudinal axis of the socket. Connections are preferably provided on the rear of the socket, via which connections the socket is connected to the printed circuit board by means of electrical connecting lines. Rotation of the socket in the hollow cylindrical socket compartment is prevented by pressure / friction (i.e. by a press fit and a frictional connection).

[0110] The bushing has a diameter of 5 mm to 11 mm, preferably 7 mm to 9 mm, with elevations / protrusions extending from this. The projections serve to improve anchoring in the support element and to prevent the bushing from slipping out of the bushing compartment. One projection is designed from the rear of the bushing as a ramp with a subsequent vertical surface (sloping towards the original bushing diameter), forming a barb. This projection is designed in the middle area of ​​the bushing and has a height of 0.1 mm to 0.8 mm, preferably 0.25 mm to 0.5 mm, above the bushing diameter. Furthermore, the bushing also has a similarly designed projection at its end - the bushing side. This projection is raised by 0.5 mm to 1.2 mm, preferably 0.7 mm to 0.95 mm, above the bushing diameter.

[0111] The bushing is installed in the support element or bushing compartment by pressing it into the structure. The barbs described above act to prevent the bushing from slipping out of the bushing compartment. The bushing compartment is designed slightly longer than the bushing itself, so that it is recessed by 0.2 mm to 1.5 mm, preferably 0.5 mm to 1 mm. This allows the projection or barb on the bushing-side end of the bushing to function optimally.

[0112] In the standard version, the connection to the power grid is designed so that a plug is inserted into the socket. This plug is connected via a cable to the power supply, which in turn is connected to the power grid, i.e., the socket.

[0113] In one variant, the connection to the power supply is achieved via a USB port (5 V). The connection is designed so that a plug is inserted into the socket. This plug is connected via a cable to a USB connector, which in turn is connected to a USB port. This can come from a PC, for example, or from a corresponding power supply connected to the power supply. This enables charging via PC. This variant can also be implemented using the same printed circuit board / components.

[0114] Another variant provides inductive charging. However, this one has a different design. Here, the cover is not removable by the user, and a (separate) charging station is required next to the handle. The cover of the handle has a recess for the charging station's ferrite core, and the handle is placed on the charging station or its ferrite core for charging.

[0115] The handset can house one or more LEDs. The intensity of the light emitted by the LEDs allows the light to pass through the housing without the need for special cutouts. However, it may be necessary to ensure that the housing does not exceed a certain maximum thickness in this area.

[0116] The LEDs are preferably mounted either between the battery and the front stop of the socket or in direct proximity to the switch.

[0117] LEDs can be used to visualize various events. These include on / off, color, and flashing interval. For example, timer functions, contact pressure, and battery level can be displayed.

[0118] A microprocessor with a timer function can be integrated into the electronics. For example, to indicate a change of treatment area (quadrant timer for toothbrushes, timers for different facial zones for facial brushes), to indicate the maximum brushing time, or to create an auto-off function that stops the device because a longer treatment would not be beneficial.

[0119] The timer can be indicated, for example, via the LEDs mentioned or via the motor power.

[0120] If a microprocessor is used, a pulse switch is used instead of the mechanical on / off switch, which sends an electrical pulse to the microprocessor. Preferred support element for battery version

[0121] The support element has a generally straight configuration. The electric motor compartment is preferably located at the front end, as seen in the insertion direction R. Due to its sloped design (ramp-shaped web with a straight underside for angled support of the electric motor, as well as correspondingly sloped side walls with equally sloped clamping elements (in the form of webs) for snapping the electric motor into place), this compartment ensures the above-described inclination of the electric motor relative to the longitudinal axis of the handle AG (angle β).

[0122] A cable duct is preferably located behind the electric motor compartment (this is shorter in the rechargeable version than in the battery version). The switch compartment is preferably connected to the cable duct (this is longer in the rechargeable version than in the battery version, but the switch is essentially in the same location in both cases; this means that it is in the same position relative to the handle, since it must be operated by the switch section).

[0123] This is preferably followed by the battery compartment, which in turn is connected to a cable feedthrough. This is preferably followed by the socket compartment. At the end of the support element is the socket connection compartment (also hollow-cylindrical), which, however, has a larger diameter than the socket compartment.

[0124] The printed circuit board is arranged on the underside of the carrier element and is held by a printed circuit board holder (preferably by locking lugs on the underside of the carrier element). A contact plate, the carrier element contact plate, is provided on the outside of the socket and connection compartment (in the direction of the cover). A seal (e.g., in the form of a sealing ring) is preferably provided in front of or above the contact plate (i.e., the carrier element contact plate) in the insertion direction R.

[0125] One difference compared to the battery version is that the printed circuit board in the rechargeable battery version is longer and thus forms a kind of carrier for the battery.

[0126] The printed circuit board primarily functions as a connecting element for the various electrical components (i.e., the various connecting and contact elements). It also serves as a carrier or support for a certain portion of the electrical components, particularly the mechanical switch or, alternatively, the pulse switch and microprocessor, as well as other components required for their operation.

[0127] In the battery-powered version, the printed circuit board is preferably permanently connected to the electric motor via one or more cables. The switch is preferably connected directly to the printed circuit board. The battery is preferably connected directly to the printed circuit board via solder tabs. The socket is preferably connected to the printed circuit board via one or more cables. Furthermore, the printed circuit board is permanently connected to the carrier element contact plate.

[0128] In a further preferred embodiment, the charging current limitation is realized via resistors on the printed circuit board (e.g. by means of two resistors arranged in series, wherein the total resistance is divided into two series resistors for thermal reasons). Preferred carrier element for battery version

[0129] The electric motor including the eccentric and the switch are dimensionally identical to those of the battery version.

[0130] The battery, which stores or provides the energy required for operation, is usually a replaceable AAA battery (1.5 V). The battery is preferably cylindrical in shape. The battery is preferably 42 mm to 43 mm long (without the terminal cap). The diameter is approximately 10 mm to 11 mm.

[0131] The battery is inserted from the rear into a battery compartment of the carrier element with the cover open. The cover is then attached to the handset. Turning the cover locks it into place, closing the circuit.

[0132] When installed, the battery is indirectly connected to the printed circuit board via a first (front) contact plate, the battery contact plate, at the first terminal, and via a second (rear) contact plate, the carrier element contact plate, to the cover plate. The circuit is closed via the cover plate.

[0133] The carrier element contact plate is included in both the rechargeable and battery versions. In both cases, this contact plate establishes the power connection between the printed circuit board and the cover. Due to the shorter printed circuit board in the battery version, the carrier element contact plate is correspondingly longer in the battery version to compensate for the length difference. In the rechargeable version, the carrier element contact plate is correspondingly shorter.

[0134] The support element preferably has a fundamentally straight configuration. The electric motor compartment is preferably located at the front end, as seen in the insertion direction R. Due to its sloped design (ramp-shaped web with a straight underside for angled support of the electric motor, as well as correspondingly sloped side walls with equally sloped clamping elements (in the form of webs) for snapping the electric motor into place), this preferably ensures the above-described inclination of the electric motor or the rotation axis AM of the electric motor relative to the longitudinal axis of the handle AG (angle β).

[0135] A cable duct is preferably located behind the electric motor compartment (this is preferably longer in the battery version than in the rechargeable version). The switch compartment is preferably connected to the cable duct (this is preferably shorter in the battery version than in the rechargeable version, although the switch is located essentially in the same location in both cases).

[0136] Behind the switch compartment is a contact plate compartment for the first contact plate, called the battery contact plate, which leads to a first battery terminal. The contact tongue or contact area of ​​the battery contact plate extends into the adjacent battery compartment.

[0137] In contrast to the battery version, the carrier element here is designed so that the battery is inserted from the rear and then guided laterally. The rear section of the battery compartment is preferably hollow-cylindrical. Adjacent to it is a connection compartment with a slightly larger diameter. A seal is not necessarily required on the outside of the connection compartment, as there is less risk of contact with splash water.

[0138] The printed circuit board is in turn held by a printed circuit board holder (e.g., locking lugs) on the underside of the carrier element, preferably below or at least partially below the switch and contact plate compartment. The second contact plate, the carrier element contact plate, is arranged on the outside of the connection compartment, facing the cover.

[0139] In the battery version, the printed circuit board also serves as a connecting element for the various electrical components, i.e. the various connecting and contact elements, and also as a carrier or holder for a certain part of the electrical components (but not for the battery).

[0140] In the battery version, the printed circuit board is preferably shorter. Furthermore, the printed circuit board is firmly connected to the electric motor (via appropriate connecting cables). The printed circuit board is also preferably directly connected to the switch, the battery contact plate, and the carrier element contact plate, which is ultimately connected to the cover.

[0141] In particular, a length adjustment is created on the support element so that the same cover can be used for both the rechargeable and battery versions. Accordingly, certain components on the support element must also be adapted depending on the version to support the length adjustment. Preferred closure cap

[0142] The cover is identical for both the rechargeable and battery versions. Its function is, firstly, to close the interior. This is achieved by inserting it into the rear opening of the handset and then turning it, which closes the electrical circuit through the contact plate of the cover. This creates contact with the carrier element contact plate (on the carrier element side) on the cover, as well as simultaneously with a contact point on the socket (rechargeable version) or with a contact point / battery terminal on the battery (battery version). Furthermore, turning the cover holds or fixes the cover relative to the handset.

[0143] For this purpose, a corresponding contact plate of the closure cover has two elements, namely a lateral projection for fixing relative to the handle and for closing the circuit, and a spring tongue for contacting the socket or the contact element of the socket or the battery and for closing the circuit.

[0144] This contact plate of the cover has a length of 11 mm to 15 mm, preferably 12.5 mm to 13.5 mm, with a sheet thickness of 0.2 mm to 0.5 mm, preferably 0.25 mm to 0.35 mm. The sheet width is designed so that it is not uniform across the entire contact plate, as certain parts must be wider to ensure it stays in the cover. The width of the contact plate is 2 mm to 10 mm, preferably 3 mm to 7 mm.

[0145] Holding and fixing is preferably carried out by the same contact plate, the contact plate of the closure cover, as the previously described contact (bayonet lock).

[0146] The cover also serves to seal the interior against splash water and, when installed, forms part of the outer surface in the rear area of ​​the handle.

[0147] The closure cap can have a cylindrical design extending in the longitudinal direction of the handle and / or a round, spherical end. Furthermore, notches can be provided on the outside of the closure cap, for example, to improve grip when turning.

[0148] The total length of the closure cap is 30 mm to 40 mm, preferably 33 mm to 36 mm. The length of the outer side (i.e., the part facing outwards after assembly) is 15 mm to 20 mm, preferably 17 mm to 19 mm. The length of the inner side (i.e., the part facing inwards after assembly) is 14 mm to 20 mm, preferably 15 to 17 mm (corresponding to the insertion length).

[0149] The outer diameter of the cover is 18 mm to 21 mm. The diameter of the first guide, i.e., the first part of the part located inside after assembly, is 13 mm to 17 mm. The diameter of the second guide, i.e., the second part of the part located inside after assembly, is 9 mm to 12 mm. Preferred mounting support element

[0150] When assembling the internal components in the hand body, the fully assembled support element is preferably inserted into the hand body first. The insertion takes place in the insertion direction R from the rear into the hand body, preferably parallel to the subsequent longitudinal axis of the handle AG. For the battery version, a battery is then inserted (additionally afterward) into the battery compartment of the support element. The cover cap is then applied to the rear end of the handle. The handle is then ready for use.

[0151] Twisting of the support element within the handle is prevented by the essentially rectangular or at least partially rectangular geometry of the support element (in cross-section) and suitable stops. Outwardly projecting cams are preferably arranged on the rearmost circumference of the support element and press against the inner surface of the hand body. This causes jamming. In addition, the cams press at least partially into soft component areas and thus jam. Two cams are preferably provided on the front and back, i.e. preferably a total of four cams are provided. The height of the cams, measured at their highest point, protrudes 0.3 mm to 0.6 mm, preferably 0.4 mm to 0.5 mm, from the surface from which they emerge. Their length forms a profile, with the height decreasing linearly towards the surface from which they emerge. The length of the cams (in the direction of insertion R) is 0.7 mm to 1.1 mm, preferably 0.8 mm to 1 mm.Basically, these cams can also be called barbs.

[0152] The support element can be positioned lengthwise using stops. On the one hand, the surface of the motor rests against the base body of the handpiece when mounted. On the other hand, there is a cross-sectional transition at the transition from the switch compartment to the adjacent compartment (at the end opposite the insertion direction), which also acts as a stop. This transition is designed on the left and right sides and is effective only there, not across the entire circumference.

[0153] Furthermore, the battery-powered version features a clamping mechanism below the battery on the support element. The support element features projections that clamp onto the base of the handpiece. Preferred mounting cover

[0154] For assembly, the cover cap is preferably inserted into the (rear) opening of the handset and turned (i.e. to close the circuit).

[0155] The insertion length is approximately 14 mm to 20 mm, preferably 15 mm to 17 mm. The rotation of the closure cap is between 30° and 60°, preferably between 40° and 50°.

[0156] Preferably, a rear stop surface on the base body of the handpiece interacts with a stop shoulder on the closure cap. The stop shoulder on the closure cap is preferably formed at the transition from the outside to the inside, i.e., at the transition from the part of the closure cap that is on the outside when assembled to the part that is on the inside.

[0157] The essentially cylindrical opening in the base body of the handpiece serves as an insertion and sealing counterpart for the closure cap.

[0158] The closure lid, in turn, preferably consists of a cylindrical part with a recessed groove, which is provided with a seal.

[0159] Furthermore, a stop shoulder at the rear end of the support element (i.e., within the hand body) preferably cooperates with another stop shoulder in the closure lid. This stop shoulder is formed at the inserted end of the closure lid.

[0160] The rearmost cylindrical part of the support element has longitudinal recesses into which the contact plate of the closure cover is inserted (i.e. to realize the bayonet closure).

[0161] The longitudinal recesses of the carrier element extend into lateral openings into which the carrier element contact plate is inserted. When the cover is rotated, contact is established between the contact plate of the cover and the carrier element contact plate, thus closing the circuit.

[0162] As described, the power supply for the functional elements in the handle is provided by a rechargeable battery or a replaceable battery.

[0163] For the rechargeable battery solution, the procedure for charging the battery is as follows: Remove the cover from a discharged or partially discharged device by twisting and then pulling. Then, connect a power adapter to the mains by inserting the power adapter plug into the socket on the handset. This initiates charging. After charging, remove the plug, replace the cover, and the device or handle is ready for use again.

[0164] The battery-powered solution is designed somewhat differently. If the battery is empty or insufficiently charged, the cover is also removed. The empty battery is then removed and replaced with another battery. The cover is reattached, and the device or handle is ready for use again. Preferred design plug-shaped coupling structure (interface handle)

[0165] The handle-side part of the interface according to the invention (i.e., the plug-shaped coupling structure) preferably has three steps. These three steps are arranged longitudinally one after the other. They each have clearly defined transitions or jumps, at least in the peripheral regions. The longitudinal axis of the plug-shaped coupling structure AK preferably runs parallel to the longitudinal axis of the handle AG. However, embodiments in which the two axes are collinear are also conceivable.

[0166] The first stage of the plug-shaped coupling structure preferably has a ramp-shaped threading path in its longitudinal cross-section. The second and third stages are preferably essentially constant in diameter, meaning there is no change in diameter within each stage. However, the individual stages are not always round or nearly round.

[0167] The plug-in coupling structure has a specific geometry at each stage. However, some geometric features continue across stages, which will be explained in detail below.

[0168] The length of the plug-shaped coupling structure, measured from the free end to the attachment point of the cam, is 20 mm to 40 mm, preferably 27 mm to 33 mm.

[0169] The insertion or insertion of a plug-in part into the plug-shaped coupling structure according to the invention can only take place in one position. In other words, a plug-in part cannot be inserted incorrectly or upside down.

[0170] The geometry of the first step, with preferably two essentially round or circular sections, prevents incorrect or reversed insertion into a plug-in part. The two sections have different diameters. A groove is arranged laterally between each of the two sections, resulting in a figure-eight-like shape for the first step when viewed from the front.

[0171] The diameter-related arrangement of the individual steps is preferably not concentric. The arrangement corresponds (approximately) to three cylinders resting roughly on a single surface. Viewed in cross-section, the following pattern emerges: The center point of the next step is always higher than the center point of the previous step (seen from the free end, i.e., from step 1 via step 2 to step 3). The individual steps are therefore oriented more "downward," or toward the back of the handle. However, their undersides are not entirely in line; rather, there is preferably a minimal gradation between the individual steps.

[0172] Preferably, the underside of the second step protrudes slightly over the underside of the first step and the underside of the third step protrudes slightly over the underside of the second step. Preferred design first stage

[0173] The first step is, as already mentioned, located at the free end of the plug-like coupling structure; it therefore also represents the first step when inserted into the opposite plug-on part.

[0174] The first step preferably has a longitudinal guide in the form of two lateral grooves, which represent the transitions between the two partial elements, so that in the frontal view the shape of the first step is similar to an 8-shaped figure.

[0175] The two sub-elements preferably have different diameters, with the upper sub-element of the first stage preferably having a larger diameter than the lower sub-element. The diameter of the sub-elements preferably remains substantially constant throughout the entire first stage. Whereas the cross-sectional area preferably increases from the free end almost to the end of the first stage (and remains constant only for a short transition area to the second stage).

[0176] The upper sub-element therefore defines, in the longitudinal direction together with the lead-in bevel, a ramp-like shape (i.e. for itself as well as for the first step as a whole).

[0177] As a further component of the longitudinal guide, a preferably square groove is formed in the upper side of the upper sub-element (preferably in its rear half, viewed in the longitudinal direction). Due to the ramp-like shape of the upper sub-element, this groove is not the same depth throughout. The depth increases towards the second step and preferably remains constant for a short transition area to the second step. The bottom of the groove is at the same distance from the longitudinal axis AG of the handle along its entire length. The change in depth is caused by the formation of the insertion bevel.

[0178] Furthermore, as a component of the longitudinal guide on the upper side of the upper sub-element, i.e. on the ramp-like shape, a further stabilizing element in the form of a substantially rectangular elevation can be integrated. This can serve to compensate for tolerances and improve clamping in the plug-on part. The shape is designed such that the elevation tapers away from the free end. The rectangular elevation has a width of 1.5 mm to 4 mm, preferably 2 mm to 3 mm, and a length of 3 mm to 8 mm, preferably 4 mm to 5 mm. The height of the element is between 0.1 mm and 2 mm, preferably between 0.2 mm and 1 mm.

[0179] On the underside of the first step or on the underside of the lower sub-element, a further groove of the longitudinal guide is provided, which runs consistently at least across the entire first step. This lower groove is preferably round in shape.

[0180] The first step thus provides an insertion bevel, which preferably does not extend across the entire first step. As already explained above, a flat section is provided in a short transition area to the second step. This results in the first step's essentially figure-8 shape when viewed from the front. The cross-section of the first step (i.e., viewed from the front) is preferably a mirror image, i.e., mirrored on the left and right sides in the longitudinal direction of the handle.

[0181] The diameter of the upper sub-element is 3 mm to 6 mm, preferably 4 mm to 5 mm. The diameter of the lower sub-element is 2 mm to 5 mm, preferably 3 mm to 4 mm. The distance between the circle centers is 2 mm to 4 mm, preferably 2.5 mm to 3 mm.

[0182] The length of the first step is 8 mm to 20 mm, preferably 10 mm to 15 mm. The height of the first step - at the free end - is 2 mm to 4 mm, preferably 2.5 mm to 3.5 mm, and - towards the handle - 4 mm to 8 mm, preferably 5 mm to 7 mm.

[0183] The width of the first step is - at the free end - 2 mm to 4 mm, preferably from 2.5 mm to 3.5 mm, and - towards the handle - 3 mm to 6 mm, preferably from 4 mm to 5 mm.

[0184] The geometric elements that continue between the first and second stages preferably include the groove on the top side. In conjunction with a plug-in part, this primarily serves to ensure correct insertion. A relatively large tolerance is preferably provided between a corresponding ridge of the plug-in part and the groove.

[0185] The groove on the underside also preferably continues between the first and second steps. This supports the correct guidance of the attachment. Both continuing grooves may also act as a twist lock. Preferred design second stage

[0186] The second stage of the plug-type coupling structure is arranged between the first and third stages.

[0187] It preferably has a substantially round basic shape in the form of an at least approximately straight cylinder. It primarily provides longitudinal guidance for the corresponding plug-in part.

[0188] The second step has a groove on its upper side, which, as described above, continues from the first step. The groove preferably extends the full length of the second step, i.e., to the transition from the second to the third step. The end of the groove forms a kind of stop. The groove has a depth between 1 mm and 3.5 mm, preferably between 2 mm and 3 mm. The groove corresponds to a corresponding round ridge on the underside of the interior of the corresponding plug-in part.

[0189] The second step also has a groove on its underside, which continues from the first step. This groove also extends the full length of the second step. Its depth is between 0.2 mm and 1.2 mm, preferably between 0.5 mm and 0.9 mm.

[0190] The second stage preferably further comprises a plurality of shallow recesses on its outer periphery, which function in particular as venting elements. They are intended to discharge the air in the cavity when the plug-on part is plugged onto the plug-like coupling structure. These shallow recesses preferably also extend over the entire length of the second stage.

[0191] Preferably, two circumferential recesses are arranged on the left side of the second step and, preferably in a mirror image, two recesses are arranged on the right side. However, more or fewer recesses can also be provided at equal spacing.

[0192] The width of the recesses preferably decreases slightly towards the third step, somewhat like an inlet slope.

[0193] Corresponding circumferential projections form between the recesses.

[0194] The depth of the recesses preferably also decreases slightly towards the third stage.

[0195] The width of the recesses is between 1.1 mm and 2.1 mm, preferably between 1.35 mm and 1.55 mm.

[0196] All four recesses are preferably identical in length (tapering to the outer radius of the second stage).

[0197] The depth of the recesses is between 0.1 mm and 0.6 mm, preferably between 0.2 mm and 0.4 mm.

[0198] The cross-sectional shape of the second step is generally rounded. At the front or free end of the second step, the cross-section begins with a chamfer, i.e., a slightly conical bevel or rounded portion. The length of the chamfer is preferably approximately 2 mm.

[0199] The length of the second step is 2 mm to 8 mm, preferably 4 mm to 6 mm. The diameter of the second step is 5 mm to 10 mm, preferably 6.5 mm to 8.5 mm. Preferred design third stage

[0200] The third stage of the plug-like coupling structure, which follows the second stage, forms the rearmost stage of the coupling structure and finally borders on the actual holding area in the handle itself.

[0201] In contrast to the previously mentioned stages, the third stage basically has no geometric elements that continue from a previous stage.

[0202] The third stage generally has a round basic shape, preferably in the form of a straight cylinder, which in turn provides longitudinal guidance. However, the third stage has a slanted end (i.e., with the handle). Since the diameter of the handle in the area of ​​the slanted end of the third stage is larger than the diameter of the third stage (or the aforementioned cylinder), a slanted stop surface is formed for a corresponding attachment. The stop surface is visible as a line in the side view.

[0203] A cam is preferably mounted on the underside of the third stage (i.e. the height of the cam is basically determined by the outside of the third stage and the outside of the handle outside the plug-type coupling structure).

[0204] The stop surface is at an angle α of 30° to 70°, preferably 45° to 55°, to the longitudinal axis of the handle AG or to the longitudinal axis of the plug-type coupling structure AK. The third step—and with it the entire plug-type coupling structure (i.e., the handle-side part of the interface)—is thus longer on the back than on the front.

[0205] The third stage also has several circumferential recesses (with corresponding circumferential projections between them) on its outer side, which in turn function as venting elements (similar to those of the second stage). Preferably, two such recesses (or projections) are formed on the right side and two on the left side of the third stage.

[0206] Preferably, the recesses (or projections) are arranged in a mirror-image manner (and particularly preferably offset by 90° from each other). These recesses (or projections) are also preferably arranged offset (in the circumferential direction) from the recesses (or projections) of the second stage. The recesses (or projections) each extend substantially over the entire length of the third stage.

[0207] The recesses decrease in width again, like an inlet slope.

[0208] The depth of the recesses is also designed to decrease or taper towards the handle. The depth is 0.2 mm to approximately 0.8 mm, preferably 0.35 mm to 0.6 mm (at the end, i.e., close to the stop surface, possibly 0 mm).

[0209] The width of the recesses is between 1.8 mm and 2.8 mm, preferably 2 mm to 2.3 mm.

[0210] The length of the recesses varies due to the angled stop surface. Any two recesses are the same, with the lower two being longer than the upper two.

[0211] The cross-sectional shape is essentially round or essentially circular.

[0212] The length of the third step at the top is 2 mm to 7 mm, preferably 3 mm to 5 mm. The length of the third step at the bottom is 8 mm to 17 mm, preferably 10 mm to 15 mm. The diameter of the third step is preferably between 7 mm and 14 mm, preferably between 9 mm and 11 mm.

[0213] The third step is generally designed to ensure a flush fit with the outside of the attachment, i.e., between the handle and the attachment. This creates a continuous outer shell surface. The third step also serves as a support surface for absorbing forces via the stop surface.

[0214] The electric motor is preferably positioned relative to the plug-type coupling structure such that the eccentric, viewed in longitudinal section, extends into the third stage. Preferably, the electric motor also extends, at least partially, into the area of ​​the third stage.

[0215] This is due to the slanted design of the third stage (back or bottom with the cam longer than the front or top).

[0216] The vibrations are therefore mainly generated in the area of ​​the cam or the snap connection with the plug-on part (i.e. the eccentric is preferably located in this area).

[0217] Mounting the motor near the interface provides significant advantages in vibration transmission. These advantages are particularly pronounced when the stop surface of the handle and the rotation axis AM of the electric motor, which is inclined relative to the longitudinal axis of the handle AG, form an angle φ between 35° and 90°, preferably between 50° and 70°.

[0218] The interaction of the aforementioned geometric elements on the handle with the corresponding elements on the brush head results in the following advantages: An inclined stop surface is contrasted with a straight insertion contour and direction R.

[0219] In this way, the resulting contact pressure or force resulting from the application can be optimally absorbed. This is essentially due to the larger contact area (i.e., compared to a "straight" cylindrical structure). This results in better transmission or a more distributed contact with less pressure.

[0220] Furthermore, when used on the front (e.g., as a toothbrush attachment), the attachment is pressed into the snap-in mechanism, meaning the force from use closes the connection mechanism. This creates a secure connection and prevents the attachment from coming loose or being torn away from the snap-in mechanism.

[0221] In addition, such an enlarged contact surface between the attachment and the handle results in significantly better vibration transmission.

[0222] For the anti-twist device provided according to the invention, corresponding elements are located at least on the first and second stages, making unintentional twisting or jamming virtually impossible. The anti-twist devices are further preferably combined, at least in part, with elements for an insertion or threading aid and, if necessary, a longitudinal guide.

[0223] The transitions between the steps also act as an anti-twist device, since the cross sections are not arranged concentrically.

[0224] The essentially 8-shaped cross-section of the first stage (i.e. the two sub-elements with different radii) together with the grooves on the top and bottom means that a corresponding plug-in part can only be plugged in one position.

[0225] In longitudinal section, the third stage of the plug-like coupling structure is at least partially overlapped by a soft component (e.g., TPE) of the hand body. The cross-section thus consists at least partially of a soft component. Preferably, however, the cross-section consists not only of a soft component, but of a combination of hard and soft components.

[0226] The soft component is preferably arranged at least on the front of the handle. This is particularly advantageous for cosmetic applications, since the handle is not held in the same way as with a toothbrush.

[0227] In yet another embodiment of the invention, the following is included: an attachment part for an electrical device for cleaning teeth, which can be applied to a handle, wherein the attachment part has a base region and a head region which are connected by a neck region, wherein the attachment part comprises a socket-like coupling structure which has at least two steps with different circumferential geometries and which forms the attachment-side part for an interface with a counter-identical, plug-like coupling structure of a handle.

[0228] The plug-in part according to the invention thus comprises a base region and a head region, which are connected by a neck region. Preferably, the base region and, if appropriate, a portion of the neck region comprise the socket-like coupling structure, i.e., the plug-in part-side portion of the interface.

[0229] This is designed in the same way for all applications or embodiments of the plug-on parts according to the invention (ie essentially the same as the plug-in coupling structure of the handle).

[0230] The bushing-like coupling structure is formed on the inside of the attachment parts and is preferably divided into three stages: a first stage (the counterpart to the third stage of the handle), a second stage (the counterpart to the second stage of the handle), and a third stage (the counterpart to the first stage of the handle). The recess for the handle cam is preferably formed starting from the inclined stop surface of the attachment part.

[0231] The first stage comprises circumferential recesses and circumferential projections. The recesses and projections are preferably formed symmetrically to one another, with the projections of the first stage of the attachment preferably engaging with the corresponding circumferential projections of the third stage of the handle. Accordingly, the corresponding recesses of the attachment and the recesses of the handle are also directly adjacent to one another, forming a hollow space between them.

[0232] In this respect, there is no (complete) equality between the first stage of the socket-type coupling structure and the third stage of the plug-type coupling structure.

[0233] The same applies to the second stage of the socket-like coupling structure, which in turn preferably has circumferential recesses and circumferential projections, wherein the circumferential projections of this second stage preferably engage with the circumferential projections of the second stage of the plug-like coupling structure of the handle. Accordingly, here too, the corresponding recesses of the plug-on part are also directly adjacent to the recesses of the handle part, forming a hollow space between them.

[0234] The cavities formed between the recesses serve to dissipate the air when the plug-on part is applied to the handset or the socket-like coupling structure is applied to the plug-like coupling structure.

[0235] The second stage of the socket-like coupling structure preferably has a square ridge on its upper side, which preferably corresponds in its design to the square groove of the plug-like coupling structure. The square ridge preferably continues from the second stage to the third stage of the socket-like coupling structure, so that it fully engages the square groove.

[0236] A round ridge is preferably arranged on the underside of the second stage of the socket-like coupling structure, which preferably corresponds to the round groove on the underside of the lower sub-element of the first and second stages of the plug-like coupling structure. The round ridge also preferably continues beyond the third stage of the socket-like coupling structure.

[0237] The round ridge also serves as a guide structure, but it can also have a technical impact. The round ridge achieves greater strength in thin-walled parts or relatively thin-walled parts, such as plug-in parts.

[0238] The third stage of the socket-like coupling structure preferably has an eight-shaped opening, on each side of which a tapered rib is preferably formed. The tapered ribs preferably correspond to or engage with the two grooves between the upper sub-element and the lower sub-element of the first stage of the plug-like coupling structure.

[0239] The coupling structure can also contain coupling elements or zones made of soft material. These can provide a certain preload within the coupling. The soft material can be provided on the plug-on part and / or the handle part.

[0240] The neck area of ​​the plug-on part according to the invention can be designed differently depending on the type of application (i.e., for example, with regard to length, angle, etc.) - but not with regard to the interface part.

[0241] The longitudinal axis of the plug-in part, AA, denotes the longitudinal axis of the socket-like coupling structure. This longitudinal axis lies in the base area of ​​the plug-in part. The longitudinal axis of the head area, AB, lies in the head area. The angle between AA and AB is denoted by Δ.

[0242] The angle Δ is usually between 10° and 30°, particularly preferably between 15° and 25°.

[0243] The head area of ​​the plug-on part according to the invention is basically designed differently for each type of application.

[0244] The attachment can also have zones made of soft material. These zones can simplify the feel, dampen vibrations, or indicate where the attachment is held (for example, for attaching or removing the handset).

[0245] The tolerances of the plug-on part according to the invention (ie in particular the base area) with respect to the handle are between 0 mm and 0.4 mm, preferably between 0.15 mm and 0.25 mm.

[0246] The attachment preferably features recessed grips, at least for certain tooth cleaning applications, to improve grip. These recessed grips can have zones made of soft material.

[0247] The grip recesses can be formed on one or more sides (e.g. always opposite each other on the attachment part; always opposite a functional element or the application side), depending on the position / arrangement of the functional elements of the head area.

[0248] The grip recesses are preferably designed as rounded or oval recesses (finger recesses). Furthermore, the grip recesses are preferably also provided with a structure (e.g., with knobs or slats), which can be made of hard and / or soft components. The grip recess, including its structure, can be made of hard and / or soft components.

[0249] Furthermore, it is possible to dispense with the actual recess and simply create a structure that improves grip. The structure can, for example, contain knobs, slats, etc. as the basic element. The shape / cross-section of the basic element can be round, oval, generally n-sided, banana-shaped, etc. The height of the individual element is between 0.2 mm and 2 mm, preferably between 0.5 mm and 1.5 mm.

[0250] The structure can incorporate several basic elements. These can be similar or different. The arrangement can be regular or irregular.

[0251] On a single attachment, several separate surfaces can be covered with structures, allowing, for example, different grip positions to be realized. A single such surface has a width of 4 mm to 12 mm, preferably 6 mm to 10 mm, and a length of 5 mm to 35 mm, preferably 8 mm to 22 mm.

[0252] Examples of applications for the recessed grips include cosmetic or hair removal applications, where the device needs to be guided more precisely, or oral hygiene and interdental cleaning, where precise guidance is also necessary. In general, the recessed grips are useful whenever the device needs to be held like a pen or when it needs to be held or maneuvered with particular precision. Preferred embodiments of plug-on parts Brush heads (or toothbrush heads)

[0253] Brush heads are particularly used for cleaning teeth.

[0254] In any case, since the base area (with the bushing-like coupling structure), as described above, is the same for all embodiments, it will not be described again here.

[0255] The head and neck areas can be designed in a variety of ways when using the brush head; in particular, different angles of the brush head and different brush heads themselves can be realized.

[0256] Protective elements can also preferably be provided in the head area. In a two-component attachment, these are made of a soft component, for example, and at least partially surround the brush head to cushion the impact of the attachment in the mouth.

[0257] With regard to the neck area, the angle relative to the longitudinal axis of the attachment part or the longitudinal axis of the brush head which corresponds to this, the cross-section of the neck area and the length of the neck area, ie the distance of the brush head to the handle, are preferably designed to be variable.

[0258] The brush head can be customized to meet different requirements using various bristle techniques (see above). A wide range of options are also available regarding the bristle arrangement within the bristle area, the bristles themselves, and the head size. A head cover can also be included as an accessory to protect the brush from contamination during storage, for example, in a beauty case. This applies to all types of attachments.

[0259] It is also possible to design tongue-cleaning elements on the back of the head, for example, in the form of nubs or lamella structures. These can also be used to clean the tongue during or after tooth brushing.

[0260] The length of the brush heads is generally between 50 mm and 100 mm, preferably between 60 mm and 90 mm and even more preferably between 70 mm and 80 mm. Interdental attachments

[0261] Interdental attachments vary in their direction of action. Depending on the needs, this can be along the longitudinal axis of the handle (AG) or perpendicular to the longitudinal axis. The vibration has a different effect depending on the direction. Here, too, the attachment can be a two-component attachment with protective or cleaning elements made of soft components (see above).

[0262] Various functional elements can be considered for the interdental attachment, in particular an interdental brush. This can be designed as a twisted brush or it can be a suitable injection-molded part (see, for example, WO 2014 / 005'659 A1). A toothpick (e.g., made of wood, overmolded, or mounted) can also be provided as a functional element. Furthermore, the interdental attachment can also be a so-called flosser—that is, a plastic part equipped with a piece of dental floss. See description below. Flosser attachments (or dental floss attachments)

[0263] Different directions of action can be implemented with flosser attachments. Depending on your needs, these can run along the longitudinal axis of the handle (AG) or perpendicular to the longitudinal axis. This means that the vibration has a different effect depending on the application, and the ergonomics of use also vary.

[0264] Here too, the attachment can be a two-component attachment with protective or cleaning elements made of soft components (see above).

[0265] The flosser attachment is designed to create a basic body consisting of a base section, a neck section, and a head section. The so-called flosser is then attached to the head section. Two holding arms, preferably made of a hard component, are formed between which a piece of interdental cleaning material, such as dental floss, is stretched.

[0266] The orientation is preferably such that the arms are aligned perpendicular to the longitudinal axis of the handle AG. Furthermore, the holding arms are preferably aligned so that the interdental cleaning element stretched between them runs parallel to the longitudinal axis. The holding arms are preferably molded in one piece with the hard component of the base body of the attachment. Alternatively, they can also be mounted, for example, in appropriately designed recesses in the base body.

[0267] The interdental cleaning element has a length between the holding arms of 15 mm to 25 mm, preferably 17 mm to 22 mm. The holding arms have a length, measured from the surface of the head area, of 8 mm to 20 mm, preferably 10 mm to 17 mm. This height preferably corresponds to the depth of the free space between the interdental cleaning element and the head area, measured perpendicular to the longitudinal axis of the handle AG.

[0268] The interdental cleaning element can be made of polyamide (PA), particularly PA6, PA6.6, PA6.10, PA6.12, polytetrafluoroethylene (PTFE), polyethylene (PE), or polyester. The interdental cleaning element can be coated or uncoated. Thus, the interdental cleaning element can be waxed or unwaxed. Suitable waxes include beeswax (Cera Alba), Cera Microcristallina, or Vinapas® from Wacker Chemie AG.

[0269] Furthermore, the interdental cleaning element can also be impregnated or have an additional coating. The impregnation or coating can serve to enhance the flavor (e.g., mint). Furthermore, the impregnation or coating can also contain an active ingredient such as fluoride (sodium fluoride or ammonium fluoride) or chlorhexidine.

[0270] Furthermore, the interdental cleaning element can also be a volume floss. This is characterized by a fiber core that puffs up or swells with use, thus becoming voluminous.

[0271] For the design of the actual functional element of the flosser attachment, reference is made to WO 2014 / 169398 A1.

[0272] For the interdental application of the attachments, i.e., for interdental attachments and flosser attachments, another design is conceivable / possible. An attachment can be designed that allows for the interchangeable attachment of an interdental brush / interdental cleaner or flosser (see options above). A base part of the attachment can be designed as a reusable part, and the brush / cleaning element / flosser itself can be interchangeable. This makes it possible to change the brush / cleaning element / flosser more often than the base part. In this case, the base part would comprise the base section, the neck section, and a head section with a holding mechanism.

[0273] The replaceable part, i.e. the interdental brush or the interdental cleaner, the flosser, can be designed in such a way that it can basically also be used without the base part - for example in manual, non-electrically assisted application.

[0274] Furthermore, the base can be designed so that the interdental brush, interdental cleaner, or flosser can be attached in various positions, for example, by using different holding directions for the holding mechanism. Tongue cleaner

[0275] Tongue cleaners are used in oral hygiene to clean the tongue. This device features an attachment with a tongue cleaner. In this case, the attachment serves only as a tongue cleaner and is not equipped with any other features, such as a bristle array.

[0276] The direction of action of the tongue cleaner is either along the longitudinal axis of the handle AG or transverse to the longitudinal axis of the handle AG , whereby the vibration has a different effect depending on the direction.

[0277] In the case of a two-component plug-in part, protective elements made of soft component can also be provided, which are arranged at least partially around the variable head and serve to dampen the impact of the plug-in part in the mouth.

[0278] Furthermore, the tongue cleaner is preferably equipped with cleaning elements made of one or more hard and / or soft components. The cleaning elements can be designed, for example, in the form of slats or surfaces with nubs.

[0279] If slats are used as cleaning elements, they can be made of one or more components. The slats can be made of a soft component, a hard component, or a combination thereof. The slats are preferably aligned perpendicular to the longitudinal axis of the handle (AG) (although a longitudinal orientation is also possible).

[0280] The tongue cleaner can also be designed as a multi-part attachment. The multi-part design can arise from the fact that one part or the entire cleaning structure does not need to be replaced at the same frequency as the base body / carrier, i.e. the part that provides the interface to the handle. For example, one part or the entire cleaning structure can be designed for single use. This means that the element intended for single use is changed again and again, while the rest of the product can be used multiple times, thus having a more frequent changeover frequency. For example, only the base body / carrier can remain in place for longer, or certain cleaning elements, such as slats, can be attached to the carrier and used for longer periods.

[0281] Examples of elements with a shorter service life include freshening strips made of degradable material (e.g., with water), i.e., elements that dissolve upon contact with water and thus release their active ingredient in one fell swoop. To ensure that these elements can be connected to the base body / carrier, they can either be designed in such a way that they can be attached directly, or they can be applied to an interface part in such a way that the interface part is mounted and replaced along with the element in question. Facial brushes

[0282] Another application type is facial brush attachments. These are used primarily for facial cleansing, massaging in creams and oils, and generally for massaging the skin.

[0283] In particular, the neck section is shorter than, for example, with plug-in toothbrushes. The treatment head is positioned practically above the interface, whereas with plug-in toothbrushes, the interface is regularly aligned with the treatment head. This means that the bristle area is positioned above the interface, and the interface extends at least partially below the bristle area.

[0284] The head area of ​​the facial brush is generally larger than that of the toothbrush head.

[0285] Together with the shortened neck area, the overall product still has a manageable length.

[0286] The length of the facial brush attachments is preferably between 30 mm and 60 mm, ie between 30 mm and 45 mm for a small size and between 45 mm and 60 mm for a large size.

[0287] The width of the facial brush attachments is preferably 20 mm to 60 mm, i.e. 20 mm to 35 mm for a small size and 35 mm to 60 mm for a large size.

[0288] The outer shape of the head area is preferably rounded and can be, for example, circular, elliptical, teardrop-shaped, round, kidney-shaped, or oval. Angular shapes are possible, but less preferred. For example, n-sided shapes are included. The facial brush attachments can generally comprise a plastic part as a support, on which various materials are arranged.

[0289] The head section can be designed to be flexible. Elements can be incorporated into the base body near the bristles to provide flexibility. This is a non-exhaustive list of possibilities: Notches or film hinges on the top and / or bottom. A thinner material connection allows for movement. Closed recesses from the top to the bottom. The recess can be designed, for example, as an enclosed slot. For example, a horseshoe-shaped section can be formed that surrounds an inner part equipped with the interface. This creates a flexible outer ring. Open recesses from the top to the bottom. For example, slots that are oriented towards the outer edge of the bristle field and are open there.

[0290] The recesses can be covered with a film of hard or soft material, always provided that some flexibility is still possible.

[0291] The surface into which the bristles are inserted is preferably a flat, continuous surface. However, the surface can also have a topography, such as a wave shape or longitudinal or transverse crowning. Furthermore, discontinuous shapes with surface discontinuities can be realized.

[0292] The bristle array (longitudinal bristle axis) is positioned at an angle to the handle's longitudinal axis. The angle between the bristle's longitudinal axis and the handle's longitudinal axis is 30° to 90°, preferably 50° to 70°.

[0293] The bristle field base surface is arranged at an angle of 0° to 50°, preferably 0° to 30°, to the rotation axis of the eccentric.

[0294] The longitudinal axes of the bristles are at an angle of 60° to 80°, preferably 50° to 90°, to the rotation axis of the eccentric.

[0295] The angle of the bristle array relative to the longitudinal axis, and thus also relative to the handle, is designed to facilitate ergonomic use. This angle allows the treatment area (skin) to be reached without touching the treatment area with the hand.

[0296] The extension of the interface or steps along the handle's longitudinal axis runs through the bristle area. The bristle area (i.e., the bristles) thus extends the interface and completely covers it (viewed along the longitudinal axis).

[0297] The back of the brush head is designed to extend beyond the rear surface of the brush head.

[0298] The facial brush attachment preferably has a flattened area on its back, which together with elements on the handle is intended to create a support for placing the product on a surface.

[0299] Furthermore, the facial brush attachment is designed so that it can be easily removed from the handle. This can be done, for example, by: Sidecut: as described in connection with the nail treatment attachment (nail care attachment). Holding geometry through the treatment element: the base of the bristle area can be designed to allow for a good grip. This can, for example, be considerably wider than the actual attachment geometry. This results in a jump in width, which in turn creates a sidecut, which contributes to better handling. Zones of soft material in the sidecut or intended holding geometry

[0300] The flexibility in the head area means that a certain part of the bristle field is statically connected to the handle via the attachment and that another part is flexible.

[0301] The static part accommodates between 10 and 40, preferably between 15 and 30, bristle holes / bristle bundles. The flexible part accommodates between 30 and 70, preferably between 35 and 55, bristle holes / bristle bundles.

[0302] The ratio of the number of bristle holes / bristle bundles on the static part to the number of bristle holes / bristle bundles on the flexible part is preferably 25% to 75%, preferably 40% to 60%.

[0303] The area of ​​the static part is between 400 mm2 and 800 mm2, preferably between 500 mm2 and 600 mm2. The area of ​​the flexible part is between 800 mm2 and 1500 mm2, preferably between 1100 mm2 and 1300 mm2.

[0304] The flexibility of the facial brush is designed so that a weight of 50 grams to 300 grams is applied to the tip to achieve movement.

[0305] The design of the static part is essentially the same width as the interface. Preferably the same width or wider, so that during the flexible movement, there is no contact with the rest of the body of the plug-on part.

[0306] Conventional bristle holes are preferred for the brush bristles. However, puck tufts are also conceivable (such as those used on makeup brushes according to US 2015 / 0034113).

[0307] Fine bristles (i.e., finer bristles than those used with a standard toothbrush) are preferred, with bristle diameters ranging from 0.075 mm to 0.225 mm. Extra-fine bristles have a diameter of less than 0.175 mm.

[0308] Generally speaking, facial brushes have more bristles than toothbrushes because the bristle diameters are much smaller and the brush head is larger and has more bristle holes.

[0309] The design of the bristle array can, for example, be such that a ring of one bristle type is placed around a field of another. Here, the term "bristle type" refers to bristles with specific properties (color, length, diameter, material, etc.). For example, soft bristle bundles can be arranged around hard bristle bundles.

[0310] It is also possible to use sprayed bristles for a massage head; however, these are less suitable for massaging in creams, etc.

[0311] However, for certain facial applications, a facial brush attachment (similar in shape) with a head section without bristles or bristle holes may also be provided. The head section is virtually identical, only the functional element on the head section differs. The attachment itself is made of the materials already mentioned, with the exception of the functional element.

[0312] The head area or the functional element can be made of metal or have a metal coating. The metal serves primarily to cool the skin. The metal can also have a structure or textured surface (e.g., nubby, grooved, or diamond-shaped) for massaging the skin.

[0313] The head area or the functional element can alternatively be made of stone or ceramic, which provides a special feeling of well-being while cooling the skin.

[0314] Furthermore, a facial brush attachment with a head area without bristles or bristle holes can also be provided with a sponge as a functional element, for example for applying creams.

[0315] Alternatively, a grinding attachment (possibly slightly larger) can be provided as a functional element, with which, for example, calluses (particularly on the feet) can be ground away.

[0316] In versions with metal or stone as the functional element, the head area can also be heated using a suitable heating element. A separate battery can be used for this, or a connection can be made via the interface (the interface is then equipped with appropriate contact elements to supply the functional element with power from the handset). Nail care attachment

[0317] For nail care, a nail care attachment or a set of nail care attachments can be provided.

[0318] The corresponding attachments or functional elements can be used as a nail brush for polishing painted nails or for polishing untreated nails (polishing brush) as well as for cleaning the nails of dirt or grease, especially under the nail edges (cleaning brush).

[0319] Furthermore, grinding and polishing attachments are provided for sanding the nail edges or for removing nail polish / glue / gel for extensions. Another version includes a nail polish brush for applying nail polish.

[0320] The neck and head area is designed differently depending on the type of application.

[0321] The nail brushes can be provided with injection-molded bristles, resulting in a multi-component attachment with a base body (preferably made of a hard component) and injection-molded bristles (preferably made of another component). In addition, additional elements can be realized as overmolded bodies, for example, made of hard and / or soft components.

[0322] Alternatively, bristles punched into the base body are also possible, whereby in such embodiments the base body can also be provided with further components as overmolded bodies.

[0323] Grinding or polishing attachments typically include a corresponding insert (i.e., containing grinding and / or polishing agents) in the body of the attachment. The insert can be designed to be replaceable, for example, using hook-and-loop or adhesive strips, etc., but it can also be permanently mounted in the body of the attachment, for example, using adhesive. Alternatively, grinding or polishing agents can be embedded directly in the plastic and processed during the injection molding process.

[0324] The mounting surface of the insert with the grinding or polishing surface can be realized on a flat surface in the body or slightly recessed into the body. A rim can form around the insert on the surface. This rim has a width of 0.1 mm to 0.7 mm, preferably 0.3 mm to 0.5 mm. The rim also has a height of 0.1 to 0.7 mm, preferably 0.1 to 0.4 mm. These values ​​are determined by the tolerances of the insert's positioning during production.

[0325] Furthermore, the grinding or polishing surface can also cover the entire flat surface and thus only end at the edge, virtually without a border.

[0326] The surface of the grinding or polishing attachments is preferably designed as a flat, continuous surface. It has a size of 30 mm² to 1800 mm², preferably 180 mm² to 750 mm². The length is 10 mm to 60 mm, preferably 30 mm to 50 mm, and a width of 3 mm to 30 mm, preferably 6 mm to 15 mm.

[0327] The shape of the actual grinding or polishing surface can be any closed contour. For example, circles, ovals, and n-gons can be realized.

[0328] The grain size of the grinding or polishing surface is between 100 µm and 5000 µm (grain size). Grains between 150 µm and 300 µm, between 350 µm and 450 µm, and between 3500 µm and 4500 µm are preferred. The grain size determines the function; deeper grains result in a coarser grinding or polishing surface, while higher grains result in a finer grinding or polishing surface.

[0329] The actual grinding or polishing surface can be designed as a flat, continuous surface. Continuity must always be maintained, but other continuous profiles can also be realized. For example, a concave, convex, or combined crown, a concave or convex longitudinal bend, a transverse bend, or even a wave shape.

[0330] The grinding or polishing surface can be positioned in various directions relative to the main axis of the handle. It can be aligned parallel or at various angles. Generally, the surface is preferably directed toward the back of the handle.

[0331] Grinding and polishing attachments usually have integrated grip recesses or structures that improve grip. These structures are arranged on the attachment to allow for precise maneuvering. The structures that improve grip are preferably located behind the applied tool, i.e., behind the grinding and polishing element.

[0332] To facilitate assembly and disassembly of the attachment on the handset, the carrier body, i.e., the base body of the attachment, is preferably tapered. This allows the body to be easily gripped and removed from the handset. The tapered shape is preferably designed so that, when the attachment is positioned on the handset, it extends between the left and right sides. The minimum cross-section has a width of 7 mm to 15 mm, preferably 8.5 mm to 11.5 mm. The tapered shape is preferably curved or has a continuous round shape.

[0333] A nail care attachment can have a means, preferably an edge, for pushing back the cuticles. The edge is designed as a relatively sharp edge. The edge has a usable length of at least 3 mm, preferably at least 5 mm, and is exposed to allow manipulation of the nails. This means that the edge must be sufficiently exposed at least in certain places to allow for treatment at all.

[0334] The edge, or the two surfaces leading to the edge, form an acute angle. The angle is less than 80°, preferably less than 60°.

[0335] The edge for the cuticle treatment can be flat or gradient. For example, it can be wavy to a certain extent.

[0336] The edge on the attachment part is preferably positioned symmetrically to the longitudinal axis.

[0337] On the attachment part, the scraping edge is preferably attached to the front, free end.

[0338] The bristles of a nail polish brush are arranged lengthwise or crosswise on the attachment.

[0339] The nail care attachments can be designed as individual attachments or as combined attachments. With combined attachments, the different sides of the attachment contain different functional elements. Mascara brush attachment

[0340] Twisted or molded brushes are preferred for mascara brush attachments. The direction of action is either along the length of the handle or across the handle's longitudinal axis, with the vibrations having a different effect depending on the direction.

[0341] The mascara brush attachments are designed in a similar way to the interdental attachments. Massage brush attachments

[0342] The massage brush attachments are generally similar in design to the facial brushes and feature a larger head. They are intended for massage applications on the entire body. Massage roller attachments

[0343] Massage roller attachments are designed in such a way that the attachment is equipped with a massage element, for example with one or more massage rollers or balls.

[0344] Generally, the rollers or balls are mounted on the attachment. Preferably, the rollers or balls are equipped with a pivot that allows rotation around the axis. The axis is anchored in the attachment and supports these elements. For ball elements, it is also possible to mount them in a ball guide, similar to a deodorant roll-on.

[0345] The axis of the massage balls can assume virtually any orientation relative to the longitudinal axis of the handle. The axis of the massage rollers preferably assumes a direction perpendicular to the longitudinal axis of the handle.

[0346] Massage rollers are preferably designed as straight cylindrical, truncated cone, or conical elements. The axis is aligned so that, in the case of a cylinder, it runs parallel to the cylinder axis, preferably centrally, but the arrangement can also be eccentric. In the case of a conical / truncated cone arrangement, the axis preferably runs parallel to the height, preferably centrally, but the arrangement can also be eccentric.

[0347] The massage roller can be designed so that the application surface is not smooth, but contains raised areas and / or depressions. Furthermore, the surface can be made of various materials, for example, single- or multi-component injection molding or metal.

[0348] The outer surface of the cylinder is preferably designed as an application surface. Application in this way allows for rolling on the skin. Furthermore, the free base area can also be designed as an application surface, allowing not only rolling but also spot application or rotation. Wet razor attachments

[0349] Finally, wet razor attachments are also available, which are used for wet shaving with vibration assistance. The attachment is preferably shaped like a blade holder.

[0350] The size of the inventive handle provides ergonomic advantages, especially for older users.

[0351] To change the blade, you can either replace the entire attachment (i.e., if the blade is permanently attached) or just the blade itself (i.e., if the blade is detachably attached). Changing the entire attachment offers advantages in handling, especially for older users. Sponge attachment

[0352] It is possible to create attachments for beauty applications in which a treatment element with a sponge-like structure is applied to the head area.

[0353] The size of the sponge-like structure can depend on the intended application area. For example, the sponge-like structures for facial application can differ significantly from those for applications on the rest of the body. For facial applications, a smaller structure is preferred.

[0354] The sponge-like structure can be created from a variety of materials with different pore sizes, etc.

[0355] It is also possible to arrange the sponge-like structure in the head area around the clip-on part. In this case, the actual body of the clip-on part, comprising the base area, neck area, and head area, forms the support structure inside the sponge-like structure.

[0356] All attachments can also be designed with flat spots, allowing the handle to be stored or laid down in a stable position with the attached attachment. These flat spots can, and must, of course, correspond to the flat spot(s) on the handle. Serum applicator attachment

[0357] For cosmetics, a serum applicator attachment can be designed, by means of which, for example, liquid or viscous media can be applied.

[0358] This plug-in part is preferably designed in such a way that a basic body of the plug-in part can be used for several applications and an interchangeable part is attached in the head area of ​​the plug-in part.

[0359] In addition to the medium, the interchangeable part can also include other elements for application, such as bristles or a sponge. This allows a separate part to be attached to the base body for use during the application and then discarded after use.

[0360] The medium can be integrated into the interchangeable part in various forms. For example, in the form of a sphere that dissolves upon contact with water, or as a sphere that is punctured. If the interchangeable part is mounted in this case, means are integrated into the base body that break open the sphere, allowing the medium to escape and be applied.

[0361] The aforementioned interchangeability of the functional element without changing the base body of the attachment can, in principle, not only be realized for interdental attachments and flosser attachments, as specifically described; its use is also conceivable in the field of cosmetic applications, as already described.

[0362] Overall, the present disclosure provides an electric tooth cleaning device or a universal handle for various tooth cleaning applications, to which attachments for a wide variety of applications can be attached.

[0363] For all applications, it is possible to design protective attachments, so-called quivers, which protect the attachment or the functional elements attached to it, such as bristles, from contamination. These head quivers are usually created as separately molded elements and are not directly connected to the attachment.

[0364] Furthermore, it is possible to create a base / holder for all applications in which the handle can be stored. For example, the holder can be designed so that the handle is placed vertically within it, with additional projections around the recess for the handle on which the attachments can be stored. This makes it possible, for example, to store the attachments for various applications together with the handle. The holder can be designed as a simple single-component or multi-component injection-molded part.

[0365] Furthermore, this base can be designed as a charger so that, for example, handles with rechargeable batteries in the base can be charged inductively.

[0366] Various plastics can be used to realize the electrical device according to the invention or the handle according to the invention and the attachment parts according to the invention.

[0367] Examples of possibilities in the field of thermoplastics include the following hard components: Styrene polymers such as styrene-acrylonitrile (SAN), polystyrene (PS), acrylonitrile-butadiene-styrene (ABS), styrene-methyl methacrylate (SMMA) or styrene-butadiene (SB); polyolefins such as polypropylene (PP) or polyethylene (PE), in particular in the form of high-density polyethylene (HDPE) or low-density polyethylene (LDPE); polyesters such as polyethylene terephthalate (PET) in the form of acid-modified polyethylene terephthalate (PETA) or glycol-modified polybutylene terephthalate (PETG), polybutylene terephthalate (PBT), acid-modified polycyclohexylenedimethylene terephthalate (PCT-A) or glycol-modified polycyclohexylenedimethylene terephthalate (PCT-G); Cellulose derivatives such as cellulose acetate (CA), cellulose acetobutyrate (CAB), cellulose propionate (CP), cellulose acetate phthalate (CAP) or cellulose butyrate (CB); polyamides (PA) such as PA 6.6, PA 6.10 or PA 6.12; polymethyl methacrylate (PMMA); polycarbonate (PC); polyoxymethylene (POM); polyvinyl chloride (PVC); polyurethane (PUR).

[0368] Examples of possibilities in the field of thermoplastic elastomers (TPEs) include the following soft components: Thermoplastic polyurethane elastomers (TPE-U); Thermoplastic styrene elastomers (TPE-S) such as styrene-ethylene-butylene-styrene copolymer (SEBS) or styrene-butadiene-styrene copolymer (SBS); Thermoplastic polyamide elastomers (TPE-A); Thermoplastic polyolefin elastomers (TPE-O); Thermoplastic polyester elastomers (TPE-E).

[0369] Furthermore, the aforementioned thermoplastics polyethylene (PE) and polyurethane (PU) can be used both as hard components and as soft components.

[0370] PP is particularly suitable as a hard component. PP with a modulus of elasticity of 1000–2400 N / mm 2 is preferred, and more preferably with a modulus of elasticity of 1300–1800 N / mm 2 .

[0371] TPE-S is preferred as the soft component. The Shore A hardness of the soft component is preferably below 90 Shore A. The soft components form a material bond with the hard component by overmolding in a two- or multi-component injection molding process.

[0372] Example materials for the production of injected bristles include: polyamide elastomer (e.g. Grilflex ELG 5930 from Ems-Chemie AG); polyester elastomer (e.g. Riteflex 672 RH Nat or Riteflex RKX 193 RF Nat from Ticona Polymers or Hytrel 7248 from DuPont). The bristle materials for the injected bristles have a Shore A hardness of 0 to 100, preferably 30 to 80 Shore A.

[0373] Conventional bristles (pointed or cylindrical) are preferably made of polyamide (PA) or polyester (PBT).

[0374] Rubber-elastic massage and cleaning elements are made of a soft component.

[0375] Bioplastics, i.e. plastics made from renewable raw materials, can also be used in principle.

[0376] A particularly preferred hard component for the inventive attachments is PP Tipplen R359 from TVK Plc. (Tippeln is a trademark of TVK Plc.). A particularly preferred hard component for the inventive handle is Total PPH 5042 from Total SA (Total is a trademark of Total SA) or, alternatively, Moplen HP548L from LyondellBasell Industries Holdings BV (Moplen is a trademark of LyondellBasell Industries Holdings BV).

[0377] The accompanying figures are intended to illustrate possible embodiments of the present invention by way of example and solely for illustrative purposes. The individual embodiments may be combined in whole or in part with other embodiments of the invention without departing from the scope of the invention. Likewise, the following description of the individual figures can be applied to other figures showing the same or similar embodiments and possibly described in less detail.

[0378] It shows: Fig. 1a a perspective view of a first embodiment of an electrical device according to the invention for cleaning teeth; Fig. 1b a side view of the electrical device according to the invention according to Fig. 1a ; Fig. 1c a plan view of the electrical device according to the invention according to Fig. 1a ; Fig. 1 bottom view of the inventive electrical device according to Fig. 1a ; Fig. 1e a cross-sectional view of the electrical device according to the invention according to Fig. 1a ; Fig. 1f a cross-sectional view of a second embodiment of an electrical device for tooth cleaning according to the invention; Fig. 2a a perspective view of a handle according to the invention; Fig. 2b a perspective view of the handle according to the invention rotated by 180° according to Fig. 2a ; Fig. 2c a side view of the inventive handle according to Fig. 2a ; Fig. 2 top view of the inventive handle according to Fig. 2a ; Fig. 2e a bottom view of the inventive handle according to Fig. 2a ; Fig. 2 fine cross-sectional view of the inventive handle according to Fig. 2a (according to the Fig. 1e illustrated embodiment of the electrical device according to the invention); Fig. 3a a perspective view of a first embodiment of an attachment part according to the invention; Fig. 3b a side view of the attachment part according to the invention according to Fig. 3a ; Fig. 3c a plan view of the plug-on part according to the invention according to Fig. 3a ; Fig. 3 bottom view of the plug-on part according to the invention according to Fig. 3a ; Fig. 3e a rear view of the plug-on part according to the invention according to Fig. 3a ; Fig. 4 a side view of a second embodiment of an attachment part according to the invention; Fig. 5 a side view of a third embodiment of an attachment part according to the invention; Fig. 6 a side view of a fourth embodiment of an attachment part according to the invention; Fig. 7a a perspective view of a fifth embodiment of an attachment part according to the invention; Fig. 7b a further perspective view of the attachment part according to the invention according to Fig. 7a ; Fig. 7c a plan view of the plug-on part according to the invention according to Fig. 7a ; Fig. 7a side view of the plug-on part according to the invention according to Fig. 7a ; Fig. 8a a perspective view of a sixth embodiment of an attachment part according to the invention; Fig. 8b a side view of the attachment part according to the invention according to Fig. 8a ; Fig. 8c a bottom view of the plug-on part according to the invention according to Fig. 8a ; Fig. 8a top view of the plug-on part according to the invention according to Fig. 8a ; Fig. 9a a side view of a seventh embodiment of an inventive plug-on part; Fig. 9b a top view of the inventive plug-on part according to Fig. 9a ; Fig. 9c a bottom view of the plug-on part according to the invention according to Fig. 9a ; Fig. 10a a side view of an eighth embodiment of a plug-on part according to the invention; Fig. 10b a top view of the plug-on part according to the invention according to Fig. 10a ; Fig. 11a a side view of a ninth embodiment of an attachment part according to the invention; Fig. 11b a top view of the attachment part according to the invention according to Fig. 11a ; Fig. 12a a side view of a tenth embodiment of an inventive plug-on part; Fig. 12b a top view of the inventive plug-on part according to Fig. 12a ; Fig. 12c a bottom view of the plug-on part according to the invention according to Fig. 12a ; Fig. 13a a side view of an eleventh embodiment of a plug-on part according to the invention; Fig. 13b a top view of the plug-on part according to the invention according to Fig. 13a ; Fig. 13c a bottom view of the plug-on part according to the invention according to Fig. 13a . Fig. 14a a perspective view of the plug-on part according to Fig. 7a on a handle; Fig. 14b side view of the plug-in part according to Fig. 7a on a handle; Fig. 14c a cross-sectional view of the plug-on part according to Fig. 7a on a handle; Fig. 15a a perspective view of a twelfth embodiment of an attachment part according to the invention; Fig. 15b a side view of the attachment part according to the invention according to Fig. 15a ; Fig. 15c a front view of the plug-on part according to the invention according to Fig. 15a ; Fig. 15a top view of the plug-on part according to the invention according to Fig. 15a ; Fig. 16a a perspective view of a thirteenth embodiment of an attachment part according to the invention on a handle; Fig. 16b a bottom view of the attachment part according to the invention on a handle according to Fig. 16a ; Fig. 16c a side view of the plug-on part according to the invention on a handle according to Fig. 16a ; Fig. 16a top view of the inventive plug-on part on a handle according to Fig. 16a ; Fig. 16e a cross-sectional view of the plug-on part according to the invention on a handle according to Fig. 16a ; Fig. 17a a perspective view of a fourteenth embodiment of an attachment part according to the invention; Fig. 17b an exploded view in perspective view of the attachment part according to the invention according to Fig. 17a ; Fig. 17c an exploded view in plan view of the plug-on part according to the invention according to Fig. 17a ; Fig. 18a a perspective view of a fifteenth embodiment of an inventive plug-on part; Fig. 18b a side view of the inventive plug-on part according to Fig. 18a ; Fig. 18c a plan view of the plug-on part according to the invention on a handle according to Fig. 18a Fig. 18a front view of the plug-on part according to the invention according to Fig. 18a ; Fig. 19a a perspective view of a sixteenth embodiment of an attachment part according to the invention; Fig. 19b a side view of the attachment part according to the invention according to Fig. 19a ; Fig. 19c a plan view of the plug-on part according to the invention according to Fig. 19a ; Fig. 19 bottom view of the plug-on part according to the invention according to Fig. 19a .

[0379] In the Fig. 1a a perspective view of a first embodiment of the electrical device according to the invention for cleaning teeth, here in the form of an electric toothbrush, is shown.

[0380] The electric toothbrush essentially consists of the handle 1 consisting of the handle part 1c and the closure cover 35, as well as the attachment part 60. The handle part 1c essentially consists of the base body 5, which comprises at least one hard component 1a, as well as the overmolded body, which comprises one or more soft components 1b, 1b', and the inner workings.

[0381] In the present case, in particular the switch section 2, parts of the front section 3 and the back section 3a (cf. Fig. 1d )formed from a soft component 1b'. Furthermore, a section made of soft component 1b is formed on the front. This can be the same soft component in each case, but different soft components can also be used as needed. Regarding the materials in question, reference is made to the general description above.

[0382] The on / off switch symbol 4 for the electric toothbrush is also located in the area of ​​the switch section 2. The on / off switch symbol 4 represents the point that must be pressed to activate the switch 24 inside the handle. The front section 3 comprises two or more webs 57, which are formed from the hard component 1a and, together with the surrounding soft component 1b' of the front section 3, provide a particularly good grip. The attachment part 60, here in the form of a toothbrush attachment, is connected to the front section 3.

[0383] The plug-on part comprises a base region 61, with which it connects to the main body 5 made of the hard component 1a of the handle 1 or to the plug-like coupling structure 40 of the handle 1, as well as a head region 63 and a neck region 62 connecting the base region 61 to the head region 63.

[0384] In the present case, a carrier plate 65 is mounted in the head region 63, with cleaning elements 64 arranged thereon. The cleaning elements 64 can be bristles or bristle bundles and / or soft-elastic cleaning and massage elements (these are preferably formed or injection-molded from a soft component). The bristles or bristle bundles are preferably applied using the AFT (anchor-free tufting) process.

[0385] The Fig. 1b shows a side view of the electric toothbrush according to Fig. 1a The longitudinal axis of the handle 1 is denoted by AG in this illustration. The transition area between the handle 1 and the attachment part 60 comprises an inclined stop surface 44, which forms an angle α with the longitudinal axis AG of the handle. Due to the angle, this angle is visible as a line in the present illustration.

[0386] The length from the stop surface 44 to the end of the handle (on the front or top side of the handle 1c without the closure cover 35) is designated L 6 and the length from the stop surface 44 to the end of the handle (on the back or bottom side of the handle 1c without the closure cover 35) is designated L 7 , whereby L 6 > L 7 always applies.

[0387] The cover 35 has notches 36 at its rear end, which serve to prevent the user's fingers from slipping when twisting the cover 35. At its highest point, in the area of ​​the front section 3, the handle 1 has a maximum height H 1. The on / off switch symbol 4 can be seen in the area of ​​the switch section 2.

[0388] The Fig. 1c shows a plan view of the electric toothbrush according to the invention according to Fig. 1a One can again see the attachment part 60, the handle 1c and the closure cover 35.

[0389] In the transition area from the handle 1c to the closure cover 35, the markings 6 and 7 are provided on the handle 1c side and the marking 37 is provided on the closure cover 35 side. The two triangular markings 6 and 37 are directly opposite each other, which in this case means that the corresponding contact plates of the handle 1c and the closure cover 35 are in contact, which will be explained in more detail below.

[0390] If the closure cover 35 is rotated so that the markings 7 (on the side of the handle 1c) and 37 (on the side of the closure cover) are opposite each other, this means that the corresponding contact plates of the handle 1c and the closure cover 35 are not in contact.

[0391] Furthermore, it can be seen that the upper side of the handle 1 is predominantly formed from the soft component 1b and also has a soft component 1b' in the area of ​​the switch section 2 and in the area of ​​the front section 3. The soft component 1b' of the front section 3 extends to the end of the handle, and the markings 6 and 7 are applied in the area of ​​this soft component 1b'. The webs 57 are formed from the hard component 1a.

[0392] Approximately in the middle of the handle 1, it has a waist 11, which in turn improves the grip of the electric toothbrush (i.e. the ergonomics are optimized and the toothbrush lies better in the hand).

[0393] In Fig. 1d a bottom view of the electric toothbrush according to the invention is shown Fig. 1a It can be seen that the closure cap 35 also has a triangular marking 38 on its back. Notches 36 are also present on the back of the closure cap 35. The closure cap 35 is constructed with mirror symmetry, and since it can be attached to the handle 1c in two positions, the triangular marking 38 and the notches 36 (which are arranged around the closure cap 35) are also visible on the back.

[0394] The handle 1c has a flat area 10 on its rear side, which serves as a stable support for the handle 1c or the electric toothbrush. Behind the flat area 10, i.e., in the direction of the closure cover 35, the handle 1c has its maximum width B 1. The rear side of the handle 1c is predominantly formed from the hard component 1a, but the rear side also includes areas provided with a soft component 1b', namely the back section 3a and the end of the handle 1c.

[0395] The soft component 1b' in turn serves to improve the grip of the electric toothbrush, for example by preventing the index finger from slipping so easily when holding the handle 1.

[0396] In the transition area from handle 1 to the base section 61 of the attachment 60, a cam 45 is located on the handle 1 side, which engages with a corresponding recess 67 on the side of the attachment 60. These two elements (cam 45 and recess 67) can be used to increase or adjust the trigger weight for the brush head for safety reasons. The trigger weight is adjusted depending on the tolerance between the two elements and the corresponding material selection.

[0397] The Fig. 1e shows a cross-sectional view of the electric toothbrush according to the invention according to Fig. 1a . This is the battery version. A support element 12 is arranged inside the base body 5 or the hand body 1d, on or at which all essential components of the electric drive are located.

[0398] The closure cover 35 of the electric toothbrush is attached to the handle 1c. The closure cover 35 has a cover cavity 35a into which the battery terminal 39a of the battery 39 extends. To contact the battery terminal 39a, the closure cover has a contact plate 35b with a spring plate element 35c. The contact plate 35b lies transversely to the cover cavity 35a and at least partially closes it. The contact plate 35b is held laterally of the cover cavity 35a in a recess in the corresponding side wall and in the adjacent side wall. The contact plate 35b cuts into the side wall to hold it, creating a frictional connection. The spring plate element 35c of the contact plate 35b is directed toward the battery 39 and thus contacts the battery terminal 39a.

[0399] The contact plate 35b then makes contact with the carrier element contact plate 17 so that the circuit is closed.

[0400] A sealing ring 34 is arranged on the outside of the closure cover 35, which helps seal the interior of the handle against splash water, etc. The area of ​​the support element 12, which overlaps with the front area of ​​the closure cover 35 at the rear end of the handle, is referred to as the connection compartment 23.

[0401] In the insertion direction R, after the connection compartment 23, the battery compartment 21 of the carrier element 12 is arranged, into which a battery 39 is inserted. The front pole of the battery 39 touches the contact tongue 33 of the corresponding battery contact plate 32. The battery contact plate 32 is arranged in the contact plate compartment 20 of the carrier element 12, which is located directly after the battery compartment 21 in the insertion direction R. The battery contact plate 32 is also connected to the printed circuit board 25.

[0402] The carrier element contact plate 17, which is also connected to the printed circuit board 25, is also arranged, at least partially, within the contact plate compartment 20, wherein the carrier element contact plate 17 then runs further along the lower outer side of the carrier element 12 along the battery compartment 21 and is guided further radially on the outer side of the connection compartment 23 in a semicircular manner along the outer circumference of the carrier element 12 or the connection compartment 23, where it projects into openings in the outer side of the connection compartment in order to interact with the contact plate 35b of the closure cover 35 in the manner of a bayonet closure known per se (not shown here).

[0403] In the insertion direction R, after the contact plate compartment 20, the switch compartment 19 is provided, in which the switch 24 is arranged, which is operated by pressing the on / off switch symbol 4 of the switch section 2. The switch 24 is mounted directly on the printed circuit board 25.

[0404] In the insertion direction R after the switch compartment 19, a cable bushing 18a is provided for the cables which run from the rear side of the electric motor 14 to the underside of the printed circuit board and are soldered there accordingly (the cables are not visible in the illustration).

[0405] Finally, the electric motor 14 is arranged in the motor compartment 18 of the support element 12, specifically at an inclination defined by the slope 12a of the support element 12, on which the underside of the electric motor 14 rests. The front side or leading edge of the electric motor 14 rests against a front motor stop 27 of the support element 12, and the rear side of the electric motor 14 rests against the rear motor stop 28 of the support element 12.

[0406] The eccentric 15, arranged on the rotation axis AM of the electric motor 14, extends beyond the front motor stop 27 and into the base area 46 of the plug-type coupling structure 40. This arrangement has proven particularly efficient for vibration transmission.

[0407] In the present cross-sectional view, it can also be seen how the plug-like coupling structure 40 of the handle and the oppositely designed, socket-like coupling structure 70 of the plug-on part 60 form the interface X between the handle 1 and the plug-on part 60.

[0408] In the head area 63 of the plug-on part 60, the carrier plate 65 can be seen, on which the cleaning elements 64 are arranged.

[0409] Regarding the specific dimensions, materials and other features, please also refer to the general description of the battery version above.

[0410] In the Fig. 1f A cross-sectional view of a second embodiment of the electric toothbrush according to the invention is now shown, namely the battery version.

[0411] Here, too, the closure cover 35 is mounted on the rear end of the handle 1c. The contact element 31 of the socket 30 protrudes into the cover cavity 35a of the closure cover 35, again in the area of ​​the connection compartment 23, which is formed in the area of ​​the overlap between the support element 12 and the front end of the closure cover 35.

[0412] On the outside of the closure cover 35, a sealing ring 34 is arranged, which helps protect the interior of the handle 1 from splashing water, etc. The bushing 30 is firmly arranged in the bushing compartment 22 of the support element 12, which largely encloses the bushing 30. The bushing compartment 22 also has a front stop 31b for the bushing 30, with the rear side of the bushing 30 abutting against it. The front stop of the bushing 30 in the insertion direction R is designated 31b.

[0413] On the carrier element 12 above the carrier element contact plate 17 there is also a seal 29 (ie . A sealing ring is attached, which further seals the interior against splash water. Furthermore, this seal 29 also dampens unwanted vibrations.

[0414] At the front end of the socket 30 (the actual rear side of the socket 30) in the insertion direction R are two socket connections 30a, which are connected to the printed circuit board 25 via cables (not shown). The battery 58 is firmly mounted or soldered onto the printed circuit board 25 and is thus mounted on the carrier element 12 and rests at least partially directly against it. Several locking lugs 26 are provided on the underside of the carrier element 12, with which the printed circuit board is held to the carrier element 12.

[0415] Following the battery compartment 21a is the switch compartment 19. The switch 24 is also mounted directly on the printed circuit board 25 and is preferably soldered there five times. This embodiment also provides a cable feedthrough 18a through which cables are routed from the rear end of the electric motor 14 to the printed circuit board 25.

[0416] The cable entry 18a is slightly shorter than the corresponding cable entry 18a in the battery version. Accordingly, the switch compartment 19 is slightly longer in the battery version. In the motor compartment 18, the electric motor 14 is arranged at an angle and is supported on its underside by the slope 12a of the support element 12. .

[0417] The eccentric 15 mounted on the rotation axis AM of the electric motor in turn projects beyond the front motor stop 27 and projects into the base area 46 of the plug-type coupling structure 40 (ie . as with the battery version described above).

[0418] In the battery version, too, the plug-like coupling structure 40 and the essentially oppositely designed, socket-like coupling structure 70 define the interface X. The head region 63 of the toothbrush attachment part 60 is designed somewhat differently in this embodiment than in the battery version.

[0419] Instead of a carrier plate mounted in the head area with bristles or bristle bundles of the cleaning elements 64 applied using the AFT process, the bristle bundles 64 are 'punched directly into the head area 63 using the conventional method. Furthermore, the longitudinal axis of the head area AB is less inclined compared to the longitudinal axis of the handle AG. However, the toothbrush attachment of the battery-operated version can also be used in the battery-operated version. Further details on the corresponding attachment can be found in the description of Fig. 4 to find, the corresponding plug-in parts correspond.

[0420] Regarding the specific dimensions, materials and other features, please also refer to the above general description of the battery version.

[0421] In Fig. 2a A handle 1 according to the invention, i.e. a handle part 1c with a closure cover 35 but without an attachment part 60, is now shown in a perspective view.

[0422] In particular, the inclined stop surface 44 of the handle 1 is visible, to which the front section 3 with its combination of hard and soft components adjoins. The plug-like coupling structure 40 protrudes horizontally from the inclined stop surface 44, i.e., essentially parallel to the longitudinal axis AG of the handle 1. This is divided into three stages: the first stage 41 at the free end, the second stage 42, and the third stage 43, which merges into the inclined stop surface 44.

[0423] The first step 41 is divided into an upper sub-element 47 and a lower sub-element 48. The first step 41 rises in a ramp-like manner toward the second step. Approximately halfway along the first step 41, a square groove 50 begins, which also continues across the entire second step 42 until it reaches the third step 43.

[0424] Viewed from the front, the upper and lower sub-elements 47, 48 together have an approximately tooth-shaped outline (at the free end), which assumes an approximately figure-eight shape toward the handle at the end of the first step. The second step 42 and the third step 43 are essentially round and essentially cylindrical.

[0425] The Fig. 2b illustrates a perspective view of the handle 1 rotated by 180 ° according to Fig. 2a . One can first recognize the flat area 10 for resting the handle 1 as well as the back section 3a, which, in contrast to the flat area 10, is formed from a soft component 1b.

[0426] A vent hole 8 is also provided at the end of the back section 3a facing the closure cover 35 (applies to all embodiments). Gases from the interior of the handle 1 can escape through this vent hole 8.

[0427] From the inclined stop surface 44, the cam 45 originates on the underside of the handle 1 and covers approximately one third of the length of the underside of the third step 43.

[0428] A round groove 51 is provided on the underside of the lower sub-element 48 of the first stage 41, which continues over the entire second stage 42. The square groove 50 on the upper side of the upper sub-element 47 and the round groove 51 on the lower side of the lower sub-element 48 serve in particular to ensure secure and twist-free insertion into the corresponding socket-like coupling structure 70 of a plug-on part 60 according to the invention.

[0429] The Fig. 2c is a side view of the inventive handle 1 according to Fig. 2a .The cam 45, a circumferential projection 56 of the third stage, and a circumferential recess 55 of the third stage can again be seen on the underside of the third stage 43. The second stage 42 also has circumferential projections 54 and circumferential recesses 53, which are generally offset from the circumferential projections and recesses of the third stage 43. Furthermore, the longitudinal axis AK of the plug-like coupling structure 40 is offset parallel to the longitudinal axis AG of the handle 1.

[0430] The first step also has a groove 49 extending between the upper sub-element 47 and the lower sub-element 48, which extends over the entire length of the first step 41. The groove 49 is approximately in the form of a notch, resulting in the figure-eight shape, particularly of the rear end of the first step.

[0431] In the top view according to Fig. 2d It can be seen that the angular groove 50 begins approximately halfway through the first step 41 or the upper sub-element 47 and continues to the stop at the third step 43. In addition, the circumferential recesses 55 and the circumferential projections 56 of the third step can be seen again.

[0432] From the Fig. 2e The bottom view of the handle 1 according to the invention shown shows the length ratios of the individual steps of the plug-like coupling structure 40 of the handle 1. The first step 41 has a length L 1 , the second step 42 has a length L 2 , and the third step 43 has a length L 3 on the top side and a length L 3' on the bottom side. The first step 41 is longer than the second step 42 and approximately the same length as the third step 43 on its bottom side. The third step 43 is correspondingly longer on its bottom side than the second step 42, but slightly shorter than the second step 42 on its top side.

[0433] On the underside of the third step 43, the cam 45 is again visible, which is divided into the stem 45a and the crown 45b. This design ensures particularly good locking with the counter-shaped recess 67 of the attachment part 60.

[0434] The back section 3a again has the vent hole 8 at its end facing the closure cover 35. Furthermore, the waist 11 and the flat area 10 can be seen.

[0435] The maximum diameter of the closure cover 35 is designated DV. The length of the inventive handle 1 with closure cover 35, measured from the free end of the plug-like coupling structure 40 to the rear end of the closure cover 35, is designated L 4 , and the total length of the handle 1 without the closure cover, i.e., measured from the free end of the plug-like coupling structure 40 to the rear end of the handle, is designated L 5 .

[0436] Regarding the specific dimensions, materials and other features, please also refer to the general description of the handle above.

[0437] The Fig. 2f is a cross-sectional view of the inventive handle according to Fig. 2a and corresponds to the Fig. 1e (only without attachment 60). Additionally, the total length of the closure cap is designated here, namely L 8 . Furthermore, it is shown that an angle β is formed between the longitudinal axis of the handle AG and the rotation axis of the electric motor AM, which angle corresponds to the inclination of the electric motor 14.

[0438] By embedding the eccentric 15 in the base area 46 of the plug-type coupling structure 40, a particularly efficient vibration transmission can be achieved. Furthermore, the rotation axis AM of the electric motor 14 forms an angle φ with the stop surface 44 of the handle 1, which is also tuned for optimal vibration transmission (see specific figures in the general description above).

[0439] Furthermore, it can be seen that the venting membrane 9 is provided at the point where the carrier element contact plate 17 is attached to the printed circuit board 25. This membrane prevents gases from outside from penetrating the interior of the handle 1. The remaining reference numerals designate the same components, as in all other embodiments.

[0440] Fig. 3a Illustrates a perspective view of a first exemplary form of an attachment 60 according to the invention for a toothbrush. This attachment, in turn, has a base region 61 and a head region 63, which are connected by a neck region 62. In this embodiment, a carrier plate 65 is mounted in the head region 63, on which the cleaning elements 64 are arranged (AFT process).

[0441] The Fig. 3b is a side view of the inventive attachment part 60 for a toothbrush according to Fig. 3a . It can be seen that in this embodiment, the base region 61 (or the base region 61 and the neck region 62) form an angle with the flat head region 63. The angle is defined as the angle between the longitudinal axis of the plug-on part AA and the longitudinal axis of the head region AB and is denoted by Δ. The dimensions for the angle can be found in the above description.

[0442] Fig. 3c shows a plan view of the inventive attachment part 60 for a toothbrush according to Fig. 3a . The cleaning elements 64, which are arranged on the carrier plates 65, can also be seen. Furthermore, the inclined stop surface 66 on the base area 61 of the toothbrush attachment 60 can be seen. The recess 67 of the toothbrush attachment 60, which is designed in the opposite direction to the cam 45 of the handle 1, is bordered on the inside by circumferential recesses 76.

[0443] The Fig. 3d is a bottom view of the inventive attachment 60 for a toothbrush. The head region 63, the neck region 62, and the base region 61 with the recess 67 are again visible.

[0444] Fig. 3e is a rear view of the attachment part 60 according to the invention for a toothbrush, ie the interior of the attachment part 60 for a toothbrush is illustrated.

[0445] The interior essentially comprises the bushing-like coupling structure 70, which is correspondingly divided into three stages: the first stage 71 (the counterpart to the third stage of the handle), the second stage 72 (the counterpart to the second stage of the handle), and the third stage 73 (the counterpart to the first stage of the handle). Also visible is the recess 67 for the cam 45 of the handle 1, formed by the inclined stop surface 66.

[0446] The first stage comprises circumferential recesses 76 and circumferential projections 77. The recesses and projections are formed symmetrically to one another, with the projections 77 of the first stage 71 of the plug-on part 60 engaging the corresponding circumferential projections 56 of the third stage 43 of the handle 1. This ensures that the air can escape when the plug-on part is attached to the coupling structure 40 of the handle 1.

[0447] In this respect, there is no (complete) mutual similarity between the first stage 71 of the socket-like coupling structure 70 and the third stage 43 of the plug-like coupling structure 40. The same applies to the second stage 72 of the socket-like coupling structure 70, which in turn has circumferential recesses 78 and circumferential projections 79, wherein the circumferential projections 79 of this second stage 72 engage the circumferential projections 54 of the second stage 42 of the plug-like coupling structure 40 of the handle 1. This configuration also serves for ventilation.

[0448] However, the second step 72 of the socket-like coupling structure 70 has a square ridge 74 on its upper side, the design of which corresponds to the square groove 50 of the plug-like coupling structure 40. The square ridge 74 continues from the second step 72 to the third step 73 of the socket-like coupling structure 70, so that it can fully engage the square groove 50 of the plug-like coupling structure 40 of the handle 1.

[0449] On the underside of the second step 72 of the socket-like coupling structure 70, a round ridge 75 is arranged, which corresponds to the round groove 51 on the underside of the lower sub-element 48 of the first step 41 of the plug-like coupling structure 40. The round ridge 75 also continues beyond the third step 73 of the socket-like coupling structure 70.

[0450] The third stage 73 of the socket-like coupling structure 70 accordingly has an eight-shaped opening 81, on each side of which a tapered rib 80 is formed, wherein the tapered ribs 80 correspond to or engage with the two grooves 49 between the upper sub-element 47 and the lower sub-element 48 of the first stage 41 of the plug-like coupling structure 40.

[0451] The above-described design of the bush-like coupling structure 70 also applies to all plug-on parts according to the invention.

[0452] The Fig. 4 und 5 show side views of further embodiments of a toothbrush attachment 60 according to the invention. The embodiments according to Fig. 4 has conventional bristle bundles 64' in the head area 63. The attachment part 60 has virtually no angle here. The angle Δ is virtually 0°.

[0453] In the embodiment according to Fig. 5 the bristle bundles 64" have different lengths. In particular, the bristle bundles 64'' arranged towards the free end of the head region 63 are somewhat longer than the other bristle bundles. The attachment part 60 also has an angle Δ between the longitudinal axis of the attachment part AA and the longitudinal axis of the head region AB. The dimensions for the angle can be found in the above description.

[0454] In the embodiment according to Fig. 6 The bristle bundles 64‴ arranged in the head region 63 each have a step at their free end. Such configurations serve, in particular, to improve the cleaning of the interdental spaces. In this embodiment, the attachment part 60 also has an angle Δ. The dimensions for the angle can be found in the above description.

[0455] The Fig. 7a bis 7d illustrate a further embodiment of an attachment part 60 according to the invention, here in the form of a facial brush.

[0456] As can be seen, the neck region 62 of the facial brush is significantly shortened (ie in particular compared to the attachments for a toothbrush), so that the head region 63 is practically above the interface X (ie in the attached state).

[0457] The facial brush has a bristle array 68, which can be formed from several tufts of bristles, or a continuous array or carpet of adjacent individual bristles. The bristles in this application form are usually very fine to avoid any possible skin irritation.

[0458] In the base area 61 of the facial brush, the recess 67 is formed, which is opposite to the cam 45 of the handle. The stop surface 66 has the corresponding bevel. Here, too, a bushing-like coupling structure 70 is provided in the interior of the attachment part, from which Fig. 7c the circumferential recesses 76 of the first stage 71 can be seen.

[0459] Further on in the Fig. 7a und 7d In particular, the flat spot 10a on the attachment can be seen. This corresponds to the flat spot(s) 10 on the handle 1.

[0460] As a further embodiment of an attachment part according to the invention, Fig. 8a bis d a nail tool is shown.

[0461] The attachment 60, in turn, has a base region 61, in which the recess 67 is formed for receiving the cam 45 of the handle. A first attachment 84, preferably designed as a nail file, is formed on the underside of the nail tool. This attachment extends essentially over the base region 61 and the neck region 62 of the nail tool.

[0462] At the free end of the nail tool, a treatment element 86 is arranged on the underside, which can have the configurations outlined above in the general description (e.g., grinding, polishing, varnishing agents). The treatment element 86 is arranged on the underside of the head region 63. A second attachment 85 is arranged on the top side of the head region 63, which can be configured, for example, as a replaceable sanding disc, etc.

[0463] Since the device must be guided with particular precision for this application as a nail tool, grip recesses 82 and 83 are provided on the top and side walls of the attachment. In particular, a grip recess 83 with knobs 83a is provided on the top. The side grip recesses 82 do not have a knob structure here and are shaped like depressions.

[0464] The grip recesses 82, 83 or the knobs 83a can be formed from hard and / or soft components.

[0465] In this way, the grip and guidance of the device can be significantly improved. The webs 57 and the soft component of the front section 3 can serve as additional support for a guiding finger or guiding parts of the hand.

[0466] Regarding the specific dimensions, materials and other features, please also refer to the above general description of the facial brush attachment.

[0467] As a further embodiment of an attachment part according to the invention, Fig. 9a bis c a plug-on part with a sponge-like structure is shown.

[0468] The plug-on part 60 in turn has a base region 61 in which the recess 67 for receiving the cam 45 of the handle is formed.

[0469] A treatment element 87 with a sponge-like structure is arranged on the underside of the free end of the attachment part 60. The treatment element 87 is arranged on the underside of the head region 63.

[0470] Regarding the specific dimensions, materials and other features, please also refer to the general description above.

[0471] As a further embodiment of an attachment part according to the invention, Fig. 10a und b A flosser attachment is shown. The attachment 60 has a base region 61, in which the recess 67 is formed for receiving the cam 45 of the handle. At the free end on the upper side, two holding arms 88 are formed, between which a piece of dental floss 89 is stretched.

[0472] The holding arms 88 are arranged directly on the top of the head area 63.

[0473] The described interchangeability of the functional element without changing the base body of the attachment is indicated by the two dashed lines in the head area. A recess can be arranged in the base body into which the functional element, i.e., the actual flosser, is interchangeably mounted.

[0474] Regarding the specific dimensions, materials and other features, please also refer to the general description above.

[0475] As a further embodiment of an attachment part according to the invention, Fig. 11a und b An interdental attachment is shown. The attachment 60 has a base region 61, in which the recess 67 is formed for receiving the cam 45 of the handle.

[0476] The functional element is designed to be interchangeable. The support element of the interdental brush 91 is firmly connected to the interdental brush 90. The arrangement of the support element of the interdental brush 91 in the head area 63 of the attachment 60 creates the functional attachment.

[0477] The functional element is replaceable as described above. The interchangeability of the functional element without changing the base body of the attachment is indicated by the two dashed lines in the head area. A recess can be arranged in the base body into which the functional element or the support element of the interdental brush 91, which is connected to the interdental brush 90, can be inserted. The exchange mechanism can be implemented in various known ways, for example, by a screw connection or a bayonet lock.

[0478] Regarding the specific dimensions, materials and other features, please also refer to the general description above.

[0479] As a further embodiment of an attachment part according to the invention, Fig. 12a bis c A massage roller attachment is shown. The attachment 60 has a base region 61, in which the recess 67 is formed for receiving the cam 45 of the handle.

[0480] The massage roller attachment 60 has an actual massage roller in the head region 63, i.e., a cylinder 92 mounted on the rotational axis of the massage roller 93. The rotational axis of the massage roller 93 is fixed in the head region of the attachment 60 and is arranged in a non-removable manner. The surface of the massage roller is provided with recesses 94 for massage. The recesses 94 are arranged on the cylinder as well as on the free base.

[0481] As a further embodiment of an attachment part according to the invention, Fig. 13a bis c A wet razor attachment is shown. The attachment 60 has a base portion 61, in which the recess 67 is formed for receiving the cam 45 of the handle.

[0482] The blade of the wet razor 95 is arranged on the head part 63 and can be replaceable or fixed, as already described above.

[0483] In the Fig. 14a bis 14c the embodiment of the attachment part 60 in the form of a facial brush according to Fig. 7a bis 7d shown mounted on a handle 1.

[0484] The significantly shortened neck region 62 means that the head region 63 is located practically above the interface X. The head region 63 has a base area 63' (bristle exit area).

[0485] It can also be seen that the bristle area 68 of the facial brush attachment 60 protrudes beyond the rear surface of the brush attachment. It can also be seen that the (imaginary) extension of the plug-like coupling structure 40 of the handle 1 intersects the bristle area or bristles.

[0486] It can be seen that the flat spot 10a is formed on the back of the attachment part, which corresponds to the flat spot on the back of the handle 1.

[0487] In the assembled state, it can be seen that the brush head is larger than the interface X and thus forms an element which provides good handling for the assembly and disassembly of the facial brush attachment part 60 on the handle 1.

[0488] The longitudinal axis AG of the handle 1 forms an angle α 2 with the base surface 63' and an angle α 3 with the longitudinal axis LB of the bristles. The rotation axis AM of the vibration motor 14 forms an angle β 2 with the base surface 63' and an angle β 3 with the longitudinal axis LB of the bristles.

[0489] Not all reference symbols are listed in the drawing, because the drawing of the handset 1 corresponds to Fig. 1f , whereby the reference numerals for this same handset 1 are identical.

[0490] Fig. 15a bis 15d show a further embodiment of an attachment part 60 according to the invention for use as a facial brush.

[0491] Shown is an attachment 60 with a recess 69 in the bristle area, which provides a certain degree of flexibility to the head area. Shown is a closed recess 69, which extends from the top of the attachment 1 to the bottom of the attachment 1.

[0492] The outer part of the bristle field 68 is arranged in a horseshoe shape around a central tongue. The connection 69' to the left and right of the central tongue is the only connection between the horseshoe-shaped part and the actual plug-in part. This provides flexibility, allowing the outer ring to move freely.

[0493] It should be noted that in Fig. 15a the interface is only stylized.

[0494] Bristle bundles 68' are mounted on the static part or sub-area 63a and on the flexible part or sub-area 63b. In the illustrated variant, the ratio of bristle holes to bristle bundles is 21:44. The area of ​​the static sub-area 63a in the illustrated variant is approximately 550 mm 2 to 650 mm 2 , and that of the flexible sub-area 63b is between approximately 1100 mm 2 and 1300 mm 2 .

[0495] In Fig. 16a bis 16e a further embodiment of a nail tool according to the invention is shown.

[0496] The plug-on part 60 in turn has a base region 61 in which the recess 67 for receiving the cam 45 of the handle is formed.

[0497] On the underside of the nail tool, a first attachment is formed with a working surface in the form of a grinding or polishing surface 84', which is preferably designed approximately as a nail file. This extends essentially over the neck region 62 and the head region 63 of the nail tool.

[0498] A treatment element (top side) 85' is arranged on the top side of the head region 63. This treatment element is designed as an edge or scraping edge for pushing back the cuticle. The edge is designed as a relatively sharp edge and at least partially exposed edge, allowing for treatment.

[0499] The edge defines (or the two surfaces leading to / converging to the edge define) an acute angle .

[0500] The edge for cuticle treatment is designed with a gradient, running from the stop edge of the clip-on piece around the front end to the stop edge. The usable edge is attached to the front end. The side elements are not usable.

[0501] Since the device must be guided particularly precisely for this application as a nail tool, structures 83a are attached to the top side to enable good positioning.

[0502] The structures 83a can be formed from hard and / or soft components and are shown here as rib-like structures by way of example.

[0503] In this way, the grip and guidance of the device can be significantly improved. The webs 57 and the soft component of the front section 3 can serve as additional support for a guiding finger or guiding parts of the hand.

[0504] Regarding the specific dimensions (angle , width B 2 and length L 9 ), materials and other configurations, reference is also made to the general description above.

[0505] To make the assembly and disassembly of the attachment on the handset easier, the carrier body is . the base body of the attachment part is tapered in the neck area 62. The attachment axis of the nail care attachment part 60 is essentially parallel to the longitudinal axis of the handle AG; ie . it may also have a slight inclination relative to the longitudinal axis of the handle AG or coincide with it.

[0506] In the Fig. 17a bis 17c A possible design of a serum applicator attachment is shown.

[0507] The plug-on part 60 in turn has a base region 61 in which the recess 67 for receiving the cam 45 of the handle is formed.

[0508] In the head area 63 a structure with two holding arms 101 is formed, which allows to carry an interchangeable part 96.

[0509] The interchangeable part 96 is inserted / clamped between the two holding arms 101. The holding arms 101 are designed to form a counter-geometry to the outer geometry of the interchangeable part 96, thus optimally holding the part. The holding arms 101 are also equipped with a certain degree of flexibility, allowing the interchangeable part 96 to be inserted and removed.

[0510] A ball 97 containing a liquid or viscous medium is inserted into the interchangeable part 96. Mounting the interchangeable part 96 onto the actual plug-on part 60 crushes the ball 97, and the medium escapes. For this purpose, recesses are provided in the interchangeable part 96 through which the medium can escape.

[0511] The interchangeable part 96 can be designed so that the medium carrier 97, e.g., the ball, is already mounted directly in the part, or the user can install it themselves. In the first case, interchangeable parts 96 are always required and sold, while in the second case, only the media 97 can be changed or replaced.

[0512] In addition to the recesses 99 for the fluid outlet, structures 100 are preferably applied to the interchangeable part 96, which improve or support the distribution of the fluid.

[0513] The actual plug-on part 60 has a mandrel 98, which interacts with the recess 102 of the interchangeable part 96. This mandrel 98 is inserted into the interchangeable part 96 during assembly of the interchangeable part 96. By bringing them together, the ball 96 of the medium in the recess 102 is crushed, and the medium flows out through the recesses 99.

[0514] The recess 102 of the interchangeable part 96 is designed larger than the mandrel 98, but the difference in size is only chosen so that the carrier 97 of the medium can still be crushed.

[0515] In the Fig. 18a bis 18d A nail care attachment 60 in the form of a nail brush is shown. A brush is formed in the front portion of the attachment.

[0516] The brush can be used to polish painted nails or untreated nails (polishing brush) as well as to clean the nails of dirt or grease, especially under the nail edges (cleaning brush).

[0517] The brush consists of a bristle array made of injected or conventionally stamped bristles. Additional elements can also be realized as overmolded bodies, for example, made of hard and / or soft components.

[0518] The neck and head area is designed differently depending on the size of the brush.

[0519] The plug-on part 60 in turn has a base region 61 in which the recess 67 for receiving the cam 45 of the handle is formed.

[0520] On the underside of the attachment part 60, a bristle field 68 is formed in the head area 63.

[0521] A grip recess 83 with nubs 83a is provided on the top side of the attachment part 60 for precise guidance. The grip recess 83 and the nubs 83a can be made of hard and / or soft components.

[0522] In Fig. 19a bis 19d a further embodiment of a nail tool according to the invention is shown.

[0523] The plug-on part 60 in turn has a base region 61 in which the recess 67 for receiving the cam 45 of the handle is formed.

[0524] On the underside of the nail tool, a first attachment is formed with a working surface in the form of a grinding or polishing surface 84', which is preferably designed approximately as a nail file. This extends essentially over the head region 63 of the nail tool.

[0525] A treatment element (top side) 85' is arranged on the top side of the head region 63. This treatment element is designed as an edge or scraping edge for pushing back the cuticle. The edge is designed as a relatively sharp edge and at least partially exposed edge, allowing for treatment.

[0526] The edge or the two surfaces leading to the edge form an acute angle a.

[0527] The edge 85' for cuticle treatment is designed with a gradient and runs around the front end of the attachment part 60. The usable edge is attached in the front area at the front end.

[0528] Since the device must be guided particularly precisely for this application as a nail tool, structures 83a are arranged on the top side in a grip recess 83, which enable good positioning.

[0529] The structures 83a can be formed from hard and / or soft components and are shown here as nub-like structures by way of example.

[0530] In this way, the grip and guidance of the device can be significantly improved. The webs 57 and the soft component of the front section 3 can serve as additional support for a guiding finger or guiding parts of the hand.

[0531] Regarding the specific dimensions, materials and other configurations, reference is also made to the general description above. In general, this embodiment of the nail care attachment 60 is somewhat shorter (length L 9') with respect to the head region 63, wider (width B 2') and, in particular, somewhat less curved in the area of ​​the edge 85' (i.e., larger radius of curvature) than, for example, Fig. 16 .

[0532] The radius of curvature R K1 in Fig. 16 at the front end is between 2 mm and 4 mm, preferably between 2.5 mm and 3.5 mm. While the radius of curvature R K2 in Fig. 19 at the front end between 3 mm and 5 mm, preferably between 3.5 mm and 4.5 mm.

[0533] In order to make the assembly and disassembly of the plug-in part on the handset easier, the carrier body, ie the base body of the plug-in part, is designed to be less wide in the neck area 62 than the first attachment 84. Bezugszeichenliste:

[0534] 1 Handle (= handle and cover) 1a Hard component 1b Soft component 1b' Further soft component 1c Handle (= handle body and inner workings) 1d Handle body (= base body and overmolded body) 2 Switch section (made of soft component 1b') 3 Front section (made of soft component 1b') 3a Back section (made of soft component 1b') 4 On / off switch symbol 5 Base body (made of hard component) 6 First marking (triangular, on handle, opposite 37 when closed) 7 Second marking (line-like, on handle opposite 37 when not closed) 8 Ventilation hole 9 Ventilation membrane 10 Flat spot 10a Flat spot on the attachment part 11 Waist 12 Support element 12a Bevel of the support element 14 Electric motor / vibration motor 15 Eccentric 17 Support element contact plate 18 Motor compartment 18a Cable entry 19 Switch compartment 20 Contact plate compartment (battery version) for the battery contact plate 21 Battery compartment21a Battery compartment 22 Socket compartment 23 Connection compartment 24 Switch 25 Printed circuit board 26 Snap-in lugs 27 Front motor stop 28 Rear motor stop 29 Seal (on the carrier element of the battery version) 30 Socket 30a Socket connections (to the printed circuit board) 31 Contact element of the socket 31b Front stop of the socket 32 ​​Battery contact plate 33 Contact tongue of the battery contact plate 32 34 Sealing ring of the cover 35 Cover 35a Cover cavity (of the cover 35) 35b Contact plate of the cover 35 35c Spring plate element (of the cover 35) 36 Notches 37 Marking (triangular, opposite 6 when closed) 38 Marking (triangular, on the back / underside) 39 Battery 39a Battery terminal (cover side) 40 Plug-type coupling structure of the handle 41 First stage (of the coupling structure of the handle - at the free end) 42 Second stage (of the coupling structure of the handle - in the middle) 43 Third stage(of the coupling structure of the handle - resting against the stop surface) 44 Stop surface of the handle 45 Cam 45a Stem 45b Crown 46 Base area of ​​the plug-type coupling structure 47 Upper sub-element (of the first step 41 of the handle) 48 Lower sub-element (of the first step 41 of the handle) 49 Groove between the upper and lower sub-elements 47, 48 of the first step 41 of the handle 50 Angular groove (on the upper side of the plug-type coupling structure 40) 51 Round groove (on the underside of the plug-type coupling structure 40) 52 Transition area from the first to the second step 42 of the plug-type coupling structure 40 53 Circumferential recesses (of the second step 42 of the plug-type coupling structure 40) 54 Circumferential projections (of the second step 42 of the plug-type coupling structure 40) 55 Circumferential recesses (of the third stage 43 of the plug-type coupling structure 40) 56 Circumferential projections (of the third stage 43 of the plug-typeCoupling structure 40) 57 Webs 58 Battery 60 Attachment 61 Base area of ​​the attachment 62 Neck area of ​​the attachment 63 Head area of ​​the attachment 63' Base area (exit area of ​​bristles) 63a Static section 63b Flexible section 64 Cleaning elements of the attachment (bristles or bristle bundles and / or soft-elastic cleaning and massage elements) 64 'Bristle bundle of the attachment 64" Bristle bundle of the attachment 64‴ Bristle bundle of the attachment 65 Support plate (AFT) of the attachment 66 Stop surface of the attachment 67 Recess on the attachment 68 Bristle field 68' Bristle bundle 69 Recess 69' Connection 70 Socket-like coupling structure of the attachment 71 First stage of the coupling structure of the attachment (at the free end - corresponding to the third stage of the coupling structure of the handle) 72 Second stage of the coupling structure of the attachment (in the middle - corresponding to the second stage of the coupling structure of the handle) 73 Third stage of the coupling structure of the attachment (to the innermost - corresponding to the first stage of the coupling structure of the handle) 74 Square comb (on the top / front of the attachment) 75 Round comb (on Bottom / back of the plug-on part) 76 Circumferential recesses (of the first stage 71 of the socket-likeCoupling structure 70) 77 Circumferential projections (of the first stage 71 of the socket-like coupling structure 70) 78 Circumferential recesses (of the second stage 72 of the socket-like coupling structure 70) 79 Circumferential projections (of the second stage 72 of the socket-like coupling structure 70) 80 Ribs (of the third stage 73 of the socket-like coupling structure 70) 81 Figure-eight opening (of the third stage 73 of the socket-like coupling structure 70) 82 Side grip recesses 83 Grip recess (top side) 83a Knobs of the grip recess 84 First attachment (bottom side) 84 Working surface / grinding or polishing surface 85 Second attachment (top side) 85' Treatment element / scraping edge (top side) 86 Treatment element (bottom side) 87 Treatment element (in a sponge-like structure) 88 Holding arms 89 Dental floss 90 Interdental brush 91 Supporting element of the interdental brush 92 Massage roller (cylinder) 93 Rotation axis of the massage roller 94 Recesses of the massage roller 95 Blade of the wet razor96 Change part 97 Medium carrier 98 Mandrel 99 Recesses for the fluid outlet 100 Structures 101 Holding arm 102 Recess AG Longitudinal axis of the handle AK Longitudinal axis of the plug-in coupling structure AM Rotation axis of the electric motor AA Longitudinal axis of the plug-in part (longitudinal axis of the socket-like coupling structure) AB Longitudinal axis of the head area of ​​the plug-in part B 1 Width of the handle (max.) B 2 Width of the working surface B 2' Width of the working surface DV Diameter of the closure cover (max.) H 1 Height of the handle (max.) L 1 Length of the first step L 2 Length of the second step L 3 Length of the third step (on the top side) L 3' Length of the third step (on the bottom side) L 4 Total length of the handle (handle with closure cover) L 5 Total length of the handle (handle without closure cover) L 6 Length of the stop edge - end of the handle without closure cover (front or top side) L 7 Length of the stop edge - end of the handle without closure cover (back or bottom) L 8 lengthCover L 9 Length of working surface L 9' Length of working surface LB Longitudinal axis of bristles R Direction of insertion of support element R K1 Radius of curvature R K2 Radius of curvature X Interface α Angle stop surface / AG α 2 Angle AG / base surface α 3 Angle LB / AG β Angle AM ​​ / AG β 2 Angle AM ​​ / base surface β 3 Angle LB / AM φ Angle stop surface / AM Δ Angle plug-on part Angle edge or scraping edge

Claims

1. Plug-on part (60) for cleaning teeth, which can be attached to a handle (1), wherein the plug-on part (60) has a base region (61) and a head region (63) which are connected by a neck region (62), wherein the plug-on part (60) comprises a socket-shaped coupling structure (70) which has at least two stages (71, 72, 73) with different circumferential geometries and which form the part on the plug-on part for an interface (X) with a substantially mirror-inverted, plug-like coupling structure (40) of the handle (1), wherein the plug-on part (60) has a stop surface (66) which runs obliquely to a straight insertion direction (R), characterised in that a first stage (71) of the socket-shaped coupling structure (70) comprises circumferential recesses (76) and projections (77).

2. Plug-on part (60) according to claim 1, characterised in that the circumferential recesses (76) and / or projections (77) are symmetrical to each other.

3. Plug-on part (60) according to one of the preceding claims, characterised in that a second stage (72) of the socket-shaped coupling structure (70) comprises circumferential recesses (78) and projections (79).

4. Plug-on part (60) according to one of the preceding claims, characterised in that the plug-on part (60) has an angular comb (74) on the upper side.

5. Plug-on part (60) according to claims 3 and 4, characterised in that the angular comb (74) is arranged on the upper side of the second stage (72).

6. Plug-on part (60) according to one of the preceding claims, characterised in that the attachment part (60) has a round comb (75) on the underside.

7. Plug-on part (60) according to one of the preceding claims, characterised in that a longitudinal axis (AA) of the plug-on part (60) designates the longitudinal axis of the socket-shaped coupling structure (70) which lies in the base region (61) of the plug-on part (60), wherein a longitudinal axis (AB) of the head region (63) lies correspondingly in the head region (63) of the plug-on part (60) and at an angle Δ to the longitudinal axis (AA) of the plug-on part (60).

8. Plug-on part (60) according to claim 7, characterised in that the angle Δ between the longitudinal axis (AA) of the socket-shaped coupling structure (70) and the longitudinal axis (AB) of the head region (63) is between 10° and 30°, preferably between 15° and 25°.

9. Plug-on part (60) according to claim 7 or 8, characterised in that the stop surface (66) runs at an angle to the longitudinal axis (AA) of the plug-on part and that the plug-on part (60) has a cam-opposite recess (67) which is designed to interact with a cam (45) of the plug-like coupling structure (40) of the handle (1) in the manner of a snap connection.

10. Plug-on part (60) according to one of the preceding claims, characterised in that the length of the plug-on part (60) is between 50 mm and 100 mm, preferably between 60 mm and 90 mm, particularly preferably between 70 mm and 80 mm.

11. Plug-on part (60) according to one of the preceding claims, characterised in that the stop surface (66) and the insertion direction (R) form an angle α between 30° and 70°, preferably between 45° and 55°.

12. Plug-on part (60) according to claim 9, characterised in that circumferential recesses adjoin the cam-opposite recess on the inner side.

13. Plug-on part (60) according to one of the preceding claims, characterised in that the plug-on part (60) has a base body with a hard component, wherein the modulus of elasticity of the hard component of the base body of the plug-on part (60) is between 700 MPa and 1500 MPa, preferably between 900 MPa and 1250 MPa.

14. Plug-on part (60) according to one of the preceding claims 1 to 13, characterised in that the plug-on part (60) has a base body with a hard component made of polypropylene, wherein the modulus of elasticity of the hard component of the base body of the plug-on part (60) is between 1000 N / mm2 and 2400 N / mm2 , preferably between 1300 N / mm2 and 1800 N / mm2.

15. Plug-on part (60) according to one of the preceding claims, characterised in that at least one of the stages comprises a anti-rotation device.

16. Plug-on part (60) according to claim 15, characterised in that elements of the anti-rotation device are at least partially combined with elements of an insertion aid and / or a longitudinal guide.

17. Plug-on part (60) according to one of the preceding claims, characterised in that the cross-sections of the stages (71, 72, 73) are not arranged concentrically.

18. Plug-on part (60) according to one of the preceding claims, characterised in that the socket-shaped coupling structure (70) has a guide structure such that the plug-on part (60) can only be attached to the plug-like coupling structure (40) in one position.

19. Plug-on part (60) according to one of the preceding claims, characterised in that the socket-shaped coupling structure (70) is formed on the inside of the plug-on part and has three stages (71, 72, 73).