WO2011004043A2

WO2011004043A2 - Device for the application of meltable products

Info

Publication number: WO2011004043A2
Application number: PCT/ES2010/070451
Authority: WO
Inventors: Luis Martinez De San Vicente Oliveras
Original assignee: Ceras Especiales Martinez De San Vicente, S.A.
Priority date: 2009-07-07
Filing date: 2010-07-01
Publication date: 2011-01-13
Also published as: US20120177429A1; ES1070991U; EP2452586A2; ES1070991Y; WO2011004043A3

Abstract

The invention relates to a device (1) for the application of meltable products, especially depilatory wax, said device comprising a casing (2) that can be held with one hand and is open at the top, defining a cavity (3) that forms a container for receiving the plug of a storage element (4) containing wax and comprising dispensing means (5). Said casing has a male connector (6) for connecting to the female couplings of an electrical plug, the terminals (7) of the male connector being permanently connected, by means of low-resistivity electrical connection means (9c), to heating means (9) essentially powered by the voltage of the electrical grid and arranged in the container facing at least one of the sides of the storage element containing the wax.

Description

D E S C R I P C I Ó N

Applicable device for meltable products Technical sector of the invention

The invention relates to an applicator device of a meltable product such as wax for depilating, of which they comprise a hand-held housing and open upper delimiting a recess that, as a receptacle, receives the plug of a tank that stores wax and that it is provided with dispensing means.

Background of the invention

The technique of depilation by application of a hot melt product, such as wax for hair removal, consists in melting a certain amount of this product, which at room temperature is in solid or pasty state, and in applying a layer of the product on the area to be shaved. After hardening, that is, after cooling, the cold wax film is removed with the help of any appropriate means, then the hairs of the skin are removed due to their solidarity with the wax.

At present, wax hair applicators are known provided with an interchangeable tank of wax and heating means to increase the temperature of the stored wax, which is heated until reaching the appropriate temperature to keep it sufficiently liquid to be extended.

However, to heat the wax it is necessary to feed the heating means, so that some of the known compact applicators, such as the one described in ES2138309T3, need an extra component, formed by a base connected to the electrical network and provided with means converters to provide adequate voltage to the heating means. The base has some electrical terminals adapted to connect to other complementary electrical terminals provided in the applicator when it is coupled to the base. In this way it is possible to feed the heating means of the applicator until the wax acquires the appropriate temperature level for its use; then the applicator must be separated from the base to proceed with its use. However, this type of applicators equipped with a base has drawbacks in having electrical terminals exposed both in the base and in the applicator that can easily get dirty when molten wax is spilled and stop making good contact, requiring periodic cleaning to be effective.

Another drawback presented by the known devices is that since the electrical terminals are exposed, in order to easily connect the applicator to the base, they cannot satisfy the requirement of double electrical insulation required to be classified as Class II electrical appliances. Therefore, having electrical parts without double insulation, these must have a regulated and limited voltage below 5OV to be marketed as Class III electrical appliances. By requiring a voltage below that provided by the power grid, the known devices must incorporate converting means, which substantially increases the final cost of the device, in addition to occupying a larger space, so that a compact device cannot be achieved.

It is therefore an objective of the present invention to disclose a more compact and economical applicator. Explanation of the invention

The device for applying meltable products of the invention, in particular wax for depilating, comprises a housing that can be grasped with one hand and open at the top, delimiting a recess that, as a receptacle, receives the plug of a tank that stores wax and is provided with dispensing means.

In essence, the device is characterized in that the housing is provided with a plug for direct connection to the sockets of an electrical plug, the terminals of the plug being permanently connected by means of low resistivity electrical connection means, such as electric cables, to heating means, fed essentially to the tension of the electric network and arranged in the receptacle facing at least one of the faces of the tank that stores wax.

In a variant of interest, the heating means comprise a PTC thermistor, that is to say a variable resistance according to its temperature, and a plate of dissipation in contact with the PTC thermistor, which allows the heat generated by it to be distributed homogeneously.

In another variant, the switching temperature of the PTC thermistor, that is, the equilibrium temperature of the PTC thermistor at which its resistivity prevents the passage of sufficient electric current to allow the temperature to rise, is greater than 3O ⁰ C and lower at 5O ⁰ C and more specifically, in a variant, said temperature is 4O ⁰ C, suitable temperature so that the wax is sufficiently liquid so that it can be extended comfortably, without causing burns, on the user's skin.

According to another characteristic, the deposit is parallelepipedic and the surface of the dissipation plate in contact with the deposit is essentially equal to the surface of one of the faces of said deposit. Naturally, the dissipation plate can be provided with conductive extensions that wrap the PTC thermistor in order to effectively drive as much heat as possible to the tank.

In an embodiment of interest, the surface of the dissipation plate is 1200mm ² , the volume of the tank is 25 ml and the maximum power dissipated by the PTC thermistor is 4 W, said ratios being adequate to allow sufficient heating deposit wax.

In another embodiment of the device, the surface of the dissipation plate is 2400mm ² , the volume of the tank is 50 ml and the maximum power dissipated by the PTC thermistor is 4 W, these ratios being also suitable to allow the heating to be sufficiently heated. deposit wax.

In another variant, the mouth of the tank that stores wax is cylindrical, the diameter of the said mouth being 12 to 15 mm, which allows the hot wax and in liquid or semi-liquid state to flow to the dispensing means and be applied by means of the roller on the user's skin.

In a variant of interest, the device also comprises first and second thermal insulation means, applied in the inner and outer part of the housing, respectively, and arranged facing the heating means to prevent the heat produced by the heating means from heating too much the housing and the user's hand during use.

Brief description of the drawings - TO -

The attached drawings illustrate, by way of non-limiting example, a preferred embodiment of the applicator device object of the invention. In these drawings,

Fig. 1 is an exploded view of a variant of the device object of the invention;

Fig. 2a, is a rear perspective view of the variant of Fig. 1, mounted and with the wax tank placed in its operative position;

Fig. 2b, is a front perspective view of the variant of Fig. 1, mounted and to which the wax tank has been removed; Y

Fig. 3, is a longitudinal sectional view of the wax applicator device of Fig. 2a.

Detailed description of the drawings

The device shown in Fig. 1 is especially intended for the application of wax for hair removal. Said device comprises a housing 2, formed by two halves 2a, 2b, attachable according to a longitudinal plane of the device, which houses in its interior heating means 9, comprising a PTC thermistor 9a and a metallic dissipation plate 9b that helps to distribute evenly the heat produced by the heating means 9.

Said dissipation plate 9b is distanced from the second half 2b of the housing 2, by means of first thermal insulating means 10, to prevent a too high level of heat from being transmitted to the second half 2b of the housing 2 and, by consequently, that burns can occur in this or in the user's hand when gripping the device 1.

To improve the level of thermal insulation, the device 1 also incorporates a second means of thermal insulation 1 1 in the outer part of the second half 2b of the housing 2, which in addition to offering a better grip for the user's hand, prevents The heat that can be transmitted through the second half 2b of the housing 2 burns the user's hand or hinders the use of the device when the housing 2 is hot.

The second half 2b of the housing 2 advantageously has fastening means 10a for fixing the first insulating means 10 on which the dissipation plate 9b is arranged, snapped. Said dissipation plate 9b, together with fins (not shown) arranged to guide mode in the first half 2a of the housing 2 make up the recess 3 intended to receive the plug of the wax tank 4.

To facilitate the connection between the first and second half 2a, 2b of the housing 2, the first half 2a is provided with a series of housings (not shown), conveniently distributed that act in functional correspondence with respective projections 13 located in the second half 2b, being, in the coupling position, the projections 13 fitted in the pressure housings. To secure the engagement, the second half 2b also has bent tabs 14b adapted to be accommodated in projections 14a provided in the first half 2a of the housing 2, the device 1 being firmly coupled, as shown in Figs. 2a and 2b.

The second half 2b of the housing 2 also has ventilation slots 12 to allow the exchange of air between the inside and outside of the device 1 in order to avoid overheating of the device 1.

As can be seen in Fig. 3, when joining the first and second halves 2a, 2b of the housing 2, a recess 3 is formed inside the device 1, with an opening 3a in its upper part, delimited by The dissipation plate 9b and the housing 2, which allow a wax tank 4 to be fitted with fit. Said wax tank 4 is provided in its upper part with an opening 4a connected to dispensing means 5 comprising a roller 5a to allow the exit of the wax from inside the tank 4 and the extension of the wax on the skin of the user when it is hot enough.

The PTC thermistor 9a has an electrical connection means 9c which in the variant shown are formed by electrical cables covered with protective plastic material and connected to the terminals 7 arranged in the pin 6. Said pin 6 is located at the rear of the second half 2b of the housing 2 and is permanently embedded in the sockets of an electrical plug of the usually known, in order to supply the PTC thermistor 9a to the network voltage. Naturally, the PTC thermistor 9a must be properly designed to correctly withstand the mains voltages of each region, thus determining a maximum operating voltage, which in the represented variant is 230V. Also, the morphology of the plug must be adapted according to the electrical plugs available in each region, the variant being suitable for European type C plugs. In any case, the pin 6 is integrated in the housing 2 and allows the direct connection of the device 1 to the electrical network.

As is known in the state of the art, the PTC thermistor 9a increases its resistivity proportionally to its temperature, producing heat by joule effect until reaching an equilibrium temperature, from which its resistivity is sufficiently high to not allow the passage of electric current and therefore produce heat, the PTC thermistor 9a stabilizing at said equilibrium temperature. For the correct operation of the device, it is necessary that the equilibrium temperature of the PTC thermistor 9a is above the ambient temperature and that it is suitable for melting the wax of the reservoir 4, so that the wax can be easily extended by means 5 dispensers on the user's skin, without causing burns.

For the use of the device 1, a tank 4 of wax must be introduced into the cavity 3, to which the dispensing means 5 have previously been coupled in its mouth 4, and the device 1 must be connected to the electrical network so that the means heaters 9 heat the wax to the desired level. When the wax is hot enough and after unplugging it from the power grid and gripping it with one hand, the application of the molten wax can be carried out.

The device 1 is also reusable, since when the wax of the tank 4 is finished, since it is removable, the user can remove the empty tank 4 and replace it with a full one, being able to reuse the device 1 for successive wax applications.

Advantageously, since all the electrical connections are isolated from the user during the wax heating process, the device 1 meets the safety requirements to be fed directly to the voltage of the electrical network, without having to require a transformer to reduce said voltage, thus achieving a compact and economical wax applicator device 1.

Claims

1. Device (1) applicator of meltable products, in particular wax for depilating, comprising a housing (2) that is asible with one hand and open, delimiting a hole (3) which, as a receptacle, receives the plug of a tank (4) that stores wax provided with dispensing means (5), characterized in that the housing is provided with a plug (6) for connection to the sockets of an electric plug with the terminals (7) of the plug permanently connected by means of electrical connection means (9c) of low resistivity to heating means (9), essentially fed to the voltage of the electrical network and arranged in the receptacle facing at least one of the faces of the tank that stores wax.

2. Device (1) according to the preceding claim, characterized in that the heating means (9) comprise a PTC thermistor (9a) and a dissipation plate (9b).

3. Device (1) according to the preceding claim, characterized in that the switching temperature of the PTC thermistor (9a) is greater than 3O ⁰ C and less than 5O ⁰ C.

4. Device (1) applicator according to the preceding claim, characterized in that the switching temperature of the PTC thermistor (9a) is 4O ⁰ C.

5. Device (1) applicator according to claim 2, characterized in that the reservoir (4) is parallelepipedic and the surface of the dissipation plate (9b) is essentially equal to the surface of one of the faces of said reservoir.

6. Device (1) according to the preceding claim, characterized in that the surface of the dissipation plate (9b) is 1200mm ² , the volume of the tank (4) is 25 ml and the maximum power dissipated by the PTC thermistor ( 9a) is 4W.

7. Device (1) according to claim 5, characterized in that the surface of the dissipation plate (9b) is 2400mm ² , the volume of the tank (4) is 50 ml and the maximum power dissipated by the PTC thermistor ( 9a) is 4W.

8. Device (1) according to any one of the preceding claims, characterized in that the mouth (4a) of the tank (4) that stores wax is cylindrical, the diameter of said mouthpiece being 12 to 15 mm.

9. Device (1) according to any one of the preceding claims, characterized in that it also comprises first and second thermal insulation means (10, 1 1) applied in the inner and outer part of the housing (2), respectively, arranged facing the heating means (9).