WO2024130532A1

WO2024130532A1 - Device for dispensing a liquid product

Info

Publication number: WO2024130532A1
Application number: PCT/CN2022/140252
Authority: WO
Inventors: Jinseok Kim; Yi Shi; Junwen Wang
Original assignee: L'oreal
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2024-06-27
Also published as: FR3143565A1; FR3143565B1; CN120225436A

Abstract

A device for dispensing a liquid product, comprising: a container (2) including an opening to dispense the liquid product; an outer screw cap (3), which is configured to be mounted onto the container (2); an inner cap (4), which is engageable with the outer screw cap (3) and movable thereon from an open position in which the liquid product is dispensed from the container (2), to a closed position in which the liquid product is blocked from flowing out; and an applicator (5) coupled to the inner cap (4) and configured to dispense the liquid product therefrom; wherein a channel (321) is formed on a portion of the outer screw cap (3) for engaging with the inner cap (4), and a slider (413) is formed on the inner cap (4), and the slider (413) slides along the channel (321) during the rotation of the inner cap (4) with respect to the outer screw cap (3) between the open position and the closed position, and during the rotation towards the open position, the inner cap (4) will axially move away from the outer screw cap (3).

Description

DEVICE FOR DISPENSING A LIQUID PRODUCT

FIELD OF THE INVENTION

The invention relates generally to a device for dispensing a liquid product.

BACKGROUND

Application of various scalp treatment and liquid products (such as lotion) , and particularly those utilized in a professional form, are well known in the prior art. Hairdressers and the like, as a matter of course, apply liquid product (such as lotion) to a scalp by means of a device for dispensing a liquid product.

An applicator for a fluid product, such as a cosmetic product, is known from document EP1978841A2. This document discloses an applicator for a fluid product such as a cosmetic product, of the type including: a container having an outlet, a control ring which is mounted to the container such that it can move between a closed position in which it seals the outlet and an open position in which it opens the outlet, and an application member which is mounted to the control ring so as to communicate with the outlet when the ring is in the open position, abutment means being provided in order to stop the travel of the ring towards the closed position thereof, the control ring is rotatably mounted to the container free of any translation.

EP1978841A2 provide an applicator which allows, during the entire service life thereof, a predetermined alignment of the control ring to be maintained with respect to the container in the closed position, whilst providing complete tightness.

It may be appreciated that there continues to be a need for a new and improved device for dispensing a liquid product as set forth herein which provides a right formulation delivery together with well established massage function, and in this respect, the present invention substantially fulfills this need.

SUMMARY

One aim of the invention is therefore to provide a device for dispensing a liquid product that provides a right formulation delivery together with well established massage function.

According to one advantageous embodiment, the invention relates to a device for dispensing a liquid product, comprising:

- a container including an opening to dispense the liquid product;

- an outer screw cap, which is configured to be mounted onto the container;

- an inner cap, which is engageable with the outer screw cap and movable thereon from an open position in which the liquid product is dispensed from the container, to a closed position in which the liquid product is blocked from flowing out; and

- an applicator coupled to the inner cap and configured to dispense the liquid product therefrom;

wherein a channel is formed on a portion of the outer screw cap for engaging with the inner cap, and a slider is formed on the inner cap, and the slider slides along the channel during the rotation of the inner cap with respect to the outer screw cap between the open position and the closed position, and during the rotation towards the open position, the inner cap will axially move away from the outer screw cap.

In another aspect of the present application, the outer screw cap includes a cap body having a skirt part for fastening onto the opening of the container and a ceiling formed at the top portion of the skirt part, and the outer screw cap includes a collar axial extending from the ceiling, and the channel is formed on the outer peripheral surface of the collar and is inclined in the axial direction. The inner cap includes an outer peripheral skirt and a base part formed at the top end of the outer peripheral skirt, and the slider extends radially inwards from the inner peripheral surface of the outer peripheral skirt, and during rotation of the inner cap with respect to the outer screw cap, the slider will slide within the channel.

In another aspect of the present application, a stop is axially extending from the ceiling of the outer screw cap, and an inner peripheral skirt is extending axially from the base part and coaxial with the outer peripheral skirt on the inner cap, and a corresponding stop is extending axially from the base part and radially from the outer periphery of the inner peripheral skirt, and when the inner cap is rotated to the closed position, the corresponding stop will abut the stop with a click sound or audible sound.

In another aspect of the present application, the collar includes at least one axial slot at either end of the channel, and when the inner cap is rotated to the open position or the closed position, the slider will slide into respective one of the axial slots.

In another aspect of the present application, the collar includes two or four axial slots which are spaced at the circumference thereof, and two channels are diagonally formed on the outer peripheral surface of the collar, and two or four sliders are diagonally formed on the inner cap, so that the inner cap rotates 90 degrees to 180 degrees from the closed position to the open position.

In another aspect of the present application, the inner cap and the outer screw cap comprise a recess and complementary recess respectively, and the recess is coaxial with the outer peripheral skirt of the inner cap, and the complementary recess is coaxial with the collar on the outer screw cap. A post is axially extending from the ceiling and is located in the center of the complementary recess; wherein when the inner cap is in the closed position, the post abuts an inner peripheral surface of the recess so as to block the liquid product from flowing out; when the inner cap is in the open position, the liquid product will pass between the post and the recess.

In another aspect of the present application, the post is formed with an upstanding dome at the free end, and when the inner cap is in the closed position, the upstanding dome abuts the inner peripheral surface of the recess.

In another aspect of the present application, holes are formed in the ceiling and located between the outer peripheral surface of the post and the inner peripheral surface of the complementary recess, and apertures are formed in base part and within the recess, and these holes and apertures form part of a passageway for liquid product.

In another aspect of the present application, the upstanding dome cooperatively engages with the recess to block the apertures when the inner cap is in the closed position.

In another aspect of the present application, the collar has a circumferential edge on the outer peripheral surface of the collar, and the outer peripheral skirt has a corresponding circumferential edge on the inner peripheral surface thereof for engaging with the circumferential edge, so as to avoid the inner cap axially moving away from the outer screw cap.

In another aspect of the present application, the collar has one or more strengthen ribs axially extending on the inner peripheral surface of the collar at the position corresponding to the channel.

In another aspect of the present application, the outer screw cap includes a curved axial groove formed on the ceiling, and the curved axial groove is coaxial with the collar and the depth of the groove changes in the axial direction. The inner cap includes an overhang extending axially from the inner peripheral skirt, and during rotation of the inner cap with respect to the outer screw cap, the overhang will slide within the curved axial groove.

In another aspect of the present application, the applicator includes a massage head, and the massage head is made of materials selected from the group of TPE, elastomer plastics, PU (Polyurethan) and silicone rubber, and has a shore hardness of A scale, which is preferably between 20 and 90.

In another aspect of the present application, the applicator includes multiple nozzles, and the massage head is to be mounted onto the applicator.

In another aspect of the present application, the massage head includes multiple massage protrusions corresponding to the multiple nozzles, and the massage protrusion is has a ball or oval shape.

Further areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.

BRIEF DESCRIPTION OF THE FIGURES

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.

FIG. 1 is a perspective view of a device for dispensing a liquid product according to one exemplary embodiment of the present application;

FIG. 2 is an exploded view of a device for dispensing a liquid product according to one exemplary embodiment of the present application, wherein the container of the device is omitted, and Fig. 2 shows an outer screw cap, an inner cap, an applicator and optionally a massage head to be fitted onto the applicator;

FIG. 3 is a perspective view of the inner cap and the applicator of the device for dispensing a liquid product according to one exemplary embodiment of the present application;

FIG. 4 is a perspective view of the outer screw cap of the device for dispensing a liquid product according to one exemplary embodiment of the present application;

FIG. 4A is another perspective view of the outer screw cap of the device for dispensing a liquid product from another angle of view, wherein the channel on the collar of the outer screw cap is shown in more detail;

FIG. 5 is a perspective view of the inner cap of the device for dispensing a liquid product according to one exemplary embodiment of the present application, wherein the inner cap is shown in a view seen from bottom;

FIG. 6 is a sectional view of the inner cap and the outer screw cap of the device for dispensing a liquid product according to one exemplary embodiment of the present application, wherein the inner cap is situated in a closed position with respect to the outer screw cap; and

FIG. 7 is a sectional view of the inner cap and the outer screw cap of the device for dispensing a liquid product according to one exemplary embodiment of the present application, wherein the inner cap is situated in an open position with respect to the outer screw cap.

DETAILED DESCRIPTION

The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.

With reference now to the drawings, a new and improved device for dispensing a liquid product embodying the principles and concepts of the present invention and generally designated by the reference number 1 will be described.

With reference to Fig. 1, there is shown a device 1 for dispensing a liquid product according to one exemplary embodiment of the present application. The device 1 is to be grasped by a user, in order to allow the user to carry out a massage of the scalp as well as application of liquid product to be treated on the scalp using at least one massage element. The massage element is for example a ball or a sphere that is applied on the body surface of the user. In one example, the massage element is a nozzle 51 of the applicator 5. In another example as shown in Figs. 1-2, the massage element is a massage head 6 which is nested on the applicator 5. In one example, the massage head 6 includes multiple massage protrusions 61 corresponding to the number of the multiple nozzles 51, and the massage protrusion 61 is made of elastomer material and has a ball or oval shape. In one example, the massage protrusion 61 and/or the massage head is made of TPE material, and preferably, the TPE material has a Shore hardness with A scale. In another example, the massage protrusions 61 may be made of materials selected from the group of TPE, elastomer plastics, PU (Polyurethan) and silicone rubber. In one example, the Shore hardness of massage protrusion 61 is between 20 and 90. In one example, the applicator and/or the nozzle are/is made of PP and TPE by bi-injection molding process. In such a situation, the device 1 for dispensing a liquid product will provide a comfortable soft massage feeling to the customers.

In one exemplary embodiment of the present application, the container 2 can be squeezed to promote the liquid product flowing out when in the open position. Moreover, the multiple nozzles 51 are advantageous over only one nozzle in that the fluid product is more evenly dispensed in a reduced volume for each nozzle.

In the present application, the device for dispensing a liquid product includes a scalp massage applicator, and this applicator has 3～5 nozzles. Thanks to soft material (TPE/Elastomer/PU material) with bi-injection technology for the scalp massage applicator, the device for dispensing a liquid product would provide right formulation delivery together with massage function. Moreover, this applicator will be easy to move on the scalp because it has 4 nozzles for formula delivery and soft elastomer for massage function on the scalp. Thanks to soft touch of massage applicator, the applicator would help to improve scalp blood circulation.

The device 1 for dispensing a liquid product includes an outer screw cap 3, which is configured to be mounted onto the container 2. In particular, in one example, as shown in Figs. 4, 4A and 6-7, the outer screw cap 3 includes a cap body 31 having a skirt part 312 for fastening onto the opening of the container and a ceiling 311 formed at the top portion of the skirt part 312. Moreover, the outer screw cap 3 includes a collar 32 axially extending from the ceiling 311 in a direction opposite from the skirt part 312, and the collar 32 forms a portion of the outer screw cap 3 for engaging with the inner cap 4. As shown in Figs. 6-7, the skirt part 312 has female thread on the inner peripheral surface thereof, and the skirt part 312 is fastened onto the opening of the container by means of the female thread.

With reference to Fig. 5 and with continuous reference to Figs. 2 and 6-7, The device 1 for dispensing a liquid product also includes an inner cap 4, which is engageable with said outer screw cap 3 and movable thereon from an open position in which the liquid product is dispensed from the container 2, to a closed position in which the liquid product is blocked from flowing out. In one exemplary embodiment of the present application, as shown in Figs. 4-5 and as especially shown in fig. 4A, a channel 321 is formed on the outer peripheral surface of the collar 32 of the outer screw cap 3 and preferably on the midway of the outer peripheral surface of the collar 32, and a slider 413 is formed on the inner cap 4 and the slider 413 slides along the channel 321 during the rotation of the inner cap 4 with respect to the outer screw cap 3 between the open position and the closed position, and during the rotation towards the open position, the inner cap 4 will axially move away from said outer screw cap 3. In one example, the inner cap 4 and/or the outer screw cap 3 is made of PP material by injection molding process.

In one exemplary embodiment as shown in Fig. 5, the inner cap 4 includes an outer peripheral skirt 41 and a base part 40 which is formed like a ceiling or top plate at the top end of the outer peripheral skirt 41. The slider 413 extends radially inwards from the inner peripheral surface of the outer peripheral skirt 41, and during rotation of said inner cap 4 with respect to said outer screw cap 3, the slider 413 will slide within said channel 321 of the outer screw cap 3.

In this way, the present application uses a simple inner/outer sliding system to realize the opening and closing of the device 1 for dispensing a liquid product. The inner/outer sliding system can also be called on/off system, and it would have a simple rotation gesture and it would achieve multiple functionalities (for example, close /opening /formula delivery) . Furthermore, this on/off system also includes a formula delivery function and it would provide formula delivery until it is closed to scalp for blood circulation. Thank to soft massage applicator, the reason why consumer presses applicator during the massage and formula delivery is to give to a pressing force. It would be more help to provide scalp blood circulation during the formula is applied to the scalp. Moreover, soft massage protrusion 61 of ball or oval shape which is made by elastomer material will provide the customers with comfortable feeling, and thus the customers will enjoy the liquid scalp/hair composition functional benefit for health of scalp.

Moreover, the device 1 for dispensing a liquid product includes an applicator 5. In one exemplary embodiment as shown in Fig. 3, the applicator 5 includes an outer skirt 52 and multiple nozzles 51. In one exemplary embodiment, the outer skirt 52 includes a pair of axial extending ribs 521 formed on the inner peripheral surface of the outer skirt 52. In one exemplary embodiment, the outer skirt 52 also includes a circumferential lip 522 on the inner peripheral surface thereof, and the circumferential lip 522 is interrupted in the position where the pair of axial extending ribs 521 is located. In one exemplary embodiment as shown in Fig. 3, the outer peripheral skirt 41 of the inner cap 4 includes a pair of axial extending ridges 411 in positions corresponding to the pair of axial extending ribs 521 of the applicator 5. The pair of axial extending ridges 411 will abut the pair of axial extending ribs 521 during operation to avoid the applicator 5 rotate with respect to the inner cap 4. In one exemplary embodiment, the inner cap 4 includes a circumferential rim 412 on the outer peripheral surface thereof, and when the applicator 5 is coupled to the inner cap 4, the circumferential lip 522 of the applicator 5 will slide over the circumferential rim 412 of the inner cap 4, so as to avoid the applicator 5 axially moving away from the inner cap 4. In this way, the applicator 5 is restricted from rotating or moving axially with respect to the inner cap 4. In other words, the applicator 5 is coupled to the inner cap 4 without any movement by means of the corresponding axial extending rib, ridge and circumferential rim and lip on the applicator 5 and the inner cap 4, respectively. In this way, applicator 5 and the inner cap 4 are formed as if they are an integral part, so that the device 1 for dispensing a liquid product is more convenient for use.

In one exemplary embodiment as shown in Figs. 4-5, a stop 35 in the outer screw cap 3 is axially extending from the ceiling 311 of the outer screw cap 3, and an inner peripheral skirt 42 is axially extending from the base part 40 of the inner cap 4 and coaxial with the outer peripheral skirt 41 on the inner cap 4, and a corresponding stop 44 in the inner cap 4 is extending axially from the base part 40 and radially from the outer periphery of the inner peripheral skirt 42, and when the inner cap 4 is rotated to the closed position, the corresponding stop 44 will abut the stop 35 with a clear click or audible sound.

As such, the present application uses a simple inner/outer sliding system in combination with the corresponding stops which creates a click or audible sound, the user can be reminded that the device is already in the closed position, and now no fluid product will flow out in this closed position.

In one exemplary embodiment, with continuous reference to Figs. 4-5, the outer screw cap 3 includes a curved axial groove 310 formed on the ceiling 311, and the curved axial groove 310 is coaxial with the collar 32 and the depth of the groove changes in the axial direction A, and the inner cap 4 includes an overhang 421 extending axially from the inner peripheral skirt 42, and during rotation of said inner cap 4 with respect to said outer screw cap 3, the overhang 421 will slide within said curved axial groove 310, accompany with the sliding of the slider 413 within the channel 321.

With reference to Figs. 6-7 and with continuous reference to Figs. 4-5, in one exemplary embodiment, the collar 32 includes at least one and preferably two axial slots 322 at either end of the channel 321, and when the inner cap 4 is rotated to the open position or the closed position, the slider 413 will slide into one of the two axial slots 322 accordingly. As such, when the device for dispensing a liquid product is in the open position or the closed position, the user will get a tactile feedback because the slider slides into the axial slots 322 which are deeper than the channel 321.

In one exemplary embodiment, the collar 32 includes two or four axial slots 322 which are spaced at the circumference thereof, and two channels 321 are diagonally formed the outer peripheral surface of the collar 32, and two sliders 413 are diagonally formed on the inner cap 4, so that the inner cap 4 rotates about 90 degrees to 180 degrees from the closed position to the open position. Such 90-180 degree rotation will help to operate the device more easily, and even the user can operate the device by one hand.

Moreover, the diagonally symmetric arrangement of the sliders and channels provides a more precise moving or rotating during the operation of the device, which prompts a perfect guidance to the open position. In one example, the four axial slots 322 are equally spaced at the circumference of the collar 32, and the inner cap 4 preferably rotates about 90 degrees from the closed position to the open position.

In one exemplary embodiment, with continuous reference to Figs. 4-7, the inner cap 4 and the outer screw cap 3 comprise a recess 43 and complementary recess 33 respectively, and the recess 43 is extending axially from the base part 40 and coaxial with the outer peripheral skirt 41 of the inner cap 4, and the complementary recess 33 is extending axially from the ceiling 311 and coaxial with the collar 32 on the outer screw cap 3. In one example, a post 34 is axially extending from the ceiling 311 and is located in the center of the complementary recess 33. In one example, when the inner cap 4 is in the closed position as shown in Fig. 6, the post 34 abuts the inner peripheral surface of the recess 43 so as to block the liquid product is from flowing out; when the inner cap 4 is in the open position as shown in Fig. 7, the liquid product will pass between the post 34 and the recess 43 and flow out, as shown in Fig. 7.

In one exemplary embodiment, as shown in Figs. 4 and 6, the post 34 is formed with an upstanding dome 341 at the free end, and when the inner cap 4 is in the closed position as shown in Fig. 6, the upstanding dome 341 abuts the inner peripheral surface of the recess 43, so as to seal the passageway for the fluid product.

In one exemplary embodiment, as shown in Figs. 4 and 5, holes 340 are formed in the ceiling 311 and located between the outer peripheral surface of the post 34 and the inner peripheral surface of the complementary recess 33, and apertures 430 are formed in base part 40 and within the recess 43. In one exemplary embodiment, the upstanding dome 341 cooperatively engages with the recess 43 to block the apertures 430 when the inner cap 4 is in the closed position, as shown in Fig. 6.

In one exemplary embodiment, as shown in Fig. 7, the collar 32 has a circumferential edge 324 on the outer peripheral surface thereof, and the outer peripheral skirt 41 has a corresponding circumferential edge 414 on the inner peripheral surface thereof for engaging with the circumferential edge 324, so as to avoid the inner cap 4 axially moving away from the outer screw cap 3.

In one exemplary embodiment, as shown in Fig. 4, the collar 32 has one or more strengthen ribs 323 axially extending on the inner peripheral surface of the collar 32 at the position corresponding to the channel 321. In this way, it is avoided that the channel 321 or the collar 32 is destroyed after multiple times of opening and closing of the device, because the strengthen ribs 323 add rigidity or strength to the channel 321 or the collar 32 of the outer screw cap 3.

In one exemplary embodiment, as shown in Fig. 6, when the inner cap 4 is in the closed position, the axial distance between the lowest end of the outer peripheral skirt 41 of the inner cap 4 and the ceiling 311 of the outer screw cap 3 is the smallest, and this axial distance is shown as "d1" in Fig. 6. In contrast, as shown in Fig. 7, when the inner cap 4 is in the open position, the axial distance between the lowest end of the peripheral skirt 41 of the inner cap 4 and the ceiling 311 of the outer screw cap 3 is the biggest, and this axial distance is shown as "d2"in Fig. 7. As one example, the range of d1 may be between 0.2～3 mm, and this small distance would be of help to provide good position between the inner cap 4 and the outer screw cap 3. Moreover, the range of d2 may be between 2.2～5 mm, and this small distance would be of help to avoid any twist when being pressed in a horizontal direction. As another example, a range of “d2 -d1” may be 0.2 mm～5 mm. In one example, d2 -d1 = 2 mm. In other words, when the inner cap 4 rotates from the closed position in Fig. 6 to the open position in Fig. 7, the inner cap 4 will lift up about 2 mm during the rotation. Such axial lift will help to create enough room or passageway for the liquid product to flow (even bulk flow) out to be dispensed.

Aspects of the present disclosure have been described in detail with reference to the illustrated embodiments; those skilled in the art will recognize, however, that many modifications may be made thereto without departing from the scope of the present disclosure. The present disclosure is not limited to the precise construction and compositions disclosed herein; any and all modifications, changes, and variations apparent from the foregoing descriptions are within the scope of the disclosure as defined by the appended claims. Moreover, the present concepts expressly include any and all combinations and subcombinations of the preceding elements and features.

LIST OF REFERENCE NUMBERS

1 device for dispensing a liquid product

2 container

3 outer screw cap

4 inner cap

5 applicator

6 massage head

31 cap body

32 collar

33 complementary recess

34 post

35 stop in outer screw cap

40 base part

41 outer peripheral skirt

42 inner peripheral skirt

43 recess

44 corresponding stop in inner cap

51 nozzle

52 outer skirt

61 massage protrusion

310 curved axial groove

311 ceiling

312 skirt part

321 channel

322 axial slot

323 strengthen rib

324 circumferential edge

340 hole

341 upstanding dome

411 axial extending ridges

412 circumferential rim

413 slider

414 corresponding circumferential edge

421 overhang

430 aperture

521 axial extending rib

522 circumferential lip

A axial direction

Claims

A device for dispensing a liquid product, comprising:

- a container (2) including an opening to dispense the liquid product;

- an outer screw cap (3) , which is configured to be mounted onto the container (2) ;

- an inner cap (4) , which is engageable with the outer screw cap (3) and movable thereon from an open position in which the liquid product is dispensed from the container (2) , to a closed position in which the liquid product is blocked from flowing out; and

- an applicator (5) coupled to the inner cap (3) and configured to dispense the liquid product therefrom;

characterized in that, a channel (321) is formed on a portion of the outer screw cap (3) for engaging with the inner cap (4) , and a slider (413) is formed on the inner cap (4) , and the slider (413) slides along the channel (321) during the rotation of the inner cap (4) with respect to the outer screw cap (3) between the open position and the closed position, and during the rotation towards the open position, the inner cap (4) will axially move away from the outer screw cap (3) .
The device according to claim 1, wherein:

the outer screw cap (3) includes a cap body (31) having a skirt part (312) for fastening onto the opening of the container and a ceiling (311) formed at the top portion of the skirt part (312) , and the outer screw cap (3) includes a collar (32) axial extending from the ceiling (311) , and the channel (321) is formed on the outer peripheral surface of the collar (32) and is inclined in the axial direction (A) , and

the inner cap (4) includes an outer peripheral skirt (41) and a base part (40) formed at the top end of the outer peripheral skirt (41) , and the slider (413) extends radially inwards from the inner peripheral surface of the outer peripheral skirt (41) , and during rotation of the inner cap (4) with respect to the outer screw cap (3) , the slider (413) will slide within the channel (321) .
The device according to claim 2, wherein a stop (35) is axially extending from the ceiling (311) of the outer screw cap (3) , and an inner peripheral skirt (42) is extending axially from the base part (40) and coaxial with the outer peripheral skirt (41) on the inner cap (4) , and a corresponding stop (44) is extending axially from the base part (40) and radially from the outer periphery of the inner peripheral skirt (42) , and when the inner cap (4) is rotated to the closed position, the corresponding stop (44) will abut the stop (35) with a click sound or audible sound.
The device according to claim 2, wherein the collar (32) includes at least one axial slot (322) at either end of the channel (321) , and when the inner cap (4) is rotated to the open position or the closed position, the slider (413) will slide into respective one of the axial slots (322) .
The device according to claim 4, wherein the collar (32) includes two or four axial slots (322) which are spaced at the circumference thereof, and two channels (321) are diagonally formed on the outer peripheral surface of the collar (32) , and two or four sliders (413) are diagonally formed on the inner cap (4) , so that the inner cap (4) rotates 90 degrees to 180 degrees from the closed position to the open position.
The device according to claim 2, wherein:

the inner cap (4) and the outer screw cap (3) comprise a recess (43) and complementary recess (33) respectively, and the recess (43) is coaxial with the outer peripheral skirt (41) of the inner cap (4) , and the complementary recess (33) is coaxial with the collar (32) on the outer screw cap (3) ; and

a post (34) is axially extending from the ceiling (311) and is located in the center of the complementary recess (33) ;

wherein when the inner cap (4) is in the closed position, the post (34) abuts an inner peripheral surface of the recess (43) so as to block the liquid product from flowing; when the inner cap (4) is in the open position, the liquid product will pass between the post (34) and the recess (43) .
The device according to claim 6, wherein:

the post (34) is formed with an upstanding dome (341) at the free end, and when the inner cap (4) is in the closed position, the upstanding dome (341) abuts the inner peripheral surface of the recess (43) .
The device according to claim 7, wherein:

holes (340) are formed in the ceiling (311) and located between the outer peripheral surface of the post (34) and the inner peripheral surface of the complementary recess (33) , and apertures (430) are formed in the base part (40) and within the recess (43) , and these holes (340) and apertures (430) form part of a passageway for liquid product.
The device according to claim 8, wherein the upstanding dome (341) cooperatively engages with the recess (43) to block the apertures (430) when the inner cap (4) is in the closed position.
The device according to claim 2, wherein:

the collar (32) has a circumferential edge (324) on the outer peripheral surface of the collar (32) , and the outer peripheral skirt (41) has a corresponding circumferential edge (414) on the inner peripheral surface thereof for engaging with the circumferential edge (324) , so as to avoid the inner cap (4) axially moving away from the outer screw cap (3) .
The device according to claim 2, wherein:

the collar (32) has one or more strengthen ribs (323) axially extending on the inner peripheral surface of the collar (32) at the position corresponding to the channel (321) .
The device according to claim 3, wherein:

the outer screw cap (3) includes a curved axial groove (310) formed on the ceiling (311) , and the curved axial groove (310) is coaxial with the collar (32) and the depth of the groove changes in the axial direction (A) , and

the inner cap (4) includes an overhang (421) extending axially from the inner peripheral skirt (42) , and during rotation of the inner cap (4) with respect to the outer screw cap (3) , the overhang (421) will slide within the curved axial groove (310) .
The device according to anyone of the preceding claims, wherein the applicator (5) includes a massage head, and the massage head is made of materials selected from the group of TPE, elastomer plastics, PU (Polyurethan) and silicone rubber, and has a shore hardness of A scale, which is preferably between 20 and 90.
The device according to anyone of the preceding claims, wherein the applicator (5) includes multiple nozzles (51) , and the massage head (6) is to be fitted onto the applicator (5) .
The device according to claim 14, wherein the massage head (6) includes multiple massage protrusions (61) corresponding to the multiple nozzles (51) , and the massage protrusion (61) is has a ball or oval shape.