Microneedle applicator

Abstract

A microneedle applicator comprising: an application surface (C11) provided with a fluid product outlet (C110) and a plurality of microneedles (C111); a motor (M1) for vibrating said microneedles (C111); a container (C13) connected to said fluid product outlet (C110); and an actuating member (I11) for delivering a fluid product from said container (C13) to said fluid product outlet (C110); and further comprising a motor module (M), a cartridge module (C1) and an intermediate module (I11) which are axially connected to each other. the motor module (M) houses the motor (M1), the cartridge module (C1) houses the fluid product container (C13) and forms the application surface (C11), the intermediate module (I1) is connected to the motor module (M) and the cartridge module (C1) and comprises the actuating member (I11) and a transmission means (I15) for transmitting vibrations generated by the motor (M1) to the microneedle (C111).

Description

Technical Field

[0001] The present invention relates to a microneedle applicator for applying a fluid product to the skin and allowing the applied fluid product to penetrate into the upper layer of the epidermis. The application field of the present invention is the field of cosmetics, not the field of tattooing. Its purpose is to enhance the effectiveness of skin beauty treatments, not to color the skin.

Background Art

[0002] Conventionally, this type of cosmetic applicator has an application surface provided with at least one fluid product outlet and a plurality of microneedles. A motor, often an electric motor, is used to vibrate the microneedles individually or together with the application surface. A fluid product container is connected to the fluid product outlet. The fluid product container may or may not be integrated with the applicator. When integrated, problems arise with its filling or replacement. The applicator can be made to have a removable container or a window for accessing the container.

[0003] On the other hand, an operating member for transporting the fluid product from the fluid product container to the fluid product outlet is also provided. This operating member often becomes a component that also controls the motor, and thus has two functions: vibrating the microneedles and sending the fluid product from the container to the application surface.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention aims to propose an extremely simple applicator that allows for the discharge of fluid products with simple and intuitive use, and is just right in both design and operation. [Means for solving the problem]

[0006] To achieve the above objective, the present invention provides a microneedle applicator for applying a fluid product to the skin and allowing it to penetrate the skin, comprising: an application surface provided with at least one fluid product outlet and a plurality of microneedles; a motor for vibrating the microneedles; at least one fluid product container connected to the fluid product outlet; and an operating member for sending the fluid product from the fluid product container to the fluid product outlet, further comprising a motor module, a cartridge module, and an intermediate module connected to each other in the axial direction of the longitudinal axis of the microneedle applicator, wherein the motor module houses the motor and components for operating the motor; the cartridge module houses the fluid product container and forms the application surface; the intermediate module is connected to the motor module and is detachably connected to the cartridge module, and comprises the operating member and transmission means for transmitting vibrations generated by the motor of the motor module to the microneedles of the cartridge module.

[0007] Thus, the discharge of the fluid product is manually controlled by the user operating the working members of the intermediate module with their fingers. Therefore, it is understood that the cartridge module is technically very simple, as it contains no electrical or electronic components and very few mechanical parts. The cartridge module consists of an inexpensive, replaceable cartridge or refill that can be easily detached and connected to the intermediate module by the user.

[0008] Furthermore, the intermediate module is relatively simple because it mainly integrates mechanical transmission means, namely vibration transmission means, and thrust transmission means, which convert the movement of the working member into thrust to the fluid product container. The motor module itself integrates the motor, its power supply, and its control, and therefore constitutes a complex and expensive module.

[0009] By dividing the applicator into three different modules—a first module that is very simple, inexpensive, and replaceable; a second module that is simple but durable; and a third module that is complex and expensive—and configuring the intermediate module to fit standard motor modules and specific cartridge modules, it becomes possible to combine various models of cartridge modules with the standard motor module.

[0010] More specifically, the intermediate module is designed to transmit vibrations from the motor module to the microneedles of the cartridge module, causing the fluid product in one or more containers of the cartridge module to be discharged. Appropriate working members and possible appropriate thrust transmission devices are housed within the intermediate module.

[0011] Therefore, the structure of the microneedle applicator according to the present invention can be likened to a three-stage rocket, comprising an upper stage for consumables, a lower stage for technical operations, and an intermediate stage for vibration transmission and operation.

[0012] This allows cosmetic manufacturers to select or design specific cartridge modules without having to worry about the motor module, because the transmission of vibrations and the control of the operation of one or more fluid product containers are handled by an intermediate module specifically adapted to both the motor module and its particular cartridge module.

[0013] The intermediate module thus acts as a modular interface, enabling the uncorrelated operation between the motor module and the cartridge module. This allows for the use of standard motor modules and offers a wide range of microneedle applicators at a low cost.

[0014] Advantageously, the intermediate module can also be detachably connected to the motor module, for example, by screw-in or plug-in connections. Detachable connections allow for handling (connection and disconnection) without the need for external devices.

[0015] In variations, the intermediate module can be permanently connected and secured to the motor module, or connected and secured in a way that makes removal difficult. In both cases, the two modules are initially separate but are integrated in a way that makes them inseparable from each other.

[0016] Advantageously, the fluid product container has a variable volume, and the movement of the actuator reduces the volume of the fluid product container, so that at least a portion of the contents of the fluid product container is delivered to the fluid product outlet with each actuation. Thus, the actuator acts directly or indirectly on the fluid product container without using active intermediate members such as pumps or motors. The cartridge module may comprise a single fluid product container that is completely or preferably partially emptied with each actuation. In a modified example, the cartridge module may comprise several (or more) fluid product containers that are successively emptied (partially or preferably completely) with each actuation.

[0017] Advantageously, the fluid product container may have movable or deformable walls which are moved along or across the longitudinal axis X in response to the operation of an actuating member.

[0018] According to a preferred design, the microneedle applicator may have a general pen shape, suitable for holding between the thumb and middle finger and operating the actuarial member with the index finger. It can also be held in the palm and operated with the thumb.

[0019] According to another aspect of the present invention, the cartridge module can be removably connected to the intermediate module by a connection that combines axial movement and rotational movement, such as screwing or inserting.

[0020] According to a practical first embodiment of the present invention, the actuator may be equipped with a lateral push button that moves an actuator rod axially, and the actuator rod acts progressively on the fluid product container to continuously deliver a fluid product volume to the fluid product outlet.

[0021] Therefore, the lateral movement of the actuating member has the effect of displacing the actuating rod axially, which is pressed against the movable wall (deformable wall or scraper piston) of the fluid product container. Each actuation generates a limited movement of the actuating rod, dispensing a fluid product dose from the fluid product container, which may contain one or more doses, for example, four doses. The actuating rod performs a thrust transmission function; that is, the lateral thrust of the actuating member is converted into axial thrust of the actuating rod.

[0022] Advantageously, the actuating rod can move axially from its starting position to several consecutive forward positions against the return spring, while a catch mechanism prevents it from returning to its original position due to elastic force, locking it in place.

[0023] Preferably, the catch device is provided with a disengagement means that enables the catch device to release the operating rod, which in turn elastically returns the operating rod to its starting position.

[0024] Advantageously, the release means is forced into a non-released state by the connection of the cartridge module to the intermediate module, and is resiliently brought into a released state by the separation of the cartridge module. Advantageously, the release means can move from a free state corresponding to the released state to a constrained state corresponding to the non-released state by means of a cam formed by the cartridge module, and as soon as the engagement with the cam is released, it comprises an engagement member that can move from the constrained state to the free state by means of a return spring.

[0025] Thus, in embodiments using a single fluid product container, the connection of the cartridge module to the intermediate module has the effect of disabling the release means and keeping it inoperative until the cartridge module is removed from the intermediate module. When the cartridge module is removed, the release means executes a reset function of the actuating rod, and regardless of the position of the forward position of the actuating rod, the actuating rod automatically returns to the starting position where it has retracted. The user does not need to perform an operation to return the actuating rod to the starting position.

[0026] The engagement between the cam of the cartridge module and the engagement member of the release means serves a function of authenticity of the cartridge module, since this engagement is comparable to that existing between a lock and a key. More generally, it can be said that the cartridge module and the intermediate module together form specific identification means that guarantee the authenticity of the cartridge module. These specific identification means can be constituted by the engagement between the cam of the cartridge module and the engagement member of the release means, but can also be constituted by any cooperative or complementary engagement between these two modules.

[0027] Of course, in the absence of an engagement member and a cam, it is up to the user to operate the release means to reset the actuating rod.

[0028] It should be noted that the axially moving actuating rod, associated with the catch device and preferably with the disengagement means, is a characteristic that allows it to be implemented in an applicator comprising only two modules: a motor module integrating the motor, actuating member, actuating rod, catch device, and preferably disengagement means, and a cartridge module identical or similar to those already described, which can function to neutralize or release the disengagement means during assembly and disassembly.

[0029] In other words, two-module applicators, or even single-module applicators, that have interchangeable fluid product containers may require protection against these characteristics.

[0030] According to a practical second embodiment of the present invention, the cartridge module may include a rotating cylinder that supports several fluid product containers, the rotating cylinder which can move these fluid product containers to a position where they are to be emptied in sequence, and the intermediate module includes a lateral push button that acts on the fluid product container in the position to be emptied to send its contents to the fluid product outlet.

[0031] According to the first modification, the lateral push button can move the actuating rod axially from its starting position to an extended position corresponding to the position where the fluid product container is maximally empty, against the force of a return spring. The actuating rod performs a thrust transmission function, and the lateral thrust of the push button is converted into an axial thrust of the actuating rod.

[0032] According to the second modification, a lateral push button can act directly on the fluid product container through a lateral window of the rotating cylinder.

[0033] Advantageously, the intermediate module can be equipped with an actuation mechanism for rotating the rotary cylinder of the cartridge module.

[0034] Preferably, the coating surface of the cartridge module can be locked to rotate by an intermediate module, and each fluid product container may be provided with a removable closing member that is removed by an opening material integrated with the coating surface before the container reaches a position where it is emptied.

[0035] For example, the fluid product container can be supplied in the form of a small, flexible vial with a closing head that is cut by a fixed blade just before reaching the emptying position, and a push button that crushes the fluid product container when it reaches the emptying position, thereby delivering the contents of the fluid product container to the application surface.

[0036] It should be noted that a rotary cylinder with multiple fluid product containers, involving lateral or axial movement, has the characteristic of being implementable in an applicator with only two modules: a motor module integrating a motor and a lateral push button, and a cartridge module with a cylinder identical or similar to those already described. In other words, protection against such characteristics may be required for two-module applicators, or even single-module applicators, if they have interchangeable fluid product containers.

[0037] In another embodiment, the coating surface may comprise a plate, which may have microneedles and holes leading to a fluid product outlet. The fluid product outlet may also be located at the periphery of the coating surface.

[0038] Advantageously, the applicator may further include means for adjusting the microneedle penetration depth by acting advantageously on the axial position of the motor within the first module. In practice, depending on the cosmetic, the desired treatment, or the quality and nature of the skin, it may be useful to increase or decrease the microneedle penetration depth.

[0039] Furthermore, the applicator is equipped with means for controlling the motors and can automatically disable them when each module is not connected. This is for safe use.

[0040] The scope of the present invention is to divide a microneedle applicator device into three modules, units, or subunits, comprising a standard module, a custom-made disposable module, and an intermediate module that provides communication between the other two modules and incorporates means for dispensing fluid products from one or more fluid product containers toward the application surface of the disposable module equipped with microneedles. [Brief explanation of the drawing]

[0041] The present invention will be fully described below with reference to the accompanying drawings, which illustrate several embodiments of the present invention as non-limiting examples. [Figure 1] This is a schematic perspective view including a portion of the microneedle applicator in the first embodiment of the present invention that has been passed through. [Figure 2] Figure 1 is a cross-sectional view perpendicular to the axial direction of the applicator shown. [Figure 3] Figure 2 is a cross-sectional view perpendicular to the axial direction, showing the applicator in a disassembled state. [Figure 4] This is a cross-sectional view perpendicular to the axial direction, showing the applicator in operation. [Figure 5] This is a cross-sectional view perpendicular to the axial direction showing the applicator in a disengaged state. [Figure 6] (a) and (b) are very schematic diagrams intended to illustrate one embodiment of the disengagement mechanism and its operation. [Figure 7] (a) and (b) are diagrams showing another embodiment of the disengagement means and its operation. [Figure 8] This is a vertical and horizontal cross-sectional view of the cartridge and intermediate module of a microneedle applicator in a second embodiment of the present invention. [Figure 9](a) and (b) are similar to Figure 8 in terms of the operating position and the return position. [Figure 10] (a) and (b) are vertical cross-sectional views showing the idle state and operating state of the microneedle applicator in the third embodiment of the present invention. [Figure 11] Figures 10(a) and (b) are perspective views showing the applicator in a disassembled state. [Modes for carrying out the invention]

[0042] The applicator according to the present invention is purely for cosmetic use, and even for dermatological use. However, tattoos are excluded. The applicator combines two treatment means: dispensing a cosmetic, which may be a cream, balm, lotion, serum, etc., and puncturing the epidermis by perforating the stratum corneum with microneedles without touching the dermis. Depending on the nature of the cosmetic and the desired result, the cosmetic is applied before, simultaneously with, or after microneedle puncture.

[0043] The applicator according to the present invention is more for home use, in that it is used by the user alone. However, it can also be used professionally.

[0044] In three embodiments of the present invention illustrated, the applicator comprises three distinct modules: a first motor module M, second cartridge modules C1, C2, and C3, and third intermediate modules I1, I2, and I3. The intermediate modules I1, I2, and I3 are incorporated between the motor module M and the cartridge modules C1, C2, and C3, or inserted between them. Thus, the intermediate modules I1, I2, and I3 form a coupling between the motor module M and the cartridge modules C1, C2, and C3.

[0045] The three modules are arranged along the longitudinal axis X.

[0046] Intermediate modules I1, I2, and I3 are advantageously detachably connected to motor module M. Permanent connections between these two modules are possible. Intermediate modules I1, I2, and I3 are advantageously detachably connected to cartridge modules C1, C2, and C3. Permanent connections are possible in some cases.

[0047] Preferably, each module can be easily and quickly connected or disconnected by the user themselves, for example, by the user using both hands to apply torque and / or pushing or pulling force between two modules. When the three modules are assembled, the applicator takes on a general pen-like configuration along the longitudinal axis X. The applicator can also be gripped in the same way as a pen.

[0048] The first motor module M can be common to both embodiments. This is not important to the present invention and will not be described in detail. A standard commercially available module can be used.

[0049] In Figure 1, it can be seen that the motor module M includes a motor M1, which is preferably an electric motor. The motor M1 can be a small rotary motor that rotates its shaft M10. It can also be configured to include an electromagnetic motor, a linear motor, or a piezoelectric motor. The motor M1 is powered by a battery M2 and controlled by electronic equipment M3. The electronic equipment M3 manages the rotational speed of the shaft M10, the motor's start sequence and operating time, etc. An external start button M21 allows the user to switch the applicator on.

[0050] The free end of shaft M10 is capped with case M5, and the rotation of shaft M10 is converted into axial vibration, which is then transmitted by output shaft M50 connected to an intermediate module.

[0051] Of course, this is merely one non-limiting embodiment, and any motor module M suitable for generating axial vibrations can be implemented within the scope of the present invention, provided that the motor module M is not critical to the present invention.

[0052] Next, with reference to Figure 2, the structures of the cartridge module C1 and intermediate module I1 of the applicator in the first embodiment of the present invention will be described in detail.

[0053] The cartridge module C1 comprises a cartridge body C10, with a connecting collar C101 at one end and a fluid product outlet C110 at the other end. The cartridge module C1 also includes a coating surface C11 on which a plurality of microneedles C111 are provided. This coating surface C11 is positioned adjacent to the fluid product outlet C110. The coating surface C11 is connected to a vibration transmission rod C12 that penetrates the cartridge body C10.

[0054] The cartridge module C1 includes a fluid product container C13. The fluid product container C13 is slidably positioned within a chamber C103 formed by the cartridge body C10. A puncture needle C104 formed in the cartridge body C10 is located at the bottom of this chamber C103, and the puncture needle C104 is in direct communication with the fluid product outlet C110 via a conduit.

[0055] The fluid product container C13 includes a pusher piston C14 that is slidably assembled within the container to change its effective volume. Thus, the fluid product container C13 may be provided in the form of a cylinder with the pusher piston C14 at one end and a perforated membrane C131 at the other end that is punctured by a puncturing needle C104 of the cartridge body C10. Furthermore, the fluid product container C13 can be removed from the cartridge body C10 after use and made a replaceable component for a new replacement container.

[0056] The cartridge module C1 is removably connected to the intermediate module I1, particularly by rotation (bayonet or screw-in), and the intermediate module I1 is equipped with a connecting crown I101 that can stably accept the collar C101 after rotation.

[0057] This connecting crown I101 is formed on the body I10, which is advantageously also removablely connected to the motor module M. This connection can be made by screwing, plugging, or snap-fitting. Permanent connections are also possible.

[0058] The intermediate module I1 includes an actuation member I11 in the form of a lateral push button that moves perpendicular to axis X. This actuation member I11 can be configured to protrude from the main body I10 through a side window of the main body I10. The actuation member I11 includes a thrust pad I111. The function of the thrust pad I111 will be described later. These pads I111 extend inward from the main body I10 at an angle.

[0059] The intermediate module I1 also includes an operating rod I12 extending parallel to axis X. This operating rod I12 includes a thrust plate I121 that contacts the pusher piston C14 of the fluid product container C13 of the cartridge module C1. The operating rod I12 includes several teeth I123 and thrust lugs (not shown) aligned along its longitudinal direction.

[0060] On the end opposite the thrust plate I12, a stub I122 is formed to support a return spring I124. This return spring I124 biases the actuating rod I12 away from the pusher piston C14.

[0061] The thrust pad I111 of the operating member I11 engages with the thrust lug (not shown) on the operating rod I12, and by pushing down the operating member I11, the operating rod I12 moves towards the side where the pusher piston C14 is located. The inclined orientation of the thrust pad I111 has the effect of moving the operating rod I12 toward the pusher piston C14.

[0062] The intermediate module 10 also includes a catch device I13 which includes a notch I130 that continuously engages with the teeth I123 of the actuating rod I12. In other words, the catch device I13 allows the actuating rod I12 to remain in its position after each actuation of the actuating member I11. Without this catch device I13, the actuating rod I12 would be biased by the return spring I124 to return to its original position each time. Therefore, the catch device I13 makes it possible to neutralize the biasing by the return spring I124.

[0063] The intermediate module I1 also includes disengagement means I14 that enable the catch device I13 to disengage from the actuation rod I12. These disengagement means I14 can consist of, for example, a plate I140 mounted to swing around an axis I141 that is integral with the main body I10.

[0064] This plate I140 is connected to the catch device I13 by a connecting rod I134. An engaging member I143 is provided at the end of the plate I140, which engages with the connecting crown I101. A spring I142 biases the plate I140 in a direction that disengages the engaging member I143 from the crown I101. The functions of these disengagement means will be described later.

[0065] The intermediate module I1 also includes a vibration transmission bar I15 that connects the output shaft M50 of the motor module M to the vibration transmission rod C12 of the cartridge module C1.

[0066] Figure 3 shows the applicator with the cartridge module C1 detached from the intermediate module I1. The connecting collar C101 has been removed from the connecting crown I101. Note that at this point, the fluid product container C13 is not fully fitted inside the chamber C103 of the cartridge body C10.

[0067] In other words, the puncturing needle 104 has not yet penetrated the membrane C131 of the fluid product container C13, and therefore the pusher piston C14 is protruding from the outside of the cartridge body C10. The cartridge module is in its initial position before use, and the fluid product container C13 is sealed.

[0068] While the cartridge module C1 is connected to the intermediate module I1, the thrust pad I104 formed by the main body I10 pushes the fluid product container C13 in the direction of the puncturing needle C104, puncturing the membrane C131 of the container C13. In this way, the fluid product container C13 is positioned in the usage position.

[0069] After that, all the user needs to do is rotate the cartridge module C1 to engage its connecting collar C101 with the connecting crown I101 of the intermediate module I1.

[0070] When connected, the thrust plate I121 of the operating rod I12 is slightly pressed against, or not pressed against, the pusher piston C14 of the fluid product container C13. The intermediate module I1 is in its initial configuration, as shown in Figure 2.

[0071] Therefore, the user can apply thrust to the actuator I11 so as to push the actuator I11 into the main body I10 of the intermediate module I1.

[0072] At this time, the thrust pad I111 engages with the thrust lug (not shown) of the actuation rod I12, causing the actuation rod I12 to move axially and push the pusher piston C14.

[0073] At the end of the operation, a tooth I123 of the operating rod I12 engages with a notch I130 of the catch device I13. After two consecutive operations, the applicator is configured as shown in Figure 4. Two doses of the fluid product have been dispensed through the fluid product outlet C110, which is located near the application surface C11 equipped with the microneedle C111. In Figure 4, it can be seen that two doses of the fluid product remain. Each time a dose is dispensed, one tooth I123 of the operating rod I12 engages with a notch I130 of the catch device I13.

[0074] Thanks to the disengagement means I14, the user can return the actuarial rod I12 to its initial position at any time. This is shown in Figure 5. It can be seen that the plate I140 swings around its axis I141, and its engaging member I143 disengages from the connecting crown I101. This disengagement is also facilitated by the spring I142. All the user needs to do to get it into this state is to push the portion of the plate I140 that is to the right of the swing axis I141.

[0075] By pushing this plate I140, the connecting rod I134 moves and the catch device I13 tilts, causing the notch I130 of the catch device I13 to disengage from the tooth I23 of the operating rod I12, which it had been engaged with. In Figure 5, it can be seen that the notch I130 has disengaged from the first tooth I123, and the operating rod I12 has returned to its initial position due to the action of the return spring I124.

[0076] Therefore, in this embodiment, the intermediate module I1 can act continuously on the fluid product container C13 to deliver a continuous fluid product dose.

[0077] The catch device I13 allows the actuation rod I12 to be stopped in its position after each operation, and the disengagement means I14 allows the actuation rod I12 to be returned to its initial position. Here, the disengagement means is operated manually, and the user must operate the plate 140 to detach the catch device I13 from the actuation rod I12.

[0078] Referring to Figures 6(a) and (b), it can be seen in a very schematic manner how the operation of the disengagement mechanism can be automated. The rod I12 is schematically represented along with its thrust plate and its teeth I123. The catch device I13 is also schematically represented.

[0079] The disengagement means I14' also comprises a plate or rail I140 mounted to pivot about axis I141.

[0080] The disengagement means I14' includes an engaging member I143' at the other end that engages between two cams C151 and C152 formed by the body C10 of the cartridge module C1. The cams C151 and C152 are inclined or eccentric so that the engaging member I143' can move around the pivot axis I141.

[0081] Figure 6(a) shows the disengagement means I14' in the undisengaged state, where the catch device I13 is engaged with the teeth I123 of the operating rod I12. This operating position is reached when the cartridge module C1 is connected to the intermediate module I1.

[0082] Figure 6(b) shows that the cam C151 drives the plate or rail I140 downward by swinging around the axis I141. This disengages the catch device I13 from the teeth I123 of the actuating rod I12. This disengagement is achieved when the cartridge module C1 is rotated relative to the intermediate module I1 until it is removed from the intermediate module I1. The plate or rail I140 can be held in the disengaged position shown in Figure 6(b) by a spring corresponding to the spring I142 shown in the preceding figures.

[0083] Through this very schematic embodiment, it can be understood that by utilizing the rotation of the cartridge module C1 relative to the intermediate module I1, the disengagement means I14' can be automatically activated simply by connecting / disconnecting the cartridge module C1 to the intermediate module I1.

[0084] Thus, the separation of the cartridge module C1 from the intermediate module I1 automatically triggers the operation of the disengagement means, which allows the actuation rod I12 to return to its stationary position within the main body I10, so the user does not even need to worry about returning the actuation rod I12 to its initial position.

[0085] Figures 7(a) and 7(b) are extremely schematic diagrams to illustrate that the disengagement mechanism can be activated even by a simple axial movement of the cartridge module C1 relative to the intermediate module I2.

[0086] The disengagement means I14'' includes an engaging member I143'' that engages with the housing C16 formed in the cartridge module C1 when the cartridge module C1 is connected to the intermediate module I1. The catch device I13 engages with one tooth I123 of the operating rod I12.

[0087] As soon as the cartridge module C1 is detached from the intermediate module I1, the engaging member I143'' is released from the housing C13, allowing the disengagement means to swing around the axis I141 and disengage the tooth I123 from the catch device I13. This is shown in Figure 7(b).

[0088] This schematic example demonstrates that the disengagement mechanism can also be activated by the translational motion of the cartridge module C1 relative to the intermediate module I1.

[0089] The intermediate module I1 preferably comprises a lateral actuation member I11, an actuation rod I12 with axial movement, a catch device I13, and a manual disengagement means I14 or an automatic disengagement means I14' or I14'', and is detachably connected to both the motor module M and the cartridge module C1. However, embodiments in which the intermediate module I1 is integrated with the motor module M and / or the cartridge module C1 can also be imagined. An integrated applicator in which the fluid product container C13 can be replaced through an access window can also be imagined. In particular, the disengagement means constitute a feature that can be implemented in any applicator containing containers of multiple capacities.

[0090] The following two embodiments, described below, share several common features.

[0091] First, the intermediate module includes a thrust member that acts on the container of the cartridge module. The thrust member returns to its initial starting position each time. Therefore, it does not perform continuous forward movement as in the first embodiment of the present invention. With respect to the cartridge module, a rotating cylinder loaded with multiple containers is incorporated. The user can rotate the cylinder to align one container with the thrust member so that a large portion of the container, or preferably the container, can be emptied completely.

[0092] The user then only needs to rotate the cylinder so that the next container aligns with the thrust member. It will be found that the rotational drive of the rotating cylinder can be performed directly on the cartridge module or even on the intermediate module. Of course, the intermediate module includes vibration transmission means that enable the vibrations generated by the motor module M to be transmitted to the coating surface of the cartridge module where the microneedles are provided.

[0093] Furthermore, similar to the first embodiment of the present invention, the motor module M can be detachably connected to the intermediate module. Similarly, the intermediate module can be detachably connected to the cartridge module by rotational motion or simple axial translational motion.

[0094] Next, a second embodiment of the present invention will be described with reference to Figure 8 and Figures 9(a) and 9(b). The motor module M is shown only in a very schematic manner, but it can be identical or similar to that of the first embodiment.

[0095] The intermediate module I2 comprises a body I20 through which a vibration transmission member I25, substantially or entirely axially extending, passes. The body I20 includes an axially moving actuation rod I22. This actuation rod I22 is biased by a spring I224 in the direction in which the motor module M is located.

[0096] The operating rod I22 includes a thrust plate I221 that contacts one of the multiple containers of the cartridge module, as shown below. The operating rod I22 is connected to the operating member I21 by a connecting rod I211.

[0097] The actuating member I21 can move perpendicular to the axis X of the applicator, similar to the first embodiment. The connecting rod I211 is used to convert the lateral or transverse movement of the actuating member I21 into a simple axial movement of the actuating rod I22.

[0098] The actuation member I21 is pushed into the main body I20 against the biasing force of the return spring I224, which returns the actuation rod I22 and the actuation member I21 to the starting position shown in Figures 8 and 9(b).

[0099] Figure 9(a) shows the position where the actuating member I21 is fully depressed. Therefore, each time the actuating member I21 is pushed in, the actuating rod I22 moves from the initial starting position (Figure 8 or Figure 9(b)) to the maximum extension position (Figure 9(a)), and then returns to the initial starting position by the action of the return spring I224. Thus, there is no intermediate position as in the first embodiment. Consequently, the mechanism of the intermediate module I2 is simpler than the mechanism of the intermediate module I1 in the first embodiment.

[0100] The cartridge module C2 includes a body C20 which is fixed to the body I20 of the intermediate module I2 when the cartridge module C2 is placed in a predetermined position on the intermediate module I2. The cartridge module C2 supports a coating surface C21 on which microneedles C211 are provided.

[0101] The coated surface C21 is connected to a vibration transmission rod or rail C22, which is coupled to a vibration transmission member I25 of the intermediate module I2.

[0102] The main body C20 also defines a fluid product outlet C210 located near the coating surface C21. This fluid product outlet C210 is connected to the piercing needle C203 through a conduit.

[0103] The cartridge module C2 also includes a rotary cylinder C23 that is rotatably mounted on or inside the main body C20. The user can rotate the rotary cylinder C23 by operating the outer circumference of the accessible rotary cylinder C23.

[0104] The rotating cylinder C23 includes several fluid product containers C24, which may be supplied in the form of collapsible pouches or piston reservoirs. Each reservoir C24 has a front wall 241 that can be punctured by a puncturing needle C203.

[0105] As shown in Figure 8, in the initial position, the membrane C241 is intact and adjacent to the puncture needle C203. In this initial starting position, the thrust plate I221 of the working rod I22 is located near the bottom of one fluid product container C24.

[0106] The lateral thrust applied to the actuating member I21 causes the actuating member I21 to move, which in turn causes the actuating rod I22 to move axially via the connecting rod I211. The thrust plate I221 of the axially moving actuating rod I22 first pushes the fluid product container C24 inside the cylinder, piercing the membrane C241 of the container with the piercing needle C203, and then crushes the container C24 so that the contents of the fluid product container C24 are sent to the fluid product outlet 210.

[0107] Figure 9(a) shows the operating member I21 in the fully depressed position, with the thrust plate I221 at its maximum forward position. At this time, the fluid product container C24 is empty or nearly empty.

[0108] As soon as the user releases the pressure on the actuator I21, the actuator I21 returns to its initial starting position under the biasing force of the return spring I224. This state is shown in Figure 9(b). The next thing the user needs to do is rotate the rotary cylinder C23 until another fluid product container C24 is positioned opposite the thrust plate I221 of the actuator rod I22. Thus, a complete cycle is achieved.

[0109] In this embodiment, the entire cartridge module C2 can be replaced once all fluid product containers C24 are empty.

[0110] In variations, it is possible to replace only the rotating cylinder C23, or to replace only the fluid product container C24 while leaving the rotating cylinder C23 in place. Thus, it can be seen that several methods can be used while maintaining the same architecture for the cartridge module C2.

[0111] Another possible configuration involves mounting the cartridge module C2 on a main module that integrates both the motor module M and the intermediate module I2. In other words, the operating means of the intermediate module I2 are integrated into a common module or main module that incorporates all the means for operating both the coating surface C21 and the fluid product container C24.

[0112] Figures 10(a), (b) and 11 illustrate a third embodiment according to the present invention, in which the cartridge module C3 also incorporates a rotating cylinder C33 that receives several fluid product containers C34.

[0113] Similar to the second embodiment, the entire cartridge module C3, only its cylinder C33, or only its fluid product container C34 can be replaced. The cartridge module C3 comprises a fixed body C30 forming a fluid product outlet C310 and a cutting blade C301. The function of the cutting blade C301 is as follows.

[0114] The coating surface C31, which has microneedles C311, is positioned in direct proximity to the fluid product outlet C310. This coating surface C31 is connected to a vibration transmission rod or rail C32 that engages with vibration transmission means (not shown) of the intermediate module I3.

[0115] The rotating cylinder C33 is rotatably housed on or within the main body C30. The rotating cylinder C33 has a lateral window C333 that allows access to the fluid product container C34, which has a removable closing member C341 that protrudes into a conduit C302 connected to the fluid product outlet C310.

[0116] As cylinder C33 rotates, the closing member C341 of the fluid product container C34 engages with the cutting blade C301, causing the cutting blade C301 to separate the closing member C341 from the rest of the container C34.

[0117] Figure 10(a) shows that the removable closure member C341 has fallen to the bottom of the main body C30. This closure member C341 is the closure member of the fluid product container C34, which is positioned opposite the conduit C302. It can also be seen that another container located below the fluid product container C34 still has a removable closure member C341 facing into the main body C30.

[0118] Therefore, it can be said that the cutting blade C301 functions as an opening member that releases the seal on the fluid product container C34 and opens the container as the rotating cylinder C33 rotates. Advantageously, the fluid product container C34 can take the form of a small, collapsible vial made of a deformable material.

[0119] The intermediate module I3 comprises a body I30, within which a rotary actuation ring I34 is housed. This rotary actuation ring I34 engages with cylinder C33 to enable rotational driving of cylinder C33. As shown in Figure 11, the rotary actuation ring 134 includes an indication of usage that can be visually observed through a window in the body I30.

[0120] The intermediate module I3 also includes an actuation member I31, which is a very simple lateral push button that can be pressed by the user with their finger. This lateral push button may take the form of a pad and is reliably guided by a stack formed on the main body 130.

[0121] When one fluid product container C34 is positioned below the operating member I31, its removable closing member C341 has already been removed from the container C34 by the cutting blade C301. Figure 10(a) shows the state after the closing member C341 has been removed.

[0122] All the user needs to do is push down the actuator I31 to engage it with the flexible fluid product container C34, thereby crushing the container C34. Figure 10(b) shows the fluid product container C34 in the crushed state. This causes the fluid product inside the fluid product container C34 to be sent through the conduit C302 to the fluid product outlet C310.

[0123] When the user releases their pressure on the actuator 131, the actuator 131 returns to its resting position by a return spring (not shown) or by the elastic restoration of the fluid product container C34, which returns to its initial position after being emptied. After applying the fluid product to the skin using the application surface 31, the user can repeat the action of rotating the actuator ring I34 to bring the next fluid product container C34 under the actuator I31.

[0124] In this embodiment, it should be noted that the cartridge module C3 is almost entirely housed within the intermediate module I3, with only a portion of its main body C30 protruding forward.

[0125] Although not shown, the intermediate module 13 may include an access hatch that allows access to the side window C333 of the cylinder C33 for removal and insertion of the fluid product container C34.

[0126] The intermediate module I3 is equipped with a connection means I36 suitable for engagement with the motor module M.

[0127] In the three embodiments described above, the microneedle applicator according to the present invention preferably comprises three separate, interconnected modules or stages that are removable.

[0128] Intermediate modules I1, I2, and I3 always include working members I11, I21, and I31 and vibration transmission means I15 and I25. Cartridge modules C1, C2, and C3 always include coating surfaces C11, C21, and C31 with microneedles C111, C211, and C311 and fluid product outlets C110, C210, and C310. The cartridge modules also include vibration transmission members that enable the coating surfaces to be connected to the vibration transmission means of the intermediate modules.

[0129] While certain features have been described in relation to this three-stage / module architecture, it should be understood that these features can be implemented in different architectures. In particular, the actuation mechanism in the first embodiment can be applied to any microneedle applicator, regardless of whether the microneedle applicator consists of one, two, or three stages or modules.

[0130] Similarly, the rotating cylinders C23 and C33 are described in relation to this three-stage or three-module architecture. However, these cylinders can also be implemented in any microneedle applicator, whether it consists of three stages, two stages, or just one stage.

[0131] The main objective of the three-stage module architecture according to the present invention is to enable the adaptation of a wide variety of cartridge modules to a standard motor module, thanks to the adaptability and modularity of the intermediate stage.

Claims

1. A microneedle applicator for applying and penetrating fluid products into the skin, A coating surface (C11; C21; C31) provided with at least one fluid product outlet (C110; C210; C310) and a plurality of microneedles (C111; C211; C311), A motor (M1) for vibrating the aforementioned microneedles (C111; C211; C311), At least one fluid product container (C13; C24; C34) connected to the fluid product outlet (C110; C210; C310), Actuators (I11; I21; I31) that send the fluid product from the fluid product container (C13; C24; C34) to the fluid product outlet (C110; C210; C310), Equipped with, Furthermore, the microneedle applicator includes a motor module (M), cartridge modules (C1; C2; C3), and intermediate modules (I1; I2; I3) that are interconnected in the axial direction of the longitudinal axis X of the microneedle applicator. The motor module (M) houses the motor (M1) and components for operating the motor (M1), The cartridge module (C1; C2; C3) houses at least one of the fluid product containers (C13; C24; C34) and forms the coating surface (C11; C21; C31), The aforementioned intermediate modules (I1; I2; I3) are It is connected to the motor module (M) and is also detachably connected to the cartridge modules (C1; C2; C3), The aforementioned operating members (I11; I21; I31) The system includes transmission means (I15; I25) for transmitting vibrations generated by the motor (M1) of the motor module (M) to the microneedles (C111; C211; C311) of the cartridge module (C1; C2; C3), The cartridge modules (C1; C2; C3), the intermediate modules (I1; I2; I3), and the motor module (M) are arranged in this order along the axial direction, In this arrangement, the sides of the main bodies (C10; C20; C30) of the cartridge modules (C1; C2; C3) and the sides of the main bodies (I10; I20; I30) of the intermediate modules (I1; I2; I3) are exposed. The fluid product containers (C13; C24; C34) have a variable volume. The operating members (I11; I21; I31) protrude from the side windows of the main body (I10; I20; I30) of the intermediate module (I1; I2; I3) and are equipped with a receiving portion that receives a downward push operation by the user. When the receiving portion is pushed down, the movement of the operating members (I11; I21; I31) associated with the push causes the downward force to act on the fluid product container (C13; C24; C34), reducing the volume of the fluid product container (C13; C24; C34), and at least a portion of the contents of the fluid product container (C13; C24; C34) is sent to the fluid product outlet (C110; C210; C310). A microneedle applicator characterized by the following features.

2. The intermediate modules (I1; I2; I3) are detachably connected to the motor module (M). The microneedle applicator according to feature 1.

3. The fluid product container (C13; C24; C34) comprises a movable or deformable wall (C14), the wall (C14) being moved along or across the longitudinal axis X in response to the operation of the actuation members (I11; I21; I31). A microneedle applicator according to feature 1 or 2.

4. It has a general pen shape, suitable for holding between the thumb and middle finger while operating the operating members (I11; I21; I31) with the index finger. A microneedle applicator according to any one of claims 1 to 3.

5. The cartridge modules (C1; C2; C3) are removably connected to the intermediate modules (I1; I2; I3) by a coupling that combines axial movement, such as screwing or inserting, with rotational movement. A microneedle applicator according to any one of claims 1 to 4.

6. The operating member (I11) is equipped with a lateral push button as the receiving part that moves the operating rod (I12) in the axial direction, and the operating rod (I12) acts progressively on the fluid product container (C13) to continuously deliver the fluid product volume to the fluid product outlet (C110). A microneedle applicator according to any one of claims 1 to 5.

7. The actuating rod (I12) can move axially from its starting position to several consecutive forward positions against the return spring (I124), during which time it is prevented from returning backward by the catch device (I13) and locked in a predetermined position. The microneedle applicator according to feature 6.

8. The catch device (I13) is provided with disengagement means (I14; I14'; I14'') that enable the catch device (I13) to release the operating rod (I12), and upon this release, the operating rod (I12) elastically returns to the starting position. The microneedle applicator according to feature 7.

9. The cartridge module (C2; C3) comprises a rotating cylinder (C23; C33) that supports several fluid product containers (C24; C34), and the rotating cylinder can move these fluid product containers to a position where they are emptied in sequence. The intermediate modules (I2; I3) are equipped with actuators (I21; I31) that act on a fluid product container located in a position to be emptied, sending its contents to the fluid product outlets (C210; C310). A microneedle applicator according to feature 1 or 2.

10. The actuating member (I21) moves the actuating rod (I22) axially against the return spring (I224) from the starting position to the extended position corresponding to the position where the fluid product container (C24) is maximally empty. The microneedle applicator according to feature 9.

11. The operating member (I31) acts directly on the fluid product container (C34) through the lateral window (C333) of the rotating cylinder (C33). The microneedle applicator according to feature 10.

12. The intermediate module (I3) includes an actuation means (I34) for rotating the rotating cylinder (C33) of the cartridge module (C3). The microneedle applicator according to feature 11.

13. The coating surface (C31) of the cartridge module (C3) is locked to rotate by the intermediate module (I3), and each fluid product container (C34) is provided with a removable closing member (C341) that is removed by an opening member (C301) integrated with the coating surface (C31) before the fluid product container (C34) reaches the emptying position. A microneedle applicator according to feature 11 or 12.

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