Fluid dispensing device

Abstract

To provide a fluid dispensing device that protects the user from the risk of overdose. [Solution] A fluid discharge device having a discharge means 3 for discharging fluid contained in a reservoir 2, an inner body 10 accommodating the discharge means 3, and an actuator 20 attached to the inner body 10 so as to be displaceable between a rest position and an actuated position, wherein when the actuator 20 is displaced from the rest position to the actuated position, the discharge means 3 discharges one dose of fluid. The fluid discharge device also comprises a lock ring 40 rotatably attached to the inner body 10 between a locked position and an released position, a spring 60 which urges the lock ring 40 towards the locked position, and a gear 50 which is rotationally driven by a motor 80 and displaces the lock ring 40 from the locked position to the released position. In the locked position, the lock ring 40 prevents the actuator 20 from displacing axially, and in the released position, allows the actuator 20 to displace axially to the actuated position.

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to fluid ejection devices. [Background technology]

[0002] Today, certain situations may require the administration of powerful and potentially lethal drugs. This is especially true for people seeking palliative care for certain illnesses or at the end of life. Handling such substances requires extreme caution and highly secure administration equipment to avoid the risk of overdose that can occur if several doses are administered in rapid succession.

[0003] Document US5228586 describes a dispenser as set out in the preamble of claim 1. Documents EP0114617 and US2015 / 320948 describe other prior art devices. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] U.S. Patent No. 5,228,586 [Patent Document 2] European Patent Application Publication No. 0114617 [Patent Document 3] US Patent Application Publication No. 2015 / 320948 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention aims to provide a fluid ejection device that does not suffer from the above-mentioned drawbacks.

[0006] The present invention aims to provide a fluid dispensing device that is safe and protective for the user, in particular to avoid the risk of overdose.

[0007] It is another object of the present invention to provide a fluid ejection device that is blocked for a predetermined time between two successive actuations.

[0008] It is another object of the present invention to provide a fluid ejection device that is robust and reliable in use.

[0009] Another object of the present invention is to provide a fluid ejection device that is simple and inexpensive to manufacture and assemble. [Means for solving the problem]

[0010] To this end, the present invention provides a fluid ejection device comprising: a fluid dispenser having a reservoir containing a fluid and a dispensing means such as a pump or a valve attached to the reservoir; an inner body having a hollow cylinder that houses the dispenser; an actuator having a discharge orifice mounted on the inner body so as to be axially displaceable between a rest position and an actuated position, wherein axial displacement of the actuator from the rest position to the actuated position activates the discharge means to discharge a dose of fluid through the discharge orifice; -motor, -Electronic control module, a gear connected to said motor and driven in rotation by said motor; and a locking ring rotatably mounted on the inner body between a locked position and an unlocked position, a spring biasing the locking ring towards the locked position, the locking ring being displaceable from the locked position to the unlocked position by the gear, the locking ring cooperating with the actuator in the locked position to prevent axial displacement of the actuator, and in the unlocked position cooperating with the actuator to allow axial displacement of the actuator to the actuated position.

[0011] Advantageously, the device comprises an outer body fixed to said inner body and housing said motor and said electronic control module.

[0012] Advantageously, the device comprises a control button for initiating the operation of said motor.

[0013] Advantageously, said actuator includes at least one axial post and said locking ring includes at least one radial projection.

[0014] Advantageously, in the locked position of the locking ring, the at least one radial protrusion abuts the at least one axial support post to prevent axial displacement of the actuator towards the actuated position, and in the released position of the locking ring, the at least one radial protrusion is angularly offset from the at least one axial support post to allow axial displacement of the actuator towards the actuated position.

[0015] Advantageously, the device comprises four radial projections and four axial posts, each radial projection cooperating with a respective axial post to prevent axial movement of the actuator when the locking ring is in the locked position.

[0016] Advantageously, said locking ring comprises an axially flexible lug with axially upwardly projecting teeth.

[0017] Advantageously, said inner body, or an element integral with said inner body, such as a cover, has an internal shape comprising a first window and a second window separated from said first window by a radial strut.

[0018] Advantageously, said actuator comprises an axial finger extending axially downwards.

[0019] Advantageously, in the locked position of the locking ring, the tooth is located in the first window, and when the locking ring is displaced towards the released position, the flexible knob is deformed axially, allowing the tooth to pass through the second window behind the radial support, which then cooperates with the tooth to prevent the locking ring from returning to the locked position under the action of the spring.

[0020] Advantageously, during axial displacement of the actuator from the rest position to the actuated position, the axial fingers cooperate with the teeth by pressing the teeth axially downwards, causing the teeth to disengage from the radial posts, thereby allowing the locking ring to return to the locked position.

[0021] Advantageously, during displacement of the actuator from the rest position, the actuator fixes the locking ring in an intermediate position between the release position and the lock position. Advantageously, at the end of actuation, when the actuator returns to its rest position, the locking ring automatically returns to its locked position under the action of a spring.

[0022] Advantageously, the electronic control module comprises delay means for preventing the locking ring from moving from the locked position to the unlocked position for a predetermined period of time after each actuation of the dispenser.

[0023] Advantageously, said delay means locks the control buttons of the device and / or said motor.

[0024] These and other features and advantages of the invention will become more apparent during the course of the following detailed description, given by way of non-limiting example with reference to the accompanying drawings, in which: FIG. [Effects of the Invention]

[0025] In this way, it is possible to provide a fluid ejection device that does not suffer from the drawbacks mentioned above. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is an exploded perspective view of a dispensing device in accordance with an advantageous embodiment. [Figure 2] FIG. 2 is an exploded perspective view showing the assembly of the fluid dispensing dispenser within the device. [Figure 3] FIG. 3 is a side perspective view of the device of FIG. 1 illustrating steps for unlocking the device. [Figure 4] FIG. 4 is a view similar to FIG. 3 illustrating the steps of operating a fluid dispensing dispenser. [Figure 5] 5 is a perspective view of a locking ring in accordance with an advantageous embodiment. [Figure 6] 6 is a detailed perspective view of a portion of the lock ring of FIG. 5. FIG. [Figure 7] FIG. 7 is a view similar to FIG. 5 but from a different angle. [Figure 8] FIG. 8 is a perspective view of the actuator as seen from below. [Figure 9] 9 is a perspective view of a cover in accordance with an advantageous embodiment. [Figure 10] 10 is a perspective view of a gear in accordance with an advantageous embodiment. [Figure 11] FIG. 11 is a schematic perspective view showing the axial displacement of the actuator during operation. [Figure 12] FIG. 12 is a view similar to FIG. 11 showing the rotational displacement of the locking ring during unlocking. [Figure 13] FIG. 13 is a cutaway perspective view showing the locking ring biased toward the locked position. [Figure 14] FIG. 14 is a cross-sectional view showing the cooperation of the lock ring and the gear. [Figure 15] FIG. 15 is a cutaway perspective view showing the actuator, lock ring, and gear in the locked position. [Figure 16] FIG. 16 is a cutaway perspective view showing the actuator, lock ring, and gear in the unlocked position. [Figure 17] FIG. 17 is a cutaway perspective view showing the locking ring in the locked position. [Figure 18] FIG. 18 is a cutaway perspective view showing the locking ring in the unlocked position. [Figure 19] FIG. 19 is a cutaway perspective view showing details of the flexible tabs of the locking ring in the locked position. [Figure 20] FIG. 20 is a cutaway perspective view showing the cooperation of the lock ring and gear during the unlocking cycle. [Figure 21] FIG. 21 is a cutaway perspective view showing the cooperation of the lock ring and gears during the unlocking cycle. [Figure 22] FIG. 22 is a cutaway perspective view showing details of the flexible tab during the actuation cycle of the device. [Figure 23] FIG. 23 is a cutaway perspective view showing details of the flexible tab during the actuation cycle of the device. [Figure 24] FIG. 24 is a cutaway perspective view showing details of the flexible tab during the actuation cycle of the device. [Figure 25] FIG. 25 is a cutaway perspective view showing details of the flexible tab during the actuation cycle of the device. [Figure 26] FIG. 26 is a cutaway perspective view showing details of the flexible tab during the actuation cycle of the device. [Figure 27] FIG. 27 is a horizontal cross-sectional view showing the locking ring in the unlocked position during operation of the device. [Figure 28] FIG. 28 is a horizontal cross-sectional view showing the locking ring in an intermediate position during operation of the device. [Figure 29] FIG. 29 is a vertical cross-sectional view of the actuator before it returns to its rest position. [Figure 30] FIG. 30 is a cutaway perspective view showing the locking ring returning to its locked position at the end of actuation as the actuator returns to its rest position. [Figure 31] FIG. 31 is a cutaway perspective view showing the locking ring returning to its locked position at the end of actuation as the actuator returns to its rest position. DETAILED DESCRIPTION OF THE INVENTION

[0027] The terms "axial," "radial," "horizontal," and "vertical" refer to the central longitudinal axis of the device. The terms "top," "bottom," "upper," and "lower" refer to the upright position of the device as shown in Figures 3 and 4.

[0028] The main subject of the present invention is a device for allowing and prohibiting the ejection of a dose by locking and unlocking the actuation of an actuator that enables actuation of a fluid ejection device.

[0029] The fluid dispensing device shown in the drawings advantageously comprises a fluid dispenser 1 of standard type. This dispenser 1 comprises a reservoir 2 containing a fluid and dispensing means 3, such as a pump or valve, part of which can be displaced axially relative to the reservoir 2. The dispensing means 3 is fixed to the reservoir 2 by a fixing ring 4. The dispensing means 3 is actuated when an actuator is displaced axially downwards relative to the reservoir 2. Generally, a dispensing pump is used when the reservoir 2 does not contain propellant gas, and a metering valve is used when the reservoir 2 contains gas. These two types of dispensing means are well known to those skilled in the art and will not be described in detail below as they are not directly relevant to the present invention.

[0030] The fluid dispensing device also comprises an inner body 10 that receives the dispenser 1 and an outer body 120 secured to the inner body 10 and containing an electronic control module 90 .

[0031] The inner body 10 comprises a hollow cylinder 11 axially open at the bottom, with coupling means advantageously in the form of a screw thread 12 provided on the outer surface of the lower opening. The hollow cylinder 11 is intended to receive the reservoir 2 of the dispenser 1. To secure the dispenser 1 to the inner body 10, a cap 5 is provided. This cap 5 comprises complementary coupling means, advantageously in the form of an internal thread 6, adapted to cooperate with the coupling means of the inner body 10. Thus, to assemble the dispenser 1 in the device, the reservoir 2 is inserted inside the hollow cylinder 11 of the inner body 10. The cap 5 is then screwed onto said inner body 10. This assembly method is shown in Figure 2. This mode of operation means that an empty reservoir in the dispenser 1 can be simply replaced with a full one. The device, and in particular the electronic control module 90, can be reused instead of being discarded.

[0032] At the top, the inner body 10 comprises a plate 13 and a hollow axial extension 14 extending axially upwards from said plate 13. This may be integrally moulded with the inner body 10 or manufactured separately and then attached to said inner body 10 in any suitable way. When the dispenser 1 is placed in the inner body 10, at least a part of the discharge means 3 traverses said hollow axial extension 14.

[0033] The outer body 120 is hollow and can have any external shape. In the illustrated example, the outer body 120 is generally rectangular in shape, corresponding in part to the shape of the plate 13 of the inner body 10. The outer body 120 is secured to the inner body 10 by any suitable method, for example by snaps. Advantageously, the outer body 120 comprises one or more windows 121, for example the windows shown in Figures 1 to 4, through which the screen 91 of the electronic control module 90 can be viewed. This screen may display information such as instructions for use, battery charging information, etc.

[0034] The outer body 120 also has an opening 122 for receiving the control button 85. Alternatively, the control button may be replaced by a control zone on another display visible on the screen 91 or in a separate window. This control zone may incorporate fingerprint detection means to allow only authorized persons or people to activate the device, thus preventing accidental activation by, for example, children. Other means of recognition are also contemplated, such as facial recognition. The control button or control zone may also be replaced by other means, such as voice commands, remote unlocking by a third party (such as a doctor), commands managed by a timer or software in the electronic control module, etc.

[0035] A cover 30 is provided which is fixed onto the plate 13 of the inner body 10 and which comprises a hollow cylinder 31 and a radial flange 32. The internal shape 35 of the hollow cylinder 31 consists of a first window 350 and a second window 351, the second window being separated from the first window 350 by a radial strut 352. Alternatively, the profile 35 may be provided on the inner body 10.

[0036] The actuator 20 has a discharge orifice 21 and is mounted in the hollow cylinder 31 of the cover 30. The actuator 20 is axially displaceable relative to the inner body 10 between a rest position and an actuated position, in which the actuator 20 moves axially downwards relative to the inner body 10. Advantageously, the actuator has a nosepiece 22, which terminates at its upper end in the discharge orifice 21 and has an axial skirt 23 below it. The axial skirt 23 has a radial bearing surface 230 that a user can press down on to actuate the dispenser 1. At least one axial tab 24 extends axially downwards from a radially lower edge 231 of the axial skirt 23 and secures the actuator 20 in the hollow cylinder 31 of the cover 30, for example by snap-fitting. In the example of FIG. 8, two diametrically opposed axial tabs 24 are provided. An axial finger 27 also extends axially downward from the radially lower edge 231 of the axial skirt 23, the function of which will be described below. In the example of Figure 8, the axial finger 27 is positioned 90° from each of the two diametrically opposed axial tabs 24.

[0037] Internally, the actuator 20 comprises a hollow tube 25 which cooperates with the discharge means 3 and opens into a discharge orifice 21. The hollow tube 25 preferably has a spray profile provided immediately upstream of said discharge orifice to generate a spray. At least one axial strut 26 is provided below the radial bearing surface 230. In the example of Figure 8, there are four axial struts 26 (three of which are visible) distributed around the periphery. The function of these axial struts will be explained below.

[0038] The device further comprises a locking ring 40 , a gear 50 cooperating with said locking ring 40 , a spring 60 for said locking ring 40 , and a motor wheel 70 associated with a motor 80 , said motor wheel 70 cooperating with said gear 50 .

[0039] The locking ring 40 , gear 50 , spring 60 and motor wheel 70 are positioned on the plate 13 of the inner body 10 and are held in place by the cover 30 .

[0040] The locking ring 40 is rotatably mounted around said axial extension 14 of the inner body 10 between a locked position and an unlocked position. A spring 60 biases the locking ring towards the locked position. It is advantageously fixed on the one hand to a stud 46 of the locking ring 40 and on the other hand to a second stud 36 provided on the plate 13 of the inner body 10, as shown in Figures 13 and 15. The locking ring 40 cooperates with the actuator 20 to selectively lock or allow axial movement of the actuator 20.

[0041] The lock ring 40 has a hollow sleeve 41. The hollow sleeve 41 has an axially flexible tab 42 at its lower axial edge 411. The tab 42 extends radially outside the hollow sleeve 41, coaxial with the hollow sleeve 41. The flexible tab 42 has teeth 420 and openings 421. The teeth 420 protrude axially upward, and the openings 421 are located behind the teeth 420. When the lock ring 40 is in the locked position, the teeth 420 are positioned in the first windows 350 of the cover 30, as shown in FIGS. 17, 19, and 22. When the lock ring 40 is displaced to the unlocked position, the axially flexible tab 42 is deformed axially downward, as shown by the arrow in FIG. 19, causing the teeth 420 to pass under the radial support posts 352 of the cover 30 and move into the second windows 351, as shown in FIG. 18. Advantageously, during an unlocking cycle, as motor 80 rotation is transmitted through gear 50, angular overtravel of lock ring 40 creates an offset between teeth 420 and radial posts 352, as shown in FIG. 23 . This ensures that teeth 420 snap behind radial posts 352 when motor 80 no longer applies torque, even though second set of teeth 52 of gear 50 no longer meshes with teeth 45 of lock ring 40. This ensures reliable operation despite manufacturing tolerances of various components. Because spring 60 biases lock ring 40 toward the locked position, as soon as lock ring 40 is in the unlocked position, spring 60 attempts to return lock ring 40 to the locked position, but as shown in FIG. 24 , teeth 420 of flexible tab 42 abut against radial posts 352, preventing lock ring 40 from moving to the locked position.

[0042] The locking ring 40 has at least one radial protrusion 43 extending radially outward from the hollow sleeve 41. In the example shown, there are four radial protrusions 43 distributed around the circumference of the hollow sleeve 41. In the locked position, these radial protrusions 43 cooperate with the axial posts 26 of the actuator 20 to prevent axial movement of the actuator toward the actuated position. Conversely, in the released position, the radial protrusions 43 are each angularly offset from the axial posts 26, allowing axial displacement of the actuator 20 toward the actuated position. In the embodiment shown in the drawings, as shown in FIG. 15, the four radial protrusions 43 cooperate with the four axial posts 26 to make the device particularly robust and prevent unauthorized actuation of the device.

[0043] Opposite the flexible knob 42, the locking ring 40 comprises a flat 44 which supports teeth 45 which cooperate with a gear 50 which moves the locking ring 40 towards the release position. The flat 44 also advantageously supports a stud 46 which is fixed to a spring 60. Advantageously, the locking ring 40 comprises detection means which cooperate with the electronic control module 90 to indicate its position. In the example shown, these detection means comprise an axial extension 47 which extends axially downwards from said flat 44.

[0044] Gear 50 has a first set of teeth 51 consisting of a plurality of teeth distributed around the entire circumference of gear 50. Gear 50 has a second set of teeth 52 provided axially above first set of teeth 51. Second set of teeth 52 is provided on only a portion of the circumference of gear 50. In the example shown in FIG. 10, second set of teeth 52 consists of three teeth. Second set of teeth 52 cooperate with teeth 45 of lock ring 40 to rotate lock ring 40 from the locked position to the unlocked position, as shown in FIGS. 20 and 21.

[0045] The motor wheel 70 includes a set of teeth 71 that cooperates with the first set of teeth 51 of the gear 50. Thus, when the motor 80 rotates the motor wheel 70 in one rotational direction, the motor wheel rotates the gear 50, driving the lock ring 40 from the locked position to the unlocked position.

[0046] An electronic control module 90 is fixed to a support 81, which is fixed to the inner body 10, and the assembly is housed within the outer body 120. The electronic control module 90 controls a motor 80, also mounted on the support 81, which cooperates with a motor wheel 70 to rotate the motor wheel 70.

[0047] The motor 80 may be a 3V DC gear motor suitable for rotating a motor shaft connected to the motor wheel 70. The motor may be powered in any suitable manner, for example, by a rechargeable or non-rechargeable battery or accumulator. Preferably, when the motor 80 is controlled, the motor wheel 70 rotates to rotate the gear 50 one full rotation. In this way, the lock ring 40 first rotates from the locked position toward the unlocked position, and then the second set of teeth 52 of the gear 50 disengages from the teeth 45 of the lock ring 40. Thus, when the lock ring 40 is in the unlocked position, it is no longer connected to the motor 80.

[0048] The electronic control module 90 comprises suitable electronic elements, in particular a microprocessor, for operating the apparatus, in particular the motor 80 and the screen 91. Advantageously, the electronic control module 90 comprises a switch (not shown) for detecting the displacement and / or position of the locking ring 40, in particular its axial extension 47. It is thus possible to detect the various stages of operation, in particular the return of the locking ring to its locked position after actuation of the dispenser 1 and the dispensing of a dose of fluid. This information may be used to inhibit operation of the device for a predetermined time.

[0049] Therefore, the electronic control module 90 may have a delay means that allows new activations only after a predetermined delay period has expired. The delay means may, in particular, include the microprocessor's internal clock. Optionally, a real-time clock component may be added. This temporary block preferably acts on the control of the motor 80, preventing it from rotating and moving the locking ring 40 from the locked position to the unlocked position. Alternatively, the control button 85 may be deactivated or blocked for a predetermined period of time. Advantageously, only authorized personnel, such as medical personnel, can change the delay time by accessing the electronic control module or via the screen 91. Advantageously, the screen 91 indicates the time remaining until the next dose can and / or must be taken. Optionally, an audio and / or visual signal may be provided if the user presses a control button to unlock the device.

[0050] The operation of the device shown in the drawings will now be explained in more detail.

[0051] In a normal operating cycle, the user picks up the device in the rest position shown in Figure 3. In this position, the actuator 20 cannot be displaced axially downwards as it is secured by the locking ring 40 in the locked position.

[0052] To activate the device, a user must first issue a command to electronic control module 90 to transition lock ring 40 from the locked position to the unlocked position. This is accomplished by pressing control button 85, in the illustrated example, as indicated by arrow F1 in FIG. 3. This rotates motor 80, and thus motor wheel 70, which rotates gear 50, and thus lock ring 40, from the locked position shown in FIGS. 15, 17, 19, and 22 to the unlocked position shown in FIGS. 16, 18, and 23. As lock ring 40 transitions, spring 60 is loaded, acting to return lock ring 40 to the locked position. However, because teeth 420 abut against radial posts 352 on cover 30, lock ring 40 is secured in the unlocked position, preventing the force of spring 60 from restraining lock ring 40 from returning to the locked position.

[0053] The user can then apply an axial actuation force to the actuator 20, displacing it axially downwards according to arrow F2 in FIG. 4 . This activates the discharge means 3, causing a dose of fluid to be discharged through the discharge orifice 21. In the released position, the second set of teeth 52 of the gear 50 is no longer connected to the teeth 45 of the locking ring 40, so that when the motor 80 is activated and the locking ring 40 is not connected to the motor 80, the gear 50 rotates one full rotation. In a variant, the gear 50 rotates by any angle, such as half a rotation, each time the motor 80 is activated. In this case, the number of teeth 45 of the locking ring 40 and the number of teeth of the second set of teeth 52 of the gear are set according to the angle of rotation of the gear 50.

[0054] From the start of actuation, the actuator 20 moves axially downward relative to the locking ring 40, with the axial fingers 27 of the actuator 20 cooperating with the teeth 420 of the flexible knob 42. As shown in FIG. 25 , the axial fingers 27 press the teeth 420 axially downward, disengaging them from the radial posts 352. When the radial posts 352 unblock the teeth 420, the springs 60 bias the locking ring 40 toward the locked position. However, the locking ring 40 cannot return to the locked position because the radial projections 43 of the locking ring 40 remain blocked against the radial posts 26 of the actuator 20 in the intermediate position shown in FIG. 28 . Only when the actuator 20 returns to its rest position can the locking ring 40 automatically return to the locked position under the action of the springs 60. Preferably, at the beginning of the actuator 20's actuation stroke, the teeth 420 disengage from the radial posts 352, thereby ensuring locking even during an incomplete actuation stroke. Therefore, multiple partial doses cannot be dispensed consecutively. After the teeth 420 disengage, when the locking ring 40 is in the intermediate position of FIG. 28, the axial fingers 27 can pass through the openings 421 in the flexible tabs 42, as shown in FIG. 26, allowing the actuator 20 to continue its full actuation stroke to the actuated position.

[0055] After actuation, when the user releases the pressure on the actuator 20, the discharge means 3, and in particular the return spring (not shown) of the discharge means 3, causes the actuator 20 to return to its rest position.

[0056] The device then returns to the rest position and further actuation is only possible after the expiration of a block period preset by the electronic control module 90 .

[0057] While the present invention has been described above with reference to preferred embodiments, it will be apparent to those skilled in the art that various modifications may be made thereto without departing from the scope of the invention as defined by the appended claims. [Industrial Applicability]

[0058] Fluid dispensing devices according to the present disclosure are useful as safety and user protection devices to avoid the risk of overdose. [Explanation of symbols]

[0059] 1...Fluid dispenser 2...Reservoir 3……Discharge means 4...Fixing ring 5...Cap 6... Female thread 10...Inner body 11...Hollow cylinder 12...Thread 13...Plate 14...Axial extension part 20...Actuator 21...Discharge orifice 22...Nosepiece 23...Axial skirt 24...Axial tab 25……Hollow tube 26……Axial strut 27...Axial finger 30...Cover 31...Hollow cylinder 32...Radial flange 35……Internal shape 36...Second Stud 40...Lock ring 41...Hollow sleeve 42... knob 43...Radial protrusion 44……Flat area 45...teeth 46...Stud 47...Axial extension part 50... Gears 51...First set of teeth 52...Second set of teeth 60...Spring 70...Motor wheel 71...set of teeth 80...Motor 81...Support 85...Control button 90...Electronic control module 91...screen 120...Outer body 121...Window 122...Opening 230...Radial bearing surface 231…Radial lower edge 350...First window 351...Second window 352…Radial strut 411…Axis lower edge 420...teeth 421…Aperture

Claims

1. A fluid dispenser (1) having a reservoir (2) containing a fluid and a pump or valve dispensing means (3) attached to the reservoir (2); an inner body (10) having a hollow cylinder (11) that houses the dispenser (1); an actuator (20) having a discharge orifice (21) and mounted on the inner body (10) so as to be axially displaceable between a rest position and an actuated position; A fluid discharge device, wherein when the actuator (20) is axially displaced from a rest position to an actuated position, the discharge means (3) is actuated to discharge a dose of fluid through the discharge orifice (21), a motor (80); an electronic control module (90); a gear (50) connected to the motor (80) and rotated by the motor (80); a locking ring (40) rotatably mounted to the inner body (10) between a locked position and an unlocked position; a spring (60) that biases the lock ring (40) toward the locked position; The lock ring (40) is displaced from a lock position to an unlock position by a gear (50), the actuator (20) includes at least one axial strut (26); the locking ring (40) includes radial projections (43) corresponding to each of the axial struts (26); The lock ring (40) In the locked position, the radial projections (43) abut the corresponding axial posts (26) to prevent axial displacement of the actuator (20); In the released position, the release of the abutment between the radial projections (43) and the corresponding axial posts (26) allows the actuator (20) to be axially displaced to an actuated position.

2. The fluid ejection device of claim 1 , comprising an outer body (120) secured to the inner body (10) and housing the motor (80) and the electronic control module (90).

3. The fluid ejection device of claim 1 or 2, comprising a control button (85) for initiating operation of the motor (80).

4. In the release position of the lock ring (40), each of the radial protrusions (43) is angularly offset from the corresponding axial support (26), so that The fluid ejection device of any one of claims 1 to 3, wherein the actuator (20) is capable of being axially displaced towards an actuated position.

5. 5. The fluid ejection device of claim 4, further comprising four radial projections (43) and four axial support posts (26), each of which abuts against a corresponding axial support post (26) to prevent axial displacement of the actuator (20) when the lock ring (40) is in the locked position.

6. The fluid ejection device of any one of claims 1 to 5, wherein the locking ring (40) comprises an axially flexible tab (42) with an axially upwardly projecting tooth (420).

7. 7. The fluid ejection device of claim 6, wherein the inner body (10), or an element integral with the inner body (10), such as a cover (30), has an internal shape (35) including a first window (350) and a second window (351) separated from the first window (350) by radial struts (352).

8. The fluid ejection device of claim 7, wherein the actuator (20) comprises an axial finger (27) extending axially downward.

9. 9. The fluid ejection device of claim 8, wherein in the locked position of the locking ring (40), the teeth (420) are disposed within the first window (350), and when the locking ring (40) is displaced toward the unlocked position, the flexible tab (42) is axially deformed, allowing the teeth (420) to pass through the second window (351) behind the radial struts (352), and then the teeth (420) abut against the radial struts (352) to block them from returning to the first window (350), thereby preventing the locking ring (40) from returning to the locked position by the action of the spring (60).

10. 10. The fluid ejection device of claim 9, wherein, during axial displacement of the actuator (20) from the rest position to the actuated position, the axial fingers (27) press the teeth (420) axially downward, thereby disengaging the teeth (420) from the radial struts (352), thereby unblocking the teeth (420) from the radial struts (352), thereby allowing the locking ring (40) to return to the locked position.

11. The fluid ejection device of claim 10, wherein the actuator (20) secures the locking ring (40) in an intermediate position between an unlocked position and a locked position while the actuator (20) is displaced from the rest position.

12. 12. The fluid ejection device of claim 1, wherein at the end of actuation, when the actuator (20) returns to its rest position, the locking ring (40) automatically returns to its locked position under the action of the spring (60).

13. 13. The fluid ejection device of claim 1, wherein the electronic control module (90) comprises a delay means for preventing the locking ring (40) from moving from the locked position to the unlocked position for a predetermined period of time after each actuation of the fluid dispenser (1).

14. The fluid ejection device of claim 13, wherein the delay means blocks at least one of a control button (85) of the device and the motor (80).

Images