PERISTALTIC GEAR-CHANGE MOTOR

Abstract

PERISTALTIC GEAR-CHANGE MOTOR Dispensing system, including a first shaft and a second shaft, a first gear transmission system disposed on the first shaft, the first gear transmission system including a first gear, a second gear, a first pump roller configured to dispense a first formula, and a second pump roller configured to dispense a second formula, a second gear transmission system disposed on the second shaft, the second gear transmission system including a third gear, a fourth gear, and a synchronizer configured to slide between the third and fourth gears, and a motor configured to rotate the first and second shafts, wherein the motor is configured to control both the first and second pump rollers. REC:tpf Figure for abstract: none

Description

Title of the invention: PERISTALTIC GEAR-CHANGE MOTOR SUMMARY

[0001] According to one aspect, the present disclosure relates to a distribution system, including a first shaft and a second shaft, a first gear transmission system disposed on the first shaft, the first gear transmission system including a first gear, a second gear, a first pump roller configured to dispense a first formula, and a second pump roller configured to dispense a second formula, a second gear transmission system disposed on the second shaft, the second gear transmission system including a third gear, a fourth gear, and a synchronizer configured to slide between the third gear and the fourth gear, and a motor configured to rotate the first shaft and the second shaft, wherein the motor is configured to control both the first pump roller and the second pump roller.

[0002] In some embodiments, the first gear is configured to mesh with the third gear. In some embodiments, the second gear is configured to mesh with the fourth gear.

[0003] In some embodiments, the reduction ratio between the first gear and the third gear is 1:1. In some embodiments, the reduction ratio between the second gear and the fourth gear is 2:1.

[0004] In some embodiments, the first gear is fixed. In some embodiments, the second gear is fixed. In some embodiments, the third gear rotates freely. In some embodiments, the fourth gear rotates freely.

[0005] In some embodiments, the first formula differs from the second formula. In some embodiments, a gear ratio of the first and third gears controls the flow rate of the first and second formulas. In some embodiments, a gear ratio of the first and third gears controls the mixing ratio between the first and second formulas. In some embodiments, a gear ratio of the second and fourth gears controls the flow rate of the first and second formulas. In some embodiments, a gear ratio of the second and fourth gears controls the flow rate of the first and second formulas. gear controls a mixing ratio of the first formula and the second formula.

[0006] In some embodiments, the synchronizer slides laterally along fixed shaft splines of the second shaft. In some embodiments, the third gear includes a third gear attachment configured to removably couple to the synchronizer.

[0007] In some embodiments, the fourth gear includes a fourth gear attachment configured to removably couple to the synchronizer. In some embodiments, the second gear transmission system further includes a fixed secondary gear.

[0008] In some embodiments, the first gear transmission system further includes a freely rotating secondary gear configured to mesh with the fixed secondary gear.

[0009] In another aspect, the present disclosure relates to a hair care device, including the distributor of this disclosure.

[0010] The purpose of this summary is to present a selection of concepts in a simplified form, which are described in greater detail below in the detailed description. This summary is not intended to identify key features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter. Description of the drawings

[0011] [Fig-1] The [Fig. 1] is an example of a device, in accordance with the present technology;

[0012] [Fig.2] Fig.2 is an internal view of an example device, in accordance with the present technology;

[0013] [Fig.3] The [Fig.3] is an internal view of another example of a device, in accordance with the present technology;

[0014] [Fig. 4A] Fig. 4A is an example of a distribution system according to the present technology; and

[0015] [Fig.4B] The [Fig.4B] is a second example of a gear transmission system, in accordance with the present technology.

[0016] The preceding aspects and many related advantages of the present invention will be more readily appreciated as they are better understood with reference to the following detailed description, when taken in conjunction with the accompanying drawings. Detailed description

[0017] This disclosure relates to devices, distribution systems and methods for driving two or more pump rollers with a single motor. In In some embodiments, a pump roller controlled by a mechanical gear switch with specified gear ratios is used to alternate between mixing ratios. In some embodiments, the gear mechanism allows a second pump roller to be controlled by a single motor. In some embodiments, the gears are changed using a sliding synchronizer powered by a key-operated locking mechanism.

[0018] In some embodiments, the distribution systems include a single motor, two or more pump rollers, where each pump roller is configured to dispense one formula, and two gear transmission systems arranged on a first shaft and a second shaft. In some embodiments, a first gear transmission system includes a first gear and a second gear, configured to selectively mesh with a third gear and a fourth gear of a second gear transmission system. In some embodiments, the second gear transmission system further includes a synchronizer configured to switch between the third and fourth gears. The gear sizes can control a mixing ratio between a first formula and a second formula.

[0019] This allows a dispensing device or system equipped with separately controlled pump rollers to adjust the flow rate of different formulations. In some embodiments, the gear ratios allow a desired product mixing ratio to be obtained from two channels. Furthermore, the sliding gear synchronizer can be configured to alternate between gears. Levers or automated mechanisms can be used to alternate between the gears.

[0020] Figure 1 is an example of a device 100 according to the present technology. It illustrates a representative formulation delivery device 100, and its components, according to an embodiment of this disclosure. In some embodiments, the device 100 may be referred to as a "hair care device" or a "formulation delivery device." The formulation delivery device 100 is configured to receive a formulation cartridge type 102 (including a cleaning cartridge of the same type). An embodiment of a formulation cartridge of formulation cartridge type 102 is described in detail below with reference to Figure 3; the formulation cartridge 102 shown in Figure 1 is understood to have the same characteristics as those described herein.Some embodiments of the formulation delivery device 100 include the formulation cartridge 102 and / or an optional traction adapter 104.

[0021] The formulation delivery device 100 includes a reusable handle 106 made of ABS plastic or a similar rigid polymer or other The material, and, in some embodiments, is an assembly formed by a plurality of shells configured to be joined together using fasteners such as snap fasteners, screws, or the like. The reusable handle 106 has a hollow, elongated gripping portion enclosing a cartridge cavity that is shaped and sized to receive the formulation cartridge type 102. In some embodiments, the cavity includes gripping features that facilitate the correct insertion of the formulation cartridge type 102. For example, some embodiments include a cartridge interface 108 disposed in the opening and having a flat receiving surface that interfaces with a corresponding receiving surface of the formulation cartridge 102 when the latter is correctly inserted into the opening.

[0022] A control device (not shown in [Fig. 1]) includes logic configured to operate on a machine-readable, non-transient storage medium and includes modules that personalize the user experience, provide useful analytics, and enable e-commerce. In some embodiments, a corresponding application runs on a mobile device such as a smartphone, tablet, or similar device and interacts with a user (e.g., an end user or a salon technician) to provide actionable information through a plurality of modules. In some embodiments, the application communicates with the formulation delivery device 104 and a network, such as a mobile network, a cloud-based enterprise network, a local area network, or similar.

[0023] Together, the formulation cartridge 102, the formulation dispensing device 104, and the application provide an enhanced and personalized user experience. In some embodiments, the formulation dispensing device 104 is a connected electromechanical device that interacts with the user, with formulation cartridges 102, and optionally with the application to provide a personalized user experience.

[0024] Generally, the formulation delivery device 104 comprises a reusable handle 106 configured to receive the formulation cartridge type 102, as well as a formulation dispensing assembly and a control device, both being disposed within the reusable handle. The formulation dispensing assembly comprises at least one fluid conduit fluidically connected to a motorized pump and a reciprocating nozzle assembly, and is configured to draw the formulation and cleansing liquid from the formulation cartridge 110 and to dispense them via the reciprocating nozzle assembly onto a portion of the hair, scalp, or body of a user.

[0025] The control device is configured to switch between at least one cleaning routine and one formulation routine in response to one or more inputs indicative of the cleaning cartridge or formulation cartridge 102 inserted into the reusable handle 106.

[0026] In some embodiments, the formula dispensing device 104 further includes a cartridge interface 108 configured to accept the formula cartridge 102, a reciprocating nozzle assembly 114 configured to move a plurality of nozzles or spacing protrusions 116, a button 126 for actuating the formula dispensing device 104, visual indicators 128 (such as light-emitting diodes (LEDs)) indicating a status of the formula dispensing device 104, a cartridge cavity 124 configured to accept the formula cartridge 102, and an encryption chip 132.

[0027] Figure 2 is an internal view of an example of a device 200, according to the present technology. In some embodiments, the device 200 may be called a "hair care device" or a "formulation delivery device." In some embodiments, the device 200 includes a first roller pump (or "first peristaltic pump") 201A, a second roller pump (or "second peristaltic pump"), a first formula tube 202A, a second formula tube 202B, a mixing chamber 204 (which may include a mixer, such as a static mixer), a first motor 205A, a second motor 305B, and a plurality of dispensing nozzles 206.

[0028] During operation, the first tube 202A is configured to deliver a first formulation, while the second tube 202B delivers a second formulation. In some embodiments, the first roller pump 201A distributes the first formulation at a first flow rate to the mixing chamber 204 via the first tube 202A. Similarly, the second roller pump 201B can distribute the second formulation at a second flow rate to the mixing chamber 204 via the second tube 202B. The first roller pump 201A can be driven by a first motor 205A, while the second roller pump 201B can be driven by a second motor 205B. In some embodiments, the first roller pump 201A and the second roller pump 201B can modify the flow rate (i.e., the first flow rate and / or the second flow rate) of the first and second formulations.

[0029] Once in the mixing chamber 204, a mixer, such as a static mixer (not shown in [Fig. 2]), can mix the first formulation and the second formulation. In some embodiments, the first formulation and the second formulation are then distributed by the plurality of nozzles 206.

[0030] Figure 3 is an internal view of another example of device 200, according to the present technology. In some embodiments, device 200 may be called a "hair care device" or a "formulation delivery device". "In some embodiments, the device 200 includes a single motor 210. In such embodiments, the motor 205, the first pump 201A and the second pump 201B can be collectively referred to as a distribution system 210. In some embodiments, a single motor 205 drives both the first pump 201A and the second pump 20IB.

[0031] Figure 4A is an example of a distribution system 210 according to the present technology. In some embodiments, the distribution system 210 is integrated into a device (such as device 100 or device 200). In other embodiments, the distribution system 210 is separate from a device.

[0032] In some embodiments, the distribution system 210 includes a first shaft 310A and a second shaft 310B. In some embodiments, the first shaft 310A, the second shaft 310B, or a combination thereof may be driven by a motor 205. In some embodiments, the first shaft 310A and the second shaft 310B are driven by the same motor 210. In some embodiments, the first shaft 310A, the second shaft 310B, or a combination thereof may be driven to rotate, as indicated by the arrows in [Fig. 4A].

[0033] In some embodiments, the distribution system 210 further includes a first gear transmission system 302A disposed on the first shaft 301A. The first gear transmission system 302A may include a first gear 303A, a second gear 303B, a first pump roller 201A configured to dispense a first formula, and a second pump roller 201B configured to dispense a second formula. Although only two pump rollers 201A, 201B are shown, it should be understood that any number of pump rollers may be included in the first gear transmission system 302A. In some embodiments, the motor 205 is further configured to control both the first pump roller 201A and the second pump roller 201B.

[0034] In some embodiments, the distribution system 210 further includes a second gear transmission system 302B disposed on the second shaft 301B. The second gear transmission system 302B may include a third gear 304A, a fourth gear 304B and a synchronizer 305 configured to slide between the third gear 304A and the fourth gear 304B, as illustrated in more detail in [Fig.4B].

[0035] During operation, the first gear 303A is configured to mesh with the third gear 304A, as illustrated in detail in Figure 5A. In some embodiments, a reduction ratio between the first gear 303A and the third gear 304A determines a ratio of a mixture of the first and second formulas. Similarly, in some embodiments, the second gear 303B is configured to mesh with the fourth gear 304B, as illustrated in detail in Figure 5B. In some embodiments, a gear ratio between the second gear 303B and the fourth gear 304B determines a mixing ratio of the first and second formulas. For example, in some embodiments, the gear ratio between the first gear 303A and the third gear 304A modifies the flow rate of the first roller pump 201A, the second roller pump 201B, or both. Likewise, in some embodiments, the gear ratio between the second gear 303B and the fourth gear 304B modifies the flow rate of the first roller pump 201A, the second roller pump 201B, or both.

[0036] As used here, the term "gear ratio" refers to the ratio between the number of teeth in a gear (such as the first gear 303A and the second gear 303B) and in a gear that interfaces with it (such as the third gear 304A and the fourth gear 304B, respectively). In other words, the gear ratio corresponds to the number of revolutions that the third gear 304A or the fourth gear 304B makes while the first gear 303A or the second gear 303B makes only one revolution, respectively.

[0037] In some embodiments, the gear ratio between the first gear 303A and the third gear 304A is 1:1. In some embodiments, the gear ratio between the second gear 303B and the fourth gear 304B is 2:1. Those skilled in the art will recognize that the size of the gears (i.e., the first gear 303A, the second gear 303B, the third gear 304A, and the fourth gear 304B) can be modified to change the gear ratio, and thus the mixing ratio of the first and second formulations. In some embodiments, the mixing ratio can be based on a viscosity of the first and / or second formulation. In some embodiments, the mixing ratio can be based on an identity of the first and / or second formulation.For example, if the first formula was a hair color, and the second formula was a hair developer, a 1:1 ratio might be desired to achieve a shimmering color, and a 1:2 ratio might be desired to cover roots or mask grey hair.

[0038] In certain embodiments, the gear ratio of the first gear 303A and the third gear 304A controls a flow rate of the first formula and the second formula. In certain embodiments, the ratio of The reduction of the first gear 303A and the third gear 304A controls a mixing ratio between the first formula and the second formula.

[0039] In some embodiments, the gear ratio of the second gear 303B and the fourth gear 304B controls the flow rate of the first and second formulas. In some embodiments, the gear ratio of the second gear 303B and the fourth gear 304B controls the mixing ratio of the first and second formulas.

[0040] In some embodiments, the first gear 303A is fixed. As used here, a gear is "fixed" if it rotates with the shaft on which it is located. Therefore, in embodiments in which the first gear 303A is fixed, it rotates with the first shaft 301A. In some embodiments, the second gear 303B is fixed. In some embodiments, both the first gear 303A and the second gear 303B are fixed.

[0041] In some embodiments, the third gear 304A rotates freely. As used here, a gear "rotates freely" if it does not rotate with the shaft on which it is disposed, but can be set in rotation by a fixed gear meshing with it. Therefore, in embodiments in which the third gear 304A rotates freely, it can rotate independently of the second shaft 301B when meshed with the first fixed gear 303A. In some embodiments, the fourth gear 304B rotates freely. Therefore, in embodiments in which the fourth gear 304B rotates freely, it can rotate independently of the second shaft 301B when meshed with the third fixed gear 303B.

[0042] In some embodiments, the first formula differs from the second formula. In some embodiments, the first formula is a hair dye. In some embodiments, the second formula is a developer. In some embodiments, the first formula, the second formula, or both may be selected from a shampoo, conditioner, hair mask, moisturizing cream, cosmetics, hair chalk, hair pigment, or similar products.

[0043] In some embodiments, the second gear transmission system 302A further includes a fixed secondary gear 31 IB. In some embodiments, the fixed secondary gear 311B is fixed, but in other embodiments, it can rotate freely as described herein. In some embodiments, the first gear transmission system 302A further includes a freely rotating secondary gear 31 IA configured to mesh with the fixed secondary gear 31 IB.

[0044] During operation, the first gear 303A and the third gear 304A are coupled. When the first gear 303A and the third gear 303B are engaged, the synchronizer 305 can be meshed with the third gear 304A. A gear ratio between the first gear 303A and the third gear 304A controls the first roller pump 201A and / or the second roller pump 201B. The rotation of the first shaft 301A, the second shaft 301B, or both can be controlled by the motor 205, which drives the first roller pump 201A and the second roller pump 201B. In some embodiments, the gear ratio of the first gear 303A and the third gear 304A is 1:1. In some embodiments, a user or device (such as devices 100, 200) can instruct the distribution system 210 to change the mixing ratio and / or the gear ratio.Synchronizer 305 can slide between the third gear 304A and the fourth gear 304B to disengage from the third gear 304A and engage with the fourth gear 304B, as illustrated in detail in Figure 5B. When synchronizer 305 engages with the fourth gear 304B, which is engaged with the second gear 303B, the gear ratio between the second gear 303B and the fourth gear 304B controls the first roller pump 201A and / or the second roller pump 201B. The rotation of the first shaft 301A, the second shaft 301B, or both can be controlled by motor 205, which drives the first roller pump 201A and the second roller pump 201B. In some embodiments, the gear ratio of the second gear 303B and the fourth gear 304B is 1:2.Thus, the distribution device or system 210, independently of a device, can switch between different gear ratios, and thus different mixture ratios, of the first formula and the second formula, with a single engine 205.

[0045] It should be understood that the distance between the first gear 303A and the third gear 304A and the distance between the third gear 303B and the fourth gear 304B are intended to clarify the illustration. In some embodiments, the first gear 303A and the third gear 304A are meshed, i.e., the teeth of the first gear 303A and the teeth of the third gear 304A interlock, so that the first gear 303A and the third gear 304A are coupled. Furthermore, in some embodiments, the second gear 303B and the fourth gear 304B are meshed, i.e. the teeth of the second gear 303B and the teeth of the fourth gear 304B interlock, so that the second gear 303A and the fourth gear 304B are coupled.

[0046] Figure 4B is a second example of a gear transmission system 302B, in accordance with the present technology. In some embodiments, the third gear 304A includes a third gear attachment 307 configured to removably couple to the synchronizer 305. In some embodiments, the third gear attachment 307 is a key-locking attachment. In some embodiments, the third gear attachment 307 is a smaller internal gear. In some embodiments, the fourth gear 304B includes a fourth gear attachment 308 configured to removably couple to the synchronizer 305. In some embodiments, the fourth gear attachment 308 is a key-locking attachment. In some embodiments, the fourth gear attachment 308 is a smaller internal gear.

[0047] In some embodiments, the synchronizer 305 slides laterally along the fixed shaft splines 306A, 306B, 306C... 306N of the second shaft 301B. The fixed shaft splines 306A, 306B, 306C... 306N can transfer torque to the synchronizer 305. During operation, the synchronizer 305 is configured to adjust the speed of the second shaft 301B to match the gear to be meshed (i.e., the third gear 304A or the fourth gear 304B) so as to allow smooth gear changes between the third gear 304A and the fourth gear 304B.

[0048] This application may refer to quantities and numbers. Unless otherwise specified, these quantities and numbers are not to be considered restrictive, but rather representative of the possible quantities or numbers associated with this application. Similarly, in this regard, this application may use the term "plurality" to refer to a quantity or number. In this regard, the term "plurality" is understood to mean any number greater than one, for example, two, three, four, five, etc. The terms "about," "approximately," "near," etc., mean plus or minus 5% of the stated value. For the purposes of this disclosure, the expression "at least one of A, B, and C," for example, means (A), (B), (C), (A and B), (A and C), (B and C), or (A, B, and C), including all other possible permutations when more than three items are listed.

[0049] The embodiments disclosed herein may use circuitry to implement the technologies and methodologies described herein, functionally connect two or more components, generate information, determine operating conditions, control an apparatus, device, or process, and / or the like. Any type of circuitry may be used. In one embodiment, the circuitry includes, among other things, one or more computing devices such as a processor (e.g., a microprocessor), a central processing unit, processing unit (CPU), digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or similar, or any combination thereof, and may include separate digital or analog circuit elements or electronics, or combinations thereof.

[0050] An embodiment includes one or more data stores that, for example, store instructions or data. Non-limiting examples of one or more data stores include volatile memory (e.g., random access memory (RAM), dynamic random access memory (DRAM), or the like), non-volatile memory (e.g., read-only memory (ROM), electrically erasable read-only memory (EEPROM), compact disc read-only memory (CD-ROM), or the like), persistent memory, or the like. Other non-limiting examples of one or more data stores include erasable and programmable read-only memory (EPROM), flash memory, or the like. The one or more data stores may be connected, for example, to one or more computing devices by one or more instructions, data, or power buses.

[0051] In one embodiment, the circuitry includes a computer-readable media player or a memory slot configured to accept a signal-carrying medium (for example, computer-readable memory storage, computer-readable recording storage, or the like). In one embodiment, a program to cause a system to perform any of the disclosed processes may be stored, for example, on computer-readable recording storage (CRMM), a signal-carrying medium, or the like.Non-limiting examples of signal-carrying media include recordable media such as any form of flash memory, magnetic tape, floppy disk, hard disk drive, compact disc (CD), digital video disc (DVD), Blu-Ray disc, digital tape, computer memory, or the like, and transmission media such as digital and / or analog communication media (e.g., fiber optic cable, waveguide, wired communication link, wireless communication link (e.g., transmitter, receiver, transceiver, transmission logic, receiving logic, etc.).Other non-limiting examples of signal carrier media include, but are not limited to, DVD-ROM, DVD-RAM, DVD+RW, DVD-RW, DVD-R, DVD+R, CD-ROM, Super Audio CD, CD-R, CD+R, CD+RW, CD-RW, compact video discs, super video discs, flash memory, magnetic tape, magneto-optical disc, MINIDISC, non-volatile memory card, EEPROM, optical disc, optical storage, RAM, ROM, system memory, web server, or similar.

[0052] The detailed description presented above in relation to the accompanying drawings, where similar numbers refer to similar features, is intended to be This disclosure provides a description of various embodiments and is not intended to represent the only embodiments. Each embodiment described herein is provided solely as an example or illustration and should not be construed as preferred or advantageous over other embodiments. The illustrative examples provided herein are not intended to be exhaustive or to limit the disclosure to the specific forms disclosed. Similarly, all the steps described herein may be interchangeable with other steps, or combinations of steps, to achieve the same or substantially similar results.In general, the embodiments disclosed here are not limiting, and the inventors contemplate that other embodiments within the scope of this disclosure may include structures and features from more than one specific embodiment shown in the figures and described in the patent memorandum.

[0053] In the preceding description, specific details are presented to allow for a thorough understanding of examples of embodiments of this disclosure. However, it will be apparent to those skilled in the art that the embodiments described herein can be implemented without incorporating all the specific details. In some cases, well-known process steps have not been described in detail so as not to unnecessarily obscure various aspects of this disclosure. Furthermore, it should be noted that the embodiments of this disclosure may employ any combination of features described herein.

[0054] This application may include references to directions, such as "vertical", "horizontal", "front", "back", "left", "right", "up" and "down", etc. These references, and other similar references in this application, are intended to help describe and understand the particular embodiment (such as when the embodiment is positioned for use) and are not intended to limit this disclosure to those directions or locations.

[0055] This application may also refer to quantities and numbers. Unless otherwise specified, these quantities and numbers are not to be considered restrictive, but rather as examples of the possible quantities or numbers associated with this application. Similarly, in this respect, this application may use the term "plurality" to refer to a quantity or number. In this respect, the term "plurality" is understood to mean any number greater than one, for example, two, three, four, five, etc. The terms "about," "approximately," etc., mean to within 5% of the stated value. The term "based on" means "based at least partially on."

[0056] The principles, representative embodiments, and modes of operation of this disclosure have been described in the preceding description. However, Aspects of this disclosure that are intended to be protected should not be construed as being limited to the specific implementations disclosed. Furthermore, the implementations described herein should be considered illustrative rather than restrictive. It should be understood that variations and changes may be made by others, and equivalents may be used, without departing from the spirit of this disclosure. Accordingly, it is expressly intended that all such variations, changes, and equivalents fall within the spirit and scope of this disclosure as claimed.

[0057] Although illustrative embodiments have been shown and described, it will be appreciated that various changes can be made to them without departing from the spirit and scope of the invention.

Claims

Demands

1. Distribution system (210), comprising: a first shaft (31 OA) and a second shaft (310B); a first gear transmission system (302A) disposed on the first shaft, the first gear transmission system comprising: a first gear (303A); a second gear (303B); a first pump roller (201 A) configured to dispense a first formula; and a second pump roller (201B) configured to dispense a second formula; a second gear transmission system (302B) disposed on the second shaft, the second gear transmission system comprising: a third gear (304A); a fourth gear (304B); and a synchronizer (305) configured to slide between the third gear and the fourth gear;and a motor (205) configured to rotate the first shaft and the second shaft, wherein the motor is configured to control both the first pump roller and the second pump roller.

2. Distribution system according to claim 1, wherein the first gear (303A) is configured to mesh with the third gear (304A); and wherein a gear ratio of the first gear and the third gear controls a flow rate of the first formula and the second formula.

3. Distribution system according to claim 1, wherein the second gear (303B) is configured to mesh with the fourth gear (304B).

4. Distribution system according to claim 1, wherein the first gear (303A) is fixed, or the second gear (303B) is fixed.

5. Distribution system according to claim 1, wherein the third gear (304A) rotates freely.

6. Distribution system according to claim 1, wherein a gear ratio of the first gear (303A) and the third gear (304A) controls a mixing ratio between the first formula and the second formula.

7. Distribution system according to claim 1, wherein a gear ratio of the second gear (303B) and the fourth gear (304B) controls a flow rate of the first formula and the second formula, or a mixing ratio of the first formula and the second formula.

8. Distribution system according to claim 1, wherein the synchronizer (305) slides laterally along fixed shaft splines (306A, 306B) of the second shaft.

9. Distribution system according to claim 1, wherein the third gear (304A) comprises a third gear attachment (307) configured to removably couple to the synchronizer; or wherein the fourth gear comprises a fourth gear attachment configured to removably couple to the synchronizer.

10. Hair care device comprising the dispensing system (210) according to claim 1.

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