Hair dyeing master and hair dyeing device

Abstract

This invention provides a hair dyeing main unit and a hair dyeing device, belonging to the field of personal care technology. The hair dyeing main unit includes: a dye cylinder with a suction port and an atmospheric connection port; a piston disposed inside the dye cylinder and located between the suction port and the atmospheric connection port to isolate the hair dye in the dye cylinder to the side near the suction port, the piston having a mating hole; a stirring element rotatably disposed inside the dye cylinder around its axis, the stirring element extending along the axis and movably passing through the mating hole; a driving device for driving the stirring element to rotate around the axis of the dye cylinder; and a pump connected to the suction port for drawing fluid between the piston and the suction port, thereby driving the piston to move relative to the stirring element along the axis. The hair dyeing main unit of this application embodiment can avoid mutual interference between the stirring and discharging components, simplify the structure, and reduce dye residue.

Description

Technical Field

[0001] This application belongs to the field of personal care technology, and more specifically, relates to a hair dyeing host and hair dyeing device. Background Technology

[0002] Hair dyes are prone to sedimentation and stratification during storage and use; uneven mixing can directly affect the dyeing effect. Therefore, hair dye dispensing equipment typically needs to have both stirring and discharging functions.

[0003] However, in existing equipment, there is mutual interference between the stirring and discharging actions. On the one hand, the movement of the stirring components may hinder the smooth discharge of dye, resulting in discontinuous discharge or unstable flow rate; on the other hand, the movement of the discharging mechanism may restrict the arrangement and range of motion of the stirring components, significantly reducing the stirring effect. Furthermore, because the stirring and discharging functions are mutually constrained, existing equipment often requires separate drive systems or actuators for stirring and discharging, which not only increases the overall structural complexity and size of the machine but also makes it easy for dye to remain inside the equipment. After long-term use, the solidified residue can affect hygiene and safety and extend the service life.

[0004] Therefore, a new technical solution is urgently needed to solve the problems of mutual interference between stirring and discharge, complex structure, and serious dye residue in the existing technology. Summary of the Invention

[0005] This application provides a hair dyeing host that avoids interference between the stirring and discharging components, simplifies the structure, and reduces dye residue.

[0006] The technical solution adopted in this application embodiment is: providing a hair dyeing host, including:

[0007] The dye cartridge is equipped with a suction port and an air vent.

[0008] A piston is disposed inside the dye cartridge and located between the suction port and the atmospheric connection port to isolate the hair dye in the dye cartridge to the side near the suction port. The piston is provided with a mating hole.

[0009] A stirring element is rotatably disposed inside the dye cylinder about the axis of the dye cylinder, and the stirring element extends along the axis and is movably disposed through the mating hole;

[0010] A driving device for driving the stirring element to rotate about the axis; and

[0011] A pump, connected to the suction port, is used to draw fluid between the piston and the suction port, thereby driving the piston to move relative to the stirring element along the axis.

[0012] Furthermore, the stirring component includes a connecting part and at least one stirring rod;

[0013] The connecting part is connected to the output end of the driving device in a transmission manner;

[0014] One end of the stirring rod is connected to the connecting part, and the other end extends parallel to the axis, with the stirring rod offset from the axis.

[0015] Furthermore, there are multiple stirring rods, which are arranged at intervals around the axis.

[0016] Furthermore, among the plurality of stirring rods, at least two of the stirring rods have unequal radial distances to the axis.

[0017] Furthermore, the stirring component includes a connecting portion and at least one blade;

[0018] The connecting part is connected to the output end of the driving device in a transmission manner;

[0019] The blade is fixed to the side of the connecting portion facing the piston and extends parallel to the axis.

[0020] Furthermore, the blade is plate-shaped, the shape of the mating hole matches the cross-sectional shape of the blade, and the piston is slidably fitted onto the blade through the mating hole.

[0021] Furthermore, the blade is provided with a plurality of through holes spaced apart along the axis;

[0022] The piston is made of an elastic material, the mating hole is interference-fitted with the blade, and the dimension of the mating hole along the axis is larger than the dimension of the through hole along the axis.

[0023] Furthermore, the outer circumferential surface of the piston is integrally provided with at least one sealing ring, and the sealing ring is interference-fitted with the inner wall of the dye cylinder;

[0024] Alternatively, the outer circumferential surface of the piston is provided with an annular groove, and a sealing ring is embedded in the annular groove. Both ends of the sealing ring are funnel-shaped to seal against the inner wall of the dye cylinder.

[0025] Furthermore, the dye cartridge includes a cartridge body and an end cap. One end of the cartridge body is provided with the suction port, and the other end has an opening. The end cap can be detachably closed to close the opening, and the end cap is provided with an atmospheric communication port.

[0026] This application also provides a hair dyeing device, including a comb and a hair dyeing main unit as described in any of the above embodiments;

[0027] The hair dyeing main unit also includes a housing, and the dye cylinder, drive device and pump are all located inside the housing;

[0028] The comb head is installed in the housing, and the comb head has a hair dye extrusion port, which is connected to the outlet of the pump.

[0029] The beneficial effects of the hair dyeing host provided in this application embodiment are as follows: In the hair dyeing host of this application embodiment, the stirring element passes through the piston mating hole, and the stirring element and the piston form a sliding fit along the axis, so that the rotational movement of the stirring element and the axial sliding of the piston do not interfere with each other. The stirring element rotates around the axis of the dye cylinder under the drive of the drive device, stirring the dye, and at the same time, it drives the piston to rotate synchronously through the mating hole. When the pump starts to suck, a negative pressure is formed between the piston and the suction port, and the atmospheric connection port is connected to the atmosphere. Under the action of atmospheric pressure, the piston slides along the stirring element in the dye cylinder, pushing the dye to the suction port and discharging it. In this application, the stirring element serves as both a stirring actuator and a sliding guide and rotational transmission component for the piston, eliminating the need for separate drive systems or actuators for stirring and discharging, greatly simplifying the overall structure. The stirring element extends along the axis and passes through the piston, without occupying additional radial space, making the equipment layout more compact. As the piston rises, it remains close to the liquid surface. Combined with the stirring action of the agitator, the dye can be fully agitated and almost completely discharged, significantly reducing residue inside the cavity, preventing residue from solidifying and bacteria from growing, and extending the service life of the equipment. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A three-dimensional structural diagram of the hair dyeing device provided in this application;

[0032] Figure 2 A longitudinal sectional view of the hair dyeing device provided in this application;

[0033] Figure 3 A three-dimensional sectional view of the hair dyeing device provided in this application;

[0034] Figure 4 Exploded view of the hair dyeing device provided in this application;

[0035] Figure 5 This is a perspective view of the assembly of the stirring element and the piston in one embodiment of this application;

[0036] Figure 6 for Figure 5 A cross-sectional view of the assembly of the agitator and piston in the illustrated embodiment;

[0037] Figure 7 This is a partial longitudinal sectional view of a hair dyeing device according to another embodiment of this application.

[0038] Figure 8 for Figure 7 An assembly perspective view of the stirring element and piston in the illustrated embodiment;

[0039] Figure 9 for Figure 7 A partial cross-sectional view of the stirring element and piston in the illustrated embodiment;

[0040] Figure 10 This is a partial cross-sectional view of the agitator and piston after the sealing ring has been replaced in another embodiment of this application.

[0041] The following are the labeling elements in the figure:

[0042] 100. Hair dyeing device;

[0043] 1. Hair dyeing main unit;

[0044] 11. Dye cartridge; 111. Suction port; 112. Opening; 113. Cartridge body; 114. End cap; 1141. Atmospheric vent;

[0045] 12. Stirring component; 121. Connecting part; 122. Stirring rod; 124. Blade; 1241. Through hole; 125. Central shaft;

[0046] 13. Piston; 131. Mating hole; 132. Sealing ring; 133. Annular groove; 134. Sealing ring; 1341. Trumpet-shaped ring lip; 135. Center hole;

[0047] 14. Drive unit; 141. Output terminal;

[0048] 15. Pump; 151. Discharge port;

[0049] 17. Shell;

[0050] 2. Combing hair; 21. Hair dye dispenser. Detailed Implementation

[0051] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0052] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0053] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0055] Please see Figure 1 , Figure 2 and Figure 3 The hair dyeing host 1 provided in the embodiments of this application will now be described. The hair dyeing host 1 provided in the embodiments of this application includes a dye cylinder 11, a stirring element 12, a piston 13, a driving device 14, and a pump 15.

[0056] Reference Figure 2 and Figure 3 The dye container 11 is equipped with a suction port 111 and an air vent 1141. The dye container 11 is the main container that holds the hair dye and provides space for stirring and extrusion. It can be cylindrical and made of transparent plastic for easy observation of the remaining dye, or opaque materials such as metal or ceramic to protect the dye from light. The suction port 111 is a fluid outlet channel located at one end or on the side wall of the dye container 11. Its location can be at the center or off-center of the axial end of the dye container 11, for example, at the upper end of the dye container 11. The air vent 1141 can be located at the other end of the dye container 11, connecting the inside of the dye container 11 to the outside atmosphere.

[0057] The piston 13 is located inside the dye cylinder 11 and between the suction port 111 and the atmospheric connection port 1141. It isolates the hair dye in the dye cylinder 11 on the side close to the suction port 111, so that the side of the piston 13 away from the suction port 111 is connected to the atmosphere through the atmospheric connection port 1141. The piston 13 is provided with a mating hole 131.

[0058] Reference Figure 2 and Figure 3 The piston 13 is a sealed moving part that plays a role in isolation and propulsion inside the dye cylinder 11. Its outer contour matches the inner wall of the dye cylinder 11, for example, it is disc-shaped or a plunger-shaped part with a skirt. The material can be rubber, silicone, polyurethane or other elastomers or hard plastic with an outer sealing ring 134.

[0059] The agitator 12 is rotatably disposed inside the dye cylinder 11 around its axis. The agitator 12 extends along the axis of the dye cylinder 11 and is movably inserted through the mating hole 131 of the agitator 12. The agitator 12 is used to mix the hair dye in the dye cylinder 11, and its surface may be provided with protrusions, grooves, or through holes to enhance the agitation effect. The agitator 12 extends throughout the entire length of the dye cylinder 11, ensuring that the dye from bottom to top is effectively agitated, preventing stratification and sedimentation. The mating hole 131 is a through channel opened at the center or a specific location of the piston 13. Its cross-sectional shape is adapted to the outer contour of the cross-section of the agitator 12 perpendicular to the axis of the dye cylinder 11. For example, when the agitator 12 is a cylindrical rod, the mating hole 131 is a circular hole; when the agitator 12 is a flat plate, the mating hole 131 is a rectangular or oblong hole, thereby achieving guidance, relative sliding, and sealing between the two.

[0060] Reference Figure 2 and Figure 3 The drive unit 14 is used to drive the stirring component 12 to rotate around the axis of the dye cylinder 11. The drive unit 14 provides rotational power to the stirring component 12, and the drive unit 14 can be a DC geared motor, stepper motor, servo motor, etc. The output shaft of the drive unit 14 can be connected to the stirring component 12 through a coupling, gear set, synchronous belt, or direct plug-in connection.

[0061] Pump 15 is connected to suction port 111 and is used to draw fluid between piston 13 and suction port 111 to create a negative pressure between piston 13 and suction port 111. Pump 15 can be a peristaltic pump 15, diaphragm pump 15, gear pump 15, or piston pump 13, etc. Pump 15 is sealed to suction port 111 through a pipeline. When working, pump 15 actively draws fluid from the front chamber of piston 13, making the pressure in this area lower than atmospheric pressure, thereby forming a continuous negative pressure difference. This pressure difference is not only the driving force for dye discharge, but also the driving force for piston 13 to automatically follow.

[0062] During operation, the drive unit 14 drives the stirring element 12 to rotate, mixing the hair dye in the dye cylinder 11. The stirring element 12 passes through the mating hole 131 of the piston 13, driving the piston 13 to rotate synchronously. When it is necessary to discharge the hair dye, the pump 15 starts, drawing air from the suction port 111 (e.g., suction port 111 is at the top), creating a negative pressure area above the piston 13. The piston 13 is connected to the atmosphere through the atmospheric connection port 1141. Atmospheric pressure acts on the bottom surface of the piston 13, pushing the piston 13 to slide upward along the stirring element 12. As the piston 13 rises, it pushes the hair dye liquid surface closer to the suction port 111, and the hair dye is continuously drawn out by the pump 15 and transported to the outside. Since the stirring element 12 is always inserted in the piston 13, the stirring and discharge processes can be carried out simultaneously without interference. The stirring element 12 serves as both a stirring actuator and a sliding guide and rotation transmission component of the piston 13, achieving multiple functions and greatly simplifying the overall structure of the machine. The negative pressure suction method ensures smooth and continuous discharge, avoiding the jamming and material interruption problems caused by mechanical pushing. During the upward movement of piston 13, it remains close to the liquid surface. Combined with the stirring action of agitator 12, the dye can be fully agitated and almost completely discharged, significantly reducing residue inside the cavity.

[0063] Furthermore, referring to Figure 2 , Figure 5 and Figure 6 The stirring component 12 includes a connecting part 121 and at least one stirring rod 122; the connecting part 121 is connected to the output end 141 of the driving device 14; one end of the stirring rod 122 is connected to the connecting part 121, and the other end extends parallel to the axis of the dye cylinder 11, and the stirring rod 122 is offset from the axis of the dye cylinder 11.

[0064] The connecting part 121 can be a flange, coupling sleeve, splined shaft head, magnetic base, etc., and is responsible for guiding the rotational torque of the motor to the stirring rod 122. The connecting part 121 can be located at the top or bottom of the dye cylinder 11 near the suction port 111, or it can be built into the shoulder of the cylinder body, or exposed outside the cylinder body and supported by a sealed bearing.

[0065] The cross-section of the stirring rod 122 can be circular, elliptical, rectangular, triangular, etc., and the number can be one, two, or more, depending on the viscosity of the dye and the diameter of the cylinder. Each stirring rod 122 is arranged strictly parallel to the axis of the dye cylinder 11, but its geometric center line does not coincide with the cylinder body, but maintains a certain eccentricity. This offset design allows the stirring rod 122 to sweep through a larger annular area during its revolution, rather than simply spinning in place at the center.

[0066] When the drive unit 14 drives the stirring rod 122 to rotate around the axis of the dye cylinder 11 via the connecting part 121, the stirring rod 122 itself is off-axis, and its movement trajectory is actually a cylindrical surface centered on the cylinder axis, thus generating strong shearing and convection effects on the dye inside the cylinder. This eccentric revolution stirring method, compared with the traditional central shaft 125 stirring, can effectively reach the stagnation zone near the cylinder wall, greatly reducing the stirring dead zone. At the same time, the structural feature of the stirring rod 122 extending along the entire axial length ensures that a uniform mixing effect can be obtained within the entire liquid column height range from the surface of the piston 13 to the suction port 111, avoiding the problem of inconsistent dye concentration between the upper and lower layers. As the piston 13 moves forward with the negative pressure, the stirring rod 122 always passes through the mating hole 131 of the piston 13 and maintains relative sliding, which does not affect the sealing and advancement of the piston 13, and can maintain dynamic stirring throughout the extrusion process, truly achieving temporal and spatial synchronization of stirring and extrusion.

[0067] In some embodiments, the number of stirring rods 122 is one.

[0068] In some embodiments, refer to Figure 3 The number of stirring rods 122 is multiple, and these multiple stirring rods 122 are arranged at intervals around the axis of the dye cylinder 11. "Multiple" here refers to two or more stirring rods 122, and the specific number can be optimized according to the volume and diameter of the dye cylinder 11 and the rheological properties of the hair dye. Specifically, it can be configured as a two-rod, three-rod, or four-rod structure. For example, two rods can be symmetrically arranged at 180 degrees, three rods can be evenly distributed at 120 degrees, or four rods can be orthogonally distributed at 90 degrees. An asymmetrical angular layout can also be used. Each stirring rod 122 is independently connected to the same connecting part 121 or fixed to each other through an intermediate support, forming a rigid integral stirring frame that collectively bears the torque from the drive device 14 and works collaboratively on the fluid inside the cylinder.

[0069] To improve the stability of piston 13 rotation, the stirring component 12 may further include a central shaft 125. The upper end of the central shaft 125 is fixedly connected to the connecting part 121, and the lower end extends along the axial direction of the dye cylinder 11 and slides through the piston 13. The central shaft 125 coincides with or nearly coincides with the axis of the dye cylinder 11, forming a central guide for piston 13 rotation. A corresponding central hole 135 is provided on the piston 13, through which the central shaft 125 passes, and the two are axially slidingly engaged. Since the piston 13 and the stirring component 12 are fixedly connected in the circumferential direction, the piston 13 rotates synchronously with the stirring component 12. The central shaft 125 does not rotate relative to the piston 13, but rather provides radial positioning and guiding support for the rotation and sliding of the piston 13. The lower end of the central shaft 125 may be suspended, or it may form a clearance fit or rotatable support with the bottom cover or the bottom of the dye cylinder 11 to enhance the rigidity of the overall structure. When the stirring component 12 includes a central shaft 125, the stirring rod 122 is arranged around the periphery of the central shaft 125, forming a cage-like or frame-like structure together with the central shaft 125. The piston 13 rotates synchronously around the central shaft 125 under the drive of the stirring rod 122, and slides axially along the central shaft 125 at the same time. The central shaft 125 prevents the piston 13 from radially deviating or tilting and getting stuck during rotation and sliding.

[0070] The use of multiple spaced stirring rods 122 allows for more perturbations of the dye within a single rotation cycle, significantly increasing the mixing frequency per unit time. Compared to a single-rod structure, the multi-rod layout not only expands the effective mixing volume coverage but also creates stronger shear gradients and vortex interactions between adjacent rods, promoting microscopic homogenization within the high-viscosity dye. More importantly, this circumferentially spaced arrangement breaks the axisymmetry of the flow field, suppressing the "channeling" phenomenon formed by the cyclical movement of solid particles along a single track. This allows for thorough exchange of dye components in three-dimensional space, further ensuring the color consistency and chemical stability of the final extruded product.

[0071] In some embodiments, refer to Figure 6 In the case of multiple stirring rods 122, at least two stirring rods 122 are not equidistant from the axis of the dye cylinder 11. That is, the stirring rods 122 are not all on the same radius of rotation, but have differentiated eccentricities; for example, one rod may be closer to the cylinder wall, another closer to the center, or the three rods may be located at three different radial levels: near, middle, and far. Figure 6 In this case, L2 > L1. This non-uniform diameter arrangement can be achieved by adjusting the position of each mounting hole on the connecting part 121, using stirring rods 122 of different lengths, or adding an eccentric adapter sleeve to the connecting part 121. Its core purpose is to break the coaxial cylindrical surface overlap of the movement trajectory of all stirring rods 122 and construct a multi-layered, non-repetitive spatial sweeping path.

[0072] In actual operation, since the rotation radius of each stirring rod 122 is different, the linear velocity, centrifugal force and fluid resistance they experience are also different. The resulting complex turbulent field can effectively break down the laminar boundary layer, especially enhance the material exchange efficiency between the near wall and the central region, making the stirring process more gentle and thorough.

[0073] In some embodiments, refer to Figure 7 and Figure 8 The stirring component 12 includes a connecting part 121 and at least one blade 124; the connecting part 121 is connected to the output end 141 of the drive device 14; the blade 124 is fixed to the side of the connecting part 121 facing the piston 13 and extends parallel to the axis of the dye cylinder 11.

[0074] The connecting part 121 is a base component that supports the blade 124 and docks with the drive source. It can be a disc, a polygonal plate, or a hub structure with a boss. The connecting part 121 is installed inside the dye cylinder 11 at one end near the drive device 14. Its surface facing the piston 13 serves as the mounting reference surface for the blade 124. One or more blades 124 can be firmly connected by means of screws, welding, snap-fit, or integral injection molding to ensure that they do not loosen or deform under high-speed rotation.

[0075] The blade 124 is a flat working unit that directly participates in fluid disturbance. Its cross-sectional profile perpendicular to the axis of the dye cylinder 11 can be rectangular, trapezoidal, arc-shaped, etc. Each blade 124 is fixed vertically or nearly vertically to the surface of the connecting part 121 and extends strictly downward along the axis of the dye cylinder 11 to near the initial position of the piston 13, forming one or more longitudinal baffles. This combined structure of the connecting part 121 and the blade 124 transforms rotational motion into a composite flow of axial pushing and radial throwing of the dye, which is particularly suitable for mixing and conveying medium- and high-viscosity pastes.

[0076] During operation, the connecting part 121 drives the blades 124 to rotate around the axis of the dye cylinder 11 for stirring and mixing. Since the blades 124 are arranged along the entire axial length, their disturbance effect on the dye continues throughout the entire extrusion stroke, preventing the phenomenon of the upper part being mixed while the lower part remains layered. Simultaneously, the rigid connection between the blades 124 and the connecting part 121 ensures direct power transmission, avoiding the lag and energy loss that may result from flexible connections. Compared to the rod-type stirring embodiment, the plate-type blades 124 have a larger frontal area and a higher pumping capacity. While stirring, they also help establish an axial pressure gradient pointing towards the suction port 111, forming a combined force with the negative pressure suction of the external pump 15, further improving extrusion efficiency and response speed.

[0077] Furthermore, referring to Figure 7 and Figure 8The blade 124 is plate-shaped, and the shape of the mating hole 131 matches the cross-sectional shape of the blade 124. The piston 13 is sealed and slidably fitted onto the blade 124 through the mating hole 131.

[0078] The plate-shaped blade 124 specifically refers to a flat solid structure with a clear width-to-thickness ratio. Its cross-section can be rectangular, rounded rectangular, or a trapezoid with chamfers, and its width is sufficient to form an effective guiding and anti-rotation contact surface on the piston 13. The mating hole 131 is a through opening 112 on the piston 13 that precisely corresponds to the cross-section of the blade 124. If the blade 124 is a rectangular plate, then the mating hole 131 is also a rectangular through hole; if the edge of the blade 124 has a rounded transition, then the corner of the hole is rounded accordingly. The two are interference-fitted to ensure sliding and sealing.

[0079] Based on the above structure, during operation, the entire surface of the blade 124 of the hair dyeing unit 1 provides continuous and stable axial support for the piston 13, effectively preventing the piston 13 from tilting or flipping under negative pressure, and ensuring uniform sealing of the lip. At the same time, the mating relationship between the plate-shaped blade 124 and the mating hole 131 restricts the circumferential freedom of the piston 13 relative to the blade 124, so that it can only translate along the axis of the dye cylinder 11 and cannot rotate on its own, perfectly realizing the motion constraint of "axial sliding and circumferential anti-rotation".

[0080] Furthermore, referring to Figure 7 and Figure 8 The blade 124 has multiple through holes 1241 spaced apart along the axis of the dye cylinder 11; the piston 13 is made of elastic material, and the mating hole 131 is interference-fitted with the blade 124. The size H1 of the mating hole 131 along the axis of the dye cylinder 11 is larger than the size H2 of the through hole 1241 along the axis of the dye cylinder 11, so as to maintain continuous sealing during the sliding of the piston 13 along the blade 124.

[0081] The through hole 1241 can be circular, elliptical, elongated, or irregular. Multiple through holes 1241 are arranged repeatedly at certain intervals along the length of the blade 124. The purpose is to allow the dye to pass through the blade 124 body during stirring, while ensuring the structural strength of the blade 124, thereby enhancing the coupling effect of axial circulation and radial mixing. The piston 13 is made of a material with good resilience, such as silicone, fluororubber, or thermoplastic elastomer. The inner diameter of its mating hole 131 is slightly smaller than the thickness or width of the blade 124. After assembly, it tightly wraps around the surface of the blade 124 by the elastic deformation of the material itself, forming an initial interference seal.

[0082] Because the axial dimension H1 of the mating hole 131 (i.e., the contact length of the piston 13 in the sliding direction of the blade 124) is deliberately designed to be larger than the axial dimension H2 of a single through hole 1241, this means that no matter where the piston 13 moves to the blade 124, the inner wall of its mating hole 131 will always cover at least one complete through hole 1241 area, and there is also a surplus sealing section above or below the hole to maintain a tight fit with the solid part of the blade 124. Even if a through hole 1241 happens to slide into the range of the mating hole 131, due to the elastic filling effect and thickness redundancy of the piston 13 material, the dye cannot leak back from the hole to the rear of the piston 13. On the one hand, the presence of the through hole 1241 significantly improves the mixing efficiency, allowing the dye to move freely before and after the blade 124, eliminating the inherent flow dead zone of the plate structure. On the other hand, the interference fit and dimensional excess design ensure that the piston 13 and the blade 124 maintain a dynamic seal throughout the entire extrusion stroke, eliminating the risk of dye bypassing the piston 13 and flowing back or leaking. The adaptive properties of the elastic material can also compensate for processing tolerances and wear clearances, making the sealing performance stable and reliable throughout the entire life cycle, truly achieving a perfect unity of efficient mixing and zero-leakage extrusion.

[0083] In some embodiments, refer to Figure 9 The piston 13 has at least one sealing ring 132 integrally protruding from its outer circumference. The sealing ring 132 is interference-fitted with the inner wall of the dye cylinder 11. The sealing ring 132 is an annular protrusion formed directly on the outer circumference of the piston 13. Its cross-section can be semi-circular, triangular, or rectangular, and its height is slightly larger than the gap between the piston 13 body and the cylinder wall. It achieves a seal by relying on its own elasticity or plastic deformation to tightly adhere to the inner wall of the cylinder. This integrated structure is simple, robust, and has no risk of falling off. It is suitable for low to medium viscosity dyes or applications requiring extremely high cleanliness. The radial pressure generated by the interference fit directly seals the gap, simply and effectively preventing the hair dye from leaking from the gap between the piston 13 and the cylinder wall.

[0084] In some embodiments, refer to Figure 10The piston 13 has an annular groove 133 on its outer circumferential surface, and a sealing ring 134 is embedded in the annular groove 133. Both ends of the sealing ring 134 are funnel-shaped to seal against the inner wall of the dye cylinder. That is, the sealing ring 134 has a bidirectional funnel-shaped annular lip 1341; wherein, the funnel-shaped annular lip 1341 located near the suction port 111 faces the suction port 111, and the funnel-shaped annular lip 1341 located at the other end faces away from the suction port 111. The annular groove 133 is a standardized groove pre-reserved on the outer circumference of the piston 13 to accommodate the independent sealing ring 134. The sealing ring 134 adopts a specially designed bidirectional funnel-shaped annular lip 1341 structure, that is, two conical lips are arranged back to back, with the front lip facing forward (towards the suction port 111) and the rear lip facing backward, forming a symmetrical bidirectional sealing posture. When the front chamber of piston 13 experiences negative pressure due to suction from pump 15, the external atmospheric pressure or the pressure from the rear chamber's supplementary air causes the rear lip to adhere more tightly to the cylinder wall. Conversely, when the pressure in the front chamber increases instantaneously during extrusion, the front lip is pressed in the opposite direction. These two lips act like two one-way valves; regardless of the pressure difference direction, one lip is always in a reinforced sealing state, completely eliminating the possibility of bidirectional leakage. This adaptive sealing mechanism is particularly suitable for the frequent pressure fluctuations during hair dye extrusion, ensuring smooth sliding under low friction while providing reliable sealing during high-pressure peaks, significantly extending seal life and improving extrusion accuracy.

[0085] Furthermore, referring to Figure 2 and Figure 4 The dye cartridge 11 includes a cartridge body and an end cap 114. One end of the cartridge body is provided with a suction port 111 and the other end is provided with an opening 112. The hair dyeing host 1 also includes an end cap 114 that can be detachably closed to the opening 112. An air communication port 1141 communicating with the atmosphere is provided on the end cap 114.

[0086] The cylinder is generally cylindrical and hollow, with an opening 112 at one end and a sealed suction port 111 at the other. The piston is located inside the cylinder and can slide along the inner wall of the cylinder in a sealed manner. The opening 112 is a pre-reserved channel for loading and maintenance at the rear end of the dye cylinder 11. It can be a fully open opening, a necked opening, or a flanged mating surface. The size must be large enough to allow for smooth injection of hair dye or replacement of the piston 13 assembly. Alternatively, the hair dye to be mixed can be injected after the piston 13 is removed. The end cap 114 is a sealing component that matches the opening 112. It can be quickly installed and removed by means of threaded engagement, snap-locking, magnetic adsorption, or bolt tightening. The atmospheric connection port 1141 is a small-diameter channel penetrating the body of the end cap 114. One-way vent valves, dust filters, and other accessories can be directly drilled or embedded in it. Its function is to allow outside air to freely enter the rear cavity of the piston 13 while preventing dust and foreign objects from entering.

[0087] During the extrusion of hair dye, as the piston 13 moves towards the suction port 111, the space behind it gradually increases. Without the atmospheric connection port 1141, this closed chamber would create a vacuum, which would not only offset part of the effective suction force of the pump 15 but also cause the piston 13 to be obstructed, vibrate, or even stop moving. The presence of the atmospheric connection port 1141 replenishes air in a timely manner, maintaining the rear chamber of the piston 13 at a constant atmospheric pressure. This allows the negative pressure of the pump 15 to be fully utilized to propel the piston 13 forward and expel the dye, ensuring the purity and stability of the extrusion force. Simultaneously, the design of the removable end cap 114 greatly improves the maintainability of the equipment and the user experience. Users can easily open the rear cap to clean the cylinder, add new dye, or check the status of the piston 13 without disassembling the entire machine. The atmospheric connection port 1141, combined with the dustproof structure, avoids the risk of contamination while ensuring functionality.

[0088] Reference Figure 1 This application also provides a hair dyeing device 100, including a comb head 2 and a hair dyeing host 1 as described in any of the above embodiments; the hair dyeing host 1 further includes a housing 17, and a dye cylinder 11, a drive device 14 and a pump 15 are all disposed in the housing 17; the comb head 2 is installed in the housing 17, and the comb head 2 has a hair dye extrusion port 21, which is connected to the discharge port 151 of the pump 15.

[0089] The comb head 2 is the terminal execution component that directly acts on the hair. The comb body can be a toothed hair dyeing comb, a roller applicator, a bristle dispenser, or a nozzle-type guide head, etc., with internal channels to evenly distribute the dye to each outlet point. The housing 17 is the external protective and structural support frame of the entire machine, and can be made of materials such as ABS, PC, or aluminum alloy. Internally, it contains mounting ribs, shock-absorbing pads, a circuit board compartment, and a battery compartment (powered by an internal battery), integrating all core components into a compact handheld or desktop unit. The comb head 2 can be fixedly installed or detachably installed to the housing 17. Fixed installation can use screws, bolts, and ultrasonic welding. Detachable installation can use quick-release interfaces, such as magnetic, snap-on, or plug-in types, for easy replacement of comb heads 2 with different functions or for thorough cleaning and disinfection.

[0090] During use, the mixing and extrusion system inside the main unit continuously supplies uniform dye, which is delivered to the distribution channel inside the comb 2 via the outlet 151 of the pump 15, and finally released onto the hair strands from the dye extrusion port 21 of the comb 2.

[0091] The hair dyeing device 100 of this application embodiment includes the hair dyeing host 1 in any of the above embodiments, and therefore has the beneficial effects brought by the hair dyeing host 1 in any of the above embodiments, which will not be repeated here.

[0092] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hair dyeing main unit, characterized in that, include: The dye cartridge is equipped with a suction port and an air vent. A piston is disposed inside the dye cartridge and located between the suction port and the atmospheric connection port to isolate the hair dye in the dye cartridge to the side near the suction port. The piston is provided with a mating hole. A stirring element is rotatably disposed inside the dye cylinder about the axis of the dye cylinder, and the stirring element extends along the axis and is movably disposed through the mating hole; A driving device is used to drive the stirring element to rotate around the axis; as well as A pump, connected to the suction port, is used to draw fluid between the piston and the suction port, thereby driving the piston to move relative to the stirring element along the axis.

2. The hair dyeing main unit according to claim 1, characterized in that, The stirring component includes a connecting part and at least one stirring rod; The connecting part is connected to the output end of the driving device in a transmission manner; One end of the stirring rod is connected to the connecting part, and the other end extends parallel to the axis, with the stirring rod offset from the axis.

3. The hair dyeing main unit according to claim 2, characterized in that, The number of stirring rods is multiple, and the multiple stirring rods are arranged at intervals around the axis.

4. The hair dyeing main unit according to claim 3, characterized in that, Of the plurality of stirring rods, at least two of the stirring rods are not equidistant from the radial distance to the axis.

5. The hair dyeing main unit according to claim 1, characterized in that, The stirring component includes a connecting part and at least one blade; The connecting part is connected to the output end of the driving device in a transmission manner; The blade is fixed to the side of the connecting portion facing the piston and extends parallel to the axis.

6. The hair dyeing host according to claim 5, characterized in that, The blade is plate-shaped, and the shape of the mating hole matches the cross-sectional shape of the blade. The piston is slidably fitted onto the blade through the mating hole.

7. The hair dyeing host according to claim 6, characterized in that, The blade is provided with multiple through holes spaced apart along the axis; The piston is made of an elastic material, the mating hole is interference-fitted with the blade, and the dimension of the mating hole along the axis is larger than the dimension of the through hole along the axis.

8. The hair dyeing main unit according to claim 1, characterized in that, The piston has at least one sealing ring integrally protruding on its outer circumferential surface, and the sealing ring is interference-fitted with the inner wall of the dye cylinder. Alternatively, the outer circumferential surface of the piston is provided with an annular groove, and a sealing ring is embedded in the annular groove. Both ends of the sealing ring are funnel-shaped to seal against the inner wall of the dye cylinder.

9. The hair dyeing main unit according to any one of claims 1 to 8, characterized in that, The dye cartridge includes a cartridge body and an end cap. One end of the cartridge body is provided with the suction port, and the other end has an opening. The end cap is detachably used to close the opening and is provided with an atmospheric connection port.

10. A hair dyeing device, characterized in that, Includes a comb and a hair dyeing main unit as described in any one of claims 1 to 9; The hair dyeing main unit also includes a housing, and the dye cylinder, drive device and pump are all located inside the housing; The comb head is installed in the housing, and the comb head has a hair dye extrusion port, which is connected to the outlet of the pump.

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