Patent Application
20250091234
The present disclosure relates to the technical field of hair cutters, in particular to a hair cutter with an identifying structure for a cutter head assembly.
A hair cutter is a tool for trimming hair. For example, body hair such as head hair, nose hair, longer beard or longer armpit hair can be trimmed by a hair cutter, and shorter stubble can also be trimmed by a hair cutter. However, most of the hair cutters currently on the market have one main body fixedly connected with one type of cutter head assembly. When users have different needs, they need to purchase multiple hair cutters, which is not only inconvenient to carry, but also results in higher costs to users.
In order to solve the above technical problems and meet the market demand, the industry has developed a connection structure which is mounted on the main body of the hair cutter and is adapted to receive various cutter head assemblies with different functions. Such interchangeable cutter head assemblies that are detachable from the connection structure between the cutter head assemblies and the same main body reduces the user's consumption costs and are also easy to carry when going out. However, since cutter head assemblies designed to cut head hair, nose hair, longer beard or longer armpit hair function differently and each require different running speeds, the same main body cannot make adaptive adjustments according to the required running speeds of the different functioning cutter head assemblies, thus users tend to have a poor user experience.
The present invention aims to solve the technical problem in the prior art that when a main body is adapted for multiple cutter head assemblies with different functions, it cannot make adaptive adjustments according to the required running speeds of the cutter head assemblies with different functions. Disclosed herein is a hair cutter with a cutter head assembly identification structure, so that when the same main body is adapted to multiple cutter head assemblies with different functions, it can identify the type of cutter head assembly and control the output speed of its internal drive assembly to further control the operating speed of the cutter head assembly.
In order to solve the above technical problems, the present invention provides the following technical solutions: a hair cutter according to the present invention comprises a main body and a cutter head assembly detachably connected with the main body. The cutter head assembly includes an identification part associated with and indicative of the cutting type of cutter head assembly that is disposed on the main body. The main body includes: a detection assembly configured to identify the cutting type of the cutter head assembly based on the identification part of the cutter head assembly; a drive assembly and a control board. The drive assembly and the control board, which is configured to control the drive assembly to drive the cutter head assembly to run based on the cutting type of the cutter head assembly, are arranged in an outer shell and/or an inner shell of the main body of the hair cutter. The drive assembly includes an output shaft that is detachable from connection with the cutter head assembly. The control board is electrically connected to the drive assembly and the detection assembly respectively. In an embodiment, the detection assembly may include a detection component printed circuit board (PCB).
The cutter head assembly identification part of the present disclosure can allow one main body to be used with multiple cutter head assemblies with different functions, so that one main body is suitable for trimming hair, nose hair, longer beards or longer armpit hair, body hair or the like and is also suitable for shorter stubble; since there is an identification part on the cutter head assembly to determine the unique identity, after the cutter head assembly is connected to the main body of the hair cutter, the detected hair will be detected through the detection assembly of the main body. The signal (received by the photoelectric receiver) from the identification part is fed back to the control board. The control board is configured to identify the corresponding cutter head assembly based on the signal, and then controls the output speed of the drive assembly to achieve the optimal operating speed of the cutter head assembly and enhance the user's experience.
Further, in an embodiment, the identification part may be or may include a light-transmitting plate connected to the side or bottom of the cutter head assembly facing the main body. The identification parts (e.g., light-transmitting plates) on different cutter head assemblies have different light transmittances; the detection assembly of the main body includes an identification channel configured to receive the light-transmitting plate. In an embodiment, there may be only one channel opening to the identification channel. The identification channel is made of a high transmittance material. An infrared transmitter is provided on/adjacent to one sidewall of the identification channel, and a photoelectric receiver is provided on/adjacent to the other sidewall. When the cutter head assembly is connected to the main body of the hair cutter, the light-transmitting plate on the cutter head assembly penetrates the main body when inserted into the identification channel through the channel opening; the infrared transmitter emits infrared light that passes through the sidewall and light-transmitting plate of the identification part and is received by the photoelectric receiver. Via the detection component PCB, a signal that is based on the photoelectric signal received by the photoelectric receiver is fed to the control board. The control board identifies the type of cutter head assembly according to the photoelectric signal, and controls the output speed of the drive assembly.
Further, in an embodiment, the distance between the infrared transmitter and the photoelectric receiver is 2 millimeters (mm)˜8 mm.
Furthermore, in an embodiment, the light transmittance of the material of the identification channel is above 85%.
Further, the main body includes an outer shell and a waterproof inner shell arranged inside the outer shell. The waterproof inner shell is sealed with a waterproof sealing cover at a port of the waterproof inner shell. The waterproof inner shell and the waterproof sealing cover cooperate to form a sealed cavity. The identification channel is disposed on the waterproof sealing cover, the channel body extends into the sealing cavity, and its channel opening is located on and accessed through the panel of the waterproof sealing cover; the light-transmitting plate of the cutter head assembly penetrates the outer shell of the main body and is inserted into the waterproof sealing cavity via the identification channel. The identification part is inserted into the channel opening on the sealing cover.
Further, a driving mechanism mounting seat is provided in the sealed cavity, and the detection component PCB of the detection assembly is arranged on the driving mechanism mounting seat, and the infrared emitter and the photoelectric receiver are respectively electrically connected to the detection component PCB through pins, so the detection component PCB is connected with the control board circuit.
Further, a receiving chamber is provided on the side of the drive assembly mounting seat facing the waterproof sealing cover, the detection component PCB is arranged at the notch of the receiving chamber, and the pins of the infrared transmitter and the photoelectric receiver pass through the detection component PCB then extend into the receiving chamber.
Further, in an embodiment, a partition is arranged inside the receiving chamber, which separates the pins of the infrared transmitter and the pins of the photoelectric receiver into two different spaces.
Further, in an embodiment, a positioning slot(s) facing the cutter head assembly is provided on the waterproof sealing cover, and a positioning pin(s) are provided on the cutter head assembly and are configured to be received into the positioning slot on the sealing cover.
Further, an annular protrusion/stopper is provided on the outer surface of the annular side wall of the waterproof sealing cover, and an annular groove is also arranged between the annular protrusion and the cover opening and on the surrounding outer surface of the annular side wall, and an annular sealing ring is arranged in the annular groove, the annular side wall of the waterproof sealing cover is inserted into the port of the waterproof inner shell, and the annular sealing ring in the annular groove is pressed against the side inner wall of the waterproof inner shell, and when the waterproof sealing cover is installed in place, the annular protrusion on it is generally parallel to and in contact with the plane of the port of the waterproof inner shell.
Further, a positioning post is provided on the waterproof sealing cover, and a positioning hole is provided inside the outer shell, and when the waterproof sealing cover is installed in place, the positioning post is inserted into the positioning hole; and/or when the waterproof sealing cover faces the sealing cavity. There is a threaded hole on one side, and a countersunk hole opposite to the threaded hole is provided on the driving mechanism mounting seat. The threaded fastener is screwed into the corresponding threaded hole after passing through the countersunk hole, and the driving mechanism mounting seat is connected to the waterproof sealing cover as one body.
Further, a spring mounting platform is also provided on the waterproof sealing cover, a spring piece mounted on the spring mounting platform, an assembly hole is arranged on the spring piece, and a fastener is provided on the cutter head assembly; when the cutter head assembly is installed on the main body, the fastener on the cutter head assembly snaps into the assembly hole on the spring piece.
Further, a cylindrical sleeve is arranged on the mounting seat of the driving mechanism, and the drive assembly is installed on the mounting seat of the driving mechanism, and the output shaft of the drive assembly runs through the cylindrical sleeve of the mounting seat of the driving mechanism, the waterproof sealing cover and the rear extension out to the outside of the sealed cavity; a double-slot transmission part is set on the free end of the output shaft of the drive assembly, and one of the grooves of the double-slot transmission part is set on the free end of the output shaft of the drive assembly, and the other a groove is sleeved on the linkage piece of the cutter head assembly.
Further, a stepped waterproof seal is arranged between the cylindrical sleeve and the waterproof sealing cover, and the waterproof seal is pressed against the cylindrical sleeve through the waterproof sealing cover, and the waterproof seal is wrapped on the side wall of the output shaft of the drive assembly.
In one aspect of the present disclosure, a hair cutter is disclosed. The hair cutter may comprise a cutter head assembly and a main body. The cutter head assembly has a cutting type, and is configured to be removably coupled to a main body. The cutter head assembly may include an identification part associated with the cutting type of the cutter head assembly. The main body may comprise a detection assembly, a drive assembly and a control board. The detection assembly may be configured to transmit a signal indicative of the cutting type of the cutter head assembly based on the identification part. The drive assembly may be disposed inside the main body and include an output shaft configured to be detachable from the cutter head assembly. The control board may be disposed inside the main body and is in communication with the drive assembly and the detection assembly. The control board is configured to determine the cutting type of the cutter head assembly based on the signal received from the detection assembly and to drive the cutter head assembly based on the cutting type of the cutter head assembly
The above and other objects, features and advantages of the present invention will become more apparent by a more detailed description of the preferred embodiments of the present invention illustrated in the accompanying drawings. The same reference numerals refer to the same parts throughout the drawings, and the drawings are not intentionally drawn to scale to actual size, the emphasis being on illustrating the gist of the present invention.
Among them, the main body 1; the cutter head assembly 2; the drive assembly 3; the output shaft 31; the identification part 4; the control board 5; the identification channel 6; the infrared transmitter 7; the photoelectric receiver 8; the outer shell 9; the waterproof inner shell 10; annular stepped surface 101; waterproof sealing cover 11; panel 111; surrounding annular side wall 112; annular protrusion 113; positioning post 114; threaded hole 115; spring mounting platform 116; battery 12; driving mechanism mounting seat 13; cylindrical sleeve 131; detection component PCB 14; receiving chamber 15; positioning slot 16; positioning pin 17; annular sealing ring 18; threaded fastener 19; metal spring piece 20; fastener 21; connection seat 22; double tank transmission part 23; linkage 24; waterproof seal 25.
In order to facilitate understanding of the present invention, it will be described more fully below with reference to the relevant drawings. It should be noted that when an element is referred to as “connected” or “coupled” to another element, it can be directly connected to and integral with the other element, or intervening elements may also be present. The terms “installation,” “one end,” “other end,” and similar expressions used herein are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the specification herein is for the purpose of describing specific embodiments only and is not intended to limit the invention. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
The present disclosure discloses an embodiment of a hair cutter 100. Refer to
In an exemplary embodiment, in order to facilitate the main body 1 to distinguish between cutter head assemblies 2 with different functions and control the output speed of the drive assembly 3 of the main body 1, the cutter head assembly includes an identification part 4 (best seen in
The drive assembly 3 includes an output shaft 31. The output shaft 31 (see
In a preferred embodiment, referring to
The detection assembly 32 includes an identification channel 6 (see
The detection component PCB 14 is in communication with the photoelectric receiver 8 and is configured to convert the photoelectric signal received by photoelectric receiver 8 to an analog signal and to transmit the analog signal (that is based on the received photoelectric signal (the second infrared light)) to the control board 5. The control board 5 is configured to identify the cutting type of the cutter head assembly 2 according to the received analog signal (that is based on the photoelectric signal), and is further configured to control (e.g., via a PWM signal) the drive assembly 3 output speed based on the cutting type of cutter head assembly 2. Since the material of the identification channel 6 is a material with high light transmittance, the infrared light emitted by the infrared transmitter 7 will not be blocked, and the detection result will not be affected. In an embodiment, the light transmittance of the material of the identification channel 6 must be more than 85%, for example, glass, polycarbonate (PC), plexiglass (PMMA), polyethylene terephthalate (PET), etc. Preferably plastic material may be used, which can reduce the overall weight of the hair cutter. Because the light transmittance of the light-transmitting plate 82 of the identification part 4 on each of the cutter head assemblies 2 is different, each cutter head assembly 2 has a unique cutting type/identity for the control board 5 to identify, and thus control the drive assembly 3 to output the corresponding optimal operating speed for that cutter head assembly 2 to improve the user experience.
The light transmittance of the light-transmitting plates 82 of different cutter head assemblies 2 has different ranges. When there are five cutter head assemblies 2 with different functions, the light transmittance range may be preset in the control board 5. For example, the light transmittance “range one” may be 0-less than 20%, which corresponds to the cutter head assembly 2 “component number one,” and the light transmittance “range two” may be 20%-less than 40%, which corresponds to the cutter head component assembly 2 “component number two,” and the light transmittance “range three” may be 40-less than 60%, which corresponds to the cutter head assembly 2 “component number three,” and the light transmittance “range four” may be 60%-less than 80%, which corresponds to the cutter head assembly 2 “component number four,” and the light transmittance “range five” may be 80%-99%, which corresponds to the cutter head assembly 2 “component number five.” When a cutter head assembly 2 is disposed on the main body 1, the light-transmitting plate 82 on it is inserted into the identification channel 6. As described in more detail above, at this time, the infrared transmitter 7 emits infrared light, and part of the light passes through the light-transmitting plate 82. After passing through the light-transmitting plate 82, it is received by the photoelectric receiver 8. The detection component PCB board 14 is configured to convert the infrared light signal received by the photoelectric receiver 8 into an analog signal, and to send the analog signal to the control board 5. The control board 5 is configured to compare the signal with multiple preset light transmittance ranges to confirm/identify the cutting type (e.g., in the previous example, the component number) of the connected cutter head assembly 2. The control board 5 is configured to convert the received analog signal into a pulse width modulated (PWM) signal transmitted to the drive assembly 3 to output a speed that matches the running speed of the cutter head assembly 2 to provide the user with better user experience.
In an embodiment, the wavelength of the infrared light emitted by the infrared transmitter 7 is 700 nanometers (nm)˜1500 nm. Since the material of the identification channel 6 is a material with high light transmittance (more than 85%), the identification channel 6 will not block the light emitted by the infrared transmitter 7. All the light is emitted to the light-transmitting plate 82, and because the light transmittance of the light-transmitting plates 82 on the cutter head assemblies 2 of different functions is different, it allows some wavelengths of infrared light according to the different light transmittances of the light-transmitting plate 82 to pass through to facilitate subsequent identification of the identity of the cutting type of cutter head assembly 2 based on light transmittance.
In a preferred embodiment, the infrared transmitter and the photoelectric receiver are about 2 mm˜about 8 mm apart, such as 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm or 8 mm, etc. to ensure that the photoelectric receiver can accurately receive the infrared light emitted by the infrared transmitter.
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In this application, unless otherwise expressly stated and limited, a first feature being “on” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. touch. Furthermore, the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. “Below”, “below” and “beneath” the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
In the description of this specification, reference to the description of the terms “preferred embodiment”, “yet another embodiment”, “other embodiments” or “specific examples” means that the specific features, structures, structures, etc. described in connection with the embodiment or example. Materials or features are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.
Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and cannot be understood as limitations of the present application. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present application. The embodiments are subject to changes, modifications, substitutions and variations.
In general the foregoing disclosure finds utility in providing a hair cutter in which a main body is adapted for use with multiple different cutter head assemblies with different functions, and can automatically determine and provide the required running speed associated with expected performance each of the different cutter head assemblies.
