A hair cutter

Abstract

The present application relates to the technical field of hair cutter, and discloses a hair cutter, which comprises a main body and a cutter head assembly detachably connected with the main body, wherein an identification member capable of identifying the type of the cutter head assembly is arranged on the cutter head assembly, and a detection assembly for identifying the identification member on the cutter head assembly is arranged on the main body; a driving mechanism for driving the cutter head assembly to operate and a circuit control board are arranged in the main body, the output shaft of the driving mechanism is detachably connected with the cutter head assembly, and the circuit control board is electrically connected with the driving mechanism and the detection assembly respectively. When the same main body is adapted to cutter head assemblies with different functions, the type of the cutter head assembly can be identified, and the output speed of the driving mechanism in the main body can be controlled to further control the operating speed of the cutter head assembly.

Description

Technical Field

[0001] This invention relates to the field of hair cutter technology, and particularly to a hair cutter with a blade assembly identification structure. Background Technology

[0002] A hair trimmer is a tool used for trimming hair. For example, it can be used to trim head hair, nose hair, long beard hair, or long underarm hair, as well as to trim shorter stubble. However, most hair trimmers on the market currently consist of a single main body with a fixed type of blade assembly. When users have different needs, they need to purchase multiple hair trimmers, which is not only inconvenient to carry but also increases their overall cost.

[0003] To address the aforementioned technical issues and meet market demands, the industry has developed a structure where a single main body can accommodate different functional blade assembly components. This involves a universal connection structure between the main body and multiple blade assemblies, allowing for detachable connection between the various blade assemblies and the same main body, reducing user costs and facilitating portability. However, because different functional blade assemblies require different operating speeds, and the same main body cannot adapt to these speed requirements, the user experience is unsatisfactory. Summary of the Invention

[0004] The present invention aims to solve the technical problem in the prior art that when a single body is adapted to multiple cutter head components with different functions, it cannot make adaptive adjustments according to the required operating speed of the different cutter head components. The invention provides a hair cutter with a cutter head component identification structure, so that when the same body is adapted to multiple cutter head components with different functions, it can identify the type of cutter head component and control the output speed of its internal drive mechanism, so as to further control the operating speed of the cutter head component.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solutions:

[0006] The hair cutter of the present invention includes a main body and a blade assembly detachably mounted to the main body. The blade assembly is provided with an identification element that can identify the type of the blade assembly. The main body is provided with a detection component for identifying the identification element on the blade assembly. A drive mechanism for driving the blade assembly and a circuit control board are provided inside the main body. The output shaft of the drive mechanism is detachably connected to the blade assembly. The circuit control board is electrically connected to the drive mechanism and the detection component respectively.

[0007] The blade assembly identification structure described in this invention allows for the configuration of multiple blade assemblies with different functions on a single main body. This enables the main body to be suitable for trimming hair, nose hair, long beards, or long armpit hair, as well as shorter stubble. Since each blade assembly has a unique identifier, after the blade assembly is connected to the main body, the detection component inside the main body feeds back the detected signal to the circuit control board. The circuit control board identifies the corresponding blade assembly based on the detection signal and then controls the output speed of the drive mechanism to achieve the optimal operating speed of the blade assembly, thus improving the user experience.

[0008] Furthermore, the identification element is a light-transmitting plate connected to the side of the cutter head assembly facing the main body. The light transmittance of the light-transmitting plates on cutter head assemblies with different functions is different. The detection component includes an identification element insertion slot set inside the main body and having only one opening. The identification element insertion slot is made of a high light transmittance material. An infrared emitter is set on one side wall of the identification element insertion slot, and a photoelectric receiver is set on the other side wall. When the cutter head assembly is connected to the main body, the light-transmitting plate on the cutter head assembly passes through the main body and is inserted into the identification element insertion slot through the opening. The infrared emitter emits infrared light, which passes through the slot wall and the light-transmitting plate of the identification element insertion slot and is received by the photoelectric receiver. The photoelectric receiver feeds back the received photoelectric signal to the circuit control board. The circuit control board identifies the type of cutter head assembly based on the photoelectric signal and controls the output speed of the drive mechanism.

[0009] Furthermore, the infrared transmitter and the photoelectric receiver are spaced 2mm to 8mm apart.

[0010] Furthermore, the light transmittance of the material of the identification insertion slot is above 85%.

[0011] Furthermore, the main body includes an outer shell and a waterproof inner shell disposed inside the outer shell. A waterproof sealing cover is sealed at the port of the waterproof inner shell, and the waterproof inner shell and the waterproof sealing cover cooperate to form a sealed cavity. The identification insert slot is disposed on the waterproof sealing cover, with its slot body extending into the sealed cavity and its opening located on the panel of the waterproof sealing cover. The light-transmitting plate of the blade assembly penetrates the outer shell of the main body and is inserted into the identification insert slot on the waterproof sealing cover.

[0012] Furthermore, a drive mechanism mounting base is provided in the sealed cavity, and a detection component PCB board is provided on the drive mechanism mounting base. The infrared transmitter and photoelectric receiver are electrically connected to the detection component PCB board through pins, and the detection component PCB board is electrically connected to the circuit control board.

[0013] Furthermore, a receiving groove is provided on the side of the drive mechanism mounting base facing the waterproof sealing cover. The detection component PCB board is located at the opening of the receiving groove, and the pins of the infrared transmitter and photoelectric receiver extend into the receiving groove after passing through the detection component PCB board.

[0014] Furthermore, the receiving slot is equipped with a partition to separate the pins of the infrared transmitter and the pins of the photoelectric receiver into two different spaces.

[0015] Furthermore, a positioning slot facing the cutter head assembly is provided on the waterproof sealing cover, and a positioning pin is provided on the cutter head assembly. After the cutter head assembly is connected to the main body of the machine, the positioning pin passes through the outer shell and is inserted into the positioning slot on the waterproof sealing cover.

[0016] Furthermore, an annular limiting protrusion is provided on the outer wall of the waterproof sealing cover. An annular groove is also provided between the annular limiting protrusion and the cover opening and on the outer wall. An annular sealing ring is provided in the annular groove. The side wall of the waterproof sealing cover is inserted through the port of the waterproof inner shell, and the annular sealing ring in the annular groove is pressed against the side wall of the waterproof inner shell. When the waterproof sealing cover is installed in place, the annular limiting protrusion on it abuts against the port plane of the waterproof inner shell.

[0017] Furthermore, a positioning post is provided on the waterproof sealing cover, and a positioning hole is provided inside the outer shell. When the waterproof sealing cover is installed in place, the positioning post is inserted into the positioning hole; and / or a threaded hole is provided on the side of the waterproof sealing cover facing the sealing cavity, and a countersunk hole is provided on the drive mechanism mounting base opposite to the threaded hole. The threaded fastener passes through the countersunk hole and is screwed into the corresponding threaded hole, connecting the drive mechanism mounting base and the waterproof sealing cover as a whole.

[0018] Furthermore, a spring mounting platform is provided on the waterproof sealing cover, on which a metal spring is installed. The metal spring has an assembly hole, and a buckle is provided on the cutter head assembly. When the cutter head assembly is installed on the machine body, the buckle on the cutter head assembly engages with the assembly hole on the metal spring.

[0019] Furthermore, a columnar sleeve is provided on the drive mechanism mounting base, and the drive mechanism is mounted on the drive mechanism mounting base. The output shaft of the drive mechanism passes through the columnar sleeve and the waterproof sealing cover of the drive mechanism mounting base in sequence and extends to the outside of the sealing cavity. A double-groove transmission component is sleeved on the free end of the output shaft of the drive mechanism. One groove of the double-groove transmission component is sleeved on the free end of the output shaft of the drive mechanism, and the other groove is sleeved on the linkage component of the cutter head assembly.

[0020] Furthermore, a stepped waterproof seal is provided between the columnar sleeve and the waterproof sealing cover. The waterproof seal is pressed tightly onto the columnar sleeve by the waterproof sealing cover, and the waterproof seal is wrapped around the side wall of the output shaft of the drive mechanism.

[0021] Furthermore, a double-groove transmission component is sleeved on the free end of the output shaft of the drive mechanism. The double-groove transmission component includes a first groove and a second groove. The openings of the first groove and the second groove are arranged opposite to each other, and the center lines of the first groove and the second groove coincide along the length direction. The second groove is sleeved on the output shaft of the drive mechanism, while the first groove is detachably sleeved on the linkage component of the cutter head assembly.

[0022] Furthermore, the linkage includes a first connecting portion that is connected to the double-groove transmission component;

[0023] The first connecting part is square, and the shape of the first groove on the double groove transmission component matches the shape of the first connecting part. The joint between the surfaces of the first groove and the joint between the surfaces of the first connecting part are both arc-shaped.

[0024] And / or the linkage includes a second connecting part, the second connecting part being cylindrical, with a plurality of protruding connecting posts spaced circumferentially on the second connecting part, the head diameter of the connecting post being smaller than its root diameter, the hair cutter also includes a connector, with a plurality of collars spaced in a circular array at the bottom of the connector, the number of collars being the same as the number of connecting posts, the connector being connected to the second connecting part of the linkage by sleeves on the connecting posts through the collars, and a conversion head connected to the transmission component of the cutter head assembly being provided at the top of the connector, the conversion head converting the rotational motion output by the drive mechanism into the direction of movement required for the operation of the cutter head assembly. Attached Figure Description

[0025] The above and other objects, features, and advantages of the invention will become clearer through a more detailed description of the preferred embodiments illustrated in the accompanying drawings. The same reference numerals denote the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of the invention.

[0026] Figure 1 This is a partial cross-sectional view of the present invention.

[0027] Figure 2 This is an exploded structural diagram of the present invention.

[0028] Figure 3 This is an exploded structural diagram of the main body and the cutter head assembly.

[0029] Figure 4 This is a schematic diagram of the cutter head assembly for one of its functions.

[0030] Figure 5 This is a three-dimensional view of the waterproof sealing cap from below.

[0031] Figure 6 This is a schematic diagram of the installation structure of the metal spring and the clip.

[0032] Figure 7 This is a schematic diagram of a double-groove transmission component in different directions.

[0033] Figure 8 This is a schematic diagram of the linkage structure.

[0034] Figure 9 This is a schematic diagram of the first embodiment of the connector.

[0035] Figure 10 This is a schematic diagram of the second embodiment of the connector.

[0036] Figure 11 This is a schematic diagram of the connection structure of the double-groove transmission component, linkage component, connecting component, and linear motion cutter head assembly.

[0037] Figure 12 This is a schematic diagram of the connection structure of the double-groove transmission component, linkage component, connecting component, and rotary cutting head assembly.

[0038] Figure 13 This is a schematic diagram of the structure in which the connector mates with the support plate.

[0039] The components include: 1. Main body; 2. Cutter head assembly; 3. Drive mechanism; 31. Output shaft; 4. Identifier; 5. Circuit control board; 6. Identifier insertion slot; 7. Infrared transmitter; 8. Photoelectric receiver; 9. Outer shell; 10. Waterproof inner shell; 10. Annular stepped surface; 11. Waterproof sealing cover; 11. Panel; 111. Enclosure; 112. Annular limiting protrusion; 113. Positioning post; 114. Threaded hole; 115. Spring mounting platform; 116. Battery; 12. Drive mechanism mounting base; 13. Columnar sleeve; 131. Detection component PCB board; 14. Receiving slot. 15; Positioning slot; 16; Positioning pin; 17; Annular sealing ring; 18; Threaded fastener; 19; Metal spring; 20; Buckle; 21; Connecting seat; 22; Double groove transmission component; 23; Inclined surface; 231; Linkage component; 24; First connecting part; 241; Second connecting part; 242; Connecting column; 243; Waterproof seal; 25; Connecting component; 26; Collar; 261; Converter head; 262; Mounting platform; 263; Eccentric shaft; 264; Gear; 265; Side wall; 266; Transmission assembly; 27; Transmission gear; 28; Support plate; 29. Detailed Implementation

[0040] To facilitate understanding of the present invention, a more comprehensive description will be given below with reference to the accompanying drawings.

[0041] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0042] 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 this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] This invention provides a specific embodiment of a hair cutter, see [link to embodiment]. Figures 1 to 3 The device includes a main body 1 and a blade assembly 2 that is detachably assembled with the main body 1. To achieve multiple uses, a main body 1 can be combined with multiple blade assemblies 2 with different functions. The main body 1 and the blade assembly 2 have a universal connection structure, which facilitates the normal assembly of the main body 1 with each blade assembly 2 used in combination and drives each blade assembly 2 to work normally. This is prior art and is not the inventive point of this invention. When multiple blade assemblies 2 are provided, each blade assembly 2 has different functions, such as haircutting, trimming nose hair, shaving beard, shaving armpit hair, etc.

[0044] In this embodiment, to facilitate the main body 1 in recognizing different functional cutter head assemblies 2 and thus controlling the output speed of the drive mechanism 3, an identification element 4 that can identify the type of cutter head assembly can be provided on the cutter head assembly 2, and a detection component for identifying the identification element 4 on the cutter head assembly 2 is provided on the main body 1. A drive mechanism 3 and a circuit control board 5 for driving the cutter head assembly 2 are provided inside the main body 1. The output shaft 31 of the drive mechanism 3 is detachably connected to the cutter head assembly 2, and the circuit control board 5 is electrically connected to the drive mechanism 3 and the detection component respectively. The detachable connection between the output shaft 31 of the drive mechanism 3 and the cutter head assembly 2 is part of the common connection structure between the cutter head assembly 2 and the main body 1, and is also prior art, not the inventive point of this invention. The circuit control board 5 is prior art, and its circuit connection structure with the drive mechanism 3 and the detection component is also prior art. The drive mechanism 3 can be a motor or motor capable of forward and reverse rotation, such as a brushless motor, with an output speed of 2000rpm-6500rpm.

[0045] In the preferred embodiment, see Figures 1 to 4The identification element 4 is a light-transmitting plate connected to the side of the cutter head assembly 2 facing the main body 1. The light transmittance of the light-transmitting plates on different cutter head assemblies 2 is different. The detection component includes an identification element insertion slot 6 set inside the main body 1 and having only one opening. The identification element insertion slot 6 can be U-shaped and is made of a high light transmittance material. An infrared emitter 7 is set on one side wall of the identification element insertion slot 6, and a photoelectric receiver 8 is set on the other side wall. When the cutter head assembly 2 is connected to the main body 1, the light-transmitting plate on the cutter head assembly 2 passes through the main body 1 and is inserted into the identification element insertion slot 6 through the opening. The infrared emitter 7 emits infrared light, which passes through the slot wall and the light-transmitting plate of the identification element insertion slot 6 and is received by the photoelectric receiver 8. The photoelectric receiver 8 feeds back the received photoelectric signal to the circuit control board 5. The circuit control board 5 identifies the type of cutter head assembly 2 according to the photoelectric signal and controls the output speed of the drive mechanism 3. Since the material of the identification insert slot 6 is a high-transmittance material, it will not block the infrared light emitted by the infrared emitter 7, and thus will not affect the detection results. The transmittance of the material of the identification insert slot 6 should be above 85%, such as glass, polycarbonate (PC), plexiglass (PMMA), polyethylene terephthalate (PET), etc. Plastic material is preferred, which can reduce the overall weight of the hair cutter. The transmittance of the light-transmitting plates on different blade assembly 2 is different, so that each blade assembly 2 has a unique identity for the circuit control board 5 to identify and control the drive mechanism 3 to output the corresponding optimal running speed, thereby increasing the user experience.

[0046] The light transmittance of the light-transmitting plates on the cutter head assemblies 2 with different functions has different ranges. When there are five cutter head assemblies 2 with different functions, the light transmittance range of the light-transmitting plates on the five cutter head assemblies 2 with different functions is preset in the circuit control board 5. For example, the light transmittance range one is 0~20%, corresponding to cutter head assembly number one; the light transmittance range two is 20%~40%, corresponding to cutter head assembly number two; the light transmittance range three is 40~60%, corresponding to cutter head assembly number three; the light transmittance range four is 60%~80%, corresponding to cutter head assembly number four; and the light transmittance range five is 80%~99%, corresponding to cutter head assembly number five. When a blade assembly 2 is inserted into the main body 1, its light-transmitting plate is inserted into the identification slot 6. At this time, the infrared emitter 7 emits infrared light, and some of the light passes through the light-transmitting plate and is received by the photoelectric receiver 8. The photoelectric receiver 8 converts the received infrared light signal into an analog signal and sends the analog signal to the circuit control board 5. The circuit control board 5 compares the received analog signal with multiple preset light transmittance ranges to confirm the number of the connected blade assembly 2. Then, it controls the drive mechanism 3 to output a speed that matches the running speed of the blade assembly 2 to provide the user with a better user experience. The infrared light emitted by the infrared emitter 7 has a wavelength of 700nm~1500nm. Since the material of the identification insert slot 6 is a high light transmittance material, the light emitted by the infrared emitter 7 will not be blocked by the slot wall of the identification insert slot 6 and will be emitted onto the light-transmitting plate. Since the light transmittance of the light-transmitting plates on the different functions of the cutter head assembly 2 is different, it allows some wavelengths of infrared light to pass through according to the different light transmittance of the light-transmitting plate, so as to facilitate the identification of the cutter head assembly 2 according to the light transmittance.

[0047] In a preferred embodiment, the infrared transmitter and the photoelectric receiver are spaced 2mm to 8mm apart, such as 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, or 8mm, to ensure that the photoelectric receiver can accurately receive the infrared light emitted by the infrared transmitter and ensure the accuracy of the detection.

[0048] In the preferred embodiment, see Figure 1 and Figure 2The main body 1 includes an outer shell 9 and a waterproof inner shell 10 disposed inside the outer shell 9. A waterproof sealing cover 11 is sealed at the port of the waterproof inner shell 10. The waterproof inner shell 10 and the waterproof sealing cover 11 cooperate to form a sealed cavity. The identification insert slot 6 is disposed on the waterproof sealing cover 11, with its slot extending into the sealed cavity and its opening located on the panel 111 of the waterproof sealing cover 11. The light-transmitting plate of the blade assembly 2 penetrates the outer shell 9 of the main body 1 and is inserted into the identification insert slot 6 on the waterproof sealing cover 11. By providing a waterproof inner shell 10 and a waterproof sealing cover 11 that is sealed to the waterproof inner shell 10, damage to electronic components such as the drive mechanism 3, circuit control board 5, infrared transmitter 7, photoelectric receiver 8, and battery 12 in the sealed cavity is prevented when external liquid enters the body 1. The outer shell 9 has a through hole at one end facing the blade assembly 2, allowing for detachable connection between the blade assembly 2 and the body 1. The through hole exposes the panel 111 of the waterproof sealing cover 11, allowing the opening of the identification insert slot 6 to be exposed, facilitating the insertion of a light-transmitting plate into the slot. The identification insert slot 6 and the waterproof sealing cover 11 can be integrally formed, increasing the overall strength of the waterproof sealing cover 11. Alternatively, a separate connection can be used, in which case a through hole needs to be provided on the panel 111 of the waterproof sealing cover 11 to facilitate identification. The opening of the identification insert slot 6 is aligned with the through hole on the panel 111 of the waterproof sealing cover 11. The identification insert slot 6 is fastened to the bottom of the panel 111 of the waterproof sealing cover 11 by adhesive or other fasteners. Since the identification insert slot 6 has only one opening and its bottom and side walls are closed, its slot body is not connected to the sealing cavity. This ensures that the light-transmitting plate can be accommodated while also ensuring good waterproof performance inside the sealing cavity. The waterproof sealing cover 11 includes a panel 111 and a surrounding wall 112 provided at the edge of the panel 111. When the waterproof sealing cover 11 is closed at the port of the waterproof inner shell 10, the surrounding wall 112 of the waterproof sealing cover 11 is inserted into the waterproof inner shell 10 and fits tightly against the inner wall of the waterproof inner shell 10. A through hole is provided on the panel 111 of the waterproof sealing cover 11, which is opposite to the through hole on the outer shell 9, so that the output shaft 31 of the drive mechanism 3 in the sealing cavity can extend to the outside of the sealing cavity.

[0049] In the preferred embodiment, see Figure 1 , Figure 2 and Figure 5A drive mechanism mounting base 13 is provided in the sealed cavity, and a detection component PCB board 14 is provided on the drive mechanism mounting base 13. The infrared transmitter 7 and the photoelectric receiver 8 are electrically connected to the detection component PCB board 14 through pins. The detection component PCB board 14 is electrically connected to the circuit control board 5. The circuit connection structure between the detection component PCB board 14 and the infrared transmitter 7 and the photoelectric receiver 8, as well as the electrical connection structure between the detection component PCB board 14 and the circuit control board 5, are all prior art. The circuit control board 5, the detection components (including the infrared transmitter 7 and the photoelectric receiver 8), and the drive mechanism 3 are also electrically connected to the power module. The circuit connection structure between the circuit control board 5, the detection components (including the infrared transmitter 7 and the photoelectric receiver 8), and the drive mechanism 3 and the power module is prior art. The power module can be a battery 12 or a power interface. An annular stepped surface 101 is provided on the inner wall of the waterproof inner shell 10 on one side of the port. The drive mechanism mounting seat 13 is placed on the annular stepped surface 101. After the waterproof sealing cover 11 is closed, the end face of the surrounding wall 112 of the waterproof sealing cover 11 abuts against the drive mechanism mounting seat 13 to press the drive mechanism mounting seat 13 against the annular stepped surface 101 of the waterproof inner shell 10.

[0050] In the preferred embodiment, see Figure 1 and Figure 2 A receiving groove 15 is provided on the side of the drive mechanism mounting base 13 facing the waterproof sealing cover 11. The detection component PCB board 14 is located at the opening of the receiving groove 15. The pins of the infrared transmitter 7 and the photoelectric receiver 8 extend into the receiving groove 15 after passing through the detection component PCB board 14. By providing the receiving groove 15, a certain mounting height is provided for the detection component PCB board 14, thereby providing mounting space for the pins.

[0051] In the preferred embodiment, see Figure 2 The receiving slot 15 has a partition inside, which separates the pins of the infrared transmitter 7 and the pins of the photoelectric receiver 8 into two different spaces to avoid electrical interference between the pins of the infrared transmitter 7 and the pins of the photoelectric receiver 8.

[0052] In the preferred embodiment, see Figure 2 and Figure 4 A positioning slot 16 facing the cutter head assembly 2 is provided on the waterproof sealing cover 11, and a positioning pin 17 is provided on the cutter head assembly 2. After the cutter head assembly 2 is connected to the main body 1, the positioning pin 17 passes through the outer shell 9 and is inserted into the positioning slot 16 on the waterproof sealing cover 11. The quick connection between the cutter head assembly 2 and the main body 1 is achieved through the cooperation of the positioning pin 17 and the positioning slot 16.

[0053] In the preferred embodiment, see Figure 1 and Figure 2An annular limiting protrusion 113 is provided on the outer wall of the waterproof sealing cover 11. An annular groove is also provided between the annular limiting protrusion 113 and the cover opening and on the outer wall. An annular sealing ring 18 is provided in the annular groove. The side wall of the waterproof sealing cover 11 is inserted through the port of the waterproof inner shell 10, and the annular sealing ring 18 in the annular groove is pressed against the side wall of the waterproof inner shell 10. When the waterproof sealing cover 11 is installed in place, the annular limiting protrusion 113 on it abuts against the port plane of the waterproof inner shell 10. Specifically, the annular limiting protrusion 113 and the annular groove are both provided on the surrounding wall 112 of the waterproof sealing cover 11. When the annular sealing ring 18 is installed in the annular groove, it is only partially embedded in the annular groove, while part of it is located outside the annular groove. When the waterproof sealing cover 11 is closed on the port of the waterproof inner shell 10, the surrounding wall 112 of the waterproof sealing cover 11, with the annular sealing ring 18 on it, is inserted into the interior of the waterproof inner shell 10. Through the combined action of the surrounding wall 112 of the waterproof sealing cover 11 and the inner wall of the waterproof inner shell 10, the annular sealing ring 18 is squeezed. The deformation of the annular sealing ring 18 seals the assembly surface between the waterproof sealing cover 11 and the waterproof inner shell 10, preventing external liquid from entering the sealing cavity. When the lower surface of the annular limiting protrusion 113 abuts against the port plane of the waterproof inner shell 10, it indicates that the waterproof sealing cover 11 is properly assembled.

[0054] In the preferred embodiment, see Figure 1 and Figure 2 A positioning post 114 is provided on the waterproof sealing cover 11, and a positioning hole is provided inside the outer shell 9. When the waterproof sealing cover 11 is installed in place, the positioning post 114 is inserted into the positioning hole. Specifically, the positioning post 114 is provided on the panel 111 of the waterproof sealing cover 11. Through the cooperation of the positioning post 114 and the positioning hole, the outer shell 9, the waterproof inner shell 10, and the waterproof sealing cover 11 can be quickly assembled. A threaded hole 115 is provided on the side of the waterproof sealing cover 11 facing the sealing cavity. A countersunk hole opposite to the threaded hole 115 is provided on the drive mechanism mounting base 13. The threaded fastener 19 passes through the countersunk hole and is screwed into the corresponding threaded hole 115, connecting the drive mechanism mounting base 13 and the waterproof sealing cover 11 as a whole. The threaded hole 115 does not penetrate the waterproof sealing cover 11 to ensure the sealing performance of the waterproof sealing cover 11.

[0055] In the preferred embodiment, see Figure 1 , Figure 2 , Figure 4 as well as Figure 6 A spring mounting platform 116 is also provided on the waterproof sealing cover 11, and a metal spring 20 is installed on the spring mounting platform 116. The metal spring 20 is provided with an assembly hole, and a buckle 21 is provided on the cutter head assembly 2. When the cutter head assembly 2 is installed on the machine body 1, the buckle 21 on the cutter head assembly 2 engages with the assembly hole on the metal spring 20. This enables the cutter head assembly 2 to be detachably connected to the machine body 1.

[0056] In this embodiment, see Figure 1 and Figure 4 The aforementioned identification element 4, positioning pin 17, and buckle 21 are all spaced apart on a connecting seat 22. The connecting seat 22 is located on the side of the cutter head assembly 2 facing the machine body 1, and the connecting seat 22 is provided with anti-interference through holes for the double-groove transmission component 23 connected to the output shaft 31 of the drive mechanism 3 to pass through. By placing the identification element 4, positioning pin 17, and buckle 21 on the same connecting seat 22, it is convenient to assemble and install the whole assembly.

[0057] In the preferred embodiment, see Figure 1 and Figure 2 The drive mechanism mounting base 13 is provided with a columnar sleeve 131, and the drive mechanism 3 is mounted on the drive mechanism mounting base 13. The output shaft 31 of the drive mechanism 3 passes through the columnar sleeve 131 and the waterproof sealing cover 11 of the drive mechanism mounting base 13 in sequence and extends to the outside of the sealing cavity. The columnar sleeve 131 and the drive mechanism mounting base 13 can be integrally formed or separately formed and then connected into one piece by fasteners. A double-groove transmission component 23 is sleeved on the free end of the output shaft 31 of the drive mechanism 3. One groove of the double-groove transmission component 23 is sleeved on the free end of the output shaft 31 of the drive mechanism 3, and the other groove is sleeved on the linkage component 24 of the cutter head assembly 2. When the output shaft 31 of the drive mechanism 3 rotates, it drives the double-groove transmission component 23 to rotate, thereby driving the linkage component 24 to rotate, so as to further drive the corresponding moving blade in the cutter head assembly 2 to run.

[0058] In the preferred embodiment, see Figure 1 A stepped waterproof seal 25 is provided between the columnar sleeve 131 and the waterproof sealing cover 11. The waterproof seal 25 is pressed tightly onto the columnar sleeve 131 by the waterproof sealing cover 11, and the waterproof seal 25 wraps around the side wall of the output shaft 31 of the drive mechanism 3. Specifically, the outer side wall of the columnar sleeve 131 is stepped, and one of the stepped surfaces is opposite to the panel 111 of the waterproof sealing cover 11. The shape of the waterproof seal 25 matches the shape of the outer side wall of the columnar sleeve 131. After the waterproof sealing cover 11 and the drive mechanism mounting base 13 are assembled, the panel 111 of the waterproof sealing cover 11 presses the waterproof seal 25 against the stepped surface of the columnar sleeve 131, and the waterproof seal 25 seals the assembly surface between the stepped surfaces of the waterproof sealing cover 11 and the columnar sleeve 131, effectively preventing external liquid from entering the sealed cavity.

[0059] See Figure 7In this embodiment, a double-groove transmission component 23 is sleeved on the free end of the output shaft of the drive mechanism 3. The double-groove transmission component 23 includes a first groove and a second groove. The openings of the first groove and the second groove are arranged opposite to each other, so that the double-groove transmission component 23 can serve as an intermediate transmission component to output the power of the drive mechanism to the cutter head assembly 2. The center lines of the first groove and the second groove coincide along the length direction. The second groove is sleeved on the output shaft of the drive mechanism 3, and the first groove is detachably sleeved on the linkage component 24 of the cutter head assembly 2.

[0060] See Figure 7 and Figure 8 In this embodiment, the linkage 24 includes a first connecting part 241 connected to the double-groove transmission member 23. That is, the linkage 24 cooperates with the first groove on the double-groove transmission member 23 through the first connecting part 241 to realize the transmission of motion. The first connecting part 241 is square, and the shape of the first groove on the double-groove transmission member 23 matches the shape of the first connecting part 241, that is, the shape of the first groove is also square. The double-groove transmission member 23 has a connecting inclined surface 231 from one end face of the first groove to the opening of the first groove. The joint between the surfaces of the first groove and the joint between the surfaces of the first connecting part 241 are both arc-shaped. By connecting and transmitting power between the square first groove and the square first connecting part 241, it is not only convenient to detachably connect the linkage 24 and the double-groove transmission member 23, but also to make the transmission of force more stable.

[0061] See Figures 9 to 12 In this embodiment, the linkage 24 includes a second connecting portion 242, one end of which is connected to the first connecting portion 241. The second connecting portion 242 is cylindrical, and a plurality of protruding connecting posts 243 are arranged circumferentially on the second connecting portion 242. The connecting posts 243 protrude outward from the sidewall of the second connecting portion 242 and are used to engage with the connector 26. The diameter of the head of the connecting post 243 is smaller than the diameter of its root, which can increase the flexibility of the blade assembly's swing. The hair cutter also includes a connector 26. Multiple collars 261 are arranged in a circular array at intervals at the bottom. The number of collars 261 is the same as the number of connecting posts 243. The connecting member 26 is connected to the second connecting part 242 of the linkage member 24 by sleeve of the collars 261 and the connecting posts 243. The connecting post 243 has a first plane facing the cutter head assembly 2 and a second arc-shaped surface located below the first plane and forming a three-dimensional shape with the first plane. Specifically, the connecting post 243 can be a semi-cylindrical structure or a semi-conical structure to avoid affecting the compression stroke of the cutter head assembly during operation. In addition, adjacent collars 261 are connected by sidewalls 266 to improve the overall strength of the collars 261 and ensure reliable and stable motion transmission.

[0062] In this embodiment, see Figures 9 to 12A conversion head 262, connected to the transmission component of the cutter head assembly 2, is provided on the top of the connector 26. The conversion head 262 converts the rotational motion output by the drive mechanism 3 into the direction of movement required for the cutter head assembly 2 to run. Specifically, when the blade of the cutter head assembly 2 moves in a straight line to cut hair, the conversion head 262 converts the rotational motion output by the drive mechanism 3 into a straight line motion; when the blade of the cutter head assembly 2 rotates to cut hair, the conversion head 262 maintains the rotational motion output by the drive mechanism 3. The conversion head 262 has multiple implementations. This invention provides two specific implementations, but is not limited to these two specific implementations. For the first implementation, see [link to implementation details]. Figure 9 , Figure 11 and Figure 13 The converter head 262 includes a mounting platform 263 located on top of the connector 26. An eccentric shaft 264 is connected to the top surface of the mounting platform 263. The eccentric shaft 264 is defined as a shaft whose axis does not coincide with the vertical centerline of the mounting platform; that is, the axis of the shaft deviates from the vertical centerline of the mounting platform. The eccentric shaft 264 is connected to a transmission assembly 27 that drives the blades within the cutter head assembly 2. Rotation of the eccentric shaft 264 enables the blades in the cutter head assembly 2 to perform linear reciprocating motion. Furthermore, the mounting platform 263 is not only used to connect to the eccentric shaft 264 but also to cooperate with the support plate 29 to limit the movement of the mounting platform 263. For the second embodiment, see [link to second embodiment]. Figure 10 and Figure 12 The conversion head 262 includes a gear 265 located on the upper part of the connector 26. The gear 265 meshes with multiple transmission gears 28 (in this embodiment, there are three transmission gears 28, each of which drives a blade to rotate) in the transmission assembly that drives the blade in the cutter head assembly 2. The blade in the cutter head assembly 2 rotates by the rotation of the gear 265.

[0063] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0064] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A hair cutter, comprising a main body (1) and a blade assembly (2) detachably mounted and detachably fitted with the main body (1), characterized in that: The cutter head assembly (2) is provided with an identification element (4) that can identify the type of the cutter head assembly (2). The hair cutter also includes a connecting seat (22), which is located on the side of the cutter head assembly (2) facing the main body (1). The identification element (4) is located on the connecting seat (22). The main body (1) is provided with a detection component for identifying the identification element (4) on the cutter head assembly (2). The main body (1) is provided with a drive mechanism (3) and a circuit control board (5) for driving the cutter head assembly (2). The output shaft (31) of the drive mechanism (3) is detachably connected to the cutter head assembly (2). The circuit control board (5) is connected to the drive mechanism (3) and the detection component circuit respectively. The identification element (4) is a light-transmitting plate connected to the side of the cutter head assembly (2) facing the main body (1). The light transmission of the light-transmitting plates on the cutter head assemblies (2) with different functions is different. Different rates; the detection component includes an identification insert slot (6) with only one opening inside the main body (1). The material of the identification insert slot (6) is a high light transmittance material. An infrared emitter (7) is provided on one side wall of the identification insert slot (6), and a photoelectric receiver (8) is provided on the other side wall. When the cutter head assembly (2) is connected to the main body (1), the light-transmitting plate on the cutter head assembly (2) passes through the main body (1) and is inserted into the identification insert slot (6) through the opening of the identification insert slot (6). The infrared emitter (7) emits infrared light. The infrared light passes through the slot wall and the light-transmitting plate of the identification insert slot (6) and is received by the photoelectric receiver (8). The photoelectric receiver (8) feeds back the received photoelectric signal to the circuit control board (5). The circuit control board (5) identifies the type of the cutter head assembly (2) according to the photoelectric signal and controls the output speed of the drive mechanism (3).

2. The hair cutter according to claim 1, characterized in that: The infrared transmitter (7) and the photoelectric receiver (8) are 2mm to 8mm apart; And / or the light transmittance of the material of the identification insert slot (6) is above 85%.

3. The hair cutter according to claim 1 or 2, characterized in that: The main body (1) includes an outer shell (9) and a waterproof inner shell (10) disposed inside the outer shell (9). A waterproof sealing cover (11) is sealed at the port of the waterproof inner shell (10). The waterproof inner shell (10) and the waterproof sealing cover (11) cooperate to form a sealed cavity. The identification insert slot (6) is disposed on the waterproof sealing cover (11), and its slot body extends into the sealed cavity. Its opening is located on the panel of the waterproof sealing cover (11). The light-transmitting plate of the blade assembly (2) penetrates the outer shell (9) of the main body (1) and is inserted into the identification insert slot (6) on the waterproof sealing cover (11).

4. The hair cutter according to claim 3, characterized in that: A drive mechanism mounting base (13) is provided in the sealed cavity, and a detection component PCB board (14) is provided on the drive mechanism mounting base (13). The infrared transmitter (7) and the photoelectric receiver (8) are electrically connected to the detection component PCB board (14) through pins, and the detection component PCB board (14) is electrically connected to the circuit control board (5).

5. The hair cutter according to claim 4, characterized in that: A receiving groove (15) is provided on the side of the drive mechanism mounting base (13) facing the waterproof sealing cover (11). The detection component PCB board (14) is located at the opening of the receiving groove (15). The pins of the infrared transmitter (7) and the photoelectric receiver (8) extend into the receiving groove (15) after passing through the detection component PCB board (14). A partition is provided inside the receiving groove (15) to separate the pins of the infrared transmitter (7) and the pins of the photoelectric receiver (8) into two different spaces.

6. The hair cutter according to claim 4, characterized in that: A positioning slot (16) facing the cutter head assembly (2) is provided on the waterproof sealing cover (11), and a positioning pin (17) is provided on the cutter head assembly (2). After the cutter head assembly (2) is connected to the main body (1) as a whole, the positioning pin (17) passes through the outer shell (9) and is inserted into the positioning slot (16) on the waterproof sealing cover (11). And / or a positioning post (114) is provided on the waterproof sealing cover (11), and a positioning hole is provided inside the outer shell (9). When the waterproof sealing cover (11) is installed in place, the positioning post (114) is inserted into the positioning hole; A threaded hole (115) is provided on the side of the waterproof sealing cover (11) facing the sealing cavity, and a countersunk hole opposite to the threaded hole (115) is provided on the drive mechanism mounting base (13). The threaded fastener (19) passes through the countersunk hole and is screwed into the corresponding threaded hole (115) to connect the drive mechanism mounting base (13) and the waterproof sealing cover (11) into one unit.

7. The hair cutter according to claim 4, characterized in that: An annular limiting protrusion (113) is provided on the outer side wall of the waterproof sealing cover (11). An annular groove is provided between the annular limiting protrusion (113) and the opening of the waterproof sealing cover (11) and on the outer side wall. An annular sealing ring (18) is provided in the annular groove. The side wall of the waterproof sealing cover (11) is inserted through the port of the waterproof inner shell (10), and the annular sealing ring (18) in the annular groove is pressed against the side wall of the waterproof inner shell (10). When the waterproof sealing cover (11) is installed in place, the annular limiting protrusion (113) on it abuts against the port plane of the waterproof inner shell (10). And / or a spring plate mounting platform (116) is also provided on the waterproof sealing cover (11), a metal spring plate (20) is installed on the spring plate mounting platform (116), an assembly hole is provided on the metal spring plate (20), and a buckle (21) is provided on the cutter head assembly (2); when the cutter head assembly (2) is installed on the main body (1), the buckle (21) on the cutter head assembly (2) is engaged in the assembly hole on the metal spring plate (20).

8. The hair cutter according to claim 4 or 5, characterized in that: A columnar sleeve (131) is provided on the drive mechanism mounting base (13), and the drive mechanism (3) is installed on the drive mechanism mounting base (13). The output shaft (31) of the drive mechanism (3) passes through the columnar sleeve (131) and the waterproof sealing cover (11) of the drive mechanism mounting base (13) in sequence and extends to the outside of the sealing cavity. A double groove transmission component (23) is sleeved on the free end of the output shaft (31) of the drive mechanism (3). One groove of the double groove transmission component (23) is sleeved on the free end of the output shaft (31) of the drive mechanism (3), and the other groove is sleeved on the linkage component (24) of the cutter head assembly (2).

9. The hair cutter according to claim 8, characterized in that: A stepped waterproof seal (25) is provided between the columnar sleeve (131) and the waterproof sealing cover (11). The waterproof seal (25) is pressed onto the columnar sleeve (131) by the waterproof sealing cover (11), and the waterproof seal (25) is wrapped around the side wall of the output shaft (31) of the drive mechanism (3).

10. The hair cutter according to claim 1, characterized in that: A double-groove transmission component (23) is sleeved on the free end of the output shaft of the drive mechanism (3). The double-groove transmission component (23) includes a first groove and a second groove. The openings of the first groove and the second groove are arranged opposite to each other, and the center lines of the first groove and the second groove coincide along the length direction. The second groove is sleeved on the output shaft of the drive mechanism (3), while the first groove is detachably sleeved on the linkage component (24) of the cutter head assembly (2).

11. The hair cutter according to claim 10, characterized in that: The linkage (24) includes a first connecting part (241) that is connected to the double-groove transmission part (23). The first connecting part (241) is square, and the shape of the first groove on the double groove transmission member (23) matches the shape of the first connecting part (241). The joint between the surfaces of the first groove and the joint between the surfaces of the first connecting part (241) are both arc-shaped. And / or the linkage (24) includes a second connecting part (242), the second connecting part (242) is cylindrical, and a plurality of protruding connecting posts (243) are arranged circumferentially on the second connecting part (242). The diameter of the head of the connecting post is smaller than the diameter of its root. The hair cutter also includes a connector (26), and a plurality of collars (261) are arranged in a circular array at the bottom of the connector (26). The number of collars (261) is the same as the number of connecting posts (243). The connector (26) is connected to the second connecting part (242) of the linkage (24) by sleeve of the collars (261) and the connecting posts (243). A conversion head (262) is provided on the top of the connector (26) and connected to the transmission component of the cutter head assembly (2). The conversion head (262) converts the rotational motion output by the drive mechanism (3) into the movement direction required for the operation of the cutter head assembly (2).

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