Speed-adjustable hair conditioner

Abstract

The utility model relates to the technical field of hair clippers, in particular to a speed-adjustable hair clipper, which comprises a shell, a movable cutter head, a circuit board and a motor for controlling the running speed of the movable cutter head, the encoder is used for converting the rotation angle of the knob into an electric signal and transmitting the electric signal to the circuit board, the circuit board is used for controlling the output power of the motor according to the electric signal and then adjusting the running speed of the tool bit, and the problems that an existing hair clipper is inconvenient in speed adjustment and poor in use experience are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hair clippers, in particular to a speed-adjustable hair clipper. Background Art

[0002] A hair clipper is an electronic product used to trim hair. It uses a motor to drive the corresponding moving cutter head to move, and then uses the moving cutter head to trim the hair. Most of the electric clippers on the market currently use buttons to increase or decrease the motor's allowable speed. For example, the application number is "CN208812156U" and the name is "A push-button self-locking hair clipper". Its disadvantage is that the button operation is not convenient and the user experience is poor. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the present utility model is to provide a speed-adjustable hair clipper, which solves the problem that the speed adjustment of existing hair clippers is inconvenient and the user experience is poor.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a speed-adjustable hair clipper, including a shell, a movable cutter head, a circuit board and a motor for controlling the running speed of the movable cutter head. The circuit board is provided with an encoder, and a knob is rotatably connected to the shell. The knob is connected to the encoder through a gear structure. The encoder is used to convert the rotation angle of the knob into an electrical signal and transmit it to the circuit board. The circuit board is used to control the output power of the motor according to the electrical signal, thereby adjusting the running speed of the movable cutter head.

[0005] Furthermore, the gear structure includes a gear that rotates synchronously with the encoder input end and a gear ring arranged on the circumference of the knob, and the gear ring is meshed with the gear.

[0006] By adopting the above technical solution, the knob is engaged with the ring gear on the encoder through the gear, and then a gear speed change mechanism can be formed by using the ring gear with a larger diameter and the gear with a smaller diameter. That is, by rotating the knob in a small range, the gear axis can be driven to rotate through the ring gear, thereby facilitating rapid adjustment of the output power of the motor and realizing convenient adjustment of the speed of the moving cutter head. At the same time, through the engagement of the gear and the ring gear, the rotation of the knob is relatively smooth and the noise is relatively small.

[0007] Furthermore, a bracket is installed on the circuit board, and the knob is arranged on the bracket for corresponding rotation.

[0008] By adopting the above technical solution, the setting of the bracket provides a carrier for the rotation of the knob, thereby avoiding the problem that the knob is directly connected to the circuit board or the housing and is easily damaged by the rotation of the knob.

[0009] Furthermore, an annular guide groove is provided around the knob, and an annular guide rail is provided on the bracket to cooperate with the annular guide groove. The knob is slidably matched with the annular guide rail through the annular guide groove to be rotatably connected to the bracket.

[0010] By adopting the above technical solution, the annular guide groove and the annular guide rail are set, so that the knob can rotate more smoothly.

[0011] Furthermore, an opening for accommodating the knob is provided on the housing, and the maximum diameter of the outer circumference of the knob is larger than the aperture of the opening, so that the knob partially covers the outside of the opening.

[0012] By adopting the above technical solution, the knob partially covers the opening, which is convenient for covering the opening and preventing hair, dust and the like from directly entering the housing through the gap between the knob and the opening, thereby achieving good dust and rainproof effects.

[0013] Furthermore, the knob includes a ring body and an operating ring detachably mounted on the ring body, wherein the operating ring protrudes from the surface of the shell and covers the opening.

[0014] By adopting the above technical solution, the operating ring and the ring body are designed to be detachable, which makes it easy to disassemble the operating ring. It is also easy to open the operating ring to inspect and maintain the components inside the opening. The operating ring protrudes from the surface of the shell to facilitate personnel to operate and rotate the operating ring.

[0015] Furthermore, a raised ring is provided on the periphery of the opening of the shell, the bottom periphery of the raised ring corresponds to the periphery of the ring body, and the periphery of the operating ring corresponds to the outside of the raised ring.

[0016] By adopting the above technical solution, the design of the raised ring can prevent water droplets, hair and other debris on the shell from directly entering the shell along the shell surface, further improving the waterproof and dustproof effect of the operating ring on the opening.

[0017] Furthermore, a display screen is provided on the circuit board, and a hollow is formed in the bracket to accommodate the display screen.

[0018] Through the above technical solution, the display screen is used to display various data, including motor operating speed, gear information, battery power, etc., and the bracket is hollowed out to limit the position of the display screen. At the same time, it can also protect the periphery of the display screen from damage due to collision, thereby improving the safety of the display screen.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] 1. In the present invention, the knob is connected to the encoder through a gear structure, and the encoder converts the angle change of the knob into an electrical signal and transmits it to the circuit board, which then controls the running speed of the motor. This adjustment method can adjust the output power of the motor intuitively and linearly, making manual operation more convenient to adjust the running speed of the hair clipper and providing a better user experience.

[0021] 2. In the present invention, the knob is indirectly connected to the encoder through a gear structure, which has the following effects: first, by having different gear ratios of the gear structure, a small rotation of the knob can be converted into a large rotation of the encoder, thereby improving the accuracy of the angle measurement. At the same time, the gear structure can reduce the mechanical error caused by the direct connection of the knob to the encoder, making the encoder reading more accurate.

[0022] Second: The gear structure can amplify the torque applied by the knob, making the knob easier to operate, especially when fine adjustment is required. At the same time, the torque on the knob can be transmitted to the encoder through the gear structure, reducing the burden on the user when operating the knob, making it easy and smooth for the operator to operate the knob.

[0023] Third: The gear structure can absorb some vibration and impact, reduce encoder wear and extend the service life of the encoder. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a hair clipper of the present utility model.

[0025] Figure 2 This is a structural breakdown diagram of the hair clipper of the present utility model.

[0026] Figure 3 This is a schematic diagram of the ring structure of the utility model.

[0027] Figure 4 This is a schematic diagram of the operating ring structure of the utility model.

[0028] Figure 5 This is a schematic diagram of the upper shell structure of the utility model.

[0029] In the figure: 110 lower shell, 120 upper shell, 121 opening, 122 raised ring;

[0030] 200 circuit board, 210 first board, 220 second board, 221 display screen.

[0031] 300 encoder, 310 encoder shaft hole.

[0032] 400 gear, 410 gear shaft.

[0033] 500 ring frame, 510 ring guide rail, 520 mounting foot, 530 arch, 540 hollow.

[0034] 600 knob, 610 ring body, 611 annular guide groove, 612 gear ring, 613 slot, 620 operating ring, 621 buckle.

[0035] 700 motor, 710 eccentric wheel.

[0036] 800 moving cutter head.

[0037] 900 protective case. DETAILED DESCRIPTION

[0038] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0039] Reference Figure 1 The hair clipper includes a shell, which includes an upper shell 120 and a lower shell 110. A circuit board 200, a display screen 221, an encoder 300, a motor 700, a battery and other components are arranged inside the shell. A knob 600 is rotatably provided on the upper shell 120. A cutter head assembly is provided at one end of the shell. The cutter head assembly includes a movable cutter head 800 and a fixed cutter head. The fixed cutter head is connected to the shell. The movable cutter head 800 is arranged on one side of the fixed cutter head. The output end of the motor 700 is connected to the movable cutter head 800 through an eccentric wheel 710, which is used to drive the movable cutter head 800 to trim the hair. The encoder 300 is connected to the circuit board 200. The input end of the encoder 300 is provided with an encoder shaft hole 310. The knob 600 and the encoder shaft hole 310 are linked by a gear structure. When the knob 600 is rotated, the encoder 300 is driven to move through the gear structure. The encoder 300 converts the angular rotation of the knob 600 into an electrical signal to be received by the circuit board 200. The circuit board 200 controls the output power of the motor 700 according to the electrical signal input by the encoder 300, thereby changing the running speed of the movable cutter head 800, thereby realizing the adjustment of the running speed of the cutter head.

[0040] In this embodiment, the knob 600 is connected to the encoder 300 through a gear structure, which has the following advantages: a small rotation of the knob 600 can be converted into a larger rotation of the encoder shaft hole 310 through different gear ratios of the gear structure, thereby improving the accuracy of the angle measurement; at the same time, the gear structure can reduce the mechanical error caused by the direct connection of the knob 600 to the encoder 300, making the reading of the encoder 300 more accurate; the gear structure can amplify the torque applied by the knob 600, making the knob 600 easier to operate, especially when fine adjustment is required; at the same time, the torque on the knob 600 can be transmitted to the encoder 300 through the gear structure, reducing the burden on the user when operating the knob 600, and making it easy and smooth for the person to operate the knob 600; third, the gear structure can absorb some vibration and impact, reduce the wear of the encoder 300, and extend the service life of the encoder 300.

[0041] Reference Figure 2 and 3 The upper shell 120 is provided with an opening 121. The knob 600 is provided at the position of the opening 121. The gear structure includes a ring gear 612 provided around the knob 600 and a gear 400 that forms a gear meshing with the ring gear 612. The diameter of the gear 400 is much smaller than the diameter of the ring gear 612. The gear 400 has a gear shaft 410. The gear shaft 410 is keyed to the encoder shaft hole 310 on the encoder 300. When the knob 600 is rotated, the gear 400 is driven to rotate by the ring gear 612. After the gear 400 drives the encoder 300 to run, the encoder 300 generates a corresponding electrical signal that can be received by the circuit board 200, and then the running speed of the motor 700 is controlled by the circuit board 200. The gear ratio between the ring gear 612 and the gear 400 is larger, and the corresponding knob 600 rotates lighter and smoother.

[0042] Reference Figure 2 In order to prevent dust, liquid and other debris from entering the housing through the opening 121 and damaging the electronic components of the hair clipper, in this embodiment, the maximum diameter of the knob 600 is larger than the diameter of the opening 121, so that the knob 600 can block and cover the opening 121, which helps to reduce the entry of dust and other foreign matter into the housing through the opening 121.

[0043] Based on the above embodiment, the knob 600 includes a ring body 610 and an operating ring 620. The operating ring 620 can be detachably installed on the ring body 610. The gear ring 612 is correspondingly arranged on the inner side of the ring body 610. The ring body 610 is located inside the opening 121. The operating ring 620 protrudes from the opening and extends out of the surface of the upper shell 120 to facilitate the user to rotate the operating ring 620.

[0044] In this embodiment, a friction protrusion is provided on the outside of the operating ring 620 to increase the contact friction between the user's fingers and the operating ring 620 , so as to facilitate the user to operate and rotate the operating ring 620 .

[0045] In this embodiment, refer to Figure 2 and 4 As a detachable connection method between the operating ring 620 and the ring body 610, the operating ring 620 and the ring body 610 can be connected by snapping, bonding, screwing, etc. This embodiment is explained by taking the snapping method as an example. Specifically, the circumferential spacer ring of the rotating ring is provided with a snap 621, and the periphery of the ring body 610 is provided with a slot 613 that cooperates with the hook 621. The two are directly snapped together by the snap 621 and the slot 613, or are snapped together by rotating after the hook 621 and the slot 613 are positioned relative to each other.

[0046] Based on the above embodiment, the operating ring 620 is a circular structure, and its maximum diameter is larger than the diameter of the opening 121, so that the operating ring 620 can cover the outside of the opening 121, thereby achieving a dust-proof and water-repellent effect. In order to facilitate the observation of the status of various electronic components inside the hair clipper through the opening 121, the inside of the circular ring of the operating ring 620 can be made of transparent materials, such as transparent plastic or glass, so that the user can intuitively check the status of the electronic components inside the hair clipper, and the transparent material has a more novel and beautiful shape.

[0047] Based on the above embodiment, refer to Figure 2 and 5 In order to further enhance the waterproof and dustproof effect of the shell, the upper shell 120 is provided with a raised ring 122 at the position of the opening 121. The ring body 610 of the knob 600 is correspondingly arranged at the bottom of the raised ring 122, and the operating ring 620 is correspondingly covered around the upper end of the raised ring. In this way, the setting of the raised ring can further prevent water droplets, dust and other debris on the shell from directly entering the shell along the surface of the shell, further enhancing the waterproof and dustproof effect of the operating ring 620 on the opening 121.

[0048] Limited, in this embodiment, the raised ring 122 has an inclined hypotenuse, and its bottom edge is integrally formed with the opening 121. The upper end thereof is gradually inclined and extended toward the opening 121, and the corresponding upper end face of the ring body 610 also has the same bevel ring. In this way, the bevel 122 on the raised ring is combined with the bevel ring on the ring body 610 to improve the sealing of the connection between the two and improve the dustproof and waterproof effect of the shell.

[0049] In this embodiment, refer to Figure 2 and 3As an embodiment of the rotational connection between the knob 600 and the housing, a bracket is provided inside the housing, the bracket including an annular frame 500 and mounting feet 520, the ring body 610 is rotationally connected to the annular frame 500, the annular frame 500 is mounted on the circuit board 200 or the housing through the mounting feet 520, an annular guide rail 510 is provided on the circumference of the annular frame 500, and an annular guide groove 611 is provided at the lower end of the ring gear 612 of the ring body 610, so that the ring body 610 can realize the rotational connection of the knob 600 on the housing through the sliding fit between the annular guide rail 510 and the annular guide groove 611.

[0050] In this embodiment, the lower end of the gear shaft 410 of the gear 400 is key-connected to the encoder shaft hole 310, and the upper end thereof can be rotatably mounted on the annular frame 500, so that the gear 400 can run more smoothly under the engagement of the ring gear 612. Specifically, a raised arch 530 is provided inside the annular frame 500, and a rotating hole is opened on the arch 530, and the upper end of the gear shaft 410 is rotatably connected in the rotating hole.

[0051] In this embodiment, the height of the annular guide rail 510 protrudes from the upper end surface of the annular frame 500. The advantage of this is that after the ring body 610 slides with the annular guide rail 510 through the annular guide groove 611, the raised annular guide rail 510 can be used to lift the ring body 610, thereby creating a certain gap between the contact surfaces of the ring body 610 and the annular frame 500, thereby avoiding contact wear when the two rotate relative to each other, thereby reducing the friction resistance when the knob 600 rotates, and also making the knob 600 rotate relatively smoothly.

[0052] Further, refer to Figure 2 The above-mentioned display screen can be electrically connected to the circuit board 200 through a wire, or directly welded to the circuit board 200. In order to limit the position of the display screen in the shell to prevent the display screen 221 from being damaged during movement or accidental collision of the hair clipper, a hollow 540 adapted to the size of the display screen 221 is provided inside the annular frame 500. By embedding the display screen 221 into the hollow 540, the display screen 221 can be protected. In summary, the setting of the bracket provides a rotating carrier for the ring body 610 and the gear 400, and can also protect the display screen 221, effectively simplifying the internal structure of the hair clipper, achieving multiple uses of one component, effectively optimizing the product structure, and making the layout of various components inside the product more reasonable.

[0053] Based on the above embodiment, the circuit board 200 includes a first board 210 and a second board 220, and the first board 210 and the second board 220 are flexibly connected by a wire. The first board 210 is larger than the first board 210. The battery can be arranged on the first board 210, and the encoder 300 and the display screen 221 can be arranged on the second board 220. By utilizing the flexible connection between the first board 210 and the second board 220, the distribution of each electronic component on the circuit board 200 can be changed, so that each electronic component can be reasonably and regularly distributed on the circuit board 200, thereby avoiding the problem that the integrated circuit board 200 occupies a large space inside the shell and affects the arrangement of other electronic components.

[0054] Based on the above embodiment, in order to protect the entire housing of the hair clipper, a protective cover 900 may be provided outside the housing to further protect the housing.

[0055] Although the preferred embodiments of the present invention have been described in detail above, it should be clearly understood that various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A speed-adjustable hair clipper, comprising a housing, a movable cutter head, a circuit board, and a motor for controlling the speed of the movable cutter head, characterized in that: An encoder is provided on the circuit board, and a knob is rotatably connected to the shell. The knob is connected to the encoder through a gear structure. The encoder is used to convert the rotation angle of the knob into an electrical signal and transmit it to the circuit board. The circuit board is used to control the output power of the motor according to the electrical signal, thereby adjusting the operating speed of the movable cutter head.

2. A speed-adjustable hair clipper according to claim 1, characterized in that: The gear structure includes a gear that rotates synchronously with the input end of the encoder and a gear ring arranged on the circumference of the knob, and the gear ring is meshed with the gear.

3. The speed-adjustable hair clipper according to claim 1, characterized in that: A bracket is installed on the circuit board, and the knob is arranged on the bracket for corresponding rotation.

4. The speed-adjustable hair clipper according to claim 3, characterized in that: An annular guide groove is provided on the periphery of the knob, and an annular guide rail matched with the annular guide groove is provided on the bracket. The knob is slidably matched with the annular guide rail through the annular guide groove to be rotatably connected with the bracket.

5. The speed-adjustable hair clipper according to claim 1, characterized in that: The housing is provided with an opening for accommodating the knob, and the maximum diameter of the outer circumference of the knob is larger than the aperture of the opening, so that the knob partially covers the outside of the opening.

6. The speed-adjustable hair clipper according to claim 5, characterized in that: The knob comprises a ring body and an operating ring detachably mounted on the ring body, wherein the operating ring protrudes from the surface of the shell and covers the opening.

7. The speed-adjustable hair clipper according to claim 6, characterized in that: The shell is provided with a raised ring around the opening, the bottom periphery of the raised ring corresponds to the periphery of the ring body, and the periphery of the operating ring corresponds to the outside of the raised ring.

8. The speed-adjustable hair clipper according to claim 3, characterized in that: A display screen is provided on the circuit board, and a hollow is formed in the bracket to accommodate the display screen.

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