Blade module and hair cutting device

Abstract

This application provides a blade module and a hair cutting device to address the problems of reducing energy loss and improving the service life of the hair cutting device. The blade module includes a first housing, a drive coil assembly, a magnet assembly, and a blade assembly. The first housing has a first receiving cavity and a first opening communicating with the first receiving cavity. At least one drive coil assembly is disposed within the first receiving cavity, and the drive coil assembly includes a drive coil. A magnet assembly is disposed opposite to the drive coil assembly and is rotatable relative to the first housing about a first axis; the magnet assembly includes a magnet. At least one blade assembly is disposed at the first opening and is drively connected to at least one magnet assembly; when the drive coil is energized, it can drive the magnet assembly to rotate about the first axis, thereby causing the blade assembly to rotate relative to the first housing. The blade module provided by this application has low energy loss and a long service life.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, specifically to a blade module and a hair cutting device. Background Technology

[0002] Hair trimmers are widely used household appliances. Existing hair trimmers typically connect a motor's output shaft to a transmission structure, which in turn connects to a blade assembly, driving the blade assembly to rotate and cut the hair. However, this transmission method results in friction between the motor's output shaft and the rotating components, leading to high energy loss, low efficiency, and short lifespan. Utility Model Content

[0003] This application provides a blade module and a hair cutting device to address the problems of reducing energy consumption and improving the service life of the hair cutting device.

[0004] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0005] In a first aspect, embodiments of this application provide a cutting head module, which includes a first housing, at least one drive coil assembly, at least one magnet assembly, and at least one blade assembly. The first housing has a first receiving cavity and a first opening communicating with the first receiving cavity. At least one drive coil assembly is disposed within the first receiving cavity, and the drive coil assembly includes a drive coil. A magnet assembly is disposed opposite to the drive coil assembly and is rotatable relative to the first housing about a first axis; the magnet assembly includes a magnet. At least one blade assembly is disposed at the first opening and is drively connected to the at least one magnet assembly; when the drive coil is energized, it can drive the magnet assembly to rotate about the first axis, thereby causing the blade assembly to rotate relative to the first housing.

[0006] Secondly, embodiments of this application provide a hair cutting device, which includes a body and a blade module. The blade module is the aforementioned blade module, and the blade module is mounted on the body.

[0007] The blade module and hair cutting device provided in this application have the following beneficial effects:

[0008] The blade module provided in this application arranges the drive coil assembly and the magnet assembly one-to-one, so that when the drive coil of the drive coil assembly is energized, the magnetic field generated can act on the magnet, causing the magnet assembly to rotate around a first axis, thereby driving the blade assembly to rotate relative to the first housing to cut hair. Based on this, compared with the method of driving the blade assembly to rotate through a transmission structure via a motor output shaft, this blade module uses electromagnetic drive, so that the magnet assembly and the drive coil assembly do not need to be assembled in contact. Therefore, there is no need to set up fixing, sealing, lubrication and other structures adapted to the transmission shaft between them. The overall structure of the module is simpler, the energy loss is smaller, and it is beneficial to extend the service life of the blade module and the hair cutting device using this blade module.

[0009] The beneficial technical effects of the hair cutting device provided in this application are the same as those of the blade module provided in this application, and will not be repeated here. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of a hair cutting device provided in some embodiments of this application;

[0011] Figure 2 for Figure 1 A schematic diagram of the blade module of the hair cutting device shown.

[0012] Figure 3 for Figure 2 Exploded view of the cutter head module shown;

[0013] Figure 4 for Figure 2 The cutter head module shown is a cross-sectional view at line AA;

[0014] Figure 5 for Figure 2 A schematic diagram of the magnet holder of the cutter head module is shown.

[0015] Figure 6 for Figure 3 A partial structural schematic diagram of the cutter head module shown;

[0016] Figure 7 for Figure 3 An exploded view of the transmission structure of the cutter head module shown.

[0017] Figure 8 for Figure 3 A schematic diagram of the protective shell of the cutter head module shown;

[0018] Figure 9 for Figure 1 An exploded view of another structure of the blade module of the hair cutting device shown.

[0019] Figure 10 for Figure 9 The cutter head module shown is a cross-sectional view at line BB;

[0020] Figure 11 for Figure 9 A partial structural schematic diagram of the cutter head module shown;

[0021] Figure 12 for Figure 11 A schematic diagram of a portion of the cutter head module as viewed from another angle;

[0022] Figure 13 for Figure 10 A partial structural schematic diagram of the cutter head module shown;

[0023] Figure 14 for Figure 13 A partial structural schematic diagram of the cutter head module shown;

[0024] Figure 15 for Figure 13 The cutter head module shown is a cross-sectional view at CC.

[0025] Figure 16 This is a schematic diagram of the structure of a hair cutting device provided in some other embodiments of this application.

[0026] Figure label:

[0027] Hair cutting device 100;

[0028] Cutter head module 10; First housing 11; First housing portion 111; Second housing portion 112; First receiving cavity 11a; First chamber 11a1; Second chamber 11a2; First opening 11b; Fifth opening 11c; First protrusion 11d; Drive coil assembly 12; Drive coil 121; Coil fixing bracket 122; Magnetic core 123; Winding groove 123a; Magnet assembly 13; Magnet 131; Magnet fixing bracket 132; First groove 132a; Third shaft hole 132b; Fixing bracket body 1321; Plug 1322; Bearing 133; Blade assembly 14; Third rotating shaft 141; Second groove 141a; Cutter disc 142; First partition 15; Transmission structure 16; 1. Rotating shaft 161; 2. Rotating shaft 162; 3. Protrusion 162a; 4. Protrusion 162b; 5. Driving gear 163; 6. Driven gear 164; 7. Guide hole 164a; 8. Gear body 1641; 9. Connecting part 1642; 10. Elastic element 165; 11. Protective shell 17; 17a. Second receiving cavity 17; 171. First bearing plate 171; 171b. First opening 171c; 171d. Fourth rotating shaft 171d; 1711. Bearing plate body 1712; 172. Second opening 172a; 172b. Second shaft hole 172b; 173. Cover 173; 18. Third opening 18a; 18a. Fifth rotating shaft 18b; 19. Blade mesh 19; 23. Support 23; 23a. Fourth shaft hole 23a; 24. Decorative element 24.

[0029] Body 20; Second housing 21; Charging port 21a; Button 22. Detailed Implementation

[0030] In the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0031] In the embodiments of this application, it should be understood that the directional terms mentioned, such as "up", "down", "left", "right", "inner", "outer", etc., are only for reference to the direction of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0032] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0033] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0034] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0035] In the embodiments of this application, it should be noted that the descriptions of "vertical" and "parallel" respectively indicate approximately vertical and approximately parallel within a certain error range. This error range can be a range with a deviation angle of less than or equal to 5°, 8° or 10° relative to absolute verticality and absolute parallelism, respectively, and is not specifically limited here.

[0036] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0037] Please see Figure 1 , Figure 1 This is a schematic diagram of a hair cutting device 100 provided in some embodiments of this application. The hair cutting device 100 includes a blade module 10 and a body 20.

[0038] It should be noted that the hair cutting device 100 mentioned in this application can be a razor, a hair clipper, a nose hair trimmer, etc., and this application does not limit the specifics here.

[0039] The body 20 supports the cutter head module 10. The body 20 includes a second housing 21, functional components (not shown), and a button 22. The functional components are disposed within the mounting cavity enclosed by the second housing 21. These functional components include, but are not limited to, a circuit board and a battery. The button 22 is disposed on the second housing 21 and is used to control the circuit board to supply power to the cutter head module 10 and to control the circuit board to stop supplying power to the cutter head module 10. The second housing 21 has a charging port 21a for connecting an external power source to charge the battery.

[0040] The blade module 10 is mounted on the body 20. Specifically, the blade module 10 can be detachably mounted to one end of the body 20 by means of snap-fit, threaded connection, etc., to facilitate maintenance of the blade module 10 and the body 20. When the user uses the hair cutting device 100, they can hold the body 20 to cut the hair.

[0041] Please refer to the following: Figures 2-4 , Figure 2 for Figure 1 A schematic diagram of one structure of the blade module 10 of the hair cutting device 100 shown. Figure 3 for Figure 2 The exploded view of the cutter head module 10 shown is shown. Figure 4 for Figure 2 The cutter head module 10 shown is a cross-sectional view at line AA. The cutter head module 10 includes a first housing 11, at least one drive coil assembly 12, at least one magnet assembly 13, and at least one blade assembly 14. The first housing 11 has a first receiving cavity 11a and a first opening 11b and a fifth opening 11c communicating with the first receiving cavity 11a. The first housing 11 can be a one-piece molded structure, and the first opening 11b and the fifth opening 11c are disposed at opposite ends of the first housing 11 along a first direction Z. Figure 2 and Figure 3 In the illustrated embodiment, the end of the first housing 11 furthest from the first opening 11b is tapered, and the area of ​​the first opening 11b is larger than the area of ​​the fifth opening 11c. Based on this, the end of the first housing 11 furthest from the first opening 11b is connected to the fuselage 20, and the fifth opening 11c is connected to the mounting cavity of the second housing 21 of the fuselage 20 to facilitate the laying of communication lines.

[0042] At least one drive coil assembly 12 is disposed within the first receiving cavity 11a and arranged along the aforementioned first direction Z with the first opening 11b. The drive coil assembly 12 includes a drive coil 121 and a coil holder 122. The coil holder 122 is generally disc-shaped and is fixed to the first housing 11. Specifically, the coil holder 122 can be fixed to the first housing 11 by means of threaded connection, adhesive, snap-fit, etc. The coil holder 122 has a through hole (not shown in the figure). Based on this, the drive coil 121 is fixed to the surface of the coil holder 122 facing the first opening 11b. Figure 3 and Figure 4 In the illustrated embodiment, the axis of the drive coil 121 is parallel to the first direction Z. In other embodiments, the axis of the drive coil 121 may also be perpendicular to the first direction Z.

[0043] The magnet assembly 13 corresponds one-to-one with the drive coil assembly 12. One magnet assembly 13 is disposed opposite to one drive coil assembly 12 along the first direction Z, and is rotatable relative to the first housing 11 about the first axis L1, which is parallel to the first direction Z. The magnet assembly 13 includes a magnet 131, and the end of the magnet 131 facing the drive coil assembly 12 has N poles and S poles alternately arranged around the first axis L1.

[0044] At least one blade assembly 14 is disposed at the first opening 11b and is drively connected to at least one magnet assembly 13. When the drive coil 121 is energized, it can drive the magnet assembly 13 to rotate about the first axis L1, thereby causing the blade assembly 14 to rotate relative to the first housing 11.

[0045] In this way, the hair cutting device 100 provided in this application, by arranging the drive coil 121 and the magnet assembly 13 opposite each other along a first direction, and having the magnet 131 of the magnet assembly 13 having alternating N and S poles around the first axis L at the end facing the drive coil 121, allows the magnetic field generated when the drive coil 121 is energized to act on the magnet 131, causing the magnet assembly 13 to rotate around the first axis L1, thereby driving the blade assembly 14 to rotate relative to the first housing 11 to cut the hair. Based on this, compared to the method of driving the transmission structure through the motor output shaft to drive the blade assembly 14 to rotate, this hair cutting device 100 uses electromagnetic drive, so that there is no need for contact assembly between the magnet assembly 13 and the drive coil 121. Therefore, there is no need to set up fixing, sealing, lubrication, or other structures adapted to the transmission shaft between them. The overall structure of the device is simpler, the energy loss is smaller, and it is beneficial to extend the service life of the hair cutting device 100.

[0046] Please continue reading. Figures 2-4 The number of magnets 131 is multiple, and the multiple magnets 131 are arranged in a ring array around the first axis L1. The magnets 131 are magnetized along the first direction Z, and the polarities of adjacent magnets 131 facing the drive coil 121 are opposite. Specifically, the number of magnets 131 is even, and the magnets 131 can be roughly fan-shaped. In this way, the volume of a single magnet 131 can be as large as possible. Under the same magnetization intensity, the magnetic field of a single magnet 131 can be as large as possible, which in turn allows the torque generated by the rotation of the magnet assembly 13 to be greater, thereby improving the cleanliness of the hair cutting by the blade assembly 14.

[0047] Figures 2-4In the illustrated embodiment, there are six magnets 131. In other embodiments, the number of magnets 131 may be two, four, eight, or other similar. In yet another embodiment, there may be only one magnet 131, which is magnetized in a direction perpendicular to the first direction Z. In still another embodiment, the magnet 131 may also be circular, polygonal, irregular, or other shapes.

[0048] Please continue reading. Figures 2-4 The drive coil assembly 12 includes multiple drive coils 121 arranged in a ring array around the first axis L1. Specifically, the number of drive coils 121 is even, and the cross-sectional shape of the drive coils 121 can be fan-shaped. This allows different drive coils 121 to be energized, enabling them to collectively drive the magnet assembly 13 to rotate, generating greater torque and thus improving the cleanliness of hair cutting. Furthermore, by connecting multiple drive coils 121 in parallel, the equivalent resistance can be reduced, lowering energy consumption. Finally, the multiple drive coils 121 can disperse the heat points, reducing heat density and improving the service life of the hair cutting device 100.

[0049] Figures 2-4 In the illustrated embodiment, the number of drive coils 121 is eight. In some other embodiments, the number of drive coils 121 may be two, four, six, ten, etc. In still other embodiments, the number of drive coils 121 may be one.

[0050] Based on the above, please continue to refer to... Figures 2-4 The drive coil assembly 12 also includes a magnetic core 123. One drive coil 121 is wound on one magnetic core 123, meaning there are multiple magnetic cores 123, each corresponding to a drive coil 121. Specifically, the outer circumferential surface of the magnetic core 123 may have a winding groove 123a, in which the drive coil 121 is wound. The magnetic core 123 may be a silicon steel sheet core, a ferrite core, an amorphous alloy core, an iron powder core, etc.

[0051] In this way, the magnetic core 123 can cooperate with the drive coil 121 to enhance the magnetic field strength and concentrate the magnetic flux in the area of ​​the magnet assembly 13, thereby improving energy utilization and thus improving the hair cutting effect. In addition, when the drive coil 121 is not energized, the magnet assembly 13 can also attract the magnetic core 123, thereby fixing the magnet assembly 13 and the drive coil assembly 12 relative to each other, thus improving the connection reliability of the hair cutting device 100.

[0052] Please refer to the following: Figures 3-5 , Figure 5 for Figure 2The diagram shows the structure of the magnet holder 132 in the cutter head module 10. The magnet assembly 13 also includes the magnet holder 132. The magnet holder 132 is generally disc-shaped, and the magnet 131 is fixed to the magnet holder 132. Specifically, the magnet 131 can be fixed to the magnet holder 132 by means of adhesive bonding, snap-fitting, etc. The magnet holder 132 is connected to the blade assembly 14 via a transmission connection. In this way, the transmission connection between the magnet holder 132 and the blade assembly 14 facilitates the replacement of the magnet 131 when its magnetism weakens.

[0053] As one possible implementation, the surface of the magnet holder 132 has a first groove 132a, and a magnet 131 is embedded in a first groove 132a. That is, there are multiple first grooves 132a, and they correspond one-to-one with the magnets 131. Figures 3-5 In the illustrated embodiment, the first groove 132a is located on the surface of the magnet holder 132 facing the drive coil assembly 12. In other embodiments, the first groove 132a may also be located on the surface of the magnet holder 132 facing away from the drive coil assembly 12.

[0054] In this way, the magnet holder 132 can protect the magnet 131, preventing the magnet 131 from detaching from the magnet holder 132 under centrifugal force when the magnet assembly 13 rotates relative to the first housing 11. In addition, this connection method can also increase the connection area between the magnet holder 132 and the magnet 131, ensuring the reliability of the magnet 131 being fixed to the magnet holder 132.

[0055] In some examples, the magnet holder 132 can be a magnetically conductive structure. In this way, the magnet holder 132 can converge magnetic field lines, making the magnetic field lines as concentrated as possible in the area where the magnet 131 is located, ensuring the conversion rate of magnetic field energy, and thus improving the cleanliness of hair cutting by the hair cutting device 100.

[0056] In other instances, the magnet holder 132 can be a plastic structural component. This makes the magnet holder 132 lighter, which is beneficial for the weight reduction of the cutter head module 10, and consequently for the overall weight reduction of the hair cutting device 100.

[0057] In some other embodiments, the magnet assembly 13 may not include the magnet holder 132, and multiple magnets 131 may be connected to form a ring, with the blade assembly 14 being drivenly connected to the magnets 131.

[0058] Based on the above, the distance between the drive coil 121 and the magnet 131 is less than or equal to 2.0 mm. This prevents the distance between the drive coil 121 and the magnet 131 from being too large, which would result in a low magnetic field energy conversion rate and affect the cleanliness of hair cutting.

[0059] Based on this, the distance between the drive coil 121 and the magnet 131 is greater than or equal to 0.5 mm. For example, the distance between the drive coil 121 and the magnet 131 can be 0.5 mm, 0.7 mm, 1.0 mm, 1.3 mm, 1.5 mm, 1.8 mm, 2.0 mm, etc. This prevents the drive coil 121 and the magnet 131 from coming into contact, which would increase the resistance between them and reduce the energy utilization rate of the blade assembly 14, thus affecting the cleanliness of hair cutting.

[0060] Please refer to the following: Figure 3 , Figure 4 and Figure 6 , Figure 6 for Figure 3 The diagram shows a partial structural schematic of the cutter head module 10. The cutter head module 10 also includes a first partition 15, which is connected to the first housing 11 to divide the first receiving cavity 11a into two non-communicating chambers: a first chamber 11a1 and a second chamber 11a2. Specifically, the inner circumferential surface of the first housing 11 may have multiple first protrusions 11d spaced circumferentially along the first opening 11b, and the first partition 15 is sandwiched between the aforementioned conical shell portion and the first protrusions 11d. Thus, the first partition 15 is detachably connected to the first housing 11, facilitating maintenance of components within the first chamber 11a1 and the second chamber 11a2. In other embodiments, the first partition 15 may also be connected to the first housing 11 by means of adhesion, threaded connection, or other methods. Based on this, the drive coil 121 is disposed on the side of the first partition 15 opposite to the first opening 11b and located in the second chamber 11a2, and the magnet assembly 13 is disposed in the first chamber 11a1, that is, the first opening 11b is connected to the first chamber 11a1.

[0061] In this way, the first partition 15 can prevent hair, moisture and other substances from entering the second chamber 11a2 and damaging the drive coil assembly 12 and the circuit board and other components in the second housing 21. At the same time, the first partition 15 can also form a hair-containing cavity with the first housing 11, which is convenient for cleaning hair.

[0062] Please refer to the following: Figure 3 and Figure 4 The number of drive coil assembly 12 and magnet assembly 13 is one, and the number of blade assembly 14 is multiple. Based on this, the cutter head module 10 also includes a transmission structure 16, which is driven between the magnet assembly 13 and the multiple blade assemblies 14, that is, the multiple blade assemblies 14 are all driven to the magnet assembly 13 through the transmission structure 16. Figure 3 and Figure 4In the illustrated embodiment, the number of blade assemblies 14 is three. In other embodiments, the number of blade assemblies 14 may also be two, four, five, etc.

[0063] In this way, the multiple blade assemblies 14 of the blade module 10 can improve the hair cutting efficiency. The transmission structure 16 is connected between a magnet assembly 13 and multiple blade assemblies 14, so that multiple blade assemblies 14 can be driven to cut hair by a single drive coil assembly 12, saving power and simplifying the control strategy.

[0064] Please refer to the following: Figure 4 , Figure 5 and Figure 7 , Figure 7 for Figure 3 The exploded view shows the transmission structure 16 of the cutter head module 10. As one possible implementation, the transmission structure 16 includes a first rotating shaft 161, a second rotating shaft 162, a driving gear 163, a driven gear 164, and an elastic element 165. The first rotating shaft 161 is fixed to the magnet assembly 13, and the axis of the first rotating shaft 161 is collinear with the first axis. Specifically, the magnet holder 132 has a third shaft hole 132b, through which the first rotating shaft 161 passes and is fixedly connected to the magnet holder 132. The first rotating shaft 161 can be fixed to the magnet holder 132 by means of bonding, threaded connection, interference fit, etc.

[0065] The drive gear 163 is fixed to the first rotating shaft 161. Specifically, the drive gear 163 can be sleeved and fixed to the first rotating shaft 161, or the drive gear 163 can be integrally formed with the first rotating shaft 161 as a gear shaft.

[0066] There are multiple second rotating shafts 162, each corresponding to a blade assembly 14, with one second rotating shaft 162 connected to one blade assembly 14. Specifically, the blade assembly 14 includes a third rotating shaft 141 and a cutter head 142. The cutter head 142 is fixed to the third rotating shaft 141 and has multiple blades extending in a first direction Z away from the magnet assembly 13. The surface of the third rotating shaft 141 facing the transmission structure 16 has a second groove 141a. Based on this, the outer peripheral surface of one end of the second rotating shaft 162 facing the blade assembly 14 has multiple second protrusions 162a arranged circumferentially along the second rotating shaft 162. One end of the second rotating shaft 162 is fitted into the second groove 141a with a clearance fit. Thus, when the second rotating shaft 162 rotates, it can drive the third rotating shaft 141 to rotate, thereby driving the cutter head 142 to rotate. In addition, it facilitates the insertion and removal of the second rotating shaft 162 and the third rotating shaft 141 for maintenance of related components. In some other embodiments, the second rotating shaft 162 may also be connected to the third rotating shaft 141 by means of welding, threaded connection or other methods.

[0067] There are multiple driven gears 164, each corresponding one-to-one with a second rotating shaft 162. One driven gear 164 is connected to one second rotating shaft 162, and meshes with a driving gear 163. Specifically, each driven gear 164 may include a gear body 1641 and a connecting portion 1642. The gear body 1641 meshes with the driving gear 163, and the connecting portion 1642 is connected to the surface of the gear body 1641 facing the blade assembly 14. The connecting portion 1642 is generally annular and has a guide hole 164a extending axially along the second rotating shaft 162. Based on this, the outer peripheral surface of the end of the second rotating shaft 162 away from the blade assembly 14 has a plurality of third protrusions 162b. The end of the second rotating shaft 162 is located inside the connecting part 1642. The third protrusions 162b correspond one-to-one with the guide holes 164a. One third protrusion 162b slides along the axial direction of the second rotating shaft 162 in a guide hole 164a.

[0068] Based on this, there are multiple elastic elements 165, each corresponding to a second rotating shaft 162. One elastic element 165 is connected between a second rotating shaft 162 and a driven gear 164. The elastic element 165 provides a force to the second rotating shaft 162 pointing towards the blade assembly 14. Specifically, the elastic element 165 can be a metal spring or a rubber block. The elastic element 165 is located inside the connecting part 1642 and is compressed and abuts against the second rotating shaft 162 and the gear body 1641.

[0069] In this way, when the drive coil assembly 12 drives the magnet assembly 13 to rotate, it drives the first rotating shaft 161 and the driving gear 163 fixed to the first rotating shaft 161 to rotate, which in turn drives the driven gear 164 and the second rotating shaft 162 connected to the driven gear 164 to rotate. The second rotating shaft 162 drives the blade assembly 14 to rotate to cut the hair. In this way, power is transmitted through a gear structure, and the transmission accuracy is high. On this basis, the second rotating shaft 162 and the blade assembly 14 can float along the axial direction of the second rotating shaft 162, so that when the multiple blade assemblies 14 cut the hair, they can conform to the user's body contour, thereby improving the cleanliness of the hair cutting.

[0070] In some other embodiments, the transmission structure 16 may also include an active magnet assembly (not shown) and a driven magnet assembly (not shown). The structures of the active and driven magnet assemblies can refer to the structure of the aforementioned magnet assembly 13, and will not be repeated here. The second rotating shaft 162 is connected to the driven magnet assembly. The active and driven magnets can be magnetized in a direction perpendicular to the first axis, and the polarities of the ends of two adjacent magnets away from the first axis are opposite. In this way, the power of the magnet assembly 13 can be transmitted to the blade assembly 14 by magnetic drive, thereby reducing contact friction and extending the service life of the hair cutting device 100.

[0071] The transmission structure 16 may also exclude the elastic element 165, and the second rotating shaft 162 may be fixedly connected to the driven gear 164.

[0072] Please refer to the following: Figure 3 , Figure 4 and Figure 8 , Figure 8 for Figure 3 The diagram shows the structure of the protective shell 17 of the cutter head module 10. The cutter head module 10 also includes the protective shell 17, which includes a first support plate 171 and a first cover 172. The first support plate 171 is disposed in the first receiving cavity 11a, and the surface of the first support plate 171 facing the first opening 11b has a fourth rotating shaft 171d. The first cover 172 is located on the side of the first support plate 171 facing the first opening 11b. The first cover 172 is fixed to the first support plate 171 and together with the first support plate 171, forms a second receiving cavity 17a. The magnet assembly 13 and the transmission structure 16 are located in the second receiving cavity 17a. Specifically, the first cover 172 can be fixed to the first support plate 171 by means of adhesive, snap-fit, threaded connection, etc. The fourth rotating shaft 171d corresponds one-to-one with the driven gear 164. One driven gear 164 is sleeved on one fourth rotating shaft 171d and can rotate relative to the fourth rotating shaft 171d. Based on this, the first cover 172 has a second opening 172a, which corresponds one-to-one with the second rotating shaft 162. A second rotating shaft 162 passes through a second opening 172a and is connected to a blade assembly 14.

[0073] This prevents the hair cut by the blade assembly 14 from falling into the connection part 1642 of the driven gear 164, which would make it difficult to clean and prevent the second rotating shaft 162 and the blade assembly 14 from floating. Based on this, the first support plate 171, the first cover 172, the transmission structure 16 and the magnet assembly 13 can be removed as a whole from the first receiving cavity 11a, making it easier to clean the hair in the aforementioned hair receiving cavity.

[0074] Please continue reading. Figure 4 and Figure 8The first support plate 171 includes a support plate body 1711 and a second cover 1712. The support plate body 1711 has a third opening 171b, and a portion of the magnet assembly 13 is located within the third opening 171b. The second cover 1712 is connected to the support plate body 1711 and covers the third opening 171b. Specifically, the second cover 1712 may be cylindrical with an opening, the open end of the second cover 1712 is connected to the support plate body 1711, and a portion of the magnet assembly 13 is located within the cavity of the second cover 1712.

[0075] Based on this, the second cover 1712 has a first shaft hole 171c, and one end of the aforementioned first rotating shaft 161 is fitted and accommodated in the first shaft hole 171c and can rotate relative to the second cover 1712; the first cover 172 has a second shaft hole 172b, and the other end of the first rotating shaft 161 is fitted and accommodated in the second shaft hole 172b and can rotate relative to the first cover 172. In some other embodiments, the second cover 1712 may not have the first shaft hole 171c, or the first cover 172 may not have the second shaft hole 172b.

[0076] This ensures that the distance between the magnet 131 and the drive coil 121 is as close as possible to guarantee the conversion rate of magnetic field energy. It also allows the distance between the main body of the support plate 1711 and the first partition 15 to be greater, thereby increasing the hair storage space between the protective shell 17 and the first partition 15 to prevent hair from accumulating near the blade assembly 14 and affecting the hair cutting effect.

[0077] Please refer to the following: Figure 3 and Figure 4 The cutter head module 10 also includes a third cover 18 and a blade mesh 19. The third cover 18 is detachably connected to the first housing 11 and is used to cover and open the first opening 11b. Specifically, the third cover 18 can be detachably connected to the first housing 11 by means of snap-fit, threaded connection, hinge, etc. The third cover 18 has a fourth opening 18a, which corresponds one-to-one with a blade assembly 14, with one blade assembly 14 located within one fourth opening 18a. The blade mesh 19 corresponds one-to-one with a blade assembly 14, with one blade mesh 19 disposed at one fourth opening 18a and covering one blade assembly 14, and the blade mesh 19 is connected to the third cover 18.

[0078] Specifically, the blade module 10 also includes a bracket 23 and a decorative element 24. The inner circumferential surface of the fourth opening 18a has two opposing and spaced-apart fifth rotating shafts 18b, the axis of which is perpendicular to the axis of the second rotating shaft 162. The bracket 23 is generally cylindrical with openings at both ends. The bracket 23 is located inside the fourth opening 18a, and the outer circumferential surface of the bracket 23 has two opposing and spaced-apart fourth shaft holes 23a. One fifth rotating shaft 18b is fitted into one of the fourth shaft holes 23a and can rotate relative to the bracket 23. Based on this, the blade assembly 14 is located inside the bracket 23, and the blade mesh 19 is located inside the bracket 23. The blade mesh 19 can be fixed to the bracket 23 by means of adhesive, snap-fit, threaded connection, etc., that is, the blade mesh 19 is indirectly connected to the third cover 18 through the bracket 23. The decorative element 24 is roughly ring-shaped. It surrounds the blade mesh 19 and the bracket 23 and is located on the side of the third cover 18 opposite to the first receiving cavity 11a. The decorative element 24 can be fixed to the bracket 23 by means of adhesive, snap-fit, threaded connection, etc.

[0079] In this way, the third cover 18 can be connected to the first housing 11 to seal the first opening 11b, allowing the blade 19 and the blade assembly 14 to cooperate in cutting hair. The third cover 18 can also be separated from the first housing 11 to facilitate cleaning of the hair within the hair-containing space. Furthermore, the bracket 23 can rotate relative to the third cover 18, allowing the blade 19 to rotate relative to the third cover 18. This enables the outer surfaces of the three blades 19 to conform as closely as possible to the user's body contours, thereby improving the cleanliness of hair cutting.

[0080] Based on the above, the third cover 18 is fixedly connected to the first cover 172. In this way, when the third cover 18 separates from the first housing 11, it can simultaneously separate the aforementioned protective shell 17 and the components inside the protective shell 17 from the first housing 11, facilitating hair removal. In some other embodiments, the third cover 18 may also be spaced apart from the first cover 172 to simplify the overall connection structure of the hair cutting device 100.

[0081] Please refer to the following: Figures 9-11 , Figure 9 for Figure 1 An exploded view of another structure of the blade module 10 of the hair cutting device 100 shown. Figure 10 for Figure 9 The cutter head module 10 shown is a cross-sectional view at line BB. Figure 11 for Figure 9 A partial structural schematic diagram of the cutter head module 10 shown. Figures 9-11 The illustrated embodiments and Figures 2-4The difference in the illustrated embodiment is that there are multiple drive coil assemblies 12 and multiple magnet assemblies 13. The drive coil assemblies 12, magnet assemblies 13 and blade assemblies 14 are in one-to-one correspondence. One magnet assembly 13 is arranged opposite to one drive coil assembly 12, and one blade assembly 14 is drivenly connected to one magnet assembly 13. The structures of the drive coil assemblies 12 and blade assemblies 14 can be referred to the foregoing, and will not be repeated here. Figures 9-11 In the illustrated embodiment, the number of drive coil assembly 12, magnet assembly 13, and blade assembly 14 are all three. In other embodiments, the number of drive coil assembly 12, magnet assembly 13, and blade assembly 14 may also be two, four, five, etc.

[0082] In this way, multiple drive coil assemblies 12 drive multiple magnet assemblies 13 to rotate the blade assembly 14, and different blade assemblies 14 can be controlled independently. When a drive coil assembly 12, magnet assembly 13, or blade assembly 14 fails, the hair cutting device 100 can continue to operate to cut the hair, which helps to extend the service life of the hair cutting device 100.

[0083] Please continue reading. Figures 9-11 The first housing 11 includes a first housing portion 111 and a second housing portion 112 arranged along a first direction Z, and the first housing portion 111 and the second housing portion 112 are detachably connected. The first housing portion 111 may be generally cylindrical with one end open, and the open end of the first housing portion 111 is connected to the open end of the second housing portion 112 facing the blade assembly 14. Specifically, the first housing portion 111 and the second housing portion 112 can be detachably connected by means of snap-fit, threaded connection, etc. Based on this, a first opening 11b is formed in the first housing portion 111. Specifically, the first opening 11b is opened in the bottom wall of the first housing portion 111. The magnet assembly 13 is disposed inside the first housing portion 111, and the drive coil 121 assembly 12 is disposed inside the second housing portion 112. On this basis, the aforementioned first partition 15 is connected to the second housing portion 112. The connection method between the blade assembly 14, the blade mesh 19, the bracket 23 and the decorative part 24 and the bottom wall of the first housing 111 can be referred to the connection method between the blade assembly 14, the blade mesh 19, the bracket 23 and the decorative part 24 and the third cover 18, and will not be repeated here.

[0084] Please refer to the following: Figures 10-12 , Figure 12 for Figure 11The diagram shows a partial view of the cutter head module 10 from another perspective. The protective shell 17 includes multiple covers 173, which are fixed relative to the first shell portion 111 and correspond one-to-one with the magnet assembly 13. Each cover 173 is positioned between a magnet assembly 13 and the first opening 11b, and the magnet assembly 13 is rotatably connected to each cover 173. Specifically, the cover 173 can be connected to the bottom or side wall of the first shell portion 111 via threaded connection, adhesive bonding, or snap-fit. Furthermore, the transmission structure 16 has multiple second rotating shafts 162 corresponding one-to-one with each cover 173 and magnet assembly 13. Each second rotating shaft 162 passes through a cover 173 and connects between a magnet assembly 13 and a blade assembly 14. The connection structure between the second rotating shaft 162 and the blade assembly 14 is described above and will not be repeated here.

[0085] In this way, the cover 173 can prevent the hair cut by the blade assembly 14 from falling into the magnet assembly 13 and becoming difficult to clean. It can also drive the magnet assembly 13 to separate from the second shell 112 simultaneously when the first shell 111 and the second shell 112 separate, making it easier to clean the hair.

[0086] Please continue reading. Figure 12 The multiple covers 173 can be a single structural component. In some examples, the covers 173 can be plastic structural components, and the multiple covers 173 can be a single structural component formed by injection molding or hot-melt process. In other examples, the covers 173 can also be metal structural components, and the multiple covers 173 can be a single structural component formed by welding process. In this way, the connection structure between the multiple covers 173 and the first shell 111 can be simplified, and the assembly efficiency between the multiple covers 173 and the first shell 111 can be improved.

[0087] In other embodiments, the multiple covers 173 may also be separate structural components, with each cover 173 connected to the first shell portion 111. In this way, the allowable manufacturing tolerances for the covers 173 and the first shell portion 111 can be larger, which helps to reduce the manufacturing difficulty of the multiple covers 173 and the first shell portion 111.

[0088] Please refer to the following: Figures 13-15 , Figure 13 for Figure 10 A partial structural schematic diagram of the cutter head module 10 shown. Figure 14 for Figure 13 A partial structural schematic diagram of the cutter head module 10 shown. Figure 15 for Figure 13The cutter head module 10 is shown in a cross-sectional view at CC. As one possible implementation, the second rotating shaft 162 can slide relative to the magnet assembly 13 along the first direction Z. Multiple elastic elements 165 of the transmission structure 16 correspond one-to-one with multiple second rotating shafts 162 and multiple magnet assemblies 13. One elastic element 165 connects one second rotating shaft 162 and one magnet assembly 13, and the elastic element 165 is used to apply a force to the second rotating shaft 162 pointing towards the first opening 11b.

[0089] Specifically, the magnet holder 132 includes a holder body 1321 and a plug 1322. A portion of the holder body 1321 passes through a cover 173. A bearing 133 is fitted between the holder body 1321 and the cover 173 to minimize rotational resistance between them and to limit the movement of the magnet assembly 13 relative to the cover 173 away from the first opening 11b. The holder body 1321 has a third shaft hole 132b and the aforementioned first groove 132a. A second rotating shaft 162 passes through the third shaft hole 132b. The second rotating shaft 162 can slide axially relative to the holder body 1321 along the second rotating shaft 162, but cannot rotate relative to the holder body 1321. Based on this, the plug 1322 is inserted through the third shaft hole 132b and located at the end of the second rotating shaft 162 away from the blade assembly 14. The plug 1322 can be fixed to the fixing frame body 1321 by means of bonding or interference fit. The elastic element 165 is compressed and abuts against the end face of the second rotating shaft 162 and the end face of the plug 1322.

[0090] In this way, the second rotating shaft 162 and the blade assembly 14 can float along the axial direction of the second rotating shaft 162, so that when the multiple blade assemblies 14 cut the hair, they can conform to the user's body contour, thereby improving the cleanliness of the hair cutting.

[0091] Please see Figure 16 , Figure 16 This is a schematic diagram of the structure of a hair cutting device 100 provided in some other embodiments of this application. Figure 16 The illustrated embodiments and Figure 1 The difference in the illustrated embodiment is that there are two blade assemblies 14, and the first housing 11 of the blade module 10 and the second housing 21 of the body 20 are non-detachable structures. Specifically, the second housing portion 112 of the first housing 11 and the second housing 21 can be integrally formed. In this way, the hair cutting device 100 is relatively small and compact, lightweight, and easy to carry.

[0092] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A tool bit module (10) characterized by, include: A first housing (11) having a first receiving cavity (11a) and a first opening (11b) communicating with the first receiving cavity (11a); At least one drive coil assembly (12) is disposed within the first receiving cavity (11a), the drive coil assembly (12) including a drive coil (121); At least one magnet assembly (13), one of the magnet assemblies (13) being disposed opposite to one of the drive coil assemblies (12) and being rotatable about a first axis relative to the first housing (11); the magnet assembly (13) includes a magnet (131); At least one blade assembly (14) is disposed at the first opening (11b) and is connected in a transmission manner to the at least one magnet assembly (13); when the drive coil (121) is energized, it can drive the magnet assembly (13) to rotate around the first axis to drive the blade assembly (14) to rotate relative to the first housing (11).

2. The cutter head module (10) according to claim 1, characterized in that, The magnet assembly (13) includes a plurality of magnets (131) arranged in a ring array around the first axis; the magnets (131) are magnetized along a first direction, and the polarities of the ends of adjacent magnets (131) facing the drive coil (121) are opposite; wherein, the first direction is the arrangement direction of the first opening (11b) and the drive coil assembly (12); and / or, The drive coil assembly (12) includes a plurality of drive coils (121) arranged in a ring array around the first axis.

3. The tool head module (10) according to claim 1 or 2, characterized in that The magnet assembly (13) includes: A magnet holder (132) is connected to the blade assembly (14) via a transmission connection; the magnet holder (132) is a magnetically conductive structural component or a plastic structural component; The magnet (131) is fixed to the magnet holder (132).

4. The cutter head module (10) according to claim 3, characterized in that, The surface of the magnet holder (132) has a first groove (132a); a magnet (131) is embedded in one of the first grooves (132a).

5. The cutter head module (10) according to claim 1 or 2, characterized in that, The distance between the drive coil (121) and the magnet (131) is less than or equal to 2.0 mm.

6. The tool head module (10) according to claim 1 or 2, characterized in that The cutter head module also includes: A first partition (15) is connected to the first housing (11) to divide the first receiving cavity (11a) into a first chamber (11a1) and a second chamber (11a2) that are not interconnected; the driving coil (121) is disposed on the side of the first partition (15) opposite to the first opening (11b) and located in the second chamber (11a2); the magnet assembly (13) is disposed in the first chamber (11a1).

7. The cutter head module (10) according to claim 1 or 2, characterized in that, The number of blade assemblies (14) is multiple; The blade module (10) also includes a transmission structure (16), which is connected to the magnet assembly (13) and the plurality of blade assemblies (14).

8. The tool bit module (10) according to claim 7, characterized in that The transmission structure (16) includes: A first rotating shaft (161) is fixed to the magnet assembly (13), and the axis of the first rotating shaft (161) is collinear with the first axis. A second rotating shaft (162) is connected to one of the blade assemblies (14); A drive gear (163) is fixed to the first rotating shaft (161); Driven gear (164), one of said driven gear (164) is connected to a second rotating shaft (162), and said driven gear (164) meshes with said driving gear (163).

9. The tool bit module (10) according to claim 8, characterized in that The cutter head module also includes: A first support plate (171) is disposed within the first receiving cavity (11a); A first cover (172) is located on the side of the first support plate (171) facing the first opening (11b); the first cover (172) is fixed to the first support plate (171) and together with the first support plate (171) forms a second receiving cavity (17a), the magnet assembly (13) and the transmission structure (16) are located in the second receiving cavity (17a); the first cover (172) has a second opening (172a), a second rotating shaft (162) passes through a second opening (172a) and is connected to a blade assembly (14).

10. The tool bit module (10) according to claim 9, characterized in that The first support plate (171) includes: The support plate body (1711) has a third opening (171b) in which a portion of the magnet assembly (13) is located; The second cover (1712) is connected to the main body of the support plate (1711) and covers the third opening (171b); The second cover (1712) has a first shaft hole (171c), one end of the first rotating shaft (161) is fitted into the first shaft hole (171c) and can rotate relative to the second cover (1712); and / or, the first cover (172) has a second shaft hole (172b), the other end of the first rotating shaft (161) is fitted into the second shaft hole (172b) and can rotate relative to the first cover (172).

11. The tool bit module (10) according to claim 10, characterized in that The cutter head module also includes: A third cover (18) is detachably connected to the first housing (11) and is used to cover the first opening (11b); the third cover (18) has a fourth opening (18a) in which a blade assembly (14) is located; the third cover (18) is fixedly connected to or spaced apart from the first cover (172); A blade mesh (19) is disposed at a fourth opening (18a) and covers a blade assembly (14), the blade mesh (19) being connected to the third cover (18).

12. The cutter head module (10) according to claim 1 or 2, characterized in that, The number of drive coil assemblies (12) and the number of magnet assemblies (13) are both multiple. One magnet assembly (13) is arranged opposite to one drive coil assembly (12), and one blade assembly (14) is drivenly connected to one magnet assembly (13).

13. The cutter head module (10) according to claim 12, characterized in that, The first housing (11) includes a first housing portion (111) and a second housing portion (112), the first housing portion (111) and the second housing portion (112) are detachably connected, the first opening (11b) is located in the first housing portion (111), the magnet assembly (13) is disposed in the first housing portion (111), and the drive coil assembly (12) is disposed in the second housing portion (112); The cutter head module also includes: Multiple covers (173) are fixed relative to the first shell portion (111). One cover (173) covers one of the magnet components (13) and is located between the magnet component (13) and the first opening (11b). One magnet component (13) is rotatably connected to one of the covers (173). The multiple covers (173) are either integral structural components or separate structural components. Multiple second pivots (162), one of which passes through one of the housings (173) and is connected between one of the magnet assemblies (13) and one of the blade assemblies (14).

14. The cutter head module (10) according to claim 13, characterized in that, The second rotating shaft (162) is slidable relative to the magnet assembly (13) along a first direction, the first direction being the arrangement direction of the first opening (11b) and the drive coil assembly (12); The cutter head module also includes a plurality of elastic elements (165), one of which is connected between a second rotating shaft (162) and a magnet assembly (13), and the elastic element (165) is used to apply a force to the second rotating shaft (162) pointing toward the first opening (11b).

15. A hair shearing apparatus (100) characterized by, include: Fuselage (20); The cutter head module (10) is the cutter head module (10) according to any one of claims 1-14, and the cutter head module (10) is mounted on the body (20).

Images