Shaving apparatus

Abstract

The present application discloses a shaver, comprising a cutter head assembly, a gear transmission assembly and a motor arranged in a housing, the motor output shaft drives the cutter head assembly through the gear transmission assembly, the gear transmission assembly is arranged in a sealed cavity, the sealed cavity is filled with lubricating liquid, the lubricating liquid lubricates the gear transmission assembly, the motor output shaft is in transmission cooperation with the lower cooperation end of the gear transmission assembly, the upper cooperation end of the gear transmission assembly is in transmission cooperation with the cutter head assembly, and the sealed cavity is provided with an openable liquid injection hole. The shaver is lubricated by arranging the sealed cavity and injecting the lubricating liquid, so that the friction is reduced, the sound is blocked, the noise emitted by the shaver during operation is reduced, the gear set wear is reduced and the service life is prolonged. And the sealed cavity is separated by the blocking plate in the non-pierced state of the sealed cavity, so that the sealed cavity is separated and rotated, and the sealing performance of the sealed cavity is improved.

Description

Technical Field

[0001] This invention relates to a hair removal device, which mainly includes razors, bald head machines, hair clippers, and hair removal devices for shaving body hair. Background Technology

[0002] Patent CN223270570U discloses a silent gearbox for a shaver, comprising a housing with an interface at the bottom. The key feature is a faceplate mounted on the top of the housing, with a mounting groove on the top of the faceplate. A turntable is rotatably mounted within the mounting groove, with an internal gear ring embedded at the bottom of the turntable and an external gear ring at the top. Multiple second rotating holes are formed at the edge of the faceplate, each containing a rotating shaft with a fine gear mounted on it. This invention, by using an inverted turntable that fully embeds into the mounting groove to form a closed space, can reduce noise at the motor's output shaft. Furthermore, by incorporating an internal gear ring that meshes with the drive gear, the contact area between the two is increased, thereby dispersing the impact force generated during meshing, reducing noise, and decreasing the slippage ratio between them, resulting in smoother meshing and reduced noise caused by vibration. While this silent gearbox structure can reduce noise to some extent, the noise reduction is limited and cannot significantly reduce gear wear. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a shaver that reduces the friction of the gear set and blocks noise by forming a sealed lubricating cavity.

[0004] Therefore, the present invention is implemented using the following technical solution:

[0005] A shaver includes a blade assembly, a gear transmission assembly, and a motor disposed within a housing. The motor output shaft drives the blade assembly via the gear transmission assembly. The gear transmission assembly is disposed within a sealed cavity, which is filled with lubricating fluid. The lubricating fluid lubricates the gear transmission assembly. The motor output shaft engages with the lower mating end of the gear transmission assembly, and the upper mating end of the gear transmission assembly engages with the blade assembly. The sealed cavity has an openable injection hole fitted with a plug.

[0006] Preferably, the gear transmission assembly is disposed in the gear housing, which is formed by an upper plate and a lower plate. The upper plate and the lower plate are interlocked and the mating joint is liquid-sealed. The gear transmission assembly extends upward through the upper through hole on the upper plate to form a rotating shaft one. The upper end of the rotating shaft one has a blade drive end, which drives the blade to rotate. The gear transmission assembly extends downward through the lower through hole on the lower plate to form a rotating shaft two. The motor output shaft is connected to the lower end of the rotating shaft two for transmission. The mating joint between the rotating shaft one and the upper through hole is liquid-sealed, and the mating joint between the rotating shaft two and the lower through hole is liquid-sealed. The motor output shaft 4 is connected to the lower end of the transmission shaft by a helical gear set for transmission.

[0007] Preferably, the lower plate has an integrally formed transfer connecting shell on its lower side. The transfer connecting shell has a transfer placement groove that communicates with the sealed cavity. The bottom of the transfer placement groove has the lower through hole. The second rotating shaft is inserted downward into the transfer placement groove. The motor output shaft passes through the lower through hole and is connected to the helical gear set at the end of the second rotating shaft in the transfer placement groove. The motor output shaft and the inner wall of the lower through hole form a rotatable liquid seal fit.

[0008] Preferably, an annular edge is formed at the lower through hole, and a T-shaped sealing ring is provided on the annular edge and fitted onto the motor output shaft. The cross-section of the T-shaped sealing ring is T-shaped, with a fitting hole in the middle. The side edge of the T-shaped sealing ring is engaged with the upper side of the annular edge, and a middle sealing ring is provided on the upper side of the T-shaped sealing ring for sealing.

[0009] Preferably, a first magnetic transmission assembly is provided between the end of the motor output shaft and the lower mating end of the gear transmission assembly, separated by a barrier plate. The first magnetic transmission assembly includes an upper magnetic component and a lower magnetic component. The motor output shaft drives the lower magnetic component, the lower magnetic component magnetically drives the upper magnetic component through the barrier plate, and the upper magnetic component drives the gear transmission assembly.

[0010] Preferably, the upper mating end of the gear transmission assembly is provided with a second magnetic transmission assembly separated from the cutter head assembly by a barrier plate. The second magnetic transmission assembly includes an upper magnetic component and a lower magnetic component. The gear transmission assembly drives the lower magnetic component, and the lower magnetic component magnetically drives the upper magnetic component through the barrier plate. The upper magnetic component drives the cutter head assembly.

[0011] Preferably, the gear transmission assembly is disposed in a gear housing, which is formed by an upper plate and a lower plate. The upper plate and the lower plate are interlocked, and the mating joint is liquid-sealed. A sleeve is fixedly fitted to the bottom of the lower plate. The sleeve includes a connecting plate that is attached to and fixedly connected to the lower surface of the lower plate. A sleeve is disposed through the center of the connecting plate. The barrier plate is disposed inside the sleeve. The mating joint between the sleeve and the lower plate forms a liquid-sealed mating barrier. The motor output shaft extends into the sleeve and connects to the lower magnetic component of the first magnetic transmission assembly. The lower magnetic component of the first magnetic transmission assembly drives the upper magnetic component through the barrier plate. The upper magnetic component of the first magnetic transmission assembly drives and engages with the helical gear set. The transmission shaft of the helical gear set passes upward through the lower plate and engages with the gear transmission assembly.

[0012] Preferably, the upper plate is covered with a cutter head housing, the motor is disposed in the lower housing, a middle housing is disposed between the lower housing and the lower plate, an outer housing is covered at the sleeve part, the outer housing is sleeved on the lower plate, the middle housing surrounds the upper part of the motor output shaft and the outer housing, and the upper part of the middle housing is sleeved on the upper and lower parts of the outer housing and engages with the lower housing.

[0013] Preferably, the upper and lower magnetic components of the first magnetic drive assembly and the upper and lower magnetic components of the second magnetic drive assembly each include a disk frame and a central shaft. The disk frame has at least three ball bearings that cooperate with the barrier plate, and at least two magnets are spaced apart and embedded in the slots of the disk frame. The upper magnetic component, lower magnetic component, upper magnetic component, and lower magnetic component are all disposed in positioning slots at the top and bottom of the barrier plate. The center of the top and bottom sides of the barrier plate has a positioning blind hole, and the central shaft is inserted into the positioning blind hole.

[0014] Preferably, a sealing plate is fixed below the upper plate, and the sealing plate and the upper plate surround to form a sealed cavity for the upper magnetic component two. The upper magnetic component two and the lower magnetic component two of the second magnetic transmission assembly are located on the upper and lower sides of the sealing plate, respectively. The upper magnetic component two is disposed in the sealed cavity. The sealing plate forms the barrier plate corresponding to the second magnetic transmission assembly. The gear transmission assembly drives the lower magnetic component two, and the lower magnetic component two magnetically drives the upper magnetic component two through the sealing plate. The upper magnetic component two drives the blade drive shaft, and the blade drive shaft passes through the upper plate and engages with the blade head assembly for transmission.

[0015] The beneficial effects of adopting the above technical solution are as follows:

[0016] 1. In traditional electric shavers, noise reduction is typically achieved through modifications to the shape and structure of gear sets. However, the industry consensus generally assumes that the lubricating structure of automotive gearboxes is only suitable for gearboxes in large mechanical equipment such as vehicles, neglecting the beneficial effect of lubrication on noise reduction. This application breaks the shaver's conventional understanding by applying the gear set sealing and lubrication structure originally used in large mechanical equipment to the smaller electric shaver. This improves the smoothness of gear set operation, reduces wear, and lowers noise, while the liquid-sealed cavity further blocks noise, achieving unexpected noise reduction and extended service life.

[0017] 2. The motor of the present invention indirectly drives the gear transmission assembly through the first magnetic transmission assembly via the barrier plate, thereby achieving a seamless seal in the lower transmission part of the sealed cavity. The gear transmission assembly indirectly drives the cutter head assembly through the second magnetic transmission assembly, thereby achieving a seamless seal in the upper transmission part of the sealed cavity. Because the traditional through-shaft transmission is prone to leakage due to frequent rotation over the years, the magnetic transmission structure of this application solves this problem, improves the sealing and noise reduction effect, and further avoids oil leakage from the sealed cavity.

[0018] 3. In this invention, an upper plate, a sealing plate, a lower plate, and a sleeve form a sealed cavity. The sealing plate acts as a barrier to enable the upward transmission of the blade drive shaft. The blade drive shaft passes through the upper plate and engages with the blade head assembly. A separate sealed cavity is formed between the upper plate and the sealing plate to house the upper magnetic component of the second magnetic transmission assembly and the blade drive shaft. The lower magnetic component of the first magnetic transmission assembly drives the upper magnetic component through the barrier of the sleeve. The upper magnetic component of the first magnetic transmission assembly engages with a helical gear set. The transmission shaft of the helical gear set passes upward through the lower plate and engages with the gear transmission assembly. The helical gear set is located within a separate cavity formed between the sleeve and the lower plate. The above structure realizes the layered nesting between the sealing shells, achieving multi-level sealing and isolation. It also has separate gear mounting cavities, upper magnetic component 2, blade drive shaft mounting cavities, and helical gear mounting cavities, which not only achieves efficient transmission and coordination but also allows each component to be separated and operate independently, improving the quietness, sealing effect, and operational stability and durability. Furthermore, it enables modular assembly, facilitating modular replacement and maintenance in the future.

[0019] More importantly, the aforementioned magnetic drive structure significantly improves the liquid sealing performance of the sealed cavity. Traditional gearboxes use a drive shaft extending from the housing for transmission, which inevitably leads to oil leakage. The structure of this application achieves a completely seamless transmission connection (transmission through a baffle plate), realizing complete sealing and solving the oil leakage problem in one fell swoop. The combination of the above magnetic drive structure and the gear set sealing and lubrication structure achieves unexpected technical effects, producing a synergistic effect, mainly reflected in a significant improvement in the gearbox's liquid sealing performance, noise reduction performance, and efficient lubrication and transmission performance. Attached Figure Description

[0020] The present invention includes the following figures:

[0021] Figure 1 This is a cross-sectional view of the shaver provided in Embodiment 1 of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of the part above the motor of the shaver provided in Embodiment 2 of the present invention.

[0023] Figure 3 for Figure 2 A schematic diagram of the AA section.

[0024] Figure 4 for Figure 2 A schematic diagram of the shaver after the housing has been removed.

[0025] Figure 5 for Figure 4 A schematic diagram of the shaver after removing its outer shell.

[0026] Figure 6 for Figure 5 A schematic diagram of the structure of the shaver after the sleeve is removed.

[0027] Figure 7 for Figure 6 A schematic diagram of the structure of the shaver after removing the lower plate, blade cover, and partial blade mesh.

[0028] Figure 8 This is a schematic diagram of the core drive transmission component of the shaver provided by the present invention.

[0029] Figure 9 for Figure 8 A schematic diagram of the structure of the lower magnetic component.

[0030] Figure 10 for Figure 9 Side view. Detailed Implementation

[0031] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0032] Reference Figure 1As shown, the shaver provided in Embodiment 1 of the present invention does not use a barrier plate to block magnetic transmission. Instead, it uses a rotating shaft passing through a sealed cavity and a liquid-sealed connection. Specifically, the shaver includes a blade assembly 1, a gear transmission assembly 2, and a motor disposed in the outer shell. The motor output shaft 4 drives the blade assembly 1 through the gear transmission assembly 2. The gear transmission assembly 2 is disposed in a sealed cavity 5, which is filled with lubricating fluid. The lubricating fluid lubricates the gear transmission assembly 2. The motor output shaft 4 is in transmission engagement with the lower mating end of the gear transmission assembly 2, and the upper mating end of the gear transmission assembly 2 is in transmission engagement with the blade assembly 1. The sealed cavity 5 has an openable injection hole 6, and the injection hole 6 is equipped with a plug 7. The plug 7 with external threads is screwed onto the injection hole 6.

[0033] The gear transmission assembly is disposed in the gear housing 11, which is formed by an upper plate 111 and a lower plate 112. The upper plate 111 and the lower plate 112 are interlocked and the mating joint is liquid-sealed. The gear transmission assembly 2 extends upward through the upper through hole on the upper plate 111 to extend a rotating shaft 28. The upper end of the rotating shaft 28 has a blade drive end, which drives the blade to rotate. The gear transmission assembly 2 extends downward through the lower through hole on the lower plate 112 to extend a rotating shaft 29. The motor output shaft 4 is engaged with the lower end of the rotating shaft 29. The mating joint between the rotating shaft 28 and the upper through hole is liquid-sealed, and the mating joint between the rotating shaft 29 and the lower through hole is liquid-sealed. The mating joint between the upper through hole and the lower through hole is the hole wall. Liquid sealing is usually achieved by fitting sealing rings on the rotating shaft 28 and the rotating shaft 29 and tightly fitting them to the hole wall. The motor output shaft 4 is usually engaged with the lower end of the rotating shaft 29 by a helical gear set 13.

[0034] Reference Figure 10As shown, to further enhance the structural robustness and sealing performance, the lower plate 112 has an integrally formed transfer connecting shell 1121 on its lower side. In the assembled state, the lower surface of the transfer connecting shell 1121 is perpendicular to the motor output shaft 4. The transfer connecting shell 1121 has a transfer mounting groove 1122 that communicates with the sealing cavity 5. The bottom of the transfer mounting groove 1122 has the lower through hole 1123. The rotating shaft 29 is inserted downward into the transfer mounting groove 1122. The motor output shaft 4 passes through the lower through hole 1123 and is connected to the end of the rotating shaft 29. The helical gear set 13 of the motor is connected to the transmission in the transfer mounting groove 1122. The motor output shaft 4 forms a rotatable liquid-sealed fit with the inner wall of the lower through hole 1123. An annular edge 1124 is typically formed at the lower through hole 1123. A T-shaped sealing ring 1125 is provided on the annular edge 1124 and fitted onto the motor output shaft 4. The T-shaped sealing ring 1125 has a T-shaped cross-section with a central fitting hole, appearing annular in top view. The side edge of the T-shaped sealing ring 1125 is engaged with the upper side of the annular edge 1124, and a middle sealing ring 1126 is provided on the upper side of the T-shaped sealing ring 1125 for sealing. In the technical solution of the above embodiment 1, lubrication of the gear transmission assembly 2 is achieved by setting a sealing cavity 5 and injecting lubricating fluid, which reduces wear, decreases noise, and increases the driving force.

[0035] Reference Figure 2-10 As shown, the shaver provided in Embodiment 2 of the present invention includes a blade assembly 1, a gear transmission assembly 2, and a motor disposed within a housing. The motor output shaft 4 drives the blade assembly 1 through the gear transmission assembly 2. The gear transmission assembly 2 is disposed within a sealed cavity 5, and a lubricating fluid is injected into the sealed cavity 5 to lubricate the gear transmission assembly 2. The motor output shaft 4 is in transmission engagement with the lower mating end of the gear transmission assembly 2, and the upper mating end of the gear transmission assembly 2 is in transmission engagement with the blade assembly 1. The sealed cavity 5 has an openable injection hole 6, and a plug 7 is disposed in the injection hole 6. The plug 7 with external threads is screwed onto the injection hole 6. A first magnetic transmission assembly 9 is provided at the end of the motor output shaft 4 and the lower mating end of the gear transmission assembly 2, separated by a barrier plate 8. The first magnetic transmission assembly 9 includes an upper magnetic component 91 and a lower magnetic component 92. The motor output shaft 4 drives the lower magnetic component 92, which magnetically drives the upper magnetic component 91 through the barrier plate 8. The upper magnetic component 91 drives the gear transmission assembly 2. A second magnetic transmission assembly 10 is provided at the upper mating end of the gear transmission assembly 2 and the cutter head assembly 1, separated by the barrier plate 8. The second magnetic transmission assembly 10 includes an upper magnetic component 101 and a lower magnetic component 102. The gear transmission assembly 2 drives the lower magnetic component 102, which magnetically drives the upper magnetic component 101 through the barrier plate 8. The upper magnetic component 101 drives the cutter head assembly 1.

[0036] Reference Figure 2 , Figure 4-7As shown, to achieve complete liquid sealing and multi-layered cavity housing for each component, the gear transmission assembly 2 is disposed within the gear housing 11. The gear housing 11 is formed by an upper plate 111 and a lower plate 112. The lower plate 112 has an upward outer edge, and the upper plate 111 is flat. The outer edges of the upper plate 111 and the lower plate 112 interlock, forming a liquid seal at the mating point. The upper end of the lower plate 112 has a stepped surface, and the upper plate 111 is embedded in the lower step of the stepped surface. Sealant is applied at the mating point. The bottom of the lower plate 112 is flat. A sleeve 12 is fitted and fixed onto the lower plate 112. The sleeve 12 includes a connecting plate 121 that is attached to and fixedly connected to the lower surface of the lower plate 112. A sleeve 122 is inserted through the center of the connecting plate 121. The sleeve 122 is integrally connected to the lower side of the connecting plate 121. The two are integrally formed. The barrier plate 8 is installed inside the sleeve 122. The mating area between the sleeve 12 and the lower plate 112 is sealed with sealant to form a liquid-tight mating barrier. The motor output shaft 4 extends into the sleeve 122 and... The lower magnetic component 92 of the first magnetic transmission assembly 9 is connected. The lower magnetic component 92 of the first magnetic transmission assembly 9 drives the upper magnetic component 91 through the barrier plate 8. The upper magnetic component 91 of the first magnetic transmission assembly 9 drives and cooperates with the helical gear set 13. The transmission shaft 131 of the helical gear set 13 passes upward through the lower plate 112 and is in transmission cooperation with the gear transmission assembly 2. In this embodiment, the upper end of the upper magnetic component 91 forms a left helical gear of the helical gear set 13 and meshes with the right helical gear. The left helical gear and the right helical gear together constitute the helical gear set 13. The upper plate 111 is covered with a cutter head housing 14. The motor is disposed in the lower housing. A middle housing 16 is disposed between the lower housing and the lower plate 112. An outer housing 17 is covered at the sleeve 12. The outer housing 17 is sleeved on the lower plate 112. The middle housing 16 surrounds the upper part of the motor output shaft 4 and the outer housing 17. The upper part of the middle housing 15 is sleeved on the outer housing 17, and the lower part is engaged with the lower housing.A sealing plate 19 is fixed below the upper plate 111. The mating area between the sealing plate 19 and the upper plate 111 is surrounded by sealant to form a sealed cavity 30 for the upper magnetic component 101. The number of sealed cavities 30 corresponds one-to-one with the number of blade assemblies. The upper magnetic component 101 and lower magnetic component 102 of the second magnetic transmission assembly 10 are located on the upper and lower sides of the sealing plate 19, respectively. The upper magnetic component 101 is disposed within the sealed cavity. The sealing plate 19 corresponds to the second magnetic transmission assembly 10. The barrier plate 8 is formed at the moving component 10. The gear transmission component 2 drives the lower magnetic component 102, which magnetically drives the upper magnetic component 101 through the sealing plate 19. The upper magnetic component 101 drives the blade drive shaft 20. In this embodiment, the blade drive shaft 20 is an upward extension of the central shaft 22. The lower magnetic component 102 drives the cutter head assembly 1 via the central shaft 22 and the blade drive shaft 20. The blade drive shaft 20 passes through the upper plate 111 and is in transmission cooperation with the cutter head assembly 1. The upper plate 111, the sealing plate 19, the lower plate 112, and the sleeve component 12 together surround and form a sealed cavity 5. The position on the upper plate 111 where the blade drive shaft 20 passes is surrounded by the sealed surrounding cavity 30, forming a liquid-sealed barrier.

[0037] Reference Figure 2 , Figure 5-9 As shown, in order to achieve efficient transmission between the magnetic drive components and the barrier plates, the upper magnetic component 91 and lower magnetic component 92 of the first magnetic drive component 9 and the upper magnetic component 101 and lower magnetic component 102 of the second magnetic drive component 10 both include a disk frame 21 and a central shaft 22. The central shaft 22 and the disk frame 21 are fixed to each other. The disk frame 21 has at least three balls 23 that cooperate with the barrier plate 8. Typically, 6-10 balls are provided. The balls 23 are embedded in the recesses of the disk frame 21. The balls 23 on both sides of the barrier plate 8 are clamped onto the barrier plate 8 due to the mutual attraction of the upper and lower magnetic components. The balls 23 and the barrier plate 8 roll in cooperation, avoiding direct friction between the disk frame 21 and the barrier plate 8, making the rotation of the upper and lower magnetic components smoother. At least two magnets 24 are spaced apart and embedded in the slots 25 of the disk frame 21. In this embodiment, one magnet 24 is provided on each side. The upper magnetic component 91, lower magnetic component 92, upper magnetic component 101, and lower magnetic component 102 are all disposed in the positioning grooves 26 at the top and bottom of the barrier plate 8. The center of the upper and lower sides of the barrier plate 8 is provided with positioning blind holes 27. The central shaft 22 is inserted into the positioning blind holes 27. The structure of the central shaft 22 being inserted into the positioning blind holes 27 is conducive to maintaining the stable and efficient rotation of the upper and lower magnetic components.

[0038] Reference Figure 1-9As shown, in order to more clearly illustrate the structural relationship of the shaver provided in Embodiment 2 of the present invention, its driving relationship is described in detail below: The motor drives the lower magnetic component 92 of the first magnetic transmission assembly 9 via the motor output shaft 4. The lower magnetic component 92 drives the upper magnetic component 91 through the barrier plate 8 on the sleeve component 12. The upper magnetic component 91 drives the helical gear set 13. The transmission shaft 131 of the helical gear set 13 passes through the lower plate 112 and is connected to the gear transmission assembly 2 for transmission. The gear transmission assembly 2 drives the lower magnetic component 102 of the second magnetic transmission assembly 10 upward. The lower magnetic component 102 drives the upper magnetic component 101 through the sealing plate 19. The upper magnetic component 101 drives the blade drive shaft 20. The blade drive shaft 20 passes through the upper plate 111 and is connected to the blade head assembly 1 for transmission. The second magnetic transmission assembly 10 and the blade head assembly 1 usually have 2-3 sets, forming the upper shaver head.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. The above preferred embodiments of the present invention are not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A shaver, comprising a blade assembly, a gear transmission assembly, and a motor disposed within a housing, wherein the motor output shaft drives the blade assembly via the gear transmission assembly, characterized in that: The gear transmission assembly is disposed in a sealed cavity, and the sealed cavity is filled with lubricating fluid. The lubricating fluid lubricates the gear transmission assembly. The motor output shaft is in transmission engagement with the lower mating end of the gear transmission assembly, and the upper mating end of the gear transmission assembly is in transmission engagement with the cutter head assembly. The sealed cavity has an openable injection hole, which is equipped with a plug. The gear transmission assembly is housed within a gear housing, which is formed by an upper plate and a lower plate. The upper and lower plates interlock, and the mating joint is liquid-sealed. The gear transmission assembly extends upward through an upper through-hole on the upper plate, extending a rotating shaft one. The upper end of the rotating shaft one has a blade drive end, which drives the blade to rotate. The gear transmission assembly extends downward through a lower through-hole on the lower plate, extending a rotating shaft two. The motor output shaft is engaged with the lower end of the rotating shaft two. The mating joint between the rotating shaft one and the upper through-hole is liquid-sealed, and the mating joint between the rotating shaft two and the lower through-hole is liquid-sealed. The lower end of the motor output shaft and the transmission shaft are engaged by a helical gear set for transmission.

2. The shaver according to claim 1, characterized in that: The lower plate has an integrally formed transfer connection shell on its lower side. The transfer connection shell has a transfer placement groove that communicates with the sealed cavity. The bottom of the transfer placement groove has the lower through hole. The second rotating shaft is inserted downward into the transfer placement groove. The motor output shaft passes through the lower through hole and is connected to the helical gear set at the end of the second rotating shaft in the transfer placement groove. The motor output shaft and the inner wall of the lower through hole form a rotatable liquid seal fit.

3. The shaver according to claim 2, characterized in that: An annular edge is formed at the lower through hole, and a T-shaped sealing ring is set on the annular edge and fitted onto the motor output shaft. The cross-section of the T-shaped sealing ring is T-shaped with a fitting hole in the middle. The side edge of the T-shaped sealing ring is stuck on the upper side of the annular edge, and a middle sealing ring is set on the upper side of the T-shaped sealing ring for sealing.

4. The shaver according to claim 1, characterized in that: A first magnetic transmission assembly is provided at the end of the motor output shaft and the lower mating end of the gear transmission assembly, separated by a barrier plate. The first magnetic transmission assembly includes an upper magnetic component and a lower magnetic component. The motor output shaft drives the lower magnetic component, and the lower magnetic component magnetically drives the upper magnetic component through the barrier plate. The upper magnetic component drives the gear transmission assembly.

5. The shaver according to claim 4, characterized in that: The upper mating end of the gear transmission assembly is provided with a second magnetic transmission assembly separated from the cutter head assembly by a barrier plate. The second magnetic transmission assembly includes an upper magnetic component and a lower magnetic component. The gear transmission assembly drives the lower magnetic component, and the lower magnetic component magnetically drives the upper magnetic component through the barrier plate. The upper magnetic component drives the cutter head assembly.

6. The shaver according to claim 5, characterized in that: The gear transmission assembly is housed within a gear housing, which is formed by an upper plate and a lower plate. The upper and lower plates interlock, forming a liquid seal at the joint. A sleeve is fixedly fitted to the bottom of the lower plate. The sleeve includes a connecting plate that is attached to and fixedly connected to the lower surface of the lower plate. A sleeve extends through the center of the connecting plate, and the barrier plate is installed inside the sleeve. The joint between the sleeve and the lower plate forms a liquid seal. The motor output shaft extends into the sleeve and connects to the lower magnetic component of the first magnetic transmission assembly. The lower magnetic component of the first magnetic transmission assembly drives the upper magnetic component through the barrier plate. The upper magnetic component of the first magnetic transmission assembly engages with a helical gear set. The transmission shaft of the helical gear set passes upward through the lower plate and engages with the gear transmission assembly.

7. The shaver according to claim 6, characterized in that: The upper plate is covered with a cutter head housing, the motor is disposed in the lower housing, a middle housing is disposed between the lower housing and the lower plate, an outer housing is covered at the sleeve part, the outer housing is sleeved on the lower plate, the middle housing surrounds the upper part of the motor output shaft and the outer housing, the upper part of the middle housing is sleeved on the upper and lower parts of the outer housing and engages with the lower housing.

8. The shaver according to claim 5, 6, or 7, characterized in that: The first magnetic drive assembly's upper and lower magnetic components, as well as the second magnetic drive assembly's upper and lower magnetic components, each include a disk frame and a central shaft. The disk frame has at least three ball bearings that cooperate with the barrier plate, and at least two magnets are spaced apart and embedded in the slots of the disk frame. The upper magnetic component, lower magnetic component, upper magnetic component, and lower magnetic component are all located in positioning slots at the top and bottom of the barrier plate. The center of the top and bottom sides of the barrier plate has a positioning blind hole, and the central shaft is inserted into the positioning blind hole.

9. The shaver according to claim 6 or 7, characterized in that: A sealing plate is fixed below the upper plate, and the sealing plate and the upper plate surround to form a sealed cavity for the upper magnetic component two. The upper magnetic component two and the lower magnetic component two of the second magnetic transmission assembly are located on the upper and lower sides of the sealing plate, respectively. The upper magnetic component two is disposed in the sealed cavity. The sealing plate forms the barrier plate corresponding to the second magnetic transmission assembly. The gear transmission assembly drives the lower magnetic component two, and the lower magnetic component two magnetically drives the upper magnetic component two through the sealing plate. The upper magnetic component two drives the blade drive shaft, and the blade drive shaft passes through the upper plate and is in transmission cooperation with the blade head assembly.

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