Pendulum type reciprocating rotation trimming cutter head and shaver

Abstract

The pendulum type reciprocating rotation trimming cutter head and the shaver are characterized in that a rotating shaft is arranged in a static cutter holder, the rotating shaft penetrates through a moving cutter, the two ends of the rotating shaft are connected with the static cutter holder, and the moving cutter, the static cutter and the static cutter holder are combined into an integrally assembled and disassembled whole; the moving cutter is in transmission connection with the driving mechanism, and the driving mechanism linearly swings in a reciprocating mode to drive the moving cutter to form pendulum type reciprocating rotation along the inner surface of the static cutter with the axis of the rotating shaft as the reference from the orthographic projection direction of any one of the two ends of the static cutter holder. The hair trimmer has the beneficial effects that the moving cutter is driven by linear reciprocating swing of the driving mechanism to rotate back and forth in a pendulum manner along the inner surface of the static cutter by taking the axis of the rotating shaft as a reference so as to trim hairs such as beards. Therefore, the power driving direction of the driving mechanism is different from the actual movement direction of the movable cutter, when the movable cutter rotates towards any side of the rotating shaft, inertial impact force cannot be formed, the vibration sense and the working noise in the working process can be remarkably reduced, and therefore the operation hand feeling and comfort of a user in the using process are improved.

Description

Technical Field

[0001] This invention relates to a hair trimming device, and more specifically to a pendulum-type reciprocating rotary trimming head and razor, mainly used in the field of personal care tools such as razors and hair removal devices. Background Technology

[0002] Existing razors, excluding manual razors, mainly come in two types: reciprocating oscillating razors and rotary razors. The reciprocating oscillating type converts the motor's rotational motion into linear reciprocating motion, driving the moving blade to oscillate back and forth along the inner surface of the stationary blade to trim the beard. The rotary type has a simpler structure, directly using the motor's output shaft to drive the moving blade to rotate along the inner surface of the stationary blade, thus trimming the beard.

[0003] While reciprocating shavers are effective at trimming both soft and hard hairs, their vibration and noise levels are relatively high, resulting in a poor user experience. Rotary shavers, on the other hand, have less vibration and lower noise, but they are less effective at trimming hard beards, limiting their usability. Therefore, there is a pressing need in the market for a shaver that offers low vibration and noise while effectively trimming both soft and hard beards. Summary of the Invention

[0004] To address the above technical problems, this invention provides a pendulum-type reciprocating rotary trimmer head and razor. This razor not only has less vibration and lower operating noise, but also meets various application scenarios for trimming soft and hard beards, improving the user experience.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is a pendulum-type reciprocating rotary trimmer head, including a stationary blade and a stationary blade seat for mounting the stationary blade. The moving blade is placed in the stationary blade seat and always maintains contact with the inner surface of the stationary blade under the action of external force to form a shearing force. A rotating shaft is provided in the stationary blade seat, which passes through the moving blade and its two ends are respectively connected to the stationary blade seat, combining the moving blade, the stationary blade, and the stationary blade seat into a whole for assembly and disassembly. The moving blade is connected to the drive mechanism for transmission, and when viewed from the orthographic projection direction of either end of the stationary blade seat, the drive mechanism reciprocates linearly, driving the moving blade to reciprocate in a pendulum-like manner along the inner surface of the stationary blade with the axis of the rotating shaft as the reference.

[0006] Preferably, with the axis of rotation as a reference, the drive mechanism drives the moving blade to rotate along the axis of rotation by a single-sided rotation angle α of less than 45° to form a pendulum-type reciprocating cutting fan-shaped surface of less than 90°.

[0007] Preferably, a drive groove is provided at the bottom of the moving blade. The drive groove is inclined with respect to the axis of rotation. The drive mechanism is placed in the drive groove and squeezes the inclined wall of the drive groove when the drive mechanism swings back and forth, so that the moving blade rotates in a pendulum-like manner along the inner surface of the stationary blade with respect to the axis of rotation.

[0008] Preferably, the drive groove at the bottom of the moving blade is based on the axis of the rotating shaft, and its inclination angle b is greater than 5° and less than or equal to 85°.

[0009] Preferably, the reciprocating swing stroke of the drive mechanism is less than the length of the drive groove.

[0010] Preferably, the moving tool includes a moving blade and a moving tool holder. The moving blade is fixed on the moving tool holder, and the rotating shaft passes through the moving tool holder and its two ends are respectively connected to the stationary tool holder, so that the stationary tool, stationary tool holder, moving blade and moving tool holder are combined into a whole that can be disassembled and assembled; wherein, the driving groove is set at the bottom of the moving tool holder.

[0011] Preferably, a limiting structure is provided on the rotating shaft to horizontally limit the moving tool.

[0012] Preferably, through holes are provided on the side walls at both ends of the stationary tool holder. The width of the through holes matches the outer diameter of the rotating shaft, and the length is greater than the outer diameter of the rotating shaft, so that when an external force is applied to the stationary tool, the moving tool can move up and down along the axial direction of the stationary tool holder with the rotating shaft.

[0013] Preferably, the stationary blade includes a mesh sheet and a connecting piece. The edges of both ends of the mesh sheet are connected to the connecting piece as a whole. The connecting piece is provided with at least one axial sliding hole. The axial sliding hole is sleeved on the hooks provided on the inner walls of both sides of the stationary blade seat, so that the stationary blade and the stationary blade seat are detachably connected. When an external force is applied to the stationary blade, the connecting piece can drive the mesh sheet to move axially up and down relative to the stationary blade seat.

[0014] Based on the aforementioned trimming head, this application also proposes a razor technical solution, including a body and the aforementioned pendulum-type reciprocating trimming head, wherein the trimming head is detachably connected to the body as a whole, and the drive mechanism is fixed inside the body.

[0015] The beneficial effect of this invention is that the moving blade, driven by the linear reciprocating oscillation of the drive mechanism, rotates in a pendulum-like manner along the inner surface of the stationary blade, with the axis of the rotating shaft as the reference, to trim hairs such as beards. It is evident that the power driving direction of the drive mechanism is not the same as the actual movement direction of the moving blade. This means that when the moving blade rotates to either side of the rotating shaft, no inertial impact force is generated. Therefore, it can significantly reduce the vibration felt during operation. Simultaneously, the operating noise is also reduced, effectively improving the user's operating feel and comfort. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the pendulum-type reciprocating rotary trimmer head according to an embodiment of the present invention.

[0017] Figure 2 This is a three-dimensional sectional view of the pendulum-type reciprocating rotary trimmer head according to an embodiment of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the stationary tool holder in an embodiment of the present invention.

[0019] Figure 4 This is a three-dimensional sectional view of the stationary tool holder in an embodiment of the present invention.

[0020] Figure 5 This is a three-dimensional structural diagram of the moving blade in an embodiment of the present invention.

[0021] Figure 6 This is a bottom-view perspective view of the moving blade in an embodiment of the present invention.

[0022] Figure 7 This is a bottom view of the moving blade in an embodiment of the present invention.

[0023] Figure 8 This is a cross-sectional view of the pendulum-type reciprocating rotary trimmer head according to an embodiment of the present invention, showing the moving blade rotating to the left.

[0024] Figure 9 This is a cross-sectional view of the pendulum-type reciprocating rotary trimmer head according to an embodiment of the present invention, showing the moving blade rotating to the right.

[0025] Figure 10 This is a three-dimensional structural diagram of the shaver according to an embodiment of the present invention.

[0026] Figure 11 This is a cross-sectional view of the shaver according to an embodiment of the present invention.

[0027] Figure 12 This is a three-dimensional structural diagram of the shaver body according to an embodiment of the present invention.

[0028] Figure 13 This is a three-dimensional structural diagram of the transmission connection between the drive mechanism and the moving blade in an embodiment of the present invention.

[0029] Figure 14 This is a planar sectional view of the transmission connection between the drive mechanism and the moving blade in an embodiment of the present invention.

[0030] Figure 15 This is a three-dimensional structural diagram of the connector in an embodiment of the present invention.

[0031] Figure 16 This is a three-dimensional structural diagram of the swing frame in an embodiment of the present invention. Detailed Implementation

[0032] The following is in conjunction with the appendix Figures 1-16 Further explanation of the embodiments of the present invention:

[0033] Due to individual differences, some men have softer beard hairs, while others have relatively coarser hairs. Therefore, existing razors are mainly divided into two types based on their working mode (excluding manual razors). The first is the linear reciprocating oscillating type (which can also be understood as horizontal reciprocating oscillating), which has strong power and can meet the needs of most people with coarser beard hairs. However, its disadvantages are that the vibration is also very strong, and the operating noise is relatively loud, resulting in a relatively poor user experience. The second type is the rotary type, which is popular among users due to its gentle vibration and low operating noise. While it can ensure a good trim when dealing with softer beard hairs, it is less effective at trimming coarser beard hairs, thus having certain limitations in its use.

[0034] Based on this, the present invention proposes a razor different from the two modes mentioned above, namely: a pendulum-type reciprocating rotary trimming head, including a stationary blade 1 and a stationary blade seat 2 for mounting the stationary blade 1. The stationary blade 1 has several spaced meshes for guiding beard hairs. The moving blade 3 is placed inside the stationary blade seat 2 and, under the action of external force, always maintains contact with the inner surface of the stationary blade 1 to generate shearing force. When the beard hairs penetrate into the stationary blade 1, the moving blade 3 can cut off the beard hairs.

[0035] To provide a low-vibration, low-noise trimming solution that can simultaneously meet the trimming needs of both soft and hard beards, the following technical improvement is adopted in this application: A rotating shaft 4 is provided inside the stationary blade holder 2. The rotating shaft 4 passes through the moving blade 3, and its two ends are respectively connected to the stationary blade holder 2, combining the moving blade 3, the stationary blade 1, and the stationary blade holder 2 into a single unit that can be assembled and disassembled. The moving blade 3 is connected to a drive mechanism 5, and viewed from either end of the stationary blade holder 2 (which can also be understood as the width direction of the trimmer head), the drive mechanism 5 reciprocates linearly, driving the moving blade 3 to rotate in a pendulum-like reciprocating motion along the inner surface of the stationary blade 1 with the axis of the rotating shaft 4 as a reference. By adding a rotating shaft 4 inside the stationary blade holder 2 and using the rotating shaft 4 to combine the moving blade 3 with the stationary blade holder 2 and the stationary blade 1 into a single unit that can be assembled and disassembled. This structure can produce at least the following technical effects:

[0036] Firstly, it avoids the need for users to assemble individual parts, thus improving assembly efficiency. Secondly, if users need to clean or maintain the trimmer head after use (to remove stubble or hair), it can be disassembled as a whole for easy cleaning and maintenance.

[0037] Secondly, since the rotating shaft 4 installs the moving blade 3 inside the stationary blade holder 2, the corresponding stationary blade 1 can protect the moving blade 3, preventing external objects from directly contacting the blade of the moving blade 3, ensuring the cutting sharpness of the moving blade 3, and extending the service life of the blade of the moving blade 3.

[0038] Thirdly, the moving blade 3 is installed in the stationary blade holder 2 using the rotating shaft 4. The height and direction of the moving blade 3 in the stationary blade holder 2 are constant. This can effectively improve the fit between the moving blade 3 and the stationary blade 1, and prevent gaps or deflections in the height or direction of the moving blade 3 due to assembly errors, which would affect the cutting sharpness between the moving blade 3 and the stationary blade 1.

[0039] Fourth, under the constraint of the rotating shaft 4, the shearing force formed between the moving blade 3 and the stationary blade 1 is preset according to the design requirements. At this time, the frictional resistance between the moving blade 3 and the stationary blade 1 will not change due to the change in the axial position of the moving blade 3. This avoids the frictional resistance from excessively squeezing the stationary blade 1 by the moving blade 3, prevents the surface temperature of the stationary blade 1 from rising too high and burning the user's skin, and improves the safety and comfort of using the trimmer head and shaver.

[0040] Fifth, the moving blade 3, driven by the linear reciprocating oscillation of the drive mechanism 5, rotates in a pendulum-like manner along the inner surface of the stationary blade 1 with the axis of the rotating shaft 4 as the reference to trim hairs such as beards. It is evident that the power driving direction of the drive mechanism 5 is not the same as the actual movement direction of the moving blade 3. This means that when the moving blade 3 rotates to either side of the rotating shaft 4 or switches its rotation direction, no inertial impact force is generated. Therefore, the vibration during operation is significantly reduced. Simultaneously, the operating noise is also reduced, effectively improving the user's operating feel and comfort.

[0041] To improve the cutting effect of the trimmer head, with the axis of the rotating shaft 4 as the reference, the drive mechanism 5 drives the moving blade 3 to rotate along the rotating shaft 4 at a single-sided rotation angle α of less than 45°, forming a pendulum-like reciprocating cutting fan-shaped area S of less than 90°. In the structural design, the design is primarily based on the size of the space within the stationary blade holder 2. Two main factors influence the size of this space: firstly, the actual width of the stationary blade holder 2; the larger the width, the larger the space within it, and consequently, the larger the single-sided rotation angle α of the moving blade 3 relative to the axis of the rotating shaft 4. Secondly, the actual width of the moving blade 3; with the width of the stationary blade holder 2 remaining constant, a larger moving blade 3 has a smaller space to rotate along the rotating shaft 4, and vice versa.

[0042] In this embodiment, to balance the beard trimming efficiency and the working noise during beard cutting, the drive mechanism 5 drives the moving blade 3 to rotate along the rotating shaft 4. The single-sided rotation angle α is preferably less than 15°, forming a pendulum-shaped reciprocating cutting fan-shaped surface S of less than 30°. Setting the single-sided rotation angle α of the moving blade 3 to less than 15° ensures beard trimming performance while preventing the moving blade 3 from impacting the inner wall of the stationary blade seat 2 during reciprocating rotation with the rotating shaft 4 as the reference. This reduces working noise while maximizing the reciprocating cutting fan-shaped surface S of the moving blade 3, thus improving the beard trimming efficiency of the trimmer head. Alternatively, the single-sided rotation angle α of the moving blade 3 with the axis of the rotating shaft 4 as the reference can be set to 5° or 30°. Setting it to 5° reduces the reciprocating cutting fan-shaped surface S of the moving blade 3, resulting in reduced surface utilization of the stationary blade 1 and decreased beard trimming efficiency. While setting the angle to 30° would improve the surface utilization of the stationary blade 1, it would also easily cause the moving blade 3 to touch the inner wall of the stationary blade holder 2 during reciprocating rotary cutting, resulting in increased operating noise and affecting user comfort. Therefore, a preferred implementation is for the moving blade 3 to rotate 15° on one side of the inner surface of the stationary blade 1 with the axis of the rotating shaft 4 as a reference.

[0043] To achieve the pendulum-like reciprocating rotation of the moving blade 3 relative to the stationary blade 1, a drive groove 33 is provided at the bottom of the moving blade 3. This drive groove 33 is inclined relative to the axis of the rotating shaft 4. The drive mechanism 5 is placed inside the drive groove 33, and the reciprocating motion of the drive mechanism 5 presses against the inclined wall of the drive groove 33, causing the moving blade 3 to reciprocate in a pendulum-like manner along the inner surface of the stationary blade 1 with the axis of the rotating shaft 4 as the reference. Since the drive mechanism 5 converts the rotational motion of the motor 51 into linear reciprocating motion, by providing an inclined drive groove 33 at the bottom of the moving blade holder 32, when the drive mechanism 5 reciprocates linearly, it pushes back and forth against the two inclined walls inside the drive groove 33, thereby causing the moving blade 3 to reciprocate in both directions along the inner surface of the stationary blade 1 with the axis of the rotating shaft 4 as the reference, thus cutting off the beard hairs that extend into the stationary blade 1, achieving the beard trimming function.

[0044] In a specific embodiment, the drive groove 33 at the bottom of the moving blade 3 is referenced to the axis of the rotating shaft 4, and its inclination angle b is greater than 5° and less than or equal to 85°. Since the inclination angle b of the drive groove 33 is directly related to the cutting angle of the moving blade 3's reciprocating rotation with the rotating shaft 4 as the reference, if the inclination angle b of the drive groove 33 is set too small or too large (such as 1°, 2° or 89°, etc.), the two opposite sidewalls in the drive groove 33 will be close to straight lines. Consequently, the cutting angle of the moving blade 3's pendulum-like reciprocating rotation will be negligible. This will not only fail to cooperate with the stationary blade 1 to cut the beard inserted into the stationary blade 1, but will also cause the pendulum-like cutting fan S of the moving blade 3 to be too narrow, reducing the beard trimming efficiency. Secondly, if the inclination angle b is set too small or too large, the two sidewalls of the drive groove 33 will also be close to vertical, which will block the straight reciprocating direction of the drive mechanism 5. This will prevent the moving blade 3 from reciprocating in a pendulum-like motion with the axis of the rotating shaft 4 as the reference, and instead cause the moving blade 3 to swing left and right along the axis of the rotating shaft 4.

[0045] In this embodiment, the tilt angle b of the drive groove 33 is set to be greater than 5° and less than or equal to 85°. This is the minimum angle value at which the moving blade 3 forms a pendulum-like reciprocating rotation along the inner surface of the stationary blade 1 with the axis of the rotating shaft 4 as the reference. The preferred angle range is greater than 30° and less than 60° as the optimal tilt angle b. The actual implemented tilt angle b is 45°. The specific tilt value can also be determined according to the actual width of the stationary blade seat 2 or the moving blade 3. In this embodiment, no further restrictions are imposed.

[0046] To prevent the moving blade 3 from shifting left and right along the axis of the rotating shaft 4 when the drive mechanism 5 pushes against the two inclined walls of the drive groove 33, the reciprocating swing stroke of the drive mechanism 5 is less than the length of the drive groove 33. The length of the drive groove 33 is set to be greater than the reciprocating swing stroke of the drive mechanism 5. When the drive mechanism 5 pushes against the two inclined walls of the drive groove 33 in a straight reciprocating swing, driving the moving blade 3 to rotate in a pendulum-like manner along the inner surface of the stationary blade 1 with the axis of the rotating shaft 4 as the reference, the drive mechanism 5 will not directly contact the end faces at both ends of the drive groove 33. In this way, there is no force on the moving blade 3 in the direction of the axis of the rotating shaft 4, and it will not shift left and right along the direction of the axis of the rotating shaft 4, thus ensuring the beard trimming performance between the moving blade 3 and the stationary blade 1.

[0047] When trimming a beard, a moving blade 3 and a stationary blade 1 are needed in conjunction. Both the moving blade 3 and the stationary blade 1 must achieve a certain level of rigidity to create sufficient sharpness to cut the beard. Therefore, the stationary blade 1 and the moving blade 3 are generally made of metal or ceramic. In actual production, considering the brittleness and fragility of ceramic, the stationary blade 1 and the moving blade 3 are generally made of metal. To reduce the production cost of the moving blade 3, it includes a moving blade 31 and a moving blade holder 32. The moving blade 31 is made of metal, while the moving blade holder 32 can be made of plastic. This not only reduces the overall production cost of the moving blade 3 but also utilizes the plasticity of plastic to facilitate the installation and fixation of the moving blade 31. In specific implementations, the moving blade 31 can be configured as several separate semi-circular pieces arranged at intervals on the moving blade holder 32, or it can be a single piece bent into a U-shape and fixedly installed on the moving blade holder 32. The actual choice of structure depends on user needs or design requirements, and this embodiment does not impose further limitations.

[0048] Since the moving blade 31 is fixedly mounted on the moving blade holder 32, the rotating shaft 4 can pass through the moving blade holder 32 and connect to the stationary blade holder 2 at both ends, thus assembling the stationary blade 1, stationary blade holder 2, moving blade 31, and moving blade holder 32 into a single unit that can be easily disassembled and assembled. By combining the stationary blade 1, stationary blade holder 2, moving blade 31, and moving blade holder 32 into a single trimming head, the user can quickly assemble the trimming head onto the shaver body 6, improving assembly efficiency, user convenience, and user experience. When cleaning and maintenance are required after use, the single trimming head can also be quickly disassembled for easy cleaning, improving the convenience of cleaning and maintenance and extending the service life of the trimming head. To facilitate the manufacturing of the drive groove 33, it is located at the bottom of the moving blade holder 32 and is integrally injection molded, improving manufacturing efficiency.

[0049] To prevent the moving blade 3 from axially displacing along the rotating shaft 4 when the drive mechanism 5 drives the moving blade holder 32 to reciprocate around the inner surface of the stationary blade 1 with the rotating shaft 4 as the reference, a limiting structure 41 is provided on the rotating shaft 4 to horizontally limit the moving blade 3. By setting the limiting structure 41 on the rotating shaft 4, when the drive mechanism 5 drives the moving blade 3 to reciprocate during its reciprocating swing, the limiting structure 41 can horizontally limit the moving blade 3, effectively preventing the moving blade 3 from axially displacing along the rotating shaft 4, and ensuring the rotational trimming performance and trimming efficiency between the moving blade 3 and the stationary blade 1. In specific implementation, the limiting structure 41 can be a stepped structure. For example, the outer diameter of the rotating shaft 4 inside the moving blade 3 is relatively small, while the outer diameter of the rotating shaft 4 outside both ends of the moving blade 3 is increased. The change in the diameter of the rotating shaft 4 is used to horizontally limit the moving blade 3, preventing the moving blade 3 from horizontally displacing along the rotating shaft 4. Alternatively, a rotating shaft 4 with the same outer diameter can be selected. A groove 411 and a retaining ring 412 can be provided on the rotating shaft 4 at both ends of the moving tool 3. The retaining ring 412 is engaged in the groove 411, which also prevents the moving tool 3 from horizontally displacing along the axial direction of the rotating shaft 4. Since the retaining ring 412 is a standard part and easy to procure, selecting the groove 411 and retaining ring 412 is the preferred embodiment.

[0050] During the trimming of beards and other hair, in order to cut the beard from the root as much as possible, users often press the machine body hard to make the trimmer head squeeze the skin. At this time, the stationary blade 1 will bend and deform under the pressure of the skin. In order to prevent the moving blade 3 from breaking the stationary blade 1 or the blade of the moving blade 3 from breaking, through holes 21 are provided on the side walls at both ends of the stationary blade seat 2. The width of the through hole 21 matches the outer diameter of the rotating shaft 4, and the length is greater than the outer diameter of the rotating shaft 4, so that when an external force is applied to the stationary blade 1, the moving blade 31 and the moving blade seat 32 in the moving blade 3 can move up and down along the axis of the stationary blade seat 2 with the rotating shaft 4. By setting the length of the through hole 21 to be greater than the outer diameter of the rotating shaft 4 to form an elongated hole, when the stationary knife 1 is subjected to skin pressure, the moving blade 31, the moving knife seat 32, and the rotating shaft 4 in the moving knife 3 can move up and down along the vertical direction of the through hole 21, providing buffer space for the bending deformation of the stationary knife 1, thereby preventing the moving blade 31 from breaking the stationary knife 1 or the blade of the moving blade 31 from breaking, improving the safety of the use of the stationary knife 1 and the moving blade 31 and extending the service life of the stationary knife 1 and the moving blade 31.

[0051] To prevent the static blade 1 from bulging and deforming on both sides when subjected to skin pressure, thus affecting its beard trimming performance, the static blade 1 includes a mesh 11 and a connecting piece 12. The two ends of the mesh 11 are integrally connected to the connecting piece 12. The connecting piece 12 has at least one axial sliding hole 13, which is fitted onto the hooks 22 provided on the inner walls of both sides of the static blade holder 2, allowing the static blade 1 and the static blade holder 2 to be detachably and movablely connected. When an external force is applied to the static blade 1, the connecting piece 12 can drive the mesh 11 to move axially up and down relative to the static blade holder 2. By making the static blade 1 a separate unit and forming a detachable and movable connection with the static blade holder 2 through the connecting piece 12, when the static blade 1 is subjected to external force, the mesh 11, connecting piece 12, moving blade 31, moving blade holder 32, and rotating shaft 4 will all move axially downward relative to the static blade holder 2, reducing the bulging and deformation of the side walls of the static blade 1 and improving the safety of using the static blade 1 and the moving blade 3. When the external force disappears, under the action of the drive mechanism 5, the rotating shaft 4, the moving knife holder 32 and the moving blade 31 can all move upward along the axis of the stationary knife holder 2 synchronously. At the same time, the moving blade 31 can simultaneously support the mesh 11 in the stationary knife 1, so that the mesh 11 and the connecting piece 12 can automatically reset together.

[0052] Based on the aforementioned trimming head, this application also proposes a shaver technical solution, including a body 6 and the aforementioned pendulum-type reciprocating trimming head. The trimming head is detachably connected to the body 6 as a whole, and the drive mechanism 5 is fixed inside the body 6. In actual production, hook grooves 23 are respectively provided on the inner walls of both ends of the stationary blade holder 2, and spring-loaded blocks 61 are respectively provided on both ends of the upper part of the body 6. During installation, simply align the stationary blade holder 2 in the trimming head with the upper part of the body 6 and press it firmly to engage the spring-loaded blocks 61 into the hook grooves 23, thus fixing the trimming head to the body 6 to form a complete shaver. After shaving, pressing the side walls of both ends of the stationary blade holder 2 will cause the spring-loaded blocks 61 to retract and disengage from the hook grooves 23, thereby facilitating the separation of the trimming head from the body 6 and making it convenient for users to perform maintenance operations such as rinsing and cleaning the trimming head.

[0053] To achieve pendulum-like reciprocating rotation of the moving blade 3 in the trimmer head along the stationary blade 1, the drive mechanism 5 includes a motor 51, an eccentric wheel 52, and a swing frame 53. The motor 51 is fixed inside the machine body 6, and its output shaft is used to fix the eccentric wheel 52 so that the eccentric wheel 52 rotates synchronously with the output shaft. The eccentric shaft 54 ​​set on the eccentric wheel 52 is inserted into the swing groove 55 at the lower end of the swing frame 53. The upper end of the swing frame 53 is inserted into the drive groove 33 of the moving blade holder 32 to form a linkage connection. After the motor 51 is started, the eccentric shaft 54 ​​in the eccentric wheel 52 pushes the two side walls of the swing groove 55 in sequence, so that the swing frame 53 forms a reciprocating linear motion. The swing frame 53 moves synchronously along the inclined wall of the drive groove 33 in the moving blade holder 32, driving the moving blade 3 to reciprocate in a pendulum-like manner along the inner surface of the stationary blade 1 with the axis of the rotating shaft 4 as the reference.

[0054] When the eccentric shaft 54 ​​in the eccentric wheel 52 pushes against the side wall of the swing groove 55 at the bottom of the swing frame 53, it applies not only a lateral thrust to the swing groove 55, but also a radial (i.e., rotational) thrust to the side wall of the swing groove 55, causing the two ends of the swing frame 53 to twist. To prevent the swing frame 53 from transmitting the torsional force to the moving tool holder 32 and affecting the working stability of the moving tool holder 32, a connecting seat 56 independent of the swing frame 53 is provided at the upper end of the swing frame 53. The top of the connecting seat 56 is inserted into the drive groove 33 at the bottom of the moving tool holder 32 to form a transmission connection, and a top support spring 57 is provided between the bottom of the connecting seat 56 and the swing frame 53 to form a movable connection. By setting a separate connecting seat 56, and connecting the upper and lower ends of the connecting seat 56 to the drive groove 33 of the moving blade holder 32 and the swing frame 53 respectively, the swing frame 53 is prevented from forming a rigid connection directly with the moving blade holder 32. When the eccentric shaft 54 ​​pushes the side wall of the swing groove 55 to apply a radial torsional force to the swing frame 53, the transmission connection structure between the connecting seat 56 and the drive groove 33 of the moving blade holder 32, as well as the movable connection structure between the connecting seat 56 and the swing frame 53, can form a double elimination effect, preventing the torsional force from being directly transmitted to the moving blade holder 32, and avoiding the moving blade holder 32 from twisting and affecting the working stability of the moving blade 3 and the stationary blade 1 in the pruning process.

[0055] Secondly, a top support spring 57 is added between the connecting seat 56 and the swing frame 53. In the initial state, the top support spring 57 supports the connecting seat 56, while the connecting seat 56 supports the moving blade seat 32. Since the moving blade 31 is installed on the moving blade seat 32, the moving blade 31 can always maintain contact with the inner surface of the mesh 11 in the stationary blade 1 and form sufficient shearing force. In addition, with the cooperation of the two ends of the rotating shaft 4 and the upper end wall of the through hole 21, an upper limit can be formed on the upward pushing distance of the top support spring 57, so as to prevent the stationary blade 1 from being excessively pushed out of the stationary blade seat 2 by the moving blade 3.

[0056] Furthermore, when the stationary blade 1 is subjected to external force, the mesh 11 in the stationary blade 1 can press the moving blade 31 and the moving blade holder 32 downward along the axial direction of the stationary blade holder 2, preventing the moving blade 31 from breaking the mesh 11 and avoiding the blade of the moving blade 31 from breaking, thus ensuring the safety of the mesh 11 and the moving blade 31 in use. Moreover, the cooperation between the two ends of the rotating shaft 4 and the lower end wall of the through hole 21 can create a lower limit on the axial downward displacement distance of the mesh 11, the moving blade 31, and the moving blade holder 32, preventing excessive displacement of the mesh 11, the moving blade 31, and the moving blade holder 32 from affecting the working stability of the moving blade 3 and the stationary blade 1. When the external force disappears, under the elastic force of the top support spring 57, the connecting seat 56, the moving blade holder 32, the moving blade 31, and the rotating shaft 4 synchronously move upward and automatically reset, ensuring that the moving blade 31 always maintains contact with the inner surface of the stationary blade 1 to form a shearing force.

[0057] To achieve a movable connection between the connecting seat 56 and the swing frame 53, a drive shaft 531 and hooks 532 positioned opposite each other on both sides of the drive shaft 531 are provided on the swing frame 53. The bottom of the connecting seat 56 is provided with a shaft hole 561 and opposite hook rings 562. The top support spring 57 is sleeved on the outside of the drive shaft 531, and the top of the drive shaft 531 is inserted into the shaft hole 561, causing the two hooks 532 to engage with the hook rings 562, thus forming a movable connection between the connecting seat 56 and the swing frame 53. By setting the hook rings 562 and the hooks 532, during assembly, the hooks 532 and the hook rings 562 can cooperate with each other, ensuring the synchronicity of the left and right reciprocating swing of the connecting seat 56 and the swing frame 53. Furthermore, under the pressure of skin on the stationary knife 1, the moving knife 3, the moving knife seat 32, the rotating shaft 4, and the connecting seat 56 can synchronously move axially downward, ensuring the safety of the stationary knife 1 and the moving knife 3 in use. To enhance the rigidity of the connecting seat 56 driving the moving blade holder 32 and prevent the hook 532 from breaking, a drive shaft 531 is added between the two hooks 532. The drive shaft 531 is directly inserted into the coupling hole 561 in the connecting seat 56, which ensures the reciprocating oscillation rigidity of the connecting seat 56 and guarantees the beard trimming performance of the moving blade 3 and the stationary blade 1.

[0058] To facilitate the connecting seat 56 in driving the moving blade holder 32 to reciprocate and rotate along the inner surface of the mesh 11 in the stationary blade 1 with the axis of the rotating shaft 4 as a reference, a driving ball head 563 is provided at the top of the connecting seat 56. The driving ball head 563 is engaged in the driving groove 33 at the bottom of the moving blade holder 32, thus forming a transmission connection between the connecting seat 56 and the moving blade holder 32. By inserting the ball head 563 into the driving groove 33 at the bottom of the moving blade holder 32, and with the outer diameter of the ball head 563 matching the width of the driving groove 33, the outer spherical surface of the ball head 563 contacts the inclined wall of the driving groove 33. When the connecting seat 56 reciprocates linearly with the swing frame 53, the outer spherical surface of the ball head 563 can push against the inclined wall of the driving groove 33 at the bottom of the moving blade holder 32, thereby causing the moving blade holder 32 and the moving blade 31 to reciprocate and rotate along the inner surface of the mesh 11 in the stationary blade 1 with the axis of the rotating shaft 4 as a reference in a pendulum-like manner.

[0059] The above embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A pendulum-type reciprocating rotary trimmer head, comprising a stationary blade (1) and a stationary blade seat (2) for mounting the stationary blade (1), wherein a moving blade (3) is placed inside the stationary blade seat (2) and remains in contact with the inner surface of the stationary blade (1) under external force to form a cutting force; characterized in that A rotating shaft (4) is provided inside the stationary knife holder (2). The rotating shaft (4) passes through the moving knife (3) and its two ends are connected to the stationary knife holder (2) respectively, so that the moving knife (3), the stationary knife (1) and the stationary knife holder (2) are assembled and disassembled as a whole. The moving knife (3) is connected to the drive mechanism (5) for transmission. When viewed from the orthographic projection direction of either end of the stationary knife holder (2), the drive mechanism (5) drives the moving knife (3) to reciprocate in a straight line, with the axis of the rotating shaft (4) as the reference, and rotates in a pendulum-like manner along the inner surface of the stationary knife (1).

2. The pendulum-type reciprocating rotary trimmer head according to claim 1, characterized in that... With the axis of the rotating shaft (4) as the reference, the driving mechanism (5) drives the moving blade (3) to rotate along the rotating shaft (4) by a single-sided rotation angle a of less than 45° to form a pendulum-type reciprocating cutting fan-shaped surface S of less than 90°.

3. The pendulum-type reciprocating rotary trimmer head according to claim 1, characterized in that... A drive groove (33) is provided at the bottom of the moving cutter (3). The drive groove (33) is inclined with respect to the axis of the rotating shaft (4). The drive mechanism (5) is placed in the drive groove (33) and squeezes the inclined wall of the drive groove (33) when the drive mechanism (5) swings back and forth, so that the moving cutter (3) forms a pendulum-like reciprocating rotation along the inner surface of the stationary cutter (1) with respect to the axis of the rotating shaft (4).

4. The pendulum-type reciprocating rotary trimmer head according to claim 3, characterized in that... The drive groove (33) at the bottom of the moving cutter (3) is based on the axis of the rotating shaft (4), and its tilt angle b is greater than 5° and less than or equal to 85°.

5. The pendulum-type reciprocating rotary trimmer head according to claim 3, characterized in that... The reciprocating swing stroke of the drive mechanism (5) is less than the length of the drive groove (33).

6. The pendulum-type reciprocating rotary trimmer head according to claim 3, characterized in that... The moving knife (3) includes a moving blade (31) and a moving knife holder (32). The moving blade (31) is fixed on the moving knife holder (32), and the rotating shaft (4) passes through the moving knife holder (32) and its two ends are connected to the stationary knife holder (2) respectively, so that the stationary knife (1), the stationary knife holder (2), the moving blade (31) and the moving knife holder (32) are combined into a whole that can be disassembled and assembled. The drive groove (33) is set at the bottom of the moving knife holder (32).

7. The pendulum-type reciprocating rotary trimmer head according to claim 1, characterized in that... A limiting structure (41) is provided on the rotating shaft (4) to form a horizontal limit for the moving blade (3).

8. The pendulum-type reciprocating rotary trimmer head according to claim 1, characterized in that... Through holes (21) are provided on the side walls at both ends of the stationary tool holder (2). The width of the through hole (21) matches the outer diameter of the rotating shaft (4), and the length is greater than the outer diameter of the rotating shaft (4), so that when an external force is applied to the stationary tool (1), the moving tool (3) can move up and down along the axis of the stationary tool holder (2) with the rotating shaft (4).

9. The pendulum-type reciprocating rotary trimmer head according to claim 1, characterized in that... The stationary knife (1) includes a mesh (11) and a connecting piece (12). The two ends of the mesh (11) are connected to the connecting piece (12) as a whole. The connecting piece (12) is provided with at least one axial sliding hole (13). The axial sliding hole (13) is sleeved on the hook (22) provided on the inner walls of both sides of the stationary knife seat (2), so that the stationary knife (1) and the stationary knife seat (2) are detachably connected. When an external force is applied to the stationary knife (1), the connecting piece (12) can drive the mesh (11) to move axially up and down relative to the stationary knife seat (2).

10. A razor, comprising a body (6), characterized in that... The pendulum-type reciprocating rotary trimmer head according to any one of claims 1 to 9 is detachably connected to the body (6) as a whole, and the drive mechanism (5) is fixed inside the body (6).

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