Rotary shaving knife, trimming knife head and trimming tool

Abstract

The utility model relates to a rotary shaving cutter, a trimming cutter head and a trimming tool, which are characterized in that at least one movable cutter tooth is provided with a front angle and a rear angle, and the vertical distance T between the front angle and the rear angle is smaller than the length of a hair guide groove in a static cutter, so that the outer rotating track of the front angle and the inner rotating track of the rear angle are both positioned in the hair guide groove of the static cutter; and when the front angle is close to any hair guide groove in any static cutter, the movable cutting edge and the static cutting edge are inclined to form a first included angle S1. The utility model has the beneficial effects that the positions of the front angle and the rear angle of the movable cutter tooth are mutually adjusted, when the front angle of the movable cutter tooth is in contact with the static blade of the static cutter tooth, the front angle of the movable cutter tooth and the static blade form a closed state, and at the moment, even if part of to-be-sheared beards and other hairs are extruded by the static blade and the static blade, the hairs can be sheared off. When the trimming tool moves, the trimming tool can slide out of the trimming area of the movable blade and the static blade from the rear corner below and the opening of the static blade, so that the galling phenomenon at the moment of moving of the trimming tool can be prevented, and the use comfort of the trimming tool is improved.

Description

Technical Field

[0001] This utility model relates to a hair trimming device, and more specifically to a rotary razor, trimming head, and trimming tool, which is mainly used in the field of personal care tools such as razors and hair clippers. Background Technology

[0002] Existing rotary trimmer heads are as per the instruction manual. Figure 1 As shown, the device includes a circular stationary blade (1) and a moving blade (2). The stationary blade (1) has several stationary blade teeth (11) arranged at intervals in a circular array, and a hair guide groove (12) is formed between adjacent stationary blade teeth (11). The moving blade (2) has multiple moving blade teeth (21) arranged in a circular array, and each moving blade tooth (21) has a front angle (211) and a rear angle (212). To facilitate the trimming of hair such as beards, the moving blade edge (211) in the existing moving blade tooth (21) is inclined outward relative to the stationary blade edge (111) in the stationary blade tooth (11), so that the front angle (212) of the moving blade tooth (21) is below the moving blade tooth (21), and the rear angle (213) is above the moving blade tooth (21). The front angle (212) and the rear angle (213) are connected to form an inclined moving blade edge (211).

[0003] When trimming beards and other hair, the front corner (212) of the moving blade (21) approaches the stationary blade (11) before the rear corner (213), creating an opening between the rear corner (213) and the stationary blade (11). This allows the beard and other hair (23) to be trimmed to easily enter the space between the moving blade (21) and the stationary blade (11). Figure 1 As shown in the enlarged image.

[0004] Because users frequently move the trimmer along the skin surface when shaving with a handheld trimmer, the stationary blade (11) remains stationary. When the front corner (212) of the moving blade (21) approaches the stationary blade (11), it drives the hair (23) to be trimmed towards the stationary blade (1). Some of the hair (23) cannot move at the moment the moving blade (211) and the stationary blade (11) are squeezed together, especially because the front corner (212) restricts its downward movement. At this moment, if the user is holding the trimmer upward, the hair (23) squeezed by the moving blade (21) and the stationary blade (11) near the front corner (212) will pull the hair, causing the user's skin to feel a pulling pain. Figure 2a and Figure 2b The simulation diagram shows that the comfort of using the trimming tool has been reduced. Utility Model Content

[0005] To solve the above technical problems, this utility model provides a rotary razor and trimming head and trimming tool. By changing the shape of the moving blade of each moving tooth, the front angle of the moving blade forms a closed opening with the stationary blade when it approaches the stationary blade. This prevents hair such as beards from entering the trimming area of ​​the moving and stationary blades during the trimming process. In this way, when the user holds the trimming tool and moves it upward (or forward) along the skin, no hair pulling will occur regardless of the moving speed, thus improving the comfort of using the trimming tool.

[0006] To solve the above technical problems, the present invention adopts a rotary razor, including a blade body with multiple rotating cutting teeth. At least one moving tooth has a front angle and a rear angle. When the moving tooth rotates along the stationary blade, the front angle forms an outer rotation trajectory, and the rear angle forms an inner rotation trajectory. The diameter of the outer rotation trajectory of the front angle is larger than that of the inner rotation trajectory of the rear angle. Furthermore, the vertical distance T between the front angle and the rear angle is less than the length of the guide groove in the stationary blade, so that both the outer rotation trajectory of the front angle and the inner rotation trajectory of the rear angle are within the guide groove of the stationary blade. The front angle and the rear angle are connected to form an inclined moving blade. When the front angle approaches any guide groove in the stationary blade, the moving blade and the stationary blade of the stationary tooth between the adjacent guide grooves in the stationary blade form a first included angle S1.

[0007] Preferably, when each moving cutting tooth contacts the stationary cutting tooth at its rake angle, the first included angle S1 between the moving cutting edge and the stationary cutting edge is: 5°≤ S1 ≤30°.

[0008] Preferably, with the vertical extension of the front angle as a reference, a second included angle S2 of less than 90° is formed between the moving blade and the vertical extension.

[0009] Preferably, when viewed from the axial orthographic projection of the blade body, when the vertical extension of the rake angle of any moving tooth coincides with the vertical center line of the blade body, the second included angle S2 between the moving cutting edge of the moving tooth and the vertical center line of the blade body is between 5° and 15°, and the moving cutting edges of adjacent moving teeth form the same third included angle S3, which are arranged in a ring-shaped interval.

[0010] Based on the aforementioned razor, the applicant also proposes a trimming head technical solution, including the aforementioned rotary razor and a stationary blade that works in conjunction with it. The stationary blade is circular, and several stationary blade teeth are arranged radially at intervals from the center, so that at least two radially spaced trimming rings are formed on the surface of the stationary blade, and guide grooves are formed between adjacent stationary blade teeth in each trimming ring.

[0011] Preferably, the razor includes an outer cutting blade and an inner cutting blade, which have different diameters and are coaxially mounted on a moving blade holder, and have different numbers of moving blade teeth. The trimming ring includes an outer trimming ring and an inner trimming ring, wherein the outer cutting blade rotates along the outer trimming ring, and when the multiple moving blade teeth in the outer cutting blade rotate and approach the stationary blade edge of any stationary blade tooth in the outer trimming ring, a first included angle S1a is formed between the moving blade edge in the outer cutting blade and the stationary blade edge of the corresponding stationary blade tooth; the inner cutting blade rotates along the inner trimming ring under the drive of an external force, and when the multiple moving blade teeth in the inner cutting blade rotate and approach the stationary blade edge of any stationary blade tooth in the inner trimming ring, a first included angle S1b is formed between the moving blade edge in the inner cutting blade and the stationary blade edge of the corresponding stationary blade tooth, wherein the first included angle S1a and the first included angle S1b are the same or different angles.

[0012] Preferably, the first included angle S1a and the first included angle S1b are at different angles, and the first included angle S1a is smaller than the first included angle S1b, wherein the first included angle S1b is 10° to 30°.

[0013] Preferably, viewed from the orthographic projection direction of the central axis of the inner cutter, the front and rear angles of each moving tooth in the inner cutter are connected to form an inclined moving blade, and the vertical distance T between the front and rear angles is less than the length of the hair guide groove in the inner trimming ring.

[0014] Preferably, taking the vertical extension line of the rake angle of the inner cutter as a reference, the fourth included angle S4 between the moving cutting edge of each moving tooth in the inner cutter and the vertical extension line is 10° to 30°, and the fifth included angle S5 between adjacent moving cutting edges is greater than the fourth included angle S4.

[0015] Based on the aforementioned hair trimming scissor head, this application also proposes a trimming tool, including the aforementioned hair trimming scissor head.

[0016] The beneficial effect of this invention is that by adjusting the positions of the front and rear angles of the moving blade teeth, and making the diameter of the outer rotation trajectory of the front angle of the moving blade teeth larger than the inner rotation trajectory of the rear angle, when the front angle of the moving blade teeth contacts the stationary blade of the stationary blade teeth, a closed state is formed between the front angle of the moving blade teeth and the stationary blade, preventing the hair to be trimmed, such as beard hair, from entering the trimming area where the moving and stationary blades cooperate. Meanwhile, an open state is formed between the rear angle of the moving blade teeth and the stationary blade. At this time, even if some of the hair to be trimmed is squeezed by the moving and stationary blades, and the user happens to move the handheld tool along the skin surface, the squeezed hair can slide out of the trimming area between the moving and stationary blades from the opening between the rear angle and the stationary blade, thus preventing hair pulling during tool movement and improving the comfort of using the trimming tool. Attached Figure Description

[0017] Figure 1 Assembly structure diagram of existing hair trimmer heads

[0018] Figure 2a The first simulation diagram for trimming beard and other hair using existing moving and stationary blades.

[0019] Figure 2b A second simulation diagram for trimming beard and other hair using existing moving and stationary blades.

[0020] Figure 3 This is a front view structural diagram of the first embodiment of the rotary shaver of this utility model.

[0021] Figure 4 This is a perspective structural diagram of the first embodiment of the rotary shaver of this utility model.

[0022] Figure 5 This is an assembly structure diagram of the first embodiment of the rotary shaver of this utility model.

[0023] Figure 6 This is a front view structural diagram of the second embodiment of the rotary shaver of this utility model.

[0024] Figure 7 This is a perspective structural diagram of the second embodiment of the rotary shaver of this utility model.

[0025] Figure 8 This is an assembly structure diagram of the second embodiment of the rotary shaver of this utility model.

[0026] Figure 9 This is an exploded perspective view of the trimmer head according to an embodiment of the present invention. Detailed Implementation

[0027] The following is in conjunction with the appendix Figures 3-9 The embodiments of this utility model are further described below:

[0028] This utility model discloses a rotary razor, including a blade body 3, on which multiple rotating cutting teeth 4 are provided, arranged in a circular array and spaced apart. To address the shortcomings of existing razors where the moving blade 41 of the moving teeth 4 forms an opening with the stationary blade 511 during hair trimming, allowing hair to enter the trimming area of ​​the moving blade 41 and stationary blade 511, causing pulling and pain when the user slides the razor along the skin, thus reducing the comfort of using the razor. To address the aforementioned technical deficiencies, this embodiment provides the following technical solution: at least one moving cutter tooth 4 has a front angle 42 and a rear angle 43. When the moving cutter tooth 4 rotates along the stationary cutter 5, the front angle 42 forms an outer rotation trajectory 421, and the rear angle 43 forms an inner rotation trajectory 431. The diameter of the outer rotation trajectory 421 of the front angle 42 is larger than the diameter of the inner rotation trajectory 431 of the rear angle 43. Furthermore, the vertical distance T between the front angle 42 and the rear angle 43 is less than the length of the guide groove 52 in the stationary cutter 5, ensuring that both the outer rotation trajectory 421 of the front angle 42 and the inner rotation trajectory 431 of the rear angle 43 are... The moving blade 4 is located in the guide groove 52 of the stationary blade 5. By adjusting the positions of the front angle 42 and rear angle 43 of the moving blade 4, and making the diameter of the outer rotation trajectory 421 of the front angle 42 of the moving blade 4 larger than the inner rotation trajectory 431 of the rear angle 43, when the front angle 42 of the moving blade 4 contacts the stationary blade 511 of the stationary blade 51, a closed state is formed between the front angle 42 of the moving blade 4 and the stationary blade 511, so that the hair such as beard to be cut cannot enter the trimming area of ​​the moving blade 41 and the stationary blade 511, while the rear angle 43 of the moving blade 4 forms an open state with the stationary blade 511. At this time, even if some of the hairs such as beard to be trimmed are squeezed by the passive blade 41 and the stationary blade 511, and the user happens to move the hand tool along the skin surface, the squeezed hairs such as beard to be trimmed can slide out of the trimming area of ​​the passive blade 41 and the stationary blade 511 from the lower rear corner 43 and the opening of the stationary blade 511. This can prevent the hair from being pulled at the moment the trimming tool moves, and improve the comfort of using the trimming tool.

[0029] In addition, the vertical distance T between the front angle 42 and the rear angle 43 of the moving blade 4 is set to be less than the length of the guide groove 52. This reduces the contact area between the moving blade 4 and the stationary blade 5 while ensuring the hair trimming performance of each moving blade 4. The reduced contact area also reduces the frictional resistance between the moving blade 4 and the stationary blade 5 as they rotate along the stationary blade 5, thus preventing heat buildup due to friction and reducing the frictional temperature rise between them. This prevents the user's skin from feeling hot due to excessive temperature rise, improving the comfort of using the trimming tool. Secondly, the vertical distance T between the front angle 42 and the rear angle 43 of the moving blade 4 is set to be less than the guide groove 52. This ensures that when the hair to be trimmed, such as beard hair, enters the guide groove 52, the hair not yet cut by the blade 41 has sufficient sliding space, preventing hair pulling or jamming due to insufficient space, and ensuring the comfort of using the shaver.

[0030] To improve the cutting sharpness between the moving blade 41 and the stationary blade 511, the front angle 42 and the rear angle 43 are connected to form an inclined moving blade 41. When the front angle 42 approaches any guide groove 52 in any stationary blade 5, the moving blade 41 and the stationary blade 511 of the stationary blade teeth 51 between adjacent guide grooves 52 in the stationary blade 5 form an inclined first angle S1. By setting the moving blade 41 to an inclined shape and forming an inclined first angle S1 between the moving blade 41 and the stationary blade 511, the cutting angle between the moving blade 41 and the stationary blade 511 is adjusted accordingly when the moving blade rotates along the stationary blade 5, resulting in a higher cutting sharpness between the moving blade 41 and the stationary blade 511 and better trimming performance of the shaving razor.

[0031] To improve the hair trimming performance and cutting efficiency between the moving blade 41 and the stationary blade 511, when each moving blade 4 contacts the stationary blade 51 at its front angle 42, the first included angle S1 between the moving blade 41 and the stationary blade 511 is: 5°≤ S1≤30°, preferably less than 15°. This ensures the cutting sharpness while also taking into account the working strength of the moving blade 41 and the stationary blade 511.

[0032] To facilitate the production of the stationary blade 5 and ensure its hair-feeding efficiency, the existing stationary blade 5 has its stationary blade teeth 51 arranged radially from the center. Due to the fixed shape and angle of the stationary blade teeth 51, adjusting the cutting angle between the moving blade 41 and the stationary blade 511 requires changing the angle of the moving blade 41. Therefore, using the vertical extension of the front angle 42 as a reference, a second included angle S2 of less than 90° is formed between the moving blade 41 and its vertical extension. This is equivalent to tilting the moving blade 41 downwards to the left (i.e., away from the direction of rotation). By controlling the tilt angle of the second included angle S2, the first included angle S1 between the moving blade 41 and the stationary blade 511 can be adjusted. Using this structure, the moving blade 41 can maintain the cutting sharpness between the moving blade 41 and the stationary blade 511 while balancing the production and hair-feeding efficiency of the stationary blade 5, thereby improving the hair-trimming performance of both the moving blade 41 and the stationary blade 511.

[0033] In actual production, to facilitate the measurement of the second included angle S2, when the vertical extension of the rake angle 42 overlaps with the central axis of the moving blade, the included angle between the moving blade 41 and the central axis is the second included angle S2, preferably 5° to 15°. Figure 3 As shown. By adjusting the angle S2 between the second included angle between the moving blade 41 and the vertical extension line of the front angle 42, the limitation of the fixed angle of the stationary blade 51 being difficult to adjust can be avoided. Thus, the cutting angle between the moving blade 41 and the stationary blade 511 can be adjusted according to the needs of the user, ensuring the cutting sharpness between the moving blade 41 and the stationary blade 511 and improving the hair trimming performance of the trimming tool.

[0034] To facilitate the forming of each moving tooth 4 in the moving cutter, a third included angle S3 is formed between the moving cutting edges 41 of adjacent moving teeth 4, so that the moving teeth 4 are arranged in a ring-shaped interval array. The angle of the third included angle S3 is preferably an integer divisor of the circumference, and the specific value is determined according to the number of moving teeth 4. If there are 12 moving teeth 4, the angle of the third included angle S3 is 30°, and if there are 9 moving teeth 4, the corresponding angle of the third included angle S3 is 40°. Therefore, the specific value of the third included angle S3 depends on the specific number of moving teeth 4, and this embodiment does not impose further limitations.

[0035] Based on the aforementioned razor, this embodiment also proposes a trimming head technical solution, including the aforementioned rotary razor and a cooperating stationary blade 5. The stationary blade 5 is circular, with several stationary blade teeth 51 arranged radially at intervals, forming at least two radially spaced trimming rings 53 on the surface of the stationary blade 5. Within each trimming ring 53, a hair-guiding groove 52 is formed between adjacent stationary blade teeth 51. By setting two radially spaced trimming rings 53 on the surface of the stationary blade 5, the length of the hair-guiding groove 52 between adjacent stationary blade teeth 51 can be relatively shortened, preventing the stationary blade teeth 51 from bending and deforming when in contact with the skin, thus increasing the frictional resistance between the moving blade and the stationary blade 5 and affecting the hair trimming performance of the interaction between the stationary blade teeth 51 and the moving blade teeth 4. Furthermore, it can effectively improve the overall surface strength of the stationary blade 5, ensuring the hair-feeding efficiency of the stationary blade 5.

[0036] Because two radially spaced trimming rings 53 are set in the stationary blade 5, the guide grooves 52 in both trimming rings 53 can individually guide the hair to be trimmed, such as beard hair. To ensure the hair trimming efficiency of each trimming ring 53, the razor includes an outer cutter 3a and an inner cutter 3b. The outer cutter 3a and the inner cutter 3b have different diameters and are coaxially mounted on the moving blade holder 6. The outer cutter 3a and the inner cutter 3b have different numbers of moving blade teeth 4. The trimming ring 53 includes an outer trimming ring 531 and an inner trimming ring 532. The outer cutter 3a rotates along the outer trimming ring 531, and the multiple moving blade teeth 4 in the outer cutter 3a... When the rotating blade approaches the stationary blade 511 of any stationary tooth 51 in the outer trimming ring 531, a first included angle S1a is formed between the moving blade 41 in the outer cutter 3a and the stationary blade 511 of the corresponding stationary tooth 51; the inner cutter 3b rotates along the inner trimming ring 532 under the drive of external force, and when the multiple moving blades 4 in the inner cutter 3b rotate to approach the stationary blade 511 of any stationary tooth 51 in the inner trimming ring 532, a first included angle S1b is formed between the moving blade 41 in the inner cutter 3b and the stationary blade 511 of the corresponding stationary tooth 51, wherein the first included angle S1a and the first included angle S1b are the same or different angles. An outer trimming ring 531 and an inner trimming ring 532 are formed in the stationary blade 5. To complement the hair trimming efficiency of the outer trimming ring 531 and the inner trimming ring 532, the shaving blade is provided with two corresponding rings, which rotate along the outer trimming ring 531 and the inner trimming ring 532 respectively. This not only shortens the length of the guide groove 52 between adjacent stationary blade teeth 51 in the stationary blade 5, improving the working strength of the stationary blade 5, but also shortens the length of the moving blade teeth 4 accordingly. The moving blade teeth 4 in the two independent outer cutting blades 3a and inner cutting blades 3b cooperate with the outer trimming ring 531 and the inner trimming ring 532, avoiding the twisting and deformation caused by the excessive length of the moving blade teeth 4 in the outer cutting blades 3a and inner cutting blades 3b, thus ensuring the hair trimming performance of the shaving head.

[0037] Since the outer cutter 3a and the inner cutter 3b have different diameters and are coaxially mounted on the moving cutter holder 6, in actual production, the number of moving cutter teeth 4 in the outer cutter 3a and the inner cutter 3b can be the same or different. If the number of moving cutter teeth 4 in the outer cutter 3a and the inner cutter 3b is the same, it means that the interval between each moving cutter tooth 4 in the inner cutter 3b is smaller than the interval between the moving cutter teeth 4 in the outer cutter 3a, which may affect the hair feeding efficiency of each hair guide groove 52 in the inner trimming ring 532. Therefore, in this embodiment, the number of moving cutter teeth 4 in the outer cutter 3a and the inner cutter 3b is different, that is, the number of moving cutter teeth 4 in the inner cutter 3b is less than the number of moving cutter teeth 4 in the outer cutter 3a.

[0038] When the number of moving teeth 4 is different, the first included angle S1a formed between the moving blade 41 and the stationary blade 511 of the moving teeth 4 in the outer cutter 3a and the first included angle S1b formed between the moving blade 41 and the stationary blade 511 of each moving tooth 4 in the inner cutter 3b can be set to the same value, or they can be set to different values. If they are set to the same angle, the moving teeth 4 in the outer cutter 3a and the inner cutter 3b need to be staggered during assembly to avoid mutual interference when trimming beards and other hair. Of course, the first included angle S1a and the first included angle S1b can also be set to be different angles. For example, the first included angle S1a is smaller than the first included angle S1b. The first included angle S1b is 10° to 30°, preferably 15°, while the first included angle S1a is preferably 5°. With such different angle settings, when the moving blades 4 in the outer cutter 3a and the inner cutter 3b cut the beard and other hair at the same time, the falling direction of the broken beard or hair will also be different, thereby avoiding mutual interference between the outer cutter 3a and the inner cutter 3b and ensuring the hair trimming efficiency of the trimmer head.

[0039] To reduce the frictional resistance between the inner cutting blade 3b and the stationary blade 5, viewed from the orthographic projection direction of the central axis of the inner cutting blade 3b, the front angle 42 and rear angle 43 of each moving blade tooth 4 in the inner cutting blade 3b are connected to form an inclined moving blade 41, and the vertical distance T between the front angle 42 and the rear angle 43 is less than the length of each hair guide groove 52 in the inner trimming ring 532. In this way, while ensuring the hair trimming performance of each moving blade tooth 4, the contact area between each moving blade tooth 4 in the inner cutting blade 3b and the inner trimming ring 532 of the stationary blade 5 is reduced. As the contact area is reduced, the frictional resistance between each moving blade tooth 4 in the inner cutting blade 3b and the stationary blade 5 will also decrease simultaneously when each moving blade tooth 4 in the inner cutting blade 3b rotates along the inner trimming ring 532. This avoids the heat rise caused by friction between the moving blade tooth 4 and the stationary blade 5, reduces the frictional temperature rise between the moving blade tooth 4 and the stationary blade 5, prevents the user's skin from burning due to excessive temperature rise, and improves the comfort of using the trimming tool. Secondly, the vertical distance T between the front angle 42 and the rear angle 43 of the moving blade tooth 4 is set to be less than the hair guide groove 52. This way, when the hair to be cut, such as beard, enters the hair guide groove 52, the hair that has not been cut by the passive blade 41 has enough sliding space to avoid hair pulling or getting stuck due to insufficient space, thus ensuring the comfort of using the razor.

[0040] To facilitate the production of the stationary blade 5 and ensure its cutting efficiency, the stationary blade teeth 51 in the existing stationary blade 5 are basically radially oriented from the center. Due to the fixed shape and angle of the stationary blade teeth 51, the only way to adjust the cutting angle between the moving blade 41 and the stationary blade 511 is to change the angle of the moving blade 41. Therefore, taking the vertical extension line of the front angle 42 of the inner cutting blade 3b as a reference, the fourth included angle S4 between the moving blade 41 of each moving blade 4 in the inner cutting blade 3b and the vertical extension line is 10° to 30°, preferably 15°. This is equivalent to tilting the moving blade 41 of each moving blade 4 in the inner cutting blade 3b downward to the left (i.e., away from the direction of rotation). By controlling the tilt angle of the fourth included angle S4, the first included angle S1b between the moving blade 41 of each moving blade 4 in the inner cutting blade 3b and the stationary blade 511 can be adjusted. By employing this structure, the moving blade 41 can ensure the cutting sharpness between the moving blade 41 and the stationary blade 511 while balancing the production and hair-feeding efficiency of the stationary blade 5, thereby improving the hair-trimming performance of the moving blade 41 and the stationary blade 511. Secondly, by adjusting the angle S4 between the fourth included angle S4 between the moving blade 41 of each moving tooth 4 in the inner cutter 3b and the vertical extension line of the front angle 42, the limitation of the stationary blade 51's fixed angle can be avoided. This allows the cutting angle between the moving blade 41 and the stationary blade 511 of each moving tooth 4 in the inner cutter 3b to be adjusted according to needs or user requirements, ensuring the cutting sharpness between the moving blade 41 and the stationary blade 511 of each moving tooth 4 in the inner cutter 3b and improving the hair-trimming performance of the trimming tool.

[0041] Based on the above embodiments, this application also proposes a trimming tool, including the trimming scissor head described above.

[0042] The accompanying drawings in this application show a double-acting trimming tool. If a single-acting blade is used, the inner cutting blade 3b can be omitted.

[0043] The above embodiments should not be regarded 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 rotary razor, comprising a blade body (3), wherein a plurality of rotating cutting teeth (4) are provided on the blade body (3); characterized in that At least one moving cutter tooth (4) has a rake angle (42) and a clearance angle (43). When the moving cutter tooth (4) rotates along the stationary cutter (5), the rake angle (42) forms an outer rotation trajectory (421), and the clearance angle (43) forms an inner rotation trajectory (431). The diameter of the outer rotation trajectory (421) of the rake angle (42) is larger than that of the inner rotation trajectory (431) of the clearance angle (43). Furthermore, the vertical distance T between the rake angle (42) and the clearance angle (43) is less than the length of the guide groove (52) in the stationary cutter (5). The outer rotation trajectory (421) of the front angle (42) and the inner rotation trajectory (431) of the rear angle (43) are both located in the guide groove (52) of the stationary knife (5); the front angle (42) and the rear angle (43) are connected to form an inclined moving blade (41), and when the front angle (42) approaches any guide groove (52) in any stationary knife (5), the moving blade (41) and the stationary blade (511) of the stationary knife teeth (51) between the adjacent guide groove (52) in the stationary knife (5) form an inclined first included angle S1.

2. The rotary shaver according to claim 1, characterized in that... When each moving cutter tooth (4) contacts the stationary cutter tooth (51) at its rake angle (42), the first included angle S1 between the moving cutter edge (41) and the stationary cutter edge (511) is: 5°≤ S1 ≤30°.

3. The rotary shaver according to claim 1, characterized in that... Based on the vertical extension of the front angle (42), a second included angle S2 of less than 90° is formed between the moving blade (41) and the vertical extension.

4. The rotary shaver according to claim 3, characterized in that... From the axial orthographic projection of the blade body (3), when the vertical extension of the rake angle (42) of any moving tooth (4) coincides with the vertical center line of the blade body (3), the second included angle S2 between the moving cutting edge (41) in the moving tooth (4) and the vertical center line of the blade body (3) is between 5° and 15°, and the moving cutting edges (41) of adjacent moving teeth (4) form the same third included angle S3 and are arranged in a ring-shaped interval.

5. A trimmer blade, characterized in that... The rotary razor included in any one of claims 1 to 4 and the stationary blade (5) therewith, wherein the stationary blade (5) is circular and a plurality of stationary blade teeth (51) are arranged radially at intervals from the center, so that at least two radially spaced trimming rings (53) are formed on the surface of the stationary blade (5), and hair guide grooves (52) are formed between adjacent stationary blade teeth (51) in each trimming ring (53).

6. The trimmer head according to claim 5, characterized in that... The razor includes an outer cutting blade (3a) and an inner cutting blade (3b), which are of different diameters and coaxially mounted on a moving blade holder (6). Different numbers of moving blade teeth (4) are formed on the outer cutting blade (3a) and the inner cutting blade (3b). The trimming ring (53) includes an outer trimming ring (531) and an inner trimming ring (532). The outer cutting blade (3a) rotates along the outer trimming ring (531), and when multiple moving blade teeth (4) in the outer cutting blade (3a) rotate and approach the stationary blade edge (511) of any stationary blade tooth (51) in the outer trimming ring (531), the outer cutting blade (3a)... The moving blade (41) in a) forms a first included angle S1a with the stationary blade (511) in the corresponding stationary blade tooth (51); the inner cutter (3b) rotates along the inner trimming ring (532) under the drive of external force, and when the multiple moving blade teeth (4) in the inner cutter (3b) rotate and approach the stationary blade (511) of any stationary blade tooth (51) in the inner trimming ring (532), the moving blade (41) in the inner cutter (3b) forms a first included angle S1b with the stationary blade (511) in the corresponding stationary blade tooth (51), wherein the first included angle S1a and the first included angle S1b are the same or different angles.

7. The trimmer head according to claim 6, characterized in that... The first included angle S1a and the first included angle S1b are at different angles, and the first included angle S1a is smaller than the first included angle S1b, wherein the first included angle S1b is 10° to 30°.

8. The trimmer head according to claim 6, characterized in that... Looking from the orthographic projection direction of the central axis of the inner cutter (3b), the front angle (42) and rear angle (43) of each moving tooth (4) in the inner cutter (3b) are connected to form an inclined moving blade (41), and the vertical distance T between the front angle (42) and the rear angle (43) is less than the length of the hair guide groove (52) in the inner trimming ring (532).

9. The trimmer head according to claim 6, characterized in that... Based on the vertical extension line of the front angle (42) of the inner cutter (3b), the fourth included angle S4 between the moving cutting edge (41) of each moving cutting tooth (4) in the inner cutter (3b) and the vertical extension line is 10° to 30°, and the fifth included angle S5 between adjacent moving cutting edges (41) is greater than the fourth included angle S4.

10. A pruning tool, characterized in that... Includes the trimmer head as described in any one of claims 5 to 9.

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