Enclosed hair trimming cutter head and shaving tool

Abstract

The utility model relates to an enclosed hair trimming cutter head and a shaving tool, which are characterized in that each movable cutter tooth in a movable cutter is provided with a front angle and a rear angle, the motion trail of the front angle of each movable cutter tooth penetrates through a hair guide groove, and the motion trail of the rear angle of each movable cutter tooth is positioned outside the closed end of the hair guide groove; when the movable cutter teeth approach to any static cutter tooth, a first included angle S1 is formed between the movable cutting edge and the static cutting edge on the corresponding static cutter tooth, when the front angle of the movable cutter teeth makes contact with the static cutting edge, an enclosed space with the periphery closed temporarily is defined in the hair guide groove, and when the rear angle crosses the static cutting edge, all hair in the enclosed space is cut off. The utility model has the beneficial effects that when the movable cutter is driven by external force to move along the static cutter to enable the movable cutter teeth to approach any static cutter tooth in the static cutter, a first included angle S1 is formed between the movable cutting edge and the static cutting edge, and when the front angle is in contact with the static cutting edge, an enclosed space with a closed periphery can be enclosed in the hair guide groove under the matching of the movable cutting edge and the static cutting edge; the hair is limited in the enclosed space, so that the hair is effectively prevented from escaping from the hair guide groove.

Description

Technical Field

[0001] This utility model relates to a hair trimming device, and more specifically to a closed-type hair trimming scissor head and shaving tool that gathers hair together for trimming, 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, it includes a circular stationary blade (1), on which are provided several spaced-apart hair inlet holes (11) arranged in a ring. A moving blade (2) has several moving teeth (21) mounted on a moving blade holder (3), with each moving tooth (21) fitting against the inner surface of the stationary blade (1). During use, the stationary blade (1) fits against the skin, allowing hair from the skin surface to enter the hair inlet holes (11) of the stationary blade (1). Driven by the moving blade holder (3) (which is connected to the motor output shaft), Figure 1 (Not shown in the image) Each moving blade (21) in the moving blade (2) rotates along the inner surface of the stationary blade (1). After the moving blade (211) on each moving blade (21) contacts the hair that extends into the hair inlet hole (11), it will push the hair toward the stationary blade (111) in the hair inlet hole (11) and cut the hair, thus achieving hair trimming.

[0003] As per the instruction manual Figure 1 As shown in the enlarged view, the moving blades (211) in the existing moving blade teeth (21) all have a front angle (212) and a rear angle (213). The front angle (212) is the part of the moving blade (211) that first contacts the stationary blade (111), and the rear angle (213) is the part of the moving blade (211) that later contacts the stationary blade (111). Looking at the base plane projection of the moving blade (2), the front corner (212) and the rear corner (213) are connected by an inclined line, and the inclined line and the stationary blade (111) form a trumpet-shaped angle with the opening facing outward. In this way, when the moving blade (211) contacts the hair entering the hair inlet (11), the hair will be divided into three parts. The first part is beyond the rotation trajectory of the moving blade (211) and is at the bottom of the hair inlet (11), and will not be trimmed. The second part will be cut off by the cooperation of the moving blade (211) and the stationary blade (111). The third part of the hair will escape outward along the inclined line of the moving blade (211) under the push of the moving blade (211), which relatively reduces the hair trimming efficiency of the rotary trimmer head. Utility Model Content

[0004] To solve the above technical problems, this utility model provides an enclosed hair trimming scissor head and shaving tool. By improving the moving blade, it can form an enclosed trimming area when it is combined with the stationary blade, reducing hair escape during trimming, increasing the amount of hair trimmed by the moving blade in a single pass, and improving the hair trimming efficiency of the trimming scissor head.

[0005] To solve the above technical problems, the present invention adopts a closed-type hair trimmer head, including a stationary blade and at least one movable blade that moves relative to the stationary blade. The stationary blade has several spaced-apart stationary blade teeth, and the movable blade has multiple movable blade teeth that cooperate with the stationary blade teeth to cut hair. The key feature is that a hair-guiding groove is formed between adjacent stationary blade teeth in the stationary blade, each groove having at least one closed end. Each movable blade has a front angle and a rear angle, which are connected to form a movable cutting edge. The movement trajectory of the front angle of each movable blade passes through the hair-guiding groove, and the movement trajectory of the rear angle is outside the closed end of the groove. Each stationary blade has at least one stationary cutting edge that cooperates with the movable cutting edge to generate shearing force. When a movable blade approaches any stationary blade under external force, a first included angle S1 is formed between the movable cutting edge and the corresponding stationary blade. When the front angle of the movable blade contacts the stationary cutting edge, at least one temporary closed enclosed space is formed within the hair-guiding groove. When the rear angle moves past the stationary cutting edge, the hair within the enclosed space can be cut.

[0006] Preferably, the stationary blade is circular, and a trimming ring is formed by a ring array of several stationary blade teeth and the guide grooves between adjacent stationary blade teeth. The trimming ring is coaxially arranged with the stationary blade, and each guide groove in the trimming ring has at least one closed end. The moving blade is mounted on the moving blade holder and rotates along the trimming ring as the moving blade holder rotates. The moving blade has a ring array of multiple moving blade teeth, and when any moving blade tooth rotates close to any stationary blade tooth in the trimming ring, a first included angle S1 is formed between the moving blade edge on each moving blade tooth and the stationary blade edge on the corresponding stationary blade tooth.

[0007] Preferably, when an external force drives the moving cutter tooth to approach any stationary cutter tooth, the first included angle S1 between the moving cutting edge of the moving cutter tooth and the stationary cutting edge of the corresponding stationary cutter tooth is: 90° > S1 > 0°.

[0008] Preferably, viewed from the orthographic projection direction of the central axis of the moving blade, the front and rear angles of each moving blade tooth in the moving blade are connected to form an inclined moving blade. With the vertical extension line of the front angle as a reference, the second included angle S2 between the moving blade and the vertical extension line is 15° to 45°, and the third included angle S3 between adjacent moving blades is a multiple of the second included angle S2.

[0009] Preferably, a plurality of stationary blade teeth and guide grooves between adjacent stationary blade teeth form a trimming ring in a ring array. The trimming ring has multiple sets of coaxial and radially separated guide grooves formed in a circular stationary blade. Each guide groove in at least two trimming rings has at least one closed end. The moving blades include outer and inner cutting blades of different diameters, which are coaxially mounted in the moving blade holder. The outer cutting blades rotate along the outer ring of the multiple sets of trimming rings under external force, and the multiple moving blade teeth in the outer cutting blades rotate to approach the outer ring trimming ring. When any stationary blade of the outer cutter is at its stationary edge, a first included angle S1 is formed between the moving blade of the outer cutter and the stationary blade of the corresponding stationary blade. Under the drive of external force, the inner cutter rotates along the inner ring of the multi-ring trimming ring. When the multiple moving blades of the inner cutter rotate and approach the stationary blade of any stationary blade of the inner ring trimming ring, a fourth included angle S4 is formed between the moving blade of the inner cutter and the stationary blade of the corresponding stationary blade. The first included angle S1 and the fourth included angle S4 are the same or different angles.

[0010] Preferably, the first included angle S1 and the fourth included angle S4 are at different angles, and the first included angle S1 is smaller than the fourth included angle S4, wherein the fourth included angle S4 is 10° to 45°.

[0011] Preferably, the number of moving teeth in the outer cutter and the inner cutter is the same or different.

[0012] Preferably, the number of moving teeth in the outer cutter and the inner cutter are different, and the number of moving teeth in the inner cutter is less than the number of moving teeth in the outer cutter.

[0013] Preferably, viewed from the orthographic projection direction of the central axis of the internal cutting blade, the front and rear angles of each moving tooth in the internal cutting blade are connected to form an inclined moving cutting edge. Taking the vertical extension line of the front angle as a reference, the fifth included angle S5 between the moving cutting edge and the vertical extension line is 20° to 60°, and the sixth included angle S6 between adjacent moving cutting edges is greater than the fifth included angle S5.

[0014] Based on the above embodiments, this application also proposes a technical solution for a shaving tool, which includes the above-mentioned enclosed hair trimming head.

[0015] The beneficial effect of this invention is that the movement trajectory of the front angle of the moving blade passes through the hair guide groove, while the movement trajectory of the rear angle is placed outside the hair guide groove. When an external force drives the moving blade to move along the stationary blade, causing the moving blade teeth to approach any of the stationary blade teeth, a first included angle S1 is formed between the moving blade and the stationary blade, meaning the moving blade is inclined relative to the stationary blade. This inclined moving blade drives the hair entering the hair guide groove towards the closed end of the groove. When the front angle of the moving blade contacts the stationary blade, the moving and stationary blades work together to form a temporary enclosed space within the hair guide groove, confining the hair within this space and effectively preventing it from escaping. Since the movement trajectory of the rear angle is outside the closed end of the hair guide groove, when the front and rear angles pass over the stationary blades, all the hair within the enclosed space can be cut off, increasing the amount of hair trimmed per pass and improving the hair trimming efficiency of the hair trimming scissors. Attached Figure Description

[0016] Figure 1 Assembly structure diagram of existing hair trimmer heads

[0017] Figure 2 This is an assembly structure diagram of the enclosed hair trimmer head according to an embodiment of the present invention.

[0018] Figure 3 This is a front view of the moving blade (external cutting blade) in an embodiment of this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the moving blade (external cutting blade) in an embodiment of this utility model.

[0020] Figure 5 This is a schematic diagram of the assembly of the moving blade (internal cutting blade) in an embodiment of this utility model.

[0021] Figure 6 This is a front view of the stationary blade in an embodiment of the present invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the stationary blade in an embodiment of this utility model.

[0023] Figure 8 This is a front view of the moving blade (internal cutting blade) in an embodiment of the present invention.

[0024] Figure 9 This is a three-dimensional assembly structure diagram of the moving blade (outer cutting blade and inner cutting blade) and the moving blade holder in an embodiment of this utility model.

[0025] Figure 10 Exploded view of the enclosed hair trimmer head equipped with a double-moving blade according to an embodiment of this utility model. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 2-10The embodiments of this utility model are further described below:

[0027] This utility model is a surround-type hair trimmer head, including a stationary blade 4 and at least one movable blade 5 that moves relative to the stationary blade 4. The stationary blade 4 is provided with a plurality of spaced stationary blade teeth 41, and the movable blade 5 is provided with a plurality of movable blade teeth 51. The movable blade teeth 51 move relative to the stationary blade teeth 41 to cut the hair. A hair guide groove 42 is formed between adjacent stationary blade teeth 41 in the stationary blade 4 for guiding the hair. Each hair guide groove 42 has at least one closed end to prevent the hair from sliding in from one end and out from the other end. One or more moving blades 5 can be installed inside the stationary blade 4 to improve hair trimming efficiency. Each moving blade tooth 51 in one moving blade 5 has a front angle 511 and a rear angle 512. The front angle 511 refers to the part where the moving blade tooth 51 first contacts the side edge of the stationary blade 4 to form a shearing force when it moves relative to the stationary blade tooth 41 (which can be understood as the beginning of hair trimming by a single stationary blade tooth 41). The rear angle 512 refers to the part where it finally forms a shearing force with the side edge of the stationary blade tooth 41 (which can be understood as the end of hair trimming by a single stationary blade tooth 41). The front angle 511 and the rear angle 512 are connected to form a moving blade 52, that is, the front angle 511 and the rear angle 512 are also part of the moving blade 52.

[0028] When the moving blade 5 rotates along the stationary blade 4 under the drive of an external force, the movement trajectory of the front angle 511 of each moving blade tooth 51 passes through the hair guide groove 42, and the movement trajectory of the rear angle 512 is outside the closed end of the hair guide groove 42. Each stationary blade tooth 41 is provided with at least one stationary blade 43 that cooperates with the moving blade 52 to form a shearing force. When the external force drives the moving blade tooth 51 to approach any of the stationary blade teeth 41, a first included angle S1 is formed between the moving blade 52 and the stationary blade 43, that is, the moving blade 52 is inclined relative to the stationary blade 43. In this way, the inclined moving blade 52 drives the hair that enters the hair guide groove 42 towards the closed end of the hair guide groove 42. When the front corner 511 of the moving blade 51 contacts the stationary blade 43, the moving blade 52 and the stationary blade 43 (as well as the bottom edge of the guide groove 42, which can also be considered part of the stationary blade 43) work together to form a temporary enclosed space 44 within the guide groove 42. The hair is confined within this enclosed space 44, effectively preventing it from escaping from the guide groove 42. Since the movement trajectory of the rear corner 512 is outside the closed end of the guide groove 42, when the front corner 511 and the rear corner 512 pass over the stationary blade 43, all the hair within the enclosed space 44 can be cut off, increasing the amount of hair trimmed per single pass by a single moving blade 51 and improving the hair trimming efficiency of the hair trimming head.

[0029] Secondly, the moving blade 52 and the stationary blade 43 form a first included angle S1, that is, the moving blade 52 is inclined relative to the stationary blade 43, which adjusts the cutting angle between the moving blade 52 and the stationary blade 43 accordingly, making the cutting sharpness between the moving blade 52 and the stationary blade 43 higher and the hair trimming performance better.

[0030] The so-called temporary enclosed space 44 refers to the enclosed space formed temporarily between the moving edge 52 of the moving tooth 51 and the side wall of the guide groove 42 when any moving tooth 51 in the moving knife 5 approaches any guide groove 42 in the stationary knife 4. After the rear corner 512 of the moving tooth 51 crosses the corresponding guide groove 42, the temporary enclosed space 44 disappears and is formed in the next adjacent guide groove 42.

[0031] To prevent hair entering the guide groove 42 from escaping under the drive of the moving blade 52, when the moving blade 51 is driven by external force to approach any stationary blade 41, the first included angle S1 formed between the moving blade 52 of the moving blade 51 and the stationary blade 43 of the corresponding stationary blade 41 is: 90° > S > 0°. The larger the first included angle S1 between the moving blade 52 and the stationary blade 43, the larger the area of ​​the temporary enclosed space 44 in the guide groove 42 when the front angle 511 of the moving blade 51 contacts the stationary blade 43. This allows for the enclosure and accommodation of more hair to be cut, which in turn requires a larger shearing force to trim the hair. This places higher demands on the torque of the drive mechanism. Conversely, if the first included angle S1 between the moving blade 52 and the stationary blade 43 is small, then when the rake angle 511 of the moving blade 51 contacts the stationary blade 43, the area of ​​the temporary enclosed space 44 within the hair guide groove 42 will be relatively smaller, and the amount of hair to be cut that can be accommodated within the enclosed space 44 will be reduced accordingly. To balance the hair trimming effect and cutting sharpness of the trimmer head, in this embodiment, the first included angle S1 between the moving blade 52 and the stationary blade 43 is preferably: 30° > S ≥ 5°. The specific angle can be determined according to actual needs, and this embodiment does not impose further limitations.

[0032] The above technical solution can be applied not only to reciprocating hair trimmer heads but also to rotary hair trimmer heads. When applied to a reciprocating hair trimmer head, it is necessary to have a moving blade 52 that is inclined at an angle relative to the stationary blade 43 on both sides of the moving blade 51, and that can form a temporarily closed enclosed space 44 within the hair guide groove 42. However, a rotary hair trimmer head only requires a moving blade 52 on one side of the moving blade 51. Therefore, in this embodiment, a rotary hair trimmer head is preferred.

[0033] The following presents two implementation methods for rotary hair trimmer heads, one of which is a single-action encircling hair trimmer head implementation method:

[0034] Example 1

[0035] To facilitate rotating hair trimming, the stationary blade 4 is circular. A ring-shaped trimming ring 45 is formed by a series of stationary blade teeth 41 and guide grooves 42 between adjacent stationary blade teeth 41, and is coaxially arranged with the stationary blade 4. Each guide groove 42 within the trimming ring 45 has at least one closed end. The moving blade 5 is mounted on a moving blade holder 6 and rotates along the trimming ring 45 as the moving blade holder 6 rotates. Each moving blade tooth 51 in the moving blade 5 has a front angle 511 and a rear angle 512. The front angle 511 and the rear angle 512 are connected to form a moving blade edge 52. The rotational trajectory of the front angle 511 passes through the guide groove 42, and the rotational trajectory of the rear angle 512 is outside the closed end of the guide groove 42. Each stationary blade tooth 41 is provided with at least one stationary blade edge 43 that cooperates with the moving blade edge 52 to form a shearing force. When an external force drives the moving blade tooth 51 to approach any stationary blade tooth 41 in the stationary blade 4, a shearing force is formed between the moving blade edge 52 and the stationary blade edge 43. The first included angle S1 is 6°±1°. Even if the moving blade 52 is inclined relative to the stationary blade 43, the inclined moving blade 52 can drive the hair entering the hair guide groove 42 towards the closed end of the hair guide groove 42. The smaller first included angle S1 can maximize the cutting sharpness of the moving blade teeth 51, so that the moving blade 52 can cut the hair when it comes into contact with the hair, avoiding the hair being too concentrated and unable to be cut, which would cause hair pulling or other phenomena.

[0036] When the front corner 511 of the moving blade 51 contacts the stationary blade 43, the moving blade 52 and the stationary blade 43 (as well as the bottom edge of the guide groove 42, which can also be considered part of the stationary blade 43) work together to form a temporary enclosed space 44 within the guide groove 42. The hair is confined within the temporary enclosed space 44, effectively preventing the hair from escaping from the guide groove 42. Since the rotation trajectory of the rear corner 512 is outside the closed end of the guide groove 42, when the front corner 511 and the rear corner 512 pass over the stationary blade 43, all the hair within the enclosed space 44 can be cut off, increasing the amount of hair trimmed per single pass by a single moving blade 51 and improving the hair trimming efficiency of the hair trimming head.

[0037] Of course, the inclination angle S1 between the moving blades 52 and the stationary blades 43 can be set to a larger angle. However, if the angle is too large, such as 45°, 60°, or 80°, the width of the moving blades 51 will be reduced, thereby reducing the working intensity of the moving blades 51. When there is a lot of hair, the moving blades 51 are prone to twisting and deformation, affecting the hair trimming performance of the moving blades 511. Furthermore, when the inclination angle S1 is too large, it will also increase the area of ​​the enclosed space 44. When too much hair to be trimmed is concentrated in the same hair guide groove 42, it will place higher demands on the output torque of the drive mechanism, which will correspondingly increase the drive mechanism (i.e., the motor, not shown in the figure). Secondly, an excessively large inclination angle S1 will also reduce the cutting sharpness between the moving blades 52 and the stationary blades 43, reducing the hair trimming performance of the trimmer head. Therefore, setting the first angle S1 to 6° is the preferred embodiment.

[0038] Viewed from the orthographic projection direction of the central axis of the moving blade 5, the front angle 511 and rear angle 512 of each moving blade tooth 51 in the moving blade 5 are connected to form an inclined moving blade 52. Taking the vertical extension line of the front angle 511 as a reference (the vertical extension line must be parallel to the central axis of the moving blade 5 or the outer cutting blade 5a), the second included angle S2 between the moving blade 52 and the vertical extension line is 15° to 45°, and the third included angle S3 between adjacent moving blades 52 is a multiple of the second included angle S2. In actual production, the angle S2 between the moving blade 52 and the vertical extension line is a divisor of the circumferential angle. This ensures that the interval angle between adjacent moving blade teeth 51 in the moving blade 5 is the same, guaranteeing the balance and working stability of the moving blade 5 during rotary cutting. The second included angle S2 is preferably 15°.

[0039] The third included angle S3 between adjacent moving blades 52 is preferably a low multiple, such as 2 times. The smaller the multiple, the more moving blade teeth 51 there are in the moving blade 5. Under the condition that the output speed of the drive mechanism remains constant per unit time, the more moving blade teeth 51 there are, the higher the frequency of trimming of the hair guide groove 42 at the same position in the stationary blade 4, which correspondingly improves the trimming efficiency of hair. Based on this rule, in actual production, a drive mechanism (motor) with a lower speed can be appropriately selected to reduce the cost of the drive mechanism.

[0040] Of course, the third included angle S3 can also be selected with a larger multiple, such as 4 or 5 times. A higher multiple means that the number of moving blade teeth 51 in the moving blade 5 is reduced. To ensure the hair trimming efficiency of the moving blade teeth 51, there are usually only two ways. The first is to select a drive mechanism (i.e., a motor) with a higher speed to compensate for the lack of moving blade teeth 51 and ensure the hair trimming efficiency. The second is not to increase the speed of the drive mechanism (i.e., the motor). In this case, the time for the same moving blade tooth 51 to pass through the same hair guide groove 42 in the stationary blade 4 will be longer, which means that more hair to be trimmed can enter the hair guide groove 42. When the number of hair to be trimmed increases, the shearing force required for the moving blade teeth 51 is higher. At this time, it is necessary to select a drive mechanism with a higher output torque to increase the shearing force of the moving blade teeth 51 to ensure the hair trimming performance. However, no matter which method is used, it will increase the cost of the drive mechanism. Therefore, selecting a low multiple for the third included angle S3 is the preferred implementation method.

[0041] The following is an implementation method for a double-acting, enclosed hair trimmer head:

[0042] Example 2

[0043] To increase the hair-feeding area of ​​the hair trimmer head and improve hair trimming efficiency, several stationary blade teeth 41 and the guide grooves 42 between adjacent stationary blade teeth 41 are arranged in a ring array to form a trimming ring 45. The stationary blade 4 is circular and has multiple coaxial and radially separated trimming rings 45. In actual production, there are two rings of trimming rings 45. By setting two rings of trimming rings 45, the length of the guide grooves 42 in each trimming ring 45 is correspondingly reduced. During hair trimming, the space for hair movement is reduced, allowing it to be quickly cut by the blades 5, thus improving hair trimming efficiency. Secondly, by setting the two rings of trimming rings 45 radially separated, each trimming ring 45 has at least one closed end in the guide groove 42, and the closed ends of the guide grooves 42 in the two rings of trimming rings 45 are close to each other. This maximizes the surface utilization of the stationary blade 4, expands the effective hair-feeding area of ​​the stationary blade 4, and improves the hair-feeding efficiency of the stationary blade 4.

[0044] Furthermore, the two trimming rings 45 in the static blade 4 allow for control over the shape of the hair guide grooves 42 within the two trimming rings 45 to accommodate different hair shapes, such as... Figure 6 and 7 As shown, the hair guide groove 42 in the outer trimming ring 45 can be set in an open shape, which makes it easier for relatively long or curly hairs to enter the hair guide groove 42 from the peripheral side wall of the stationary blade 4, thereby improving the hair feeding efficiency of the stationary blade 4.

[0045] To meet the hair trimming needs of the two trimming rings 45 in the stationary blade 4, the moving blade 5 includes an outer cutting blade 5a and an inner cutting blade 5b, which are coaxially mounted on the moving blade holder 6. When the drive mechanism (not shown in the figure) drives the moving blade holder 6 to rotate, the outer cutting blade 5a and the inner cutting blade 5b can rotate along the two trimming rings 45 in the stationary blade 4, respectively. When the outer cutter 5a and the inner cutter 5b rotate along their respective trimming rings 45 under external force, the trajectory of the front angle 511 of the outer cutter 5a passes through each guide groove 42 in the outer trimming ring 45, and the trajectory of the rear angle 512 of the outer cutter 5a is outside each guide groove 42 in the outer trimming ring 45. Thus, the moving blade 52 of the outer cutter 5a drives the hair downwards and forms a first angle S1 with the stationary blade 43 of any stationary blade tooth 41 in the outer trimming ring 45. When the moving blade 52 contacts the stationary blade 43, it encloses the guide groove 42 into a temporary, four-sided closed space 44. Figure 2 As shown, when the rear angle 512 of the moving blade 51 in the outer cutter 5a passes the stationary blade 43, it can cut off all the hair in the hair guide groove 42, thereby increasing the amount of hair trimmed per single moving blade 51 in the outer cutter 5a and improving the hair trimming efficiency.

[0046] The moving blades 52 on each moving tooth 51 of the inner cutting blade 5b located below the inner trimming ring 45 can only drive the hair upwards, forming a fourth included angle S4 with the stationary blade 43 of any stationary tooth 41 in the inner trimming ring 45. When the moving blade 52 contacts the stationary blade 43, it forms a temporary enclosed space 44 within the hair guide groove 42. Figure 5 As shown, when the rear angle 512 moves past the corresponding stationary blade 4, it can cut off all the hair in the enclosed space 44, increasing the amount of hair trimmed per stroke by a single moving blade 51 in the inner cutting blade 5b, and improving the hair trimming effect.

[0047] Setting the moving blade 5 as separate outer cutting blade 5a and inner cutting blade 5b not only facilitates the production and processing of the outer cutting blade 5a and inner cutting blade 5b, but also facilitates the production and assembly of the moving blade 5, improving assembly efficiency. Of course, when two trimming rings 45 are set in the stationary blade 4, only one moving blade 5 can be set. However, setting a group of moving blade teeth 51 with different diameters in one moving blade 5 can also rotate along the corresponding two trimming rings 45 to cooperate with the stationary blade teeth 41 to cut hair. However, setting two groups of moving blade teeth 51 with different diameters in one moving blade 5 is not conducive to production and processing. Therefore, setting two independent outer cutting blades 5a and inner cutting blades 5b is the preferred embodiment.

[0048] Those skilled in the art should understand that, in the above-disclosed technical solution, more trimming rings 45 can be set in the stationary blade 4, such as three or four rings, and the moving blade 5 can also be set with three independent moving blades 5 or with three sets of moving blade teeth 51 arranged with different diameters on one moving blade 5 as needed. Therefore, the above-disclosed two rings of trimming rings 45 or two independent outer cutting blades 5a and inner cutting blades 5b are not limitations of this application. Those skilled in the art can increase or decrease the trimming rings 45 and moving blades 5 according to actual needs. As long as the movement trajectory of the front angle 511 of the moving blade teeth 51 passes through the guide groove 42 and the movement trajectory of the rear angle 512 is outside the guide groove 42, forming a temporarily closed enclosed space 44 around the guide groove 42, the technical purpose and technical effect of this application can be achieved.

[0049] In the stationary blade 4, each stationary blade tooth 41 is arranged radially at intervals from the center. This results in the cross-sectional area of ​​the guide groove 42 in the inner ring trimming ring 45 being smaller than that in the outer ring trimming ring 45. During use, the hair feeding effect is relatively poor due to the reduced cross-sectional area of ​​the guide groove 42 in the inner ring trimming ring 45. To ensure the hair feeding effect of each guide groove 42 in the outer and inner ring trimming rings 45, the first included angle S1 and the fourth included angle S4 are set to different angles according to the different cross-sectional areas of the guide groove 42. Furthermore, the angle of the first included angle S1 is smaller than that of the fourth included angle S4. Because the cross-sectional area of ​​each guide groove 42 in the outer trimming ring 45 is relatively large, the hair to be trimmed will enter the guide groove 42 in the outer trimming ring 45 more easily. In order to control the amount of hair entering and avoid excessive hair that cannot be cut all at once, causing hair pulling or jamming, the first included angle S1 is set to a small angle, preferably 6°±1°. This not only allows the moving blade teeth 51 of the outer cutter 5a to play a certain blocking role and control the amount of hair entering each guide groove 42 in the outer trimming ring 45, but also allows for higher sharpness with a smaller angle. This ensures the hair trimming performance of the outer cutter 5a and avoids hair pulling or jamming caused by hair not being cut all at once, thus improving the working stability and user comfort of the trimmer head.

[0050] Since the cross-sectional area of ​​each guide groove 42 in the inner trimming ring 45 is relatively small, in order to improve the hair intake efficiency of each guide groove 42 in the inner trimming ring 45, the angle of the fourth included angle S4 is set to be relatively large. The angle range of the fourth included angle S4 is 10° to 45°, preferably 30° ± 1°. By setting a larger angle, the obstruction of each moving blade tooth 51 in the inner cutting blade 5b to each guide groove 42 in the inner trimming ring 45 can be reduced, thereby improving the hair intake efficiency of each guide groove 42 in the inner trimming ring 45. Of course, the first included angle S1 and the fourth included angle S4 can also be set to the same angle, but setting the same angle will significantly reduce the hair intake effect of each guide groove 42 in the inner trimming ring 45, or cause too much hair to enter each guide groove 42 in the outer trimming ring 45. Therefore, it is a preferred embodiment to use different angles for the first included angle S1 and the fourth included angle S4.

[0051] Since the outer cutting blade 5a and the inner cutting blade 5b have different diameters and are coaxially mounted on the moving blade holder 6, in actual production, the outer cutting blade 5a and the inner cutting blade 5b can be set to the same or different numbers of moving blade teeth 51. However, since the outer cutting blade 5a and the inner cutting blade 5b have different diameters, if the same number of moving blade teeth 51 is selected, the spacing angle of the moving blade teeth 51 on the inner cutting blade 5b will be relatively small, too dense, which is not conducive to the production and processing of the inner cutting blade 5b. Therefore, in this embodiment, it is a preferred embodiment to select different numbers of moving blade teeth 51 for the outer cutting blade 5a and the inner cutting blade 5b, that is, the number of moving blade teeth 51 in the inner cutting blade 5b is less than the number of moving blade teeth 51 in the outer cutting blade 5a. By setting different numbers of moving blade teeth 51, when coaxially mounted on the moving blade holder 6, the moving blade teeth 51 of the outer cutting blade 5a and the inner cutting blade 5b can be staggered. This can avoid mutual interference between the outer cutting blade 5a and the inner cutting blade 5b during the trimming process, prevent the cut hair fragments from concentrating in one place, delay the discharge of hair fragments and cause blockage of the hair guide groove 42, and ensure the working stability of the trimming head and the efficiency of hair trimming.

[0052] Viewed from the orthographic projection direction of the central axis of the inner cutting blade 5b, the front angle 511 and rear angle 512 of each moving blade tooth 51 in the inner cutting blade 5b are connected to form an inclined moving blade 52. Taking the vertical extension line of the front angle 511 as a reference (the vertical extension line must be parallel to the central axis of the inner cutting blade 5b), the fifth included angle S5 between the moving blade 52 and the vertical extension line is 20° to 60°, preferably 35°. The sixth included angle S6 between adjacent moving blades 52 is greater than the fifth included angle S5. In actual production, the angle value of the sixth included angle S6 is 40°. In this way, the inner cutting blade 5b can be divided into 9 moving blade teeth 51.

[0053] The attached drawings in this application show a double-acting blade enclosed hair trimmer head. If a single-acting blade is used, the inner cutting blade 5b can be omitted.

[0054] Based on the above, the applicant also proposes a technical solution for a shaving tool, which includes any one of the enclosed hair trimming heads in the two embodiments described above.

[0055] 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 surround-type hair trimmer head, comprising a stationary blade (4) and at least one movable blade (5) moving relative to the stationary blade (4), wherein the stationary blade (4) is provided with a plurality of spaced stationary blade teeth (41), and the movable blade (5) is provided with a plurality of movable blade teeth (51) that cooperate with the stationary blade teeth (41) to cut hair; characterized in that In the stationary cutter (4), a guide groove (42) is formed between adjacent stationary cutter teeth (41), and each guide groove (42) has at least one closed end. In at least one moving cutter (5), each moving cutter tooth (51) has a front angle (511) and a rear angle (512), and the front angle (511) and the rear angle (512) are connected to form a moving cutting edge (52). The movement trajectory of the front angle (511) of each moving cutter tooth (51) passes through the guide groove (42), and the movement trajectory of the rear angle (512) is outside the closed end of the guide groove (42). At least one [missing information] is provided on each stationary cutter tooth (41). A stationary blade (43) that works in conjunction with the moving blade (52) to form a shearing force; when the moving blade (51) approaches any stationary blade (41) under the drive of an external force, a first included angle S1 is formed between the moving blade (52) and the stationary blade (43) on the corresponding stationary blade (41), and when the front angle (511) of the moving blade (51) contacts the stationary blade (43), at least one temporary enclosed space (44) is formed in the hair guide groove (42), and when the rear angle (512) moves past the stationary blade (43), the hair in the enclosed space (44) can be cut off.

2. The enclosed hair trimmer head according to claim 1, characterized in that... The stationary blade (4) is circular, and a number of stationary blade teeth (41) and the guide grooves (42) between adjacent stationary blade teeth (41) form a ring array to form a trimming ring (45) which is coaxially arranged with the stationary blade (4). Each guide groove (42) in the trimming ring (45) has at least one closed end. The moving blade (5) is mounted on the moving blade seat (6) and rotates along the trimming ring (45) as the moving blade seat (6) rotates. A number of moving blade teeth (51) in the moving blade (5) are arranged in a ring array, and when any moving blade tooth (51) rotates close to any stationary blade tooth (41) in the trimming ring (45), a first included angle S1 is formed between the moving blade edge (52) on each moving blade tooth (51) and the stationary blade edge (43) on the corresponding stationary blade tooth (41).

3. The enclosed hair trimmer head according to claim 1, characterized in that... When an external force drives the moving cutter tooth (51) to approach any stationary cutter tooth (41), the first included angle S1 between the moving cutting edge (52) of the moving cutter tooth (51) and the stationary cutting edge (43) of the corresponding stationary cutter tooth (41) is: 90° > S1 > 0°.

4. The enclosed hair trimmer head according to claim 1, characterized in that... Looking from the orthographic projection direction of the central axis of the moving blade (5), the front angle (511) and rear angle (512) of each moving blade tooth (51) in the moving blade (5) are connected to form an inclined moving blade (52). Taking the vertical extension line of the front angle (511) as the reference, the second included angle S2 between the moving blade (52) and the vertical extension line is 15° to 45°, and the third included angle S3 between adjacent moving blades (52) is a multiple of the second included angle S2.

5. The enclosed hair trimmer head according to claim 1, characterized in that... A number of stationary blade teeth (41) and the guide grooves (42) between adjacent stationary blade teeth (41) form a trimming ring (45) in a ring array. The trimming ring (45) has multiple sets of coaxial and radially separated guide grooves formed in the circular stationary blades (4). Each guide groove (42) in at least two trimming rings (45) has at least one closed end. The moving blade (5) includes an outer cutting blade (5a) and an inner cutting blade (5b) of different diameters, which are coaxially mounted in the moving blade holder (6). The outer cutting blade (5a) rotates along the outer ring trimming ring (45) of the multiple sets of trimming rings (45) under the drive of external force, and rotates to approach any of the multiple moving blade teeth (51) in the outer ring trimming ring (45). When the stationary blade (43) of a stationary blade tooth (41) is in contact with the stationary blade edge (43), a first included angle S1 is formed between the moving blade edge (52) in the outer cutter (5a) and the stationary blade edge (43) in the corresponding stationary blade tooth (41); the inner cutter (5b) rotates along the inner ring trimming ring (45) in the multi-ring trimming ring (45) under the drive of external force, and when the multiple moving blade teeth (51) in the inner cutter (5b) rotate and approach the stationary blade edge (43) of any stationary blade tooth (41) in the inner ring trimming ring (45), a fourth included angle S4 is formed between the moving blade edge (52) in the inner cutter (5b) and the stationary blade edge (43) in the corresponding stationary blade tooth (41), wherein the first included angle S1 and the fourth included angle S4 are the same or different angles.

6. The enclosed hair trimmer head according to claim 5, characterized in that... The first included angle S1 and the fourth included angle S4 are at different angles, and the first included angle S1 is smaller than the fourth included angle S4, wherein the fourth included angle S4 is 10° to 45°.

7. The enclosed hair trimmer head according to claim 5, characterized in that... The number of moving teeth (51) in the external cutter (5a) and the internal cutter (5b) may be the same or different.

8. The enclosed hair trimmer head according to claim 5, characterized in that... The number of moving teeth (51) in the outer cutter (5a) and the inner cutter (5b) is different, and the number of moving teeth (51) in the inner cutter (5b) is less than the number of moving teeth (51) in the outer cutter (5a).

9. The enclosed hair trimmer head according to claim 5, characterized in that... Looking from the orthographic projection direction of the central axis of the internal cutting blade (5b), the front angle (511) and rear angle (512) of each moving cutting tooth (51) in the internal cutting blade (5b) are connected to form an inclined moving cutting edge (52). Based on the vertical extension line of the front angle (511), the fifth included angle S5 between the moving cutting edge (52) and the vertical extension line is 20° to 60°, and the sixth included angle S6 between adjacent moving cutting edges (52) is greater than the fifth included angle S5.

10. A shaving tool, characterized in that... The included enclosed hair trimmer head according to any one of claims 1 to 9.

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