Single-shaft two-way rotating hair trimmer

Abstract

The utility model relates to a single-shaft bidirectional rotating hair trimmer which is characterized in that a transmission part in coaxial clearance fit with a rotating shaft is arranged outside the rotating shaft, and a static knife is mounted on the transmission part; the transmission part is in linkage connection with the rotating shaft and synchronously rotates along with the rotating shaft at a second rotating speed to output kinetic energy to drive the static cutter and the moving cutter to synchronously rotate, and the second rotating speed of the transmission part is lower than the first rotating speed of the rotating shaft. The utility model has the beneficial effects that the transmission piece is coaxially arranged outside the rotating shaft, and the transmission piece drives the static cutter to synchronously rotate and dynamically adjust in real time at the second rotating speed lower than the first rotating speed of the rotating shaft, so that hairs in different growth directions smoothly enter the static cutter through the pores, and the inclination angle of the hairs entering the static cutter is changed; and the hair trimming benefit of the static knife is improved. Secondly, the single-shaft motor can output two different rotating speeds through the transmission part, the energy utilization benefit is improved, the transmission structure is optimized, different driving mechanisms do not need to be arranged to drive the static cutter and the movable cutter respectively, the production cost is saved, and occupied space is reduced.

Description

Technical Field

[0001] The utility model relates to a hair trimming tool, in particular to a hair trimmer with a single shaft synchronously outputting different rotation speeds to form bidirectional rotation, belonging to the field of hair trimming tools. Background Art

[0002] Existing hair trimmers, especially rotary hair trimmers, such as nose hair trimmers and rotary shavers, basically have an annular static blade and a dynamic blade that rotates and cuts along the inner surface of the static blade. Existing static blades basically rely on a static blade holder to fix them, which means that the direction of the hair inlet hole set in the static blade is fixed, while the hair on the human body must have different growth directions due to factors such as space and environment. Therefore, there will inevitably be some hairs whose growth direction is inconsistent with the direction of the hair inlet hole in the static blade. When the static blade is fixed, hair with different growth directions is not easy to enter the static blade, which reduces the hair feeding efficiency of the static blade.

[0003] Secondly, when the hair enters the static blade through the hair inlet hole, the hair entry angle will basically not change. If the hair entry angle of the static blade is opposite to the rotation direction of the moving blade, when the moving blade contacts and pushes the hair, the hair will be restricted by the inner wall of the static blade entrance hole and a reaction force will be formed, thereby facilitating the moving blade to cut the hair. If the hair entry angle of the static blade is the same as the rotation direction of the moving blade, especially the hair in front of the moving blade's rotation trajectory, when the moving blade contacts and pushes the hair, it will only run over the hair, especially when the clearance between the moving blade and the static blade is larger than the hair diameter. Therefore, the hair trimming efficiency of a fixed static blade is relatively poor. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a single-axis bidirectional rotating hair trimmer, which utilizes the rotating shaft of the driving mechanism and the transmission member integrated outside the rotating shaft to synchronously drive the stationary knife and the moving knife, so that the stationary knife can be dynamically adjusted in real time, which not only facilitates the entry of hair with different growth directions through the hair entry hole, thereby improving the hair entry efficiency of the stationary knife; at the same time, it can also adjust the inclination angle of the hair entering the stationary knife, thereby facilitating the moving knife to trim the beard and improving the beard trimming efficiency.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is a single-axis bidirectional rotating hair trimmer, including a body and a cutter head assembly installed on the body, a driving mechanism is installed in the body, the cutter head assembly includes a stationary cutter and a movable cutter, the movable cutter is connected to the rotating shaft of the driving mechanism and can rotate along the stationary cutter for cutting when driven by a first rotation speed of the rotating shaft; a transmission member with a coaxial clearance fit is provided outside the rotating shaft, and the stationary cutter is installed on the transmission member; the transmission member is linked to the rotating shaft, and synchronously follows the rotation of the rotating shaft at a second rotation speed to output kinetic energy to drive the stationary cutter to rotate synchronously relative to the movable cutter, and the second rotation speed of the transmission member is lower than the first rotation speed of the rotating shaft.

[0006] Preferably, the second rotational speed direction of the transmission member is the same as or opposite to the first rotational speed direction of the rotating shaft.

[0007] Preferably, a spline is provided on the rotating shaft and a main gear is fixed at the spline, and the main gear rotates synchronously with the first speed of the rotating shaft; the transmission member is connected to the main gear and outputs kinetic energy at a second speed lower than the first speed of the rotating shaft to drive the stationary knife to rotate.

[0008] Preferably, the transmission member includes a transmission plate, a sub-gear and a gear sleeve. The gear sleeve is in the shape of a hollow ring and is provided with a plurality of transmission teeth on its inner circumferential side wall. The transmission plate is provided with at least one and is sleeved outside the rotating shaft and is clearance-matched with the rotating shaft. The sub-gear is mounted on the transmission plate and is respectively meshed with the transmission teeth and the main gear; one end of the gear sleeve is connected and fixed to the outer casing of the driving mechanism, and the other end rotatably confines the transmission plate in the gear sleeve, so that one end face of the transmission plate is placed outside the gear sleeve for connection and fixation with the static knife.

[0009] Preferably, the transmission plate includes a first reduction plate, a second reduction plate and a third reduction plate which are stacked and sleeved along the rotating shaft and cooperate with the rotating shaft clearance. The first reduction plate can rotatably cooperate with the gear sleeve and its end face is placed outside the gear sleeve for connecting and fixing with a static knife; secondary gears are respectively provided on the upper end faces of the second reduction plate and the third reduction plate; a plurality of gear shafts distributed in a planetary manner are respectively provided on the lower end face of each reduction plate and a sub-gear is respectively installed outside each gear shaft, and the sub-gear installed on the lower end face of the first reduction plate meshes with the secondary gear on the upper end face of the second reduction plate and the transmission teeth on the gear sleeve; the sub-gear installed on the lower end face of the second reduction plate meshes with the secondary gear of the third reduction plate and the transmission teeth on the gear sleeve; the sub-gear installed on the lower end face of the third reduction plate meshes with the main gear outside the rotating shaft and the transmission teeth on the gear sleeve, so that the second rotation speed of the first reduction plate is lower than the first rotation speed of the rotating shaft, and the first reduction plate and the rotating shaft rotate in opposite directions.

[0010] Preferably, the gear sleeve is detachably connected and fixed to the base, and the base is placed on an end surface of a rotating shaft of the driving mechanism and is fixedly connected to the driving mechanism.

[0011] Preferably, two hook rings and positioning holes are relatively provided on the outer peripheral side wall of the gear sleeve, and corresponding positions of the base are provided with barbed pins and positioning inserts, and each pin and positioning insert can be respectively inserted into the hook ring and the positioning hole to make the gear sleeve and the base detachably connected and fixed.

[0012] Preferably, a limiting ring is provided at the port of the gear sleeve, and the inner diameter of the limiting ring is larger than the outer diameter of the first reduction plate, so that the first reduction plate can be rotatably placed in the gear sleeve.

[0013] Preferably, a limiting boss is provided on the upper end surface of the first speed reducer, and a limiting groove is provided at a relative position on the limiting boss. The adapter seat is sleeved outside the limiting boss and the limiting block provided on the adapter seat is snapped into the limiting groove so that the adapter seat and the first speed reducer are detachably fixed. An annular plug-in ring is provided at the center of the adapter seat, which passes through the machine body and is placed outside the machine body for installing a stationary knife, and the rotating shaft passes through the plug-in ring and is connected to the moving knife.

[0014] Preferably, the stationary knife is installed on the stationary knife seat, the inner diameter of the stationary knife seat matches the outer diameter of the plug-in ring and is sleeved outside the plug-in ring and detachably connected and fixed to the plug-in ring, and the bottom end surface of the stationary knife seat is spaced apart from the upper end surface of the body.

[0015] The beneficial effect of the utility model is that a transmission member installed coaxially outside the rotating shaft is provided, and the transmission member outputs kinetic energy at a second speed lower than the first speed of the rotating shaft to drive the stationary knife to rotate synchronously with the moving knife. The rotating stationary knife can be dynamically adjusted in real time, so that hair with different growth directions can smoothly enter the stationary knife through the hair inlet hole and be trimmed by the moving knife, and the hair inclination angle of the hair entering the stationary knife is changed to be opposite to the rotation direction of the moving knife, thereby facilitating hair trimming and improving the hair trimming efficiency of the stationary knife. Secondly, by connecting the transmission member with the rotating shaft, the output power of the motor is utilized to the maximum extent to achieve the output of two different speeds, so that the stationary knife and the moving knife rotate synchronously, and the energy utilization efficiency is improved; the transmission structure is optimized, and there is no need to set different drive mechanisms to drive the stationary knife and the moving knife respectively, saving production costs and reducing the internal space occupied by the hair trimmer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural diagram of a single-axis bidirectionally rotating hair trimmer according to an embodiment of the utility model

[0017] Figure 2 This is an internal assembly diagram of a single-axis bidirectional rotating hair trimmer according to an embodiment of the utility model.

[0018] Figure 3 A partial three-dimensional cross-sectional view of a single-axis bidirectional rotating hair trimmer according to an embodiment of the utility model

[0019] Figure 4 The three-dimensional assembly diagram of the driving mechanism and the transmission member in the embodiment of the utility model is shown in FIG.

[0020] Figure 5 A three-dimensional cross-sectional view of the drive mechanism and the transmission member in the embodiment of the utility model

[0021] Figure 6 A three-dimensional rotating cross-sectional view of the driving mechanism and the transmission member in the embodiment of the utility model

[0022] Figure 7 A three-dimensional structural diagram of the driving mechanism in the embodiment of the utility model

[0023] Figure 8 This is a front perspective view of the first deceleration plate in the embodiment of the utility model

[0024] Fig. 9 This is a bottom perspective view of the first speed reduction disc in the embodiment of the utility model.

[0025] Fig.10 This is a front view of the second speed reduction disc in the embodiment of the utility model.

[0026] Fig.11 This is a bottom perspective view of the second speed reduction disc in the embodiment of the utility model.

[0027] Fig.12 This is a front perspective view of the gear sleeve in the embodiment of the utility model

[0028] Fig.13 This is a bottom perspective view of the gear sleeve in the embodiment of the utility model

[0029] Fig.14 A three-dimensional structural diagram of the base in the embodiment of the utility model

[0030] Fig.15 This is a front view of the adapter in the embodiment of the utility model.

[0031] Fig.16 This is a bottom perspective view of the adapter in the embodiment of the utility model.

[0032] Fig.17 The three-dimensional structure diagram of the static knife seat in the embodiment of the utility model DETAILED DESCRIPTION

[0033] The following is combined with Figures 1 to 17 The implementation mode of the utility model is further described as follows:

[0034] The utility model is a single-axis bidirectional rotating hair trimmer, comprising a body 1 and a cutter head assembly mounted on the body 1, a driving mechanism 2 is mounted in the body 1, the driving mechanism 2 is a motor, powered by a battery 3, the cutter head assembly comprises a stationary cutter 4 and a movable cutter 5, the movable cutter 5 is connected to a rotating shaft 21 of the driving mechanism 2 and can be rotated along the stationary cutter 4 for cutting when driven by a first rotation speed of the rotating shaft 21; the stationary cutter 4 is used for capturing and introducing hair, that is, a hair inlet groove or hair inlet hole for hair to enter is provided on the stationary cutter 4, and since the stationary cutter 4 of the rotary hair trimmer is basically circular or cylindrical, the orientation angles of the hair inlet groove or hair inlet hole will inevitably be different.

[0035] In order to solve the technical problems that the static blade 4 in the existing rotary hair trimmer is installed in a stationary manner, which makes it difficult for hair to enter the static blade 4 due to different growth angles, reduces the hair feeding efficiency and the inclination angle of the hair after entering the static blade 4 is not conducive to the trimming of the movable blade 5, thereby reducing the hair trimming performance and hair trimming efficiency, the technical solution adopted by the utility model is that a transmission member 6 with a coaxial clearance fit is provided outside the rotating shaft 21, and the static blade 4 is installed on the transmission member 6; the transmission member 6 is linked to the rotating shaft 21, and synchronously follows the rotation of the rotating shaft 21 at a second speed to output kinetic energy to drive the static blade 4 to rotate synchronously with the movable blade 5, and the second speed of the transmission member 6 is lower than the first speed of the rotating shaft 21. By arranging a transmission member 6 coaxially mounted outside the rotating shaft 21, and making the transmission member 6 output kinetic energy at a second speed lower than the first speed of the rotating shaft 21 to drive the static knife 4 to rotate synchronously with the moving knife 5, the rotating static knife 4 can be dynamically adjusted in real time, so that hair with different growth directions can smoothly enter the static knife 4 through the hair inlet hole or the hair inlet groove to be trimmed by the moving knife 5, and the hair inclination angle of the hair entering the static knife 4 is changed to be opposite to the rotation direction of the moving knife 5, thereby facilitating hair trimming and improving the hair trimming efficiency of the static knife 4. Secondly, by using the transmission member 6 to be linked with the rotating shaft 21, when the motor drives the rotating shaft 21 to rotate at the first speed, the transmission member 6 can rotate synchronously with the moving knife 5 at the second speed, and the output power of the motor is used to the maximum extent to achieve the output of two different speeds, so that the static knife 4 and the moving knife 5 rotate synchronously, and the energy utilization efficiency is improved; the transmission structure is optimized, and there is no need to set different driving mechanisms 2 to drive the static knife 4 and the moving knife 5 respectively, saving production costs and reducing the internal space occupied by the hair trimmer.

[0036] During actual use, the rotating shaft 21 is used to drive the moving blade 5 to rotate at a first speed, and the stationary blade 4 can be connected to the transmission member 6. Driven by the rotating shaft 21, the transmission member 6 can drive the stationary blade 4 to rotate at a lower second speed to adjust the direction of the hair inlet hole or hair inlet groove in the stationary blade 4 to adapt to the hair in different growth directions entering the stationary blade 4 through the hair inlet hole or hair inlet groove, and dynamically adjust the inclination angle of the hair after entering the stationary blade 4, so that the hair entering the stationary blade 4 is at a trimming inclination angle opposite to the rotation direction of the moving blade 5, thereby achieving the purpose of improving the hair trimming efficiency. Since the stationary blade 4 needs to take into account the introduction of hair and cooperate with the moving blade 5 to trim the hair, the second speed of the transmission member 6 must be lower than the first speed of the rotating shaft 21. If it rotates too fast, the hair cannot enter the stationary blade 4 through the hair inlet hole and hair inlet groove.

[0037] The first speed refers to the rated output speed of the motor shaft 21. The second speed is formed by deceleration based on the first speed. The deceleration can be one-stage deceleration or multi-stage deceleration, which can be determined according to actual needs. Therefore, the second speed is not a specific value, but is only used to limit the rotation speed of the transmission member 6 to be lower than the shaft 21. This is hereby explained.

[0038] To facilitate hair trimming, the second speed rotation direction of the transmission member 6 is the same as or opposite to the first speed rotation direction of the rotating shaft 21. Preferably, the transmission member 6 rotates synchronously in opposite directions. Setting the second speed direction of the transmission member 6 to be opposite to the first speed direction of the rotating shaft 21 is equivalent to increasing the speed of the moving knife 5, thereby improving the hair trimming efficiency of the moving knife 5. For example, when the static knife 4 is stationary, the time when the moving knife 5 meets a certain position of the static knife 4 along the rotation of the static knife 4 is constant. When the static knife 4 moves in the opposite direction to the moving knife 5, assuming that the first speed of the moving knife 5 in this embodiment is 10, and the second speed of the static knife 4 is 1, the transmission ratio is 10:1, that is, for every 10 rotations of the moving knife 5, the static knife 4 rotates 1 circle. When the moving knife 5 rotates 1 circle, the number of rotations of the static knife 4 is 1 / 10, so that the time when the moving knife 5 meets a certain position of the static knife 4 is reduced by 1 / 10, and the speed of the moving knife 5 is correspondingly increased by 1 / 10 (that is, the first speed of the rotating shaft 21 is increased by 10%). Of course, the transmission member 6 and the rotating shaft 21 can also be set to rotate in the same direction, but there must be a speed difference between the rotating shaft 21 and the transmission member 6, for example, the second rotation speed of the transmission member 6 is lower than the first rotation speed of the rotating shaft 21, or the second rotation speed of the transmission member 6 is higher than the first rotation speed of the rotating shaft 21, etc. Only in this way can the static knife 4 and the movable knife 5 achieve hair trimming, but because the transmission member 6 and the rotating shaft 21 rotate in opposite directions, the hair trimming efficiency can be effectively improved. Therefore, the transmission member 6 and the rotating shaft 21 rotate in opposite directions, which is a preferred embodiment. Secondly, the rotation direction of the transmission member 6 is set to be opposite to the rotating shaft 21. When the hair enters the static knife 4, it is rotated in the opposite direction by the static knife 4, and the inclination angle of the hair can be adjusted to the angle opposite to the rotation direction of the movable knife 5 more quickly, which speeds up the hair trimming and improves the hair trimming performance.

[0039] Since the transmission member 6 needs to rotate in the opposite direction of the rotating shaft 21, in order to ensure the synchronous consistency of the transmission member 6 and the rotating shaft 21, a spline 22 is provided on the rotating shaft 21 and a main gear 7 is fixed at the spline 22. The main gear 7 rotates synchronously with the first speed of the rotating shaft 21; the transmission member 6 is connected to the main gear 7 and outputs kinetic energy at a second speed lower than the first speed of the rotating shaft 21 to drive the static knife 4 to rotate. Since the speed of the motor is generally above 3000 rpm, and the gear transmission has a high transmission efficiency and stability, it is a preferred implementation to set the main gear 7 on the rotating shaft 21. However, it can also be determined by a worm transmission and other structures, which can be determined according to actual needs. This embodiment only gives the best implementation. Of course, the main gear 7 cannot be installed with a spline 22. For example, a pin hole is set on the main gear 7 and the rotating shaft 21, and the main gear 7 is fixedly connected to the rotating shaft 21 by a pin to achieve the same purpose, but the spline 22 is easy to produce and process, so it is the preferred implementation of this embodiment.

[0040] In order to realize that the single-axis motor outputs two different speeds to drive the static knife 4 and the moving knife 5 to rotate in opposite directions and realize hair trimming, the transmission member 6 includes a transmission disc 61, a sub-gear 62 and a gear sleeve 63. The gear sleeve 63 is in a hollow ring shape and is provided with a plurality of transmission teeth 64 on its inner peripheral side wall. The transmission disc 61 is provided with at least one and is sleeved outside the rotating shaft 21 and is clearance-matched with the rotating shaft 21. With clearance-matching, the transmission disc 61 can rotate independently relative to the rotating shaft 21 to drive the static knife 4 to rotate in the opposite direction along the moving knife 5. The rotation of the transmission disc 61 depends on the sub-gear 62 installed on the transmission disc 61. Since the sub-gear 62 is meshed with the main gear 7 and the transmission teeth 64 in the gear sleeve 63 respectively, when the main gear 7 drives the sub-gear 62 to rotate, the sub-gear 62 will make a circular motion along the transmission teeth 64 on the inner side wall of the gear sleeve 63, so that the transmission disc 61 can rotate in the opposite direction relative to the rotating shaft 21, and the static knife 4 installed on the transmission disc 61 and the moving knife 5 installed on the rotating shaft 21 can be synchronously reversed. Of course, the gear sleeve 63 and the transmission teeth 64 may not be provided, and the sub-gear 62 and the transmission disc 61 only need to be set to be fixedly connected and non-rotatable, and the kinetic energy can be directly transferred to the sub-gear 62 by the main gear 7, so that the transmission disc 61 can also be independently rotated in the opposite direction relative to the rotating shaft 21 to form a dual-speed output. However, if the gear sleeve 63 and the transmission teeth 64 are not provided, the "reduction ratio" between the main gear 7 and the sub-gear 62 is small, so that the transmission disc 61 rotates too fast and cannot meet the requirements of the static knife 4 for capturing and introducing hair. Secondly, the running stability is poor, and the transmission disc 61 is prone to axial up and down movement and tooth jumping between the main gear 7 and the sub-gear 62. Therefore, in this embodiment, for the sake of running stability and reduction ratio, the gear sleeve 63 is added and the transmission teeth 64 are provided on the inner wall of the gear sleeve 63, and the number of transmission teeth 64 is used to maximize the reduction ratio, slowing down the second rotation speed of the transmission disc 61 to meet the requirements of the static knife 4 for hair introduction and capture.

[0041] In order to ensure the stability and reliability of the rotational motion of the transmission disc 61, three auxiliary gears 62 are provided, which are arranged in a planetary distribution outside the gear shaft 614 installed on the transmission disc 61. The auxiliary gears 62 are arranged in a planetary distribution, so that the power transmission between the main gear 7 and the transmission teeth 64 on the inner wall of the gear sleeve 63 can be more balanced, and the smoothness of the rotation of the transmission disc 61 can be ensured, thereby improving the working stability of the static knife 4 installed on the transmission disc 61. Of course, more auxiliary gears can be provided, but three auxiliary gears are sufficient to ensure that the transmission disc 61 can rotate more smoothly at the second speed, so the embodiment of this embodiment is a preferred embodiment.

[0042] In order to ensure the rotation stability of the transmission disk 61 to the greatest extent, one end of the gear sleeve 63 is connected and fixed to the outer shell of the driving mechanism 2. Since the sub-gear 62 installed on the transmission disk 61 makes a circular motion along the transmission teeth 64 in the gear sleeve 63 to drive the transmission disk 61 to rotate in the opposite direction along the rotating shaft 21, the stability of the gear sleeve 63 is directly related to the running stability of the transmission disk 61. In view of this, a detachable fixed connection is formed between one end of the gear sleeve 63 and the outer shell of the driving mechanism 2 (i.e., the motor), which can not only ensure the rotation stability of the transmission disk 61, but also ensure the hair trimming performance of the hair trimmer; at the same time, it can also facilitate the production and assembly of the gear sleeve 63, thereby improving the production and assembly efficiency. The other end of the gear sleeve 63 is used to rotatably restrict the transmission disc 61 in the gear sleeve 63, so that one end face of the transmission disc 61 is placed outside the gear sleeve 63 for connection and fixation with the static knife 4. When the secondary gear 62 drives the transmission disc 61 to rotate, the end of the gear sleeve 63 can play a limiting role to prevent the transmission disc 61 from axial movement, thereby ensuring that the secondary gear 62 and the main gear 7 and the transmission tooth 64 are always in meshing state, avoiding tooth jumping between gears, and ensuring the hair trimming performance of the hair trimmer.

[0043] Since the rated speed of the motors used in existing personal care products such as electric rotary shavers or nose hair removers is at least 3000 rpm, and the speed of the static blade 4 in electric rotary shavers or nose hair removers cannot be too fast, the second speed of the transmission disc 61 must be decelerated to adapt to the introduction and capture of hair by the static blade 4. In order to achieve the deceleration of the transmission disc 61, the transmission disc 61 includes a first reduction disc 611, a second reduction disc 612 and a third reduction disc 613 stacked and sleeved along the rotating shaft 21 and having a clearance fit with the rotating shaft 21. The first reduction disc 611 can be rotatably matched with the gear sleeve 63 and its end face is placed outside the gear sleeve 63 to connect and fix the static blade 4; secondary gears 8 are respectively provided on the upper end faces of the second reduction disc 612 and the third reduction disc 613; a plurality of gear shafts 614 in a planetary distribution are respectively provided on the lower end faces of each reduction disc, and a sub-gear 62 is respectively installed outside each gear shaft 614, which is installed on the first reduction disc 61. The auxiliary gear 62 on the lower end surface of the first reduction plate 611 meshes with the secondary gear 8 on the upper end surface of the second reduction plate 612 and the transmission gear 64 on the gear sleeve 63 respectively; the auxiliary gear 62 installed on the lower end surface of the second reduction plate 612 meshes with the secondary gear 8 of the third reduction plate 613 and the transmission gear 64 on the gear sleeve 63; the auxiliary gear 62 installed on the lower end surface of the third reduction plate 613 meshes with the main gear 7 outside the rotating shaft 21 and the transmission gear 64 on the gear sleeve 63, so that the second speed of the first reduction plate 611 is lower than the first speed of the rotating shaft 21, and the first reduction plate 611 rotates in opposite directions to the rotating shaft 21. By setting the transmission disc 61 to be a first deceleration disc 611, a second deceleration disc 612 and a third deceleration disc 613 of three-stage deceleration, the first speed of the rotating shaft 21 can be decelerated to a suitable second speed without occupying a large amount of space to drive the first deceleration disc 611 to rotate, so that the static knife 4 rotates at a low speed to adapt to the hairs with different growth directions entering the static knife 4, thereby improving the hair introduction efficiency and trimming efficiency of the static knife 4. Of course, it can also be set as a two-stage deceleration structure, such as only setting the first deceleration disc 611 and the second deceleration disc 612, or setting more deceleration discs to achieve more stages of deceleration, which can be determined according to actual needs and is not further limited in this embodiment.

[0044] In the actual assembly process, whether it is the first reduction disc 611, the second reduction disc 612 or the third reduction disc 613, the auxiliary gear 62 installed at the bottom end surface thereof is meshed with the main gear 7 or the secondary gear 8 and the transmission teeth 64 on the inner wall of the gear sleeve 63, so that the corresponding first reduction disc 611, the second reduction disc 612 and the third reduction disc 613 are in a stacked state and keep a coaxial clearance fit with the rotating shaft 21. Secondly, the first reduction disc 611, the second reduction disc 612, the third reduction disc 613, the auxiliary gear 62, the secondary gear 8 and the main gear 7 are all in end face contact. Therefore, under normal circumstances, the first reduction disc 611, the second reduction disc 612 and the third reduction disc 613 will not interfere with each other, and the multi-stage deceleration is realized to ensure that the first reduction disc 611 can output power steadily at a second speed lower than the first speed of the rotating shaft 21 to drive the static knife to rotate in the opposite direction relative to the moving knife. Since the third reduction disc 613 and the second reduction disc 612 have the same structure, their structures are not repeatedly displayed in the drawings of the specification.

[0045] Since the transmission teeth 64 are arranged on the inner side wall of the gear sleeve 63, in order to facilitate the production, processing and assembly of the transmission teeth 64, the gear sleeve 63 is detachably connected and fixed to the base 65, and the base 65 is placed on the end surface of one end of the rotating shaft 21 of the driving mechanism 2 and is fixedly connected to the housing of the driving mechanism 2. By detachably connecting and fixing the gear sleeve 63 and the base 65, at least one end of the gear sleeve 63 can be set to an open shape, so that it is convenient to process the inner side wall of the gear sleeve 63 to form the transmission teeth 64.

[0046] In order to facilitate the quick assembly and disassembly of the gear sleeve 63 and the base 65, two hook rings 631 and positioning holes 632 are arranged on the outer peripheral side wall of the gear sleeve 63, and corresponding positions of the base 65 are provided with barbed pins 651 and positioning inserts 652, respectively. Each pin 651 and positioning insert 652 can be inserted into the hook ring 631 and the positioning hole 632 respectively to detachably connect and fix the gear sleeve 63 and the base 65. By providing the hook ring 631 and the corresponding pin 651, the pin 651 can be directly inserted into the hook ring 631 during assembly, which can greatly improve the assembly efficiency of the gear.

[0047] Since the base 65 is fixed on the housing of the driving mechanism 2 with the rotating shaft 21 as a reference, in order to ensure the coaxiality of the gear sleeve 63 and the rotating shaft 21, when assembling the gear sleeve 63, the coaxiality of the gear sleeve 63 and the rotating shaft 21 can be effectively ensured by inserting the positioning plug 652 arranged on the base 65 into the positioning hole 632 in the gear sleeve 63, thereby reducing the assembly error and improving the running stability of the hair trimmer. Of course, there are many structures for achieving positioning, such as the cooperation of the pin and the pin hole, but the use of the positioning hole 632 and the positioning plug 652 structure is not only convenient for production costs, but also can effectively improve the radial force strength of the gear sleeve 63 and the base 65, and prevent the gear sleeve 63 and the base 65 from being misaligned due to unexpected factors such as bumps and collisions, thereby affecting the reliability of the hair trimmer.

[0048] Since the static blade 4 is connected to the first reduction disc 611, and the second speed of the first reduction disc 611 rotates synchronously with the first speed of the rotating shaft 21, in order to prevent the first reduction disc 611 from being separated from the gear sleeve 63 and affecting the working stability of the first reduction disc 611, a limiting ring 633 is provided at the port of the gear sleeve 63, and the inner diameter of the limiting ring 633 is larger than the outer diameter of the first reduction disc 611, so that the first reduction disc 611 can be rotatably placed in the gear sleeve 63. The limiting ring 633 can not only limit the first reduction disc 611 to be rotatable in the gear sleeve 63, thereby ensuring the rotation stability of the first reduction disc 611, but also the limiting ring 633 can also press and limit the first reduction disc 611, indirectly preventing the second reduction disc 612 and the third reduction disc 613 from axial movement, thereby ensuring the working stability of each reduction disc in the multi-stage reduction, thereby ensuring the hair trimming performance of the trimmer.

[0049] During use, the stationary knife 4 rotates synchronously in the opposite direction along the rotating shaft 21 with the first deceleration plate 611. In order to ensure the coaxiality of the rotation of the stationary knife 4 and the movable knife 5 and improve the hair trimming performance, a limiting boss 6111 is provided on the upper end surface of the first deceleration plate 611, and at least two limiting grooves 6112 are provided at relative positions on the limiting boss 6111. The adapter seat 9 is sleeved outside the limiting boss 6111 and is clamped into the adapter seat 9 by using the limiting block 91 provided in the adapter seat 9. The adapter 9 and the first speed reduction plate 611 are detachably connected and fixed in the limiting groove 6112; by setting the limiting boss 6111 and making the limiting boss 6111 protrude from the upper end surface of the gear sleeve 63, the upper end surface of the gear sleeve 63 will not interfere during assembly, and the protruding limiting boss 6111 can also limit the adapter 9, ensuring the coaxiality of the adapter 9 and the rotating shaft 21, and correspondingly ensuring the coaxiality of the static knife 4 and the moving knife 5. In order to facilitate the assembly of the static knife 4, an annular plug-in ring 92 is provided at the center of the adapter 9, and the plug-in ring 92 passes through the body 1 and is placed outside the body 1 for installing the static knife 4, and the rotating shaft 21 passes through the plug-in ring 92 to connect with the moving knife 5. By using the plug-in ring 92 passing through the outside of the body 1, when installing the static knife 4, the static knife seat 41 can be directly connected to the plug-in ring 92, which is convenient for the assembly and disassembly of the static knife 4, and can also be used for multiple purposes. For example, when it is necessary to trim the hair in the nasal cavity, the blade head assembly for trimming the nose hair is replaced on the outside of the plug-in ring 92 (the blade head assembly includes a movable blade 5 for trimming the nose hair installed on the rotating shaft 21 and a static knife 4 for trimming the nose hair installed on the outside of the plug-in ring 92). At this time, it can be used for trimming the hair in the nasal cavity. When it is necessary to trim the beard, the blade head assembly for trimming and shaving can be replaced on the outside of the rotating shaft 21 and the plug-in ring 92 accordingly.

[0050] To facilitate the assembly of the static knife 4, the static knife 4 is mounted on the static knife seat 41. The inner diameter of the static knife seat 41 matches the outer diameter of the plug-in ring 92 and is sleeved outside the plug-in ring 92. A locking block 42 is provided on the inner side wall of the static knife seat 41, and a rotation locking groove 93 is provided on the outer side wall of the plug-in ring 92. When the static knife seat 41 is sleeved outside the plug-in ring 92, the static knife seat 41 is rotated by a certain angle, and the locking block 42 can be rotated to the inside of the rotation locking groove 93, so that the static knife seat 41 and the plug-in ring 92 form a rigid fixed connection. When the cutter head assembly needs to be disassembled or replaced, the static knife seat 41 only needs to be rotated in the opposite direction to disengage the locking block 42 from the rotation locking groove 93, thereby realizing a detachable fixed connection between the static knife seat 41 and the plug-in ring 92. Since the stationary knife seat 41 needs to rotate at the second speed following the first reduction plate 611, a gap is set between the bottom end surface of the stationary knife seat 41 and the upper end surface of the machine body 1 to avoid increasing the rotation resistance of the first reduction plate 611 due to contact between the stationary knife seat 41 and the machine body 1.

[0051] The above embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A uniaxial bidirectionally rotating hair trimmer, comprising a body (1) and a cutter head assembly mounted on the body (1), wherein a driving mechanism (2) is mounted in the body (1), the cutter head assembly comprises a stationary cutter (4) and a movable cutter (5), the movable cutter (5) being connected to a rotating shaft (21) of the driving mechanism (2) and being capable of rotating along the stationary cutter (4) for cutting when driven by a first rotation speed of the rotating shaft (21); characterized in that A transmission member (6) with a coaxial clearance fit is provided outside the rotating shaft (21), and the stationary knife (4) is mounted on the transmission member (6); the transmission member (6) is linked to the rotating shaft (21) and synchronously follows the rotation of the rotating shaft (21) at a second speed to output kinetic energy to drive the stationary knife (4) to rotate synchronously with the moving knife (5), and the second speed of the transmission member (6) is lower than the first speed of the rotating shaft (21).

2. The uniaxial bidirectional rotating hair trimmer according to claim 1, characterized in that The second rotational speed direction of the transmission member (6) is the same as or opposite to the first rotational speed direction of the rotating shaft (21).

3. The uniaxial bidirectional rotating hair trimmer according to claim 1, characterized in that A spline (22) is provided on the rotating shaft (21) and a main gear (7) is fixed at the spline (22). The main gear (7) rotates synchronously with a first rotation speed of the rotating shaft (21). The transmission member (6) is in transmission connection with the main gear (7) and outputs kinetic energy at a second rotation speed lower than the first rotation speed of the rotating shaft (21) to drive the stationary blade (4) to rotate.

4. The uniaxial bidirectional rotating hair trimmer according to claim 1, characterized in that The transmission member (6) comprises a transmission disc (61), a sub-gear (62) and a gear sleeve (63); the gear sleeve (63) is in a hollow ring shape and is provided with a plurality of transmission teeth (64) on its inner peripheral side wall; the transmission disc (61) is provided with at least one and is sleeved outside the rotating shaft (21) and is clearance-matched with the rotating shaft (21); the sub-gear (62) is mounted on the transmission disc (61) and is meshed with the transmission teeth (64) and the main gear (7) respectively; one end of the gear sleeve (63) is connected and fixed to the housing of the driving mechanism (2); the other end of the gear sleeve (63) rotatably limits the transmission disc (61) in the gear sleeve (63), so that one end surface of the transmission disc (61) is placed outside the gear sleeve (63) for connection and fixing with the stationary blade (4).

5. The uniaxial bidirectional rotating hair trimmer according to claim 4, characterized in that The transmission plate (61) comprises a first reduction plate (611), a second reduction plate (612) and a third reduction plate (613) which are stacked and sleeved along the rotating shaft (21) and are clearance-matched with the rotating shaft (21); the first reduction plate (611) is rotatably matched with the gear sleeve (63) and its end face is arranged outside the gear sleeve (63) to be connected and fixed with the stationary blade (4); secondary gears (8) are respectively arranged on the upper end faces of the second reduction plate (612) and the third reduction plate (613); a plurality of gear shafts (614) distributed in a planetary manner are respectively arranged on the lower end faces of each reduction plate, and a sub-gear (62) is respectively installed outside each gear shaft (614); the sub-gear (62) installed on the lower end face of the first reduction plate (611) is arranged on the lower end face of the second reduction plate (612). 2) are respectively meshed with the secondary gear (8) on the upper end surface of the second reduction plate (612) and the transmission teeth (64) on the gear sleeve (63); the secondary gear (62) installed on the lower end surface of the second reduction plate (612) is meshed with the secondary gear (8) of the third reduction plate (613) and the transmission teeth (64) on the gear sleeve (63); the secondary gear (62) installed on the lower end surface of the third reduction plate (613) is meshed with the main gear (7) outside the rotating shaft (21) and the transmission teeth (64) on the gear sleeve (63), so that the second rotation speed of the first reduction plate (611) is lower than the first rotation speed of the rotating shaft (21), and the first reduction plate (611) and the rotating shaft (21) rotate in opposite directions.

6. The uniaxial bidirectional rotating hair trimmer according to claim 4, characterized in that The gear sleeve (63) is detachably connected and fixed to the base (65); the base (65) is placed on an end surface of the driving mechanism (2) on which the rotating shaft (21) is arranged and is fixedly connected to the driving mechanism (2).

7. The uniaxial bidirectional rotating hair trimmer according to claim 6, characterized in that Two hook rings (631) and positioning holes (632) are arranged on the outer peripheral side wall of the gear sleeve (63) in opposite directions, and corresponding positions of the base (65) are provided with barbed pins (651) and positioning inserts (652), respectively. Each pin (651) and positioning insert (652) can be inserted into the hook ring (631) and the positioning hole (632) respectively to detachably connect and fix the gear sleeve (63) and the base (65).

8. The uniaxial bidirectional rotating hair trimmer according to claim 5, characterized in that A limiting ring (633) is provided at the port of the gear sleeve (63), and the inner diameter of the limiting ring (633) is larger than the outer diameter of the first reduction plate (611), so that the first reduction plate (611) can be rotatably placed in the gear sleeve (63).

9. The uniaxial bidirectional rotating hair trimmer according to claim 5, characterized in that A limiting boss (6111) is provided on the upper end surface of the first speed reduction disc (611), and a limiting groove (6112) is provided at a relative position on the limiting boss (6111); the adapter seat (9) is sleeved outside the limiting boss (6111) and a limiting block (91) provided on the adapter seat (9) is snapped into the limiting groove (6112) so that the adapter seat (9) and the first speed reduction disc (611) are detachably snap-fitted and fixed; an annular plug-in ring (92) is provided at the center of the adapter seat (9), the plug-in ring (92) passes through the machine body (1) and is placed outside the machine body (1) for installing a stationary knife (4), and the rotating shaft (21) passes through the plug-in ring (92) and is connected to the movable knife (5).

10. The uniaxial bidirectional rotating hair trimmer according to claim 9, characterized in that The stationary knife (4) is mounted on the stationary knife seat (41); the inner diameter of the stationary knife seat (41) matches the outer diameter of the plug-in ring (92) and is sleeved outside the plug-in ring (92) and is detachably connected and fixed to the plug-in ring (92); and the bottom end surface of the stationary knife seat (41) is spaced apart from the upper end surface of the machine body (1).

Images