CN117301126A

CN117301126A - Self-fastening hair trimming cutter head

Info

Publication number: CN117301126A
Application number: CN202311307631.3A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: ZHEJIANG HAISHUN ELECTRICAL CO Ltd
Current assignee: ZHEJIANG HAISHUN ELECTRICAL CO Ltd
Priority date: 2023-10-10
Filing date: 2023-10-10
Publication date: 2023-12-29

Abstract

The invention relates to a self-buckling hair trimming cutter head, which is characterized by further comprising an elastic buckle piece and at least two clamping feet, wherein the elastic buckle piece at least comprises an elastic buckle piece and at least two clamping feet, the clamping feet are respectively connected with a static cutter, so that the elastic buckle piece is buckled on a movable cutter to keep the end face of the movable cutter to be attached to the end face of the static cutter all the time, and the movable cutter can swing back and forth along the end face of the static cutter under the action of external force, so that cutting teeth arranged in the static cutter and the movable cutter are mutually matched to cut hair. The hair clipping machine has the beneficial effects that the clip legs and the elastic clipping pieces of the elastic clipping machine are respectively clipped on the outer surfaces of the static knife and the movable knife which deviate from each other to form self-clipping, so that the static knife and the static knife are prevented from being separated, the end surfaces of the static knife and the movable knife can be ensured to be always attached, and the phenomenon of jumping the knife in the hair clipping process is avoided. And secondly, the double torsion springs are changed into elastic fasteners, so that the double torsion springs are not limited by the size of the static knife or the moving knife, and can be correspondingly reduced or enlarged according to the size change of the static knife or the moving knife, and the assembly and use requirements of the trimming knife head are met.

Description

Self-fastening hair trimming cutter head

Technical Field

The invention relates to a device for cutting hair, in particular to a self-buckling hair cutting head which is mainly applied to the field of hair cutting tools.

Background

The reciprocating trimming cutter head mainly comprises a static cutter and a movable cutter, wherein the movable cutter is attached to the end face of the static cutter, the movable cutter seat is connected with the movable cutter and driven by a driving mechanism to enable the movable cutter to swing reciprocally along the end face of the static cutter, so that trimming of hair is realized, and the reciprocating trimming cutter head is a main component of a shaver, a sideburns cutter, a eyebrow trimming cutter, a shaver or a hair trimming cutter.

In order to ensure the hair trimming effect, the movable cutter of the existing trimming cutter head basically depends on the torsion arm of the double torsion spring to be buckled on the movable cutter or the movable cutter seat so as to ensure that the movable cutter is always attached to the end face of the static cutter. However, in order to facilitate the installation and fixation of the double torsion springs, the trimming cutter head is required to be large enough to meet the use requirement of the trimming cutter head, but the trimming cutter head cannot be applied to the eyebrow trimming cutter, the temple cutter or the back cutter in the shaver with smaller size requirement. Although the mounting requirement can be met by reducing the size of the double torsion spring, after the size of the double torsion spring is reduced, the torsion arm buckling pressure of the double torsion spring can be correspondingly reduced, the moving cutter can jump in the use process, the phenomenon that the trimming cutter head is pulled or pulled is caused, and the use comfort of the trimming cutter head is reduced.

Disclosure of Invention

In order to solve the above technical problems; the self-buckling hair trimming cutter head provided by the invention can always keep the end surface fit between the movable cutter and the static cutter without a double torsion spring, so that the cutter jumping phenomenon can be prevented, the generation of napping or hair pulling is avoided, and the use comfort of the trimming cutter head is improved. Meanwhile, the size of the back knife can be reduced, and the back knife can be applied to the back knife in the eyebrow trimming knife, the temple knife or the shaver with smaller size, thereby meeting the mounting and use requirements of the back knife in the eyebrow trimming knife, the temple knife or the shaver.

In order to solve the technical problems, the technical scheme adopted by the invention is that the self-buckling hair trimming cutter head comprises a static cutter and a movable cutter, and is also provided with an elastic buckle piece, wherein the elastic buckle piece at least comprises an elastic buckle piece and at least two clamping feet, the clamping feet are respectively connected with the static cutter to enable the elastic buckle piece to buckle on the movable cutter to keep the end face of the movable cutter to be attached to the end face of the static cutter all the time, and the movable cutter can swing back and forth along the end face of the static cutter under the action of external force, so that cutting teeth arranged in the static cutter and the movable cutter are mutually matched to cut hair.

Preferably, the elastic fastener comprises a body, the clamping legs are provided with two ends which are respectively connected with the body into a whole, and the elastic buckle piece is provided with two pieces which are oppositely arranged at two ends of the body and are in an integral structure with the body.

Preferably, a through hole is arranged in the center of the static knife, a through swing hole is arranged on the movable knife, the size of the swing hole is larger than that of the through hole, and the width of the swing hole is larger than the reciprocating swing distance of the movable knife; the clamping feet respectively pass through the swing holes and the through holes and are hooked and connected with the outer surface of the static knife; the elastic buckling pieces are respectively buckled on the outer surfaces of the movable cutters, so that the end surfaces of the static cutters and the movable cutters are always attached.

Preferably, a guide mechanism is arranged between the static knife and the movable knife, and the movable knife can only swing back and forth along the length direction of the static knife under the limit of the guide mechanism.

Preferably, a sliding groove is arranged on the movable knife, and one end of the elastic buckling piece, which is buckled on the movable knife, is arranged in the sliding groove, so that the end face of the movable knife is always attached to the end face of the static knife.

Preferably, a rolling piece is arranged between the elastic buckling piece and the movable knife, and the elastic buckling piece is buckled on the rolling piece and is contacted with the rolling piece, so that the end face of the movable knife is always attached to the end face of the static knife.

Preferably, the contact part of the elastic buckling piece and the rolling piece is provided with an arc-shaped groove matched with the outer diameter of the rolling piece, the rolling piece is a ball or a needle roller, and the ball or the needle roller is partially arranged in the arc-shaped groove.

Preferably, the movable knife comprises a movable knife blade and a movable knife blade, the movable knife blade and the movable knife blade are synchronously linked, the swinging holes respectively penetrate through the movable knife blade and the movable knife blade, the clamping feet penetrate through the swinging holes in the movable knife blade and the through holes in the static knife blade to be connected with the outer surface of the static knife in a hooking manner, the elastic buckling piece is buckled on the movable knife blade to enable the movable knife blade and the end surface of the static knife blade to be always attached, and the movable knife blade can be driven to swing back and forth along the end surface of the static knife blade under the action of external force, so that the cutting teeth arranged on the movable knife blade and the cutting teeth arranged on the static knife blade are mutually matched to cut off hairs.

Preferably, the guide mechanism comprises at least one guide upright post arranged on the movable cutter seat, and a linkage hole and a guide hole which are arranged at the corresponding positions of the movable cutter and the static cutter, wherein the shape of the linkage hole is matched with that of the guide upright post, one end of the guide upright post penetrates through the linkage hole to enable the movable cutter to be synchronously linked with the movable cutter seat, and the end part of the guide upright post is inserted into the guide hole.

Preferably, the sliding groove is arranged on the outer surface of the movable cutter seat, a rolling groove is arranged at the bottom of the sliding groove, and the rolling piece is arranged in the rolling groove, and is partially arranged in the sliding groove and is attached to the arc-shaped groove on the elastic buckle piece.

The hair trimming device has the beneficial effects that the clamping legs and the elastic buckling pieces of the elastic buckle are respectively buckled on the outer surfaces of the static knife and the movable knife, which are away from each other, to form self-buckling, so that the static knife and the static knife are prevented from being separated, the end surfaces of the static knife and the movable knife are ensured to be always attached, the phenomenon of jumping the knife in the hair trimming process is avoided, and the working stability and the hair trimming performance of the trimming knife head are improved. And secondly, the double torsion springs are changed into elastic fasteners, so that the double torsion springs are not limited by the size of the static knife or the moving knife, and can be correspondingly reduced or enlarged according to the size change of the static knife or the moving knife, thereby meeting the assembly and use requirements of the trimming knife head.

Drawings

Fig. 1 is a perspective view showing a self-fastening hair-trimming cutter head according to an embodiment of the present invention

FIG. 2 is a cross-sectional view of a self-fastening hair-trimming blade according to the embodiment of the present invention

Fig. 3 is an exploded view of a self-fastening hair-trimming blade according to an embodiment of the present invention

FIG. 4 is a perspective view showing a self-fastening hair trimming blade with balls according to the embodiment of the present invention

FIG. 5 is a cross-sectional view showing a structure of a self-fastening hair trimming blade with balls according to the embodiment of the present invention

FIG. 6 is a top view of a movable blade in an embodiment of the invention

FIG. 7 is a bottom view of a movable blade in an embodiment of the invention

FIG. 8 is an exploded view of a self-fastening hair trimmer head incorporating balls according to an embodiment of the present invention

FIG. 9 is a second embodiment of a rolling groove in a movable blade according to an embodiment of the invention

FIG. 10 is a sectional assembly view of a second embodiment of a rolling groove in an embodiment of the invention

FIG. 11 is a perspective view showing a self-fastening hair trimmer head with needle roller

FIG. 12 is a cross-sectional view of a self-fastening hair trimmer head with needle roller

FIG. 13 is an exploded view of a self-fastening hair trimmer head incorporating a needle in accordance with an embodiment of the present invention

Detailed Description

Embodiments of the present invention are further described below with reference to fig. 1-13:

the existing trimming cutter head applied to the eyebrow trimming cutter and the temple cutter is small in size relative to the trimming cutter head of the hair trimming cutter or the shaver, if the trimming cutter head of the hair trimming cutter or the shaver is adopted, the movable cutter 2 is driven to be attached to the end face of the static cutter 1 through the double torsion springs, the size of the double torsion springs is limited by the size, the sizes of the double torsion springs are required to be correspondingly reduced, the twisting arm buckling pressure of the double torsion springs is insufficient, the phenomenon that the trimming cutter head is easy to jump in the hair trimming process is caused, and the hair trimming performance of the trimming cutter head is affected. Therefore, the invention provides a self-buckling hair trimming cutter head, which comprises a static cutter 1, a movable cutter 2 and an elastic fastener 3, wherein the elastic fastener 3 at least comprises an elastic buckling piece 31 with elasticity and at least two clamping feet 32, and the clamping feet 32 are respectively connected with the static cutter 1 to enable the elastic buckling piece 31 to be buckled on the movable cutter 2 so as to keep the end face of the movable cutter 2 to be always adhered to the end face of the static cutter 1. The clamping feet 32 and the elastic buckling pieces 31 of the elastic buckling pieces 3 are respectively buckled on the outer surfaces of the static knife 1 and the movable knife 2, which are away from each other, to form self-buckling, so that the static knife 1 and the movable knife 2 can be always kept attached to each other while the movable knife 2 is prevented from being separated from the static knife 1, the phenomenon of jumping in the hair trimming process is avoided, and the working stability and the hair trimming performance of the trimming knife head are improved. Secondly, the double torsion springs are changed into the elastic fastener 3, so that the double torsion springs are not limited by the size of the static knife 1 or the movable knife 2, and can be correspondingly reduced or enlarged according to the size change of the static knife 1 or the movable knife 2, and the assembly and use requirements of the trimming knife head are met. In order to facilitate hair trimming, the movable cutter 2 is linked with an output shaft of a motor arranged in the machine body, and after the motor is started, the output shaft of the movable cutter can drive the movable cutter 2 to swing back and forth along the end face of the static cutter 1, and cutting teeth arranged on the static cutter 1 and the movable cutter 2 can be mutually matched to cut off hair. In the actual production process, in order to reduce the friction resistance between the movable cutter 2 and the static cutter 1 and reduce the temperature rise of the trimming cutter head, the movable cutter 2 and the static cutter 1 are respectively bent and formed, an air flow channel is formed between the movable cutter 2 and the static cutter 1, the contact area between the movable cutter 2 and the static cutter 1 is reduced, the friction resistance is reduced, the temperature rise is reduced, and meanwhile, the heat dissipation of the outside air entering the air flow channel is accelerated.

In order to facilitate the elastic fastener 3 to drive the end faces of the movable knife 2 and the static knife 1 to be attached to form a self-buckling, the elastic fastener 3 comprises a body 33, two clamping legs 32 are arranged, one ends of the clamping legs 32 are respectively connected with the body 33 into a whole, and two elastic buckling pieces 31 are arranged at two ends of the body 33 oppositely and are integrally structured with the body 33. Two clamping feet 32 are arranged, and when the device is assembled, the two clamping feet 32 can be used for hooking and connecting with the static knife 1, and the hooking and connecting positions can be the edges of the two sides of the static knife 1 or the edges of the two ends of the static knife 1. Of course, the clip leg 32 and the stationary blade 1 may be welded and fixed by welding, but the clip leg is easily assembled by hooking, so that the embodiment of this example is a preferable embodiment. After the clamping foot 32 is hooked and connected with the static knife 1, two elastic buckling pieces 31 arranged at two ends of the body 33 are buckled and pressed on the movable knife 2, and the elastic force of the elastic buckling pieces 31 can be utilized to ensure that the end surfaces of the movable knife 2 and the static knife 1 are always attached; simultaneously, the clamping foot 32 can enable the static knife 1 and the movable knife 2 to form self-buckling under the cooperation of the elastic buckling piece 31, so that the movable knife 2 and the static knife 1 are prevented from being separated to form a whole, and the whole assembly and the disassembly are convenient.

Because a plurality of cutting teeth are arranged at the front end of the static cutter 1, in order to prevent the clamping feet 32 from interfering with the hair trimming performance of the cutting teeth, a through hole 11 is arranged in the middle of the static cutter 1, a through swing hole 211 is arranged on the movable cutter 2, the size of the swing hole 211 is larger than the through hole 11, and the width of the swing hole is larger than the reciprocating swing distance of the movable cutter 2; the clamping feet 32 respectively pass through the swing holes 211 and the through holes 11 to be hooked and connected with the outer surface of the static knife 1; the elastic buckling pieces 31 are respectively buckled on the outer surfaces of the movable blades 2, so that the end surfaces of the static blades 1 and the movable blades 2 are always attached. Through set up through-hole 11 on quiet sword 1, card foot 32 pass through-hole 11 again and quiet sword 1 surface hook is connected, just so can avoid the cutting tooth on the quiet sword 1, when guaranteeing to move sword 2 and quiet sword 1 terminal surface laminating formation from detaining, can also avoid card foot 32 to cut the interference of tooth. The width of the swing hole 211 on the movable cutter 2 is larger than that of the through hole 11, when the movable cutter 2 swings back and forth under the drive of the motor output shaft, the two sides of the swing hole 211 cannot contact the clamping feet 32 of the elastic fastener 3, and the working stability of the trimming cutter head is improved.

In the above embodiment, the stationary blade 1 and the movable blade 2 are self-fastening depending on the elastic fastening member 3, and the elastic fastening member 3 has no limit function although preventing the stop blade 2 from being separated from the stationary blade 1. For example, when the movable blade 2 is driven by an external force to reciprocate along the stationary blade 1, there may be a phenomenon of swing deviation or dislocation, thereby affecting the hair-cutting performance of the cutting head. For this purpose, a guide mechanism 4 is provided between the stationary blade 1 and the movable blade 2, and the movable blade 2 can be reciprocated only in the longitudinal direction of the stationary blade 1 under the restriction of the guide mechanism 4. By utilizing the guide mechanism 4, when the movable cutter 2 swings back and forth along the end face of the static cutter 1 under the drive of external force, the guide mechanism 4 can effectively prevent the deviation or dislocation of the stop cutter 2 relative to the static cutter 1, and the hair trimming performance and trimming benefit of the trimming cutter head are improved.

In the hair trimming process, the movable blade 2 needs to swing reciprocally along the end face of the static blade 1 under the action of external force, the elastic buckle piece 31 is buckled on the outer surface of the movable blade 2, in order to prevent the elastic buckle piece 31 from displacing or deflecting to cause the clamping leg 32 of the elastic buckle piece 3 to be released from the static blade 1 when the movable blade 2 swings reciprocally under the action of external force, the movable blade 2 is provided with the sliding groove 212, one end of the elastic buckle piece 31 buckled on the movable blade 2 is arranged in the sliding groove 212 to enable the end face of the movable blade 2 to be always attached to the end face of the static blade 1, the elastic buckle piece 31 can be limited through the sliding groove 212, the elastic buckle piece 31 can be effectively prevented from deflecting along the swinging direction of the movable blade 2, the installation firmness of the elastic buckle piece 3 is ensured, the working stability of the trimming blade is improved, and the hair trimming performance is ensured.

In the above embodiment, the movable blade 2 is pressed by the elastic buckle piece 31 to keep fit with the end face of the stationary blade 1, and when the movable blade 2 swings along the end face of the stationary blade 1 under the driving of the external force, the elastic buckle piece 31 is also relatively moving along the outer surface of the movable blade 2. In order to reduce the friction resistance between the elastic buckling piece 31 and the outer surface of the movable cutter 2 when the movable cutter 2 swings, a rolling piece 5 is arranged between the elastic buckling piece 31 and the movable cutter 2, and the elastic buckling piece 31 is buckled and pressed on the rolling piece 5 to be contacted with the rolling piece 5, so that the rolling piece 5 is propped against the movable cutter 2 again to keep the end face of the movable cutter 2 and the end face of the static cutter 1 to be always attached. The rolling piece 5 is added, the elastic buckling piece 31 can be used for buckling the movable cutter 2 by the rolling piece 5 so that the end face of the movable cutter 2 and the end face of the static cutter 1 are always kept in fit, and when the movable cutter 2 swings back and forth along the static cutter 1, the rolling piece 5 correspondingly rolls under buckling of the elastic buckling piece 31, so that friction resistance between the elastic buckling piece 31 and the movable cutter 2 can be effectively reduced, hair trimming performance is guaranteed, meanwhile, temperature rise between the movable cutter 2 and the static cutter 1 can be reduced, and use comfort of a trimming cutter head is improved. Secondly, the driving kinetic energy required by the movable knife 2 in the swinging process can be reduced, and the service life of the battery are prolonged.

In order to prevent the rolling element 5 from separating from the elastic buckle piece 31 when rolling along with the reciprocating swing of the movable knife 2, an arc-shaped groove 311 matched with the outer diameter of the rolling element 5 is arranged at the contact position of the elastic buckle piece 31 and the rolling element 5, and the rolling element 5 is a ball or a needle roller, and the ball or the needle roller is partially arranged in the arc-shaped groove 311. The arc-shaped groove 311 with the cross section matched with the outer diameter of the ball or the rolling pin is arranged on the elastic buckling piece 31, when the elastic buckling piece 31 is buckled on the outer surface of the ball or the rolling pin, the ball or the rolling pin can be used for propping against the movable knife 2, so that the end face of the movable knife 2 is always attached to the end face of the static knife 1, and the hair trimming performance of the trimming knife head is ensured; meanwhile, the rolling of the rolling balls or the rolling pins can be limited by the arc-shaped grooves 311, so that the rolling balls or the rolling pins are effectively prevented from being separated from the elastic buckling pieces 31, and the hair trimming performance and the working stability of the trimming cutter head are ensured.

In order to drive the movable cutter 2 to swing reciprocally along the static cutter 1 to achieve hair trimming performance, the movable cutter 2 comprises a movable cutter blade 21 and a movable cutter blade 22, the movable cutter blade 21 and the movable cutter blade 22 are synchronously linked, a driving groove 221 is formed in the movable cutter blade 22, and an output shaft of a motor is arranged in the driving groove 221 to drive the movable cutter blade 22 to swing reciprocally. The movable blade 21 and the movable blade holder 22 are synchronously linked, so that the movable blade 21 can synchronously swing back and forth along the end face of the static blade 1 under the drive of the movable blade holder 22 to realize the hair trimming performance. In order to avoid the interference of the installation of the elastic fastener 3 on the cutting teeth of the static knife 1 and the dynamic knife 2 in cutting hair, the swing hole 211 penetrates through the dynamic knife holder 22 and the dynamic knife 21 respectively, the clamping foot 32 penetrates through the swing hole 211 on the dynamic knife holder 22 and the dynamic knife 21 and the through hole 11 in the static knife 1 to be hooked and connected with the outer surface of the static knife 1, the elastic buckle piece 31 is buckled on the dynamic knife holder 22 to enable the dynamic knife 21 to keep fit with the end surface of the static knife 1 all the time, and the dynamic knife holder 22 can drive the dynamic knife 21 to swing back and forth along the end surface of the static knife 1 under the action of external force, so that the cutting teeth arranged on the dynamic knife 21 and the cutting teeth on the static knife 1 are mutually matched to cut off the hair.

When the movable cutter holder 22 drives the movable cutter 21 to swing reciprocally along the static cutter 1, in order to avoid dislocation or deviation between the movable cutter 2 and the static cutter 1 and influence the hair trimming performance of the cutting teeth, the guide mechanism 4 comprises at least one guide upright 41 arranged on the movable cutter holder 22, and a linkage hole 42 and a guide hole 43 arranged at corresponding positions of the movable cutter 2 and the static cutter 1, wherein the shape of the linkage hole 42 is matched with that of the guide upright 41, one end of the guide upright 41 passes through the linkage hole 42 to enable the movable cutter 21 to be synchronously linked with the movable cutter holder 22, and the end part of the guide upright 41 is inserted into the guide hole 43. The movable blade holder 22 is provided with a guide upright 41, and the movable blade 21 is provided with a linkage hole 42, and when the movable blade 21 is assembled, the movable blade 21 and the movable blade holder 22 can be synchronously linked by the guide upright 41 penetrating through the linkage hole 42. When the guide upright post 41 is inserted into the guide hole 43 on the static cutter 1, the swing direction of the movable cutter 21 can be limited under the limitation of the guide hole 43, so that dislocation or deviation of the movable cutter 21 when the movable cutter 22 is driven to swing back and forth along the static cutter 1 is effectively prevented, and the hair trimming performance of the static cutter 1 and the movable cutter 21 and the working stability of the trimming cutter head are ensured.

The sliding groove 212 provided on the movable blade 2 is formed on the outer surface of the movable blade holder 22, and although the sliding groove 212 can limit the elastic buckle piece 31, a ball or a roller pin is additionally provided between the elastic buckle piece 31 and the movable blade holder 22, when the movable blade 21 swings reciprocally along the stationary blade 1 under the driving of the movable blade holder 22, the ball or the roller pin is also very easy to slip from between the elastic buckle piece 31 and the movable blade holder 22, which affects the end surface fitting degree between the movable blade 21 and the stationary blade 1, even the hair trimming performance. For this purpose, a rolling groove 213 is provided at the bottom of the sliding groove 212 of the movable holder 22, and the ball or the needle of the rolling element 5 is disposed in the rolling groove 213, and the length of the rolling groove 213 may be larger than the diameter of the ball or the needle, or may be matched with the diameter of the ball or the needle. Such that when the tab 31 is snapped onto the ball or roller pin, a partial outer surface of the ball or roller pin is disposed in the arcuate recess 311 in the tab 31. In the actual production process, the arc-shaped groove 311 on the elastic buckle piece 31 and the rolling groove 213 in the movable blade seat 22 can be selected from one of them, or can be selected from the two at the same time, and the specific requirement can be determined according to the user.

The above embodiments should not be construed as limiting the invention, but any modifications based on the spirit of the invention should be within the scope of the invention.

Claims

1. The self-buckling hair trimming cutter head comprises a static cutter (1) and a movable cutter (2); the hair cutter is characterized in that the hair cutter is also provided with an elastic fastener (3), the elastic fastener (3) at least comprises an elastic buckling piece (31) and at least two clamping feet (32), the clamping feet (32) are respectively connected with the static cutter (1) to enable the elastic buckling piece (31) to buckle on the movable cutter (2) to keep the end face of the movable cutter (2) attached to the end face of the static cutter (1) all the time, and the movable cutter (2) can swing back and forth along the end face of the static cutter (1) under the action of external force, so that cutting teeth arranged in the static cutter (1) and the movable cutter (2) are matched with each other to cut hair.

2. A self-fastening hair trimming head according to claim 1, characterized in that the snap member (3) comprises a body (33), the snap member (32) is provided with two snap members, one end of each snap member is connected with the body (33) into a whole, and the snap member (31) is provided with two snap members which are oppositely arranged at two ends of the body (33) and are integrally formed with the body (33).

3. Self-fastening hair-trimming cutter head according to claim 1, characterized in that a through hole (11) is provided in the centre of the stationary blade (1), a through swinging hole (211) is provided in the movable blade (2), the swinging hole (211) being larger in size than the through hole (11) and having a width larger than the reciprocating swinging distance of the movable blade (2); the clamping foot (32) respectively passes through the swing hole (211) and the through hole (11) to be hooked and connected with the outer surface of the static knife (1); the elastic buckling pieces (31) are respectively buckled on the outer surface of the movable knife (2) so that the end surfaces of the static knife (1) and the movable knife (2) are always attached.

4. A self-fastening hair-trimming cutter head according to claim 1, characterized in that a guiding mechanism (4) is arranged between the stationary blade (1) and the movable blade (2), the movable blade (2) being reciprocally swingable only in the length direction of the stationary blade (1) under the restriction of the guiding mechanism (4).

5. A self-fastening hair trimming cutter head according to claim 1, characterized in that the movable cutter (2) is provided with a sliding groove (212), and one end of the elastic fastening piece (31) fastened on the movable cutter (2) is arranged in the sliding groove (212) so that the end face of the movable cutter (2) is always adhered to the end face of the static cutter (1).

6. A self-fastening hair trimming cutter head according to claim 1, characterized in that a rolling element (5) is arranged between the elastic fastening piece (31) and the movable cutter (2), and the elastic fastening piece (31) is fastened on the rolling element (5) and contacted with the rolling element (5) so that the end face of the movable cutter (2) is always adhered to the end face of the static cutter (1).

7. A self-fastening hair trimming cutter head according to claim 6, characterized in that the contact of the snap-fastening piece (31) with the rolling element (5) is provided with an arc-shaped groove (311) matching the outer diameter of the rolling element (5), the rolling element (5) is a ball or a needle roller, which is locally arranged in the arc-shaped groove (311).

8. A self-fastening hair trimming cutter head according to any one of claims 1-7, characterized in that the movable cutter (2) comprises a movable cutter blade (21) and a movable cutter blade (22), the movable cutter blade (21) and the movable cutter blade (22) are synchronously linked, the swinging holes (211) respectively penetrate through the movable cutter blade (22) and the movable cutter blade (21), the clamping feet (32) penetrate through the swinging holes (211) on the movable cutter blade (22) and the movable cutter blade (21) and the through holes (11) in the static cutter blade (1) to be hooked and connected with the outer surface of the static cutter blade (1), the elastic fastening piece (31) is fastened on the movable cutter blade (22) to keep the movable cutter blade (21) and the end surface of the static cutter blade (1) attached all the time, and the movable cutter blade (21) is driven to reciprocate along the end surface of the static cutter blade (1) under the action of external force to enable the cutting teeth arranged on the movable cutter blade (21) to be mutually matched with the cutting teeth on the static cutter blade (1) to cut off hairs.

9. A self-fastening hair trimming head according to claim 8, characterized in that the guiding means (4) comprises at least one guiding upright (41) arranged on the movable blade holder (22), and a linkage hole (42) and a guiding hole (43) arranged at corresponding positions of the movable blade (2) and the stationary blade (1), the shape of the linkage hole (42) is matched with that of the guiding upright (41), one end of the guiding upright (41) passes through the linkage hole (42) to enable the movable blade (21) to synchronously move with the movable blade holder (22), and the end of the guiding upright (41) is inserted into the guiding hole (43).

10. A self-fastening hair trimming head according to claim 8, characterized in that the sliding groove (212) is arranged on the outer surface of the movable blade holder (22), the groove bottom of the sliding groove (212) is provided with a rolling groove (213), the rolling element (5) is arranged in the rolling groove (213), and part of the rolling element is arranged in the sliding groove (212) and is jointed with the arc-shaped groove (311) on the elastic fastening piece (31).