CN214604501U

CN214604501U - Reciprocating type hair trimmer cutter head

Info

Publication number: CN214604501U
Application number: CN202023202198.1U
Authority: CN
Inventors: 王若望
Original assignee: Cixi Jiwang Knife And Scissors Co ltd
Current assignee: Cixi Jiwang Knife And Scissors Co ltd
Priority date: 2020-12-26
Filing date: 2020-12-26
Publication date: 2021-11-05
Anticipated expiration: 2030-12-26

Abstract

The utility model discloses a reciprocating hair trimmer cutter head, which comprises an annular fixed cutter (1) with inner ring fixed teeth (111) and outer ring fixed teeth (112); the annular moving knife (2) is matched with the moving knife in shape and size and is provided with inner ring moving teeth (211) and outer ring moving teeth (212); a movable knife rotating disc (311) which is arranged in the annular fixed knife (1) and can be driven to rotate forward and backward in a reciprocating way, and the annular movable knife (2) is assembled on the movable knife rotating disc; and a base (4) which is assembled with the annular fixed knife (1) and the movable knife rotating disc (311) to form a hair trimming structure with the annular fixed knife and the movable knife rotating disc distributed up and down. Its advantage is: supporting multi-angle hair trimming.

Description

Reciprocating type hair trimmer cutter head

Technical Field

The utility model relates to a reciprocating type hair trimmer cutter head.

Background

In the prior art, a mesh enclosure and a built-in sheet-shaped blade or a mesh enclosure and a built-in grabbing type cutter head are basically adopted in the hair trimmer, the condition that the hair is not trimmed at an angle exists in the hair trimmer, and a mesh enclosure type trimmer which has a brand-new structure, can trim the hair and supports multi-angle trimming is urgently needed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a reciprocating type hair trimmer tool bit supports and is pruned the hair angularly.

In order to solve the technical problem, the utility model provides a technical scheme does: a reciprocating hair trimmer cutter head comprises an annular fixed cutter with inner ring fixed teeth and outer ring fixed teeth; the annular moving knife is matched with the moving knife in shape and size and is provided with inner ring moving teeth and outer ring moving teeth; the movable knife rotating disc is arranged in the annular fixed knife and can rotate forward and backward in a reciprocating manner under the driving of the annular fixed knife, and the annular movable knife is assembled on the movable knife rotating disc; and the base is assembled with the annular fixed knife and the movable knife rotating disc to form a hair trimming structure which is distributed up and down.

Further, the hair trimmer also comprises a fixed blade inner ring cover; the inner ring cover of the fixed knife is inserted into the inner ring of the annular fixed knife and is fixedly connected with the base, and the annular movable knife is clamped to rotate in a forward and reverse reciprocating mode within a rotation angle of 1-29 degrees.

Furthermore, the fixed cutter inner ring cover comprises a circular cover body and a baffle ring along a circle of the lower part of the circular cover body; the baffle ring is provided with a plurality of movable clamping openings of rotating disc frameworks which are distributed at intervals; after the movable cutter rotating disc is triggered to rotate, the rotating disc framework of the movable cutter rotating disc rotates in the corresponding movable clamping opening of the rotating disc framework and is clamped by the edge of the movable clamping opening of the rotating disc framework to realize the rotating angle of 1-29 degrees of the movable cutter rotating disc.

Furthermore, the fixed cutter inner ring cover also comprises a plurality of cover body inserting hooks which are distributed at the lower part of the baffle ring at equal intervals; the rotating disc framework divides the movable cutter rotating disc into hollow areas which are the same as the cover body inserting hooks in quantity and are distributed circumferentially, and the cover body inserting hooks penetrate through the corresponding hollow areas to be connected and fixed with the base.

Furthermore, the upper surface of the rotating disc framework is provided with positioning upper lugs/positioning upper convex columns which are circumferentially distributed at intervals, and the annular movable knife is provided with a positioning area which is in plug-in fit with the annular movable knife; the lower surface of the rotating disc framework is provided with a pair of rotating trigger blocks which are arranged at intervals; the reciprocating hair trimmer cutter head also comprises a horizontal rotating strip, the horizontal rotating strip is horizontally and rotatably arranged on the base, one end of the horizontal rotating strip extends into the position between the rotating trigger blocks, and the horizontal rotating strip rotates in a forward and reverse reciprocating mode to push the rotating trigger blocks to drive the rotating cutter rotating disc to rotate forward and reverse.

Furthermore, the opposite surfaces of the two rotary trigger blocks are convex arc surfaces; the horizontal rotating strip comprises a rotating trigger block poking end at one end and two spaced passive trigger ends at the other end; the outer end of the poking end of the rotary trigger block is a cylinder with the height following the height of the rotary trigger block, and the width of the part of the poking end of the rotary trigger block, which is connected with the cylinder, is smaller than the diameter of the cylinder; the poking contact between the rotating trigger block and the poking end of the rotating trigger block is concentrated on the arc surface and the outer arc surface of the cylinder.

Furthermore, the base comprises a body, a sunken accommodating cavity on the body and stop blocks which are circumferentially distributed and arranged at intervals and are surrounded on the accommodating cavity; the number of the stop blocks is the same as that of the cover body inserting hooks, and each stop block is provided with a clamping hole fixedly clamped with one cover body inserting hook; the upper edge of each block forms a supporting strip; the supporting strip supports the annular movable knife to enable the teeth of the annular movable knife to be attached to the teeth of the annular fixed knife.

Furthermore, a plurality of hollow spring mounting columns are arranged on the accommodating cavity at the periphery of the stop block, and lower convex columns which are in one-to-one up-and-down correspondence with the spring mounting columns are arranged on the rotating disc framework; the height of the rotating disc framework from the spring mounting column is greater than that of the lower convex column; the height distance from the upper end of the spring mounting column to the accommodating cavity is smaller than the height distance from the supporting bar to the accommodating cavity; and a spring with one end extending into the spring mounting column and the other end sleeved outside the lower convex column is arranged between the vertically corresponding spring mounting column and the lower convex column.

Further, the annular fixed cutter comprises an annular bottom support, an annular blade and at least two supporting parts, and a plurality of circumferential empty areas are formed between the annular bottom support and the annular blade; the outer ring fixed teeth are distributed on the outer ring periphery of the annular blade at intervals, and the inner ring fixed teeth are distributed on the inner ring periphery of the annular blade at intervals; the diameter of a circle surrounded by the edge on the outermost end of the outer ring fixed teeth is larger than the inner diameter of the annular bottom support.

Furthermore, the rotary cutting edge of the inner ring moving tooth is positioned on one side of the inner ring moving tooth or positioned on two sides of the inner ring moving tooth; the rotary cutting edge of the outer ring moving teeth is positioned on one side of the outer ring moving teeth or positioned on two sides of the outer ring moving teeth; in addition, the inner ring moving teeth and the outer ring moving teeth which are matched with each other inside and outside form rotary cutting edges which are positioned on the same side or both sides.

Compared with the prior art, the structure design has the following advantages:

in the design, the outer ring fixed teeth and the inner ring fixed teeth of the annular fixed cutter are smoothly attached to skin in a surface-to-surface contact manner, and surface-to-surface contact trimming is realized under the ground matching of the inner ring movable teeth and the outer ring movable teeth; in addition, the outer ring fixed teeth of the annular fixed cutter contact the skin at a proper inclination angle, and the whole trimmer realizes angle contact with the skin to trim hair by means of the matching of the outer ring movable teeth, so that the aim of further trimming the hair in an angle manner after the surface-to-surface contact trimming is met is integrally fulfilled.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a perspective view of fig. 1 from another angle.

Fig. 4 is an exploded view of fig. 3.

Fig. 5 is a perspective view of fig. 1 from another angle.

Fig. 6 is a schematic perspective view of fig. 5 with the base removed.

Fig. 7 is a schematic structural view of the present invention after removing the annular stationary knife and the annular base housing.

Fig. 8 is a schematic view of a ring blade according to another embodiment of the present invention.

Fig. 9 is a schematic view of a ring blade according to another embodiment of the present invention.

Fig. 10 is a schematic plan view of the annular stationary knife of the present invention.

Shown in the figure: 1. an annular fixed cutter; 111. inner ring fixed teeth; 112. outer ring fixed teeth; 113. an annular collet; 114. An annular blade; 2. an annular movable knife; 211. inner ring moving teeth; 212. outer ring moving teeth; 311. a moving blade rotating disc; 312. a rotating disc skeleton; 313. a hollow-out area; 314. rotating the trigger block; 315. horizontally rotating the strip; 316. A circular arc surface; 317. a lower convex column; 318. a through hole; 4. a base; 411. a body; 412. an accommodating chamber; 413. A support bar; 414. a stopper; 415. a clamping hole; 416. a spring mounting post; 417. a body outer flange; 5. a fixed cutter inner ring cover; 511. a circular cover body; 512. the cover body is inserted with a hook; 513. a baffle ring; 514. the opening is clamped movably by the rotating disc framework; 515. an inner ring cover positioning column; 6. rotating the toggle end of the trigger block; 7. a passive trigger terminal; 8. a spring; 911. an inner space avoiding area; 912. an outer keep-out zone; 10. a base annular housing; 1011. a clamping groove in the outer cover.

Detailed Description

The present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.

The present embodiment discloses a reciprocating hair trimmer head, which is shown in fig. 1-10, and comprises an annular fixed knife 1 with inner ring fixed teeth 111 and outer ring fixed teeth 112, an annular movable knife 2 with inner ring movable teeth 211 and outer ring movable teeth 212, a movable knife rotating disk 311, a base 4 and a horizontal rotating strip 315, wherein the shape and the size of the annular fixed knife are matched with those of the annular fixed knife 1.

The movable knife rotating disk 311 is provided with the annular movable knife 2, the base 4 is responsible for assembling the annular fixed knife 1, and the movable knife rotating disk 311 means that the annular fixed knife 1 and the movable knife rotating disk 311 are installed on the base 4, and the annular fixed knife 1 and the movable knife rotating disk 311 form a vertically distributed hair trimming state after being assembled, that is, the inner ring fixed teeth 111 and the outer ring fixed teeth 112 of the annular fixed knife 1 are correspondingly attached to the inner ring movable teeth 211 and the outer ring movable teeth 212 of the annular movable knife 2.

How does the trimming of hair? The overall analysis is as follows: the inner ring moving teeth 211 and the outer ring moving teeth 212 are rotationally matched with the inner ring fixed teeth 111 and the outer ring fixed teeth 112 to trim hairs, and the annular moving blade 2 reciprocates forwards and backwards, which is roughly shown in F1 and F2 in the figure 1.

In addition, in order to more intuitively reflect that the outer ring fixed teeth 112 of the annular fixed knife 1 contact the skin at a proper inclination angle, the whole trimmer realizes the angular contact with the skin to trim the hair by means of the cooperation of the outer ring movable teeth 111, so that the aim of further trimming the hair in an angular manner after the surface-to-surface contact trimming is met is integrally realized. In fig. 3, the skin surfaces in different directions are respectively presented by S1 and S2, and the skin surface S1 and the skin surface S2 can be trimmed.

The hair trimming process in the above manner needs to be supported by the following structures of the annular fixed blade 1 and the annular movable blade 2, but is not limited to the following structures.

Here, the structure of the annular stationary blade 1 and the annular movable blade 2 will be described.

The annular stationary knife 1 in one structural form is as follows:

the annular stationary knife 1 comprises an annular shoe 113, an annular blade 114, and at least two supports 115 between the annular shoe 113 and the annular blade 114 to form a plurality of circumferential empty areas between the annular shoe 113 and the annular blade 114;

in addition, the diameter of a circle surrounded by edges on the outermost ends of the outer ring fixed teeth 112 is larger than the inner diameter of the annular bottom support 113 and smaller than the outer diameter of the annular bottom support 113. Referring to fig. 10, the outer ring teeth 112 have a circle Y1 surrounded by the edges at the outermost ends thereof, the inner circle of the ring mount 113 is identified by Y2, the outer circle of the ring mount 113 is identified by Y3, and the diameter of the circle Y1 is smaller than the diameter of the circle Y3 and larger than the diameter of the circle Y2.

The annular movable knife 2 in one structural form is as follows:

as shown in fig. 8, the annular moving blade 2 has an inner ring moving tooth 211 and an outer ring moving tooth 212, the rotating cutting edge of the inner ring moving tooth 211 is located on one side of the inner ring moving tooth 211, the rotating cutting edge of the outer ring moving tooth 212 is located on one side of the outer ring moving tooth 212, the rotating cutting edge of the inner ring moving tooth 211 and the rotating cutting edge of the outer ring moving tooth 212 are identified by Q1 in fig. 8, a first inner clearance area 911 is formed on the inner flat contact surface of the inner trimming tooth 211, and a second outer clearance area 912 is formed on the outer flat contact surface of the outer trimming tooth 212.

The annular moving knife 2 in another structural form is as follows:

as shown in fig. 9, the annular moving blade 2 has inner ring moving teeth 211 and outer ring moving teeth 212, the rotary cutting edges of the inner ring moving teeth 211 are located on both sides of the inner ring moving teeth 211, the rotary cutting edges of the outer ring moving teeth 212 are located on both sides of the outer ring moving teeth 212, the rotary cutting edges of the inner ring moving teeth 211 and the rotary cutting edges of the outer ring moving teeth 212 are identified by Q2 in fig. 9, a second inner clearance area 913 is formed on the inner flat contact surface of the inner trimming teeth 211, and a second outer clearance area 914 is formed on the outer flat contact surface of the outer trimming teeth 212.

The annular moving knife 2 in another structural form is as follows:

as shown in fig. 1-7, the annular moving blade 2 has inner ring moving teeth 211 and outer ring moving teeth 212, the rotary cutting edges of the inner ring moving teeth 211 are located at two sides of the inner ring moving teeth 211, and the rotary cutting edges of the outer ring moving teeth 212 are located at two sides of the outer ring moving teeth 212.

As shown in fig. 1-4, the hair trimmer further comprises a stationary blade inner ring cover 5; the fixed knife inner ring cover 5 is inserted into the inner ring of the annular fixed knife 1 and is fixedly connected with the base 4, the annular movable knife 2 is clamped to rotate in a forward and reverse reciprocating mode at a rotation angle of 1-29 degrees, and the rotation angle of 1-29 degrees is marked by a in figure 1.

As shown in fig. 2 and 4, the fixed knife inner ring cover 5 includes a circular cover body 511, a retaining ring 513 which is arranged around the lower part of the circular cover body 511, a plurality of cover body inserting hooks 512 which are distributed at equal intervals on the lower part of the retaining ring 513, and inner ring cover positioning posts 515 which are arranged on the lower surface of the circular cover body 511; the rotating disc framework 312 divides the moving blade rotating disc 311 into 3 hollow areas 313 which are the same as the cover body inserting hooks 512 in number and are distributed circumferentially, the moving blade rotating disc 311 in the middle area surrounded by the 3 hollow areas 313 is provided with through holes 318, the cover body inserting hooks 512 penetrate through the corresponding hollow areas 313 to be connected and fixed with the base 4, the inner ring cover positioning columns 515 penetrate through the through holes 318, and the blocking rings 513 are provided with a plurality of rotating disc framework movable clamping openings 514 which are distributed at intervals; after the movable knife rotating disk 311 is triggered to rotate, the rotating disk framework 312 of the movable knife rotating disk 311 rotates in the corresponding rotating disk framework movable clamping opening 514 and is clamped by the edge of the rotating disk framework movable clamping opening 514 to realize a rotating angle of 1-29 degrees of the movable knife rotating disk 311.

As shown in fig. 2 and 4, the upper surface of the rotating disc skeleton 312 has positioning upper protrusions/positioning upper protruding columns distributed at intervals in the circumferential direction, and the annular moving blade 2 is provided with a positioning region in insertion fit therewith; a pair of rotating trigger blocks 314 arranged at intervals are arranged on the lower surface of the rotating disc framework 312; the horizontal rotating bar 315 is horizontally and rotatably installed on the base 4 and one end of the horizontal rotating bar is inserted between the rotating trigger blocks 314, and the horizontal rotating bar 315 rotates back and forth to push the rotating trigger blocks 314 to drive the movable blade rotating disk 311 to rotate back and forth.

As shown in fig. 2 and 6, the opposite surfaces of the two rotation triggering blocks 314 are convex arc surfaces 316; the horizontal rotating strip 315 comprises a rotating trigger block toggle end 6 at one end and two spaced passive trigger ends 7 at the other end; the outer end of the rotating trigger block stirring end 6 is a cylinder 611 with the height following the height of the rotating trigger block 314, and the width of the connecting part of the rotating trigger block stirring end 6 and the cylinder 611 is smaller than the diameter of the cylinder 611; the poking contact between the rotary trigger block 314 and the rotary trigger block poking end 6 is concentrated on the arc surface 316 and the outer arc surface of the cylinder 611, and by the design, the damage caused by the fact that the rotary trigger block poking end 6 impacts the rotary trigger block 314 is reduced, and the service lives of the rotary trigger block 314 and the rotary trigger block poking end 6 are prolonged. In addition, the horizontal rotating bar 315 is powered, that is, a swing link is used for driving the horizontal rotating bar 315 to rotate, and is marked by F in fig. 1-7.

As shown in fig. 2 and fig. 6, the base 4 includes a body 411, a sunken accommodating cavity 412 on the body 411, stoppers 414 circumferentially distributed and spaced on the accommodating cavity 412, a body outer flange 417 on the outer periphery of the body 411, and a base annular housing 10; the body outer flange 417 is fastened with the housing inner fastening slot 1011 of the base annular housing 10 by screwing, and after the two are fastened, the upper edge of the base annular housing 10 is flush with the upper edge of the annular bottom bracket 113, the number of the stoppers 414 is the same as that of the cover body inserting fastening hooks 512, namely 3 stoppers 414 and 3 cover body inserting fastening hooks 512 are correspondingly arranged, and each stopper 414 is provided with a fastening hole 415 for fastening with one cover body inserting fastening hook 512; the upper edge of each block 414 forms 3 support bars 413; the 3 supporting strips 413 support the annular movable knife 2 to enable the teeth of the annular movable knife to be attached to the teeth of the annular fixed knife 1, the horizontal rotating strip 315 horizontally lies on the accommodating cavity 412 and is connected through a vertical pin shaft to rotate horizontally, one end of the horizontal rotating strip 315 is branched into two spaced passive trigger ends 7, the passive trigger ends are arranged in an area defined by 3 stop blocks 414 of the accommodating cavity 412, the other end of the horizontal rotating strip 315 is provided with a rotating trigger block shifting end 6 outside two adjacent stop blocks 414, after the whole hair trimmer is assembled, the rotating trigger block shifting end 6 is arranged between a pair of rotating trigger blocks 314, and the arc surface 316 of the rotating trigger block 314 faces the rotating trigger block shifting end 6.

As shown in fig. 2 and 7, a plurality of hollow spring mounting posts 416 are arranged in the accommodating cavity 412 on the periphery of the stopper 414, the number of the spring mounting posts 416 is 3, the spring mounting posts 416 are circumferentially distributed at equal intervals, lower protruding posts 317 corresponding to the spring mounting posts 416 one by one are arranged on the rotating disc framework 312, the lower protruding posts 317 are correspondingly arranged at 3, the lower protruding posts 317 are circumferentially distributed at equal intervals, and the height of the rotating disc framework 312 from the spring mounting posts 416 is greater than the height of the lower protruding posts 317; the height distance from the upper end of the spring mounting column 416 to the accommodating cavity 412 is smaller than the height distance from the supporting bar 413 to the accommodating cavity 412; essentially, a distance is reserved between the lower convex column 317 and the corresponding spring mounting column 416, and a spring 8 with one end extending into the spring mounting column 416 and the other end sleeved outside the lower convex column 317 is arranged between the upper spring mounting column 416 and the lower convex column 317.

The foregoing is illustrative of the preferred embodiments of the present invention only, and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and all the changes made within the scope of the independent claims of the present invention are within the scope of the present invention.

Claims

1. A reciprocating hair trimmer head, characterized in that: it comprises

An annular fixed cutter (1) with inner ring fixed teeth (111) and outer ring fixed teeth (112);

the annular moving knife (2) is matched with the moving knife in shape and size and is provided with inner ring moving teeth (211) and outer ring moving teeth (212);

a movable knife rotating disc (311) which is arranged in the annular fixed knife (1) and can be driven to rotate forward and backward in a reciprocating way, and the annular movable knife (2) is assembled on the movable knife rotating disc;

and a base (4) which is assembled with the annular fixed knife (1) and the movable knife rotating disc (311) to form a hair trimming structure with the annular fixed knife and the movable knife rotating disc distributed up and down.

2. A reciprocating hair trimmer head according to claim 1 and wherein:

the hair trimmer further comprises a fixed blade inner ring cover (5);

the fixed cutter inner ring cover (5) is inserted into the inner ring of the annular fixed cutter (1) and is fixedly connected with the base (4), and the annular movable cutter (2) is clamped to rotate forward and backward under a rotation angle of 1-29 degrees.

3. A reciprocating hair trimmer head according to claim 2 wherein:

the fixed cutter inner ring cover (5) comprises a circular cover body (511) and a retaining ring (513) which is arranged along the lower part of the circular cover body (511) in a circle;

the baffle ring (513) is provided with a plurality of rotating disc framework movable clamping openings (514) which are distributed at intervals;

after the movable knife rotating disc (311) is triggered to rotate, the rotating disc framework (312) of the movable knife rotating disc (311) rotates in the corresponding rotating disc framework movable clamping opening (514) and is clamped by the edge of the rotating disc framework movable clamping opening (514) to realize a rotating angle of 1-29 degrees of the movable knife rotating disc (311).

4. A reciprocating hair trimmer head according to claim 3 and wherein:

the fixed cutter inner ring cover (5) also comprises a plurality of cover body inserting hooks (512) which are distributed at the lower part of the baffle ring (513) at equal intervals;

the rotating disk framework (312) divides the moving blade rotating disk (311) into hollow areas (313) which are the same as the cover body inserting hooks (512) in number and are distributed circumferentially, and the cover body inserting hooks (512) penetrate through the corresponding hollow areas (313) to be connected and fixed with the base (4).

5. A reciprocating hair trimmer head according to claim 3 and wherein:

the upper surface of the rotating disc framework (312) is provided with positioning upper lugs/positioning upper convex columns which are circumferentially distributed at intervals, and the annular moving knife (2) is provided with a positioning area which is in plug-in fit with the annular moving knife;

a pair of rotating trigger blocks (314) arranged at intervals are arranged on the lower surface of the rotating disc framework (312);

the reciprocating type hair trimmer cutter head also comprises a horizontal rotating bar (315), the horizontal rotating bar (315) is horizontally and rotatably arranged on the base (4) and one end of the horizontal rotating bar is arranged between the rotating trigger blocks (314), and the horizontal rotating bar (315) rotates forwards and backwards in a reciprocating mode to push the rotating trigger blocks (314) to drive the movable cutter rotating disc (311) to rotate forwards and backwards.

6. A reciprocating hair trimmer head according to claim 5 wherein:

the opposite surfaces of the two rotary trigger blocks (314) are convex arc surfaces (316);

the horizontal rotating strip (315) comprises a rotating trigger block shifting end (6) at one end, and two spaced passive trigger ends (7) at the other end, wherein the passive trigger ends (7) are stressed to drive the horizontal rotating strip (315) to rotate;

the outer end of the rotating trigger block stirring end (6) is a cylinder (611) with the height following the height of the rotating trigger block (314), and the width of the part of the rotating trigger block stirring end (6) connected with the cylinder (611) is smaller than the diameter of the cylinder (611);

the poking contact of the rotating trigger block (314) and the poking end (6) of the rotating trigger block is concentrated on the arc surface (316) and the outer arc surface of the cylinder (611).

7. A reciprocating hair trimmer head according to claim 3 and wherein:

the base (4) comprises a body (411), a sunken accommodating cavity (412) on the body (411), and stop blocks (414) which are circumferentially distributed and arranged at intervals and are surrounded on the accommodating cavity (412);

the number of the stop blocks (414) is the same as that of the cover body inserting hooks (512), and each stop block (414) is provided with a clamping hole (415) fixedly clamped with one cover body inserting hook (512);

the upper edge of each block (414) forms a supporting strip (413); the supporting strip (413) supports the annular movable knife (2) to enable the teeth of the annular movable knife to be attached to the teeth of the annular fixed knife (1).

8. A reciprocating hair trimmer head according to claim 7 wherein:

a plurality of hollow spring mounting posts (416) are provided in the receiving cavity (412) at the periphery of the stop (414),

lower convex columns (317) which are in one-to-one up-and-down correspondence with the spring mounting columns (416) are arranged on the rotating disc framework (312); the height of the rotating disc framework (312) from the spring mounting column (416) is greater than that of the lower convex column (317);

the height distance from the upper end of the spring mounting column (416) to the accommodating cavity (412) is smaller than the height distance from the supporting bar (413) to the accommodating cavity (412);

a spring (8) with one end extending into the spring mounting column (416) and the other end sleeved outside the lower convex column (317) is arranged between the upper spring mounting column (416) and the lower convex column (317) which are corresponding up and down.

9. A reciprocating hair trimmer head according to claim 1 and wherein:

the annular fixed knife (1) comprises

An annular bottom support (113),

an annular blade (114),

and at least two supports (115) between the annular shoe (113) and the annular blade (114) to allow the formation of circumferential empty zones between the annular shoe (113) and the annular blade (114); the outer ring peripheral edge of the annular blade (114) is distributed with the outer ring fixed teeth (112) at intervals, the inner ring peripheral edge of the annular blade (114) is distributed with the inner ring fixed teeth (111) at intervals, and the diameter of a circle formed by the surrounding of the edge on the outermost end of the outer ring fixed teeth (112) is larger than the inner diameter of the annular bottom support (113).

10. A reciprocating hair trimmer head according to claim 1 and wherein:

the rotary cutting edge of the inner ring moving tooth (211) is positioned on one side of the inner ring moving tooth (211) or positioned on two sides of the inner ring moving tooth (211); the rotary cutting edge of the outer ring moving tooth (212) is positioned on one side of the outer ring moving tooth (212) or positioned on two sides of the outer ring moving tooth (212); in addition, the rotating cutting edges formed by the inner ring moving teeth (211) and the outer ring moving teeth (212) which are matched with each other inside and outside are positioned on the same side or both sides.