Reciprocating hair trimmer head

Abstract

The present invention discloses a reciprocating hair trimmer head, which comprises an annular fixed blade (1) having inner circle fixed teeth (111) and outer circle fixed teeth (112); an annular movable blade (2) having inner circle movable teeth (211) and outer circle movable teeth (212) of a shape and size matching the annular fixed blade (1); a movable blade rotating disk (311) installed in the annular fixed blade (1) and capable of reciprocating forward and reverse rotation when driven, on which the annular movable blade (2) is mounted; and a base (4) on which the annular fixed blade (1) and the movable blade rotating disk (311) are mounted to form a hair trimming structure in which the annular fixed blade (1) and the movable blade rotating disk (311) are arranged up and down. The advantages thereof are: it supports trimming hair at multiple angles.

Description

Technical Field

[0001] The invention relates to a reciprocating hair trimmer cutter head. Background Art

[0002] In the existing prior art, hair trimmers basically use a mesh cover and a built-in sheet blade or a mesh cover and a built-in gripping blade disc. This type of trimmer does not meet the requirement of trimming hair at an angle. There is an urgent need for a mesh cover trimmer with a completely new structure that can trim hair at multiple angles. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a reciprocating hair trimmer head which supports trimming hair at an angle.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: a reciprocating hair trimmer head, which comprises an annular fixed knife with inner circle fixed teeth and outer circle fixed teeth; an annular movable knife with inner circle movable teeth and outer circle movable teeth of shape and size matching the annular fixed knife; a movable knife rotating disk which is installed in the annular fixed knife and can be driven to reciprocate forward and reverse, and the annular movable knife is installed on it; and a base, which is installed with the annular fixed knife and the movable knife rotating disk to form a hair trimming structure in which the annular fixed knife and the movable knife rotating disk are distributed up and down.

[0005] Furthermore, the hair trimmer also includes a fixed knife inner ring cover; the fixed knife inner ring cover is inserted into the inner ring of the annular fixed knife and is connected and fixed to the base, and clamps the annular movable knife to rotate back and forth at a rotation angle of 1-29 degrees.

[0006] Furthermore, the fixed knife inner ring cover includes a circular cover body and a retaining ring along the lower part of the circular cover body; the retaining ring is provided with a plurality of movable clamping openings of the rotating disk frame distributed at intervals; after the moving knife rotating disk is triggered to rotate, the rotating disk frame of the moving knife rotating disk rotates in the corresponding movable clamping opening of the rotating disk frame and is clamped by the edge of the movable clamping opening of the rotating disk frame to realize a rotation angle of 1-29 degrees of the moving knife rotating disk.

[0007] Furthermore, the fixed knife inner ring cover also includes a plurality of cover body plug-in hooks which are evenly spaced and distributed at the lower part of the retaining ring; the rotating disk skeleton divides the movable knife rotating disk into hollow areas which are the same in number as the cover body plug-in hooks and are distributed circumferentially, and the cover body plug-in hooks pass through their corresponding hollow areas and are connected and fixed to the base.

[0008] Furthermore, the upper surface of the rotating disk skeleton has circumferentially spaced positioning upper protrusions / positioning upper protrusions, and the annular movable knife is provided with a positioning area that forms an insertion fit therewith; the lower surface of the rotating disk skeleton has a pair of spaced rotating trigger blocks; the reciprocating hair trimmer head also includes a horizontal rotating bar, which is horizontally rotatably mounted on the base and one end of which extends between the rotating trigger blocks, and the horizontal rotating bar rotates back and forth to push the rotating trigger block to drive the movable knife rotating disk to rotate forward and backward.

[0009] Furthermore, the opposing surfaces of the two rotating trigger blocks are convex arc surfaces; the horizontal rotating bar includes a rotating trigger block toggle end at one end and two spaced passive trigger ends at the other end; the outer end of the rotating trigger block toggle end is a cylinder whose height is the same as the height of the rotating trigger block, and the width of the portion where the rotating trigger block toggle end is connected to the cylinder is smaller than the diameter of the cylinder; the toggle contact between the rotating trigger block and the rotating trigger block toggle end is concentrated on the arc surface and the outer arc surface of the cylinder.

[0010] Furthermore, the base includes a main body, a sunken accommodating cavity on the main body, and block blocks distributed in a circle and arranged at intervals on the accommodating cavity; the number of the block blocks is the same as the number of the cover body plug-in hooks, and each of the block blocks has a card hole for being plugged and fixed with a cover body plug-in hook; a support strip is formed on the upper edge of each block; the support strip supports the annular movable knife so that its teeth are in close contact with the teeth of the annular fixed knife.

[0011] Furthermore, there are multiple hollow spring mounting columns on the accommodating cavity outside the block, and there are lower convex columns on the rotating disk frame that correspond to the spring mounting columns one by one; the height of the rotating disk frame from the spring mounting column is greater than the height of the lower convex column; the height distance from the upper end of the spring mounting column to the accommodating cavity is less than the height distance from the supporting bar to the accommodating cavity; a spring with one end extending into the spring mounting column and the other end being sleeved outside the lower convex column is provided between the upper and lower corresponding spring mounting columns and the lower convex column.

[0012] Furthermore, the annular fixed knife includes an annular base, an annular blade, and at least two supporting parts, so that a plurality of circumferential empty areas are formed between the annular base and the annular blade; the outer ring fixed teeth are distributed at intervals along the outer ring circumference of the annular blade, and the inner ring fixed teeth are distributed at intervals along the inner ring circumference of the annular blade; the diameter of the circle enclosed by the edges on the outermost ends of the annular trimming outer fixed teeth is greater than the inner diameter of the annular base.

[0013] Furthermore, the rotating cutting edge of the inner ring moving teeth is located on one side of the inner ring moving teeth or on both sides of the inner ring moving teeth; the rotating cutting edge of the outer ring moving teeth is located on one side of the outer ring moving teeth or on both sides of the outer ring moving teeth; in addition, the rotating cutting edges formed by the inner and outer ring moving teeth that are paired inside and outside are respectively on the same side or on both sides.

[0014] Compared with the prior art, the above structural design has the following advantages:

[0015] In the present design, the outer ring fixed teeth and the inner ring fixed teeth of the annular fixed knife are in flat surface contact with the skin, and with the cooperation of the inner ring movable teeth and the outer ring movable teeth, surface-to-surface contact trimming is achieved; in addition, the outer ring fixed teeth of the annular fixed knife are in contact with the skin at a suitable inclination angle, and with the cooperation of the outer ring movable teeth, the entire trimmer is in contact with the skin at an angle to trim the hair, thereby achieving the purpose of trimming the hair at an angle after satisfying surface-to-surface contact trimming as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0017] Figure 2 yes Figure 1 Exploded diagram.

[0018] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure from another perspective.

[0019] Figure 4 yes Figure 3 Exploded diagram.

[0020] Figure 5 yes Figure 1 Schematic diagram of the three-dimensional structure from another perspective.

[0021] Figure 6 yes Figure 5 Schematic diagram of the three-dimensional structure after removing the base

[0022] Figure 7 It is a schematic diagram of the structure of the present invention after the annular fixed blade and the annular outer cover of the base are removed.

[0023] Figure 8 It is a schematic structural diagram of an annular blade of another structural form of the present invention.

[0024] Fig. 9 It is a schematic structural diagram of an annular blade of another structural form of the present invention.

[0025] Fig.10 It is a schematic diagram of the planar structure of the annular fixed knife of the present invention.

[0026] As shown in the figure: 1. annular fixed knife; 111. inner ring fixed teeth; 112. outer ring fixed teeth; 2. annular blade; 211. inner ring moving teeth; 212. outer ring moving teeth; 311. moving knife rotating disk; 312. rotating disk frame; 313. hollow area; 314. rotating trigger block; 315. horizontal rotating bar; 316. arc surface; 317. lower convex column; 318. through hole; 4. base; 411. body; 412. accommodating cavity; 413. support bar; 4 14. Block; 415. Clamping hole; 416. Spring mounting column; 417. Outer flange of the body; 5. Inner ring cover of the fixed knife; 511. Circular cover body; 512. Hook for inserting the cover body; 513. Block ring; 514. Active clamping opening of the rotating disk skeleton; 515. Positioning column of the inner ring cover; 6. Driving end of the rotating trigger block; 7. Passive trigger end; 8. Spring; 911. Inner avoidance zone; 912. Outer avoidance zone; 10. Annular outer cover of the base; 1011. Slot in the outer cover. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0028] This embodiment discloses a reciprocating hair trimmer head. Figure 1-Figure 10 As shown, it includes 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 of shape and size adapted thereto, a movable knife rotating disk 311, a base 4 and a horizontal rotating bar 315.

[0029] Among them, the annular movable knife 2 is assembled on the movable knife rotating disk 311, and the base 4 is responsible for assembling the above-mentioned annular fixed knife 1 and the movable knife rotating disk 311, which 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 hair trimming state distributed up and down after assembly, that is, the inner circle fixed teeth 111 and the outer circle fixed teeth 112 of the annular fixed knife 1 are in close contact with the inner circle movable teeth 211 and the outer circle movable teeth 212 of the annular movable knife 2.

[0030] How to trim hair is generally analyzed as follows: the inner ring moving teeth 211 and the outer ring moving teeth 212 rotate together with the inner ring fixed teeth 111 and the outer ring fixed teeth 112 to trim hair, and the annular moving knife 2 moves back and forth, roughly as shown in FIG. Figure 1 Among F1 and F2.

[0031] In addition, in order to more intuitively reflect that the outer ring fixed teeth 112 of the annular fixed blade 1 contact the skin at a suitable tilt angle, with the cooperation of the outer ring movable teeth 111, the entire trimmer achieves the purpose of trimming hair at an angle by contacting the skin, thereby achieving the purpose of trimming hair at an angle after satisfying the full contact trimming. Figure 3In the figure, we present skin surfaces in different directions with S1 and S2 respectively, and both can achieve trimming of skin surface S1 and skin surface S2.

[0032] The process of trimming hair in the above manner requires the support of the following structures of the annular fixed blade 1 and the annular movable blade 2, but is not limited to the following.

[0033] Here, the structures of the annular fixed blade 1 and the annular movable blade 2 are introduced.

[0034] One of the structural forms of the annular fixed knife 1 is as follows:

[0035] The annular fixed blade 1 comprises an annular base 113, an annular blade 114, and at least two supporting parts 115, between which a plurality of circumferential empty areas are formed;

[0036] In addition, the following further improvement can be made: the diameter of the circle formed by trimming the edge on the outermost end of the external fixed tooth 211 is larger than the inner diameter of the annular base 113 and smaller than the outer diameter of the annular base 113. Fig.10 As shown, the circle Y1 is surrounded by the edge on the outermost end of the trimmed external fixed tooth 211, the inner circle of the annular base 113 is marked with Y2, and the outer circle of the annular base 113 is marked with Y3. The diameter of the circle Y1 is smaller than the diameter of the circle Y3, but larger than the diameter of the circle Y2.

[0037] One of the structural forms of the annular movable knife 2 is as follows:

[0038] See Figure 8 As shown, the annular movable blade 2 has an inner ring movable tooth 211 and an outer ring movable tooth 212. The rotating cutting edge of the inner ring movable tooth 211 is located on one side of the inner ring movable tooth 211, and the rotating cutting edge of the outer ring movable tooth 212 is located on one side of the outer ring movable tooth 212. The rotating cutting edges of the inner ring movable tooth 211 and the outer ring movable tooth 212 are arranged at the same time. Figure 8 As indicated by Q1 , a sunken first inner clearance zone 911 is formed on the inner flat contact surface of the inner trimming tooth 211 , and a sunken second outer clearance zone 912 is formed on the outer flat contact surface of the outer trimming tooth 212 .

[0039] Another structural form of the annular movable knife 2 is as follows:

[0040] See Fig. 9 As shown, the annular movable blade 2 has an inner ring movable tooth 211 and an outer ring movable tooth 212. The rotating cutting edges of the inner ring movable tooth 211 are located on both sides of the inner ring movable tooth 211, and the rotating cutting edges of the outer ring movable tooth 212 are located on both sides of the outer ring movable tooth 212. Fig. 9As indicated by Q2 , a sunken second inner clearance zone 913 is formed on the inner flat contact surface of the inner trimming tooth 211 , and a sunken second outer clearance zone 914 is formed on the outer flat contact surface of the outer trimming tooth 212 .

[0041] Another structural form of the annular movable knife 2 is as follows:

[0042] See Figure 1-Figure 7 As shown, the annular movable knife 2 has an inner ring movable tooth 211 and an outer ring movable tooth 212, the rotating cutting edge of the inner ring movable tooth 211 is located on both sides of the inner ring movable tooth 211, and the rotating cutting edge of the outer ring movable tooth 212 is located on both sides of the outer ring movable tooth 212.

[0043] See Figure 1-Figure 4 As shown, the hair trimmer also includes a fixed knife 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 connected and fixed to the base 4, and clamps the annular movable knife 2 to rotate back and forth at a rotation angle of 1-29 degrees. Figure 1 It is marked with a.

[0044] See Figure 2 and Figure 4 As shown, the fixed knife inner ring cover 5 includes a circular cover body 511, a retaining ring 513 along the lower part of the circular cover body 511, a plurality of cover body plug-in hooks 512 distributed at equal intervals at the lower part of the retaining ring 513, and an inner ring cover positioning column 515 on the lower surface of the circular cover body 511; the rotating disk skeleton 312 divides the movable knife rotating disk 311 into hollow areas 313 of the same number as the cover body plug-in hooks 512 and distributed circumferentially, the number of hollow areas 313 is 3, and the movable knife rotating disk 311 in the middle area surrounded by the three hollow areas 313 has a through hole 31 8. The cover body plug-in hook 512 passes through its corresponding hollow area 313 and is connected and fixed to the base 4. The inner ring cover positioning column 515 passes through the through hole 318. The retaining ring 513 is provided with a plurality of spaced-apart rotating disk frame movable clamping openings 514. After the movable knife rotating disk 311 is triggered to rotate, the rotating disk frame 312 of the movable knife rotating disk 311 rotates in the corresponding rotating disk frame movable clamping opening 514 and is clamped by the edge of the rotating disk frame movable clamping opening 514 to realize the rotating angle of the movable knife rotating disk 311 of 1-29 degrees.

[0045] See Figure 2 and Figure 4As shown, the upper surface of the rotating disk skeleton 312 has circumferentially spaced positioning upper protrusions / positioning upper protrusions, and the annular movable knife 2 is provided with a positioning area that forms an insertion fit therewith; the lower surface of the rotating disk skeleton 312 has a pair of spaced rotation trigger blocks 314; the horizontal rotating bar 315 is horizontally rotatably mounted on the base 4 and one end of it extends between the rotation trigger blocks 314, and the horizontal rotating bar 315 rotates back and forth to push the rotation trigger block 314 to drive the movable knife rotating disk 311 to rotate forward and reverse.

[0046] See Figure 2 and Figure 6 As shown, the opposing surfaces of the two rotating trigger blocks 314 are convex arc surfaces 316; the horizontal rotating bar 315 includes 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 toggle end 6 is a cylinder 611 whose height is the same as the height of the rotating trigger block 314, and the width of the portion where the rotating trigger block toggle end 6 is connected to the cylinder 611 is smaller than the diameter of the cylinder 611; the toggle contact between the rotating trigger block 314 and the rotating trigger block toggle end 6 is concentrated on the arc surface 316 and the outer arc surface of the cylinder 611. This design reduces the damage caused by the rotating trigger block toggle end 6 hitting the rotating trigger block 314 and increases the service life of both. In addition, a swing rod is provided to provide power to the horizontal rotating bar 315, that is, to drive the horizontal rotating bar 315 to rotate. Figure 1-Figure 7 It is marked with F.

[0047] See Figure 2 and Figure 6As shown, the base 4 includes a body 411, a sunken accommodating cavity 412 on the body 411, stoppers 414 distributed in a circle and arranged at intervals on the accommodating cavity 412, and a body outer flange 417 and a base annular outer cover 10 on the outer periphery of the body 411; the body outer flange 417 and the outer cover inner card groove 1011 of the base annular outer cover 10 are engaged by rotation, and after the two are engaged, the upper edge of the base annular outer cover 10 is flush with the upper edge of the annular bottom bracket 113, and the number of the stoppers 414 is the same as the number of the cover body plug-in hooks 512, that is, there are 3 stoppers 414 and 3 cover body plug-in hooks 512, and each of the stoppers 414 has a card hole 41 fixed with a cover body plug-in hook 512. 5; three supporting strips 413 are formed on the upper edge of each stopper 414; the three supporting strips 413 support the annular movable knife 2 so that its teeth are in close contact with the teeth of the annular fixed knife 1; the horizontal rotating strip 315 lies horizontally on the accommodating chamber 412 and is connected to the horizontal rotation through a vertical pin shaft; one end of the horizontal rotating strip 315 is bifurcated into two spaced passive trigger ends 7, which are in the area surrounded by the three stoppers 414 of the accommodating chamber 412; the other end of the horizontal rotating strip 315 is the rotating trigger block toggle end 6 outside the two adjacent stoppers 414; after the entire hair trimmer is assembled, the rotating trigger block toggle end 6 is between a pair of rotating trigger blocks 314, and the arc surface 316 of the rotating trigger block 314 faces the rotating trigger block toggle end 6.

[0048] See Figure 2 and Figure 7 As shown, there are multiple hollow spring mounting columns 416 on the accommodating cavity 412 outside the stopper 414, the number of the spring mounting columns 416 is 3 and they are distributed at equal intervals around the circumference, and there are lower bosses 317 on the rotating disk skeleton 312 corresponding to the spring mounting columns 416 one by one up and down, corresponding to 3 lower bosses 317 and distributed at equal intervals around the circumference, the height of the rotating disk skeleton 312 from the spring mounting columns 416 is greater than the height of the lower bosses 317; the height distance from the upper end of the spring mounting column 416 to the accommodating cavity 412 is less than the height distance from the supporting bar 413 to the accommodating cavity 412; essentially, a distance is left between the lower boss 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 being sleeved on the outside of the lower boss 317 is provided between the corresponding spring mounting columns 416 and the lower boss 317.

[0049] The above is only an explanation of the best embodiment of the present invention, which should not be construed as a limitation on the claims. The present invention is not limited to the above embodiments, and all changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A reciprocating hair trimmer head, characterized in that: It includes An annular fixed blade (1) having an inner ring of fixed teeth (111) and an outer ring of fixed teeth (112); An annular movable knife (2) having an inner ring movable tooth (211) and an outer ring movable tooth (212) of a shape and size matching the shape and size; A movable knife rotating disk (311) is installed in the annular fixed knife (1) and is driven to rotate back and forth, and the annular movable knife (2) is installed on the movable knife rotating disk; and a base (4) on which the annular fixed knife (1) and the movable knife rotating disk (311) are assembled to form a hair trimming structure in which the two are arranged up and down; The base (4) comprises a main body (411), a sunken accommodating cavity (412) on the main body (411), a plurality of hollow spring mounting posts (416) on the accommodating cavity (412), and a lower convex post (317) corresponding to the spring mounting posts (416) one by one on the rotating disk frame (312) of the movable knife rotating disk (311); the height of the rotating disk frame (312) from the spring mounting posts (416) is greater than the height of the lower convex post (317); and a spring (8) having one end extending into the spring mounting post (416) and the other end being sleeved outside the lower convex post (317) is provided between the corresponding spring mounting posts (416) and the lower convex post (317).

2. A reciprocating hair trimmer head according to claim 1, characterized in that: The hair trimmer also includes a fixed 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 connected and fixed to the base (4), and clamps the annular movable knife (2) to rotate back and forth at a rotation angle of 1-29 degrees.

3. A reciprocating hair trimmer head according to claim 2, characterized in that: The fixed blade inner ring cover (5) comprises a circular cover body (511) and a retaining ring (513) arranged along the lower part of the circular cover body (511); The retaining ring (513) is provided with a plurality of rotating disk frame movable clamping openings (514) distributed at intervals; After the movable knife rotating disk (311) is triggered to rotate, the rotating disk frame (312) of the movable knife rotating disk (311) rotates in the corresponding rotating disk frame movable clamping opening (514) and is clamped by the edge of the rotating disk frame movable clamping opening (514) to achieve a rotation angle of 1-29 degrees for the movable knife rotating disk (311).

4. A reciprocating hair trimmer head according to claim 3, characterized in that: The fixed blade inner ring cover (5) further comprises a plurality of cover body plug-in hooks (512) distributed at equal intervals below the retaining ring (513); The rotating disk skeleton (312) divides the movable knife rotating disk (311) into hollow areas (313) whose number is the same as the cover body plug-in hooks (512) and are distributed circumferentially. The cover body plug-in hooks (512) pass through their corresponding hollow areas (313) and are connected and fixed to the base (4).

5. The reciprocating hair trimmer head according to claim 3, characterized in that: The upper surface of the rotating disk skeleton (312) is provided with positioning upper protrusions / positioning upper protrusions distributed at intervals in the circumferential direction, and the annular movable knife (2) is provided with a positioning area for forming an insertion fit therewith; The lower surface of the rotating disk frame (312) is provided with a pair of rotating trigger blocks (314) arranged at intervals; The reciprocating hair trimmer head also includes a horizontal rotating bar (315), which is horizontally rotatably mounted on the base (4) and one end of which is between the rotating trigger blocks (314). 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 forward and backward.

6. A reciprocating hair trimmer head according to claim 5, characterized in that: The opposing surfaces of the two rotating trigger blocks (314) are convex arc surfaces (316); The horizontal rotation bar (315) includes a rotation trigger block toggle end (6) at one end and two passive trigger ends (7) at the other end. The passive trigger ends (7) are subjected to force to drive the horizontal rotation bar (315) to rotate. The outer end of the rotating trigger block toggle end (6) is a cylinder (611) whose height is the same as the height of the rotating trigger block (314), and the width of the portion where the rotating trigger block toggle end (6) is connected to the cylinder (611) is smaller than the diameter of the cylinder (611); The toggling contact between the rotating trigger block (314) and the rotating trigger block toggling end (6) 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, characterized in that: The base (4) comprises stoppers (414) which are distributed in a circle and arranged at intervals on the accommodating cavity (412); The number of the stoppers (414) is the same as the number of the cover card insertion hooks (512), and each of the stoppers (414) is provided with a card hole (415) for inserting and fixing a cover card insertion hook (512); The upper edge of each stopper (414) forms a support bar (413); the support bar (413) supports the annular movable knife (2) so that its teeth are closely attached to the teeth of the annular fixed knife (1).

8. A reciprocating hair trimmer head according to claim 7, characterized in that: The plurality of hollow spring mounting columns (416) are on the accommodating cavity (412) outside the stopper (414), and 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).

9. The reciprocating hair trimmer head according to claim 1, characterized in that: The annular fixed blade (1) comprises Ring base (113), annular blade (114), and at least two supporting parts (115) are provided between the annular base (113) and the annular blade (114) so ​​as to form a plurality of circumferential empty areas between the annular base (113) and the annular blade (114); the outer ring fixed teeth (112) are distributed at intervals along the outer ring circumference of the annular blade (114); the inner ring fixed teeth (111) are distributed at intervals along the inner ring circumference of the annular blade (114); and the diameter of a circle enclosed by the edges on the outermost ends of the outer ring fixed teeth (112) is greater than the inner diameter of the annular base (113).

10. The reciprocating hair trimmer head according to claim 1, characterized in that: The rotating cutting edge of the inner ring moving tooth (211) is located on one side of the inner ring moving tooth (211) or on both sides 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) or on both sides of the outer ring moving tooth (212); in addition, the rotating cutting edges formed by the inner ring moving tooth (211) and the outer ring moving tooth (212) that are paired inside and outside are located on the same side or on both sides.

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