CN216992025U

CN216992025U - Tool bit adjusting device and hair clipper

Info

Publication number: CN216992025U
Application number: CN202122944838.4U
Authority: CN
Inventors: 李丐腾; 苏锦军; 张磊
Original assignee: Shanghai Flyco Electrical Appliance Co Ltd
Current assignee: Shanghai Flyco Electrical Appliance Co Ltd
Priority date: 2021-10-25
Filing date: 2021-11-26
Publication date: 2022-07-19
Anticipated expiration: 2031-11-26

Abstract

The utility model relates to the technical field of hair clippers, in particular to a cutter head adjusting device and a pair of hair scissors. The utility model provides a tool bit adjusting device which comprises a tool bit adjusting device, a cutter head and a cutter head, wherein the tool bit adjusting device comprises a push frame, a pitch piece, a tooth-shaped sliding groove with a plurality of gears and an elastic piece; the festival degree piece is followed profile of tooth spout unidirectional sliding, and the one end of festival degree piece articulates in pushing away the frame, and the elastic component sets up in pushing away between frame and the festival degree piece, and both ends are connected respectively in pushing away the frame and the festival degree piece, and the elastic component is arranged in driving to make the festival degree piece support tightly in the gear of profile of tooth spout. When the section piece is driven by external power to slide along the tooth-shaped sliding groove, the section piece can be tightly propped against the gear of the tooth-shaped sliding groove due to the elastic force provided by the elastic piece, so that the section piece is tightly clung to the gear of the tooth-shaped sliding groove and impacts the groove bottom of the tooth-shaped sliding groove to generate clear and pleasant rhythm sound, the gear at each step of the section piece is easy to judge, and the section piece can reversely self-lock due to the unidirectional sliding of the section piece along the tooth-shaped sliding groove, so that the section piece is not easy to jump.

Description

Tool bit adjusting device and hair clipper

Technical Field

The utility model relates to the technical field of hair clippers, in particular to a cutter head adjusting device and a pair of hair scissors.

Background

In modern households, haircut is a fashionable pronoun, generally, in the recognition of the public, haircut needs to go to a barber shop, and with the improvement of living standard, consumers not only go to the barber shop to shape hair, but also buy a household hair clipper to cut hair for their family.

In the hair cutting process, the hair cutting length needs to be adjusted, and in the prior art, most of hair clippers are provided with a cutter head adjusting mechanism, so that the length of hair left in the hair cutting process is adjusted by adjusting the relative positions of a movable blade and a fixed blade. At present, a hair clipper is mainly provided with a cutter head adjusting mechanism in a clipper body, a push rod is arranged in the clipper body and is in transmission fit with a movable cutter blade, and when the hair clipper is used, a push key outside a shell is pushed to drive the push rod to drive the movable cutter blade to move up and down, so that the position of the movable cutter blade is adjusted.

However, when the push rod is driven by the push key to move and shift gears, gear shifting and gear inaccuracy cannot be sensed due to no gear feeling, and meanwhile, gear skipping and other phenomena are easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a cutter head adjusting device and a pair of hair scissors, and the cutter head adjusting device and the pair of hair scissors are used for solving the technical problems that gear switching cannot be sensed and gears are inaccurate due to no gear sense, and gear skipping is easy to occur.

The utility model provides a cutter head adjusting device which comprises a push frame, a pitch piece, a tooth-shaped sliding groove with a plurality of gears and an elastic piece, wherein the push frame is arranged on the front end of the tooth-shaped sliding groove;

the section degree piece slides along the tooth-shaped sliding groove in a one-way mode, one end of the section degree piece is hinged to the pushing frame, the elastic piece is arranged between the pushing frame and the section degree piece, two ends of the elastic piece are connected to the pushing frame and the section degree piece respectively, and the elastic piece is used for driving the section degree piece to abut against the gear of the tooth-shaped sliding groove.

As a further technical scheme, the cutter head adjusting device further comprises a push switch and a locking key, the push switch is connected with the push frame, and the locking key is connected with the indexing piece and can move between a locking position and an unlocking position;

when the locking key is located at the locking position, the pitch piece abuts against the gear of the tooth-shaped sliding groove;

when the locking key is located at the unlocking position, the pitch piece is separated from the tooth-shaped sliding groove.

As a further technical scheme, the section piece comprises a connecting plate and a limiting block;

one end of the connecting plate is hinged to the pushing frame, one side of the connecting plate is connected with the elastic piece, the other side of the connecting plate is provided with the limiting block, and the limiting block can be tightly propped against the gear of the tooth-shaped sliding groove and can slide along the tooth-shaped sliding groove in a one-way manner;

the locking key is connected with the limiting block.

As a further technical scheme, a first boss is arranged on the locking key, a first through hole is arranged on the tooth-shaped sliding chute, and the first through hole extends along the sliding direction of the limiting block;

the first boss penetrates through the first through hole and is connected to the limiting block.

As a further technical scheme, a rotating shaft is arranged on the connecting plate, and two limiting grooves which correspond to each other are arranged on the pushing frame;

two ends of the rotating shaft are respectively embedded in the two limiting grooves.

As a further technical scheme, the limiting block is provided with a guide arc surface used for sliding along the tooth-shaped sliding groove.

As a further technical scheme, a second boss is arranged on the locking key, a guide groove is formed in the push switch, and the second boss is arranged in the guide groove.

As a further technical solution, the locking key is moved from the locking position to the unlocking position by the push switch;

or, a second through hole is formed in the push switch, and one end of the locking key penetrates through the second through hole to be connected to the section member.

As a further technical scheme, the cutter head adjusting device further comprises a rack with a plurality of gears, and a sliding block matched with the rack is arranged on the pushing frame;

the gears of the rack correspond to the gears of the tooth-shaped sliding groove one by one, so that when the pitch piece is tightly abutted to the gears of the tooth-shaped sliding groove, the sliding block is located in the corresponding gear of the rack.

The utility model provides a pair of hair scissors, which comprises a cutter head adjusting device.

As a further technical scheme, the multifunctional electric screwdriver further comprises a waterproof movement, a motor, a screwdriver head assembly and a shell;

the cutter head assembly is arranged at the front end of the shell, the waterproof movement is arranged in the shell, the motor is arranged in the waterproof movement, and the cutter head adjusting device is arranged on the shell and used for adjusting the distance between the teeth of the cutter head assembly.

As a further technical scheme, a sliding groove is formed in the waterproof machine core, and the pushing frame is connected to the sliding groove in a sliding mode.

As a further technical scheme, the device also comprises a motor cover and an eccentric shaft, wherein the motor cover is arranged between the motor and the eccentric shaft, and the shaft of the motor is connected with the eccentric shaft;

an oil storage tank is arranged on the motor cover.

As a further technical scheme, a hasp is arranged on the motor cover, a third boss is arranged on the motor, and the hasp is connected to the third boss.

Compared with the prior art, the cutter head adjusting device and the hairdressing station provided by the utility model have the technical advantages that:

the utility model provides a tool bit adjusting device which comprises a tool bit adjusting device, a cutter head and a cutter head, wherein the tool bit adjusting device comprises a push frame, a pitch piece, a tooth-shaped sliding groove with a plurality of gears and an elastic piece; the section degree piece slides along the tooth-shaped sliding groove in a one-way mode, one end of the section degree piece is hinged to the pushing frame, the elastic piece is arranged between the pushing frame and the section degree piece, the two ends of the elastic piece are connected to the pushing frame and the section degree piece respectively, and the elastic piece is used for driving the section degree piece to abut against the gear of the tooth-shaped sliding groove.

When the section piece is driven by external power to slide along the tooth-shaped sliding groove, the section piece can be tightly abutted in the gear of the tooth-shaped sliding groove due to the elastic force provided by the elastic piece, so that the section piece is tightly attached to the gear of the tooth-shaped sliding groove and collides with the groove bottom of the tooth-shaped sliding groove to generate clear and pleasant rhythm sound, the gear at each step of the section piece is easy to judge, and the section piece can be reversely self-locked due to the unidirectional sliding of the section piece along the tooth-shaped sliding groove and is not easy to jump; when reverse gear withdrawing is needed, because one end of the node degree piece is hinged with the pushing frame, the node degree piece is driven to compress the elastic piece, so that the node degree piece is separated from the tooth-shaped sliding groove to reversely withdraw the gear, the structure is simple, and the use is convenient.

The hair clipper provided by the utility model comprises the cutter head adjusting device, so that the technical advantages and effects achieved by the hair clipper comprise the technical advantages and effects achieved by the cutter head adjusting device, and the technical advantages and effects are not described in detail herein.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural view of a hair clipper provided in the embodiment of the present invention;

FIG. 2 is an exploded view of a hair clipper according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a push switch according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a locking key according to an embodiment of the present invention;

FIG. 5 is a schematic view of the interior of the upper cover according to the embodiment of the present invention;

fig. 6 is a schematic structural diagram of a waterproof movement according to an embodiment of the present invention;

fig. 7 is a sectional view of a waterproof movement provided in an embodiment of the present invention.

An icon: 1-covering the upper cover; 11-a toothed chute; 12-a rack; 13-perforating; 2-push switch; 21-a second via; 22-a guide groove; 23-buckling; 3-a locking key; 31-a pressing part; 32-a second boss; 33-a first boss; 4-a spring; 5-section member; 51-a limiting block; 52-axis of rotation; 6-pushing the frame; 61-a fixed block; 62-a limit groove; 63-a pusher arm; 64-a slide block; 7-a waterproof movement; 71-a sliding groove; 72-a hasp; 73-a third boss; 74-soft rubber oil storage tank; 8-a cutter head assembly; 81-torsion spring frame.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be apparent that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model is described in further detail below by means of specific embodiments and with reference to the attached drawings.

The specific structure is shown in fig. 1 to 7.

The embodiment provides a cutter head adjusting device, which comprises a cutter head adjusting device, a cutter head adjusting device and a cutter head adjusting device, wherein the cutter head adjusting device comprises a push frame 6, a pitch piece 5, a tooth-shaped sliding chute 11 with a plurality of gears and an elastic piece;

degree of festival piece 5 is followed profile of tooth spout 11 unidirectional sliding, and the one end of degree of festival piece 5 articulates in pushing away frame 6, and the elastic component sets up in pushing away between frame 6 and the degree of festival piece 5, and both ends are connected respectively in pushing away frame 6 and degree of festival piece 5, and the elastic component is arranged in driving to make degree of festival piece 5 support tightly in the gear of profile of tooth spout 11.

When the section piece 5 is driven by external power to slide along the tooth-shaped sliding groove 11, the section piece 5 can be tightly abutted to the gear of the tooth-shaped sliding groove 11 due to the elastic force provided by the elastic piece, so that the section piece 5 is tightly attached to the gear of the tooth-shaped sliding groove 11 and collides with the groove bottom of the tooth-shaped sliding groove 11 to generate clear and pleasant rhythm sound, the gear at each step of the section piece 5 is easy to judge, and the section piece 5 can be reversely self-locked due to the unidirectional sliding of the section piece 5 along the tooth-shaped sliding groove 11 and is not easy to jump; when reverse gear withdrawing is needed, as one end of the pitch piece 5 is hinged with the pushing frame 6, the pitch piece 5 is driven to compress the elastic piece, so that the pitch piece 5 is separated from the tooth-shaped sliding groove 11, and the reverse gear withdrawing can be realized.

In the optional technical scheme of this embodiment, tool bit adjusting device still includes push switch 2 and locking key 3, push switch 2 is connected in pushing away frame 6, when pushing away push switch 2 forward, drive and push away frame 6 together and move forward, make degree piece 5 slide forward along profile of tooth spout 11, locking key 3 is connected in degree piece 5, when locking key 3 is not pressed, locking key 3 is located the latched position, namely, the elastic component drives degree piece 5 and supports tightly in the gear of profile of tooth spout 11, make degree piece 5 can slide along profile of tooth spout 11, press locking key 3, locking key 3 is located the unlocked position, namely press locking key 3 and drive degree piece 5 around its pin joint orientation one side that has the elastic component, make degree piece 5 and profile of tooth spout 11 separate, so, can realize reverse gear shifting through pushing away push switch 2 backward. The gear switching is realized through the locking key 3 and the push switch 2, the structure is simple, and the operation is convenient.

In an optional technical solution of this embodiment, the section 5 includes a connecting plate and a limiting block 51; the right end of the connecting plate is hinged to the pushing frame 6, one side of the connecting plate, which faces away from the toothed chute 11, is connected with the elastic piece, one side of the connecting plate, which faces towards the toothed chute 11, is provided with a limiting block 51, the limiting block 51 is matched with the toothed chute 11, wherein the elastic piece drives the connecting plate to abut against the toothed chute 11 around the hinged point under the action of elastic force, so that the limiting block 51 abuts against the gear of the toothed chute 11, and when the push switch 2 pushes forwards, the limiting block 51 slides forwards along the toothed chute 11 to realize gear switching, and meanwhile, the limiting block 51 generates clear and pleasant rhythm sound with the gear in the gear switching process. The locking key 3 is connected to the limiting block 51, and the limiting block 51 is separated from the toothed chute 11 by pressing the locking key 3, so that gear shifting can be realized.

In this embodiment, the elastic member is a spring 4, and the spring 4 has a good elastic effect and a low cost, but is not limited to this, and may also be another structure having elasticity, wherein the pushing frame 6 is provided with a fixing block 61, one end of the spring 4 is fixed on the fixing block 61, and the other end is fixed on the connecting plate.

Further, a first boss 33 is arranged on the locking key 3, and a first through hole is arranged on the tooth-shaped sliding chute 11 and extends along the sliding direction of the limiting block 51; the first boss 33 passes through the first through hole and is connected to the stopper 51. Through first boss 33 and stopper 51 are connected, and when pressing locking key 3, first boss 33 drive stopper 51 and profile of tooth spout 11 separation, simple structure, when promoting push switch 2 simultaneously, first boss 33 can remove along the direction of promotion in first through-hole, and first through-hole has the limiting displacement to first boss 33 on the one hand, and on the other hand makes locking key 3 can follow push switch 2 and moves.

In an optional technical scheme of this embodiment, the connecting plate is provided with a rotating shaft 52, and the pushing frame 6 is provided with two corresponding limiting grooves 62; both ends of the rotating shaft 52 are fitted in the two limit grooves 62, respectively.

In this embodiment, the rear end of the connecting plate is provided with the protruding rotation axis 52 of both sides, pushes away and is provided with two spacing grooves 62 that match with the rotation axis 52 of both sides on the frame 6, and the setting that the rotation axis 52 corresponds is in spacing groove 62, and can rotate in spacing groove 62, realizes the connecting plate and pushes away the articulated of frame 6.

In the optional technical solution of this embodiment, the limiting block 51 is provided with a guiding arc surface for sliding along the tooth-shaped sliding groove 11.

In this embodiment, the front end of the limiting block 51 is provided with a guide arc surface, the groove wall of the arc surface corresponding to the tooth-shaped sliding groove 11 is an inclined surface or a surface with a radian, and the guide arc surface is matched with the tooth-shaped sliding groove 11, so that the limiting block 51 can slide forwards along the tooth-shaped sliding groove 11 through the guide arc surface, the rear end of the limiting block 51 can limit the limiting block 51 to slide backwards along the tooth-shaped sliding groove 11, and the limiting block 51 is matched with the tooth-shaped sliding groove 11 to realize reverse self-locking and prevent sliding.

In an optional technical solution of this embodiment, the locking key 3 is provided with a second boss 32, the push switch 2 is provided with a guide groove 22, and the second boss 32 is disposed in the guide groove 22.

In this embodiment, first boss 33 is located the middle part of locking key 3, second boss 32 is provided with two, and be located the both ends of locking key 3 respectively, be provided with two guide ways 22 on the push switch 2, second boss 32 sets up in guide way 22, when pressing locking key 3, second boss 32 slides in guide way 22, prevent locking key 3 at the in-process displacement of pressing, it is unbalanced to lead to being used in the power on stopper 51, the effect that makes first boss 33 drive stopper 51 break away from profile of tooth spout 11 is not good.

In an optional technical solution of this embodiment, the locking key 3 is disposed below the push switch 2, and includes a pressing portion 31, the pressing portion 31 is pressed by the push switch 2 by pressing the push switch 2, so as to drive the locking key 3 to move, and the locking key 3 moves from the locking position to the unlocking position;

or, the push switch 2 is provided with the second through hole 21, one end of the locking key 3 passes through the second through hole 21 and is connected to the pitch piece 5, the other end is located outside the push switch 2, the part located outside is provided with the pressing part 31, the locking key 3 moves axially along the second through hole 21 to realize the movement between the locking position and the unlocking position, when a user is not operated, the bottom of the locking key 3 is supported by the elastic force of the elastic part and is located at the locking position, and when the unlocking is needed, the user directly presses the pressing part 31 of the locking key 3, so that the first boss 33 drives the limiting block 51 to be separated from the toothed chute 11. Direct unblock through pressing locking key 3, pressure direct action is on locking key 3, and pressure conduction is effectual, and then promotes the unblock effect.

In an optional technical scheme of the embodiment, the cutter head adjusting device further comprises a rack 12 with a plurality of gears, and a sliding block 64 matched with the rack 12 is arranged on the pushing frame 6;

the gear positions of the rack 12 correspond to the gear positions of the toothed chute 11 one by one, so that when the pitch piece 5 abuts against the gear positions of the toothed chute 11, the sliding block 64 is located in the corresponding gear position of the rack 12.

In this embodiment, the rack 12 is located in the front side of the tooth-shaped sliding groove 11, and two long arms are symmetrically arranged, the pushing frame 6 includes two long arms, the inner side of each long arm is provided with a sliding block 64 matched with the rack 12, when the limiting block 51 slides along the tooth-shaped sliding groove 11 and switches the gears on the tooth-shaped sliding groove 11, the sliding block 64 slides along the rack 12 and correspondingly switches the gears on the rack 12, so that the gear sense during gear switching is improved, and gear sliding is further prevented.

The hair clipper provided by the embodiment comprises the cutter head adjusting device, so that the technical advantages and effects achieved by the hair clipper comprise the technical advantages and effects achieved by the cutter head adjusting device, and the description is omitted.

In the optional technical scheme of this embodiment, the device further comprises a waterproof movement 7, a motor, a cutter head assembly 8 and a shell; the cutter head component 8 is arranged at the front end of the shell, the waterproof movement 7 is arranged in the shell, the motor is arranged in the waterproof movement 7, and the cutter head adjusting device is arranged on the shell and used for adjusting the distance between the teeth of the cutter head component 8.

In this embodiment, the pushing frame 6, the elastic member and the pitch member 5 are located in the housing, and the cutter head assembly 8 includes a cutter head and a torsion spring frame 81, and when the pushing switch 2 is pushed to move forward, the pushing frame 6 is driven to move forward, and then the torsion spring frame 81 is driven to rotate forward along the axis, so as to drive the torsion spring on the torsion spring frame 81 to change the inter-tooth distance between the teeth of the cutter head.

Wherein, the shell includes upper cover 1 and lower cover, and the inboard of upper cover 1 is provided with profile of tooth spout 11 and rack 12, and has seted up perforation 13 on the upper cover 1, and first boss 33 is connected with stopper 51 through perforation 13, and the outside of upper cover 1 is provided with push switch 2, and push switch 2 with push away to be connected and fix on upper cover 1 through buckle 23 between the frame 6, and this is only on second boss 32 for buckle 23.

In the optional technical solution of this embodiment, a sliding groove 71 is provided on the waterproof movement 7, and the pushing frame 6 is slidably connected to the sliding groove 71.

In this embodiment, the waterproof movement 7 is provided with symmetrical sliding grooves 71, and the sliding grooves 71 extend along the moving direction of the pushing frame 6, the pushing frame 6 further includes a pair of pushing arms 63, the pushing arms 63 are slidably connected in the sliding grooves 71, so that the pushing frame 6 can slide along the sliding grooves 71, and the sliding is stable.

Among the optional technical scheme of this embodiment, still include motor cover and eccentric shaft, the motor cover sets up between motor and eccentric shaft, and the axle and the eccentric shaft of motor are connected, are provided with the oil storage tank on the motor cover.

In the embodiment, the shaft of the motor and the waterproof machine core 7 are sealed by the sealant, and when the motor works at a high speed, the oil storage tank continuously conveys lubricating oil to the shaft of the motor and the sealant so as to lubricate the sealant, so that the sealant is over-strained and fails.

In the preferred embodiment, the oil storage tank is the spiral soft rubber oil storage tank 74, so that the oil outlet effect is good.

In the optional technical scheme of this embodiment, be provided with hasp 72 on the motor cover, be provided with third boss 73 on the motor, hasp 72 is connected in third boss 73, realizes being connected of motor and motor cover, simple structure, and is fixed effectual.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The cutter head adjusting device is characterized by comprising a pushing frame (6), a section member (5), a tooth-shaped sliding chute (11) with a plurality of gears and an elastic member;

the section member (5) slides along the tooth-shaped sliding groove (11) in a one-way mode, one end of the section member (5) is hinged to the pushing frame (6), the elastic member is arranged between the pushing frame (6) and the section member (5), two ends of the elastic member are respectively connected to the pushing frame (6) and the section member (5), and the elastic member is used for driving the section member (5) to be tightly abutted to the gear of the tooth-shaped sliding groove (11).

2. A cutter head adjustment device according to claim 1, further comprising a push switch (2) and a locking key (3), the push switch (2) being connected to the push frame (6), the locking key (3) being connected to the indexing member (5) and being movable between a locked position and an unlocked position;

when the locking key (3) is located at the locking position, the indexing piece (5) abuts against the gear of the tooth-shaped sliding groove (11);

when the locking key (3) is located at the unlocking position, the pitch piece (5) is separated from the tooth-shaped sliding groove (11).

3. Cutter head adjustment device according to claim 2, wherein the indexing member (5) comprises a connecting plate and a stop block (51);

one end of the connecting plate is hinged to the pushing frame (6), one side of the connecting plate is connected with the elastic piece, the other side of the connecting plate is provided with the limiting block (51), and the limiting block (51) can be abutted against the gear of the tooth-shaped sliding groove (11) and can slide along the tooth-shaped sliding groove (11) in a single direction;

the locking key (3) is connected to the limiting block (51).

4. The cutter head adjusting device according to claim 3, wherein the locking key (3) is provided with a first boss (33), the tooth-shaped sliding groove (11) is provided with a first through hole, and the first through hole extends along the sliding direction of the limiting block (51);

the first boss (33) penetrates through the first through hole and is connected to the limiting block (51).

5. A cutter head adjusting device according to claim 3, characterized in that the connecting plate is provided with a rotating shaft (52), and the pushing frame (6) is provided with two corresponding limiting grooves (62);

two ends of the rotating shaft (52) are respectively embedded in the two limiting grooves (62).

6. Cutter head adjusting device according to claim 3, characterized in that the stop block (51) is provided with a guiding arc for sliding along the toothed sliding groove (11).

7. Cutter head adjusting device according to claim 2, wherein the locking key (3) is provided with a second boss (32), the push switch (2) is provided with a guide groove (22), and the second boss (32) is arranged in the guide groove (22).

8. A cutter head adjustment device according to claim 2, wherein the locking key (3) is moved from a locked position to an unlocked position by the push switch (2);

or, a second through hole (21) is formed in the push switch (2), and one end of the locking key (3) penetrates through the second through hole (21) to be connected to the section member (5).

9. Cutter head adjusting device according to any one of claims 1 to 8, characterized in that the cutter head adjusting device further comprises a rack (12) having a plurality of gear positions, and a slide block (64) cooperating with the rack (12) is arranged on the push frame (6);

the gears of the rack (12) correspond to the gears of the toothed chute (11) one by one, so that when the pitch piece (5) abuts against the gears of the toothed chute (11), the sliding block (64) is located in the corresponding gear of the rack (12).

10. A hair clipper, comprising the bit adjustment device of any one of claims 1-9.

11. The hair clipper according to claim 10, further comprising a waterproof movement (7), a motor, a cutter head assembly (8) and a housing;

the utility model discloses a waterproof machine tool, including shell, tool bit subassembly (8), waterproof core (7), motor, head adjusting device, head subassembly (8) set up in the front end of shell, waterproof core (7) set up in the shell, the motor set up in waterproof core (7), head adjusting device sets up on the shell for adjust the intertooth space distance of tool bit subassembly (8).

12. The hair clipper according to claim 11, characterized in that the waterproof movement (7) is provided with a sliding groove (71), and the pushing frame (6) is slidably connected to the sliding groove (71).

13. The hair clipper according to claim 11, further comprising a motor cover and an eccentric shaft, the motor cover being disposed between the motor and the eccentric shaft, and a shaft of the motor being connected to the eccentric shaft;

an oil storage tank is arranged on the motor cover.

14. The hair clipper according to claim 13, wherein a buckle (72) is provided on the motor cover, a third boss (73) is provided on the motor, and the buckle (72) is connected to the third boss (73).