Electric hair cutter adjusting tool bit limited by elastic swing arm

Abstract

The electric hair cutter adjusting tool bit limited by the elastic swing arm comprises a fixed cutter and a movable cutter assembly, the movable cutter assembly comprises a movable cutter, a movable cutter base, the long-strip-shaped swing arm, a fixing screw and a nut, an avoiding groove is formed in the bottom of the movable cutter and / or the top of the fixed cutter, and the nut is arranged in the avoiding groove; the movable cutter is provided with a movable cutter hole, the movable cutter holder is provided with a cutter holder hole, the swing arm is provided with a swing arm hole, and the fixing screw sequentially penetrates through the swing arm hole, the cutter holder hole and the movable cutter hole to be fixedly connected with the nut, so that the movable cutter assembly is fixed into an integrated structure; the swing arm is arranged to replace a traditional guide block and guide groove matching structure, so that noise generated by the guide block and the guide groove is effectively avoided; and meanwhile, the distance between the cutter heads of the movable cutter and the fixed cutter is adjusted in a sliding adjustment mode of the fixing screw and the movable cutter assembly, the structure is simple, adjustment is convenient and fast, and the practicability of the cutter heads and the use experience of a user are further improved.

Description

Technical Field

[0001] The utility model belongs to the field of electric hair clippers, and in particular relates to an electric hair clipper with an elastic swing arm limiting adjusting blade head. Background Art

[0002] In daily life, electric clippers are commonly used hair cutting and hairdressing tools, mainly used to trim human hair or animal hair. At present, the market usually uses reciprocating electric clipper heads, and most of these cutter head structures are slidably matched with the guide groove of the fixed blade and the guide block on the moving blade, which can be specifically referred to Chinese patent No. CN202223128190.4, so as to achieve rapid reciprocating movement of the cutter head.

[0003] However, the sliding fit between the guide groove and the guide block will generate friction. During the continuous friction, not only a gap will be formed between the two, but the gap will also continue to expand. When the gap expands to a certain extent, the guide block will become unbalanced left to right or front to back in the guide groove; when used again, due to the existence of the gap, the guide block will collide with the inside of the guide groove and generate a lot of noise.

[0004] In order to solve the noise caused by the imbalance phenomenon, an interference fit between the guide groove and the guide block is usually adopted. However, the interference fit further increases the load current during use, which not only consumes power faster, but also greatly reduces the service life of the cutter head. At the same time, the cutter heads using this structure type on the market almost all have the same problem. When the noise is too loud, users often need to buy new cutter heads for replacement. Therefore, excessive noise, short service life and large load current seriously restrict the use of electric clippers, and cannot provide users with good use cost and use experience. Utility Model Content

[0005] (1) Technical issues to be solved

[0006] The utility model provides an adjustable blade head of an electric hair clipper with elastic swing arm limit, aiming to solve the problems of short service life, high noise and high load current of the existing blade head structure of guide blocks and guide grooves.

[0007] (2) Technical solution

[0008] The utility model provides an adjustable blade head of an electric hair clipper with an elastic swing arm limit, comprising a fixed blade and a movable blade assembly, wherein the movable blade assembly is arranged above the fixed blade and can swing back and forth relative to the fixed blade, the movable blade assembly comprises a movable blade, a movable blade seat, a long swing arm, a fixing screw and a nut, a avoiding groove is arranged at the bottom of the movable blade and / or the top of the fixed blade, and the nut is arranged in the avoiding groove; the movable blade is provided with a movable blade hole, the movable blade seat is provided with a blade seat hole, and one end of the swing arm is provided with a swing arm hole, the fixing screw passes through the swing arm hole, the blade seat hole and the movable blade hole in sequence and is connected and fixed to the nut, so that the movable blade assembly is fixed into an integrated structure; wherein, when the fixing screw is loosened, the position of the movable blade and the movable blade seat can be adjusted forward and backward; a fixing seat is also arranged at one side above the fixed blade, the bottom of the fixing seat is detachably connected to the top of the fixed blade, and the other end of the swing arm is connected to the fixing seat.

[0009] Furthermore, a T-shaped slot is provided at the bottom of the fixing seat, and one end of the swing arm connected to the fixing seat is provided with a T-shaped portion corresponding to the T-shaped slot, and the T-shaped portion is clamped in the T-shaped slot.

[0010] Furthermore, a square first slot is provided on the top of the movable knife seat, an opening is provided at one end of the first slot close to the fixed seat, a block portion corresponding to the shape of the first slot is provided at one end of the swing arm, the block portion is arranged in the first slot, and the inner wall of the first slot abuts against the left and right side walls of the block portion; the knife seat hole is arranged in the first slot, and the swing arm hole is arranged in the block portion.

[0011] Furthermore, the front-to-back length L4 of the inner wall of the first slot is greater than the front-to-back length L5 of the block portion, and the front-to-back length L41 of the inner wall of the tool holder hole is greater than the front-to-back length L6 of the fixing screw, so that the tool holder hole can be slidably adjusted forward and backward relative to the block portion and the fixing screw.

[0012] Furthermore, the nut includes a limiting portion at the top and a base at the bottom, the front-to-back length L1 and the left-to-right width W1 of the limiting portion are respectively smaller than the front-to-back length L2 and the left-to-right width W2 of the base, and a step structure is formed at the junction of the two.

[0013] Furthermore, the left and right width W3 of the inner wall of the movable knife hole is smaller than the left and right width W2 of the base; when the limiting portion is arranged in the movable knife hole, the movable knife hole abuts against the left and right side walls of the limiting portion, and the top surface of the base abuts against the bottom surface of the movable knife.

[0014] Furthermore, the front-to-back length L3 of the inner wall of the movable knife hole is greater than the front-to-back length L1 of the limiting portion, so that the limiting portion can be slidably adjusted back and forth in the movable knife hole.

[0015] Furthermore, a second slot is provided on the top of the movable knife seat, a torsion spring is provided in the fixed seat, and a pressure foot of the torsion spring is pressed against the second slot to keep the movable knife seat and the movable knife in close contact with the fixed knife.

[0016] Furthermore, the front-to-back length L7 of the inner wall of the second slot is greater than the front-to-back length L8 of the contact point between the presser foot and the second slot, so that the presser foot of the torsion spring can be slidably adjusted in the second slot.

[0017] Furthermore, a driving seat is provided on the movable blade seat, and a driving groove for use with a motor and an eccentric needle of the electric hair clipper is provided in the driving seat.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The swing arm replaces the traditional matching structure of the guide block and the guide groove, thereby effectively avoiding the noise generated by the guide block and the guide groove, and the problem of short service life of the cutter head due to friction loss between the guide block and the guide groove; at the same time, the cutter head spacing between the moving knife and the fixed knife is adjusted by fixing the screw and sliding the moving knife assembly. The structure is simple and the adjustment is convenient, which further improves the practicality of the cutter head and the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a side view of the utility model.

[0022] Figure 3 It is an overall exploded view of the utility model.

[0023] Figure 4 It is an exploded view of the movable knife assembly of the utility model.

[0024] Figure 5 The utility model is a top view Figure 1 .

[0025] Figure 6 The utility model is a top view Figure 2 .

[0026] Figure 7 The utility model is a top view Figure 3 .

[0027] Figure 8 It is a bottom view of the fixing seat of the utility model.

[0028] Fig. 9 This is a schematic diagram of the nut structure of the utility model.

[0029] Fig.10For this utility model Figure 1 Local section view with C2 line as the cutting line.

[0030] Fig.11 The utility model shows the cooperation between the movable knife and the fixed knife. Figure 1 .

[0031] Fig.12 The utility model shows the cooperation between the movable knife and the fixed knife. Figure 2 .

[0032] Fig.13 It is a schematic diagram of the cooperation between the swing arm and the movable knife seat of the utility model.

[0033] Fig.14 For this utility model Figure 1 Cross-sectional view of the swing arm and movable tool holder with C1 line as the cutting line.

[0034] Figure markings: 1-fixed knife, 11-avoidance groove, 2-moving knife assembly, 21-moving knife, 211-moving knife hole, 22-moving knife seat, 221-knife seat hole, 222-first slot, 223-opening, 224-second slot, 225-driving seat, 2251-driving slot, 23-swing arm, 231-swing arm hole, 232-T-shaped portion, 233-block portion, 24-fixing screw, 25-nut, 251-limiting portion, 252-base, 253-step, 3-fixed seat, 31-T-slot, 4-torsion spring, 41-presser foot, 42-contact point, 5-connecting screw. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] In order to more clearly express the technical solutions of the utility model and the embodiments, as Figure 1 As shown, the reciprocating swing direction of the movable knife 21 is defined as left and right, and the adjustment direction of the movable knife 21 is front and back;

[0037] It should be noted that the directions or positional relationships indicated by “front and back”, “left and right”, etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the utility model.

[0038] like Figure 1-7As shown, the utility model provides an electric hair clipper with an elastic swing arm limit adjustment blade head, including a fixed blade 1 and a movable blade assembly 2, the movable blade assembly 2 is arranged above the fixed blade 1 and can perform left and right reciprocating swinging motion relative to the fixed blade 1, the movable blade assembly 2 includes a movable blade 21, a movable blade seat 22, a swing arm 23, a fixing screw 24 and a nut 25 corresponding to the fixing screw 24, the bottom of the movable blade 21 and / or the top of the fixed blade 1 is provided with an avoidance groove 11, the nut 25 is arranged in the avoidance groove 11, the movable blade 21, the movable blade seat 22 and one end of the swing arm 23 A movable knife hole 211, a knife seat hole 221 and a swing arm hole 231 corresponding to the fixing screw 24 are respectively provided. During installation, the fixing screw 24 passes through the swing arm hole 231, the knife seat hole 221 and the movable knife hole 211 in sequence and is threadedly fixedly connected with a nut 25 arranged in the avoidance groove 11, so that the movable knife assembly 2 is fixed into an integrated structure; a fixing seat 3 is also provided on one side above the fixed knife 1, and the fixing seat 3 is detachably connected to the fixed knife 1, and the other end of the swing arm 23 is connected to the fixing seat 3, so that the movable knife assembly 2 is fixed above the fixed knife 1;

[0039] Preferably, the fixing seat 3 is threadedly fixedly connected to the fixed knife 1 via a connecting screw 5;

[0040] When the movable knife assembly 2 swings back and forth relative to the fixed knife 1, since one end of the swing arm 23 is connected to the swinging movable knife seat 22 and the other end is connected to the stationary fixed seat 3, the swing arm 23 will be deformed and form a supporting force for the movable knife assembly 2 during the reciprocating motion of the movable knife assembly 2; at the same time, the elastic force generated by the deformation of the swing arm 23 will also prompt the movable knife assembly 2 to perform a reverse reset motion; through the setting of the swing arm 23, the reciprocating swing of the movable knife assembly 2 has a limiting and supporting effect. Compared with the cooperation of the traditional guide groove (not shown) and the guide block (not shown), the setting of the swing arm 23 is not only simple to install, but also has a better silent effect when performing reciprocating swing, and can also effectively improve the service life of the knife head.

[0041] Specifically, the swing arm 23 is in the shape of a long strip;

[0042] Furthermore, if Figure 8 As shown, in order to improve the installation convenience of the swing arm 23, a T-shaped slot 31 is provided at the bottom of the fixing seat 3, and one end of the swing arm 23 connected to the fixing seat 3 is provided with a T-shaped portion 232 corresponding to the T-shaped slot 31. When in use, the T-shaped portion 232 is clamped in the T-shaped slot 31 and is fixed by connecting the bottom of the fixing seat 3 with the top of the fixed knife 1, thereby realizing the fixation of one end of the swing arm 23;

[0043] It should be noted that the arrangement of the T-slot 31 and the T-shaped portion 232 is not the only matching scheme of the present invention. The fixing seat 3 and one end of the swing arm 23 may also be an integrally formed structure; or an axle pin (not shown) is provided at the bottom of the fixing seat 3, and a shaft sleeve (not shown) is provided at one end of the swing arm 23 and sleeved on the axle pin, thereby fixing the swing arm 23. Therefore, any connection and fixing structure for the swing arm 23 and the fixing seat 3 falls within the protection scope of the present invention.

[0044] Preferably, the swing arm 23 is made of elastic plastic or metal.

[0045] Specifically, Figure 9-10 As shown, the nut 25 includes a limiting portion 251 at the top and a base 252 at the bottom, the front-to-back length L1 and the left-to-right width W1 of the limiting portion 251 are respectively smaller than the front-to-back length L2 and the left-to-right width W2 of the base 252, and a step 253 structure is formed at the junction of the two; the moving knife hole 211 of the moving knife 21 corresponds to the left and right side walls of the limiting portion 251, and the left-to-right width W3 of the inner wall of the moving knife hole 211 is smaller than the left-to-right width W2 of the base 252, so when installed, the limiting portion 251 is arranged in the moving knife hole 211, and the inner wall of the moving knife hole 211 abuts against the left and right side walls of the limiting portion 251, and the top surface of the base 252 abuts against the bottom surface of the moving knife 21;

[0046] Furthermore, the front-to-back length L3 of the inner wall of the movable knife hole 211 is greater than the front-to-back length L1 of the limiting portion 251, so that the limiting portion 251 can be slidably adjusted forward and backward in the movable knife hole 211, so as to increase or decrease the distance D between the blades of the movable knife 21 and the fixed knife 1, thereby achieving the purpose of adjusting the distance D between the blades of the movable knife 21 and the fixed knife 1; during installation, the blades of the movable knife 21 and the fixed knife 1 are first adjusted to appropriate positions, and then the movable knife assembly 2 is fixed by tightening the fixing screw 24 and the nut 25, thereby completing the relative fixation of the movable knife 21 and the fixed knife 1;

[0047] It should be noted that, since the length of the swing arm 23 is fixed, the positions of the fixing screw 24 and the nut 25 connected to the swing arm 23 are also fixed;

[0048] Therefore, if Figure 11-12 As shown, when the rear end A1 of the inner wall of the movable knife hole 211 abuts against the rear end B1 of the outer wall of the limiting portion 251, the distance D between the knife head of the movable knife 21 and the knife head of the fixed knife 1 is the smallest; when cutting hair, the distance between the knife head of the movable knife 21 and the skin is the shortest, so that the remaining length of the hair on the skin surface is zero or relatively short;

[0049] When the front end A2 of the inner wall of the movable knife hole 211 abuts against the front end B2 of the outer wall of the limiting portion 251, the distance D between the blade head of the movable knife 21 and the blade head of the fixed knife 1 is the largest; when cutting hair, the distance between the blade head of the movable knife 21 and the skin is the longest, so that the hair remaining on the skin surface is kept longer;

[0050] By adjusting the tightness of the fixing screw 24 and the movement and coordination of the movable knife hole 211 and the limiting portion 251, the user can adjust the distance D between the movable knife 21 and the fixed knife 1 according to actual conditions, so as to cut a specified hair length, and the adjustment method is simple, convenient and fast.

[0051] Specifically, Figure 13-14 As shown, a square first slot 222 is provided on the top of the movable knife seat 22, the knife seat hole 221 is arranged in the first slot 222, an end of the first slot 222 close to the fixed seat 3 is provided with an opening 223, and an end of the swing arm 23 connected to the movable knife seat 22 is provided with a block portion 233 corresponding to the shape of the first slot 222, and the swing arm hole 231 is arranged in the block portion 233; during installation, the block portion 233 is arranged in the first slot 222, and the inner wall of the first slot 222 abuts against the left and right side walls of the block portion 233; the setting of the first slot 222 has a limiting effect on the installation and swinging of the swing arm 23, thereby improving the supporting stability of the swing arm 23 on the reciprocating swing of the movable knife seat 22, and at the same time, it also improves the convenience of installing the swing arm 23 and the movable knife seat 22;

[0052] Furthermore, the front-to-back length L4 of the inner wall of the first slot 222 is greater than the front-to-back length L5 of the block portion 233, and the front-to-back length L41 of the inner wall of the tool holder hole 221 is also greater than the front-to-back length L6 of the fixing screw 24, so that the fixing screw 24 and the block portion 233 can be slidably adjusted forward and backward in the tool holder hole 221 and the first slot 222 respectively; during the front-to-back adjustment process of the movable knife 21, the movable knife holder 22 can be adaptively adjusted in position relative to the swing arm 23 or the fixing screw 24 and according to the position of the movable knife 21, or can be synchronously adjusted with the movable knife 21, so as to achieve better reciprocating swinging posture and adjustment convenience.

[0053] Specifically, Figure 5-7As shown, a second slot 224 is further provided on the top of the movable knife seat 22, and a torsion spring 4 is provided in the fixed seat 3. The pressure foot 41 of the torsion spring 4 is pressed in the second slot 224 and applies pressure to the movable knife seat 22 in the direction of the movable knife 21; the downward pressure of the torsion spring 4 keeps the movable knife seat 22 and the movable knife 21 in contact with the fixed knife 1; at the same time, when the movable knife assembly 2 reciprocates, the pressure foot 41 of the torsion spring 4 is deformed, and under the elastic action of the deformation of the pressure foot 41, the movable knife assembly 2 moves in the opposite direction to achieve rapid reset, and the setting of the torsion spring 4 further improves the swing speed of the movable knife assembly 2, so that the knife head has a better cutting effect;

[0054] Furthermore, the front-to-back length L7 of the inner wall of the second slot 224 is greater than the front-to-back length L8 of the contact point 42 between the presser foot 41 and the second slot 224, so that the presser foot 41 of the torsion spring 4 can slide in the second slot 224; when adjusting the front-to-back distance of the blade of the movable knife 21, the movable knife seat 22 and the movable knife 21 can move forward and backward synchronously, and the presser foot 41 of the torsion spring 4 will also move synchronously in the second slot 224 to adapt to the adjustment of the movable knife 21, thereby preventing the movable knife 21 from falling off the fixed knife 1 during the adjustment process; at the same time, during the reciprocating swing of the movable knife seat 22, the position of the contact point 42 between the movable knife seat 22 and the presser foot 41 will change relatively;

[0055] That is to say, when the movable knife assembly 2 is not swinging, the distance between the front end A3 of the presser foot 41 and the front end B3 of the second slot 224 is L9; when the movable knife assembly 2 is swinging, the distance between the front end A3 of the presser foot 41 and the front end B3 of the second slot 224 is L10; because when the movable knife assembly 2 swings, the contact point 42 between the presser foot 41 and the second slot 224 will be offset toward the rear end of the second slot 224, so the distance L9 is smaller than the distance L10.

[0056] By increasing the front-to-rear length of the inner wall of the second slot 224 , the presser foot 41 can be kept in the second slot 224 when the movable knife holder 22 reciprocates and maintains a fit force between the movable knife 21 and the fixed knife 1 on the movable knife holder 22 .

[0057] Specifically, Figure 1 As shown, the movable blade seat 22 is also provided with a driving seat 225, and a driving groove 2251 used in conjunction with an eccentric needle (not shown) is provided in the driving seat 225. The driving seat 225 is connected to a motor (not shown) of the electric hair clipper through the eccentric needle, and under the eccentric swing of the motor and the eccentric needle, the movable blade seat 22 is driven to swing back and forth synchronously, thereby driving the movable blade assembly 2 to swing back and forth relative to the fixed blade 1, thereby realizing the hairdressing operation.

[0058] The following is a detailed description of the working principle of the utility model;

[0059] During installation, the blade head is mounted on the haircutting end of the electric hair clipper, and the eccentric needle of the electric hair clipper is inserted into the driving slot 2251. After the switch of the electric hair clipper is turned on, the movable blade assembly 2 is driven by the motor and the eccentric needle to swing back and forth relative to the fixed blade 1. During the swinging, the swing arm 23 and the torsion spring 4 have a limiting and supporting effect on the swinging of the movable blade assembly 2. Under the elastic force of the swing arm 23 and the torsion spring 4, the movable blade assembly 2 is quickly reset to increase the swinging speed, thereby further improving the haircutting effect.

[0060] When it is necessary to cut the specified hair length, it is necessary to adjust the relative position of the blade head of the movable blade 21 and the blade head of the fixed blade 1, by loosening the fixing screw 24 with a screwdriver (not shown), and then pushing the movable blade 21 and / or the movable blade holder 22 forward or backward and adjusting to a suitable relative position of the movable blade 21 and the fixed blade 1, and then tightening the fixing screw 24, thereby achieving the position adjustment of the blade head of the movable blade 21 and the blade head of the fixed blade 1.

[0061] The innovation of the utility model lies in that the matching structure of the traditional guide block and guide groove is replaced by the setting of the swing arm, thereby effectively avoiding the noise generated by the guide block and the guide groove, and the problem of short service life of the cutter head due to friction loss between the guide block and the guide groove; at the same time, the cutter head spacing between the moving knife and the fixed knife is adjusted by means of sliding adjustment of the fixing screw and the moving knife assembly. The structure is simple and the adjustment is convenient, which further improves the practicality of the cutter head and the user experience.

[0062] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementations that can be understood by those skilled in the art.

[0063] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An electric hair clipper with elastic swing arm limit adjustment blade head, characterized in that: The invention comprises a fixed knife (1) and a movable knife assembly (2), wherein the movable knife assembly (2) is arranged above the fixed knife (1) and can swing back and forth relative to the fixed knife (1), the movable knife assembly (2) comprises a movable knife (21), a movable knife seat (22), a long swing arm (23), a fixing screw (24) and a nut (25), a bottom of the movable knife (21) and / or a top of the fixed knife (1) is provided with a avoiding groove (11), and the nut (25) is arranged in the avoiding groove (11); the movable knife (21) is provided with a The movable knife hole (211), the movable knife seat (22) is provided with a knife seat hole (221), and one end of the swing arm (23) is provided with a swing arm hole (231), the fixing screw (24) passes through the swing arm hole (231), the knife seat hole (221), and the movable knife hole (211) in sequence and is connected and fixed with the nut (25), so that the movable knife assembly (2) is fixed into an integrated structure; wherein, when the fixing screw (24) is loosened, the relative position of the movable knife (21) and the movable knife seat (22) can be adjusted forward and backward; A fixing seat (3) is also provided on one side above the fixed knife (1); the bottom of the fixing seat (3) is detachably connected to the top of the fixed knife (1); and the other end of the swing arm (23) is connected to the fixing seat (3).

2. According to claim 1, the electric hair clipper with elastic swing arm limit adjustment blade head is characterized in that: A T-shaped slot (31) is provided at the bottom of the fixing seat (3); one end of the swing arm (23) connected to the fixing seat (3) is provided with a T-shaped portion (232) corresponding to the T-shaped slot (31); and the T-shaped portion (232) is clamped in the T-shaped slot (31).

3. According to claim 2, the electric hair clipper with elastic swing arm limit adjustment blade head is characterized in that: A square first slot (222) is provided at the top of the movable knife seat (22); an opening (223) is provided at one end of the first slot (222) close to the fixed seat (3); a block portion (233) corresponding to the shape of the first slot (222) is provided at one end of the swing arm (23); the block portion (233) is arranged in the first slot (222), and the inner wall of the first slot (222) abuts against the left and right side walls of the block portion (233); The knife seat hole (221) is arranged in the first clamping groove (222), and the swing arm hole (231) is arranged in the block portion (233).

4. According to claim 3, the electric hair clipper with elastic swing arm limit adjustment blade head is characterized in that: The front-to-back length L4 of the inner wall of the first slot (222) is greater than the front-to-back length L5 of the block portion (233), and the front-to-back length L41 of the inner wall of the tool holder hole (221) is greater than the front-to-back length L6 of the fixing screw (24), so that the tool holder hole (221) can be adjusted to slide forward and backward relative to the block portion (233) and the fixing screw (24).

5. The electric hair clipper with elastic swing arm limit adjustment blade head according to claim 1, characterized in that: The nut (25) comprises a limiting portion (251) at the top and a base (252) at the bottom; the front-to-back length L1 and the left-to-right width W1 of the limiting portion (251) are respectively smaller than the front-to-back length L2 and the left-to-right width W2 of the base (252); and a step (253) structure is formed at the junction of the two.

6. The electric hair clipper with elastic swing arm limit adjustment blade head according to claim 5, characterized in that: The left-right width W3 of the inner wall of the movable knife hole (211) is smaller than the left-right width W2 of the base (252); when the limiting portion (251) is arranged in the movable knife hole (211), the movable knife hole (211) abuts against the left and right side walls of the limiting portion (251), and the top surface of the base (252) abuts against the bottom surface of the movable knife (21).

7. The electric hair clipper with elastic swing arm limit adjustment blade head according to claim 6, characterized in that: The front-to-back length L3 of the inner wall of the movable knife hole (211) is greater than the front-to-back length L1 of the limiting portion (251), so that the limiting portion (251) can be adjusted by sliding forward and backward in the movable knife hole (211).

8. The electric hair clipper with elastic swing arm limit adjustment blade head according to claim 1, characterized in that: A second slot (224) is provided at the top of the movable knife seat (22), a torsion spring (4) is provided in the fixed seat (3), and a pressure foot (41) of the torsion spring (4) is pressed in the second slot (224), so that the movable knife seat (22) and the movable knife (21) are kept in close contact with the fixed knife (1).

9. The electric hair clipper with elastic swing arm limit adjustment blade head according to claim 8, characterized in that: The front-to-back length L7 of the inner wall of the second slot (224) is greater than the front-to-back length L8 of the contact point (42) between the presser foot (41) and the second slot (224), so that the presser foot (41) of the torsion spring (4) can be slidably adjusted in the second slot (224).

10. The electric hair clipper with elastic swing arm limit adjustment blade head according to claim 1, characterized in that: A driving seat (225) is provided on the movable blade seat (22), and a driving slot (2251) for use with a motor and an eccentric needle of an electric hair clipper is provided in the driving seat (225).

Images