CN114012790A

CN114012790A - Magnetic suspension type trimming head and shaving device

Info

Publication number: CN114012790A
Application number: CN202111472466.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: ZHEJIANG HAISHUN ELECTRICAL CO Ltd
Current assignee: ZHEJIANG HAISHUN ELECTRICAL CO Ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-02-08

Abstract

The invention relates to a magnetic suspension type trimming head and a shaving device, which are characterized in that two magnetic blocks are arranged between a movable cutter and a fixed cutter, the two magnetic blocks are in homopolar opposite directions and are fixed in the end surfaces of the movable cutter and the fixed cutter at intervals respectively, and the homopolar repulsion force of the two magnetic blocks is less than or equal to the buckling pressure applied to a movable cutter seat by a torsional force arm of a double torsion spring; and the moving knife and/or the static knife is/are provided with an adjusting device for adjusting the interval between the two magnetic blocks. The invention has the advantages that two magnetic blocks with the same poles facing each other are added between the movable knife and the static knife, the repulsion force which is less than or equal to the torsional buckling pressure applied by the double torsional springs to the movable knife seat is generated by the same poles facing each other of the two magnetic blocks to weaken the joint retaining force of the movable knife and the static knife, the friction force between the movable knife and the static knife is reduced, the temperature rise and the working noise between the movable knife and the static knife are reduced, and the use comfort of the trimming knife head is improved.

Description

Magnetic suspension type trimming head and shaving device

Technical Field

The invention relates to a hair trimming tool, in particular to a magnetic suspension type trimming head used on a shaving device.

Background

The trimming head of the existing hair clipper or shaver mainly comprises a static knife, a static knife holder, a movable knife holder and a pressure spring, wherein the static knife is fixed on the static knife holder, one end of the movable knife is connected with the movable knife holder, the other end of the movable knife is pressed by the pressure spring to enable the movable knife to be attached to the end face of the static knife, and a driving mechanism is linked with the movable knife holder and drives the movable knife to horizontally swing along the static knife in a reciprocating manner.

Because the current move the sword all withhold on quiet sword terminal surface through two torsional springs basically, though can guarantee to move the terminal surface laminating of sword and quiet sword like this, guarantee the hair trimming benefit of trimming the sword head, but receive the pressure influence of two torsional springs, move the sword along the terminal surface reciprocating swing in-process of quiet sword, move the frictional force of the laminating terminal surface of sword and quiet sword great, make the temperature rise of moving sword and quiet sword too fast and too high and noise at work higher, influence the use comfort level of trimming the sword head.

Disclosure of Invention

To solve the above technical problems; the invention provides a magnetic suspension type trimming head and a shaving device, wherein the trimming head not only can ensure the trimming effect of a movable cutter and a fixed cutter, but also can effectively reduce the extrusion force of a double torsional spring on the movable cutter and the fixed cutter so as to reduce the friction force between the movable cutter and the fixed cutter and reduce the temperature rise and the working noise of the trimming head.

In order to solve the technical problems, the magnetic suspension type trimming knife head adopts the technical scheme that the magnetic suspension type trimming knife head comprises a static knife with knife teeth and a movable knife, wherein the movable knife is connected with a movable knife seat, the movable knife seat is in linkage connection with a driving mechanism, a double torsion spring is fixed on the static knife, and a torsional arm of the double torsion spring is buckled on the movable knife seat to enable the static knife and the movable knife to be attached; two magnetic blocks are arranged between the movable knife and the static knife, the two magnetic blocks are oppositely homopolar and are fixed in the end faces of the movable knife and the static knife at intervals, and the repulsion force of the homopolar magnetic blocks is less than or equal to the buckling pressure exerted on the movable knife base by the torsion arm of the double torsion spring; and the moving knife and/or the static knife is/are provided with an adjusting device for adjusting the interval between the two magnetic blocks.

Preferably, the two magnetic blocks are respectively a moving magnetic block and a static magnetic block; the movable magnetic block and the static magnetic block are respectively fixed with the corresponding movable magnetic groove and the static magnetic groove in an interference fit manner, wherein the movable magnetic block is positioned right above the static magnetic block and arranged in opposite directions at intervals in the same polarity; the length of the static magnetic block is larger than that of the movable magnetic block, and the two sides of the movable knife are vertically aligned with the two sides of the static magnetic block respectively when the movable knife horizontally reciprocates along the static knife.

Preferably, the adjusting device is an adjusting screw arranged on the movable knife, the adjusting screw is in threaded connection with the movable knife, and the end face of the adjusting screw is arranged in the movable magnetic groove and is in contact with the end face of the movable magnetic sheet.

Preferably, the double torsion springs are arranged on the adjusting seat, the torsion force arms at two sides of the double torsion springs are respectively buckled and pressed on the movable knife seat to enable the movable knife to be attached to the end face of the static knife, and the positioning torsion arms of the double torsion springs are abutted and press-fitted with the pressing plate arranged on the static knife; the adjusting seat is rotatably pivoted on the static knife and can drive the torsion arm of the double torsion springs to extend or contract forwards under the action of external force so as to adjust the overlapping distance of the knife teeth of the movable knife and the static knife.

Preferably, the static knife comprises a static knife holder and a static knife blade, one end of the static knife blade is inserted into the static knife holder and fixedly connected with the static knife holder, and the pressing plate is arranged on the static knife holder and integrated with the static knife holder; the adjusting seat is rotatably arranged on the static knife seat and can rotate along the static knife seat under the action of external force.

Preferably, a rotating shaft is arranged on the bottom end face of the adjusting seat, a torsion spring groove is arranged on the upper end face of the adjusting seat, and adjusting plates with adjusting shafts are respectively arranged at two ends of the torsion spring groove; a pivoting groove is formed in one side, located on the pressing plate, of the static cutter seat, baffles with sliding grooves are arranged at two ends of the pivoting groove, the rotating shaft is arranged in the pivoting groove, and two ends of the rotating shaft are clamped into the sliding grooves; the double torsion springs are arranged in the torsion spring grooves, torsion force arms on two sides of the double torsion springs are buckled and pressed on the movable cutter holder respectively, and the positioning torsion arms are in abutting and press fit with the pressing plate to enable the adjusting seat to rotate along the pin joint groove of the static cutter holder when the adjusting shaft of the adjusting plate is stirred by external force and to be fixedly pressed with the static cutter holder.

Preferably, the bottom end face of the adjusting seat is a plane, and the rotating shaft is semicircular and is fixed at the edge of the bottom end face of the adjusting seat and is integrated with the adjusting seat into a whole; the semicircular rotating shaft at the bottom end face of the adjusting seat is arranged in the pin joint groove of the static tool apron, and the bottom end face at the other side is attached to the end face of the static tool apron, so that the adjusting seat can only rotate along one side of the rotating shaft.

Preferably, the static blade comprises a blade tooth part, a connecting part and an inserting part, the end surface of the connecting part is lower than the end surfaces of the blade tooth part and the inserting part, so that the blade tooth part and the inserting part are attached to the movable blade, and the static magnetic groove is arranged on the connecting part; the inserting part is provided with an open limiting groove and a clamping groove, and the clamping groove is arranged on two sides of the limiting groove and is arranged on the end face of the static blade, which is contacted with the static tool rest; the side walls of the two sides of the limit groove are respectively provided with a first insertion sheet with the thickness smaller than that of the insertion part; the two sides of the upper pressure plate of the static cutter holder are respectively provided with a first insertion groove, and the first insertion piece is inserted into the first insertion groove to enable a clamping block arranged on the static cutter holder to be clamped into the clamping groove to fix the insertion part of the static cutter on the static cutter holder.

Preferably, the side walls of the two sides of the insertion part are provided with second insertion pieces with thickness smaller than that of the insertion part, the two sides of the static cutter holder are respectively provided with a surrounding plate, each surrounding plate is respectively provided with a clamping hook and a second insertion groove, and the second insertion pieces are inserted into the second insertion grooves to enable the insertion part to be clamped and fixed with the static cutter holder.

Preferably, the movable knife is provided with a reverse buckling groove, and one side of the reverse buckling groove is provided with a through hole communicated with the reverse buckling groove; the movable blade seat is provided with a hook plate which is vertical to the movable blade seat, and the hook plate extends into the through hole and is hooked and connected with the inverted groove to enable the movable blade to be connected with the movable blade seat in a linkage manner.

Preferably, the reversing groove is arranged in the movable magnetic groove, the cutter tooth is arranged at the front end of the movable cutter, sliding blocks are arranged on two sides of the tail end of the movable cutter, and the cutter tooth and the sliding blocks respectively protrude out of the end face of the movable cutter and are respectively attached to the cutter tooth part and the inserting part of the stationary cutter; a plurality of positioning columns are respectively arranged on two sides of the linkage block; the tail end of the movable knife is provided with a linkage groove and a positioning hole, the linkage block is arranged in the linkage groove, and each positioning column is respectively inserted into the corresponding positioning hole to ensure that the movable knife is in linkage connection with the movable knife base.

On the basis of the technical scheme, the applicant also provides a shaving device which comprises the magnetic suspension type trimming head.

The invention has the beneficial effects that:

1. the fit retaining force of the movable knife and the static knife is weakened by adding two magnetic blocks with the same poles facing each other between the movable knife and the static knife and utilizing the repulsion force of the torsion buckling pressure applied to the movable knife seat by the double torsion springs generated by the same poles facing each other of the two magnetic blocks, the friction force between the movable knife and the static knife is reduced, the temperature rise between the movable knife and the static knife, the working noise and the working current are reduced, and the use comfort of the trimming knife head is improved.

2. The interval between the two magnetic blocks is adjusted by the adjusting device, so that the homopolar repulsion force generated by the two magnetic blocks and the torsional buckling pressure exerted on the movable knife base by the torsional force arm of the double torsional spring reach or approach a critical state, the friction force between the movable knife and the stationary knife is reduced, the temperature rise and the working noise are reduced, the phenomenon of hair clamping or knife jumping can be avoided, and the working stability of the trimming knife head is improved.

3. When the torsional force and the magnetic force of the double torsion springs or the magnetic blocks are attenuated, the adjusting device can adjust the interval between the magnetic blocks, and the influence on the trimming effect and the trimming benefit of the trimming cutter head caused by the separation of the end surfaces of the movable cutter and the static cutter due to the attenuation of the torsional force of the double torsion springs and the magnetic force of the magnetic blocks is effectively avoided.

Drawings

FIG. 1 is a three-dimensional structure diagram of a magnetic floating trimming head according to an embodiment of the present invention

FIG. 2 is a side view of the magnetic floating trimming head according to the embodiment of the present invention

FIG. 3 is a perspective view of a stationary knife according to an embodiment of the present invention

FIG. 4 is a perspective view of a stationary blade holder according to an embodiment of the present invention

FIG. 5 is a rear perspective view of a stationary blade according to an embodiment of the present invention

FIG. 6 is a front perspective view of a stationary blade according to an embodiment of the present invention

FIG. 7 is a perspective view of an adjusting base according to an embodiment of the present invention

FIG. 8 is a perspective view of a movable tool post according to an embodiment of the present invention

FIG. 9 is a front perspective view of the movable blade in the embodiment of the present invention

FIG. 10 is a perspective view of the back of the moving blade in the embodiment of the present invention

Detailed Description

The embodiments of the invention will be further explained with reference to the drawings in which:

as shown in fig. 1-10, the present invention is a magnetic floating type trimming head, which comprises a static knife 1 with knife teeth and a moving knife 2, wherein the moving knife 2 is connected with a moving knife base 3, the moving knife base 3 is connected with a driving mechanism in a linkage way, a double torsion spring 4 is fixed on the static knife 1, and a torsion arm 41 of the double torsion spring is buckled and pressed on the moving knife base 3 to enable the moving knife 2 to be attached to the static knife 1; most of the existing trimming knife heads utilize two torsion force arms 41 of a double torsion spring 4 to buckle and press a movable knife 2 and a static knife 1 on a movable knife holder 3 so as to ensure the trimming effect of the hair knife; but also some trimming knife heads adopt an elastic sheet to press the movable knife seat 3 to ensure that the movable knife 2 is jointed with the static knife 1; the friction force between the movable knife 2 and the static knife 1 is increased by adopting the double torsion spring 4 or the elastic sheet, so that the temperature rise and the working noise between the movable knife 2 and the static knife 1 are improved, and the use comfort of the trimming knife head is influenced. In view of this, the technical scheme is that two magnetic blocks 6 are arranged between the movable knife 2 and the stationary knife 1, the two magnetic blocks 6 are in the same polarity, face to face and are fixed in the end faces of the movable knife 2 and the stationary knife 1 at intervals, respectively, and the repulsion force of the same polarity of the two magnetic blocks 6 is less than or equal to the buckling pressure applied to the movable knife base 3 by the torsion arm 41 of the double torsion spring 4; the moving knife 2 and/or the static knife 1 are/is provided with an adjusting device 5 for adjusting the interval between the two magnetic blocks 6. As well known, when the positioning torsion arm 42 of the double torsion spring 4 is fixed, the larger the included angle between the torsion arm 41 at the two ends of the double torsion spring and the positioning torsion arm 42 is (when the double torsion spring is horizontally installed, it can also be considered that the higher the torsion arm 41 is lifted), the larger the torsion force generated by the torsion arm 41 is; and the larger the spacing between the two pieces of magnetic blocks 6, the smaller the repulsive force of the same poles thereof, and vice versa. Therefore, the applicant introduces the magnetic blocks into the trimming blade head under the above-mentioned mechanical change law, and utilizes the two opposite magnetic blocks 6 with the same poles installed between the movable blade 2 and the stationary blade 1 to make the repulsive force generated by the two opposite magnetic blocks 6 with the same poles form a thrust from inside to outside to the movable blade 2, and the thrust is less than or equal to the torsional buckling pressure applied to the movable blade base 3 by the torsional force arm 41 of the double torsion spring 4, so that the bonding holding force between the movable blade 2 and the stationary blade 1 can be reduced, and when the bonding holding force is reduced, the friction force between the movable blade 2 and the stationary blade 1 can be correspondingly reduced, thereby reducing the temperature rise and the working noise between the movable blade 2 and the stationary blade 1, and improving the use comfort of the trimming blade head. Secondly, the double torsion springs 4 and the magnetic blocks 6 can correspondingly generate attenuation of the torsional force and the homopolar repulsion force along with the time, the movable knife 2 cannot be attached to the static knife 1, the hair trimming benefit of the movable knife 2 and the static knife 1 is affected, at the moment, the interval between the two magnetic blocks 6 can be reduced through the adjusting device 5 to increase the homopolar repulsion force, the repulsion force and the torsional buckling pressure are balanced to reduce the attachment retaining force of the movable knife 2 and the static knife 1, the friction force between the movable knife 2 and the static knife 1 is reduced, the temperature rise and the working noise between the movable knife 2 and the static knife 1 are reduced, and the use comfort of the trimming knife head is improved.

In the actual production or use process, the interval between the two magnetic blocks 6 is adjusted by the adjusting device 5, so that the homopolar repulsion force of the two magnetic blocks 6 and the initial torsion force of the torsion force arms 41 at the two ends of the double torsion spring 4 reach or approach a critical state, and the attaching holding force of the movable knife 2 and the fixed knife 1 is reduced to the maximum extent to reduce the friction force. If the end face of the joint of the movable knife 2 and the static knife 1 enters sundries or hair, the movable knife 2 can correspondingly move upwards to give way to a space, at the moment, the interval between the two magnetic blocks 6 is correspondingly enlarged, and the repulsion force of the same poles of the two magnetic blocks can be correspondingly weakened; meanwhile, the torsion arm 41 of the double torsion springs 4 can be lifted upwards, and the torsion arm 41 can generate larger torsion force to buckle and press the movable knife base 3, so that the phenomenon of knife jumping of the movable knife 2 in the left-right swinging process of the follow-up knife base 3 is avoided, and the hair knife trimming effect and the trimming benefit of the trimming knife head are ensured.

Of course, a plurality of sets of corresponding magnetic blocks 6 can be arranged on the movable knife 2 or the stationary knife 1, but it is only required to ensure that the repulsive force generated by the opposite polarities of the magnetic blocks 6 is less than or equal to the buckling pressure generated by the torsion arm 41 of the double torsion spring 4.

When the movable knife 2 swings left and right along the static knife 1 under the driving of the movable knife seat 3, the joint retention force between the movable knife 2 and the static knife 1 is reduced, the friction force between the movable knife 2 and the static knife 1 is reduced, the temperature rise and the working noise of the trimming knife head are reduced, and the two magnetic blocks 6 are respectively a movable magnetic block 61 and a static magnetic block 62; the opposite end surfaces of the static knife 1 and the movable knife 2 are respectively provided with a static magnetic groove 114 and a movable magnetic groove 21, the movable magnetic block 61 and the static magnetic block 62 are respectively fixed with the corresponding movable magnetic groove 21 and the static magnetic groove 114 in an interference fit manner, wherein the movable magnetic block 61 is positioned right above the static magnetic block 62 and arranged in opposite directions with the same polarity at intervals; the length of the static magnetic block 62 is greater than that of the moving magnetic block 61, and both sides of the moving blade 2 are vertically aligned with both sides of the static magnetic block 6, respectively, when the moving blade 1 horizontally reciprocates. For convenience of description, the two magnetic blocks 6 are divided into a static magnetic block 62 and a moving magnetic block 61 which are fixed on the static knife 1 and the moving knife 2 in an interference fit manner, because the static knife 1 is stationary, the moving knife 2 can swing left and right along the static knife 1 along with the moving knife holder 3, in order to ensure that the homopolar repulsion force of the static magnetic block 62 and the moving magnetic block 61 can always keep balance with the buckling pressure applied to the moving knife holder 3 by the torsion arm 41 of the double torsion spring 4, and reduce the joint maintaining force of the moving knife 2 and the static knife 1, the length of the static magnetic block 62 arranged on the static knife 1 is larger than that of the moving magnetic block 61, and the moving magnetic block 61 is positioned at the center part right above the static magnetic block 62 when being installed, when the moving knife 2 is driven by the moving knife holder 3 to swing left and right along the static knife 1, the two sides of the moving magnetic block 61 can respectively form vertical alignment with the left side of the static magnetic block 62, so that when the moving knife 2 swings left and right along the static knife 1 under the driving of the moving knife holder 3, the repulsive force between the movable magnetic block 61 and the static magnetic block 62 can also be avoided, so that the phenomenon that the retaining force of one end, attached to the fixed knife 1, of the movable knife 2 is changed due to unbalance of the repulsive force when the movable knife 2 swings left and right is avoided, the friction force is increased, and the temperature rise and the working noise between the movable knife 2 and the fixed knife 1 are improved. In actual production and use, the length of the static magnetic block 62 can also be set to be properly longer than the swinging distance between the moving magnetic block 61 itself and the left and right sides, and the width of the static magnetic block 62 can be the same as or larger than that of the moving magnetic block 61, but due to the control requirement of production cost, the length of the static magnetic block 62 is equal to the length of the moving magnetic block 61 plus the swinging distance of the two sides, and the width is the same.

In order to adjust the homopolar repulsion force between the moving magnet block 61 and the static magnet block 62 to make the torsional buckling pressure generated by the static magnet block and the torsional force arm 41 reach or approach a critical state, reduce the friction force between the moving blade 2 and the static blade 1 to the maximum extent, and reduce the temperature rise and the working noise, the adjusting device 5 is an adjusting screw arranged on the moving blade 2, the adjusting screw is in threaded connection with the moving blade 2, and the end face of the adjusting screw is arranged in the moving magnet groove 21 and is contacted with the end face of the moving magnet block 61. The movable knife 2 is provided with an adjusting screw, and the interval between the movable magnetic block 61 and the static magnetic block 62 can be adjusted to the optimal position when the product is delivered from the factory, so that the repulsive force of the magnetic block 6 and the torsion buckling pressure of the double torsion spring 4 reach or approach the critical state, and the use of a user is ensured. After the trimming knife head is used for a period of time, if the twisting force of the double torsion spring 4 or the magnetic force of the magnetic block 6 is attenuated, a user can adjust the movable magnetic block 61 by himself through the adjusting screw to force the gap between the movable magnetic block 61 and the static magnetic block 62 to be reduced so as to increase the repulsive force, thereby ensuring that the repulsive force of the magnetic block 6 and the twisting buckling pressure of the double torsion spring 4 reach or approach a critical state, reducing the friction force between the movable knife 2 and the fixed knife 1, reducing the temperature rise and the working noise of the trimming knife head, and improving the use comfort of the trimming knife head.

In order to facilitate the knife teeth to extend into the hair, the knife teeth of the prior static knife 1 are basically conical when viewed from the side, and when the hair-cutting device is used, the reserved length of the root of the hair is controlled, a double torsion spring 4 is arranged on an adjusting seat 7, torsion force arms 41 at two sides of the double torsion spring are respectively buckled and pressed on a movable knife seat 3 to enable a movable knife 2 to be attached to the end surface of the static knife 1, and a positioning torsion arm 42 of the double torsion spring 4 is abutted and press-fitted with a pressing plate 121 arranged on the static knife 1; the adjusting base 7 is rotatably pivoted to the stationary knife 1 and can drive the torsion arm 41 of the double torsion spring 4 to extend or contract forwards under the action of external force to adjust the overlapping distance between the knife teeth of the moving knife 2 and the stationary knife 1. The double torsion spring 4 is arranged on the adjusting seat 7, and the positioning torsion arm 42 is pressed against and matched with the pressing plate 121 arranged on the stationary knife 1 to fix the double torsion spring 4 in the adjusting seat 7; the adjusting seat 7 can rotate along the static knife 1 under the action of external force to control the forward extension and contraction of the torsion force arms 41 on the two sides of the double torsion springs 4, the torsion force arms 41 are buckled on the movable knife seat 3, the movable knife 2 is fixed on the movable knife seat 3, when the torsion force arms 41 extend forward under the rotation of the adjusting seat 7, the movable knife seat 3 and the movable knife 2 synchronously slide forward, so that the knife teeth of the movable knife 2 are closer to the tooth tips of the knife teeth of the static knife 1, the knife teeth of the static knife 1 are conical, the thickness of the knife teeth closer to the tooth tips of the knife teeth of the static knife 1 is smaller, and the reserved length of the root of hair is shorter when the hair is cut correspondingly. On the contrary, when adjusting seat 7 and rotating and making torsion arm 41 to adjust seat 7 one side shrink, move the knife rest 3 and move knife 2 and also can be corresponding along quiet sword 1 terminal surface to adjusting seat 7 one side and slide, at this moment, move the sword tooth of knife 2 and can be close to the sword tooth root of quiet sword 1, the thickness of sword tooth can grow, when the hair is pruned, will make the reserve length of hair root increase, realizes the regulation of hair root length.

The hair is cut by the cutting edges on the two sides of the teeth of the static cutter 1 and the movable cutter 2, and the sharp cutting edges of the teeth of the static cutter 1 and the movable cutter 2 cannot be formed by plastic materials, so that the static cutter 1 is basically made of metal materials, and part of the static cutter is made of ceramic materials. In order to reduce the production cost of the static knife 1 and facilitate the production and assembly of the static knife 1, the static knife 1 comprises a static knife seat 12 and a static knife blade 11, one end of the static knife blade 11 is inserted into the static knife seat 12 and is fixedly connected with the static knife seat 12, and a pressure plate 121 is arranged on the static knife seat 12 and is integrated with the static knife seat 12; the adjusting seat 7 is rotatably mounted on the stationary seat 12, and the adjusting seat 7 can rotate along the stationary seat 12 under the action of external force. The static knife 1 is divided into two parts to form the independent static knife seat 12 and the independent static knife blade 11, and when in production, the static knife seat 12 can be manufactured by adopting a plastic material and utilizing an integral injection molding process, so that the material production cost of the static knife 1 is reduced; due to the existence of the static knife holder 12, the material investment of the metal static knife blade 11 can be greatly reduced, and the production cost of the static knife 1 is greatly reduced.

In order to prevent the double torsion spring 4 from displacing and facilitate the rotation adjustment of the adjusting seat 7, a rotating shaft 71 is arranged on the bottom end surface of the adjusting seat 7, a torsion spring groove 72 is arranged on the upper end surface, and adjusting plates 73 with adjusting shafts 74 are respectively arranged at two ends of the torsion spring groove 72; a pivoting groove 122 is arranged on one side of the pressing plate 121 on the stationary blade holder 12, a baffle 123 with a sliding groove 124 is arranged at two ends of the pivoting groove 122, the rotating shaft 71 is arranged in the pivoting groove 122, and two ends of the rotating shaft 71 are clamped in the sliding groove 124; the double torsion springs 4 are installed in the torsion spring slots 72, the torsion arms 41 on both sides thereof are respectively buckled and pressed on the movable tool apron 3, and the positioning torsion arms 42 are in press fit with the pressing plate 121, so that the adjusting base 7 rotates along the pivot slots 122 of the stationary tool apron 12 and is pressed and fixed with the stationary tool apron 12 when the adjusting shaft 74 of the adjusting plate 73 is shifted by external force. Set up the torsional spring groove 72 in adjusting seat 7, just can arrange two torsional springs 4 in torsional spring groove 72 and utilize location torsion arm 42 and the clamp plate 121 of setting on quiet blade holder 12 to support the pressure and detain the pivot groove 122 of adjusting seat 7 on quiet blade holder 12 in the pressure during the equipment to in the spout 124 is gone into to pivot 71 both ends card, avoid adjusting seat 7 and rotate the adjustment in-process and take place the displacement, guarantee to adjust the job stabilization nature of seat 7. In the use process, the adjusting shafts 74 arranged on the tops of the adjusting plates 73 on the two sides of the adjusting seat 7 are connected with the adjusting mechanism of the hair shaving device, so that a user can conveniently and timely adjust the adjusting seat 7 in a rotating mode when needed.

The adjusting seat 7 only adjusts the length of the overlapping part of the cutter teeth of the movable cutter 2 and the fixed cutter 1, and the length of the cutter teeth is limited, so that the adjusting seat 7 only needs to have an adjusting function towards one side, the bottom end surface of the adjusting seat 7 is a plane, and the rotating shaft 71 is semicircular and is fixed at the edge of the bottom end surface of the adjusting seat 7 and is integrated with the adjusting seat 7; the semicircular rotating shaft 71 at the bottom end surface of the adjusting base 7 is arranged in the pivoting groove 122 of the stationary knife base 12, and the bottom end surface at the other side is attached to the end surface of the stationary knife base 12, so that the adjusting base 7 can only rotate along one side of the rotating shaft 71. The rotating shaft 71 is arranged at the edge of one side of the bottom end face of the adjusting seat 7, so that when the rotating shaft 71 is arranged in the pivot groove 122 on the static knife holder 12, the bottom end face of the adjusting seat 7 is attached to the end face of the static knife holder 12, the adjusting seat 7 can only rotate along one side of the rotating shaft 71 under the action of external force, namely, the distance between the knife teeth of the movable knife 2 and the knife teeth of the static knife 1 can be shortened through rotation, and the length of the overlapping part of the two knife teeth is increased.

In order to reduce the contact area between the moving blade 2 and the stationary blade 11 and reduce the friction force and the temperature rise of the blade head, the stationary blade 11 comprises a blade tooth part 111, a connecting part 112 and an inserting part 113, the end surface of the connecting part 112 is lower than the end surfaces of the blade tooth part 111 and the inserting part 113, so that the blade tooth part 111 and the inserting part 113 are attached to the moving blade 2, and a static magnetic groove 114 is arranged on the connecting part 112; the static blade 11 is divided into three parts, so that the blade tooth parts 111 and the inserting parts 113 at two ends are in contact with the movable blade 2, the contact area between the movable blade 2 and the static blade 11 can be obviously reduced, when the contact area is reduced, the frictional resistance is reduced, and the temperature rise is correspondingly reduced. Secondly, the end face of the connecting part 112 in the middle of the static blade 11 is provided with the blade tooth part 111 and the inserting part 113 which are lower than the two ends, so that the static magnetic block 62 can be conveniently installed, the space structure is optimized, and the opposite interval installation of the same poles of the static magnetic block 62 and the movable magnetic block 61 is ensured. An open limiting groove 1131 and a clamping groove 1132 are arranged on the insertion part 113, and the clamping groove 1132 is arranged on two sides of the limiting groove 1131 and is arranged on the end face of the static blade 11, which is in contact with the static blade holder 12; the side walls of the two sides of the limit groove 1131 are respectively provided with a first inserting piece 1133 with the thickness smaller than that of the inserting part 113; first insertion grooves 125 are respectively formed in two sides of the upper pressing plate 121 of the stationary blade holder 12, and the first insertion piece 1133 is inserted into the first insertion groove 125 to insert the latch 126 of the stationary blade holder 12 into the latch groove 1132, so as to fix the insertion portion 113 of the stationary blade 11 to the stationary blade holder 12. And set up the joint groove 1132 of spacing groove 1131 on grafting portion 113, set up the fixture block 126 of card income spacing groove 1131 in the relevant position department of quiet blade holder 12, utilize fixture block 126 to avoid quiet blade 11 to break away from mutually with quiet blade holder 12, guarantee the firm in connection degree of quiet blade 11, and come to restrict grafting portion 113 through joint groove 1132 and first grafting piece 1133, prevent that quiet blade 11 from taking place the horizontal hunting, guarantee the job stabilization nature of quiet blade 11.

In order to prevent the fixed blade 11 from shaking and affecting the working stability of the fixed blade 11, the sidewalls at both sides of the insertion portion 113 are provided with second insertion pieces 1134 having a thickness smaller than the thickness of the insertion portion 113, the two sides of the fixed blade holder 12 are respectively provided with enclosing plates 127, each enclosing plate 127 is respectively provided with a hook 128 and a second insertion groove 129, and the second insertion pieces 1134 are inserted into the second insertion grooves 129 to fix the insertion portion 113 and the fixed blade holder 12 in a clamping manner. The second inserting pieces 1134 are additionally arranged on two sides of the inserting portion 113, and the second inserting pieces 1134 are clamped with the second inserting grooves 129 on two sides of the static blade holder 12, so that the connecting firmness of the inserting portion 113 and the static blade holder 12 can be further ensured, and the working stability of the static blade 11 is greatly improved. The hook 128 is for hooking connection to the body of the hair shaving device to facilitate the mounting of the trimming head.

In order to ensure the synchronous linkage of the movable knife 2 and the movable knife holder 3 and facilitate the assembly, a back-off groove 22 is arranged on the movable knife 2, and a through hole 23 communicated with the back-off groove 22 is arranged on one side of the back-off groove 22; the movable blade holder 3 is provided with a hook plate 31 perpendicular to the movable blade holder 3, and the hook plate 31 extends into the through hole 23 and is hooked and connected with the inverted groove 22 to make the movable blade 2 and the movable blade holder 3 connected in a linkage manner. The undercut groove 22 is arranged at the bottom of the movable magnetic groove 21 on the movable blade 2, when the hair clipping device is assembled, the hook plate 31 on the movable blade base 3 is vertically inserted into the through hole 23 on the movable blade 2, and then the movable blade base 3 or the movable blade 2 is rotated to enable the hook plate 31 on the hook plate 31 to be attached to the undercut groove 22 on the movable blade 2, so that when the movable blade base 3 swings left and right, the movable blade 2 can be synchronously linked with the movable blade base 3 under the limitation of the hook plate 31 and the undercut groove 22, and the hair clipping effect of the movable blade 2 and the static blade 11 is ensured.

In order to ensure the connection firmness of the movable blade 2 and the movable blade seat 3, prevent the separation of the movable blade 2 and the movable blade seat 3 from influencing the hair trimming effect of the movable blade 2, reduce the contact area between the movable blade 2 and the stationary blade 11, reduce the friction force between the movable blade 2 and the stationary blade 1 and the temperature rise of the trimming blade head, the back-off groove 22 is arranged in the movable magnetic groove 21, the blade teeth are arranged at the front end of the movable blade 2, the sliding blocks 24 are arranged at two sides of the tail end of the movable blade 2, the blade teeth and the sliding blocks 24 respectively protrude out of the end surface of the movable blade 2 and are respectively attached to the blade tooth part 111 and the insertion part 113 of the stationary blade 1, the blade teeth at the front end of the movable blade 2 and the sliding blocks 24 at the tail end are contacted with the blade tooth part 111 and the insertion part 113 of the stationary blade 11, the contact area between the movable blade 2 and the stationary blade 11 is greatly reduced, the friction resistance is correspondingly reduced, and the temperature rise and the working noise are reduced; in order to ensure the linkage and connection firmness of the movable knife 2 and the movable knife base 3, a plurality of positioning columns 33 are respectively arranged on two sides of a linkage block 32 which is protruded on the movable knife base 3; the tail end of the movable knife 2 is provided with a linkage groove 25 and a positioning hole 26, a linkage block 32 is arranged in the linkage groove 25, and each positioning column 33 is inserted into the corresponding positioning hole 26 respectively to make the movable knife 2 and the movable knife holder 3 connected in a linkage manner. The linkage block 32 and the positioning column 33 arranged on the movable knife holder 3 are matched with the linkage groove 25 and the positioning hole 26 on the movable knife 2, so that the connection firmness of the movable knife 2 and the movable knife holder 3 can be ensured, and the working stability of the movable knife 2 is improved; meanwhile, the separation of the movable knife 2 and the movable knife seat 3 can be effectively avoided, the synchronization of the left and right swinging of the movable knife and the movable knife seat is ensured, and the hair trimming effect of the movable knife 2 and the static knife 1 is improved. In order to prevent the torsion arm 41 of the double torsion spring 4 from being separated from the movable knife base 3, two of the positioning posts 33 are provided with counter bores, and the end part of the torsion arm 41 is inserted into the counter bores.

A shaving device comprises the magnetic suspension type trimming cutter head. The shaving apparatus may be a hair clipper or a shaver.

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

Claims

1. The magnetic suspension type trimming knife head comprises a static knife with knife teeth and a movable knife, wherein the movable knife is connected with a movable knife base, the movable knife base is in linkage connection with a driving mechanism, a double torsion spring is fixed on the static knife, and a torsional force arm of the double torsion spring is buckled and pressed on the movable knife base to enable the movable knife to be attached to the static knife; the device is characterized in that two magnetic blocks are arranged between the movable knife and the static knife, the two magnetic blocks are in the same polarity, are opposite and are fixed in the end faces of the movable knife and the static knife at intervals, and the repulsion force of the same polarity of the two magnetic blocks is less than or equal to the buckling pressure applied to the movable knife base by the torsion arm of the double torsion spring; and the moving knife and/or the static knife is/are provided with an adjusting device for adjusting the interval between the two magnetic blocks.

2. The magnetic levitation trimming head according to claim 1, wherein the two magnetic blocks are a moving magnetic block and a static magnetic block; the movable magnetic block and the static magnetic block are respectively fixed with the corresponding movable magnetic groove and the static magnetic groove in an interference fit manner, wherein the movable magnetic block is positioned right above the static magnetic block and arranged in opposite directions at intervals in the same polarity; the length of the static magnetic block is larger than that of the movable magnetic block, and the two sides of the movable knife are vertically aligned with the two sides of the static magnetic block respectively when the movable knife horizontally reciprocates along the static knife.

3. A magnetic suspension trimming head according to claim 1 or 2, wherein the adjusting means is an adjusting screw provided on the movable blade, the adjusting screw is in threaded connection with the movable blade and the end surface thereof is placed in the movable magnetic groove and contacts with the end surface of the movable magnetic blade.

4. The magnetic suspension type trimming head according to claim 1, wherein the double torsion springs are mounted on the adjusting seat, the torsion arms at two sides of the double torsion springs are respectively buckled and pressed on the movable knife seat to enable the movable knife to be attached to the end surface of the stationary knife, and the positioning torsion arms of the double torsion springs are pressed against and press-fitted with a pressing plate arranged on the stationary knife; the adjusting seat is rotatably pivoted on the static knife and can drive the torsion arm of the double torsion springs to extend or contract forwards under the action of external force so as to adjust the overlapping distance of the knife teeth of the movable knife and the static knife.

5. The magnetic suspension type trimming head according to claim 1, wherein the static knife comprises a static knife holder and a static knife blade, one end of the static knife blade is inserted into the static knife holder and fixedly connected with the static knife holder, and the pressing plate is arranged on the static knife holder and integrated with the static knife holder; the adjusting seat is rotatably arranged on the static knife seat and can rotate along the static knife seat under the action of external force.

6. A magnetic levitation trimming head according to claim 4 or 5, wherein the bottom end face of the adjusting base is provided with a rotating shaft, the upper end face is provided with a torsion spring groove, and two ends of the torsion spring groove are respectively provided with an adjusting plate with an adjusting shaft; a pivoting groove is formed in one side, located on the pressing plate, of the static cutter seat, baffles with sliding grooves are arranged at two ends of the pivoting groove, the rotating shaft is arranged in the pivoting groove, and two ends of the rotating shaft are clamped into the sliding grooves; the double torsion springs are arranged in the torsion spring grooves, torsion force arms on two sides of the double torsion springs are buckled and pressed on the movable cutter holder respectively, and the positioning torsion arms are in abutting and press fit with the pressing plate to enable the adjusting seat to rotate along the pin joint groove of the static cutter holder when the adjusting shaft of the adjusting plate is stirred by external force and to be fixedly pressed with the static cutter holder.

7. The magnetic levitation trimming head according to claim 6, wherein the bottom end face of the adjusting base is a plane, and the rotating shaft is semicircular and fixed at the edge of the bottom end face of the adjusting base and is integrated with the adjusting base; the semicircular rotating shaft at the bottom end face of the adjusting seat is arranged in the pin joint groove of the static tool apron, and the bottom end face at the other side is attached to the end face of the static tool apron, so that the adjusting seat can only rotate along one side of the rotating shaft.

8. The magnetic levitation trimming head according to claim 5, wherein the static blade comprises a blade tooth portion, a connecting portion and an inserting portion, the end surface of the connecting portion is lower than the end surfaces of the blade tooth portion and the inserting portion, so that the blade tooth portion and the inserting portion are attached to the movable blade, and the static magnetic slot is formed in the connecting portion; the inserting part is provided with an open limiting groove and a clamping groove, and the clamping groove is arranged on two sides of the limiting groove and is arranged on the end face of the static blade, which is contacted with the static tool rest; the side walls of the two sides of the limit groove are respectively provided with a first insertion sheet with the thickness smaller than that of the insertion part; the two sides of the upper pressure plate of the static cutter holder are respectively provided with a first insertion groove, and the first insertion piece is inserted into the first insertion groove to enable a clamping block arranged on the static cutter holder to be clamped into the clamping groove to fix the insertion part of the static cutter on the static cutter holder.

9. A magnetic suspension trimming head according to claim 8 wherein the side walls on either side of the insert portion are provided with second insert tabs having a thickness less than the thickness of the insert portion, the stationary blade support is provided with side walls on either side thereof, each side wall is provided with a hook and a second insert slot, the second insert tab is inserted into the second insert slot to engage and secure the insert portion with the stationary blade support.

10. A magnetic levitation trimming head according to claim 1, wherein the movable blade is provided with a reversing slot, and one side of the reversing slot is provided with a through hole communicated with the reversing slot; the movable blade seat is provided with a hook plate which is vertical to the movable blade seat, and the hook plate extends into the through hole and is hooked and connected with the inverted groove to enable the movable blade to be connected with the movable blade seat in a linkage manner.

11. The magnetic suspension trimming head according to claim 10, wherein the undercut groove is provided in the movable magnetic groove, the cutter teeth are provided at the front end of the movable cutter, and sliding blocks are provided at both sides of the tail end of the movable cutter, the cutter teeth and the sliding blocks respectively protrude from the end surface of the movable cutter and are respectively attached to the cutter teeth and the insertion portion of the stationary cutter; a plurality of positioning columns are respectively arranged on two sides of the linkage block; the tail end of the movable knife is provided with a linkage groove and a positioning hole, the linkage block is arranged in the linkage groove, and each positioning column is respectively inserted into the corresponding positioning hole to ensure that the movable knife is in linkage connection with the movable knife base.

12. A shaving apparatus comprising a magnetic levitation trimming head as claimed in any one of claims 1 to 11.