Trimming cutter head with independent floating static cutter and trimming tool

Abstract

The trimming cutter head with the independent floating static cutter and the trimming tool are characterized in that the static cutter and a static cutter holder are mutually independent, the static cutter is installed on a floating ring, the floating ring is arranged in the static cutter holder, and a gap D is formed between the outer side wall of the floating ring and the inner wall of the static cutter holder; the floating ring is radially limited relative to the static tool apron, but is movably connected with the static tool apron in an axial up-and-down displacement manner; when the static knife bears external force, the static knife at least can press the floating ring downwards to float downwards in the axial direction of the static knife holder and automatically reset when the external force disappears. The static knife has the beneficial effects that the static knife and the static knife holder are of a split structure, and when the static knife is in contact with an external contact surface, the static knife can independently float and displace downwards in the axial direction of the static knife holder under stress, so that the static knife can play a role in force splitting or force unloading, the static knife is prevented from being bent and deformed under stress, the frictional resistance of a moving knife during rotary cutting along the static knife is reduced, and the cutting efficiency is improved. The surface temperature of the static knife is prevented from being too high to scald skin, and the use comfort of the trimming knife head and the trimming tool is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a trimming device, more particularly to a trimming head with an independently floating static blade and a trimming tool, mainly applied to the field of personal care tools such as shavers, epilators and the like. BACKGROUND

[0002] The trimming head of the existing trimming tool mainly comprises a static blade, a static blade seat, a dynamic blade and a dynamic blade seat, and the static blade is basically fixed on the static blade seat. When the user holds the trimming tool and makes the trimming head contact with an external contact surface (which can be the surface of human skin or the surface of textile fabric), the static blade of the corresponding trimming head will also bear the reaction force of the external contact surface. At this time, the static blade is prone to bending deformation due to force, which greatly increases the frictional resistance between the dynamic blade and the static blade, significantly increases the surface temperature rise and working noise of the static blade, causes a burning sensation on the skin, and reduces the user's comfort. SUMMARY

[0003] In order to solve the above technical problems, the present application provides a trimming head with an independently floating static blade and a trimming tool. The trimming head can independently float axially downward relative to the static blade seat when bearing external force, which plays a role of force division or force relief, avoids the concentration of external force on the static blade, prevents the static blade from bending deformation when bearing force, reduces the frictional resistance between the dynamic blade and the static blade, improves the adhesion to the external contact surface, ensures the trimming performance, reduces the working noise and temperature rise of the trimming head, and improves the use comfort of the trimming head.

[0004] To solve the above technical problems, the technical solution adopted by the present application is a trimming head with an independently floating static blade, which comprises a static blade and a static blade seat, and a dynamic blade and a dynamic blade seat. The dynamic blade is installed on the dynamic blade seat and can always keep in contact with the static blade. The dynamic blade seat is connected with a driving mechanism and can drive the dynamic blade to move along the static blade under the driving of the driving mechanism. The static blade and the static blade seat are independent of each other, and the static blade is installed on a floating ring. The floating ring is placed in the static blade seat, and a gap is formed between the outer side wall of the floating ring and the inner wall of the static blade seat, so that the floating ring is connected with the static blade seat in a movable manner in the radial direction but can move up and down in the axial direction.

[0005] The dynamic blade seat is located below the static blade, the static blade is supported by the dynamic blade and protrudes from the static blade seat at one end, and the floating ring and the static blade seat form an upward axial limit. When the static blade bears external force, the static blade can at least press down the floating ring to float axially downward along the static blade seat and automatically reset when the external force disappears.

[0006] Preferably, a limiting structure is arranged on the outer side wall of the floating ring, and a guide structure is arranged on the inner wall of the static blade seat. The limiting structure and the guide structure cooperate to make the floating ring only float axially upward and downward when bearing force.

[0007] Preferably, the outer diameter of the moving knife holder is smaller than the inner diameter of the floating ring, and the moving knife holder is placed in the floating ring so that the moving knife supports the static knife and keeps in contact with the static knife at all times; when the static knife bears external force, the static knife presses down the floating ring, the moving knife and the moving knife holder to float and displace axially along the static knife holder.

[0008] Preferably, an annular groove is arranged on the inner wall of the floating ring, and a limiting piece is arranged on the outer side wall of the moving knife holder, the limiting piece is inserted into the annular groove so that the moving knife holder is rotatably connected with the floating ring as a whole.

[0009] Preferably, the static knife holder is in the shape of a ring, and a limiting edge extending towards the center is arranged on the upper end of the static knife holder, the diameter of the limiting edge is smaller than the diameter of the inner wall of the static knife holder.

[0010] The static knife is in the shape of a circular cover, has a faceplate in contact with the skin, and has a peripheral side wall connected with the edge of the faceplate, the other end of the peripheral side wall is connected with the floating ring as a whole; wherein,

[0011] The outer diameter of the floating ring is smaller than the inner diameter of the static knife holder so that a gap is formed between the floating ring and the static knife holder, and the outer diameter of the floating ring is larger than the diameter of the limiting edge, when the moving knife supports the static knife, the floating ring can be in contact with the limiting edge of the static knife holder to form axial upward limiting.

[0012] Preferably, a bent edge is formed on the end of the static knife connected with the floating ring, the bent edge is integrally connected with the floating ring by injection molding; or, the bent edge is integrally connected with the floating ring by welding, buckling or adhesion.

[0013] Preferably, a multi-sided pin is arranged between the output shaft of the driving mechanism and the moving knife holder, one end of the multi-sided pin is fixed on the output shaft, the other end of the multi-sided pin is inserted into a transmission hole in the moving knife holder so that the moving knife holder is at a predetermined height in the static knife holder and can rotate synchronously with the driving mechanism;

[0014] A spring piece is arranged at the bottom of the moving knife holder, the moving knife is inserted into the moving knife holder, the bottom of the moving knife is connected with the spring piece, and the moving knife keeps in contact with the static knife under the elastic force of the spring piece; when the static knife bears external force, the static knife can press down the moving knife and the floating ring to float and displace axially along the static knife holder; when the external force disappears, the spring piece can drive the moving knife to support the static knife so that the static knife and the floating ring are automatically reset.

[0015] Preferably, a spring driving member is arranged between the output shaft of the driving mechanism and the moving knife holder, one end of the spring driving member is fixed on the output shaft, the other end of the spring driving member is inserted into the moving knife holder and elastically supports the moving knife holder, so that the moving knife installed in the moving knife holder keeps in contact with the static knife at all times; when the static knife bears external force, the static knife presses down the moving knife and the floating ring so that the static knife, the moving knife, the floating ring and the moving knife holder float and displace axially along the static knife holder synchronously; when the external force disappears, the spring driving member supports the moving knife holder so that the moving knife supports the static knife and the floating ring to be automatically reset; or, the spring driving member supports the moving knife holder so that the moving knife holder drives the floating ring, the static knife and the moving knife to be automatically reset.

[0016] Preferably, the elastic driving member comprises a transmission base, a transmission sleeve, and a spring between the transmission base and the transmission sleeve; wherein,

[0017] The transmission base is cylindrical, and has a shaft hole penetrating through both ends of an upper end face, and a counterbore between the shaft hole and an outer edge, so that the upper end face of the transmission base forms an inner groove; a plurality of transmission grooves are arranged on an outer circumferential sidewall of the transmission base, and each transmission groove is arranged with one end spaced from the upper end face of the transmission base and the other end penetrating through a lower end face of the transmission base;

[0018] The transmission sleeve is annular, and has a sealing plate formed at one end port, so that the other end of the transmission sleeve forms an opening; a triangular transmission head is arranged on an outer end face of the sealing plate, and the transmission head is inserted into a limiting hole with a matching shape arranged in a positioning column of the movable cutter holder, so that the movable cutter holder is in transmission connection with the transmission sleeve;

[0019] A transmission block equal in number to the transmission grooves is arranged on an inner sidewall of the transmission sleeve, and each transmission block is clamped into a transmission groove, so that the transmission sleeve is in fixed connection with the transmission base in an axially floating displacement manner.

[0020] On the basis of the above-mentioned trimming cutter head, the application further provides a trimming tool, which comprises the above-mentioned trimming cutter head with the independently floating stationary cutter.

[0021] The application has the beneficial effect that the stationary cutter and the stationary cutter holder are in a split structure, and when the stationary cutter contacts an external contact surface, the stationary cutter can be individually axially downwardly floatingly displaced along the stationary cutter holder, so that the stationary cutter itself can play a role of force splitting or force relieving, thereby avoiding bending deformation of the stationary cutter due to force, reducing frictional resistance when the movable cutter rotates and cuts along the stationary cutter, reducing temperature rise on the surface of the stationary cutter, preventing the skin from being scalded due to excessively high temperature on the surface of the stationary cutter, and improving the use comfort of the trimming cutter head and the trimming tool. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 FIG. 1 is a perspective view of a trimming tool according to an embodiment of the application;

[0023] Figure 2 FIG. 2 is an installation cross-sectional view of the trimming tool according to the first embodiment of the application;

[0024] Figure 3 FIG. 3 is an installation cross-sectional view of the trimming tool according to the second embodiment of the application;

[0025] Figure 4 FIG. 4 is a perspective view of the stationary cutter holder according to an embodiment of the application;

[0026] Figure 5 FIG. 5 is a perspective view of the floating ring according to the first embodiment of the application;

[0027] Figure 6The third embodiment of the floating ring in the embodiment of the present application

[0028] Figure 7 The third embodiment of the floating ring in the embodiment of the present application

[0029] Figure 8 The third embodiment of the floating ring in the embodiment of the present application

[0030] Figure 9 The third embodiment of the floating ring in the embodiment of the present application

[0031] Figure 10 The third embodiment of the floating ring in the embodiment of the present application DETAILED DESCRIPTION

[0032] The following will be described in conjunction with the accompanying drawings Figures 1-10 The embodiment of the present application will be further described:

[0033] The present application is a trimming cutter head with an independently floating stationary cutter, comprising a stationary cutter 1 and a stationary cutter seat 2, and an inner thread is arranged at the bottom end of the stationary cutter seat 2 and is threadedly connected with the machine body 10 as a whole; a movable cutter 3 is installed on a movable cutter seat 4, and the bottom of the movable cutter seat 4 is connected with a driving mechanism 5, which can not only drive the movable cutter seat 4 to rotate, but also support the movable cutter seat 4 to make the movable cutter 3 always keep in contact with the stationary cutter 1.

[0034] Since the existing stationary cutter 1 is fixed on the stationary cutter seat 2, when the stationary cutter 1 is in contact with an external contact surface (the external contact surface can be the surface of human skin or the surface of textile fabric), the stationary cutter 1 will be subjected to the reaction force of the external contact surface; at this time, the stationary cutter 1 is easily deformed by bending, which will greatly increase the frictional resistance when the movable cutter 3 rotates along the stationary cutter 1 for cutting, not only making the surface temperature of the stationary cutter 1 too high to cause a burning sensation on the user's skin, but also increasing the working noise of the trimming cutter head and reducing the comfort of the trimming tool.

[0035] Therefore, the present application proposes the following technical solutions: the stationary cutter 1 and the stationary cutter seat 2 are independent of each other, and the stationary cutter 1 is installed on a floating ring 6, which is arranged in the stationary cutter seat 2 and forms a gap D between the outer side wall of the floating ring 6 and the inner wall of the stationary cutter seat 2, so that the floating ring 6 is connected with the stationary cutter seat 2 in a movable manner in the radial direction but can be displaced up and down in the axial direction; the movable cutter seat 4 is located below the stationary cutter 1 to support the stationary cutter 1 to protrude from the stationary cutter seat 2 at one end, and the floating ring 6 and the stationary cutter seat 2 form an upward axial limit, so that when the stationary cutter 1 is subjected to an external force, the stationary cutter 1 can at least press down the floating ring 6 to be displaced downward along the stationary cutter seat 2 in the axial direction and automatically reset when the external force disappears.

[0036] In the embodiment, when the static knife 1 and the static knife seat 2 are independent parts (the external contact surface can be the surface of human skin or the surface of textile fabric), the static knife 1 can be displaced axially downward along the static knife seat 2 under the reaction force, so that the static knife 1 itself can play a role of force distribution or force relief, thereby preventing the static knife 1 from being bent and deformed after being stressed, reducing the frictional resistance when the moving knife 3 rotates and cuts along the static knife 1, reducing the temperature rise on the surface of the static knife 1, preventing the skin from being scalded due to the excessively high temperature on the surface of the static knife 1, and improving the use comfort of the trimming head and the trimming tool.

[0037] The floating ring 6 is connected to the lower end of the static knife 1, so that the working stability of the static knife 1 when being displaced axially upward and downward can be improved, the static knife 1 can be prevented from being twisted due to the excessively thin thickness, and the working reliability of the static knife 1 can be ensured. In order to prevent the floating ring 6 from interfering with the axial floating displacement of the static knife 1, the outer diameter of the floating ring 6 is smaller than the inner diameter of the static knife seat 2, so that a gap D can be formed between the outer wall of the floating ring 6 and the inner wall of the static knife seat 2. At this time, when the static knife 1 is displaced axially downward along the static knife seat 2 under the force, the floating ring 6 will not interfere with the floating displacement of the static knife 1, so that the axial floating displacement of the static knife 1 is smooth; when the static knife 1 is reset, the floating ring 6 can cooperate with the end of the static knife seat 2 to limit the axial displacement of the static knife 1 at the port of the static knife seat 2.

[0038] Since the static knife 1 and the static knife seat 2 are independent parts, in order to prevent the static knife 1 from rotating along with the moving knife 3 under the influence of the frictional resistance when the moving knife 3 rotates and cuts along the static knife 1, the floating ring 6 is radially limited relative to the static knife seat 2, but can be axially displaced upward and downward and is movably connected to the static knife seat 2, so that the static knife 1 can be displaced axially downward along the static knife seat 2 after being stressed, and the role of force distribution or force relief can be achieved.

[0039] In order to realize the continuous and stable working of the trimming head, the static knife 1 can be automatically reset under the support of the moving knife 3 and the top support, or can be automatically reset when the floating ring 6 is supported by the moving knife seat 4.

[0040] To ensure that the static knife 1 can vertically float and displace axially downward along the static knife seat 2 after being stressed, prevent the static knife 1 from being deflected or twisted when floating and displacing axially downward, a limiting structure 61 is arranged on the outer wall of the floating ring 6, and a guide structure 21 is arranged on the inner wall of the static knife seat 2, the limiting structure 61 and the guide structure 21 cooperate to enable the floating ring 6 to only float and displace axially upward and downward along the static knife seat 2 when being stressed. In actual production, the limiting structure 61 and the guide structure 21 are groove-rail cooperation structures that cooperate with each other, for example, a guide rail is arranged on the inner wall of the static knife seat 2, and a guide groove is arranged on the outer wall of the floating ring 6, the guide rail is clamped into the guide groove, and the static knife 1 can be ensured to float and displace axially downward along the static knife seat 2 after being stressed. In addition, since the lower end of the static knife 1 is connected to the floating ring 6 as a whole, the static knife 1 can also be effectively prevented from rotating along the static knife seat 2 under the cooperation of the limiting structure 61 and the guide structure 21, and the working stability of the static knife 1 can be ensured. Of course, the limiting structure 61 and the guide structure 21 can also be replaced by other known structures, but since the structure of the guide rail and the guide groove is relatively simple and easy to produce and process, the guide rail and the guide groove are preferentially selected in the embodiment.

[0041] Since the static knife 1 floats and displaces axially downward along the static knife seat 2 to split force or unload force after being stressed, the static knife 1 is prevented from being bent and deformed when being stressed, and to prevent the dynamic knife seat 4 from interfering with the axial floating displacement of the static knife 1 and affecting the working stability of the axial floating displacement of the static knife 1, in the embodiment, the outer diameter of the dynamic knife seat 4 is less than the inner diameter of the floating ring 6, and the dynamic knife seat 4 is placed in the floating ring 6 so that the dynamic knife 3 supports the static knife 1 and always keeps in contact with the static knife 1; when the static knife 1 bears external force, the static knife 1 presses the floating ring 6 downward, and the dynamic knife 3 and the dynamic knife seat 4 float and displace axially downward along the static knife seat 2. By setting the outer diameter of the dynamic knife seat 4 to be less than the inner diameter of the floating ring 6, the dynamic knife seat 4 can be placed in the floating ring 6 during assembly, and when the static knife 1 floats and displaces axially downward along the static knife seat 2, the dynamic knife seat 4 will not interfere with or block the floating ring 6, thereby ensuring the working stability of the axial floating displacement of the static knife 1. In addition, when the dynamic knife seat 4 is placed in the floating ring 6, the height interval of the floating ring 6 is reduced, the dynamic knife 3 can be brought into closer contact with and support the static knife 1, the shearing force between the dynamic knife 3 and the static knife 1 is ensured, and the hair trimming performance of the trimming cutter head is improved.

[0042] In order to make the moving blade 3 and the moving blade seat 4 and the static blade 1 and the floating ring 6 synchronously float and displace axially downward along the static blade seat 2, avoid the moving blade 3 and the static blade 1 from being out of synchronization in axial floating displacement after being pressed, and cause the moving blade 3 to break the static blade 1, an annular groove 62 is arranged on the inner wall of the floating ring 6, and a limiting piece 41 is arranged on the outer side wall of the moving blade seat 4, the limiting piece 41 is inserted into the annular groove 62, and the moving blade seat 4 is rotatably connected with the floating ring 6 as a whole. By arranging the annular groove 62 on the inner wall of the floating ring 6 and arranging the limiting piece 41 on the outer side wall of the moving blade seat 4, and by clamping the limiting piece 41 into the annular groove 62 during assembly, the moving blade 3 can not only rotate along the floating ring 6 under the driving of the driving mechanism 5, so as to ensure the trimming performance of the moving blade 3 and the static blade 1, but also can make the moving blade 3 and the moving blade seat 4 combined with the static blade 1 and the floating ring 6 as a whole. When the static blade 1 is forced to float and displace axially downward along the static blade seat 2, the moving blade 3 and the moving blade seat 4 can synchronously float and displace with the static blade 1 and the floating ring 6, so as to avoid the static blade 1 from being broken by the moving blade 3 under pressure, ensure the use safety of the static blade 1, prevent the blade edge of the moving blade 3 from being damaged, and prolong the service life of the moving blade 3. In addition, after the external force acting on the static blade 1 disappears, the moving blade 3 and the moving blade seat 4 can be reset together with the static blade 1 and the floating ring 6.

[0043] In order to ensure that the static blade 1 can be assembled into the static blade seat 2 and axially float and displace after being forced, the static blade seat 2 is in the shape of a ring, and a limiting edge 22 extending towards the center is arranged on the upper end of the static blade seat 2, the diameter of the limiting edge 22 is smaller than the diameter of the inner wall of the static blade seat 2; the static blade 1 is in the shape of a circular cover, has a panel in contact with the skin, and a peripheral side wall connected with the edge of the panel, and the other end of the peripheral side wall is connected with the floating ring 6 as a whole; wherein the outer diameter of the floating ring 6 is smaller than the inner diameter of the static blade seat 2, so that a gap D is formed between the floating ring 6 and the static blade seat 2, and the outer diameter of the floating ring 6 is larger than the diameter of the limiting edge 22, and the floating ring 6 can be in contact with the limiting edge 22 of the static blade seat 2 to form an axial upward limiting when the moving blade 3 supports the static blade 1. By arranging the limiting edge 22 on the upper end of the static blade seat 2 and controlling the outer diameter of the floating ring 6 to be larger than the inner diameter of the limiting edge 22 and smaller than the inner diameter of the static blade seat 2, the static blade 1 can be inserted into the static blade seat 2 when the lower end of the static blade 1 is connected with the floating ring 6 as a whole, and the static blade 1 can pass through the limiting edge 22 and protrude out of the static blade seat 2 under the supporting force of the moving blade 3. The static blade 1 is limited axially upward by the outer diameter of the floating ring 6 being larger than the inner diameter of the limiting edge 22, so as to prevent the static blade 1 from sliding out of the upper end of the static blade seat 2, and enable the static blade 1 to axially float and displace downward along the static blade seat 2 after being forced.

[0044] In order to improve the connection reliability of the static knife 1 and the floating ring 6, and improve the working stability of the static knife 1, a bent edge 63 is formed at one end of the static knife 1 connected with the floating ring 6. The bent edge 63 can not only improve the bending resistance of the static knife 1 as a whole, prevent the static knife 1 from being twisted and deformed when it is axially downwardly displaced under stress, and improve the working stability of the static knife 1. During assembly, the bent edge 63 can be integrally connected with the floating ring 6 by injection molding. Of course, the static knife 1 and the floating ring 6 can also be integrally connected by selecting different processes according to the material of the floating ring 6. For example, when the floating ring 6 is a metal part, the bent edge 63 can be integrally welded with the surface of the floating ring 6. The bent edge 63 at the lower end of the static knife 1 can also be inserted into the annular insertion slot formed on the surface of the floating ring 6 to be integrally connected with the floating ring 6. Alternatively, the bent edge 63 of the static knife 1 can also be integrally bonded with the floating ring 6 by using adhesive material. The specific method can be determined according to the actual situation, and the present embodiment is not limited further.

[0045] In order to realize the automatic reset of the static knife 1 after it is axially downwardly displaced along the static knife seat 2 under stress, the following two embodiments are proposed in the present application.

[0046] Embodiment 1

[0047] A multi-sided pin 8 is arranged between the output shaft 51 of the driving mechanism 5 and the moving knife seat 4. One end of the multi-sided pin 8 is fixed on the output shaft 51, and the other end is inserted into the transmission hole in the moving knife seat 4 to make the moving knife seat 4 at a predetermined height in the static knife seat 2 and can rotate synchronously with the driving mechanism 5. A spring 7 is arranged at the bottom of the moving knife seat 4. The dynamic knife 3 is inserted into the moving knife seat 4, and the bottom of the dynamic knife 3 is connected with the spring 7. Under the action of the elastic force of the spring 7, the dynamic knife 3 always keeps in contact with the static knife 1. When the static knife 1 bears external force, the static knife 1 can press down the dynamic knife 3 and the floating ring 6 to be axially downwardly displaced along the static knife seat 2. When the external force disappears, the spring 7 can drive the dynamic knife 3 to support the static knife 1, so that the static knife 1 and the floating ring 6 are automatically reset.

[0048] By adding a multi-sided pin 8 between the output shaft 51 of the driving mechanism 5 and the moving knife seat 4, and fixing one end of the multi-sided pin 8 with the output shaft 51 and supporting the other end of the moving knife seat 4, the moving knife seat 4 can be at a predetermined position in the static knife seat 2 by adjusting the connection position of the multi-sided pin 8 and the output shaft 51. At this time, the dynamic knife 3 installed in the moving knife seat 4 correspondingly supports the static knife 1, so that the floating ring 6 forms a limiting fit with the limiting edge 22 in the static knife seat 2, and the static knife 1 passes through the limiting edge 22 and protrudes outside the static knife seat 2 to form an initial state.

[0049] Since the moving cutter seat 4 is supported at a predetermined height in the static cutter seat 2 by the multi-sided pin 8, and the static cutter 1 is supported by the moving cutter 3, in order to avoid the static cutter 1 being broken or the blade of the moving cutter 3 being broken after the static cutter 1 is forced, a spring 7 is arranged at the bottom of the moving cutter seat 4, and the bottom end of the moving cutter 3 abuts against the spring 7. In the initial state, the moving cutter 3 supports the static cutter 1 by the elastic force of the spring 7, so that the static cutter 1 protrudes outside the static cutter seat 2 through the limiting edge 22 and always keeps contact with the static cutter 1 to form a shearing force. When the static cutter 1 is forced, the moving cutter 3 is pressed downward and can overcome the elastic force of the spring 7, so that the moving cutter 3 is elastically displaced downward to give the static cutter 1 an axial floating to leave a buffer space, which not only can avoid the static cutter 1 being broken, but also can improve the use safety of the static cutter 1 and the moving cutter 3. At the same time, the static cutter 1 presses the moving cutter 3 to make the spring 7 elastically contract, which can also make the static cutter 1 play a role of force distribution or force relief, prevent the static cutter 1 from being bent and deformed after being forced, reduce the frictional resistance between the moving cutter 3 and the static cutter 1, reduce the temperature rise of the surface of the static cutter 1, prevent the surface of the static cutter 1 from being too high to scald the skin, and improve the use comfort of the trimming head and the trimming tool.

[0050] Embodiment 2

[0051] A spring driving piece 9 is arranged between the output shaft 51 of the driving mechanism 5 and the moving cutter seat 4, one end of the spring driving piece 9 is fixed with the output shaft 51, and the other end is inserted into the moving cutter seat 4 to elastically support the moving cutter seat 4, so that the moving cutter 3 installed in the moving cutter seat 4 always keeps contact with the static cutter 1. By additionally arranging the spring driving piece 9 between the output shaft 51 of the driving mechanism 5 and the moving cutter seat 4, one end of the spring driving piece 9 is fixedly connected with the output shaft 51 of the driving mechanism 5, and the other end is supported on the moving cutter seat 4.

[0052] And in the case that the spring driving piece 9 elastically supports the moving cutter seat 4, the following technical purposes or technical effects can be achieved:

[0053] Firstly, the spring driving piece 9 can play a role of power transmission between the moving cutter seat 4 and the output shaft 51 of the driving mechanism 5, so as to drive the moving cutter seat 4 to rotate synchronously with the output shaft 51, and realize the technical purpose that the moving cutter 3 installed on the moving cutter seat 4 rotates and cuts along the static cutter 1.

[0054] Secondly, when the spring driving piece 9 supports the moving cutter seat 4, the moving cutter seat 4 can drive the moving cutter 3 to support the static cutter 1, so that the static cutter 1 passes through the limiting edge 22 in the static cutter seat 2 and protrudes outside the static cutter seat 2. At this time, the floating ring 6 installed at the lower end of the static cutter 1 can be limited to cooperate with the limiting edge 22 to clamp the static cutter 1 at the upper end of the static cutter seat 2 to form an initial working state.

[0055] In the foregoing embodiments, two assembly structures of the moving cutter seat 4 are disclosed, i.e. the moving cutter seat 4 and the floating ring 6 are in a split structure, and the moving cutter seat 4 and the floating ring 6 are in an integrated structure. When the spring driving piece 9 is additionally arranged between the output shaft 51 of the driving mechanism 5 and the moving cutter seat 4:

[0056] As the moving knife holder 4 and the floating ring 6 are in a split structure, when the static knife 1 bears external force, the static knife 1 correspondingly presses the floating ring 6 and the moving knife 3 to move axially downward along the static knife holder 2, at this time, the moving knife 3 transmits the pressure to the moving knife holder 4, and the moving knife holder 4 correspondingly compresses the elastic driving member 9, so that the static knife 1, the floating ring 6, the moving knife 3 and the moving knife holder 4 synchronously realize the floating displacement along the axial direction of the static knife holder 2, thereby avoiding the bending deformation of the static knife 1 due to the force, reducing the frictional resistance between the moving knife 3 and the static knife 1, lowering the temperature rise of the surface of the static knife 1, preventing the skin from being scalded by the high temperature of the surface of the static knife 1, and improving the use comfort of the trimming head and the trimming tool. When the external force disappears, the elastic driving member 9 supports the moving knife holder 4, so that the moving knife 3 installed on the moving knife holder 4 stops supporting the static knife 1, forces the static knife 1 to pass through the limiting edge 22 and protrude out of the static knife holder 2, and at the same time, makes the floating ring 6 form a limiting fit with the limiting edge 22 on the static knife holder 2, thereby realizing the automatic reset of the static knife 1.

[0057] As the moving knife holder 4 and the floating ring 6 are combined into one body, when the static knife 1 bears external force, the static knife 1 correspondingly presses the floating ring 6 to move axially downward along the static knife holder 2, and since the moving knife holder 4 and the floating ring 6 are combined into one body, when the floating ring 6 moves axially along with the static knife 1, the moving knife holder 4 and the moving knife 3 also synchronously move axially downward along the static knife holder 2, the static knife 1 is bent and deformed due to the force, the frictional resistance between the moving knife 3 and the static knife 1 is reduced, the temperature rise of the surface of the static knife 1 is lowered, the skin is prevented from being scalded by the high temperature of the surface of the static knife 1, and the use comfort of the trimming head and the trimming tool is improved. When the external force disappears, the elastic driving member 9 supports the moving knife holder 4, so that the moving knife 3 installed on the moving knife holder 4 stops supporting the static knife 1, forces the static knife 1 to pass through the limiting edge 22 and protrude out of the static knife holder 2, and at the same time, makes the floating ring 6 form a limiting fit with the limiting edge 22 on the static knife holder 2, thereby realizing the automatic reset of the static knife 1 and the floating ring 6.

[0058] In order to realize the power transmission of the driving mechanism 5 and the automatic reset of the static knife 1, the elastic driving member 9 comprises a transmission base 91, a transmission sleeve 92 and a spring 93 located between the transmission base 91 and the transmission sleeve 92; the transmission base 91 is in a cylindrical shape, and an axially-through shaft hole 911 is arranged on the upper end face of the transmission base 91, the shaft hole 911 is sleeved on the output shaft 51 of the driving mechanism 5 and is fixedly connected with the output shaft 51, a counterbore is arranged between the shaft hole 911 and the outer edge, so that the upper end face of the transmission base 91 forms an inner groove 912, and when the spring 93 is assembled, it can be put into the inner groove 912.

[0059] A plurality of transmission grooves 913 are arranged on the outer circumferential side wall of the transmission base 91, each transmission groove 913 is arranged with an interval from the upper end surface of the transmission base 91 at one end and penetrates the lower end surface of the transmission base 91 at the other end; the transmission sleeve 92 is in the shape of a ring, an end opening is formed at the other end of the transmission sleeve 92 by forming a sealing plate at one end port of the transmission sleeve 92, a triangular transmission head is arranged on the outer end surface of the sealing plate, the transmission head is inserted into the limiting hole with a matched shape arranged in the positioning column of the movable cutter holder 4, so that the movable cutter holder 4 is in transmission connection with the transmission sleeve 92.

[0060] By arranging a plurality of transmission grooves 913 on the circumferential side wall of the transmission base 91 and arranging the upper end of each transmission groove 913 with an interval from the upper end surface of the transmission base 91 and the lower end in communication with the outside, during assembly, the transmission sleeve 92 can be first placed outside the transmission base 91, the transmission block 921 in the transmission sleeve 92 is clamped into the transmission groove 913 by using the lower end of the transmission groove 913, so that the transmission sleeve 92 can rotate synchronously with the transmission base 91 to realize the function of power transmission. Secondly, when the transmission sleeve 92 is placed outside the transmission base 91, one end of the spring 93 is pressed in the inner groove 912 of the transmission base 91 and the other end supports the transmission sleeve 92, because the upper end of the transmission groove 913 is arranged with an interval from the upper end surface of the transmission base 91, under the action of the spring 93, the transmission block 921 can only be limited in the transmission groove 913 in the axial upward direction, and when the cutter head assembly is subjected to skin extrusion and elastically floats and displaces in the axial downward direction of the machine body 10, the transmission sleeve 92 can elastically float and displace in the axial downward direction of the transmission base 91 under the guidance of the transmission groove 913, so as to realize the conditions of having the power transmission function, the elastic floating and automatic resetting function in the axial upward and downward directions.

[0061] On the basis of the above-mentioned trimming cutter head, the application further proposes a trimming tool, which comprises the above-mentioned trimming cutter head with the independently floating stationary cutter 1.

[0062] The trimming cutter head or trimming tool described in the above-mentioned embodiments can be a trimming cutter head or trimming tool for trimming the hair such as beard on the surface of human skin, or can be a trimming cutter head or trimming tool for trimming the pilling on the surface of textile fabric.

[0063] The above-mentioned embodiments should not be regarded as a limitation of the application, but any improvement based on the spirit of the application should be within the protection scope of the application.

Claims

1. A trimmer head with an independently floating stationary blade, comprising a stationary blade (1) and a stationary blade seat (2), a moving blade (3) and a moving blade seat (4), wherein the moving blade (3) is mounted on the moving blade seat (4) and can always maintain contact with the stationary blade (1), and the moving blade seat (4) is connected to a drive mechanism (5) and can drive the moving blade (3) to move along the stationary blade (1) under the drive of the drive mechanism (5); characterized in that The stationary knife (1) and the stationary knife seat (2) are independent of each other, and the stationary knife (1) is installed on the floating ring (6). The floating ring (6) is placed inside the stationary knife seat (2), and a gap D is formed between its outer wall and the inner wall of the stationary knife seat (2), so that the floating ring (6) is radially limited relative to the stationary knife seat (2), but is axially displaced and movablely connected to the stationary knife seat (2). The moving knife holder (4) is located below the stationary knife (1), so that the moving knife (3) supports the stationary knife (1) and one end of the stationary knife (1) protrudes out of the stationary knife holder (2), and the floating ring (6) forms an axial upper limit with the stationary knife holder (2). When the stationary knife (1) is subjected to external force, the stationary knife (1) can at least press down the floating ring (6) and float downward along the axial direction of the stationary knife holder (2) and automatically reset when the external force disappears.

2. The trimmer head with an independently floating stationary blade according to claim 1, characterized in that... A limiting structure (61) is provided on the outer wall of the floating ring (6), and a guide structure (21) is provided on the inner wall of the stationary tool holder (2). The limiting structure (61) and the guide structure (21) cooperate to make the floating ring (6) only able to float up and down along the axis of the stationary tool holder (2) when subjected to force.

3. The trimmer head with an independently floating stationary blade according to claim 1, characterized in that... The outer diameter of the moving tool holder (4) is smaller than the inner diameter of the floating ring (6), and it is placed inside the floating ring (6) so that the moving tool (3) supports the stationary tool (1) and always keeps in contact with the stationary tool (1); when the stationary tool (1) is subjected to external force, the stationary tool (1) presses down the floating ring (6), and the moving tool (3) and the moving tool holder (4) float downward along the axis of the stationary tool holder (2).

4. The trimmer head with an independently floating stationary blade according to claim 1, characterized in that... An annular groove (62) is provided on the inner wall of the floating ring (6), and a limiting piece (41) is provided on the outer wall of the moving tool holder (4). The limiting piece (41) is inserted into the annular groove (62) so that the moving tool holder (4) can be rotatably connected to the floating ring (6) as a whole.

5. The trimmer head with an independently floating stationary blade according to claim 1, characterized in that... The stationary knife holder (2) is annular, and its upper end is provided with a limiting edge (22) extending toward the center. The diameter of the limiting edge (22) is smaller than the inner wall diameter of the stationary knife holder (2). The static knife (1) is round-cap shaped, with a panel that contacts the skin and a peripheral sidewall connected to the edge of the panel. The other end of the peripheral sidewall is integrated with the floating ring (6); wherein, The outer diameter of the floating ring (6) is smaller than the inner diameter of the stationary tool holder (2), so that a gap D is formed between the floating ring (6) and the stationary tool holder (2). The outer diameter of the floating ring (6) is larger than the diameter of the limiting edge (22). When the moving tool (3) supports the stationary tool (1), the floating ring (6) can contact the limiting edge (22) of the stationary tool holder (2) to form an axial upper limit.

6. The trimmer head with an independently floating stationary blade according to claim 1, characterized in that... The end of the stationary blade (1) connected to the floating ring (6) has a bent edge (63), which is injection molded to be integral with the floating ring (6); or the bent edge (63) is welded, snapped or bonded to the floating ring (6).

7. The trimmer head with an independently floating stationary blade according to claim 1, characterized in that... A multi-faceted pin (8) is provided between the output shaft (51) of the drive mechanism (5) and the moving tool holder (4). One end of the multi-faceted pin (8) is fixed on the output shaft (51), and the other end is inserted into the transmission hole in the moving tool holder (4) so ​​that the moving tool holder (4) is at a predetermined height in the stationary tool holder (2) and can rotate synchronously with the drive mechanism (5). A spring plate (7) is provided at the bottom of the moving knife holder (4). The moving knife (3) is inserted into the moving knife holder (4) and its bottom is connected to the spring plate (7). Under the elastic force of the spring plate (7), the moving knife (3) always keeps in contact with the stationary knife (1). When the stationary knife (1) is subjected to external force, the stationary knife (1) can press down the moving knife (3) and the floating ring (6) to float downward along the axis of the stationary knife holder (2). When the external force disappears, the spring plate (7) can drive the moving knife (3) to support the stationary knife (1), so that the stationary knife (1) and the floating ring (6) automatically reset.

8. The trimmer head with an independently floating stationary blade according to claim 1, characterized in that... A spring-loaded drive element (9) is provided between the output shaft (51) of the drive mechanism (5) and the moving tool holder (4). One end of the spring-loaded drive element (9) is fixed to the output shaft (51), and the other end is inserted into the moving tool holder (4) and elastically supports the moving tool holder (4), so that the moving tool (3) installed in the moving tool holder (4) always keeps in contact with the stationary tool (1). When the stationary tool (1) is subjected to external force, the stationary tool (1) presses down on the moving tool (3) and the floating ring (6), so that... The stationary blade (1), the moving blade (3), the floating ring (6), and the moving blade holder (4) float downwards synchronously along the axial direction of the stationary blade holder (2); and when the external force disappears, the elastic drive component (9) supports the moving blade holder (4), causing the moving blade (3) to support the stationary blade (1) and the floating ring (6) to automatically reset; or, the elastic drive component (9) supports the moving blade holder (4), causing the moving blade holder (4) to drive the floating ring (6), the stationary blade (1), and the moving blade (3) to automatically reset.

9. The trimmer head with an independently floating stationary blade according to claim 8, characterized in that... The elastic drive component (9) includes a transmission base (91), a transmission sleeve (92), and a spring (93) located between the transmission base (91) and the transmission sleeve (92); wherein, The transmission base (91) is cylindrical, with a shaft hole (911) through both ends on its upper end face, and a countersunk hole between the shaft hole (911) and the outer edge, so that the upper end face of the transmission base (91) forms an inner groove (912); multiple transmission grooves (913) are provided on the outer peripheral side wall of the transmission base (91), with one end of each transmission groove (913) spaced apart from the upper end face of the transmission base (91), and the other end penetrating through the lower end face of the transmission base (91); The transmission sleeve (92) is annular, and a sealing plate is formed at one end of the transmission sleeve (92) to form an opening at the other end. A triangular transmission head (94) is provided on the outer end face of the sealing plate. The transmission head (94) is inserted into a matching limiting hole in the positioning post of the moving tool holder (4) so ​​that the moving tool holder (4) and the transmission sleeve (92) are connected in transmission. The inner wall of the transmission sleeve (92) is provided with a number of transmission blocks (921) equal to the number of transmission grooves (913). Each transmission block (921) is inserted into the transmission groove (913) so that the transmission sleeve (92) can be axially floating and fixedly connected to the transmission base (91).

10. A pruning tool, characterized in that... The trimmer head with an independently floating stationary blade is included in any one of claims 1 to 9.

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