A trimming head

Abstract

The present invention relates to a shaving head, characterized in that at least three blade assemblies are mounted side by side within a housing. When viewed in the direction of the shaving head's reciprocating swing, the highest points of each blade assembly in a static state form an arc R, with a diameter of 150 mm ≤ R ≤ 30 mm. The present invention has the beneficial effect of maximizing the approximation of the arcs formed between the blade assemblies to the human body curves of the chin, cheeks, and neck, where beards grow. The at least three blade assemblies mounted within the housing are mounted at different heights, so that their highest points in a static state connect to form an arc R, with a diameter of 150 mm ≤ R ≤ 30 mm. This minimizes the effect of the human body curves on the fit of each blade assembly to the skin, improves the fit and coverage of each blade assembly, and shortens the length of residual beard roots, thereby enhancing the shaving efficiency and effectiveness of each blade assembly.

Description

Technical Field

[0001] The present invention relates to a hair trimming tool, and more particularly to a trimming head for a reciprocating hair trimming tool. Background Art

[0002] With the continuous development of society, people's living standards are constantly improving, and individuals are paying more and more attention to their appearance. For this reason, various types of razors have emerged, among which reciprocating razors are very popular among users.

[0003] Existing reciprocating shavers have two main types of trimming heads. The first is a single-blade trimming head, which trims hair using a single set of blades. This type of trimming tool is simple in structure and relatively affordable, making it popular with some users, especially the elderly. The second type is a multi-blade trimming head, which integrates multiple blades side by side within the head housing. This type of multi-blade trimming tool is popular among business people and young people due to its high power and large theoretical coverage area.

[0004] However, because the blade assemblies of existing multi-blade reciprocating shavers are located at the same level and fixedly connected to the cutter head housing, the blade assemblies on the side away from the skin or installed in the middle cannot contact the skin during use. Therefore, the shaver as a whole needs to be kept vertical to the skin to ensure that the blade assemblies can contact the skin and perform shaving effectively. Keeping the shaver vertical to the skin during use does not conform to user usage habits. In most cases, users hold the shaver at an angle when using it, so that only one blade assembly can shave. This reduces the coverage area of ​​the multi-blade shaver and the degree of contact with the skin, which in turn reduces the shaving efficiency and shaving effect of the shaver. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a pruning head, which controls the fixed height difference between each blade group to form an arc between the highest points of each blade group, so that the curvature between each blade group is closer to the curvature of the human head, thereby ensuring the fit between each blade group and the human head skin, and improving the shaving efficiency and shaving effect of the pruning head.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is a pruning head, comprising a blade group and a housing for mounting the blade group; spring plates are provided at both ends of the housing, and the upper end surface and the side surfaces of the spring plates are respectively connected to the upper end surface and the side walls of the housing at both ends as a whole, so that a buffer cavity is formed between the spring plates and the side walls of the housing at both ends; at least three blade groups are mounted side by side in the housing and connected to the spring plates at both ends, and when viewed from the direction of the reciprocating swing of the pruning head, an arc R is formed between the highest points of each blade group in a static state, and the diameter of the arc R is: 150mm≤ R≤30mm; wherein, the blade group includes at least two groups of mesh knife groups, the mesh knife group includes a mesh bracket, and square grooves are respectively provided on the side walls at both ends of the mesh bracket, and elastic plates with a thickness less than the thickness of the side walls at both ends of the mesh bracket are provided in the square grooves, and the sliders protrude from the side walls at both ends of the mesh bracket and are fixed on the elastic plates and are an integral structure with the elastic plates; on each spring sheet at both ends of the shell, there are respectively provided with sliding grooves with a number equal to the mesh knife groups and a depth less than the thickness of the spring sheet, and the slider is inserted into the sliding groove so that the mesh bracket can float up and down and be dynamically connected to the spring sheet or fixedly connected to the spring sheet.

[0007] Preferably, the two outermost blade groups of the at least three blade groups are connected to the housing with their highest points being on the same horizontal line in a static state.

[0008] Preferably, in a static state, the highest points of the blade assemblies are respectively located on different horizontal lines and connected to the housing.

[0009] Preferably, each blade assembly can float up and down and is arranged side by side in the shell and is movably connected to the shell.

[0010] Preferably, each slide groove is on the same horizontal line or different horizontal lines on the spring sheet, the length of each slider is equal to or less than the length of the slide groove, and the slider is inserted into the slide groove so that the mesh bracket can float up and down and be dynamically connected to the spring sheet or fixedly connected to the spring sheet.

[0011] Preferably, each blade group includes at least one intermediate knife group, which includes an intermediate knife holder. A hook is provided on the outer wall of the intermediate knife holder, and a hook groove is provided between the slide grooves on the spring pieces at both ends of the shell. The length of the hook is equal to or less than the length of the hook groove. The hook is placed in the hook groove so that the intermediate knife holder can float up and down and be movably connected to the spring piece or fixed with the spring piece.

[0012] Preferably, guide plates are provided on both sides of the hook groove of each spring piece, and an open groove is provided above the guide plate; a limit column is provided on the middle tool holder, which is placed in the open groove and can make the middle tool holder float vertically up and down along the open groove under the action of external force.

[0013] Preferably, a support plate is provided on each spring sheet in the shell, one end of the support plate is fixed to the spring sheet, and the other end is provided with a spring seat, and the lower end face of each guide plate is connected as a whole with both sides of the support plate; one end of the floating spring is sleeved on the spring seat, and the other end is sleeved on the mounting column provided on the middle tool holder so that the middle tool group moves downward under the action of external force and automatically resets under the action of the floating spring.

[0014] Preferably, two ribs are provided on the inner side walls on both sides of the shell, which are arranged side by side and spaced apart, so that a guide groove is formed between the two ribs.

[0015] Preferably, a guide column is provided on the outer side wall of the mesh bracket, and the guide column is placed in the guide groove on the two side walls inside the shell, so that the mesh bracket can be vertically displaced up and down along the guide groove.

[0016] Preferably, the thickness of the elastic plate is smaller than the thickness of the side walls at both ends of the mesh support.

[0017] The beneficial effect of the present invention is that, restricted by the curves of the human body at places where beards grow, such as the chin, cheeks and neck, at least three blade groups installed in the housing are installed at different horizontal heights, so that the highest points of each blade group in a static state are connected to form an arc R, and the diameter of the arc R is: 150mm≤R≤30mm. In this way, the arc formed between the blade groups can be made close to the human body curves at the chin, cheeks and neck to the greatest extent, reducing the influence of the human body curve on the fit of each blade group to the skin, improving the fit and coverage of each blade group to the skin, and shortening the length of the residual beard roots, thereby improving the shaving efficiency and shaving effect of each blade group. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a main structural diagram of a trimming head according to an embodiment of the present invention.

[0019] Figure 2 A three-dimensional structural diagram of a trimming head according to an embodiment of the present invention

[0020] Figure 3 This is a cross-sectional structural diagram of the mesh knife assembly in an embodiment of the present invention.

[0021] Figure 4 This is a cross-sectional structural diagram of the assembly of a trimming head according to an embodiment of the present invention.

[0022] Figure 5 This is a cross-sectional structural diagram of the assembly of the middle knife group in an embodiment of the present invention.

[0023] Figure 6 This is a front view of the three-dimensional structure of the shell in the embodiment of the present invention

[0024] Figure 7 This is a bottom perspective structural diagram of the housing in an embodiment of the present invention.

[0025] Figure 8 This is a cross-sectional structural diagram of the mesh support assembly according to an embodiment of the present invention.

[0026] Figure 9 A three-dimensional structural diagram of the intermediate tool holder in an embodiment of the present invention DETAILED DESCRIPTION

[0027] The embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0028] like Figure 1-9 As shown, the present invention is a shaving head comprising a blade assembly 1 and a housing 2 for mounting the blade assembly 1. At least three blade assemblies 1 are mounted side by side within the housing 2. When viewed from the direction of the shaving head's reciprocating motion, the highest points of each blade assembly 1 in a static state form an arc R, with a diameter of 150 mm ≤ R ≤ 30 mm. Because the blade assemblies 1 of existing multi-head reciprocating shavers are all mounted on the same horizontal line, and beards are mostly concentrated on the upper lip, chin, cheeks, and neck, arranging the blade assemblies 1 on the same horizontal line due to the body's curves at the chin, cheeks, and neck significantly affects the fit of each blade assembly 1 against the skin, thereby reducing the shaving efficiency and effectiveness of the shaving head. The at least three blade assemblies 1 installed in the housing 2 are installed at different horizontal heights so that the highest points of the blade assemblies 1 in a static state (when the shaver is not turned on, as viewed from the swinging direction of the trimming head) are connected to form an arc R. The diameter of the arc R is 150mm≤R≤30mm, and the diameter of the arc R is preferably 80mm. In this way, the arc R formed between the highest points of the blade assemblies 1 can be made to be close to the human body curves of the chin, cheeks, neck, etc. to the greatest extent, reducing the influence of the human body curve on the fit of the blade assemblies 1 to the skin, improving the fit and coverage of the blade assemblies 1 to the skin, and shortening the length of the residual beard roots, thereby improving the shaving efficiency and shaving effect of each blade assembly 1.

[0029] Of course, in the actual production process, it can also be adjusted according to the side-by-side installation distance L of each blade group 1. For example, when the installation distance L between each blade group 1 is greater than 20 mm, the diameter of the arc R can be set to be greater than 60 mm and less than 150 mm, for example, 60 mm, 80 mm or 120 mm; when the side-by-side installation distance L of the blade groups 1 is larger, the spacing between each blade group 1 will also increase accordingly. Therefore, setting the diameter of the arc R to be greater than 60 mm can make the arc R smoother, and can make each blade group 1 closer to the human body curve of each part of the human head where a beard grows, thereby improving the fit of each blade group 1 to the skin, making the beard roots on the skin shorter, and effectively improving the shaving efficiency and shaving effect of the trimming head.

[0030] When the side-by-side installation distance L of each blade group 1 is less than 20mm, the spacing between each blade group 1 is correspondingly reduced due to the reduction of the installation distance L. At this time, if the diameter of the arc R is set to be larger, such as above 60mm, the line connecting the static highest points of each blade group 1 will be closer to a straight line, and the curvature difference with the human body curve cannot be reduced. Therefore, when the side-by-side installation distance L of each blade group 1 is less than 20mm, the diameter of the arc R formed by the line connecting the highest points of each blade group 1 in the static state is less than 60mm, for example, it can be set to 40mm, 35mm, etc., so that the highest points of each blade group 1 are connected to form an arc R, thereby reducing the curvature difference with the head human body curve, improving the fit of each blade group 1 to the skin, and improving the shaving efficiency and shaving effect of the razor.

[0031] To ensure the shaving head can best fit different areas of long beards, improve the contact between each blade assembly 1 and the skin, and ensure the shaving efficiency and shaving effect of the shaving head, the highest points of at least the two outermost blade assemblies 1 in the static state are connected to the housing 2 on the same horizontal line. The two outermost blade assemblies 1 are arranged on the same horizontal line, and the static highest point of the blade assembly 1 in the middle is lower than the static highest points of the two outer blade assemblies 1. This allows the highest points of each blade assembly 1 in the static state (off state) to connect and form an arc R that curves inward of the shaver. In this way, when in use, the arc R formed between the blade assemblies 1 can best approximate the curves of various parts of the human head, expanding the contact area between each blade assembly 1 and the skin and the contact between each blade assembly 1 and the skin of corresponding parts of the human head, thereby improving the shaving efficiency and shaving effect of each blade assembly 1. In actual use, the static highest point of the middle blade assembly 1 can also be set higher than the static highest points of the two outermost blade assemblies 1, so that the highest points of each blade assembly 1 in the static state form an outwardly curved arc R, which can also achieve beard trimming. However, if the middle blade assembly 1 is higher than the blade assemblies 1 on both sides, the blade assemblies 1 on both sides will be hindered from approaching the side of the middle blade assembly 1, and the shaving effect will not be achieved. Therefore, it is preferred to set the static highest point of the middle blade assembly 1 lower than the highest point of the outermost blade assemblies 1.

[0032] Unlike the structure of the blade assembly 1 described above, this embodiment also proposes another embodiment, namely, the highest point of each blade assembly 1 in the static state is respectively set on different horizontal lines, so that the line connecting the highest points of the blade assemblies 1 on the outermost sides in the static state forms an oblique line, while the highest point of the blade assembly 1 in the static state is lower than the oblique line. In this way, after assembly, the blade assemblies 1 on the pruning head can be tilted as a whole, and the highest points of each blade assembly 1 in the static state can also form an inwardly curved arc R. During use, not only can the overall tilt be used to adapt to different parts of the head, but the arc R between the blade assemblies 1 can also be used to reduce the curvature difference with the human body curve of various parts of the head, effectively increasing the contact area between each blade assembly 1 and the skin and the skin fit of the corresponding parts of the human head, thereby improving the shaving efficiency and shaving effect of each blade assembly 1.

[0033] To minimize the impact of the human body curves on the fit of each blade assembly 1 against the skin, each blade assembly 1 is independently and vertically floatable, arranged side by side within the housing 2 and dynamically connected to the housing 2. Each blade assembly 1 is configured to float up and down along the housing 2. During use, when the trimming head contacts the skin, simply pressing the shaver body with a little force will cause each blade assembly 1 to move downward, automatically conforming to the skin in contact. This effectively ensures the fit of each blade assembly 1 against the skin, reduces the impact of the human body curve on the fit of each blade assembly 1, shortens the residual length of the beard root during shaving, and improves the shaving efficiency and shaving effect of the shaver. When shaving is complete, simply release the shaver, and each blade assembly 1 will automatically return to its original position. While each blade assembly 1, which can float up and down under external force, improves skin contact and enhances the shaving performance, after a period of use or due to the influence of debris, individual blade assemblies 1 may occasionally become stuck, preventing them from floating up and down, necessitating regular maintenance. Of course, each blade assembly 1 can also be fixedly connected to the housing 2. While this fixed connection ensures operational stability, it provides poor skin contact and consequently reduces the shaving performance of the trimming head. Both mounting structures have their advantages and disadvantages, and the specific structure to be adopted can be determined based on user requirements or market demand.

[0034] To facilitate assembly of each blade assembly 1 with the housing 2 and improve assembly efficiency, spring clips 3 are provided at both ends of the housing 2. The upper end surface and side surfaces of the spring clips 3 are integrally connected to the upper end surface and side walls of the housing 2, respectively, forming a buffer cavity 31 between the spring clips 3 and the side walls of the housing 2. Each blade assembly 1 is connected to the spring clips 3 at both ends. By providing spring clips 3 at both ends of the housing 2 and utilizing the upper end surface and left and right side surfaces of the spring clips 3 to connect to the housing 2 to form a buffer cavity 31 between the spring clips 3 and the side walls of the housing 2, during assembly of the blade assemblies 1, the spring clips 3 can bend and deform toward the buffer cavity 31 when subjected to force, thereby improving assembly efficiency of each blade assembly 1 and facilitating disassembly and replacement of the blade assemblies 1.

[0035] In order to improve the production and assembly efficiency of the blade assembly 1 and enhance the fit between the blade assembly 1 and the skin, each blade assembly 1 includes at least two mesh blade assemblies 11, each mesh blade assembly 11 including a mesh bracket 111; each spring sheet 3 at both ends of the housing 2 is provided with a number of sliding grooves 32 equal to the number of mesh blade assemblies 11, and each sliding groove 32 is located at the same horizontal line or different horizontal lines on the spring sheet 3; a slider 112 is provided on each side wall of the mesh bracket 111, protruding from the side wall, and the length of each slider 112 is equal to or less than the length of the sliding groove 32. The slider 112 is inserted into the sliding groove 32, so that the mesh bracket 111 can float up and down and be dynamically connected to the spring sheet 3 or fixedly connected to the spring sheet 3. The sliding groove 32 is provided on the spring sheet 3, and the slider 112 is provided on the mesh bracket 111. During assembly, the slider 112 can be inserted into the sliding groove 32 to connect the mesh blade assembly 11 to the spring sheet 3. In order to facilitate the control of different mesh knife groups 11 at the same or different heights, it is only necessary to adjust the height of the slide 32 on the spring plate 3. Secondly, the fixed connection or floating connection of the mesh knife group 11 can also be achieved by controlling the length of the slide 32 on the spring plate 3. For example, the length of the slide 32 is set to be consistent with the length of the slider 112, so that the mesh knife group 11 can be directly fixed to the spring plate 3, effectively improving the connection strength between the mesh knife group 11 and the shell 2. If the mesh knife group 11 is required to float up and down along the shell 2, it is only necessary to set the length of the slide 32 on the spring plate 3 to be greater than the length of the slider 112, so that the slider 112 on the mesh bracket 111 can be moved up and down along the slide 32 after being inserted into the slide 32.

[0036] To facilitate trimming long beards and improve the shaving efficiency of the trimming head, each blade assembly 1 includes at least one intermediate blade assembly 12. The intermediate blade assembly 12 includes an intermediate blade holder 121. A hook 122 is provided on the outer wall of the intermediate blade holder 121. Hook slots 33 are provided between the slide slots 32 on the spring plates 3 at both ends of the housing 2. The length of the hook 122 is equal to or less than the length of the hook slot 33. The hook 122 is placed in the hook slot 33, allowing the intermediate blade holder 121 to float up and down, dynamically connected to the spring plates 3, or fixedly engaged with the spring plates 3. Because the mesh of the mesh blade assembly 11 is covered with tiny beard guide holes, the mesh blade assembly 11 can only trim short beards. As is well known, when hair (beard) is longer than 5mm, its shape will be more or less curled, which relatively increases the cross-sectional area of ​​the beard passing through, and it cannot enter the mesh of the mesh blade assembly 11 through the beard guide hole. Therefore, at least one intermediate blade assembly 12 is added to the blade assembly 1. The intermediate blade assembly 12 is used to trim long beards, so that the trimming of long and short beards can be achieved without the need for separate side trimmers on the shaver, thereby improving the overall aesthetics of the shaver and optimizing the overall structure of the shaver. Hooks 122 are respectively provided on both ends of the intermediate blade holder 121 of the intermediate blade assembly 12. The hooks 122 are used to hook and connect with the hook grooves 33 provided on the spring plate 3. While facilitating the connection between the intermediate blade assembly 12 and the housing 2, the intermediate blade assembly 12 can also be made to float up and down by controlling the length of the hook grooves 33. If the intermediate blade assembly 12 is to be fixedly connected to the housing 2, the length of the hook 122 can be matched to the length of the hook groove 33 during production, thereby achieving a fixed connection between the intermediate blade assembly 12 and the housing 2 and ensuring a secure connection between the intermediate blade assembly 12 and the housing 2. If the intermediate blade assembly 12 is to float up and down along the housing 2 under the action of an external force, thereby improving the fit of the intermediate blade assembly 12 to the skin, the length of the hook groove 33 on the spring plate 3 can be set to be greater than the length of the hooks 122 on both ends of the intermediate blade holder 121. In this way, when the intermediate blade assembly 12 is subjected to an external force, it can move downward along the hook groove 33, and when the external force disappears, the intermediate blade assembly 12 can automatically return to its original position.

[0037] In order to prevent the intermediate knife group 12 from being dislocated or deflected during the up and down floating process, which may cause the intermediate knife group 12 to get stuck and affect the performance of the intermediate knife group 12, guide plates 34 are respectively provided on both sides of the hook groove 33 of each spring piece 3, and an opening groove 35 is provided above the guide plate 34; a limiting column 123 is provided on the intermediate knife holder 121, and the limiting column 123 is placed in the opening groove 35 and can make the intermediate knife holder 121 float vertically up and down along the opening groove 35 under the action of external force. By providing a guide plate 34 with an open slot 35 on the spring piece 3 and providing a limit column 123 on the intermediate tool holder 121, when the hooks 122 at both ends of the intermediate tool holder 121 are inserted into the hook slots 33, the limit column 123 can be placed in the open slots 35. When the intermediate tool group 12 is displaced downward under force, the limit column 123 can be synchronously displaced up and down along the open slots 35. Restricted by the open slots 35 of the guide plate 34, the intermediate tool holder 121 can be effectively prevented from being dislocated or deflected during the up and down displacement process, thereby ensuring the working stability of the intermediate tool group 12.

[0038] To ensure the automatic repositioning of the middle blade assembly 12 and improve its fit with the skin, a support plate 36 is provided on each spring plate 3 within the housing 2. One end of the support plate 36 is fixed to the spring plate 3, and the other end is provided with a spring seat 37. The lower end surface of each guide plate 34 is integrally connected to both sides of the support plate 36. A floating spring 124 has one end mounted on the spring seat 37 and the other end mounted on a mounting post 125 provided on the middle blade holder 121, enabling the middle blade assembly 12 to move downward under external force and automatically reposition under the action of the floating spring 124. By providing the support plate 36 on the spring plate 3, one end of the floating spring 124 is mounted on the spring seat 37, and the other end is mounted on the mounting post 125 provided on the middle blade holder 121, externally driving the middle blade holder 121 to automatically reposition. During use, when the middle blade assembly 12 is subjected to external force, the middle blade holder 121 can move downward along the opening slot 35 on the guide plate 34 to make the middle blade assembly 12 fit the skin better. When the external force disappears, the middle blade holder 121 can automatically return to its original position under the elastic force of the floating spring 124.

[0039] To enhance the working strength of the housing 2 and prevent deformation thereof, two ribs 21 are provided on the inner sidewalls of the housing 2, spaced apart and arranged side by side, with a guide groove 22 formed between the two ribs 21. The addition of two ribs 21 to the inner sidewalls of the housing 2 effectively prevents the housing 2 from shrinking and deforming during the production process. Furthermore, the guide groove 22 formed between the two ribs 21 serves to limit the mesh blade assembly 11, thereby improving its working stability.

[0040] In order to prevent the mesh knife group 11 from being dislocated or deflected when floating up and down, causing the mesh knife group 11 to get stuck and affecting the performance of the mesh knife group 11, a guide column 126 is provided on the outer side wall of the mesh bracket 111. The guide column 126 is placed in the guide groove 22 on the side walls on both sides of the shell 2, so that the mesh bracket 111 can be vertically displaced up and down along the guide groove 22. By providing a guide post 126 on the outer wall of the mesh support 111 of the mesh blade assembly 11, the guide post 126 can be placed in the guide groove 22 during assembly. When the mesh blade assembly 11 is subjected to external force, the sliders 112 at both ends of the mesh support 111 and the guide posts 126 on the outer wall simultaneously move downward along the slide groove 32 on the spring 3 and the guide groove 22 on the inner wall of the housing 2. This improves the fit of the mesh blade assembly 11 with the skin, enhances the shaving efficiency and shaving effect of the mesh blade assembly 11, and prevents the movable blade in the mesh blade assembly 11 from being damaged by force, thereby protecting the blade of the movable blade and extending the service life of the movable blade. When the external force disappears, the reset spring on the movable blade seat may drive the movable blade seat to reset, and the movable blade seat and the power are synchronously moved upward. When the blade of the movable blade contacts the inner side of the mesh of the mesh blade assembly 11, it will also synchronously drive the mesh and the mesh support 111 to move upward and reset along the slide groove 32 and the guide groove 22.

[0041] In order to facilitate the assembly and disassembly of the mesh blade group 11 and improve the efficiency of the assembly and disassembly of the mesh blade group 11, square grooves 113 are respectively provided on the side walls at both ends of the mesh bracket 111. Elastic plates 114 having a thickness less than that of the side walls at both ends of the mesh bracket 111 are provided in the square grooves 113. Sliders 112 are fixed on the elastic plates 114 and are integrated with the elastic plates 114. When the sliders 112 are installed on the elastic plates 114, when the mesh blade group 11 is assembled, when the slides 112 on both sides of the mesh bracket 111 contact the springs 3 at both ends of the shell 2, the springs 3 and the elastic plates 114 will bend and deform in opposite directions synchronously after being subjected to force. In this way, the slides 112 on the mesh bracket 111 can be more conveniently and quickly engaged with the slide grooves 32 on the springs 3, thereby improving the assembly efficiency of the mesh blade group 11 and the shell 2.

[0042] The above embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A trimming head comprising a blade assembly (1) and a housing (2) for mounting the blade assembly (1); characterized in that Spring sheets (3) are provided at both ends of the housing (2), and the upper end surface and the side surfaces of the spring sheets (3) are connected to the upper end surface and the side walls at both ends of the housing (2) as a whole, so that a buffer cavity (31) is formed between the spring sheets (3) and the side walls at both ends of the housing (2); at least three blade groups (1) are installed side by side in the housing (2) and are connected to the spring sheets (3) at both ends, respectively. When viewed from the direction of the reciprocating swing of the pruning head, an arc R is formed between the highest points of each blade group (1) in a static state, and the diameter of the arc R is: 150mm≤R≤30mm; wherein the blade group (1) includes at least two mesh blade groups (11), and the mesh blade group (11) includes A mesh support (111) is provided with square grooves (113) on the side walls at both ends of the mesh support (111), an elastic plate (114) is provided in the square grooves (113), a slider (112) protrudes from the side walls at both ends of the mesh support (111) and is fixed on the elastic plate (114) and is an integral structure with the elastic plate (114); and a slide groove (32) equal in number to the mesh blade group (11) and having a depth less than the thickness of the elastic plate (3) is provided on each elastic plate (3) at both ends of the shell (2), and the slider (112) is clamped in the slide groove (32) so that the mesh support (111) can float up and down and be movably connected to the elastic plate (3) or fixedly clamped to the elastic plate (3).

2. A trimming head according to claim 1, characterized in that The two outermost blade groups of the at least three blade groups (1) are connected to the housing (2) with their highest points being on the same horizontal line in a static state.

3. The trimming head according to claim 1, characterized in that In a static state, the highest points of each blade assembly (1) are located on different horizontal lines and are connected to the housing (2).

4. The trimming head according to claim 1, characterized in that Each blade assembly (1) can float up and down and is arranged side by side in the shell (2) and is movably connected to the shell (2).

5. The trimming head according to claim 1, characterized in that Each chute (32) is located on the same horizontal line or different horizontal lines on the spring sheet (3); the length of each slider (112) is equal to or less than the length of the chute (32); the slider (112) is inserted into the chute (32) so that the mesh bracket (111) can float up and down and be dynamically connected to the spring sheet (3) or fixedly connected to the spring sheet (3).

6. The trimming head according to claim 1, characterized in that Each blade group (1) includes at least one intermediate blade group (12), and the intermediate blade group (12) includes an intermediate blade holder (121). A hook (122) is provided on the outer wall of the intermediate blade holder (121), and a hook groove (33) is provided between the slide grooves (32) on the spring pieces (3) at both ends of the shell (2). The length of the hook (122) is equal to or less than the length of the hook groove (33). The hook (122) is placed in the hook groove (33) so that the intermediate blade holder (121) can float up and down and be movably connected to the spring piece (3) or be fixedly connected to the spring piece (3).

7. The trimming head according to claim 6, characterized in that A guide plate (34) is provided on both sides of the hook groove (33) of each spring piece (3), and an opening groove (35) is provided above the guide plate (34); a limiting column (123) is provided on the intermediate tool holder (121), and the limiting column (123) is placed in the opening groove (35) and can make the intermediate tool holder (121) float vertically up and down along the opening groove (35) under the action of external force.

8. The trimming head according to claim 6, characterized in that A support plate (36) is provided on each spring sheet (3) in the housing (2), one end of the support plate (36) is fixed to the spring sheet (3), and the other end is provided with a spring seat (37), and the lower end surface of each guide plate (34) is connected to both sides of the support plate (36) as a whole; one end of the floating spring (124) is sleeved on the spring seat (37), and the other end is sleeved on the mounting column (125) provided on the intermediate knife holder (121), so that the intermediate knife group (12) is displaced downward under the action of an external force and automatically reset under the action of the floating spring (124).

9. The trimming head according to claim 1, characterized in that Two rib plates (21) are respectively provided on the inner side walls of both sides of the shell (2) and are arranged side by side and at intervals, so that a guide groove (22) is formed between the two rib plates (21).

10. The trimming head according to claim 1, characterized in that A guide post (126) is provided on the outer side wall of the mesh support (111). The guide post (126) is placed in the guide groove (22) on the inner side walls of the housing (2), so that the mesh support (111) can be vertically displaced up and down along the guide groove (22).

11. The trimming head according to claim 1, characterized in that The thickness of the elastic plate (114) is smaller than the thickness of the side walls at both ends of the mesh support (111).

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