Pruning tool with a head assembly having a multi-stage dynamic adjustment of the cutting angle

Abstract

The present application relates to a kind of head assembly with multi-grade dynamic adjustment pruning angle and pruning tool, it is characterized in that at least one locking groove that shell is locked with different pruning angle relative to main body is provided on shell, external control component is inserted into locking groove under controllable state, so that shell is locked with preset pruning angle relative to main body and self-locking locking gear state.The present application has beneficial effect, at least one locking groove is arranged in the bottom of shell, when shell needs to be kept at a certain preset pruning angle relative to main body, user can control external control component to be inserted into locking groove, so that shell is kept at the required pruning angle relative to main body and is locked to form locking gear state.In the face chin or the area between cheek and neck is shaved, user can drive head assembly to repeatedly shave back and forth, avoid that head assembly cannot be closely attached to skin due to contour limitation, guarantee that head assembly is consistent with the skin of these specific areas, improve the efficiency of head assembly and pruning benefit.

Description

Technical Field

[0001] This invention relates to a device for trimming beards and other hair, and more specifically to a blade assembly and trimming tool with multiple dynamically adjustable trimming angles, mainly used in the field of hair trimming tools such as razors and hair trimmers. Background Technology

[0002] There are two main types of existing blade assembly and trimming tool body assembly. One type uses a snap-fit ​​structure to directly connect the blade assembly to the body in a detachable manner. After assembly, the blade assembly and body become one unit, and the installation direction of each blade component within the assembly is relatively fixed. During use, the user must constantly adjust the trimming angle of the body and blade assembly according to different skin contours (such as cheekbones, chin, jaw, or neck) to ensure the fit between each blade component and the skin, as well as the hair trimming performance and effect of the blade assembly.

[0003] Secondly, the blade assembly is hinged to the bracket, which is fixed to the main body. After assembly, the blade assembly can rotate freely relative to the main body along the hinge axis. During use, the blade assembly can automatically adjust its angle to conform to the skin according to different contours, ensuring the fit between each blade component and the skin.

[0004] While this structure eliminates the need for users to constantly adjust the trimming angle of the body and blade assembly, it also presents certain drawbacks. For instance, when a particular area has abundant hair and the user needs the blade assembly to maintain the same trimming angle for repeated trimming, the blade assembly is limited by the skin contours (such as the cheekbones, chin, jaw, or neck, where the skin contours vary considerably). As the blade assembly slides along these areas, the trimming angle changes continuously, failing to meet the user's need for repeated trimming in specific areas. This results in reduced trimming effectiveness and efficiency for beards and other hairs, relatively prolonging the user's shaving or hair removal time and lowering the user experience. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a blade assembly and trimming tool with multiple dynamically adjustable trimming angles. This blade assembly can automatically adjust its trimming angle according to the skin contour, improving the fit between the blade assembly and the skin, as well as trimming efficiency and performance. Furthermore, it can be adjusted or locked at a preset trimming angle according to user needs, facilitating repeated trimming of a specific area, enhancing the trimming effect and efficiency, and shortening the user's hair trimming time.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is a blade assembly with multiple dynamically adjustable trimming angles, including a housing and at least one blade assembly installed in the housing, the outer surface of the blade assembly being placed outside the housing and in contact with the skin surface; it also includes at least one bracket, one end of which is connected to the main body, and the housing and the other end of the bracket are hinged and fixed, so that the housing is suspended relative to the main body, and the housing can swing freely in a free-position state relative to the thickness direction of the main body about the hinge axis;

[0007] The housing is provided with at least one locking groove that locks the housing relative to the main body at different trimming angles. An external control component is inserted into the locking groove in a controllable state, so that the housing is in a preset trimming angle relative to the main body and is in a self-locking locking position.

[0008] Preferably, a vertical distance H1 is formed between the lowest point of the housing and the highest point of the cutter head assembly, and a vertical distance H2 is formed between the hinge axis of the housing and the bracket and the lowest point of the housing; wherein, with the lowest point of the housing as the reference, H1×0.5≤H2≤H1.

[0009] Preferably, with the hinge axis between the housing and the bracket as a reference, the included angle S1 formed between the extended lines at both ends of the locking groove is less than or equal to 120°.

[0010] Preferably, at least one adjustment groove is provided at the bottom of the housing to adjust the housing relative to the main body at different trimming angles. An external control component is inserted into the adjustment groove in a controllable state, so that the housing is in an adjustable trimming angle position relative to the main body.

[0011] Preferably, with the hinge axis between the housing and the bracket as a reference, the included angle S2 formed between the extended lines at both ends of the adjustment groove is less than or equal to 120°.

[0012] Preferably, the locking groove is provided with multiple continuously spaced toothed grooves, each toothed groove being at a different angle to the vertical line of the hinge shaft; the external control component can be inserted into any toothed groove in a controllable state, so that the housing is at a preset trimming angle relative to the main body and locked in a non-adjustable locking position.

[0013] Preferably, the adjustment groove is provided with multiple continuously spaced limiting grooves, and each limiting groove is at a different angle relative to the vertical line of the hinge axis; the external control component can be inserted into any limiting groove in a controllable state, so that the housing is in an adjustable position with an adjustable trimming angle and self-locking relative to the main body.

[0014] Preferably, there are two adjustment grooves, and the locking groove is located between the two adjustment grooves. The three are spaced apart and parallel to each other, and are arranged on the outer surface of the bottom of the shell along the thickness direction of the shell.

[0015] Preferably, a plurality of cutter head assemblies are provided inside the housing, wherein the plurality of cutter head assemblies are arranged side by side in the cutter head seat along the same horizontal line, diagonal line or arc and are movably connected to the cutter head seat respectively, and each cutter head assembly can be displaced vertically relative to the cutter head seat when an external force is applied to the cutter head assembly.

[0016] Preferably, the hinge axis of the housing and the bracket is close to or below the bottom surface of the cutter head seat, or flush with the bottom surface of the cutter head seat.

[0017] Preferably, the bracket has two right-angle bends, the upper end of which is a vertical plate with a hinge hole, and the two ends of the housing are respectively inserted into the hinge hole by pins so that the two ends of the housing are respectively hinged to the bracket; the lower end of the bracket is a bent plate with a fixing hole and is detachably fixed to the main body by screws.

[0018] Based on the aforementioned blade assembly, this application also proposes a technical solution for a trimming tool, including the aforementioned blade assembly with multiple dynamically adjustable trimming angles and a body; a gear adjustment component that can be displaced relative to the body is installed inside the body;

[0019] One end of the bracket is connected to the machine body, allowing the cutter head assembly to be mounted on top of the machine body, creating a swing gap between them. This allows the cutter head assembly to swing freely relative to the machine body around the hinge axis, maintaining a free-swinging position.

[0020] When an external force is applied to the gear adjustment component and drives it to insert into the locking groove, the cutter assembly is in a self-locking state with a preset trimming angle relative to the machine body.

[0021] Preferably, the gear adjustment component includes a locking tooth, which can be inserted into any slot in the locking groove when an external force is applied to the gear adjustment component, so that the cutter assembly is in a self-locking state with a preset trimming angle relative to the machine body.

[0022] Preferably, the gear adjustment component includes an adjustment tooth, with an elastic element at the bottom of the adjustment tooth; when an external force is applied to the gear adjustment component, the adjustment tooth can be inserted into any limiting groove within the adjustment groove, so that the cutter assembly is in an adjustable gear state with an adjustable trimming angle relative to the machine body, and is self-locked under the action of the elastic element; and,

[0023] When an external force is applied to the cutter head assembly, the adjusting gear can drive the elastic element to contract elastically and slide into any limiting groove, causing the cutting angle of the cutter head assembly relative to the machine body to change and lock itself.

[0024] Preferably, a slide groove is provided on the machine body, and three vertically spaced free stop grooves, adjustment stop grooves and locking stop grooves are provided on the back of the slide groove; the gear adjustment component includes a button and a gear tooth, the button is located outside the machine body and is placed in the slide groove and is movably engaged with the machine body;

[0025] The gear position is located inside the machine body and is linked to the button. When the button is moved up and down along the slide groove by external force, the gear position can be engaged in the free gear groove, the adjustment gear groove, or the locking gear groove, and drive the adjustment gear or locking gear to insert into the adjustment groove or locking groove, so that the cutter head assembly can switch freely between the free gear state, the adjustment gear state, or the locking gear state relative to the machine body.

[0026] Preferably, a release plate is provided on the outer surface of the gear teeth, and a linkage hole is provided in the button. One end of the release plate is connected to the gear teeth as a whole, and the other end passes through the linkage hole so that the release plate can move up and down along the slide groove synchronously with the button. When the release plate is pressed by external force, the gear teeth can disengage from the free gear groove, the adjusting gear groove, or the locking gear groove. When the external force disappears, the gear teeth can be locked into the free gear groove, the adjusting gear groove, or the locking gear groove and form a self-locking mechanism.

[0027] Preferably, the locking teeth, adjusting teeth, and gear teeth are integrated into the adjusting slider. The adjusting slider has a top panel, a front panel, two side panels connecting the top panel and the front panel, and a buckle plate. The locking teeth are located in the top panel, with one end fixed to the top panel as a whole, and the other end can be elastically bent and deformed and can be inserted into the locking groove to lock the cutter head assembly relative to the machine body.

[0028] The gear teeth are located in the front panel, with one end fixed to the front panel as a whole, and the other end can be elastically bent and deformed when the release plate is under force, and can be inserted into the free gear groove, adjustment gear groove or locking gear groove to form a self-locking mechanism; the button passes through the slide groove and is snapped to the front panel.

[0029] Two adjusting teeth are provided and installed in the cavities in the side panel respectively. The elastic element is placed in the cavity to support the adjusting teeth so that one end of the adjusting teeth passes through the top panel and is placed outside the top panel. The buckle plate is snapped to the side panel to close the cavity.

[0030] Preferably, limiting lugs are provided on the outer side panels of the adjusting slider, and arc-shaped protrusions are provided in the middle of each limiting lug. Stop blocks extending along the inner wall are provided on both sides of the inner slider of the machine body. Arc-shaped grooves are provided in the stop blocks, and the arc-shaped protrusions can slide into the arc-shaped grooves when driven by the button.

[0031] Preferably, a top support block is provided inside the machine body, which is detachably connected to the machine body and located behind the adjusting slider.

[0032] The beneficial effects of this invention are:

[0033] 1. The housing is suspended above the main body using at least one bracket. When the user drives the housing or the blade assembly to contact the skin, the housing can swing freely along the thickness of the main body around the hinge axis, forming a free position. The blade assembly can automatically adjust the trimming angle according to the skin contour (such as the chin, jaw, or neck), improving the fit between the blade assembly and the skin, and improving the hair feeding efficiency and trimming efficiency of the blade assembly.

[0034] 2. By providing at least one locking groove at the bottom of the housing, when the housing needs to be held at a preset trimming angle relative to the main body, the user can operate an external control to insert into the locking groove, locking the housing (i.e., the shaving head assembly) relative to the main body at the desired trimming angle, thus forming a locked position. When shaving the area between the chin or cheek and neck, the user can drive the shaving head assembly to repeatedly shave back and forth, avoiding the limitation of the contours of the chin, jaw, or neck that prevents the shaving head assembly from not adhering closely to the skin, ensuring the close contact between the shaving head assembly and the skin in these specific areas, and improving the hair intake and trimming efficiency of the shaving head assembly. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of a blade assembly with multiple dynamically adjustable trimming angles, according to an embodiment of the present invention.

[0036] Figure 2 This is a three-dimensional assembly structure diagram of the cutter head assembly in an embodiment of the present invention.

[0037] Figure 3 This is a three-dimensional structural diagram of the bottom of the housing in an embodiment of the present invention.

[0038] Figure 4 This is a cross-sectional view of the locking groove at the bottom of the housing in an embodiment of the present invention.

[0039] Figure 5 This is a longitudinal sectional view of a blade assembly with multiple dynamically adjustable trimming angles according to an embodiment of the present invention.

[0040] Figure 6 This is a cross-sectional view of a blade assembly with multiple dynamically adjustable trimming angles according to an embodiment of the present invention.

[0041] Figure 7 This is a three-dimensional structural diagram of the bracket in an embodiment of the present invention.

[0042] Figure 8 This is a three-dimensional structural diagram of the trimming tool according to an embodiment of the present invention.

[0043] Figure 9 This is a cross-sectional view of the trimming tool according to an embodiment of the present invention.

[0044] Figure 10 This is a cross-sectional view of the locking teeth and locking groove in the locked position in this embodiment.

[0045] Figure 11 This is a cross-sectional view of the adjusting teeth and adjusting groove locked in the adjusting position in an embodiment of the present invention.

[0046] Figure 12 This is a three-dimensional assembly structure diagram of the gear shift adjustment component and the machine body in an embodiment of the present invention.

[0047] Figure 13 This is a three-dimensional structural diagram of the fuselage in an embodiment of the present invention.

[0048] Figure 14 This is a front perspective view of the gear adjustment component in an embodiment of the present invention.

[0049] Figure 15 This is a three-dimensional assembly structure diagram of the adjusting teeth in an embodiment of the present invention.

[0050] Figure Labels 10. Cutter head assembly; 1. Housing; 2. Cutter head assembly; 21. Guide block; 3. Bracket; 4. Locking groove; 41. Tooth groove; 5. Adjustment groove; 51. Limiting groove; 6. Cutter head seat; 61. Guide groove; 20. Machine body; 21. Slide groove; 22. Free stop groove; 23. Adjustment stop groove; 24. Locking stop groove; 25. Stop block; 26. Arc-shaped groove; 27. Top support block; 30. Gear adjustment component; 31. Locking tooth; 32. Adjustment tooth; 33. Elastic component; 34. Button; 35. Gear tooth; 36. Unsinking plate; 37. Linkage hole; 40. Adjustment slider; 41. Top panel; 42. Front panel; 43. Side panel; 44. Buckle plate; 45. Chamber; 46. Limiting lug; 47. Arc-shaped protrusion. Detailed Implementation

[0051] The following is in conjunction with the appendix Figures 1-15 Further explanation of the embodiments of the present invention:

[0052] like Figures 1-7 As shown, the present invention is a blade assembly with multiple dynamically adjustable trimming angles, including a housing 1 and at least one blade assembly 2 installed in the housing 1. The outer surface of the blade assembly 2 is located outside the housing 1 and can contact the skin surface. The blade assembly 2 is a mature technology in the existing industry, including a stationary blade and a moving blade that swings back and forth along the stationary blade. However, this application does not involve specific technical improvements to the blade assembly 2, and it will not be described in detail in this embodiment.

[0053] like Figure 1 , 2As shown in Figures 5 and 6, to improve the fit between the shaving head assembly 10 and the skin, and to enhance the hair-feeding and trimming efficiency of the shaving head assembly 10, the shaving head assembly 10 also includes at least one support 3. One end of the support 3 is connected to the main body, and the housing 1 is hinged to the other end of the support 3, so that the housing 1 is suspended relative to the main body. Furthermore, the housing 1 can freely swing about the hinge axis in the thickness direction of the main body, creating a free-swinging position. By using at least one support 3 to suspend the housing 1 above the main body, when the user drives the housing 1 or the shaving head assembly 2 to contact the skin, the housing 1 can freely swing about the hinge axis along the thickness direction of the main body, forming a free-swinging position. When the shaving head assembly 2 contacts the skin, it can automatically adjust the trimming angle according to the skin contour, improving the fit between the shaving head assembly 2 and the skin, reducing the shaving blind spots of the shaving head assembly 10, and ensuring the hair-feeding and trimming efficiency of the shaving head assembly 10.

[0054] Although the hinge of the bracket 3 allows the blade assembly 10 to swing freely relative to the main body, improving the fit between the blade assembly 10 and the skin, the blade assembly 10 is limited by the skin contour (such as the significant changes in the contour between the chin or jawline and the neck), especially the blade assembly 10 of the multi-blade assembly 2. When the blade assembly 10 slides along the skin of areas such as the chin, jawline, and Adam's apple, the trimming angle also changes synchronously, which cannot meet the user's need for repeated trimming of these specific areas. In response, this application also proposes the following technical solution: at least one locking groove 4 is provided on the housing 1 to lock the housing 1 relative to the main body at different trimming angles. An external control component is inserted into the locking groove 4 in a controllable state, so that either side of the housing 1 relative to the main body is in a preset trimming angle and self-locking locked position.

[0055] like Figures 4-6 As shown, by providing at least one locking groove 4 at the bottom of the housing 1, when it is necessary for the housing 1 to be held at a preset trimming angle relative to either side of the main body, the user can manually operate (i.e., in a controllable state) insert the external control component into the locking groove 4, so that the housing 1 (i.e., the blade assembly 10) is locked relative to the main body at the required trimming angle, forming a locked position. When shaving the area between the chin or cheek and neck, the user can drive the blade assembly 10 to repeatedly shave back and forth, avoiding the shaving dead angles caused by the contour limitation between the chin or jaw and the neck, which prevents the blade assembly 10 from not being able to fit closely to the skin, thus ensuring the close fit between the blade assembly 10 and the skin in these specific areas, improving the hair entry efficiency and trimming effect of the blade assembly 10. After the blade assembly 10 has finished trimming a specific area, the user can also operate the external control component to separate from the locking groove 4, allowing the blade assembly 10 to switch freely between the free position and the locked position.

[0056] In the above embodiments, although the shaving head assembly 10 can freely swing to conform to the skin contour, reducing shaving dead angles and increasing the contact area between the shaving head assembly 10 and the skin, the shaving head assembly 10 has a certain height. When the shaving head assembly 10 is hinged to the bracket 3 through the housing 1, there are at least three hinge methods depending on the position of the hinge axis. After extensive comparative experiments, the applicant's technical team found that the three hinge methods have significantly different skin fit, shaving dead angles, and shaving efficiency.

[0057] In existing blade assembly 2, the blade protrudes from the housing 1 during installation to prevent the housing 1 from interfering with or obstructing the skin when the stationary blade in the blade assembly 2 comes into contact with the skin. Therefore, the total height of the blade assembly 10 described in this application includes the portion of the blade assembly 2 that protrudes from the housing 1.

[0058] The first hinge method: with the total height of the blade assembly 10 as the reference, the hinge axis is located in the middle of the blade assembly 10. With this hinge method, the upper and lower lever arms of the blade assembly 10 are symmetrical, forming a mechanically neutral point. During use, the symmetrical lever arms cause the blade assembly 10 to lack a clear directional compliance when swinging along the hinge axis. This not only affects the free swinging effect of the blade assembly 10 along the skin contour, but also, when the blade assembly 10 slides along the curved skin contour, it tends to push horizontally along the skin surface rather than swing, increasing the friction between the blade assembly 2 and the skin, causing redness and discomfort for the user. Furthermore, the blade assembly 2 struggles to conform to complex skin contours, such as the chin, jaw, or neck, creating shaving dead spots and resulting in relatively poor shaving efficiency.

[0059] The second hinge method: Based on the total height of the blade assembly 10, the hinge axis is located in the lower half of the blade assembly 10. With this hinge method, the upper lever arm of the blade assembly 10 is greater than the lower lever arm, and the hinge point is relatively low, thus lengthening the lever arm at the upper end of the blade assembly 10. When the blade assembly 10 contacts the skin and experiences slight skin resistance, the upper end of the blade assembly 10 (i.e., the end where the blade component 2 is installed) can drive the entire blade assembly 10 to swing significantly, creating a "top-heavy" pendulum effect. This makes the upper end of the blade assembly 10 extremely sensitive. When encountering areas with significant changes in skin contour, such as the chin or jawline where the skin contour meets the neck, there are many shaving dead zones, resulting in incomplete shaving by the blade assembly 10. This reduces the shaving effect of the blade assembly 10 and greatly diminishes the user experience.

[0060] The third hinge method: with the total height of the blade assembly 10 as the reference, the hinge axis is located in the upper half of the blade assembly 10. Using this hinge method, the upper lever arm of the blade assembly 10 is smaller than the lower lever arm. When the blade assembly 10 contacts the skin, the upper half of the blade assembly 10 swings at a smaller angle, resulting in smoother swing. This allows the stationary blades in the blade assembly 2 to better conform to the skin. Especially when multiple blade assemblies 2 are integrated within the housing 1, the stationary blades in each blade assembly 2 can better adhere to the skin, ensuring the hair-feeding efficiency of each blade assembly 2 and significantly improving the shaving efficiency of the blade assembly 2. Furthermore, because the lever arm of the blade assembly 10 is relatively short, the blade assembly 10 has stronger rigid support when it contacts the skin. For areas with thick beards, coarse beards, or areas that require pressure shaving, such as the chin or the junction of the jaw and neck, where the skin is relatively loose, greater pressure is needed to smooth the skin. The blade assembly 10 with stronger rigid support allows the static blade in the blade assembly 2 to fit more closely to the skin, resulting in fewer shaving dead spots and better shaving performance.

[0061] Based on the results of the above comparative experiments, such as Figure 5 As shown, in this application, a vertical distance H1 (which can be regarded as the total height of the blade assembly 10) is formed between the lowest point of the housing 1 and the highest point of the blade assembly 2. A vertical distance H2 (which can be regarded as the height of the hinge axis) is formed between the hinge axis of the housing 1 and the bracket 3 and the lowest point of the housing 1. With the lowest point of the housing 1 as the reference, H1×0.5≤H2≤H1. During use, when the vertical distance H2 between the hinge axis and the lowest point of the housing 1 is within the range of H1×(0.65~0.75), the static blade of the blade assembly 2 in the blade assembly 10 has the best fit with the skin, the fewest dead angles, and the best shaving effect. Therefore, the third hinge method is the preferred embodiment of this embodiment.

[0062] like Figure 5As shown, due to the significant variations in skin contours on areas such as the chin, jaw, and neck, the head assembly 10 must maintain a preset angle and be locked relative to the main body when shaving these areas so that the user can repeatedly shave them. To ensure the shaving effect of the head assembly 10 when shaving these areas, the included angle S1 formed between the extended lines of the hinge axis of the housing 1 and the bracket 3 is less than or equal to 120°, preferably between 10° and 90°, with the optimal angle between 20° and 30°, using the vertical extension line of the hinge axis of the housing 1 and the bracket 3 as a reference. By setting the included angle S1 between the extended lines of the two ends of the locking groove 4 to less than 120°, the locking angle of the head assembly 10 can be made to meet the trimming needs of different skin contours to the greatest extent, ensuring the fit between the head assembly 10 and the skin and the trimming effect. If the included angle S1 is set too large, such as greater than 140° or 160°, it means that the deflection angle of the head assembly 10 relative to the main body is also larger, resulting in a larger cutting angle when it comes into contact with the skin. This creates a heavier pushing sensation when gliding along the skin, and the friction between the head assembly 2 and the skin is better, causing discomfort to the user's skin. Conversely, if the included angle S1 is set too small, such as 5° or 8°, when facing areas with large skin contours, such as the chin and jaw, the smaller angle limits the contact with the skin, creating dead angles and reducing the hair entry and trimming efficiency of the head assembly 10, resulting in an incomplete shave.

[0063] like Figure 3As shown, the contours of the human face vary, with significant differences in the contours of the sideburns, lips, chin, and jaw. When a user has coarse beard hair or dense hair in certain areas requiring repeated shaving, the razor head assembly 10 needs to be at different trimming angles relative to the main body. In this case, the user can only manually lock the razor head assembly 10 at a preset angle by operating an external control. When dealing with skin areas with different contours, the user needs to frequently manually adjust and lock the razor head assembly 10, which is not conducive to continuous shaving and reduces the user experience. Therefore, at least one adjustment groove 5 is provided at the bottom of the housing 1 to adjust the trimming angle of the housing 1 relative to the main body. The external control is inserted into the adjustment groove 5 in a controllable state, so that the housing 1 is in an adjustable trimming angle position relative to the main body. By adding an adjustment groove 5 to the bottom of the housing 1, the user can insert an external control component into the adjustment groove 5 during use. At this time, the blade assembly 10 cannot automatically adjust the trimming angle according to the skin contour. However, under the combined action of the adjustment groove 5 and the external control component, the blade assembly 10 can maintain a preset trimming angle relative to the main body and lock itself, forming a fixed preset trimming angle. This allows the user to repeatedly shave areas with thick hair or dense beards, ensuring shaving efficiency and trimming effect. In actual use, if the trimming angle of the blade assembly 10 relative to the main body is unsuitable, the user can apply tilted or perpendicular pressure to the blade assembly 10 when it contacts the skin, causing the external control component to slide into the adjacent adjustment groove 5, thus achieving automatic adjustment of the blade assembly 10's trimming angle. Alternatively, the user can directly adjust the blade assembly 10 to the desired trimming angle using their fingers. The specific trimming angle adjustment of the blade assembly 10 is selectable by the user, and this embodiment does not impose further limitations.

[0064] Because the skin contours of areas such as the chin, jaw, and neck vary considerably, when shaving these areas, the head assembly 10 must maintain a preset angle relative to the main body and be locked so that the user can repeatedly shave these areas. To ensure the shaving effect of the head assembly 10 when shaving these areas, the included angle S2 formed between the extended lines of the two ends of the adjustment groove 5 is less than or equal to 120°, preferably between 10° and 90°, with the optimal angle between 20° and 60°, using the vertical extension line of the hinge axis of the housing 1 and the bracket 3 as a reference. By setting the included angle S2 between the two ends of the adjustment groove 5 to less than 120°, the adjustment angle of the head assembly 10 can be made to meet the trimming needs of different skin contours to the greatest extent, ensuring the fit between the head assembly 10 and the skin and the trimming effect. If the included angle S2 is set too large, such as greater than 140° or 160°, it means that the deflection angle of the blade assembly 10 relative to the main body is also larger, resulting in a larger cutting angle when contacting the skin. This creates a heavier pushing sensation when gliding along the skin, and the friction between the blade assembly 2 and the skin is better, causing discomfort to the user's skin. Conversely, if the included angle S2 is set too small, such as 5° or 8°, when facing areas with significant skin contour changes, such as the chin and jaw, the smaller angle limits its ability to contact the skin better, creating dead angles and reducing the hair entry and trimming efficiency of the blade assembly 10, resulting in an incomplete shave. In actual production, the locking groove and adjusting groove have basically the same shape, only differing in width. Please refer to [reference needed]. Figures 3-4 The locking groove structure.

[0065] During use, the blade assembly 10 requires different trimming angles depending on the skin contour to ensure the trimming effect of the blade assembly 10. To adapt to the trimming needs of different skin contour areas, the locking groove 4 is provided with multiple continuously spaced toothed grooves 41, each toothed groove 41 at a different angle to the vertical line of the hinge axis; the external control component can be inserted into any toothed groove 41 in a controllable state, so that the housing 1 is at a preset trimming angle relative to the main body and locked in a non-adjustable locking position. In practical implementation, multiple toothed grooves 41 can be evenly distributed along the maximum swing angle of the blade assembly 10 on both sides of the hinge point at 5°, 10°, 15°, or 20°. During use, the tilt angle of the blade assembly 10 relative to the main body can be adjusted according to the required trimming angle, locking the blade assembly 10 relative to the main body at a preset trimming angle that cannot be adjusted. After trimming a certain local area, the external control can be used to lock it at other trimming angles, achieving continuity in shaving or hair removal and ensuring the skin fit and trimming effect of the blade assembly 10 with different contour areas of the skin. Of course, if a more precise locking angle of the blade assembly 10 is desired, the angle between the toothed grooves 41 and the vertical axis of the hinge can be set smaller. In actual implementation, this can be determined according to customer or market needs, and this embodiment does not impose further limitations.

[0066] In some usage scenarios, the blade assembly 10 requires different trimming angles to conform to the skin contour and ensure the trimming effect. To adapt to the trimming needs of different skin contour areas, the adjustment groove 5 is provided with multiple continuously spaced limiting grooves 51, each limiting groove 51 at a different angle relative to the vertical line of the hinge axis. In specific implementation, multiple limiting grooves 51 can be evenly distributed according to the maximum swing angle of the blade assembly 10 along both sides of the hinge axis, with a reference angle of 5°, 10°, 15°, or 20°. During use, the tilt angle of the blade assembly 10 relative to the main body can be adjusted according to the required trimming angle, so that the blade assembly 10 self-locks to a certain preset trimming angle relative to the main body, ensuring the skin conformity and trimming effect of the blade assembly 10 to different contour areas of the skin. Of course, if a more precise adjustment angle of the blade assembly 10 is desired, the angle between the limiting grooves 51 and the vertical line of the hinge axis can also be set smaller. In actual implementation, it can be determined according to customer or market needs, and this embodiment does not impose further limitations.

[0067] After trimming a certain area, the user can apply pressure with their hand to press the blade assembly 10, or the user can move the blade assembly 10 with their fingers to insert the external control component into any limiting groove 51 under manual operation, so that the housing 1 is in an adjustable trimming angle and self-locking adjustable position relative to the main body, so as to achieve continuous shaving or hair removal.

[0068] like Figure 3 and 6 As shown, when the shaving head assembly 10 glides along the skin, the pressure applied by the user's hand varies. To prevent accidental adjustment of the trimming angle of the shaving head assembly 10 due to varying hand pressure during shaving, two adjustment grooves 5 are provided at the bottom of the housing 1 of the shaving head assembly 10. The two adjustment grooves 5 are located on both sides of the hinge axis. During use, the user operates an external control component to insert into the limiting grooves 51 at the same position in the two adjustment grooves 5, thereby increasing the self-locking force of the shaving head assembly 10 relative to the main body and preventing accidental adjustment of the trimming angle due to user hand pressure, thus improving the stability of the trimming angle adjustment of the shaving head assembly 10. Of course, for the sake of stability of the trimming angle adjustment, only one adjustment groove 5 can be provided, and increasing the elasticity of the elastic element 33 can also achieve a similar technical effect. However, providing two adjustment grooves 5, located on both sides of the hinge axis of the shaving head assembly, can improve the stability of both sides of the shaving head assembly 10 during adjustment. Therefore, this embodiment is the preferred embodiment.

[0069] In actual implementation, the bottom of the housing 1 in the cutter head assembly 10 is arc-shaped. When the cutter head assembly 10 swings along any direction or at any trimming angle along the hinge axis, the distance between the bottom of the housing 1 and the external control components remains equal, ensuring the self-locking performance of the adjustment groove 5 and the locking groove 4. To ensure the locking stability of the cutter head assembly 10 when locked relative to the main body, the locking groove 4 is located between the two adjustment grooves 5, and the three are spaced apart and parallel to each other, forming on the outer surface of the bottom of the housing 1 along the thickness direction of the housing 1. Arranging the two adjustment grooves 5 and the locking groove 4 in parallel and spaced intervals can reduce the interference between them during adjustment or locking, and improve the working stability of the cutter head assembly 10 in the adjustment or locking position.

[0070] like Figure 1 , 2 As shown in Figures 5 and 6, to increase the contact area between the shaving head assembly 10 and the skin, and to improve the hair-feeding efficiency and trimming effect of the shaving head assembly 10, multiple shaving head assemblies 2 are provided inside the housing 1. These multiple shaving head assemblies 2 are arranged side-by-side along the same horizontal line, diagonal line, or arc within the shaving head seat 6, and are movably connected to the shaving head seat 6. When an external force is applied to the shaving head assembly 2, each shaving head assembly 2 can move vertically relative to the shaving head seat 6. When multiple shaving head assemblies 2 are integrated into the shaving head assembly 10 and installed side-by-side along the same horizontal line or diagonal line within the housing 1, during shaving, the stationary blades in each shaving head assembly 2 can contact the skin individually, thereby improving the hair-feeding efficiency and beard trimming efficiency of the shaving head assembly 10 during a single trimming session.

[0071] like Figure 5 As shown, in some specific embodiments, in order to ensure that the blade assembly 10 swings more smoothly along the hinge axis, has better fit with the skin, and prevents the blade assembly 10 from shaking, the hinge axis of the housing 1 and the bracket 3 is close to the bottom end face of the blade seat 6 and below the bottom end face of the blade seat 6 (approaching the bottom end face of the blade seat 6), or flush with the bottom end face of the blade seat 6. The hinge axis between the blade assembly 10 and the bracket 3 is set below or flush with the bottom surface of the blade holder 6 of the assembled blade assembly 2. This relatively shortens the lever arm length of the upper part of the hinge axis of the blade assembly 10. Furthermore, since the blade assembly 2 is basically installed at the upper end of the blade assembly 10, the blade assembly 10 is more stable when swinging along the hinge axis when the blade assembly 2 in the blade assembly 10 contacts the skin. Moreover, when the outer surface of each blade assembly 2 contacts the skin, it will not wobble due to the heavier lower end of the blade assembly 10. This improves the stability of the blade assembly 10 in contact with the skin, makes hair insertion smoother, and ensures the beard trimming performance of the blade assembly 10.

[0072] While arranging multiple blade assembly 2 along the same horizontal or diagonal line increases the contact area between the blade assembly 10 and the skin, improving hair removal efficiency, it also increases the width of the blade assembly 10. This results in higher hair removal and shaving efficiency when facing areas with relatively flat skin contours. However, when facing areas with significant skin contour variations, such as the chin and jawline, the hair removal efficiency of the blade assembly 10 decreases due to the limitations imposed by the skin contour. Therefore, this embodiment also proposes another arrangement, such as... Figure 5 As shown, the housing 1 contains multiple blade assembly 2, arranged side-by-side along an arc. In practice, the arc can be either convex or concave. When the arc is convex, the blade assembly 2 on both sides is lower than the middle blade assembly 2, allowing for better gliding shaving on areas such as the chin, jawline, and neck. When the arc is concave, the middle blade assembly 2 is lower than the side blade assemblies 2, forming a U-shaped or V-shaped structure. When shaving areas with prominent contours like the chin or jawline, the concave blade assembly 2 can surround them, resulting in better skin contact and shaving performance. However, on flat skin areas, the middle blade assembly 2 is suspended, negatively impacting hair entry and shaving efficiency. Therefore, both arrangements have their advantages and disadvantages; this embodiment does not impose a specific limitation and can be determined according to user needs.

[0073] Furthermore, each of the aforementioned cutter head assemblies 2 is movably connected to the cutter head holder 6, such as... Figure 2 As shown, guide grooves 61 are provided on the side walls at both ends of the blade head seat 6, and guide blocks 21 are provided at both ends of the blade head assembly 2. The length of the guide grooves 61 is greater than the length of the guide blocks 21. When the blade head assembly 2 contacts the skin and is subjected to skin pressure, each blade head assembly 2 can move up and down relative to the blade head seat 6 along the guide grooves 61. In this way, the up and down floating can be used to adapt to the contour changes of the skin, so as to ensure that each blade head assembly 2 can fit better with the skin, thereby improving the hair entry efficiency and beard trimming efficiency of each blade head assembly 2.

[0074] To ensure the smooth swing of the cutter head assembly 10 relative to the thickness of the main body, such as Figure 7As shown, the bracket 3 has two right-angle bends. The upper end is a vertical plate with hinge holes. Both ends of the housing 1 are hinged to the bracket 3 via pins inserted into these hinge holes. The lower end of the bracket 3 is a bent plate with fixing holes, which are detachably fixed to the main body via screws. By setting two brackets 3 and hinged to both ends of the housing 1, when the brackets 3 are fixed to the main body, the blade assembly 10 can be suspended relative to the main body. When the blade assembly 10 contacts the skin, it can automatically swing to conform to the skin contour, improving the fit between the blade assembly 10 and the skin, and enhancing the hair-feeding and trimming efficiency of the blade assembly 10. Of course, for the hinge requirement of the cutter head assembly 10, only one bracket 3 can be set. A transverse hinge arm is set at the upper end of the bracket 3, and a connecting fastening arm is set at the lower end of the bracket 3. One end of the transverse hinge arm and the connecting fastening arm are connected as one piece by a support rod. During assembly, the transverse hinge arm is inserted into the housing 1 and the housing 1 is hinged. The connecting fastening arm can be straight, V-shaped or Y-shaped and connected to the main body by screws. Similarly, the cutter head assembly 10 can be suspended and hinged relative to the main body. However, setting two brackets 3 provides better support rigidity and stability. Therefore, using two brackets 3 is the preferred embodiment of this example.

[0075] Based on the aforementioned blade assembly 10, this application also proposes a technical solution for a trimming tool, such as... Figures 8-15 As shown, the device includes the aforementioned blade assembly 10 with multiple dynamically adjustable trimming angles. The main body of the blade assembly 10 is the trimming tool body 20, and the external control component is the gear adjustment component 30 installed within the body 20. During assembly, one end of the bracket 3 is fixedly connected to the body 20 with screws, suspending the blade assembly 10 above the body 20, creating a swing gap between the blade assembly 10 and the body 20. The gear adjustment component 30 is installed inside the body 20 and can move vertically relative to the body 20 under manual user control. When shaving after assembly, the blade assembly 10 slides along the skin. Under the action of the bracket 3 and the hinge shaft, the blade assembly 10 can swing freely according to the skin contour to conform to the skin, forming a free-position state. This not only improves the conformity between the blade assembly 10 and the skin, but also increases the contact area between the blade assembly 10 and the skin. Consequently, the hair-gathering efficiency of the blade assembly 10 is significantly increased, improving the beard trimming effect of the blade assembly 10.

[0076] When dealing with areas of prominent skin contours, such as the chin and jawline, where repeated trimming at a fixed angle between the blade assembly 10 and the body 20 is required, the user can manipulate the gear adjustment component 30 to move upwards relative to the body 20. This causes the gear adjustment component 30 to insert into the locking groove 4, locking the blade assembly 10 at the preset trimming angle relative to the body 20, thus creating a locked gear position. Figure 10As shown. This allows the user to hold the trimming tool and repeatedly shave a specific area of ​​skin with a prominent contour to ensure the trimming effect of the tool.

[0077] Due to individual factors, some people have coarser or thicker beards, and a single trimming tool may not be able to shave them cleanly. The shaving head assembly 10 needs to be used repeatedly at a preset trimming angle to shave the beard cleanly. In this case, the gear adjustment component 30 can be controlled by hand to slide relative to the body 20, thereby driving the shaving head assembly 10 to lock relative to the body 20 at a preset trimming angle to repeatedly shave and ensure the trimming effect.

[0078] like Figures 14-15 As shown, to achieve locking of the shaving head assembly 10 relative to the body 20 at a preset trimming angle, the gear adjustment component 30 includes a locking tooth 31. When external force is applied to the gear adjustment component 30, the locking tooth 31 can insert into any slot 41 within the locking groove 4, causing the shaving head assembly 10 to be locked in a preset trimming angle relative to the body 20. By providing the locking tooth 31 on the gear adjustment component 30 and providing multiple slots 41 at preset angles within the locking groove 4, when it is necessary to maintain the shaving head assembly 10 relative to the body 20 at a preset trimming angle for repeated shaving of specific skin areas, the user can push the gear adjustment component 30, causing the locking tooth 31 to insert into any slot 41 located at the bottom of the housing 1. With the locking teeth 31 and the groove 41 in cooperation, the head assembly 10 can be locked at a certain preset trimming angle relative to the body 20, which makes it convenient for the user to operate the head assembly 10 to repeatedly shave certain special skin areas and ensure the trimming effect of the trimming tool.

[0079] like Figures 14-15As shown, to facilitate adjustment of the trimming angle of the blade assembly 10 relative to the body 20, the gear adjustment component 30 includes an adjustment tooth 32, with an elastic element 33 at the bottom of the adjustment tooth 32. When an external force is applied to the gear adjustment component 30, the adjustment tooth 32 can be inserted into any of the limiting slots 51 within the adjustment groove 5, so that the blade assembly 10 is in an adjustable trimming angle state relative to the body 20, and is self-locked under the action of the elastic element 33. By setting the adjustment tooth 32 on the gear adjustment component 30 and setting multiple limiting slots 51 in the adjustment groove 5 at the bottom of the housing 1, when it is necessary to maintain the blade assembly 10 relative to the body 20 at a certain preset trimming angle for special skin areas, or to repeatedly shave hard or thick beards, the user can push the gear adjustment component 30 to drive the adjustment tooth 32 into any of the limiting slots 51 at the bottom of the housing 1. With the adjustment teeth 32 and the limiting groove 51 in coordination, the blade assembly 10 can be at a preset trimming angle relative to the body 20 and lock itself, making it convenient for users to repeatedly shave special skin areas, hard beards, or thick beards at a preset trimming angle, ensuring the beard trimming effect of the trimming tool.

[0080] like Figure 15 As shown, an elastic element 33 is added to the bottom of the adjusting tooth 32. When the user manually drives the gear adjustment component 30 to insert the adjusting tooth 32 into the limiting groove 51, the elastic element 33 can continuously support the adjusting tooth 32, so that the blade assembly 10 self-locks at a certain preset trimming angle. During continuous shaving, when the user needs to adjust the trimming angle of the blade assembly 10 relative to the body 20, there are two ways to achieve this. First, the user manually presses the blade assembly 2. When the force applied by the hand is greater than the supporting force of the elastic element 33, the adjusting tooth 32 can compress the elastic element 33 and slide it from one limiting groove 51 into the other limiting groove 51, thereby changing the preset trimming angle of the blade assembly 10 relative to the body 20. When the force applied by the hand disappears, the elastic element 33 can support the adjusting tooth 32 in the limiting groove 51 to achieve self-locking of the blade head at the trimming angle, so that the trimming angle can be dynamically adjusted without turning off the machine. Secondly, the user can directly move the blade assembly 10 to slide the adjusting tooth 32 into the limiting groove 51 of the required trimming angle, achieving dynamic adjustment of the trimming angle without turning off the machine.

[0081] like Figure 13As shown, since the cutter head assembly 10 has a free gear state, an adjustable gear state, and a locked gear state relative to the machine body 20, in order to facilitate free switching between the three working states and prevent state changes under non-human control, a slide groove 21 is provided on the machine body 20. On the back of the slide groove 21, there are three vertically spaced free gear grooves 22, adjustable gear grooves 23, and locked gear grooves 24. The gear adjustment component 30 includes a button 34 and a gear tooth 35. The button 34 is located outside the machine body 20 and is placed in the slide groove 21, where it is movably engaged with the machine body 20. The gear tooth 35 is placed inside the machine body 20 and linked to the button 34. When the button 34 is moved up and down along the slide groove 21 by external force, the gear tooth 35 can be inserted into the free gear groove 22, the adjustment gear groove 23 or the locking gear groove 24, and drive the adjustment tooth 32 or the locking tooth 31 to be inserted into the adjustment groove 5 or the locking groove 4, so that the cutter head assembly 10 can switch freely between the free gear state, the adjustment gear state or the locking gear state relative to the machine body 20. By setting a slide groove 21 in the machine body 20 and setting a free stop groove 22, an adjustment stop groove 23 and a locking stop groove 24 on the back of the slide groove 21; a button 34 and a stop tooth 35 are provided in the gear adjustment component 30. In the initial state, the stop tooth 35 is in the free stop groove 22. When the user's finger drives the button 34 to move relative to the slide groove 21, the button 34 can simultaneously drive the stop tooth 35 to move and lock into the adjustment stop groove 23 or the locking stop groove 24, and drive the adjustment tooth 32 or the locking tooth 31 to simultaneously insert into the limiting groove 51 or the tooth groove 41, the trimming angle of the cutter head assembly 10 relative to the machine body 20 is fixed, so as to prevent the trimming angle of the cutter head assembly 10 from changing under non-human control. The free position, adjustable position, and locked position are all achieved by the user's finger driving the button 34 up and down. The bottom is the free position. When moving upward, the gear tooth 35 can be engaged in the adjustable position groove 23, and the adjustable tooth 32 is inserted into the limiting groove 51 of the adjustable groove 5, so that the cutter assembly 10 is in the adjustable position with an adjustable preset trimming angle. When the user drives the button 34 upward again, the gear tooth 35 disengages from the adjustable position groove 23 and engages in the locking position groove 24. At the same time, the locking tooth 31 is inserted into the tooth groove 41 of the locking groove 4. Since there is no support spring at the bottom of the locking tooth 31, under the restriction of the gear tooth 35 and the locking position groove 24, the locking tooth 31 will be firmly locked in the tooth groove 41 of the locking groove 4, so that the trimming tool is in the locked position. When the cutter assembly 10 is subjected to external force, the trimming angle relative to the machine body 20 cannot change.

[0082] like Figure 14As shown, to prevent the gear tooth 35 from disengaging from the free gear groove 22, the adjusting gear groove 23, and the locking gear groove 24 without human control, a release plate 36 is provided on the outer surface of the gear tooth 35, and a linkage hole 37 is provided in the button 34. One end of the release plate 36 is connected to the gear tooth 35 as a whole, and the other end passes through the linkage hole 37 so that the release plate 36 can move up and down along the slide groove 21 synchronously with the button 34. When the release plate 36 is pressed by external force, the gear tooth 35 can disengage from the free gear groove 22, the adjusting gear groove 23, or the locking gear groove 24, and when the external force disappears, the gear tooth 35 can be locked into the free gear groove 22, the adjusting gear groove 23, or the locking gear groove 24 and form a self-locking mechanism. During use, when the cutter head assembly 10 needs to change gears, the user presses the release plate 36 with their finger, causing the end of the gear tooth 35 to bend and deform. At this time, the gear tooth 35 can disengage from the free gear groove 22, the adjustment gear groove 23, or the locking gear groove 24. Then, the user can move the finger-driven button 34 upward to switch the working gear state of the cutter head assembly 10. When the external force of the finger pressing on the release plate 36 disappears, the end of the gear tooth 35 can automatically reset and lock into the corresponding gear groove, realizing the self-locking of the gear tooth 35 and the corresponding gear groove, and preventing the working gear state of the cutter head assembly 10 from changing under non-human operation.

[0083] Secondly, although the release plate 36 can prevent the gear teeth 35 from disengaging from the corresponding gear slots, ensuring the gear operation stability of the cutter head assembly 10; at the same time, since the release plate 36 is inserted into the linkage hole 37 of the button 34, when the button 34 is driven by the user's finger to move up and down along the slide groove 21, under the cooperation of the release plate 36 and the linkage hole 37, the gear teeth 35 can move synchronously with the button 34, realizing the dual function of gear shifting and self-locking of the gear teeth 35.

[0084] like Figures 14-15 As shown, since the adjusting tooth 32, locking tooth 31, and gear tooth 35 all change position synchronously when the user operates the button 34, in order to facilitate production and ensure the synchronicity of the adjusting tooth 32, locking tooth 31, and gear tooth 35, the locking tooth 31, adjusting tooth 32, and gear tooth 35 are integrated into the adjusting slider 40. By integrating the locking tooth 31, adjusting tooth 32, and gear tooth 35 into the adjusting slider 40, they can be integrally formed by injection molding, casting, or stamping bending processes during production (of course, they can also be produced separately and combined into one piece using welding processes). This improves production efficiency and enhances the displacement synchronicity of the adjusting tooth 32, locking tooth 31, and gear tooth 35, ensuring the working stability of the cutter head assembly 10 when freely switching between the three working states.

[0085] like Figures 14-15As shown, to prevent the locking tooth 31 from loosening within the tooth groove 41 inserted into the locking groove 4 and affecting the locking effect of the cutting head assembly 10's trimming angle, the adjusting slider 40 has a top panel 41, a front panel 42, two side panels 43 connecting the top panel 41 and the front panel 42, and a latching plate 44; the locking tooth 31 is located in the top panel 41, with one end fixed to the top panel 41 as a whole, and the other end can be elastically bent and deformed and can be inserted into the locking groove 4 to lock the cutting head assembly 10 relative to the machine body 20; by setting one end of the locking tooth 31 to be elastically bent and deformable, when the button 34 is driven by the user's finger to move upward along the slide groove 21 When the shifting tooth 35 is engaged in the locking groove 24, and the cutter head assembly 10 is in a locked position relative to the machine body 20, one end of the locking tooth 31 is slightly bent and deformed and inserted into the tooth groove 41 of the locking groove 4. The bending deformation force of the locking tooth 31 makes the locking tooth 31 continuously inserted into the tooth groove 41 to achieve self-locking. Furthermore, under the action of the bending deformation force of the locking tooth 31, a reverse preload force can also be applied to the shifting tooth 35 and the locking groove 24, forming a double limiting effect on the shifting tooth 35 and the locking groove, ensuring the limiting stability and limiting reliability of the locking tooth 31, the locking groove 4, the shifting tooth 35 and the locking groove 24.

[0086] To achieve self-locking between the gear shift tooth 35 and the free gear groove 22, the adjusting gear groove 23, or the locking gear groove 24, one end of the gear shift tooth 35 is fixed to the front panel 42 in one piece, while the other end can be elastically bent and deformed to engage with the free gear groove 22, the adjusting gear groove 23, or the locking gear groove 24 when the release plate 36 is under force, thus forming a self-locking mechanism. By making one end of the gear shift tooth 35 elastically bendable and deformable, when the gear shift tooth 35 is pressed by the release plate 36, One end of the shift tooth 35 can be elastically bent and deformed, allowing the end of the shift tooth 35 to disengage from the free shift groove 22, the adjusting shift groove 23, or the locking shift groove 24. With the movement of the button 34, the shift tooth 35 can be moved to the side of the desired shift groove. Then, by releasing the release plate 36, the shift tooth 35 can be engaged in the desired shift groove (i.e., the free shift groove 22, the adjusting shift groove 23, or the locking shift groove 24), thus switching the shift working state of the cutter head assembly 10. Because one end of the shift tooth 35 can be bent and deformed, when the user releases the release plate 36, the shift tooth 35 can automatically reset and self-lock in the corresponding shift groove, ensuring the working stability and reliability of the cutter head assembly 10 in the corresponding shift working state.

[0087] Since the gear shifting tooth 35 is synchronized with the button 34 through the engagement of the release plate 36 and the linkage hole 37, to improve the connection strength and operational reliability between the button 34 and the gear shifting tooth 35, the button 34 is snapped into the front panel 42 through the slide groove 21. After the button 34 is assembled, this not only prevents the release plate 36 from disengaging from the linkage hole 37 of the button 34, ensuring the connection strength and synchronous movement of the gear shifting tooth 35 and the button 34, but also prevents the button 34 from sliding out of the slide groove 21 of the housing 1, improving the adjustment reliability and operational stability of the button 34. The snap-fit ​​connection is a conventional and common technology and will not be described in detail in this embodiment.

[0088] When the blade assembly 10 is in the adjustable preset trimming angle adjustment position, the user may need to adjust the trimming angle of the blade assembly 10 multiple times when shaving, depending on the skin contour. In order to facilitate the assembly of the adjustment teeth 32 and the self-locking when adjusting the trimming angle of the blade assembly 10, the adjustment teeth 32 are provided in two and are respectively installed in the chambers 45 in the side panel 43. The elastic element 33 is placed in the chambers 45 to support the adjustment teeth 32 so that one end of the adjustment teeth 32 passes through the top panel 41 and is placed outside the top panel 41. The buckle plate 44 is snapped to the side panel 43 to close the chambers 45. By providing a chamber 45 in the side panel 43, the elastic element 33 can be placed in the chamber 45 and supported under the adjusting tooth 32 during assembly. The adjusting tooth 32 and the elastic element 33 are then fixed in the chamber 45 using a snap-fit ​​plate 44. This not only facilitates the assembly of the adjusting tooth 32 and ensures its assembly reliability, but also provides a continuous supporting force to the adjusting tooth 32 when it is inserted into the limiting groove 51 of the adjusting groove 5, enabling the adjusting tooth 32 to self-lock and ensuring that the cutter head assembly 10 remains at the desired preset trimming angle. When it is necessary to change the preset trimming angle of the cutter head assembly 10, the user can directly move the cutter head assembly 10 to overcome the supporting force of the elastic element 33, causing the adjusting tooth 32 to slide into the desired limiting groove 51 and self-lock, thus adjusting the preset trimming angle of the cutter head assembly 10.

[0089] like Figure 13As shown, during beard trimming, the user engages the gear tooth 35 into the adjustment groove 23 using the control button 34, placing the blade assembly 10 in the adjustment position relative to the body 20. Given varying skin contours, the user may need to manually adjust the preset trimming angle of the blade assembly 10 multiple times. To prevent the gear tooth 35 from disengaging from the adjustment groove 23 under external force during adjustment, thus affecting the stability of the blade assembly 10's trimming angle adjustment, limiting lugs 46 are provided on the outer sides of the two side panels 43 of the adjustment slider 40. An arc-shaped protrusion 47 is located in the middle of each limiting lug 46. A stop block 25 extending along the inner wall is provided on both sides of the inner wall of the body 20, with an arc-shaped groove 26 within each stop block 25. The arc-shaped protrusion 47 can slide into the arc-shaped groove 26 when activated by the button 34. By setting a corresponding stop block 25 on the inner wall of the machine body 20, and providing an arc-shaped groove 26 on the stop block 25, when the user drives the button 34 to move upward along the slide groove 21 and causes the stop tooth 35 to engage in the adjustment groove 23, the arc-shaped protrusion 47 located in the middle of the limiting lugs 46 on both sides of the adjustment slider 40 can slide into the arc-shaped groove 26 accordingly. The arc-shaped groove 26 and the arc-shaped protrusion 47 form a limiting effect, which can provide double limiting protection for the stop tooth 35 and the adjustment groove 23, preventing the stop tooth 35 from disengaging and sliding out of the adjustment groove 23 when the cutting angle of the cutter head assembly 10 is adjusted by external force, thus ensuring the working stability and reliability of the cutter head assembly 10 in the adjustment state.

[0090] like Figure 12 As shown, since most existing trimming tools use a one-piece injection molded plastic body 20, some unnecessary deformation occurs when the user presses the release plate 36 or button 34. To prevent deformation from affecting the fit accuracy of the adjusting teeth 32, locking teeth 31, or gear teeth 35 with their corresponding structures, thus impacting the working stability of the cutter head assembly 10 in the free, adjusted, and locked positions, a top support block 27 is provided inside the body 20. This top support block 27 is detachably connected to the body 20 and is located behind the adjusting slider 40. By providing the top support block 27 inside the body 20, when the user presses the button 34 or release plate 36, the support formed by the top support block 27 on the back reduces or prevents unnecessary plastic deformation of the body, ensuring the fit accuracy of the gear teeth 35, adjusting teeth 32, and locking teeth 31 with their corresponding structures, and ensuring the working stability of the cutter head assembly 10 in any working state.

[0091] The above embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A blade assembly with a multi-level dynamically adjustable trimming angle, comprising a housing (1) and at least one blade assembly (2) installed within the housing (1), wherein the outer surface of the blade assembly (2) is located outside the housing (1) and can contact the skin surface; characterized in that It also includes at least one bracket (3), one end of which is connected to the main body, and the other end of the shell (1) is hinged to the bracket (3), so that the shell (1) is suspended relative to the main body, and the shell (1) can swing freely relative to the thickness direction of the main body with the hinge axis as the center. At least one locking groove (4) is provided on the housing (1) to lock the housing (1) relative to the main body at different trimming angles. An external control component is inserted into the locking groove (4) in a controllable state, so that the housing (1) is in a preset trimming angle relative to the main body and is in a self-locking locking position.

2. The blade assembly with multi-level dynamically adjustable trimming angle as described in claim 1, characterized in that... A vertical distance H1 is formed between the lowest point of the housing (1) and the highest point of the cutter head assembly (2), and a vertical distance H2 is formed between the hinge axis of the housing (1) and the bracket (3) and the lowest point of the housing (1); wherein, with the lowest point of the housing (1) as the reference, H1×0.5≤H2≤H1.

3. The blade assembly with multi-level dynamically adjustable trimming angle as described in claim 1, characterized in that... With the hinge axis of the housing (1) and the bracket (3) as the reference, the included angle S1 formed between the extended lines of the two ends of the locking groove (4) is less than or equal to 120°.

4. The blade assembly with multi-level dynamically adjustable trimming angle according to claim 1, characterized in that... At least one adjustment groove (5) is provided at the bottom of the housing (1) to adjust the housing (1) to different trimming angles relative to the main body. The external control component is inserted into the adjustment groove (5) in a controllable state so that the housing (1) is in the adjustable trimming angle adjustment position relative to the main body.

5. The blade assembly with multi-level dynamically adjustable trimming angle according to claim 4, characterized in that... With the hinge axis of the shell (1) and the bracket (3) as the reference, the included angle S2 formed between the extended lines of the two ends of the adjustment groove (5) is less than or equal to 120°.

6. The blade assembly with multi-level dynamically adjustable trimming angle according to claim 1, characterized in that... The locking groove (4) is provided with multiple continuously spaced toothed grooves (41), and each toothed groove (41) is at a different angle to the vertical line of the hinge shaft; the external control component can be inserted into any toothed groove (41) in a controllable state, so that the housing (1) is at a preset trimming angle relative to the main body and locked in a non-adjustable locking position.

7. The blade assembly with multi-level dynamically adjustable trimming angle according to claim 4, characterized in that... The adjustment groove (5) is provided with multiple continuously spaced limiting grooves (51), and each limiting groove (51) is at a different angle relative to the vertical line of the hinge axis; the external control component can be inserted into any limiting groove (51) in a controllable state, so that the housing (1) is in an adjustable position with an adjustable trimming angle and self-locking relative to the main body.

8. The cutter head assembly with multi-level dynamically adjustable trimming angle according to claim 4, characterized in that... Two adjustment grooves (5) are provided, and the locking groove (4) is located between the two adjustment grooves (5) and the three are spaced apart and parallel to each other, and are set on the outer surface of the bottom of the shell (1) along the thickness direction of the shell (1).

9. The blade assembly with multi-level dynamically adjustable trimming angle according to claim 1, characterized in that... Multiple cutter head assemblies (2) are provided inside the housing (1). The multiple cutter head assemblies (2) are arranged side by side in the cutter head seat (6) along the same horizontal line, diagonal line or arc, and are movably connected to the cutter head seat (6). When an external force is applied to the cutter head assembly (2), each cutter head assembly (2) can move up and down relative to the cutter head seat (6).

10. The blade assembly with multi-level dynamically adjustable trimming angle according to claim 9, characterized in that... The hinge axis of the housing (1) and the bracket (3) is close to the bottom surface of the cutter head seat (6) and below or flush with the bottom surface of the cutter head seat (6).

11. The blade assembly with multi-level dynamically adjustable trimming angle according to claim 1, characterized in that... The bracket (3) has two right-angle bends, the upper end of which is a vertical plate with a hinge hole. The two ends of the housing (1) are respectively inserted into the hinge hole by pins so that the two ends of the housing (1) are respectively hinged to the bracket (3). The lower end of the bracket (3) is a bent plate with a fixing hole and is detachably fixed to the main body by screws.

12. A trimming tool, characterized in that... The invention includes a blade assembly (10) with a multi-level dynamically adjustable trimming angle as described in any one of claims 1 to 11 and a body (20); a gear adjustment member (30) that can be displaced relative to the body (20) is installed inside the body (20); One end of the bracket (3) is connected to the machine body (20) so that the cutter head assembly (10) is mounted above the machine body (20) and forms a swing gap between the cutter head assembly (10) and the machine body (20), and the cutter head assembly (10) is in a free swinging position relative to the machine body (20) with the hinge axis as the center; and, When an external force is applied to the gear adjustment component (30) and drives the gear adjustment component (30) to insert into the locking groove (4), the cutter assembly (10) is in a locked gear state with a preset trimming angle self-locking relative to the machine body (20).

13. The pruning tool according to claim 12, characterized in that... The gear adjustment component (30) includes a locking tooth (31). When an external force is applied to the gear adjustment component (30), the locking tooth (31) can be inserted into any tooth groove (41) in the locking groove (4), so that the cutter assembly (10) is in a self-locking state with a preset trimming angle relative to the machine body (20).

14. The pruning tool according to claim 12, characterized in that... The gear adjustment component (30) includes an adjustment tooth (32), and an elastic element (33) is provided at the bottom of the adjustment tooth (32); when an external force is applied to the gear adjustment component (30), the adjustment tooth (32) can be inserted into any limiting groove (51) in the adjustment groove (5), so that the cutter assembly (10) is in an adjustable gear state with an adjustable trimming angle relative to the machine body (20), and is self-locked under the action of the elastic element (33); and, When an external force is applied to the cutter head assembly (10), the adjusting tooth (32) can drive the elastic element (33) to elastically contract and slide into any limiting groove (51), so that the cutting angle of the cutter head assembly (10) relative to the machine body (20) changes and self-locks.

15. The pruning tool according to claim 12, characterized in that... A slide groove (21) is provided on the body (20), and three spaced free stop grooves (22), adjustment stop grooves (23) and locking stop grooves (24) are provided on the back of the slide groove (21); the gear adjustment component (30) includes a button (34) and a gear tooth (35). The button (34) is located outside the body (20) and placed in the slide groove (21) and is movably engaged with the body (20); The gear tooth (35) is placed inside the machine body (20) and linked to the button (34). When the button (34) is moved up and down along the slide groove (21) by external force, the gear tooth (35) can be inserted into the free gear groove (22), the adjustment gear groove (23) or the locking gear groove (24), and drive the adjustment tooth (32) or the locking tooth (31) to insert into the adjustment groove (5) or the locking groove (4), so that the cutter head assembly (10) can switch freely between the free gear state, the adjustment gear state or the locking gear state relative to the machine body (20).

16. The pruning tool according to claim 15, characterized in that... A grooved piece (36) is provided on the outer surface of the gear tooth (35), and a linkage hole (37) is provided in the button (34). One end of the grooved piece (36) is connected to the gear tooth (35) as a whole, and the other end passes through the linkage hole (37) so that the grooved piece (36) can move up and down along the slide groove (21) synchronously with the button (34). When an external force presses the release plate (36), the gear tooth (35) can disengage from the free gear groove (22), the adjusting gear groove (23), or the locking gear groove (24), and when the external force disappears, the gear tooth (35) can be locked into the free gear groove (22), the adjusting gear groove (23), or the locking gear groove (24) and form a self-locking mechanism.

17. The pruning tool according to any one of claims 12 to 16, characterized in that... Locking teeth (31), adjusting teeth (32) and gear teeth (35) are integrated into the adjusting slider (40). The adjusting slider (40) has a top panel (41), a front panel (42), two side panels (43) connecting the top panel (41) and the front panel (42) and a buckle plate (44). The locking teeth (31) are located in the top panel (41), one end of which is fixed to the top panel (41) as a whole, and the other end can be elastically bent and deformed and can be inserted into the locking groove (4) to lock the cutter head assembly (10) relative to the machine body (20). The gear tooth (35) is located in the front panel (42), one end of which is fixed to the front panel (42) as a whole, and the other end can be elastically bent and deformed when the release plate (36) is subjected to force and be inserted into the free gear groove (22), the adjustment gear groove (23) or the locking gear groove (24) to form a self-locking; the button (34) passes through the slide groove (21) and is snapped to the front panel (42); Two adjusting teeth (32) are provided and installed in the chambers (45) in the side panel (43). The elastic element (33) is placed in the chamber (45) to support the adjusting teeth (32) so that one end of the adjusting teeth (32) passes through the top panel (41) and is placed outside the top panel (41). The buckle plate (44) is snapped to the side panel (43) to seal the chamber (45).

18. The pruning tool according to claim 17, characterized in that... Limiting lugs (46) are provided on the outside of the two side panels (43) of the adjusting slider (40). An arc-shaped protrusion (47) is provided in the middle of each limiting lug (46). A stop block (25) extending along the inner wall is provided on both sides of the inner slide of the body (20). An arc-shaped groove (26) is provided in the stop block (25). The arc-shaped protrusion (47) can slide into the arc-shaped groove (26) under the action of the button (34).

19. The pruning tool according to claim 17, characterized in that... A top support block (27) is provided inside the body (20), which is detachably connected to the body (20) and is located behind the adjusting slider (40).

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