Shaver with gear-adjustable double-layer blade structure

Abstract

A shaver with a gear-adjustable double-layer blade structure comprises a shaver handle, a cam, a cylindrical rotating part rotationally connected to the shaver handle and integrally formed on the cam, and a protruding block set integrally formed on the rotating part and composed of a plurality of protruding blocks. The extension lengths of any two convex blocks in the convex block group along the radial direction of the rotating part are different; the knife rest is located in the knife handle, the knife rest comprises a gear shifting hole integrally formed with a positioning groove, the first blade is fixedly connected to the knife rest, and the second blade is fixedly connected to the knife rest and located on the side, away from the gear shifting hole, of the first blade; the rotating part penetrates into the gear shifting hole, any protruding block abuts against the positioning groove, the cam is rotated to switch the protruding blocks to abut against the positioning groove, and the tool rest is driven to move in the first direction perpendicular to the extending direction of the rotating part.

Description

Technical Field

[0001] This utility model relates to the field of personal care products, and in particular to a razor with an adjustable double-layer blade structure. Background Technology

[0002] A razor typically consists of a handle and a blade holder. The handle is the part that the user holds and has a guard plate, while the blade holder is used to hold the blades and guide them to contact the skin during shaving.

[0003] Currently, most razors on the market use a fixed handle design. With this design, the gap between the blade on the handle and the guard plate cannot be adjusted. Because the gap is fixed, the razor cannot adjust the shaving depth according to beard length or coarseness. If the gap is too large, more of the blade is exposed, increasing the contact area with the skin. This makes the razor sharper, but prolonged use of a sharp blade can lead to excessive friction and skin irritation. If the gap is too small, less of the blade is exposed, resulting in a smaller contact area with the skin and a less sharp blade, leading to an incomplete shave. Furthermore, most razors on the market use a single-blade design. This design is inefficient when shaving thick beards, requiring repeated shaving to achieve a clean shave.

[0004] Therefore, it is necessary to provide a razor with an adjustable double-blade structure that can effectively improve shaving efficiency and effectively adjust the gap between the razor holder and the guard plate. Utility Model Content

[0005] The purpose of this invention is to provide a razor with an adjustable double-layer blade structure that can effectively improve shaving efficiency and effectively adjust the distance between the razor holder and the guard plate.

[0006] According to one aspect of this application, a razor with an adjustable double-blade structure is provided, the razor comprising:

[0007] Handle

[0008] A cam is rotatably connected to the tool holder. A cylindrical rotating part is integrally formed on the cam, and a group of protrusions, consisting of several protrusions, is integrally formed on the rotating part. When viewed along the extension direction parallel to the rotating part, any two protrusions in the group extend radially along the rotating part by different lengths.

[0009] The tool holder is located in the tool handle. The tool holder includes an adjustment hole integrally formed with a positioning groove, a first blade fixedly connected to the tool holder, and a second blade fixedly connected to the tool holder and located on the side of the first blade opposite to the adjustment hole.

[0010] The rotating part passes through the adjusting hole, and any protrusion abuts against the positioning groove. The cam is rotated to switch the protrusion abutting against the positioning groove, and the tool holder is driven to move in a first direction perpendicular to the extension direction of the rotating part.

[0011] More preferably, the knife handle includes an upper handle body and a lower handle body fixedly connected to the upper handle body and threadedly connected to the upper handle body;

[0012] The tool holder is embedded in the upper handle and extends into the lower handle.

[0013] More preferably, the tool holder further includes:

[0014] A limiting rod is fixedly connected to the tool holder;

[0015] A clip is fixedly connected to the limiting rod and is located between the first blade and the second blade;

[0016] The first blade and the second blade are respectively fixedly connected to the limiting rod, and when viewed from the extension direction of the rotating part, the first blade, the clamping plate and the second blade are located on the tool holder in sequence.

[0017] More preferably, the tool holder further includes:

[0018] The top cover is fixedly connected to the blade holder and is located on the side of the second blade away from the clamping plate.

[0019] More preferably, a tooth guard is integrally formed on the side of the upper handle opposite to the lower handle;

[0020] Viewed along the extension direction of the rotating part, the first blade, the clamping plate, and the second blade are located sequentially between the top cover and the tooth guard plate.

[0021] More preferably, the tool holder further includes:

[0022] A plug is threaded to the tool holder and located at the end of the tool holder opposite to the top cover;

[0023] A reset spring, one end of which is fixedly connected to the plug;

[0024] When the tool holder is embedded in the upper handle, the other end of the return spring abuts against the upper handle.

[0025] More preferably, the upper handle body is also integrally formed with a fixing hole, and further includes a bearing fixedly connected to the fixing hole.

[0026] The cam is rotatably connected to the bearing.

[0027] More preferably, in the bump group, the length difference H between any two adjacent bumps extending radially along the rotating part is denoted as R, and satisfies the following relationship:

[0028] R = 0.2 mm,

[0029] Where mm is the unit of length, millimeter.

[0030] More preferably, the bump group includes a first bump, a second bump, a third bump, a fourth bump, and a fifth bump.

[0031] When viewed along the extension direction of the rotating part, the first protrusion, the second protrusion, the third protrusion, the fourth protrusion and the fifth protrusion are arranged side by side along the circumference of the rotating part.

[0032] More preferably, a first limiting groove and a second limiting groove are integrally formed inside the adjusting hole.

[0033] Rotating the cam circumferentially along the rotating part and observing along the axial direction of the rotating part, when the first protrusion abuts against the positioning groove, the fifth protrusion abuts against the first limiting groove;

[0034] When the fifth protrusion abuts against the positioning groove, the first protrusion abuts against the second limiting groove.

[0035] This utility model has the following beneficial effects:

[0036] By rotating the cam to switch the protrusion abutting the positioning groove, and driving the blade holder to move in a first direction perpendicular to the extension direction of the rotating part, the blade holder can be adjusted in height, effectively adjusting the gap distance between the blade holder and the guard plate. Furthermore, by employing a blade holder with a first blade and a second blade located on the side of the first blade opposite to the adjustment hole, the beard can be shaved sequentially by the first blade and the second blade during shaving, improving shaving efficiency. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a three-dimensional structural diagram of the razor described in one embodiment of this application;

[0039] Figure 2This is an exploded three-dimensional structural diagram of the handle of the razor described in one embodiment of this application;

[0040] Figure 3 This is an exploded three-dimensional structural diagram of the blade holder in a razor according to one embodiment of this application;

[0041] Figure 4 This is an exploded three-dimensional structural diagram of the cam in a shaver according to one embodiment of this application;

[0042] Figure 5 For the Figure 1 The cross-sectional view AA of the blade holder cut along the cutting line AA as described in the figure;

[0043] Figure 6 For the Figure 5 Enlarged view of point A in the middle;

[0044] Explanation of reference numerals: 100, razor; 10, handle; 11, upper handle body; 11A, tooth guard; 11B, fixing hole; 11C, bearing; 12, lower handle body; 20, cam; 21, rotating part; 22, protrusion group; 22A, first protrusion; 22B, second protrusion; 22C, third protrusion; 22D, fourth protrusion; 22E, fifth protrusion; 30, razor holder; 31, adjustment hole; 31A, positioning groove; 31B, first limiting groove; 31C, second limiting groove; 32, first blade; 33, second blade; 34, limiting rod; 35, clamp; 36, top cover; 37, plug; 38, return spring; F1, first direction. Detailed Implementation

[0045] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0046] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] Please refer to Figure 1 - Figure 6 One embodiment of this application provides a shaver 100 with an adjustable double-layer blade structure, the shaver 100 including: a handle 10, a cam 20 and a blade holder 30.

[0049] The cam 20 is rotatably connected to the tool holder 10. A cylindrical rotating part 21 is integrally formed on the cam 20, and a group of protrusions 22, composed of several protrusions, is integrally formed on the rotating part 21. When viewed along the extension direction parallel to the rotating part 21, any two protrusions in the group of protrusions 22 extend radially along the rotating part 21 at different lengths. The tool holder 30 is located in the tool holder 10. The tool holder 30 includes an adjusting hole 31 integrally formed with a positioning groove 31A, a first blade 32 fixedly connected to the tool holder 30, and a second blade 33 fixedly connected to the tool holder 30 and located on the side of the first blade 32 opposite to the adjusting hole 31. The rotating part 21 passes through the adjusting hole 31, and any protrusion abuts against the positioning groove 31A. Rotating the cam 20 switches the protrusion abutting against the positioning groove 31A, and drives the tool holder 30 to move along a first direction F1 perpendicular to the extension direction of the rotating part 21.

[0050] Through the mechanical structure design of the cam 20 and the protrusion assembly 22, the user only needs to rotate the cam 20 to switch the engagement of different protrusions with the positioning groove 31A, thereby pushing the razor holder 30 to move vertically and adjusting the shaving height of the first blade 32 and the second blade 33. Since the radial extension length of each protrusion in the protrusion assembly 22 is different, when the cam 20 rotates, protrusions of different heights sequentially abut against the positioning groove 31A, causing the razor holder 30 to undergo corresponding displacement changes, achieving multi-level height adjustment. This mechanical adjustment method has the advantages of simple structure and intuitive operation; the user can quickly adjust the shaving depth without disassembling the razor head. Simultaneously, the first blade 32 and the second blade 33 are arranged in layers. The first blade 32 can first shave longer beard hairs, while the second blade 33 further trims the remaining short stubble, making the shave more thorough. Compared to traditional fixed-height razors 100, this design better adapts to different beard lengths, facial contours, and individual shaving habits, reducing skin irritation and improving shaving efficiency and comfort. In addition, the cooperative structure of the cam 20 and the blade holder 30 ensures the stability and precision of the adjustment process, avoiding the impact on shaving performance due to loose or misaligned blades.

[0051] More preferably, the handle 10 includes an upper handle body 11 and a lower handle body 12 fixedly connected to and threadedly connected to the upper handle body 11. The tool holder 30 is embedded in the upper handle body 11 and extends into the lower handle body 12.

[0052] The upper handle 11 and lower handle 12 are connected by threads, ensuring the overall structural stability and facilitating the disassembly and maintenance of the razor holder 30. Secondly, the design of simultaneously embedding the razor holder 30 into both the upper handle 11 and lower handle 12 effectively enhances the stability of the razor holder 30 during shaving, preventing wobbling or displacement caused by uneven force. Furthermore, this segmented housing structure provides precise guiding space for the vertical movement of the razor holder 30, ensuring that the internal spaces of the razor holder 30 within the upper handle 11 and lower handle 12 move vertically during height adjustment, thus keeping the blades on the razor holder 30 moving linearly without deviation.

[0053] More preferably, the tool holder 30 further includes a limiting rod 34 and a clamping plate 35.

[0054] The limiting rod 34 is fixedly connected to the tool holder 30. The clamping piece 35 is fixedly connected to the limiting rod 34 and is located between the first blade 32 and the second blade 33. The first blade 32 and the second blade 33 are respectively fixedly connected to the limiting rod 34, and when viewed from the extension direction of the rotating part 21, the first blade 32, the clamping piece 35, and the second blade 33 are sequentially located on the tool holder 30.

[0055] The limiting rod 34 serves as the core support structure, providing a stable mounting reference for the first blade 32 and the second blade 33, ensuring that the two blades always maintain a precise relative position. The clamping plate 35 located between the two blades plays a crucial role in isolation and buffering, preventing resonance or collision between the two blades due to force during shaving, and maintaining the optimal blade spacing to achieve a layered shaving effect. This stacked layout of the first blade 32 + clamping plate 35 + second blade 33 forms a compact and orderly three-layer unit on the razor holder 30, optimizing the mechanical distribution during shaving and ensuring a compact layout design of the blade assembly, allowing the three-layer structure to be installed and used in a limited space.

[0056] More preferably, the tool holder 30 further includes a top cover 36. The top cover 36 is fixedly connected to the tool holder 30 and is located on the side of the second blade 33 opposite to the clamping plate 35.

[0057] The top cover 36 serves as a protective structure for the blade assembly and is also a contact structure near the beard during use. The top cover 36 effectively prevents the first blade 32 and the second blade 33 from being exposed except for the parts used for shaving, thus avoiding scratching the user's fingers or accidentally damaging the blades during use.

[0058] More preferably, a tooth guard plate 11A is integrally formed on the side of the upper handle 11 opposite to the lower handle 12. Viewed along the extension direction of the rotating part 21, the first blade 32, the clamping plate 35, and the second blade 33 are located sequentially between the top cover 36 and the tooth guard plate 11A.

[0059] The guard plate 11A, as an extension of the upper handle body 11, together with the top cover 36, forms a complete blade protection cavity, ensuring that the first blade 32, clip 35, and second blade 33 remain in a stable working position during shaving. This layout of guard plate 11A + blade assembly + top cover 36 prevents the blade assembly from shifting back and forth under shaving pressure and maintains a good blade shaving angle. Furthermore, the special curvature design of guard plate 11A optimizes the contact experience with the skin, pre-stretching the skin surface before the blades cut, making the beard stand upright for more thorough removal, while reducing the risk of cuts caused by skin folds.

[0060] More preferably, the tool holder 30 further includes a plug 37 and a return spring 38.

[0061] The plug 37 is threaded to the tool holder 30 and is located at the end of the tool holder 30 away from the top cover 36. One end of the return spring 38 is fixedly connected to the plug 37, and when the tool holder 30 is inserted into the upper handle 11, the other end of the return spring 38 abuts against the upper handle 11.

[0062] The threaded plug 37 provides a stable mounting base for the return spring 38, ensuring that the spring always applies a uniform elastic force along the axial direction of the lower handle 12. The return spring 38 creates a continuous preload between the threaded structure of the blade holder 30 and the upper handle 11, keeping the blade holder 30 firmly against the protrusion assembly 22 of the cam 20, eliminating adjustment gaps and enhancing the operating feel. Furthermore, the return spring 38 automatically compensates for gap changes caused by blade wear. When switching between protrusions of different heights, the pressure of the return spring 38 ensures that the blade holder 30 responds quickly and positions precisely, maintaining consistency in the cutting depth at each setting, significantly improving the service life and adjustment accuracy of the shaver 100.

[0063] More preferably, the upper handle 11 also integrally forms a fixing hole 11B, and further includes a bearing 11C fixedly connected to the fixing hole 11B. The cam 20 is rotatably connected to the bearing 11C.

[0064] By fixing the bearing 11C within the fixing hole 11B of the upper shank 11, high-precision rotational support is provided for the cam 20, ensuring smooth rotation and preventing cam 20 from shifting during rotation. The bearing 11C structure effectively reduces the frictional resistance during cam 20 rotation, making gear shifting easier and less strenuous. This bearing 11C fixing method transmits the force on the cam 20 to the fixing hole 11B and ultimately to the overall frame of the upper shank 11, avoiding local stress concentration. This extends the service life of the cam 20 mechanism and ensures the stability of the tool holder 30 movement during height adjustment. This design improves the operational feel of cam 20 gear shifting while also enhancing the durability of the cam 20. In addition, there is a scale on the fixing hole 11B, and each protrusion on the cam 20 corresponds to a gear number. When shifting gears, the current gear can be determined by the gear number indicated by the scale.

[0065] More preferably, in the bump group 22, the length difference H between any two adjacent bumps extending radially along the rotating part 21 is denoted as R, and satisfies the relationship: R = 0.2 mm, where mm is the unit of length.

[0066] By setting the height difference R between adjacent protrusions to a constant 0.2mm, the height of the razor holder 30 changes by 0.2mm with each speed setting change. Simultaneously, the gap between the first blade 32 and the contact element also exhibits a linearly progressive change, making the adjustment of the contact area between the razor 100 and the user's skin more ergonomic. A larger gap between the first blade 32 and the contact element means a larger contact area during shaving, resulting in more skin contact and a cleaner shave. The 0.2mm height difference clearly distinguishes the shaving experience of different speed settings, such as coarse and fine shaving, without causing skin discomfort due to excessive speed changes.

[0067] More preferably, the bump group 22 includes a first bump 22A, a second bump 22B, a third bump 22C, a fourth bump 22D, and a fifth bump 22E. When viewed along the extension direction of the rotating part 21, the first bump 22A, the second bump 22B, the third bump 22C, the fourth bump 22D, and the fifth bump 22E are arranged side by side along the circumference of the rotating part 21.

[0068] Five protrusions of different heights are evenly distributed around the circumference of the rotating part 21, allowing the cam 20 to accurately switch between five different shaving levels with each rotation. This circumferential arrangement fully utilizes the circumferential space of the cam 20, achieving multi-level height changes with equal increments of 0.2mm within a limited circumference. This satisfies the needs of different shaving depths while maintaining the compact structure of the cam 20. This layout, through the angular positioning between the protrusions and the limiting groove of the adjustment hole 31, effectively prevents accidental shifting of shaving levels, ensuring that the target level is clearly sensed and locked with each rotation.

[0069] More preferably, a first limiting groove 31B and a second limiting groove 31C are integrally formed within the adjusting hole 31. When the cam 20 is rotated circumferentially along the rotating part 21 and viewed axially along the rotating part 21, when the first protrusion 22A abuts against the positioning groove 31A, the fifth protrusion 22E abuts against the first limiting groove 31B. When the fifth protrusion 22E abuts against the positioning groove 31A, the first protrusion 22A abuts against the second limiting groove 31C.

[0070] The first limiting groove 31B and the second limiting groove 31C form a mechanical interlock with the protrusion assembly 22. When the first protrusion 22A engages with the positioning groove 31A, the tool holder 30 is at its lowest position, and the fifth protrusion 22E abuts against the first limiting groove 31B. When the fifth protrusion 22E engages with the positioning groove 31A, the tool holder 30 is at its highest position, and the first protrusion 22A abuts against the second limiting groove 31C, forming a symmetrical locking mechanism. This bidirectional limiting mechanism effectively prevents the cam 20 from disengaging due to excessive rotation.

[0071] By rotating the cam 20 to switch the protrusion to abut against the positioning groove 31A, and driving the blade holder 30 to move along a first direction F1 perpendicular to the extension direction of the rotating part 21, the blade holder 30 can be adjusted in height, effectively adjusting the gap distance between the blade holder 30 and the guard plate 11A. Furthermore, by employing a blade holder 30 with a first blade 32 and a second blade 33 located on the side of the first blade 32 facing away from the adjustment hole 31, the beard can be shaved sequentially by the first blade 32 and the second blade 33 during shaving, improving shaving efficiency.

[0072] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A razor with an adjustable double-layer blade structure, characterized in that, The razor includes: Handle A cam is rotatably connected to the tool holder. A cylindrical rotating part is integrally formed on the cam, and a group of protrusions, consisting of several protrusions, is integrally formed on the rotating part. When viewed along the extension direction parallel to the rotating part, any two protrusions in the group extend radially along the rotating part by different lengths. The tool holder is located in the tool handle. The tool holder includes an adjustment hole integrally formed with a positioning groove, a first blade fixedly connected to the tool holder, and a second blade fixedly connected to the tool holder and located on the side of the first blade opposite to the adjustment hole. The rotating part passes through the adjusting hole, and any protrusion abuts against the positioning groove. The cam is rotated to switch the protrusion abutting against the positioning groove, and the tool holder is driven to move in a first direction perpendicular to the extension direction of the rotating part.

2. A razor with an adjustable double-layer blade structure according to claim 1, characterized in that, The knife handle includes an upper handle body and a lower handle body that is fixedly connected to the upper handle body and threadedly connected to the upper handle body; The tool holder is embedded in the upper handle and extends into the lower handle.

3. A razor with an adjustable double-layer blade structure according to claim 2, characterized in that, The tool holder also includes: A limiting rod is fixedly connected to the tool holder; A clip is fixedly connected to the limiting rod and is located between the first blade and the second blade; The first blade and the second blade are respectively fixedly connected to the limiting rod, and when viewed from the extension direction of the rotating part, the first blade, the clamping plate and the second blade are located on the tool holder in sequence.

4. A razor with an adjustable double-layer blade structure according to claim 3, characterized in that, The tool holder also includes: The top cover is fixedly connected to the blade holder and is located on the side of the second blade away from the clamping plate.

5. A razor with an adjustable double-layer blade structure according to claim 4, characterized in that, A tooth guard plate is integrally formed on the side of the upper handle that is opposite to the lower handle; Viewed along the extension direction of the rotating part, the first blade, the clamping plate, and the second blade are located sequentially between the top cover and the tooth guard plate.

6. A razor with an adjustable double-layer blade structure according to claim 5, characterized in that, The tool holder also includes: A plug is threaded to the tool holder and located at the end of the tool holder opposite to the top cover; A reset spring, one end of which is fixedly connected to the plug; When the tool holder is embedded in the upper handle, the other end of the return spring abuts against the upper handle.

7. A razor with an adjustable double-layer blade structure according to claim 2, characterized in that, The upper handle body also integrally forms a fixing hole, and includes a bearing fixedly connected to the fixing hole. The cam is rotatably connected to the bearing.

8. A razor with an adjustable double-layer blade structure according to claim 1, characterized in that, In the bump group, the length difference H between any two adjacent bumps extending radially along the rotating part is denoted as R, and satisfies the following relationship: R = 0.2 mm, Where mm is the unit of length, millimeter.

9. A razor with an adjustable double-layer blade structure according to claim 1, characterized in that, The bump group includes a first bump, a second bump, a third bump, a fourth bump, and a fifth bump. When viewed along the extension direction of the rotating part, the first protrusion, the second protrusion, the third protrusion, the fourth protrusion and the fifth protrusion are arranged side by side along the circumference of the rotating part.

10. A razor with an adjustable double-layer blade structure according to claim 9, characterized in that, The adjustment hole also has a first limiting groove and a second limiting groove integrally formed inside it. Rotating the cam circumferentially along the rotating part and observing along the axial direction of the rotating part, when the first protrusion abuts against the positioning groove, the fifth protrusion abuts against the first limiting groove; When the fifth protrusion abuts against the positioning groove, the first protrusion abuts against the second limiting groove.

Images