Novel medical-grade electric skin preparation tool

Abstract

The invention relates to the technical field of medical instruments, in particular to a novel medical-grade electric skin preparation tool which is used for solving the problems that in preoperative skin preparation, a tool bit is prone to cross infection due to repeated use, and angle adjustment of the tool bit is limited. The tool comprises a handle main body, a rotating seat and a tool bit mounting seat, wherein the rotating seat and the tool bit mounting seat are rotationally connected to the handle main body; the tool bit mounting seat is provided with a skin preparation assembly for cutting hair. The angle of the tool bit can be adjusted in a multi-stage mode through the limiting protrusion and the groove structure to adapt to different human body curved surfaces. The disposable blade is replaced through the clamping structure and the quick release mechanism, and cross infection is avoided. The tool integrates the skin preparation function, the operation efficiency and the infection control level are improved, and the overall angle of the tool bit is in an R shape (namely the edge and the corner are in arc shapes in smooth transition), so that the risk of injury to the skin during shearing is reduced to the maximum extent.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a novel medical-grade electric skin preparation tool. Background Technology

[0002] In existing technologies, electric hair clippers are mainly divided into two categories: adult and infant models. Adult hair clippers often use a matrix arrangement of double-ring turbine blades, with a design philosophy emphasizing skin-friendly smoothness when trimming hair. Infant models, on the other hand, often employ a modified electric clipper structure, optimizing the blade head structure for a close and gentle clean against the skin. Some products also feature a negative pressure suction device to collect hair clippings. While these technologies have established relatively mature applications in everyday home use, their limitations are becoming increasingly apparent in pre-operative skin preparation scenarios within the medical field.

[0003] The inventor's research revealed the following technical shortcomings in existing hairdressing tools: 1. Infection control risks due to reusable shaving heads: Current hairdressing tools generally use reusable shaving heads, rather than disposable ones. Surgical patients undergoing shaving procedures differ from everyday home settings; there may be trauma or blood / fluid seepage, significantly increasing the risk of infection compared to routine use. While conventional hairdressing tools can be disinfected by soaking in disinfectant, in emergency situations such as surgeries, insufficient disinfection time can lead to incomplete sterilization, significantly increasing the risk of patient infection or cross-infection.

[0004] 2. Insufficient blade steering flexibility: Currently, commercially available blades generally use a fixed-angle design, which cannot be freely adjusted to adapt to the curves of the human body (such as complex surgical areas like the armpit, groin, and back of the head). During preoperative skin preparation, medical staff need to frequently adjust the tool's grip angle to adapt to the skin contours of different areas. The fixed blade structure easily leads to low operational efficiency and may cause skin abrasions due to repeated pushing and pulling, making it difficult to meet the requirements for "refined preoperative skin preparation" in "Strengthening Perioperative Infection Control and Ensuring Surgical Quality and Safety". Summary of the Invention

[0005] The purpose of this invention is to address the risks of cross-infection arising from the reuse of traditional surgical heads in existing technologies: Disinfection of shared surgical heads relies on manual operation, making it difficult to guarantee complete sterilization; residual blood clots or pathogens can easily lead to cross-infection between patients (such as blood-borne diseases like hepatitis B and HIV). Limited surgical head rotation affects operational efficiency: Commercially available products only support unidirectional or limited angle adjustment, unable to rotate freely 360°; when dealing with hair at complex angles (such as around surgical incisions or behind the ears), repeated tool adjustments are required, reducing clinical efficiency. Therefore, this invention proposes a novel medical-grade electric skin preparation tool.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A novel medical-grade electric skin preparation tool includes a handle body with a placement slot at the top; A rotating seat is rotatably disposed in the placement slot, and rotating slots are provided on both inner walls of the rotating seat; The cutter head mounting base is rotatably mounted in the rotating groove via a rotating shaft; The hair preparation assembly is located in the rectangular cavity opened at the top of the cutter head mounting base and is used to perform hair cutting operations; The inner walls on both sides of the rotating seat are provided with inclined grooves to allow space for the cutter head mounting seat.

[0007] In one possible design, the skin preparation assembly includes: The placement box is slidably disposed within the rectangular cavity; Compression spring II is connected between one end of the placement box and the inner wall of one side of the rectangular cavity; A rack is fixedly installed on one side of the placement box; A servo motor is fixedly installed in a rectangular groove opened on one side of the inner wall of the rectangular cavity; A half gear is fixedly mounted on the output shaft of the servo motor and meshes with the rack; Disposable blades are detachably snapped into the inside of the storage box; The servo motor drives the half gear to rotate, which in turn drives the rack and the placement box to reciprocate, thereby enabling the disposable blade to perform a cutting action.

[0008] In one possible design, the placement box has an opening on the side away from the rack, and the disposable blade has an L-shaped hole on one side of its bottom and a positioning groove on the other side. An L-shaped plate is slidably connected to the bottom inner wall of the placement box. A positioning block that engages with the positioning groove is fixedly installed on one side of the L-shaped plate. The L-shaped plate engages with the L-shaped hole. A compression spring Ⅲ is provided between one side of the L-shaped plate and the inner wall of one side of the placement box.

[0009] One possible design also includes replacing components, which includes: A circular groove is formed on one side of the cutter head mounting seat; A push rod slides through one side of the inner wall of the circular groove, with one end engaging with the opening; The pressing block is fixedly installed at one end of the push rod; Compression spring I is sleeved on the outside of the push rod and connected between one side of the pressing block and the inner wall of one side of the circular groove; Pressing the pressing block can push the L-shaped plate to move, causing the positioning block to disengage from the positioning groove, thereby releasing the fixation of the disposable blade.

[0010] In one possible design, the outer wall of the rotating seat is fixedly equipped with multiple limiting protrusions II, and the inner wall of the placement groove is provided with multiple limiting grooves II that engage with the limiting protrusions II. The inner wall of the rotating groove is provided with multiple limiting grooves I, and the outer wall of the rotating shaft is fixedly installed with multiple limiting protrusions I that engage with the limiting grooves I.

[0011] In one possible design, a blade guard is also included, which is detachably mounted on the top of the blade mounting base by means of ear plates and screws fixed around the perimeter, and the top of the blade guard has multiple notches.

[0012] In one possible design, the groove provides clearance for the cutter head mounting base during rotational adjustment, enabling it to adapt to the curved contours of different parts of the human body.

[0013] In this application, by rotating the inclined groove, the inclined groove drives multiple external limiting protrusions II to rotate. The multiple limiting protrusions II continuously engage with multiple limiting grooves II to adjust the angle of the cutter head mounting seat. By rotating the cutter head mounting seat, the cutter head mounting seat drives the rotating shaft to rotate inside the rotating groove. The limiting protrusions I continuously engage with multiple limiting grooves I, thereby adjusting the tilt angle of the cutter head mounting seat. The inclined groove can conveniently leave space for the tilted cutter head mounting seat. The servo motor is activated, and its output shaft drives the half-gear to rotate. The half-gear drives the rack to move laterally, which in turn drives the placement box to move laterally within the rectangular cavity. The placement box then drives the disposable blade to move laterally, compressing spring II. When the half-gear disengages from the rack, the placement box drives the disposable blade to reset, and the blade continues to reciprocate, cutting hair. The disposable blade features a 28-tooth design with a golden ratio, and each tooth tip has a bead-like coating structure (i.e., small bead-shaped polymer material is covered or welded to the top of the metal tooth tip). The overall angle of the blade head follows an R-shape (i.e., the edges and corners are smoothly rounded arcs) to minimize the risk of skin damage during cutting.

[0014] After use, press the pressing block. The pressing block will drive the push rod to move laterally and squeeze the compression spring I. One end of the push rod is exactly matched with the opening on one side of the box. After the push rod enters the opening, it will enter the L-shaped hole and push the lower side of the L-shaped plate. The L-shaped plate will squeeze the compression spring III and drive the positioning block to move laterally. The positioning block will move out of the positioning groove, which can release the braking state of the disposable blade, making it easy to take out the disposable blade for replacement.

[0015] Beneficial effects: By rotating the inclined groove to engage the limiting protrusion II with the limiting groove II, and by rotating the cutter head mounting base to engage the limiting protrusion I with the limiting groove I, the angle of the cutter head mounting base can be flexibly adjusted. This allows for easy adjustment of the cutter head angle according to different skin preparation areas and needs, thereby improving the accuracy and comfort of skin preparation.

[0016] The servo motor drives the half-gear to rotate, which in turn causes the rack to move the placement box and disposable blade in a lateral reciprocating motion, achieving effective hair cutting. The disposable blade adopts a golden ratio 28-tooth design, and each tooth tip is wrapped with a bead-like structure. The overall angle of the blade head follows an R shape, minimizing the risk of skin damage during cutting and improving the safety and quality of skin preparation.

[0017] After use, press the pressing block to move the push rod. The push rod enters the opening of the placement box and pushes the L-shaped plate, causing the positioning block to move out of the positioning slot, releasing the braking state of the disposable blade, making it easy to quickly take out the disposable blade for replacement, thus improving the convenience and efficiency of tool use. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a novel medical-grade electric skin preparation tool proposed in this invention. Figure 2 This is an exploded view of a novel medical-grade electric skin preparation tool proposed in this invention. Figure 3 This is a three-dimensional cross-sectional view of the handle body and rotating seat in a novel medical-grade electric skin preparation tool proposed in this invention. Figure 4 This is an exploded view of the blade mounting base and blade cover in a novel medical-grade electric skin preparation tool proposed in this invention. Figure 5 This is a three-dimensional cross-sectional view of the blade mounting base in a novel medical-grade electric skin preparation tool proposed in this invention. Figure 6 This is a three-dimensional structural diagram of the placement box in a novel medical-grade electric skin preparation tool proposed in this invention; Figure 7This is an exploded view of the disposable blade and L-shaped plate in a novel medical-grade electric skin preparation tool proposed in this invention.

[0019] In the diagram: 1. Handle body; 2. Rotary seat; 3. Blade head mounting seat; 5. Blade head cover; 10. Inclined groove; 11. Limiting groove I; 12. Rotating groove; 13. Placement groove; 14. Limiting groove II; 15. Limiting protrusion II; 16. Pressing block; 17. Limiting protrusion I; 18. Rotating shaft; 19. Rectangular cavity; 20. Ear plate; 21. Positioning groove; 22. Notch; 23. Disposable blade; 24. Circular groove; 25. Compression spring I; 26. Push rod; 27. Rectangular groove; 28. Placement box; 29. ​​Rack; 30. Servo motor; 31. Half gear; 32. Compression spring II; 33. Compression spring III; 34. L-shaped plate; 35. Positioning block; 36. L-shaped hole. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In one embodiment: Refer to Figure 1-7 This skin preparation tool mainly consists of a handle body 1, a rotating base 2, a blade mounting base 3, and related components. The handle body 1 has a placement groove 13 at its top, and the rotating base 2 is rotatably connected within the placement groove 13. Rotation grooves 12 are formed on the inner walls of both sides of the rotating base 2, and rotating shafts 18 are rotatably connected within the rotation grooves 12. The blade mounting base 3 is fixedly mounted at one end of the two rotating shafts 18 that are close to each other. Inclined grooves 10 are formed on the inner walls of both sides of the rotating base 2 to allow space for the blade mounting base 3. A rectangular cavity 19 is formed at the top of the blade mounting base 3, and a skin preparation component is housed within the rectangular cavity 19. A replacement component is located on one side of the blade mounting base 3, and a receiving cavity 6 is formed on one side of the handle body 1.

[0022] When the hair removal assembly is in operation, the placement box 28 is slidably connected to the inner wall of the rectangular cavity 19, and the compression spring II 32 connects one end of the placement box 28 to one side of the inner wall of the rectangular cavity 19. A rack 29 is fixedly installed on one side of the placement box 28, and a rectangular groove 27 is formed on one side of the inner wall of the rectangular cavity 19 and communicates with the cavity. A servo motor 30 is fixedly installed inside the rectangular groove 27, and a half-gear 31 is fixedly installed on the output shaft of the servo motor 30 and meshes with the rack 29. The disposable blade 23 is engaged inside the placement box 28. When the servo motor 30 is started, its output shaft drives the half-gear 31 to rotate. The half-gear 31 drives the rack 29 to move laterally, which in turn drives the placement box 28 to move laterally within the rectangular cavity 19. The placement box 28 then drives the disposable blade 23 to move laterally and compress the compression spring II 32. When the half-gear 31 disengages from the rack 29, the placement box 28, under the action of the compression spring II 32, drives the disposable blade 23 to reset. This reciprocating motion achieves the cutting of hair. The disposable blade 23 features a 28-tooth design with a golden ratio, and each tooth tip has a bead-like wrapping structure. The overall angle of the blade head follows an R shape to reduce the risk of skin damage during cutting.

[0023] The replacement component is used to replace the disposable blade 23. A circular groove 24 is formed on one side of the blade mounting base 3. A push rod 26 slides through the inner wall of one side of the circular groove 24. One end of the push rod 26 engages with an opening on one side of the placement box 28. A pressing block 16 is fixedly installed on one end of the push rod 26. A compression spring I 25 connects one side of the pressing block 16 to the inner wall of one side of the circular groove 24 and is sleeved on the outside of the push rod 26. An opening is formed on the side of the placement box 28 away from the rack 29. An L-shaped hole 36 is formed on one side of the bottom of the disposable blade 23, and a positioning groove 21 is formed on the other side. An L-shaped plate 34 is slidably connected to the inner wall of the bottom of the placement box 28. A positioning block 35 is fixedly installed on one side of the L-shaped plate 34. The L-shaped plate 34 engages with the L-shaped hole 36, and the positioning block 35 engages with the positioning groove 21. A compression spring III 33 is positioned between one side of the L-shaped plate 34 and the inner wall of one side of the placement box 28. After use, press the pressing block 16 to drive the push rod 26 to move laterally and squeeze the compression spring I 25. After the push rod 26 enters the opening, it enters the L-shaped hole 36 and pushes the lower side of the L-shaped plate 34. The L-shaped plate 34 squeezes the compression spring III 33 and drives the positioning block 35 to move laterally. The positioning block 35 moves out of the positioning groove 21, releasing the braking state of the disposable blade 23, making it easy to take out and replace.

[0024] The angle of the blade mounting base 3 is adjusted by rotating the inclined groove 10. The inclined groove 10 drives multiple limiting protrusions II 15 on the outside to rotate. The multiple limiting protrusions II 15 continuously engage with multiple limiting grooves II 14 opened on the inner wall of the placement groove 13, achieving the initial adjustment of the angle of the blade mounting base 3. Rotating the blade mounting base 3 drives the rotating shaft 18 to rotate within the rotating groove 12. The multiple limiting protrusions I 17 on the outer wall of the rotating shaft 18 continuously engage with the multiple limiting grooves I 11 opened on the inner wall of the rotating groove 12, thereby adjusting the tilt angle of the blade mounting base 3. The inclined groove 10 provides space for the tilted blade mounting base 3, allowing the blade to freely rotate and adjust according to the curves of the human body (such as complex surgical areas such as the armpit, groin, and back of the head), meeting the requirements of refined preoperative skin preparation, improving operational efficiency, and reducing the risk of skin abrasion.

[0025] This application can be used in the field of medical devices, or in other fields applicable to this application.

[0026] In another embodiment: Reference Figure 1-7 A novel medical-grade electric skin preparation tool is used in the field of medical devices. The blade guard 5 is installed on the top of the blade mounting base 3, and the ear plates 20 are fixedly installed around the blade guard 5. The ear plates 20 are detachably installed on the top of the blade mounting base 3 by screws. The blade guard 5 has multiple notches 22 on the top, which can protect the blade and facilitate operation.

[0027] However, as is well known to those skilled in the art, the working principle and wiring method of the servo motor 30 are conventional methods or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A novel medical-grade electric skin preparation tool, characterized in that, include: The handle body (1) has a placement slot (13) on its top. The rotating seat (2) is rotatably disposed in the placement groove (13), and the inner walls on both sides of the rotating seat (2) are provided with rotating grooves (12). The cutter head mounting base (3) is rotatably mounted in the rotating groove (12) via a rotating shaft (18); The hair preparation assembly is located in the rectangular cavity (19) opened at the top of the blade mounting base (3) and is used to perform hair cutting operations; The inner walls on both sides of the rotating seat (2) are provided with inclined grooves (10) to make way for the cutter head mounting seat (3).

2. The novel medical-grade electric skin preparation tool according to claim 1, characterized in that, The skin preparation assembly includes: The placement box (28) is slidably disposed within the rectangular cavity (19); Compression spring II (32) is connected between one end of the placement box (28) and the inner wall of one side of the rectangular cavity (19); A rack (29) is fixedly installed on one side of the placement box (28); A servo motor (30) is fixedly installed in a rectangular groove (27) opened on one side of the inner wall of the rectangular cavity (19); The half gear (31) is fixedly mounted on the output shaft of the servo motor (30) and meshes with the rack (29); Disposable blade (23) is detachably snapped into the inside of the placement box (28).

3. A novel medical-grade electric skin preparation tool according to claim 2, characterized in that, The placement box (28) has an opening on the side away from the rack (29), and the disposable blade (23) has an L-shaped hole (36) on one side of its bottom and a positioning groove (21) on the other side. The bottom inner wall of the placement box (28) is slidably connected to an L-shaped plate (34), and a positioning block (35) that engages with the positioning groove (21) is fixedly installed on one side of the L-shaped plate (34). The L-shaped plate (34) engages with the L-shaped hole (36). A compression spring Ⅲ (33) is provided between one side of the L-shaped plate (34) and one side of the inner wall of the placement box (28).

4. A novel medical-grade electric skin preparation tool according to claim 3, characterized in that, This also includes replacing components, including: A circular groove (24) is formed on one side of the cutter head mounting seat (3); The push rod (26) slides through one side of the inner wall of the circular groove (24), and one end of it engages with the opening; The pressing block (16) is fixedly installed at one end of the push rod (26); Compression spring I (25) is sleeved on the outside of the push rod (26) and connected between one side of the pressing block (16) and the inner wall of one side of the circular groove (24); Pressing the pressing block (16) can push the L-shaped plate (34) to move, causing the positioning block (35) to disengage from the positioning groove (21) and release the fixation of the disposable blade (23).

5. A novel medical-grade electric skin preparation tool according to claim 1, characterized in that, The outer wall of the rotating seat (2) is fixedly installed with multiple limiting protrusions II (15), and the inner wall of the placement groove (13) is provided with multiple limiting grooves II (14) that engage with the limiting protrusions II (15). The inner wall of the rotating groove (12) is provided with multiple limiting grooves I (11), and the outer wall of the rotating shaft (18) is fixedly installed with multiple limiting protrusions I (17) that engage with the limiting grooves I (11).

6. A novel medical-grade electric skin preparation tool according to claim 5, characterized in that, It also includes a blade guard (5), which is detachably mounted on the top of the blade mounting base (3) by means of ear plates (20) fixed around the perimeter and screws. The top of the blade guard (5) has multiple notches (22).

7. A novel medical-grade electric skin preparation tool according to claim 1, characterized in that, The inclined groove (10) provides clearance for the blade mounting base (3) during rotation adjustment, enabling it to adapt to the curved contours of different parts of the human body.

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