Skin preparation knife

Abstract

The skin preparation knife comprises a handle and a knife body, the handle is provided with a groove-shaped pivot seat, the knife body can be inserted into a pivot seat groove and hinged to the pivot seat groove, and the hinge point is located in the middle of the knife body. And one end of the cutter is provided with a short blade and the other end is provided with a long blade. According to the utility model, the short blade and the long blade are arranged on the cutter, the long blade is used for removing hair at wider positions such as abdomen, thighs and the like, and the short blade is used for removing hair at narrower positions of perineum or armpits, so that the shaving requirements in wider and narrower spaces can be met at the same time, and the applicability is strong.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a skin preparation knife. Background Art

[0002] A dermaplaning scalpel is a commonly used surgical tool used to shave hair from the surgical site to facilitate surgery. The goal of dermaplaning is to reduce the bacterial count on the skin without damaging the integrity of the skin, thereby lowering the risk of postoperative wound infection. Hair removal is required in areas such as the armpits, abdomen, thighs, and perineum.

[0003] Currently, medical personnel often use skin preparation knives that consist of a handle, a base, and a blade. The handle is connected to the base, and the blade is located on the base, similar to a common razor. For example, the skin preparation knives disclosed in patent CN218557160U, which is currently on the market, integrate a blade head, a handle, a housing, and a pushing mechanism. The blade head consists of a blade holder and a blade mounted on the blade holder. This design ensures stability and precision during the skin preparation process.

[0004] However, it still inherits an inherent limitation of traditional skin preparation knives or ordinary razors - that is, it is only equipped with blades of a single length. On the one hand, when the blade is too long, the difficulty of operation increases significantly when dealing with narrow and sensitive parts of the human body such as the perineum. Not only is it difficult for a blade that is too long to move flexibly in these small spaces, it also greatly increases the risk of accidental skin scratches, causing unnecessary pain and safety hazards to patients. On the other hand, if the blade is designed to be too short, although it improves the safety of the operation to a certain extent, it sacrifices the efficiency of skin preparation. Especially in emergency surgery scenarios, a shorter blade means that medical staff need to spend more time to complete the skin preparation work, which is undoubtedly a waste of precious time and may also indirectly affect the smooth progress of the operation and overall work efficiency. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a skin preparation knife, which is used for shaving and preparing the skin before surgery and can meet the shaving requirements in relatively open and relatively narrow spaces at the same time.

[0006] In order to solve the above technical problems, the utility model provides a skin preparation knife, including a handle and a knife. The handle has a groove-shaped pivot seat, and the knife can be inserted into the pivot seat groove and hinged to it, and the hinge point is located in the middle of the knife; a short blade is provided at one end of the knife and a long blade is provided at the other end.

[0007] In at least one embodiment, the cutter is in the shape of an isosceles trapezoid and has a long side and a short side, with the short blade positioned on the short side and the long blade positioned on the long side. The cutter is in the shape of an isosceles trapezoid, with the long side of the trapezoid base corresponding to the length of the long blade and the short side corresponding to the length of the short blade. This allows the cutter to reach easily in narrow areas without interfering with the short blade's ability to remove hair in narrow areas such as the perineum or underarms.

[0008] In at least one embodiment, the tool has protruding shafts on both sides, and mounting holes are provided on the inner walls of the pivot seat on both sides of the slot. The shaft is rotatably mounted within the mounting holes. The handle has a cavity, the mounting holes communicating with the cavity; a fixing member for securing the shaft is located within the cavity. The fixing member includes a rack, a gear, and a nut. The gear is mounted on and fixedly connected to the shaft, and the rack meshes with the gear. The rack is slidably mounted on the handle, with both ends of the rack extending outside the handle and provided with screws. The nut is mounted on one of the screws and threadedly connected thereto.

[0009] In at least one embodiment, the handle is provided with an annular groove, the nut is provided with a slip ring, the slip ring is arranged around the rack, and the slip ring is slidably embedded in the annular groove.

[0010] The utility model achieves at least the following beneficial effects:

[0011] The utility model provides a short blade and a long blade on the cutter. The long blade is used to remove hair in wider areas such as the abdomen and thighs, and the short blade is used to remove hair in narrower areas such as the perineum or armpits. The utility model can meet the shaving requirements in both wider and narrower spaces and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] One or more embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0013] Figure 1 This is a perspective view of one embodiment of the present invention.

[0014] Figure 2 for Figure 1 Cross-sectional view of an embodiment.

[0015] The numbers in the figure are: 1, handle; 2, tool; 3, short blade; 4, long blade; 5, fixing part; 11, pivot seat; 12, cavity; 21, rotating shaft; 51, rack; 52, gear; 53, nut; 54, screw. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present invention can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided herein to make the disclosure of the present invention more complete and to fully convey the concepts of the present invention to those skilled in the art.

[0017] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention.

[0018] The inventors have designed a skin preparation knife in the prior art that may not be able to remove hair in narrow areas. After careful analysis, they found that the main reason for the above technical problems is that the skin preparation knife in the prior art still uses an inherent limitation of traditional skin preparation knives or ordinary razors - that is, it is only equipped with a blade of a single length. On the one hand, when the blade is too long, the difficulty of operation increases significantly when dealing with narrow and sensitive parts of the human body such as the perineum. Not only is it difficult for a blade that is too long to move flexibly in these narrow spaces, it also greatly increases the risk of accidentally scratching the skin, causing unnecessary pain and safety hazards to patients. Based on the above analysis, the inventors designed a skin preparation knife for shaving and preparing the skin before surgery, which can meet the shaving requirements in both wide and narrow spaces.

[0019] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, a skin preparation knife includes a handle 1 and a blade 2. The handle 1 has a slotted pivot seat 11. The blade 2 can be inserted into the slot of the pivot seat 11 and hinged thereto, with the hinge point located in the middle of the blade 2. The blade 2 is provided with a short blade 3 at one end and a long blade 4 at the other end. The blade 2 is an isosceles trapezoid with a long side and a short side. The short blade 3 is located on the short side of the blade 2, and the long blade 4 is located on the long side of the blade 2.

[0020] A rotating shaft 21 protrudes from both sides of the tool 2. Mounting holes are provided on the inner walls of the groove on both sides of the pivot seat 11, and the rotating shaft 21 is rotatably mounted within the mounting holes. The handle 1 has a cavity 12, and the mounting holes are connected to the cavity 12. A fixing member 5 for fastening the rotating shaft 21 is provided within the cavity 12. The fixing member 5 includes a rack 51, a gear 52, and a nut 53. The gear 52 is mounted on the rotating shaft 21 and is fixedly connected thereto, and the rack 51 meshes with the gear 52. The rack 51 is slidably mounted on the handle 1. Both ends of the rack 51 extend outside the handle 1 and are provided with screws 54. The nut 53 is mounted on one of the screws 54 and is threadedly connected thereto. The handle 1 has an annular groove, and the nut 53 has a slip ring that surrounds the rack 51 and is slidably embedded in the annular groove. A rotating rod protrudes from both sides of the nut 53, and the rotating rod is used to help the user rotate the nut 53. When the nut 53 is rotated clockwise, the screw 54 cannot rotate along with the nut 53 due to the meshing of the rack 51 and the gear 52. The screw 54 moves along its length, thereby driving the gear 52 to rotate clockwise, and the short blade 3 of the cutter 2 stands on top, which is convenient for the user to use the short blade 3. At this time, the short blade 3 is located outside the pivot seat 11, and the long blade 4 is received in the slot of the pivot seat 11, preventing the long blade 4 from accidentally scratching the patient's or user's skin. When the nut 53 is rotated counterclockwise, the screw 54 moves along its length, thereby driving the gear 52 to rotate counterclockwise, and the long blade 4 of the cutter 2 stands on top, which is convenient for the user to use the long blade 4. At this time, the long blade 4 is located outside the pivot seat 11, and the short blade 3 is received in the slot of the pivot seat 11, preventing the long blade 4 from accidentally scratching the patient's or user's skin. The nut 53 is embedded in the annular groove of the handle 1. A stopper protrudes from the inner wall of the annular groove. The stopper can block the slip ring in the annular groove to prevent the nut 53 from escaping from the annular groove, thereby limiting the movement of the nut 53. Even if the operator accidentally touches the screw 54, the screw 54 cannot be pushed because the nut 53 is threadedly connected to the screw 54.

[0021] All of the above embodiments are illustrative rather than restrictive. Various modifications or variations made by those skilled in the art to the above-described specific embodiments under the concept of the present invention should fall within the scope of protection of the present invention.

Claims

1. Skin preparation knife, characterized by: The invention comprises a handle (1) and a knife (2), wherein the handle (1) has a slot-shaped pivot seat (11), and the knife (2) can be inserted into the slot of the pivot seat (11) and hinged thereto, with the hinge point located in the middle of the knife (2); a short blade (3) is provided at one end of the knife (2), and a long blade (4) is provided at the other end.

2. The skin preparation knife according to claim 1, characterized in that: The tool (2) is in the shape of an isosceles trapezoid and has a long side and a short side. The short blade (3) is arranged on the short side of the tool (2), and the long blade (4) is arranged on the long side of the tool (2).

3. The skin preparation knife according to claim 1 or 2, characterized in that: Rotating shafts (21) are protruded from both sides of the cutter (2), and mounting holes are provided on the inner walls of both sides of the groove of the pivot seat (11), and the rotating shafts (21) are rotatably arranged in the mounting holes.

4. The skin preparation knife according to claim 3, characterized in that: The handle (1) has a cavity (12), and the mounting hole is communicated with the cavity (12); a fixing member (5) for fastening the rotating shaft (21) is provided in the cavity (12).

5. The skin preparation knife according to claim 4, characterized in that: The fixing member (5) comprises a rack (51), a gear (52) and a nut (53); the gear (52) is sleeved on the rotating shaft (21) and fixedly connected thereto; the rack (51) and the gear (52) are meshed; the rack (51) is slidably arranged on the handle (1); both ends of the rack (51) can extend out of the handle (1) and are provided with screw rods (54); the nut (53) is sleeved on one of the screw rods (54) and is threadedly connected thereto.

6. The skin preparation knife according to claim 5, characterized in that: The handle (1) is provided with an annular groove, and the nut (53) is provided with a slip ring, which is arranged around the rack (51) and can be slidably embedded in the annular groove.

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