Cartilage cortex cutting knife
By designing a cartilage cortex cutting knife, the problems of unstable cutting of rib cartilage cortex and hand protection were solved, achieving stable cutting and hand safety.
Patent Information
- Application Number
- CN202423028924.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-09
AI Technical Summary
In existing technologies, it is difficult to apply stable force during rib cartilage cortex cutting and there is a lack of protective structures, which can easily injure the operator's hands.
Design a cartilage cortex cutting knife, including a detachable blade head and a protective frame. The blade head is connected to the handle via a snap-fit block and a fixing bolt. The protective frame is rotatably connected via a hinge shaft. The handle is designed as an arc shape with protrusions on both sides and a concave center, which facilitates stable cutting and protects the operator.
It achieves stable operation and hand protection when cutting cartilage cortex, avoiding operator injury, and facilitates the disassembly and replacement of the blade and depth adaptation.
Smart Images
Figure CN223759852U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical device technology, specifically relating to a cartilage cortex harvesting knife. Background Technology
[0002] In autologous cartilage rhinoplasty, the use of rib cartilage is gradually increasing. Its strong support and abundant material are its outstanding advantages in rhinoplasty. There are many surgical methods for rib cartilage rhinoplasty, and using rib cartilage cortical grafts to reconstruct or strengthen the lower lateral cartilage support to mimic physiological structures has become a major trend in rhinoplasty in recent years.
[0003] Currently, a clinical scalpel is typically used to harvest costal cartilage cortex. However, due to the inherent hardness of costal cartilage cortex, the scalpel's structure makes it difficult to apply force to cut it. Furthermore, the scalpel is completely exposed during the cutting process and lacks protective features, making it easy to cut the operator's hand and cause injury. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model designs a cartilage cortex cutting knife, which makes it easier for operators to apply force to cut the cartilage cortex while protecting the operators and preventing them from cutting their hands.
[0005] To achieve the above-mentioned technical objectives, this utility model is implemented through the following technical solution: a cartilage cortex harvesting knife, including a blade head;
[0006] The cutter head is detachably mounted on the handle head end, and a protective frame is provided on the handle head end to cover the cutter head;
[0007] The handle is designed as an arc shape with protrusions on both sides and a concave middle, and the head end of the handle is an inclined plane tangent to the arc line at the front end of the handle.
[0008] Preferably, the cutter head is connected to the inclined plane at the head end of the handle by a snap-fit block and a fixing bolt. The snap-fit block restricts the rotation of the cutter head, and the fixing bolt restricts the movement of the cutter head to prevent the cutter head from coming off the handle.
[0009] Preferably, the protective frame is U-shaped, with the upper opening rotatably connected to both sides of the inclined plane at the end of the handle via a hinge shaft.
[0010] Preferably, a torsion spring is provided on the hinge shaft to allow the protective frame to rotate and reset.
[0011] Preferably, the lower part of the recessed arc in the middle of the handle is also provided with a holding ring, which is integrally connected to the back of the inclined plane at the head end of the handle and the bottom surface of the end of the handle through arc-shaped connecting strips on both sides.
[0012] The beneficial effects of this utility model are:
[0013] When cutting cartilage cortex, the curved design with protrusions on both sides and a concave center on the handle makes it more stable for the operator to hold. The blade is detachably mounted on an inclined plane tangent to the curved line at the front of the handle, which makes it easier for the operator to apply force to cut the cartilage cortex and facilitates the removal and replacement of the blade. At the same time, a protective frame is provided at the end of the handle to shield the blade, which can fully cover the blade when cutting cartilage cortex and prevent the blade from accidentally injuring the operator. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments are briefly introduced below.
[0015] Figure 1 This is a schematic diagram of the overall structure of the cutting blade in Example 1;
[0016] Figure 2 This is a front view schematic diagram of the cutting blade in Example 1;
[0017] Figure 3 This is a schematic diagram of the internal structure connecting the protective frame and the handle in Embodiment 2;
[0018] In the attached diagram, the structural names represented by each number are as follows:
[0019] 1-Cutter head, 2-Handle, 201-Snap-fit block, 202-Fixing bolt, 203-Holding ring, 204-Connecting bar, 3-Protective frame, 301-Hinge shaft, 302-Torsion spring. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0021] Example 1
[0022] To address the current practice of harvesting costal cartilage cortex using a scalpel, which is often inefficient due to the cortical hardness of the cartilage and the limitations imposed by the scalpel's structure, and the risk of injury to the operator's hand due to the exposed scalpel lacking protective features, please refer to [reference needed]. Figures 1 to 2 As shown, a cartilage cortex harvesting knife is proposed, including the blade 1 of a conventional scalpel;
[0023] The cutter head 1 is installed at the end of the handle 2, and a protective frame 3 is provided at the end of the handle 2 to cover the cutter head 1;
[0024] The handle 2 is designed as an arc shape with protrusions on both sides and a concave middle. The head end of the handle 2 is an inclined plane that is tangent to the arc line at the front end of the handle 2.
[0025] The cutter head 1 is connected to the inclined plane at the end of the handle 2 via the locking block 201 and the fixing bolt 202. The locking block 201 restricts the rotation of the cutter head 1 in the vertical plane, and the fixing bolt 202 restricts the movement of the cutter head 1 in the horizontal plane, preventing the cutter head 1 from coming off the handle 2, thereby ensuring that the cutter head 1 is installed stably.
[0026] The protective frame 3 is U-shaped, with its upper opening rotatably connected to both sides of the inclined plane at the end of the handle 2 via a hinge shaft 301. The rotatably connected protective frame 3 can adapt well to the cutting depth of the cutter head 1. When the cutting depth changes, the protective frame 3 rotates to ensure that the protective frame 3 covers the cutter head 1 under any circumstances.
[0027] The handle 2 is also provided with a holding ring 203 in the concave arc-shaped lower part. The holding ring 203 is integrally connected to the back of the inclined plane at the head end of the handle 2 and the bottom surface of the end of the handle 2 through the arc-shaped connecting strips 204 on both sides. The handle 2 is hollow on the whole side, and the handle 2 is lightweight, making it easier for the operator to hold.
[0028] When cutting the cartilage cortex, the operator holds handle 2 and holding ring 203, aligns the blade 1 with the costal cartilage cortex, and presses down firmly on handle 2 to make the blade cut into the cartilage cortex. At this time, the U-shaped seal at the bottom of the protective frame 3 contacts the patient's cartilage cortex, blocking the blade 1 and preventing injury to the operator's hand. When it is necessary to adjust the cutting position, the operator can hold handle 2 and holding ring 203 to move the blade 1 to the desired position and then continue cutting.
[0029] Example 2
[0030] See Figure 3 As shown, based on embodiment 1, a torsion spring 302 is provided on the hinge shaft 301 to rotate and reset the protective frame 3, which can further adapt to the change in the cutting depth of the cutter head 1. When the cutting position changes from a deeper cutting position to a shallower cutting position, the torsion spring 302 causes the protective frame 3 to reset accordingly.
[0031] To provide greater stability for the operator when holding the handle, the surface of the handle 2 is also provided with anti-slip texture to increase grip stability. Additionally, the inside of the grip ring 203 can be lined with soft material to enhance grip comfort.
[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not describe all details exhaustively, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification.
Claims
1. A cartilage cortical cutting knife, comprising a knife head (1), characterized in that: the knife head (1) is detachably mounted at the head end of a handle (2), and a protective frame (3) is arranged at the head end of the handle (2) to shield the knife head (1); the handle (2) is arranged in an arc shape with convex sides and a concave middle, and the head end of the handle (2) is an inclined plane tangent to the arc line of the front end of the handle (2).
2. The chondro-cortectomy tool of claim 1, wherein, the knife head (1) is connected to the inclined plane at the head end of the handle (2) through a clamping block (201) and a fixing bolt (202), the clamping block (201) limits the rotation of the knife head (1), and the fixing bolt (202) limits the movement of the knife head (1) to prevent the knife head (1) from coming out of the handle (2).
3. The chondro-cortectomy tool of claim 1, wherein, the protective frame (3) is arranged in a U shape, and the upper opening is rotatably connected to the two sides of the inclined plane at the head end of the handle (2) through a hinge shaft (301).
4. The osterocortical resector of claim 3, wherein: a torsional spring (302) is arranged on the hinge shaft (301) to reset the rotation of the protective frame (3).
5. The chondro-cortectomy tool of claim 1, wherein, the lower part of the concave arc in the middle of the handle (2) is further provided with a holding ring (203), and the holding ring (203) is integrally connected to the back of the inclined plane at the head end of the handle (2) and the bottom surface of the tail end of the handle (2) through two arc-shaped connecting strips (204) on the two sides.