Depth-limited microfracture opener

Abstract

The utility model discloses a kind of microfracture mouth openers of depth limiting. Microfracture mouth opener includes handle portion and the punching portion fixed in the handle portion, the handle portion and the punching portion are vertically arranged;Wherein, the punching portion includes the main body section, the hole expanding section and the tip section sequentially arranged, the main body section and the hole expanding section form a limiting mechanism, the tip section and the limiting mechanism form preset punching depth, the cross section of the tip section gradually decreases from the hole expanding section to the end direction. Limiting mechanism can limit the punching depth of hole expanding section, so as to avoid microfracture mouth opener punching too deep. Tip section is as the part of breaking open bone layer, and constitutes tip puncture. Hole expanding section gradually expands, and provides support to tip section, which can avoid damage expansion, and also avoid bone to produce bone debris.

Description

Technical Field

[0001] This utility model relates to the field of surgical instrument technology, and in particular to a depth-limited microfracture opening device. Background Technology

[0002] In orthopedic surgery, holes need to be drilled in the bone to fix therapeutic instruments or tissues. This also allows bone marrow, which has repair properties, to seep out, enabling nutrients, including stem cells, to enter the damaged cartilage area and promote repair. For example, microfracture surgery can be performed for articular cartilage damage.

[0003] However, bone marrow is an important substance within bones, located at a specific depth, and cannot be subjected to impact or damage. In existing technology, drilling tools are used to create fixed holes in the bone. During drilling, bone fragments are inevitably generated, which can easily cause infection and lead to wound enlargement. In some impact drilling instruments, the tapered end of the instrument presents a technical problem of uncontrollable drilling depth, thus requiring improvement. Utility Model Content

[0004] To overcome the problems existing in related technologies, this utility model provides a depth-limited microfracture opening device to solve the technical problems of wound enlargement during drilling and uncontrollable impact drilling depth.

[0005] According to a first aspect of the present invention, a depth-limiting microfracture mouth opener is provided. The microfracture mouth opener includes a handle portion and a perforated portion fixed to the handle portion, wherein the handle portion and the perforated portion are arranged perpendicularly; wherein... The punching section includes a main body section, a hole-expanding section and a tip section arranged in sequence. A limiting mechanism is formed between the main body section and the hole-expanding section, and a preset punching depth is formed between the tip section and the limiting mechanism. The cross-section of the tip section gradually decreases from the hole-expanding section towards the end.

[0006] In one embodiment, the outer diameter of the main body segment is larger than the outer diameter of the enlarged hole segment, and the limiting mechanism is a stepped surface between the main body segment and the enlarged hole segment.

[0007] In one embodiment, a mounting hole is provided at the intersection of the main body segment and the enlarged hole segment, and the limiting mechanism is a limiting pin inserted into the mounting hole.

[0008] In one embodiment, the cross-sectional diameter of the enlarged section gradually decreases from the main body section toward the tip section.

[0009] In one embodiment, the outer peripheral wall of the enlarged section is recessed to form multiple pressure-reducing grooves, which extend from the tip section toward the main body section.

[0010] In one embodiment, the pressure-reducing grooves are evenly distributed around the centerline of the enlarged section, and the pressure-reducing grooves are arc-shaped grooves or V-shaped grooves.

[0011] In one embodiment, the tip segment is conical, pyramidal, or wedge-shaped.

[0012] In one embodiment, the hardness of the tip segment is greater than the hardness of the reaming segment.

[0013] In one embodiment, the handle portion includes a handle body and at least one handle protrusion protruding from both sides of the handle body, and the perforated portion and the handle body are integrally formed; or, the perforated portion is detachably connected to the handle body.

[0014] In one embodiment, the microfracture opener further includes a silicone sleeve fitted onto the handle protrusion.

[0015] The technical solution provided by the embodiments of this utility model can include the following beneficial effects: the limiting mechanism can limit the drilling depth of the expanding section, thereby avoiding excessive drilling by the microfracture opener. The tip section, as the part that breaks through the bone layer, constitutes a tip puncture. The expanding section gradually enlarges and provides support for the tip section, which can both prevent the damage from spreading and prevent bone fragments from being generated. The handle section, as the impact and operation part, can be impacted by an impacting object, and can be pulled or twisted through the handle section, providing a force support structure. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0017] Figure 1 This is a schematic diagram illustrating a microfracture opening device according to an exemplary embodiment.

[0018] Figure 2 This is a cross-sectional schematic diagram of a microfracture opening device according to an exemplary embodiment.

[0019] Figure 3 This is a front view schematic diagram of a microfracture opening device according to an exemplary embodiment.

[0020] Figure 4 yes Figure 3 Enlarged diagram of point A in the middle.

[0021] Figure 5This is a front view schematic diagram illustrating a microfracture opening device with another limiting mechanism according to an exemplary embodiment.

[0022] In the figure, the handle part is 10; the handle body is 11; the handle protrusion is 12; the punching part is 20; the main body section is 21; the enlarged hole section is 22; the pressure relief groove is 221; the tip section is 23; the limiting mechanism is 24; the stepped surface is 241; the limiting pin is 242; and the silicone sleeve is 30. Detailed Implementation

[0023] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0024] like Figures 1 to 3 As shown, this utility model provides a depth-limited microfracture opening device, which can drill holes in cartilage tissue and bones at joint sites.

[0025] The microfracture opening device includes a handle portion 10 and a perforated portion 20 fixed to the handle portion 10, with the handle portion 10 and the perforated portion 20 forming an integral structure. In one embodiment, the handle portion 10 and the perforated portion 20 are integrally formed; alternatively, they are welded together to form an integral structure, resulting in high overall structural strength and good performance stability. In another embodiment, the handle portion 10 and the perforated portion 20 are detachably connected to improve their replaceability. For example, the perforated portion 20 and the handle portion 10 are spirally connected for quick removal. Alternatively, the perforated portion 20 and the handle portion 10 are plugged in, with the plugged portion of the perforated portion 20 and the handle portion 10 tightened for fixation.

[0026] The handle portion 10 and the drilling portion 20 are vertically arranged, which allows the impact force to be directly applied to the drilling position when the handle portion 10 is subjected to a vertical impact, concentrating the impact force and making drilling smooth. The handle portion 10 serves as both the impact part and the operating part, allowing the impact object to strike the handle portion 10 and enabling pulling or twisting operations, thus providing a force support structure.

[0027] The punching section 20 includes a main body section 21, a hole-expanding section 22 and a tip section 23 arranged sequentially. A limiting mechanism 24 is formed between the main body section 21 and the hole-expanding section 22. A preset punching depth is formed between the tip section 23 and the limiting mechanism 24. The cross-section of the tip section 23 gradually decreases from the hole-expanding section 22 towards the end.

[0028] The main body segment 21 has a columnar structure, allowing adjustment of the overall length of the perforation section 20. The expanding segment 22 and the tip segment 23 are located at the end of the perforation section 20, enabling drilling deep into the area to be perforated. The tip segment 23 serves as the site for breaking through the bone layer, constituting a tip puncture. The expanding segment 22 gradually enlarges and provides support for the tip segment 23, preventing further damage and bone fragmentation.

[0029] The limiting mechanism 24 can limit the drilling depth of the enlarged section 22, thereby preventing the microfracture opener from drilling too deeply. For example, if the maximum drilling depth is limited to 5mm-10mm, then the distance between the limiting mechanism 24 and the tip section 23 is 5mm-10mm. Specifically, the maximum drilling depth can be set to 5mm, 6mm, 8mm, 9mm, or 10mm.

[0030] The limiting mechanism 24 can limit the drilling depth, and it can be limited by a lateral protruding boss structure or by a stepped surface 241 structure.

[0031] like Figure 3 and Figure 4 As shown, in one embodiment, the outer diameter of the main body segment 21 is larger than the outer diameter of the enlarged hole segment 22, and the limiting mechanism 24 is a stepped surface 241 between the main body segment 21 and the enlarged hole segment 22. The main body segment 21 and the enlarged hole segment 22 form a stepped shaft structure. The main body segment 21 can improve the structural strength. Preferably, the main body segment 21 is a cylindrical structure, and the enlarged hole segment 22 is formed by a partial protrusion from the end of the main body.

[0032] like Figure 2 and Figure 5 As shown, in another embodiment, a mounting hole is provided at the intersection of the main body segment 21 and the enlarged hole segment 22, and the limiting mechanism 24 is a limiting pin 242 inserted into the mounting hole. The mounting hole penetrates the drilled portion 20, and preferably, the centers of the mounting hole and the drilled portion 20 intersect perpendicularly. The limiting pin 242 is inserted into and tightly fitted to the mounting hole, and both ends of the limiting pin 242 extend beyond the enlarged hole segment 22, which can form a partial limit and can be used for positioning. The partially protruding limiting pin 242 can facilitate observation of the drilling depth and improve the ease of observation.

[0033] The enlarged section 22 protrudes centrally from the end of the main body section 21. Preferably, the cross-sectional diameter of the enlarged section 22 gradually decreases from the main body section 21 towards the tip section 23 to form a tapered structure. During the drilling process, the enlarged section 22 can gradually enlarge along the drilling position, reducing the risk of secondary damage.

[0034] like Figures 1 to 5As shown, furthermore, the outer peripheral wall of the expanding section 22 is recessed to form multiple pressure-reducing grooves 221, which extend from the tip section 23 toward the main body section 21. The pressure-reducing grooves 221 are obliquely disposed on the surface of the expanding section 22, allowing for localized pressure relief during the expanding process, thus preventing excessive local pressure at the drilling position 20 from causing breakage. For example, the pressure-reducing grooves 221 can be configured as two, three, four, five, or six, etc.

[0035] Multiple pressure-reducing grooves 221 are evenly distributed around the center line of the expansion section 22, which can maintain the uniformity of force distribution and greatly ensure that the impact force in all directions is consistent.

[0036] Preferably, the pressure-reducing groove 221 is an arc-shaped groove or a V-shaped groove. Among them, the cross-section of the arc-shaped groove is concave arc-shaped, with high smoothness.

[0037] The tip section 23 gradually decreases in size from the expanding section 22. The tip section 23 is used to break open the area to be drilled. The tip section 23 can be conical, pyramidal, or wedge-shaped. The conical shape is a pointed structure that performs the drilling operation through a piercing structure.

[0038] The axial dimension of the tip section 23 is much smaller than that of the reaming section 22, forming a centrally located, rapid-breaking zone with a drilling position. Furthermore, the hardness of the tip section 23 is greater than that of the reaming section 22. Both the tip section 23 and the reaming section 22 are made of metal; preferably, the drilling portion 20 is made of stainless steel or titanium alloy.

[0039] In one embodiment, the handle portion 10 includes a handle body 11 and at least one handle protrusion 12 protruding from both sides of the handle body 11. The handle protrusion 12 may have a straight, cross-shaped, L-shaped, or radial strip structure, etc.

[0040] Preferably, the perforated portion 20 and the handle 11 are integrally formed, wherein the handle 11 and the perforated portion 20 are welded together or integrally formed. Preferably, the cross-sectional width of the handle 11 is greater than or equal to the diameter of the perforated portion 20, and the larger area of ​​the handle 11 can improve the convenience of impact.

[0041] Preferably, the perforated portion 20 is detachably connected to the handle 11. Optionally, the perforated portion 20 is screwed to the handle 11, wherein the handle 11 is provided with a connecting hole, and the perforated portion 20 is provided with a threaded portion, the threaded portion being screwed to the connecting hole. Optionally, the handle 11 is provided with a countersunk mounting hole, and the end of the handle 11 is interference-fitted with the mounting hole to form a plug-in fit.

[0042] Furthermore, the microfracture opener also includes a silicone sleeve 30, which is fitted onto the handle protrusion 12. This facilitates assembly, and the overall structure is elastic, providing high comfort. Preferably, the cross-sectional dimension of the handle body 11 is larger than that of the handle protrusion 12, and the maximum outer peripheral wall dimension formed by the silicone sleeve 30 fitted onto the handle protrusion 12 is greater than or equal to the cross-sectional dimension of the handle body 11.

[0043] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A depth-limiting microfracture opening device, characterized in that, The microfracture mouth opener includes a handle and a perforated portion fixed to the handle, wherein the handle and the perforated portion are arranged perpendicularly; wherein... The punching section includes a main body section, a hole-expanding section and a tip section arranged in sequence. A limiting mechanism is formed between the main body section and the hole-expanding section, and a preset punching depth is formed between the tip section and the limiting mechanism. The cross-section of the tip section gradually decreases from the hole-expanding section towards the end.

2. The microfracture opening device according to claim 1, characterized in that, The outer diameter of the main body section is larger than the outer diameter of the enlarged hole section, and the limiting mechanism is a stepped surface between the main body section and the enlarged hole section.

3. The microfracture opening device according to claim 1, characterized in that, The intersection of the main body section and the enlarged hole section is provided with a mounting hole, and the limiting mechanism is a limiting pin inserted into the mounting hole.

4. The microfracture opening device according to claim 1, characterized in that, The cross-sectional diameter of the enlarged section gradually decreases from the main body section toward the tip section.

5. The microfracture opening device according to claim 4, characterized in that, The outer peripheral wall of the enlarged section is recessed to form multiple pressure-reducing grooves, which extend from the tip section toward the main body section.

6. The microfracture opening device according to claim 5, characterized in that, The pressure-reducing grooves are evenly distributed around the centerline of the enlarged section, and the pressure-reducing grooves are arc-shaped grooves or V-shaped grooves.

7. The microfracture opening device according to claim 1, characterized in that, The pointed end is conical, pyramidal, or wedge-shaped.

8. The microfracture opening device according to claim 1, characterized in that, The hardness of the tip section is greater than that of the reaming section.

9. The microfracture opening device according to claim 1, characterized in that, The handle portion includes a handle body and at least one handle protrusion protruding from both sides of the handle body; the perforated portion and the handle body are integrally formed; or, the perforated portion is detachably connected to the handle body.

10. The microfracture opening device according to claim 9, characterized in that, The microfracture opener also includes a silicone sleeve fitted onto the handle protrusion.

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