Adjustable operating part and ultrasonic osteotome

Abstract

The ultrasonic osteotome comprises an osteotome body and a sleeve, the sleeve comprises an outer sleeve body and an inner sleeve body, the osteotome body is fixedly arranged in the outer sleeve body and extends out of the far end of the outer sleeve body, a limiting section is arranged at the position, close to the far end of the outer sleeve body, in the outer sleeve body, and the inner diameter of the limiting section is consistent. The bone knife is sleeved with the inner sleeve, the inner sleeve is movably arranged in the limiting section, the inner sleeve axially moves relative to the outer sleeve to increase or decrease the length of the sleeve so as to be matched with the bone knife, and a limiting mechanism is arranged between the limiting section and the near end of the inner sleeve. And the position of the inner sleeve is limited. The inner sleeve which moves relative to the outer sleeve is arranged at the far end of the outer sleeve, so that the overall length of the sleeve can be flexibly adjusted through the movement of the inner sleeve, the adaptability of the sleeve is greatly improved, and the sleeve can adapt to osteotome with different lengths and models.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic bone cutters, in particular to an adjustable operating component and an ultrasonic bone cutter. Background Art

[0002] The ultrasonic bone knife uses high-intensity focused ultrasound technology to convert electrical energy into mechanical energy through a transducer. Through high-frequency ultrasonic oscillations, the water in the contacted tissue cells is vaporized and the protein hydrogen bonds are broken, thereby completely destroying the bone tissue that needs to be cut during the operation. It has the advantages of high frequency, low temperature, high efficiency and less damage.

[0003] As disclosed in publication numbers WO 2014 / 150526 Al and US 2023 / 0210549 Al, the ultrasonic bone knife is provided with a matching external sleeve on the outside, but the existing sleeve is basically an integrated structure, which does not have a telescopic function, and the adapter between it and the bone knife is a fixed structure. When it is too long, it will hinder the surgical field of view and operating space of the bone knife tip. When it is too short, it will shorten the cooling space, making it impossible to cool the tip of the knife. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provide an adjustable operating element and an ultrasonic osteotome.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] An adjustable operating member includes a bone cutter and a sleeve, wherein the sleeve includes an outer sleeve and an inner sleeve, the bone cutter is fixedly arranged in the outer sleeve and extends from its distal end, a limiting section is arranged in the outer sleeve near its distal end, the inner diameter of the limiting section is consistent, the inner sleeve is sleeved on the bone cutter and can be movably arranged in the limiting section, the inner sleeve expands or reduces the length of the sleeve by axially moving relative to the outer sleeve to adapt to the bone cutter, and a limiting mechanism is arranged between the limiting section and the proximal end of the inner sleeve to limit the position of the inner sleeve.

[0007] Preferably, the limiting mechanism is a sealing ring embedded in the proximal outer periphery of the inner sleeve, and the sealing ring is tightly attached to the inner wall of the limiting section, so that when no external force is applied, the sealing ring and the inner surface of the limiting section are interference fit to limit the position of the inner sleeve.

[0008] Preferably, the limiting mechanism is an elastic member fixed on the inner surface of the limiting section, and the elastic member extends from the proximal end of the limiting section to the distal end thereof. Its own elasticity enables the elastic member to fit tightly with the proximal outer wall of the inner sleeve to limit the position of the inner sleeve when no external force is applied.

[0009] Preferably, the elastic member is an integral tubular component matching the inner contour of the limiting section, and the outer wall of the elastic member is fixedly connected to the inner contour of the limiting section as a whole.

[0010] Preferably, the elastic members are in strip shape, and a group of the elastic members are evenly distributed in an axial array along the inner wall of the limiting section.

[0011] Preferably, a first step surface is provided in the distal port of the outer sleeve, and a second step surface matching the first step surface is formed at the proximal end of the inner sleeve, and the first step surface abuts against the second step surface to limit the limit position of the inner sleeve moving toward the distal end of the bone knife.

[0012] Preferably, the limiting mechanism is an internal thread provided on the inner surface of the limiting section and an external thread provided on the proximal outer wall of the inner sleeve, and the inner sleeve is threadedly connected to the limiting section.

[0013] Preferably, a second sleeve is fixed inside the outer sleeve, and the second sleeve is located between the proximal end of the outer sleeve and the proximal end of the limiting section. The outer walls at both ends of the second sleeve are sealed and connected to the inner wall of the outer sleeve through a second sealing ring, and the gap between the second sleeve and the outer sleeve forms a cooling cavity that can be connected to the coolant.

[0014] Preferably, the proximal end of the outer sleeve is provided with a water inlet channel connected to the cooling cavity, and the distal end of the second sleeve is provided with a water outlet channel connected to the cooling cavity, and a gap is formed between the inner walls of the second sleeve and the inner sleeve and the outer wall of the bone knife, so that the coolant flows into the water outlet channel and wraps the bone knife for cooling.

[0015] The ultrasonic bone knife comprises a handpiece and the adjustable operating member as described above, wherein the distal end of the handpiece is fixedly connected to the proximal end of the sleeve and an angle is formed therebetween, and the handpiece has a built-in transducer which is connected to the bone knife and transmits mechanical energy to the bone knife.

[0016] The beneficial effects of the utility model are mainly reflected in:

[0017] 1. An inner sleeve is arranged at the distal end of the outer sleeve and moves relatively thereto, so that the sleeve can flexibly adjust its overall length by moving the inner sleeve to accurately fit the bone cutter, so that it can support the bone cutter while providing sufficient surgical field to facilitate operation, and greatly improve the adaptability of the sleeve so that it can fit a variety of bone cutters of different lengths;

[0018] 2. The bone knife is a knife with a large swing amplitude at its distal end. The inner sleeve is sleeved on the distal end of the outer sleeve. The two are partially overlapped so that the portion of the sleeve near the distal end of the bone knife is more rigid, which can provide better support and protection for the bone knife. The inner sleeve only needs a short length to play a flexible adjustment role, which is easy to manufacture and low in cost. At the same time, the inner sleeve is a rigid structure, and its relatively short structure can enhance its own rigidity, so that the inner sleeve and the outer sleeve form a rigid fit, which is more stable and not easy to break.

[0019] 3. The limiting mechanism between the inner sleeve and the outer sleeve has a variety of feasible ways to achieve movement through an elastic structure or a threaded structure while being able to stop positioning at any time, so that the inner sleeve can be fixed at any position within its moving range, maximizing the flexibility of adjustment;

[0020] 4. The structure in which the inner sleeve is sleeved on the distal end of the outer sleeve can leave enough space inside the outer sleeve to set up a cooling chamber, so that cooling water can be connected to the inside of the sleeve to cool the bone knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0022] Figure 1 : A partial cross-sectional view of the ultrasonic osteotome of the first embodiment provided with a limiting mechanism;

[0023] Figure 2 : A cross-sectional view of a second embodiment of the limiting mechanism;

[0024] Figure 3 : A cross-sectional view of a third embodiment of the limiting mechanism;

[0025] Figure 4 : A cross-sectional view of a fourth embodiment of a limiting mechanism;

[0026] Figure 5 : Partial cross-sectional view of the adjustable operating part. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0028] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0029] like Figures 1 to 5 As shown, the utility model discloses an adjustable operating member, including a bone cutter 1 and a sleeve 2, the sleeve 2 including an outer sleeve 201 and an inner sleeve 202, the bone cutter 1 is fixed in the outer sleeve 201 and extends from its distal end, a limiting section 2011 is arranged in the outer sleeve 201 near its distal end, the inner diameter of the limiting section 2011 is consistent, the inner sleeve 202 is sleeved on the bone cutter 1 and can be movably arranged in the limiting section 2011, the inner sleeve 202 expands or reduces the length of the sleeve 2 by axial movement relative to the outer sleeve 201 to adapt to the bone cutter 1, and a limiting mechanism is arranged between the limiting section 2011 and the proximal end of the inner sleeve 202 to limit the position of the inner sleeve 202.

[0030] In this solution, an inner sleeve 202 is provided at the distal end of the outer sleeve 201, which is movable relative to the outer sleeve 201, so that the sleeve 2 can flexibly adjust its overall length by moving the inner sleeve 202, so as to accurately match the bone cutter 1, so that it can support the bone cutter 1 while providing a sufficient surgical field of view for easy operation, and greatly improve the adaptability of the sleeve 2, so that it can adapt to a variety of bone cutters 1 of different lengths. The bone cutter 1 in this solution can have a variety of lengths, which are not limited here.

[0031] The bone cutter 1 is a tool with a large swing amplitude at its distal end. The inner sleeve 202 and the outer sleeve 201 are made of the same material and are both rigid structures. The inner sleeve 202 is sleeved on the distal end of the outer sleeve 201, so that the two are partially overlapped in structure. Such a structure can make the part of the sleeve 2 near the distal end of the bone cutter 1 more rigid, so as to provide better support and protection for the bone cutter 1. On the other hand, the structure in which the inner sleeve 202 is inserted into the outer sleeve 201 also allows the inner sleeve 202 to play a flexible adjustment role with only a short length, which is easy to manufacture and low in cost. At the same time, as a rigid structure, the relatively short structure of the inner sleeve can enhance its own rigidity, so that a rigid fit is formed between the inner sleeve 202 and the outer sleeve 201, which is more stable and not easy to break.

[0032] The limiting mechanism between the inner sleeve 201 and the outer sleeve 201 has a variety of feasible modes, which can realize movement through an elastic structure or a threaded structure while being able to stop positioning at any time, so that the inner sleeve 202 can be fixed at any position within its moving range, thereby maximizing the flexibility of adjustment.

[0033] Specifically, Figure 1 As shown, in the first embodiment, the limiting mechanism is a sealing ring 203 embedded in the outer periphery of the proximal end of the inner sleeve 202, and the sealing ring 203 is in close contact with the inner wall of the limiting section 2011, so that when no external force is applied, the sealing ring 203 and the inner surface of the limiting section 2011 are interference-fitted to limit the position of the inner sleeve 202. The sealing ring 203 is made of a high-density and high-elasticity material such as rubber. The elasticity of the sealing ring 203 allows it to deform under the action of external force, and the inner sleeve 202 can be pulled or selected to move axially to adjust its specific position relative to the limiting section 2011 to achieve the adjustment effect. When no external force is applied, the sealing ring 203 uses its elasticity to make it tightly fit between the limiting section 2011 and the proximal end of the inner sleeve 202, so that the inner sleeve 202 remains stationary under the action of static friction.

[0034] Similarly, if Figure 2 As shown, in the second embodiment, the limiting mechanism is an elastic member 204 fixed on the inner surface of the limiting section 2011, and the elastic member 204 extends from the proximal end of the limiting section 2011 to its distal end. Its own elasticity makes it possible for the elastic member 204 to fit tightly with the proximal outer wall of the inner sleeve 202 to limit the position of the inner sleeve 202 when no external force is applied.

[0035] The elastic member 204 is made of a highly elastic material such as rubber, and is an integral tubular member that matches the inner contour of the limiting section 2011, so that the outer wall of the elastic member 204 is fixedly connected to the inner contour of the limiting section 2011. Such a structure allows the inner wall of the limiting section 2011 to be elastic, so that the proximal end of the inner sleeve 202 can slide along the inner wall of the limiting section 2011, and can also stop at any time.

[0036] like Figure 3 As shown, in the third embodiment, the difference between the third embodiment and the second embodiment lies in that the elastic member 204 is in the shape of a strip, a group of the elastic members 204 are evenly distributed in an axial array along the inner wall of the limiting section 2011, and the proximal end of the inner sleeve 202 is slidably fitted with the inner wall of the limiting section 2011, so that it can slide along the inner wall of the limiting section 2011 and can stop at any time.

[0037] Furthermore, a first step surface 2012 is provided in the distal port of the outer sleeve 201, and a second step surface 2021 matching the first step surface 2012 is formed at the proximal end of the inner sleeve 202. The first step surface 2012 abuts against the second step surface 2021 to form a hard limit to limit the limit position of the inner sleeve 202 moving toward the distal end of the bone knife 1, thereby preventing the inner sleeve 202 from being pulled out of the outer sleeve 201.

[0038] like Figure 4 As shown, in the fourth embodiment, the limiting mechanism is an internal thread arranged on the inner surface of the limiting section 2011 and an external thread arranged on the proximal outer wall of the inner sleeve 202. The inner sleeve 202 is screwed to the limiting section 2011, and the two are screwed to achieve infinite length adjustment.

[0039] Furthermore, the structure in which the inner sleeve 202 is sleeved inside the distal end of the outer sleeve 201 can leave enough space inside the outer sleeve 201 to set a cooling structure, so that the inside of the sleeve 2 can realize the cooling function of the bone knife 1.

[0040] Specifically, Figure 5 As shown, a second sleeve 205 is fixedly provided inside the outer sleeve 201, and the second sleeve 205 is located between the proximal end of the outer sleeve 201 and the proximal end of the limiting section 2011, and the outer walls at both ends of the second sleeve 205 are sealedly connected to the inner wall of the outer sleeve 201 through a second sealing ring 206, respectively, and the gap between the second sleeve 205 and the outer sleeve 201 forms a cooling cavity 200 that can be connected to the coolant.

[0041] The proximal end of the outer sleeve 201 is provided with a water inlet channel 2013 connected to the cooling cavity 200, and the distal end of the second sleeve 205 is provided with a water outlet channel 2051 connected to the cooling cavity 200. The inner walls of the second sleeve 205 and the inner sleeve 202 form a gap with the outer wall of the bone knife 1, so that the coolant flows into the water outlet channel 2051 and wraps the bone knife 1 for cooling.

[0042] In a preferred embodiment, the cross-section of the cooling cavity 200 is annular, and the extension direction of the water inlet channel 2013 is tangent to the cross-section of the cooling cavity 200, so that the coolant enters in a direction tangent to the cooling cavity 200, thereby forming a fluid ring that spirals around the second sleeve 205 to flow from the proximal end of the cooling cavity 200 to its distal end, forming a uniform and comprehensive cooling effect.

[0043] Further, such as Figure 1 and Figure 5 As shown, the present solution also discloses an ultrasonic bone cutter, comprising a handpiece 3 and the adjustable operating member as described above, wherein the distal end of the handpiece 3 is fixedly connected to the proximal end of the sleeve 2, and an angle is formed between the two, so that the distal end of the bone cutter 1 has a good surgical field of view and operating space. The handpiece 3 is built with a transducer connected to the bone cutter 1 and transmitting mechanical energy to the bone cutter 1. The handpiece 3 is also provided with conventional structures such as a flushing pipeline connected to the water inlet channel 2013.

[0044] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0045] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. Adjustable operating member, characterized in that: The invention comprises a bone cutter (1) and a sleeve (2), wherein the sleeve (2) comprises an outer sleeve (201) and an inner sleeve (202), wherein the bone cutter (1) is fixedly arranged in the outer sleeve (201) and extends from the distal end thereof, wherein a limiting section (2011) is arranged in the outer sleeve (201) near the distal end thereof, wherein the inner diameter of the limiting section (2011) is consistent, wherein the inner sleeve (202) is sleeved on the bone cutter (1) and can be movably arranged in the limiting section (2011), wherein the inner sleeve (202) can expand or reduce the length of the sleeve (2) by axially moving relative to the outer sleeve (201) so as to be compatible with the bone cutter (1), and wherein a limiting mechanism is arranged between the limiting section (2011) and the proximal end of the inner sleeve (202) so as to limit the position of the inner sleeve (202).

2. The adjustable operating member according to claim 1, characterized in that: The limiting mechanism is a sealing ring (203) embedded in the proximal outer periphery of the inner sleeve (202), and the sealing ring (203) is tightly attached to the inner wall of the limiting section (2011), so that when no external force is applied, the sealing ring (203) and the inner surface of the limiting section (2011) are interference-fitted to limit the position of the inner sleeve (202).

3. The adjustable operating member according to claim 1, characterized in that: The limiting mechanism is an elastic member (204) fixed on the inner surface of the limiting section (2011); the elastic member (204) extends from the proximal end of the limiting section (2011) to its distal end; its own elasticity enables the elastic member (204) to tightly fit with the proximal outer wall of the inner sleeve (202) to limit the position of the inner sleeve (202) when no external force is applied.

4. The adjustable operating member according to claim 3, characterized in that: The elastic member (204) is an integral tubular component that matches the inner contour of the limiting section (2011); the outer wall of the elastic member (204) is fixedly connected to the inner contour of the limiting section (2011) as a whole.

5. The adjustable operating member according to claim 3, characterized in that: The elastic members (204) are strip-shaped, and a group of the elastic members (204) are evenly distributed in an axial array along the inner wall of the limiting section (2011).

6. The adjustable operating member according to claim 2, 4 or 5, characterized in that: A first step surface (2012) is provided in the distal end port of the outer sleeve (201), and a second step surface (2021) matching the first step surface (2012) is formed at the proximal end of the inner sleeve (202), and the first step surface (2012) abuts against the second step surface (2021) to limit the limit position of the inner sleeve (202) moving toward the distal end of the bone knife (1).

7. The adjustable operating member according to claim 1, characterized in that: The limiting mechanism comprises an internal thread provided on the inner surface of the limiting section (2011) and an external thread provided on the proximal outer wall of the inner sleeve (202); the inner sleeve (202) is threadedly connected to the limiting section (2011).

8. The adjustable operating member according to claim 6, characterized in that: A second sleeve (205) is also fixedly disposed inside the outer sleeve (201), and the second sleeve (205) is located between the proximal end of the outer sleeve (201) and the proximal end of the limiting section (2011). The outer walls at both ends of the second sleeve (205) are sealedly connected to the inner wall of the outer sleeve (201) via second sealing rings (206), and the gap between the second sleeve (205) and the outer sleeve (201) forms a cooling cavity (200) that can communicate with a coolant.

9. The adjustable operating member according to claim 8, characterized in that: The proximal end of the outer sleeve (201) is provided with a water inlet channel (2013) connected to the cooling cavity (200), and the distal end of the second sleeve (205) is provided with a water outlet channel (2051) connected to the cooling cavity (200). A gap is formed between the inner walls of the second sleeve (205) and the inner sleeve (202) and the outer wall of the bone knife (1), so that cooling liquid flows into the water outlet channel (2051) and wraps around the bone knife (1) to reduce the temperature.

10. Ultrasonic osteotome, characterized by: The invention comprises a hand piece (3) and an adjustable operating piece as claimed in any one of claims 1 to 9, wherein the distal end of the hand piece (3) is fixedly connected to the proximal end of the sleeve (2) and an angle is formed between the two, and the hand piece (3) has a built-in transducer which is connected to the bone knife (1) and transmits mechanical energy to the bone knife (1).

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