Surgical device with elastic coupling

Abstract

An instrument for intracavity surgery in narrow spaces comprises a universal joint and an elastic part, wherein the elastic part is threadedly and detachably engaged with the universal joint for micro self-locking to improve vibration resistance and positioning stability. By bending the elastic part, the user can flexibly adjust the angle range of scraping, supporting, or cleaning tissues. The present invention also comprises at least one operating part to realize the function of field of vision cleaning, fluid guiding, and elimination.

Description

[0001] SURGICAL DEVICE WITH ELASTIC COUPLING

[0002] BACKGROUND OF THE INVENTION

[0003] Related Application

[0004] This application claims priority to U.S. Provisional Patent Application Ser. No. 63 / 438,793, filed on Jan. 13, 2023, entitled "Novel device attaching endoscopic accessories and its method of usage in periodontal disease." U.S. Provisional Patent Application Ser. No. 63 / 465,540, filed on May. 11, 2023, entitled "Novel dental device with functions of directional fixation, air inflation, and suction." Each of these patent applications is herein incorporated by reference in its entirety for all purposes.

[0005] Field of the Invention

[0006] The present disclosure relates to an instrument and kit thereof, in particular with an elastic parts surgical instrument for dental surgery, sinus surgery, soft tissue, or intracavitary surgery.

[0007] Description of Related Art

[0008] During dental surgery or the treatment of narrow cavities, doctors or users often use water jets or suction devices to assist in the removal of fluids generated during the surgical procedure. However, the design of surgical instruments of the prior art usually lacks flexible connecting elements, which makes it difficult to adjust multiple angles and fix the optimal operating angle during surgery or treatment, especially in narrow spaces such as the oral cavity and nasal cavity. In addition, although existing surgical instruments can provide different operating elements interchangeably, most of the joining methods do not have stable fine-tuning and anti-loosening designs, and do not incorporate a flow-guiding function to enhance fluid stability and cleaning efficiency. Therefore, there is an urgent need for an improved combination of connectors and fittings with high flexibility, good positioning, and the ability to effectively guide air or fluid flow to improve the feel of operation, enhance stability, and improve the effectiveness of the surgical instruments.

[0009] SUMMARY Concerning the issues mentioned above, an instrument with an elastic part is provided in this disclosure, which provides the instrument with elastic components that can be used for various narrow cavity surgeries. In accordance with this present invention, the instrument with the elastic part that is useful for performing an endodontic or intracavity surgery through a micro self-locking function. The instrument with the elastic part of the present invention comprises a universal joint and an elastic part, wherein the universal joint comprises at least one connecting part with external threads, and the elastic part threadedly and detachably engages with the external threads of at least one connecting part of the universal joint.

[0010] Preferably, the number of at least one connecting part is one.

[0011] More preferably, the number of at least one connecting part is two, and these two connecting parts are adjacent to each other, the angle between the two connecting parts is about 180 degrees or less than 180 degrees; the elastic part is bended and the two ends of the elastic part are respectively connected to the two connecting parts.

[0012] In one embodiment of the present invention, the universal joint further comprises a halfball head, a base, and an opening, wherein the half-ball head is located relative to the base; and the opening is adjacent to the base.

[0013] In another embodiment of the present invention, the universal joint further comprises at least three flow guide elements arranged annularly and equally on the inner wall surface of the base.

[0014] Preferably, each flow guide element of the present invention extends in an arc shape and extends from the inner wall surface toward the direction of the opening to form a flow guide slope; a high end of the flow guide slope faces the inner wall surface of the base, and a low end of the flow guide slope faces the opening; the bottoms of each guide element extend toward each other to form a guide groove, and each guide groove is perpendicular to the axis direction of the halfball head of the universal joint.

[0015] Preferably, at least three flow guide elements of the present invention further comprise at least two guide extensions formed by extending from the high end of the flow guide slope towards the hall-ball head along the inner wall, and they are oppositely arranged on the inner wall.

[0016] In one aspect of the present invention, the instrument of the present invention further comprises at least one operating part detachably connected to the elastic part, wherein the at least one operating part comprises a handle portion and a bent portion; the handle portion is connected to the bent portion, and a predetermined angle is between the handle portion and the bent portion.

[0017] In one embodiment of the present invention, at least one operating part further comprises a mirror, the mirror is connected to the bent portion, and the bent portion is located between the handle portion and the mirror.

[0018] In another embodiment of the present invention, at least one operating part further comprises a tapered socket; the tapered socket is connected to the bent portion, and the bent portion is located between the handle portion and the tapered socket.

[0019] In another embodiment of the present invention, at least one operating part further comprises a T-shape end, wherein the T-shaped end is connected to the handle at the end opposite to the mirror or the tapered socket.

[0020] Preferably, at least one operating part is made of memory metal, and the content of memory metals comprises nickel-titanium-based shape memory alloy (Ni-Ti SMA), copper-based shape memory alloy (Cu SMA), or iron-based shape memory alloy (Fe SMA).

[0021] More preferably, the content of at least one memory metal strip is selected from the group consisting of gold-cadmium (Au-Cd), silver-cadmium (Ag-Cd), copper-zinc (Cu-Zn), copper- zinc-aluminum (Cu-Zn-Al), copper-zinc-tin (Cu-Zn-Sn), copper-zinc-silicon (Cu-Zn-Si), coppertin (Cu-Sn), copper-zinc-gallium (Cu- Zn-Ga), indium-titanium (In-Ti), gold-copper-zinc (Au-Cu- Zn), nickel-aluminum (Ni-Al), iron-platinum (Fe-Pt), titanium-nickel (Ti-Ni), titanium-nickel- palladium (Ti-Ni-Pd), titanium-niobium (Ti-Nb), uranium-niobium (U-Nb) and iron-manganese- silicon (Fe-Mn-Si).

[0022] In yet aspect of the present invention, the present invention also discloses an instrument kit that comprises the above-mentioned instrument, and further comprises a hollow handle and a connecting rod, wherein the hollow handle has a front end; the connecting rod is detachably connected to the hollow handle.

[0023] The instrument and kit thereof described in the present invention provides a micro selflocking function through the elastic part, which can not only improve the shock resistance and positioning stability during the operation, but also allow the user to flexibly adjust, scrape, open or clean the surgical site in a narrow cavity by bending the elastic member.

[0024] Other aspects and advantages of the disclosure will become apparent from the following detailed description, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 is a schematic diagram of the present invention.

[0026] FIG. 2 is a partially enlarged schematic diagram of FIG. 1.

[0027] FIG. 3 is an exploded view of the present invention.

[0028] FIG. 4 is a sectional view of the present invention.

[0029] FIG. 5 is a schematic diagram showing the connection between the elastic part and at least one operating part, and the universal joint according to the present invention.

[0030] FIG. 6A is an exploded schematic diagram showing two connecting parts of the universal joint being respectively sleeved with the two ends of the elastic part according to the present invention.

[0031] FIG. 6B is an exploded schematic diagram showing two connecting parts of the universal joint being respectively sleeved with the two ends of the elastic part according to the present invention.

[0032] FIG. 7 A is a sectional view of the universal joint of the present invention.

[0033] FIG. 7B is a schematic diagram of the universal joint of the present invention.

[0034] FIG. 7C is a bottom view of the universal joint of the present invention.

[0035] FIG. 8A is a bottom view of a plurality of flow guide elements of the present invention.

[0036] FIG. 8B is a schematic diagram of the universal joint with at least one connecting part of the present invention.

[0037] FIG. 9 is an exploded schematic diagram of at least one connecting part and an elastic part of the universal joint being sleeved together according to the present invention.

[0038] FIG. 10 is an exploded schematic diagram of at least one connecting member of the universal joint being sleeved with the elastic part and at least one operating part according to the present invention.

[0039] FIG. 11 is an exploded schematic diagram of the universal joint being connected with the elastic part, at least one operating part, and the operating part through at least one connecting part according to the present invention.

[0040] FIG. 12 is a schematic diagram showing that the universal joint is connected with the elastic part, at least one operating part, and the operating part through at least one connecting part according to the present invention. FIG. 13 is an exploded schematic diagram of the universal joint being connected with the elastic part, at least one operating part, and the operating part through at least one connecting part according to the present invention.

[0041] FIG. 14 is a schematic diagram showing that the universal joint is connected with the elastic part, the at least one operating part, and the operating part through at least one connecting part according to the present invention.

[0042] DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0043] The terminology used in the description presented below is intended to be interpreted in its broadest reasonable manner, even though it is used in conjunction with a detailed description of certain specific embodiments of the technology. Certain terms may even be emphasized below; however, any terminology intended to be interpreted in any restricted manner will be specifically defined as such in this Detailed Description section. Components and achievement of a borehole shield according to the present disclosure may be illustrated in the following drawings and embodiments. However, the size and shape shown on drawings for the borehole shield do not limit the features of the present disclosure.

[0044] The present invention provides an instrument with an elastic part for narrow-space surgery, such as performing oral or nasal surgery. Please refer to Fig. 1 and Fig. 2; the first embodiment of the instrument kit with the elastic part comprises a hollow handle 10, a connecting rod 20, a universal joint 30, and an elastic part 40.

[0045] As shown in Fig. 3, the hollow handle 10 has a front end 11. Preferably, the front end 11 of the hollow handle 10 has a threaded stud 111. In this embodiment, at least one oral or nasal- related surgical implement can be accommodated in the hollow handle 10. Preferably, at least one oral or nasal-related surgical instrument includes, but is not limited to, an endoscope, an imaging device, a light source, lasers, curettes, ultrasonically-powered tips, irrigation devices, and suction devices.

[0046] As shown in Figs. 3 and 4, the connecting rod 20 has a front end 21, a back end 22, and an internal thread 23, wherein the back end 22 is detachably connected to the threaded stud 111 of the hollow handle 10 through the internal thread 23. Preferably, the connecting rod 20 has a shape comprising tubular, cylindrical, conic, bullet-like, and truncated cone. The connecting rod 20 further comprises a socket 24 on the side, and the socket 24 is formed from the front end 21 extending toward the back end 22 and located between the front end 21 and the back end 22. Specifically, the socket 24 has a width DI.

[0047] As shown in Fig. 5, the universal joint 30 is a hollow tube body and has a half-ball head

[0048] 31, a base 32, and an opening 33, wherein the half-ball head 31 is located relative to the base 32, and the half-ball head 31 has a width D2. A neck is between the half-ball head 31 and the base

[0049] 32, with a width D3; the width D2 of the half-ball head 31 is larger than the width D3 of the neck. Specifically, the width D3 of the neck is fitted to the width DI of the socket 21 of the connecting rod 20 and the width DI of the socket 24 is less than the width D2 of the half-ball head 31, so the half-ball head 31 of the universal joint 30 can pivotally joint to the socket 24 of the connecting rod 20 for rotating in all directions. When the universal joint 30 is inserted through the socket 24 and the neck of the universal joint 30 is pressed against the socket 24, the universal joint 30 can be fixed by the connecting rod 20 connected to the threaded stud 111 of the hollow handle 10 through the internal thread 23, and the threaded stud 111 against the halfball head 31 of the universal joint 30, so that is assumed in a locked state. Similarly, when the threaded stud 111 of the hollow handle 10 is separated in the direction of the connecting rod 20, it is in a non-locked state, that is to say, the universal joint 30 can appropriately adjust the direction of rotation as required. The opening 33 is adjacent to the base 32. Preferably, the shape of the base 32 includes but is not limited to cylinders and elliptical cylinders. The universal joint 30 further comprises at least one connecting part 34 next to the base 32, wherein the front end of at least one connecting part 34 further comprises external threads 341. Preferably, the number of at least one connecting part 34 is one. More preferably, as shown in Figs. 6A and 6 B, the number of at least one connecting part 34 is two, and these two connecting parts 34 are adjacent to each other. In one example, as shown in Fig. 6 A, two connecting parts 34 are arranged opposite to each other, that is, the angle between the two connecting parts is about 180 degrees. In another example, two connecting parts 34 are located adjacent to each other, and the angle of the narrow angle between the two connecting sections is less than 180 degrees (refer to Fig. 6B).

[0050] In one embodiment of the present invention, as shown in Figs. 7A to 7C, the universal joint 30 further comprises at least three flow guide elements 35, which are equally disposed on the base 32 near the opening 33. Specifically, at least three flow guide elements 35 are arranged annularly and equally on the inner wall surface of the base 32. In this embodiment, each flow guide element 35 extends in an arc shape and extends from the inner wall surface toward the direction of the opening 33 to form a flow guide slope 351. More specifically, the high end of the flow guide slope 351 faces the inner wall surface of the base 32, and the low end of the flow guide slope 351 faces the opening 33. Preferably, the bottoms of each guide element 35 extend toward each other to form a guide groove 352, and each guide groove 352 is perpendicular to the axis direction of the half-ball head 31 of the universal joint 30. Preferably, the number of at least three flow guide elements 35 is three. Assuming the base 32 is cylindrical and the opening 34 has an imaginary center, each of the at least three flow guide elements 35 forms an imaginary straight line extending to the imaginary center, with each imaginary straight line spaced about 120 degrees apart from each other. Similarly, when the number of at least three flow guide elements 35 is four, each of these elements forms an imaginary straight line extending to the imaginary center, with each imaginary straight line spaced about 90 degrees apart from each other. Similarly, when the number of at least three flow guide elements 35 is six, each of these elements forms an imaginary straight line extending to the imaginary center, with each imaginary ray spaced about 60 degrees apart from each other.

[0051] At least three flow guide elements 35 can assist the airflow or water flow to be guided by at least three of flow guide elements 35, ensuring that when the airflow or water flow enters through the opening 33 of the universal joint 30 and passes towards the half-ball head 31, a non- turbulent airflow or water flow is formed. In other words, at least three flow guide elements 35 can reduce turbulence, thereby concentrating the airflow or water flow from the opening 33 towards the hall-ball head 31, preventing vortex formation, increasing the flow rate, and improving the uniformity of the airflow or water flow through the opening 33. Even when the invention is applied within a cavity with limited internal space, it can still achieve the effect of fixing the direction and increasing pressure. Specifically, when at least one surgical instrument used in narrow cavities (e.g., an endoscope with air and / or water flow) is accommodated in the universal joint 30, the flow guide slope 351 can guide the fluid (including gas or liquid) along the slope so that the fluid not only moves along the inner wall of the base 32 of the universal joint 30, but may also rotate around the inner wall of the base 32 to increase the mixing effect of the fluid, and the spiral airflow can reduce turbulence in the flow to increase the stability of the flow. The spiral airflow reduces turbulence in the flow and increases the stability of the flow. The guide groove 352 serves to guide the fluid (including gas or liquid) into a horizontal flow that cleans the opening 33 as well as the air or water outlet of the surgical instrument. Additionally, the fluid can flow linearly (i.e., from the opening 33 to the half-ball head 31) between each of the guide grooves 352. Overall, it can prevent the fluid from interfering with the field of view of the surgical instruments or devices, for example, endoscope, placed in the universal joint 30 to clean or flush the lens surface, and to adjust the ratio of linear and spiral fluids (including gas or liquid) by means of the slope 351 and the guide grooves 352.

[0052] In this embodiment, as shown in Figs. 8 A to 8B, at least three flow guide elements 35 further comprise at least two guide extensions 353. These guide extensions 353 are formed by extending from the high end of the flow guide slope 351 towards the hall-ball head 31 along the inner wall, and they are oppositely arranged on the inner wall. Specifically, when there are four flow guide elements 35, the number of guide extensions 353 is two, and the two guide extensions 383 are oppositely arranged (with an included angle of 180 degrees between them). Preferably, when there are six flow guide elements 35, there are four guide extensions 353, arranged in pairs. More specifically, two guide extensions 353 are adjacent to each other to form the first pair, and the other two guide extensions 353 are also adjacent to each other to form the second pair. The second pair of guide extensions 353 is oppositely arranged relative to the first pair of guide extensions 353. More preferably, when there are three flow guide elements 35, the present invention does not include at least two guide extensions 353.

[0053] As shown in Fig. 9, the elastic part 40 is detachably sleeved on at least one connecting part 34 of the universal joint 30. Specifically, the thread of the elastic part 40 is engineered to engage with the external thread 341 of at least one connecting part 34. More specifically, the pitch, diameter, thread angle, and cross-sectional shape of the elastic part 40 of the present invention all correspond to the external thread 341 of at least one connecting part 34. In this embodiment, the elastic part 40 may have different thread cross-section geometries in response to the external thread 341 of at least one connecting part 34. For example, when the elastic part 40 is an ISO metric thread (60° V-profile), it means that the thread cross-section of the elastic part 40 is triangular, that is, it is composed of symmetrical V-shaped threads, and in the plane of the thread axis, the side surfaces of the V-shaped threads form an angle of 60° with each other. For example, when the cross-sectional shape of the thread of the elastic part 40 is a trapezoid, it means that the elastic part 40 is a trapezoidal thread, which has the characteristics of strong bearing capacity and is suitable for transmission. For example, when the cross-sectional shape of the thread of the elastic part 40 is square, it means that the elastic part 40 is a square thread, which is characterized by high efficiency and low friction. When the cross-sectional shape of the thread of the elastic part 40 is a thickened trapezoid, it means that the elastic part 40 is an Acme thread with high strength, which is suitable for repeated actuation. When the cross-section of the thread of the elastic part 40 is vertical on one side and beveled on the other side, it means that the elastic part 40 is a buttress thread, which has the characteristic of being good at bearing unidirectional loads. The elastic part 40 includes, is not limited to a spring, a flexible arm, or a serpentine tube. Preferably, the elastic part 40 may be made of memory metal. The content of memory metals comprises nickel-titanium-based shape memory alloy (Ni-Ti SMA), copperbased shape memory alloy (Cu SMA), or iron-based shape memory alloy (Fe SMA). More preferably, the content of at least one memory metal strip is selected from the group consisting of gold-cadmium (Au-Cd), silver-cadmium (Ag-Cd), copper-zinc (Cu-Zn), copper-zinc-aluminum (Cu-Zn-Al), copper-zinc-tin (Cu-Zn-Sn), copper-zinc-silicon (Cu-Zn-Si), copper-tin (Cu-Sn), copper-zinc-gallium (Cu- Zn-Ga), indium-titanium (In-Ti), gold-copper-zinc (Au-Cu-Zn), nickel-aluminum (Ni-Al), iron-platinum (Fe-Pt), titanium-nickel (Ti-Ni), titanium-nickel- palladium (Ti-Ni-Pd), titanium-niobium (Ti-Nb), uranium-niobium (U-Nb) and iron-manganese- silicon (Fe-Mn-Si).

[0054] In addition, to enhance the stability of the user when using the present invention for narrow cavity surgery and to prevent loosening due to vibration or repeated movements, the elastic part 40 of the present invention employs a fine pitch thread to reduce the lead angle and increase its anti-reversal ability. Furthermore, the inner diameter of the thread of elastic part 40 is designed to be slightly smaller than the outer diameter of the outer thread of at least one connecting part 34. This design ensures that when the two are screwed together, the elastic part 40 expands slightly, generates radial preload, and forms a friction locking effect to achieve the purpose of "micro self-locking." Therefore, by connecting the elastic part 40 of the present invention with at least one connecting part 34, not only can assembly errors be absorbed, but operation accuracy and stable positioning effects can also be improved, providing the operator with good hand- feel feedback.

[0055] When the number of at least one connecting part 34 is two, the elastic component 40 can be bent and the two ends of the elastic part 40 are respectively connected to the two connecting parts 34, so that the elastic part 40 can provide the effect of scraping or stretching the tissue in a narrow cavity. Since the adjacent angles of at least one connecting part 34 are different, as shown in Fig. 6A, when the two connecting parts 34 are arranged relative to each other and the angle is approximately 180 degrees, the two ends of the elastic part 40 are farther apart after being bent; as shown in Fig. 6B, when the two connecting parts 34 are arranged adjacent to each other and one of the angles is less than 180 degrees, the two ends of the elastic part40 are closer together after being bent. That is to say, when the two connecting parts 34 are disposed opposite to each other and the included angle is about 180 degrees, the elastic part 40 can scrape / stretch the tissue in a larger range. Therefore, the user can select or adjust the positions of two adjacent connecting parts 34 according to needs.

[0056] In one preferred embodiment, as shown in Figs. 3, 5 and 10, the present invention further comprises at least one operating part 50. At least one operating part 50 comprises a handle portion 51 and a bent portion 52, wherein the handle portion 51 is connected to the bent portion 52, and a predetermined angle is between the portion 51 and the bent portion 52 to facilitate adjustable viewing during use. In this embodiment, at least one operating part 50 is detachably connected to the elastic part 40. Preferably, as shown in Fig. 10, at least one operating part 50 further comprises a mirror 53, the mirror 53 is connected to the bent portion 52, that is to say, the bent portion 52 is located between the handle portion 51 and the mirror 53. Alternatively, as shown in Figs. 3 and 11, at least one operating part 50 further comprises a tapered socket 54. The tapered socket 54 is connected to the bent portion 51 ; that is to say, the bent portion 52 is located between the handle portion 51 and the tapered socket 54. The tapered socket 54 is usually connected to a tube 60. The tube 60 can be connected to a suction device, so that the liquid in the chamber (such as blood, tissue fluid, flushing fluid, etc.) can be extracted from the chamber through the tapered socket 54 connected to the tube 60. Specifically, while the number of at least one operating part 50 is one, the bent portion 52 can connect to the mirror 53 (Fig.10) or the tapered socket 54 (Fig.3). While the number of at least one operating part 50 is two, one bent portion 52 of at least one operating part 50 can connect to the mirror 53 (Figs.l 1 and 13) and another one bent portion 52 of at least one operating part 50 can connect to the tapered socket 54. The predetermined angle of the bent portion 52 is adjustable as needed. For example, the mirror 53 of at least one operating part 50 can be rotated along the thread of the elastic part 40 to an angle required by the user. Therefore, the screw connection method provided by the present invention has both stable and detachable characteristics, which is convenient for maintenance and replacement. More preferably, at least one operating part 50 further comprises a T-shape end 55, wherein the T-shaped end 55 is connected to the handle portion 51 at the end opposite to the mirror 53 or the tapered socket 54. The T-shaped end 55 is connected to the handle portion 51. Accordingly, the at least one operating part 50 can be screwed into the elastic part 40 to a depth limited by the T-shaped end 55, and an additional stop function is provided to prevent the at least one operating part 50 from loosening or sliding during operation.

[0057] More preferably, the handle portion 51 and the bent portion 52 of at least one operating part 50 may be made of memory metal. The content of memory metals comprises nickeltitanium-based shape memory alloy (Ni-Ti SMA), copper-based shape memory alloy (Cu SMA), or iron-based shape memory alloy (Fe SMA). More preferably, the content of at least one memory metal strip is selected from the group consisting of gold-cadmium (Au-Cd), silvercadmium (Ag-Cd), copper-zinc (Cu-Zn), copper-zinc-aluminum (Cu-Zn-Al), copper-zinc-tin (Cu-Zn-Sn), copper-zinc-silicon (Cu-Zn-Si), copper-tin (Cu-Sn), copper-zinc-gallium (Cu- Zn- Ga), indium-titanium (In-Ti), gold-copper-zinc (Au-Cu-Zn), nickel-aluminum (Ni-Al), ironplatinum (Fe-Pt), titanium-nickel (Ti-Ni), titanium-nickel-palladium (Ti-Ni-Pd), titaniumniobium (Ti-Nb), uranium-niobium (U-Nb) and iron-manganese-silicon (Fe-Mn-Si).

[0058] In one embodiment, as shown in Figs. 11 and 12, when the present invention is applied to remove liquid (such as blood, tissue fluid, flushing fluid, etc.) from a chamber, the angle between the handle portion 51 and the bent portion 52 of at least one operating part 50 with the tapered socket 54 is adjusted to be less than 90 degrees (the handle portion 51 and the bent portion 52 of at least one operating part 50 with the mirror 53 is also adjusted to be less than 90 degrees), and the suction port of the suction provided in the tapered socket 54 is located behind the mirror 53 of the at least one operating part 50, so that the liquid around the mirror 53 of the at least one operating part 50 can be immediately removed to keep the mirror 53 surface clear. The T-shaped end 55 of the at least one operating part 50 provides stabilization, i.e. by means of the T-shaped end 55 it is possible to increase the stability of the at least one operating part 50 when it is rotationally moved along the threads in the elastic member. In other words, the T-shaped end 55 can facilitate adjusting and micro-fixing the viewing angle during use.

[0059] In another embodiment, as shown in Figs. 13 and 14, the angle between the handle portion 51 and the bent portion 52 of at least one operating part 50 with the tapered socket 54 is adjusted to be greater than 90 degrees (the handle portion 51 and the bent portion 52 of at least one operating part 50 with the mirror 53 is still adjusted to be less than 90 degrees). When the instrument kit with an elastic part 40 of the present invention is applied to the visual environment of a cleaning chamber, the tube 60 with the suction is connected with the tapered socket of the at least one operating part 50 (the main purpose of the suction is to absorb or suck the water sprayed from the front end of the universal joint 30), so that the suction port of the suction provided in the tapered socket 54 is located between the mirror 53 of the at least one operating part 50 and the universal joint 30, thereby achieving the effect of instantly sucking out the water mist and avoiding obstruction of the visual line.

[0060] Various modifications to these embodiments will be readily apparent to those skilled in the art, and the novel principles and subject matter disclosed herein may be applied to other embodiments without the use of the innovative faculty. The claimed subject matter set forth in the claims is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. It is contemplated that additional embodiments are within the spirit and true scope of the disclosed subject matter. Thus, it is intended that the present disclosure covers modifications and variations that come within the scope of the appended claims and their equivalents. While the disclosure has been described with respect to a limited number of embodiments, those skilled in the art, having the benefit of this disclosure, will appreciate that other embodiments can be advised and achieved which do not depart from the scope of the description as disclosed herein. Furthermore, the embodiments disclosed in the present invention are not limited to the field of surgical instruments shown herein. That is, the instruments disclosed herein may be made to be used in any application for confined space implementation and use.

Claims

WHAT IS CLAIMED IS:

1. An instrument for intracavity surgery, comprising: a universal joint comprising at least one connecting part with external threads; and an elastic part threadedly and detachably engaged with the external threads of at least one connecting part of the universal joint.

2. The instrument of claim 1 , wherein the universal joint further comprises a half-ball head, a base, and an opening, wherein the half-ball head is located relative to the base; and the opening is adjacent to the base.

3. The instrument of claim 2, wherein the elastic part comprises a spring, a flexible arm, or a serpentine tube.

4. The instrument of claim 3, wherein the elastic part is made of memory metal, and the content of memory metals comprises nickel-titanium-based shape memory alloy (Ni-Ti SMA), copper-based shape memory alloy (Cu SMA), or iron-based shape memory alloy (Fe SMA).

5. The instrument of claim 4, wherein the content of at least one memory metal strip is selected from the group consisting of gold-cadmium (Au-Cd), silver-cadmium (Ag-Cd), copperzinc (Cu-Zn), copper-zinc-aluminum (Cu-Zn-Al), copper-zinc-tin (Cu-Zn-Sn), copper-zinc- silicon (Cu-Zn-Si), copper-tin (Cu-Sn), copper-zinc-gallium (Cu- Zn-Ga), indium-titanium (In- Ti), gold-copper-zinc (Au-Cu-Zn), nickel-aluminum (Ni-Al), iron-platinum (Fe-Pt), titaniumnickel (Ti-Ni), titanium-nickel-palladium (Ti-Ni-Pd), titanium-niobium (Ti-Nb), uraniumniobium (U-Nb) and iron-manganese-silicon (Fe-Mn-Si).

6. The instrument of claim 5, wherein the number of at least one connecting part is one.

7. The instrument of claim 5, wherein the number of at least one connecting part is two, and these two connecting parts are adjacent to each other, and the angle between the two connecting parts is about 180 degrees; the two ends of the elastic part are respectively connected to the two connecting parts.

8. The instrument of claim 5, wherein the number of at least one connecting part is two, and these two connecting parts are adjacent to each other, the angle between the two connecting parts is less than 180 degrees; the two ends of the elastic part are respectively connected to the two connecting parts.

9. The instrument of claim 5, wherein the universal joint further comprises at least three flow guide elements arranged annularly and equally on the inner wall surface of the base.

10. The instrument of claim 9, wherein each flow guide element extends in an arc shape and extends from the inner wall surface toward the direction of the opening to form a flow guide slope; a high end of the flow guide slope faces the inner wall surface of the base, and a low end of the flow guide slope faces the opening.

11. The instrument of claim 10, wherein the bottoms of each guide element extend toward each other to form a guide groove, and each guide groove is perpendicular to the axis direction of the half-ball head of the universal joint.

12. The instrument of claim 11, wherein the number of at least three flow guide elements is three, and each of the at least three flow guide elements forms an imaginary straight line extending to the imaginary center, with each imaginary straight line spaced about 120 degrees apart from each other.

13. The instrument of claim 11 , wherein the number of at least three flow guide elements is four, and each of these elements forms an imaginary straight line extending to the imaginary center, with each imaginary straight line spaced about 90 degrees apart from each other.

14. The instrument of claim 11 , wherein the number of at least three flow guide elements is six, each of these elements forms an imaginary straight line extending to the imaginary center, with each imaginary ray spaced about 60 degrees apart from each other.

15. The instrument of claim 11 , wherein at least three flow guide elements further comprise at least two guide extensions formed by extending from the high end of the flow guide slope towards the hall-ball head along the inner wall, and they are oppositely arranged on the inner wall.

16. The instrument of claim 15, wherein the number of flow guide elements is four, and the number of the guide extensions is two, and the two guide extensions are oppositely arranged.

17. The instrument of claim 15, wherein the number of flow guide elements is six, there are the number of guide extensions is four, and the four guide extensions are arranged in pairs.

18. The instrument of claim 11 further comprises at least one operating part detachably connected to the elastic part, wherein at least one operating part comprises a handle portion and a bent portion; the handle portion is connected to the bent portion, and a predetermined angle is between the handle portion and the bent portion.

19. The instrument of claim 18, wherein at least one operating part further comprises a mirror, the mirror is connected to the bent portion, and the bent portion is located between the handle portion and the mirror.

20. The instrument of claim 18, wherein at least one operating part further comprises a tapered socket; the tapered socket is connected to the bent portion, and the bent portion is located between the handle portion and the tapered socket.

21. The instrument of claim 19, wherein at least one operating part further comprises a T- shape end, wherein the T-shaped end is connected to the handle at the end opposite to the mirror.

22. The instrument of claim 20, wherein at least one operating part further comprises a T- shape end, wherein the T-shaped end is connected to the handle at the end opposite to the tapered socket.

23. The instrument of claim 22, wherein at least one operating part is made of memory metal, and the content of memory metals comprises nickel-titanium-based shape memory alloy (Ni-Ti SMA), copper-based shape memory alloy (Cu SMA), or iron-based shape memory alloy (Fe SMA).

24. The instrument of claim 23, wherein the content of at least one memory metal strip is selected from the group consisting of gold-cadmium (Au-Cd), silver-cadmium (Ag-Cd), copperzinc (Cu-Zn), copper-zinc-aluminum (Cu-Zn-Al), copper-zinc-tin (Cu-Zn-Sn), copper-zinc- silicon (Cu-Zn-Si), copper-tin (Cu-Sn), copper-zinc-gallium (Cu- Zn-Ga), indium-titanium (In- Ti), gold-copper-zinc (Au-Cu-Zn), nickel-aluminum (Ni-Al), iron-platinum (Fe-Pt), titaniumnickel (Ti-Ni), titanium-nickel-palladium (Ti-Ni-Pd), titanium-niobium (Ti-Nb), uraniumniobium (U-Nb) and iron-manganese-silicon (Fe-Mn-Si).

25. An instrument kit for intracavity surgery, comprising: a hollow handle, a connecting rod is detachably connected to the hollow handle, a universal joint comprising at least one connecting part with external threads, wherein the universal joint can pivotally joint to the connecting rod for rotating; and, an elastic part threadedly and detachably engaged with the external threads of at least one connecting part of the universal joint.

26. The instrument kit of claim 25, wherein the universal joint further comprises a half-ball head, a base, a neck, and an opening, wherein the half-ball head is located relative to the base; a neck is between the half-ball head and the base, and the opening is adjacent to the base.

27. The instrument kit of claim 26, wherein the connecting rod further has a socket on the side, and a width of the socket is less than the width of the half-ball head of the universal joint, but the width of the socket is fitted to the width of the neck of the universal joint.

28. The instrument kit of claim 27, wherein the elastic part comprises a spring, a flexible arm, or a serpentine tube.

29. The instrument of claim 28, wherein the elastic part is made of memory metal, and the content of memory metals comprises nickel-titanium-based shape memory alloy (Ni-Ti SMA), copper-based shape memory alloy (Cu SMA), or iron-based shape memory alloy (Fe SMA).

30. The instrument kit of claim 29, wherein the content of at least one memory metal strip is selected from the group consisting of gold-cadmium (Au-Cd), silver-cadmium (Ag-Cd), copperzinc (Cu-Zn), copper-zinc-aluminum (Cu-Zn-Al), copper-zinc-tin (Cu-Zn-Sn), copper-zinc- silicon (Cu-Zn-Si), copper-tin (Cu-Sn), copper-zinc-gallium (Cu- Zn-Ga), indium-titanium (In- Ti), gold-copper-zinc (Au-Cu-Zn), nickel-aluminum (Ni-Al), iron-platinum (Fe-Pt), titaniumnickel (Ti-Ni), titanium-nickel-palladium (Ti-Ni-Pd), titanium-niobium (Ti-Nb), uraniumniobium (U-Nb) and iron-manganese-silicon (Fe-Mn-Si).

31. The instrument kit of claim 30, wherein the number of at least one connecting part is one.

32. The instrument kit of claim 30, wherein the number of at least one connecting part is two, and these two connecting parts are adjacent to each other, and the angle between the two connecting parts is about 180 degrees; the two ends of the elastic part are respectively connected to the two connecting parts.

33. The instrument kit of claim 30, wherein the two connecting parts are arranged opposite to each other, and the angle between the two connecting parts is less than 180 degrees; the two ends of the elastic part are respectively connected to the two connecting parts.

34. The instrument kit of claim 30, wherein the universal joint further comprises at least three flow guide elements arranged annularly and equally on the inner wall surface of the base.

35. The instrument kit of claim 34, wherein each flow guide element extends in an arc shape and extends from the inner wall surface toward the direction of the opening to form a flow guide slope; a high end of the flow guide slope faces the inner wall surface of the base, and a low end of the flow guide slope faces the opening.

36. The instrument kit of claim 35, wherein the bottoms of each guide element extend toward each other to form a guide groove, and each guide groove is perpendicular to the axis direction of the half-ball head of the universal joint.

37. The instrument kit of claim 36, wherein the number of at least three flow guide elements is three, and each of the at least three flow guide elements forms an imaginary straight line extending to the imaginary center, with each imaginary straight line spaced about 120 degrees apart from each other.

38. The instrument kit of claim 36, wherein the number of at least three flow guide elements is four, and each of these elements forms an imaginary straight line extending to the imaginary center, with each imaginary straight line spaced about 90 degrees apart from each other.

39. The instrument kit of claim 36, wherein the number of at least three flow guide elements is six, each of these elements forms an imaginary straight line extending to the imaginary center, with each imaginary ray spaced about 60 degrees apart from each other.

40. The instrument kit of claim 36, wherein at least three flow guide elements further comprise at least two guide extensions formed by extending from the high end of the flow guide slope towards the hall-ball head along the inner wall, and they are oppositely arranged on the inner wall.

41. The instrument kit of claim 40, wherein the number of flow guide elements is four, and the number of the guide extensions is two, and the two guide extensions are oppositely arranged.

42. The instrument kit of claim 40, wherein the number of flow guide elements is six, there are the number of guide extensions is four, and the four guide extensions are arranged in pairs.

43. The instrument kit of claim 36 further comprises at least one operating part detachably connected to the elastic part, wherein the at least one operating part comprises and a bent portion; the handle portion is connected to the bent portion, and a predetermined angle is between the handle portion and the bent portion.

44. The instrument kit of claim 43, wherein at least one operating part further comprises a mirror, the mirror is connected to the bent portion, and the bent portion is located between the handle portion and the mirror.

45. The instrument kit of claim 43, wherein at least one operating part further comprises a tapered socket; the tapered socket is connected to the bent portion, and the bent portion is located between the handle portion and the tapered socket.

46. The instrument kit of claim 44, wherein at least one operating part further comprises a T- shape end, wherein the T-shaped end is connected to the handle at the end opposite to the mirror.

47. The instrument kit of claim 45, wherein at least one operating part further comprises a T- shape end, wherein the T-shaped end is connected to the handle at the end opposite to the tapered socket.

48. The instrument kit of claim 30, wherein at least one operating part is made of memory metal, and the content of memory metals comprises nickel-titanium-based shape memory alloy (Ni-Ti SMA), copper-based shape memory alloy (Cu SMA), or iron-based shape memory alloy (Fe SMA).

49. The instrument kit of claim 48, wherein the content of at least one memory metal strip is selected from the group consisting of gold-cadmium (Au-Cd), silver-cadmium (Ag-Cd), copperzinc (Cu-Zn), copper-zinc-aluminum (Cu-Zn-Al), copper-zinc-tin (Cu-Zn-Sn), copper-zinc- silicon (Cu-Zn-Si), copper-tin (Cu-Sn), copper-zinc-gallium (Cu- Zn-Ga), indium-titanium (In- Ti), gold-copper-zinc (Au-Cu-Zn), nickel-aluminum (Ni-Al), iron-platinum (Fe-Pt), titaniumnickel (Ti-Ni), titanium-nickel-palladium (Ti-Ni-Pd), titanium-niobium (Ti-Nb), uraniumniobium (U-Nb) and iron-manganese-silicon (Fe-Mn-Si).

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