Ultrasonic surgical handle connecting mechanism and ultrasonic surgical handle

Abstract

The utility model provides an ultrasonic surgical handle connecting mechanism and an ultrasonic surgical handle, and the ultrasonic surgical handle connecting mechanism comprises a connector, a sliding part, a clamping jaw and a guide limiting part, the clamping jaw is pivotally connected to the side face of the mounting base through a lug on the side face of the mounting base, the length of the front portion of the clamping jaw is larger than that of the mounting base, the clamping jaw is provided with a bent head, and the clamping jaw can move along with the connector; one part of the guide limiting piece is slidably connected to the outer side of the clamping jaw in a sleeving mode, the other part of the guide limiting piece can be slidably connected to the outer side of the mounting base in a sleeving mode, and the clamping jaw pivots under the action of the guide limiting piece while the connector slides front and back; and the front part of the clamping jaw is in an open state and is released outside the guide limiting piece or is in a closed state and is accommodated in the guide limiting piece and moves for a certain distance along with the connector. By the adoption of the technical scheme, the convenience degree of disassembly and assembly of the tool bit assembly is improved, resource waste is reduced, and the environmental protection degree is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of surgical medical equipment more specifically, relate to a kind of ultrasonic surgical handle connecting mechanism and ultrasonic surgical handle. BACKGROUND

[0002] As a surgical equipment using ultrasonic energy, ultrasonic surgical instrument is used in various endoscopic surgery and conventional surgery, mainly for the hemostatic separation of soft tissue and tissue coagulation. With the popularity of minimally invasive surgery, ultrasonic surgical instrument has become a conventional surgical instrument and is widely used.

[0003] Most of the ultrasonic surgical instruments commonly used in hospitals are welded together with ultrasonic handles and blade assemblies. It is found in actual use that this design has two major problems: first, the ultrasonic handle and the blade assembly that needs to be replaced frequently are fixed together, resulting in the blade assembly being discarded together with the ultrasonic handle after being worn out, wasting parts that can still be used; second, the entire instrument needs to be sterilized after each operation, but high temperature and high pressure processing will accelerate the aging of the equipment, wasting resources and polluting the environment, which is completely contrary to the concept of environmental protection advocated today. SUMMARY

[0004] The utility model aims at providing an ultrasonic surgical handle connecting mechanism and an ultrasonic surgical handle to solve the technical problems of resource waste and low environmental protection caused by the inconvenience of replacing the blade assembly of the ultrasonic surgical instrument in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0006] In the first aspect, an ultrasonic surgical handle connecting mechanism includes a connector, a sliding member, a clamping jaw, and a guide limiting member, wherein

[0007] The connector is a sleeve-shaped connecting structure, the front part of the connector has a mounting seat, the rear part of the connector is a sleeve, and the rear end of the sleeve is provided with a fastener, one or more wave springs are further arranged between the fastener and the sleeve part;

[0008] The sliding member has a flange with an inner hole and a circular tube extending along the axis of the connector from the outer diameter of the flange, the flange can be fixed on the sleeve of the connector, and the circular tube can partially or completely cover the one or more wave springs;

[0009] The clamping jaw is pivotally connected to the side of the mounting seat through the lug of the side of the mounting seat, the length of the front part of the clamping jaw is greater than the length of the mounting seat, the clamping jaw has a bent head, and the clamping jaw can move together with the connector;

[0010] Part of the guide limiting piece is sleeved on the outside of the clamping jaw, and another part of the guide limiting piece can be sleeved on the outside of the mounting seat. The connector can slide forward and backward relative to the guide limiting piece. When the connector slides forward and backward, the clamping jaw pivots under the action of the guide limiting piece, so that the front part of the clamping jaw is in an open state and is released outside the guide limiting piece or is in a closed state and is accommodated in the guide limiting piece and moves a distance with the connector.

[0011] By adopting the above technical scheme, the ultrasonic surgical handle connecting mechanism can realize detachable connection with the blade head assembly. The connector of the ultrasonic surgical handle connecting mechanism moves forward to release the blade head assembly, thereby realizing disassembly of the blade head assembly. The connector moves backward to clamp and fix the blade head assembly. In this way, the convenience degree of disassembly of the blade head assembly is greatly improved. In addition, the clamping jaw of the ultrasonic surgical handle connecting mechanism fixes the blade head assembly by clamping, so that the blade head assembly is not easy to fall off, and the firmness of the blade head assembly when fixed is improved.

[0012] In one embodiment, a torsional spring is further arranged between the mounting seat and the clamping jaw. The rear part of the clamping jaw has two extended legs connected to the mounting seat. The torsional spring is sleeved on a pin penetrating through the two legs. One torsional arm of the torsional spring elastically abuts against the mounting seat, and the other torsional arm of the torsional spring elastically abuts against the clamping jaw.

[0013] In one embodiment, the guide limiting piece is provided with a slope corresponding to the clamping jaw in sliding cooperation. The slope gradually inclines towards the blade head assembly along the mounting direction of the blade head assembly. The clamping jaw is also provided with a slope. The slope of the clamping jaw is oppositely arranged with the slope of the guide limiting piece and can limit the opening angle of the clamping jaw together with the slope of the guide limiting piece in the released state of the clamping jaw.

[0014] In one embodiment, the number of the clamping jaws is 2, 3 or 4, and the number of the torsional springs is consistent with the number of the clamping jaws.

[0015] In one embodiment, the guide limiting piece is provided with a guide groove, and the mounting seat is provided with a guide protrusion in sliding cooperation with the guide groove. The groove length direction of the guide groove is parallel to the axis of the connector, and the guide protrusion can slide forward and backward in the guide groove along the groove length direction of the guide groove.

[0016] In one embodiment, the guide limiting piece includes at least one guide groove, and the number of the guide protrusions is consistent with the number of the guide grooves.

[0017] In one embodiment, the center line of the guide protrusion is perpendicular to the center line of symmetry of the clamping jaw.

[0018] In one embodiment, the number of the clamping jaws is two, and the number of the guide protrusions is two, wherein the two clamping jaws are arranged on a pair of opposite sides of a rectangle, and the two guide protrusions are arranged on another pair of opposite sides of the rectangle.

[0019] In one embodiment, an arc-shaped surface is arranged at the center of the bent head of the clamping jaw.

[0020] In a second aspect, an ultrasonic surgical handle is provided, comprising the ultrasonic surgical handle connecting mechanism as described above.

[0021] By adopting the technical scheme described above, on the basis of the advantages of the ultrasonic surgical handle connecting mechanism in the above embodiments, the ultrasonic surgical handle in the present embodiment also has the advantage of convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0023] Figure 1 is a perspective view of the ultrasonic surgical handle and the ultrasonic knife head assembly provided by the embodiments of the present application.

[0024] Figure 2 is a perspective view of the ultrasonic surgical handle and the ultrasonic knife head assembly provided by the embodiments of the present application, wherein part of the handle shell of the ultrasonic surgical handle is hidden.

[0025] Figure 3 is a perspective view of the ultrasonic surgical handle connecting mechanism provided by the embodiments of the present application.

[0026] Figure 4 is an exploded view of the ultrasonic surgical handle connecting mechanism provided by the embodiments of the present application.

[0027] Figure 5 is a perspective view of the connector provided by the embodiments of the present application.

[0028] Figure 6 is a perspective view of the torsional spring provided by the embodiments of the present application.

[0029] Figure 7 is a perspective view of the clamping jaw provided by the embodiments of the present application.

[0030] Figure 8 is a perspective view of a guide limiting piece provided by the embodiment of the utility model.

[0031] The reference signs in the drawings are as follows:

[0032] 100, ultrasonic surgical handle; 200, knife head assembly; 300, ultrasonic surgical handle connecting mechanism;

[0033] 102, guide limiting piece;

[0034] 1021, inclined surface; 1022, guide groove;

[0035] 204, flange piece;

[0036] 301, connector; 302, mounting seat; 303, clamping jaw; 304, torsional spring; 305, supporting leg; 306, fastener; 307, pin;

[0037] 3021, lug; 3022, guide protrusion; 3031, arc surface; 3032, inclined surface; 3041, torsional arm;

[0038] 401, sliding piece; 406, wave spring;

[0039] 4011, flange; 4012, circular tube. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical schemes and beneficial effects to be solved by the utility model more clearly understood, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected or indirectly connected to the other element.

[0042] It should be understood that, in order to facilitate the description of the relative position relationship of each component in the ultrasonic surgical instrument, the above and below descriptions about the front and back directions are all defined with reference to the direction observed by the operator when holding the ultrasonic surgical knife to operate, wherein the position of the ultrasonic surgical instrument acting on the surgical site is front, and the position of the ultrasonic surgical instrument close to the human body is back.

[0043] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purposes and cannot be understood as indicating relative importance or indicating the number of technical features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise explicitly and specifically limited. The specific implementation of the utility model will be described in more detail below in combination with specific embodiments.

[0044] As shown in Figure 1 and Figure 2 , the utility model embodiment provides a kind of ultrasonic surgical handle connecting mechanism 300, for connecting tool head assembly 200;Please see Figure 3 and Figure 4 , ultrasonic surgical handle connecting mechanism 300 includes connector 301, sliding piece 401, clamp jaw 303, guide limiting piece 102, wherein,

[0045] Connector 301 is sleeve-like connecting structure, the front portion of connector 301 has mounting seat 302, the rear portion of connector 301 is sleeve 3011 and the rear end portion of sleeve 3011 is provided with fastener 306, and one or more wave springs 406 are also provided between fastener 306 and sleeve 3011;

[0046] Sliding piece 401 has flange 4011 with hole and circular tube 4012 extending along the axis of connector 301 from the outer diameter of flange 4011, flange 4011 can be fixed on sleeve 3011 of connector 301, and circular tube 4012 can partially or totally cover one or more wave springs 406;

[0047] Clamp jaw 303 is pivotally connected to the side of mounting seat 302 by lug 3021 of the side of mounting seat 302, the length of the front part of clamp jaw 303 is greater than the length of mounting seat 302, clamp jaw 303 has bent head, and clamp jaw 303 can move together with connector 301;

[0048] Part of guide limiting piece 102 is slidably sleeved on the outside of clamp jaw 303, and another part of guide limiting piece 102 can be slidably sleeved on the outside of mounting seat 302, connector 301 can slide forward and backward relative to guide limiting piece 102, clamp jaw 303 is pivoted under the action of guide limiting piece 102 while connector 301 slides forward and backward, so that the front part of clamp jaw 303 is in open state and released outside guide limiting piece 102 or in closed state and received in guide limiting piece 102 and moves a certain distance together with connector 301.

[0049] Specifically, the connector 301 has a channel that penetrates the connector 301 along the front-rear direction of the connector 301, in the drawings, the X direction is the front direction of the connector 301, and the Y direction is the rear direction of the connector 301, and the front part of the connector 301 has a mounting seat 302, here, it can be understood that the front part refers to the part of the mounting seat 302 close to the tool bit assembly 200.

[0050] The sliding member 401 refers to a member for driving the connector 301 to slide; the sliding member 401 has a flange 4011 and a circular tube 4012, wherein the flange 4011 is provided with an inner hole, the shape and size of the inner hole match the sleeve 3011 of the connector 301, so that the flange 4011 can be fixed on the sleeve 3011 of the connector 301, and the circular tube 4012 extends along the axis of the connector 301 from the outer diameter of the flange 4011, so that the circular tube 4012 can partially or completely cover one or more wave springs 406.

[0051] It can be understood that the shape of the mounting seat 302 includes but is not limited to a substantially rectangular shape, and the mounting seat 302 can have a substantially rectangular or circular shape, etc., and the mounting seat 302 is used for sliding fit with the guide limiting member 102, so that the shape of the mounting seat 302 is suitable for the shape of the guide limiting member 102, so that the two can be slidably fitted with each other.

[0052] The side surface of the mounting seat 302 is provided with a lug 3021, and the clamping jaw 303 is pivotably connected to the side surface of the mounting seat 302 through the lug 3021, that is, the clamping jaw 303 is connected to the mounting seat 302 in an axis, and the clamping jaw 303 can rotate around the axis relative to the mounting seat 302, and the length of the front part of the clamping jaw 303 is greater than the length of the mounting seat 302, so that the front part of the clamping jaw 303 can be exposed outside the mounting seat 302, that is, the front part of the clamping jaw 303 protrudes from the front end of the mounting seat 302; which is conducive to the clamping jaw 303 to realize clamping the tool bit assembly 200.

[0053] The guide limiting member 102 refers to a member for guiding the sliding direction of the connector 301 and limiting the position of the clamping jaw 303 so that the clamping jaw 303 performs a releasing action or a receiving action, and the guide limiting member 102 is fixed to the handle housing 101.

[0054] It can be understood that the connector 301 can slide forward and backward relative to the guide limiting member 102, that is, when the connector 301 moves a certain displacement forward relative to the guide limiting member 102, the front part of the clamping jaw 303 is in an open state and is released outside the guide limiting member 102; and when the connector 301 moves a certain displacement backward relative to the guide limiting member 102, the front part of the clamping jaw 303 is in a closed state and is received in the guide limiting member 102, and can also move a certain distance with the connector 301;

[0055] The working principle of the ultrasonic surgical handle connecting mechanism provided by the embodiment is as follows:

[0056] The blade head assembly 200 is detachably connected with the ultrasonic surgical handle connecting mechanism 300, the connector 301 of the ultrasonic surgical handle connecting mechanism 300 can move forward and backward relative to the guide limiting piece 102, when the connector 301 moves forward relative to the guide limiting piece 102, the clamping jaw 303 on the connector 301 pivots, the front part of the clamping jaw 303 is in an open state and is released outside the guide limiting piece 102, the clamping jaw 303 releases the blade head assembly 200, and the two can be separated; when the connector 301 moves backward relative to the guide limiting piece 102, the clamping jaw 303 on the connector 301 pivots, the front part of the clamping jaw 303 is in a closed state, in this way, the blade head assembly 200 can be accommodated in the guide limiting piece 102 and can accommodate the head part of the clamping jaw 303, so that the blade head assembly 200 is connected with the ultrasonic surgical handle connecting mechanism, in addition, the sliding piece 401 can drive the connector 301 to move a certain distance synchronously with the guide limiting piece 102 under the operation of the doctor, so as to realize the surgical action of the blade head assembly 200.

[0057] By adopting the above technical scheme, the ultrasonic surgical handle connecting mechanism 300 can realize detachable connection with the blade head assembly 200, the connector 301 of the ultrasonic surgical handle connecting mechanism 300 can release the blade head assembly 200 by moving forward, so as to realize disassembly of the blade head assembly 200, the connector 301 can clamp and fix the blade head assembly 200 by moving backward, in this way, the convenience degree of disassembly of the blade head assembly 200 is greatly improved; in addition, the clamping jaw 303 of the ultrasonic surgical handle connecting mechanism 300 fixes the blade head assembly 200 by clamping, so that the blade head assembly 200 is not easy to fall off, and the firmness of the blade head assembly 200 when being fixed is improved.

[0058] In addition, the connecting assembly 300 in the ultrasonic surgical handle 100 realizes stable and reliable connection between the blade head assembly 200 and the ultrasonic surgical handle 100, which makes the installation of the blade head assembly 200 convenient and simple to operate, and the tool does not shake during the surgical operation, and the operation is more accurate.

[0059] Please refer to Figures 5 to 7 In one embodiment, the ultrasonic surgical handle connecting mechanism 300 further comprises a torsional spring 304 arranged between the mounting seat 302 and the clamping jaw 303, the rear part of the clamping jaw 303 has two extended connecting legs 305 connected with the mounting seat 302, the torsional spring 304 is sleeved on a pin penetrating through the two connecting legs 305, one torsional arm 3041 of the torsional spring 304 elastically abuts against the mounting seat 302, and the other torsional arm 3041 of the torsional spring 304 elastically abuts against the clamping jaw 303.

[0060] Here, it can be understood that the torsion spring 304 refers to an elastic member that provides the opening elastic force of the clamping jaw 303, and the torsion spring 304 causes the clamping jaw 303 to open and thus the front part of the clamping jaw 303 to be in an open state.

[0061] The torsion spring 304 is arranged between the mounting seat 302 and the clamping jaw 303, the rear part of the clamping jaw 303 has a supporting leg 305 that extends out and is connected to the mounting seat 302, and a pin is connected between the two supporting legs 305.

[0062] The torsion spring 304 is sleeved on the pin, and the torsion spring 304 has two torsion arms 3041, one of which elastically abuts against the mounting seat 302, and the other of which elastically abuts against the clamping jaw 303, so that when the connector 301 drives the clamping jaw 303 of the mounting seat 302 to move forward, the guiding and limiting member 102 releases the clamping jaw 303, and the elastic force of the torsion spring 304 causes the front part of the clamping jaw 303 to be in an open state, which is beneficial to the clamping of the flange member 204 by the clamping jaw 303, thereby realizing the fixed connection of the tool head assembly 200.

[0063] By adopting the above technical solution, the torsion spring 304 provides the elastic force of the clamping jaw 303, so that the clamping jaw 303 can be in an open state under the elastic force, which is beneficial to the fixed connection of the tool head assembly 200.

[0064] Please refer to Figure 8 In one embodiment, the guiding and limiting member 102 is provided with a slope 1021 that slidingly cooperates with the clamping jaw 303, and the slope 1021 gradually inclines toward the direction close to the tool head assembly 200 along the mounting direction of the tool head assembly 200; in other embodiments, the clamping jaw 303 is also provided with a slope 3032, and the slope 3032 of the clamping jaw 303 is oppositely arranged with the slope 1021 of the guiding and limiting member 102 and can limit the opening angle of the clamping jaw 303 together with the slope 1021 of the guiding and limiting member 102 in the state that the clamping jaw 303 is released.

[0065] Here, it can be understood that the slope 1021 of the guiding and limiting member 102 is a surface of the guiding and limiting member 102 for slidingly cooperating with the clamping jaw 303, and the number of the slope 1021 of the guiding and limiting member 102 corresponds to the number of the clamping jaw 303. For example, the number of the clamping jaw 303 is two, and the two clamping jaws 303 are oppositely arranged, so that the number of the slope 1021 of the guiding and limiting member 102 is also two, and the two slopes 1021 of the guiding and limiting member 102 are oppositely arranged, and the distance between the two slopes 1021 of the guiding and limiting member 102 gradually decreases from the front part of the guiding and limiting member 102 to the rear part of the guiding and limiting member 102, so that the two slopes 1021 of the guiding and limiting member 102 are obliquely arranged, which is beneficial to the guiding of the clamping jaw 303 by the slope 1021 of the guiding and limiting member 102.

[0066] Similarly, the inclined surface 3032 of the clamping jaw 303 refers to the surface of the clamping jaw 303 for sliding fit with the guide limiting piece 102, and the inclined surface 3032 of the clamping jaw 303 is also inclinedly matched with the inclined surface 1021 of the guide limiting piece 102, so that the opening angle of the clamping jaw 303 can be limited when the two are slidingly fitted.

[0067] By adopting the above technical scheme, the clamping jaw 303 can be switched between the closed state and the open state, facilitating clamping and taking out of the tool bit assembly 200. In addition, the inner tube 202 can be clamped and moved together with the inner tube 202 by rotating the trigger 403 by a small displacement, improving the operation efficiency and shortening the operation time.

[0068] In an embodiment, the number of clamping jaws 303 is 2, 3 or 4, and the number of torsional springs 304 is consistent with the number of clamping jaws 303.

[0069] By adopting the above technical scheme, the number of clamping jaws 303 can be increased to improve the stability of clamping the tool bit assembly 200.

[0070] In an embodiment, the guide limiting piece 102 is provided with a guide groove 1022, and the mounting seat 302 is provided with a guide protrusion 3022 slidingly fitted with the guide groove 1022, the groove length direction of the guide groove 1022 is parallel to the axis of the connector 301, and the guide protrusion 3022 can slide forward and backward along the groove length direction of the guide groove 1022 in the guide groove 1022.

[0071] By adopting the above technical scheme, the sliding fit of the guide groove 1022 and the guide protrusion 3022 enables the connector 301 to slide forward and backward along its own axis, so that the stability of the connector 301 is higher when sliding. The number of guide protrusions 3022 can be determined according to specific needs. In the embodiment, the number of guide protrusions 3022 is 2 and is symmetrically distributed around the axis of the mounting seat 302. In other embodiments, the number of guide protrusions 3022 is 1 or 3 or more and is symmetrically distributed around the axis of the mounting seat 302.

[0072] In an embodiment, the guide limiting piece 102 includes at least one guide groove 1022, and the number of guide protrusions 3022 is consistent with the number of guide grooves 1022.

[0073] By adopting the above technical scheme, the guide protrusion 3022 corresponds to the guide groove 1022, which is beneficial to improve the stability of the connector 301 when sliding.

[0074] In an embodiment, the center line of the guide protrusion 3022 is perpendicular to the center line of symmetry of the clamping jaw 303.

[0075] By adopting the technical scheme, the guide protrusions 3022 and the clamping jaws 303 are arranged uniformly along the circumference, and the stability of the connector 301 during sliding is further improved.

[0076] In one embodiment, the number of the clamping jaws 303 is 2, and the number of the guide protrusions 3022 is 2, wherein the two clamping jaws 303 are arranged on a pair of opposite sides of the rectangle, and the two guide protrusions 3022 are arranged on another pair of opposite sides of the rectangle.

[0077] By adopting the technical scheme, the guide protrusions 3022 and the clamping jaws 303 are arranged in a central symmetry of the rectangle, which is beneficial to improving the uniformity of the arrangement of the guide protrusions 3022 and the clamping jaws 303, and further beneficial to improving the stability of the connector 301 during sliding.

[0078] In one embodiment, an arc surface 3031 is arranged at the center of the bent head of the clamping jaw 303.

[0079] By adopting the technical scheme, the shape and size of the arc surface 3031 are matched with the shape and size of the flange 204 of the tool head assembly 200, so that the contact area between the clamping jaw 303 and the arc surface 3031 is larger when clamping, and the firmness of the clamping jaw 303 during clamping is improved.

[0080] In a second aspect, an ultrasonic surgical handle 100 is provided, which comprises the ultrasonic surgical handle connecting mechanism 300 as described above.

[0081] By adopting the technical scheme, on the basis of the advantages of the ultrasonic surgical handle connecting mechanism 300 in the above embodiments, the ultrasonic surgical handle in the present embodiment also has the advantage of convenient operation.

[0082] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An ultrasonic surgical handpiece coupling mechanism, comprising: The connector is a sleeve-shaped connecting structure, the front part of the connector has a mounting seat, the rear part of the connector is a sleeve, and the rear end of the sleeve is provided with a fastener, and one or more wave springs are further arranged between the fastener and the sleeve. The sliding piece has a flange with an inner hole and a circular tube extending along the axis of the connector from the outer diameter of the flange, the flange can be fixed on the sleeve of the connector, and the circular tube can partially or completely cover the one or more wave springs. The guide limiting piece is partially sleeved on the outside of the jaw, and the other part can be sleeved on the outside of the mounting seat, the connector can slide forward and backward relative to the guide limiting piece, and the jaw is pivoted under the action of the guide limiting piece while the connector slides forward and backward, so that the front part of the jaw is in an open state and is released outside the guide limiting piece or in a closed state and is accommodated in the guide limiting piece and moves a distance with the connector. The guide limiting piece is provided with a slope corresponding to the sliding cooperation of the jaw, and the slope gradually inclines to the direction close to the tool head assembly along the mounting direction of the tool head assembly; and / or the jaw is also provided with a slope, and the slope of the jaw is oppositely arranged with the slope of the guide limiting piece and can limit the opening angle of the jaw together with the slope of the guide limiting piece in the released state of the jaw. The number of the jaw is 2, 3 or 4, and the number of the torsion spring is consistent with the number of the jaw.

2. The ultrasonic surgical handpiece coupling mechanism of claim 1, wherein, The guide limiting piece is provided with a guide groove, the mounting seat is provided with a guide protrusion in sliding cooperation with the guide groove, the groove length direction of the guide groove is parallel to the axis of the connector, and the guide protrusion can slide forward and backward in the guide groove along the groove length direction of the guide groove.

3. The ultrasonic surgical handpiece coupling mechanism of claim 1, wherein, The guide limiting piece includes at least one guide groove, and the number of the guide protrusion is consistent with the number of the guide groove.

4. The ultrasonic surgical handpiece coupling mechanism of claim 2, wherein: The center line of the guide protrusion is perpendicular to the center line of the jaw.

5. The ultrasonic surgical handpiece coupling mechanism of claim 1, wherein, The number of the jaw is 2, and the number of the guide protrusion is 2, wherein the two jaws are arranged on a pair of opposite faces of a rectangle, and the two guide protrusions are arranged on another pair of opposite faces of the rectangle.

6. The ultrasonic surgical handpiece coupling mechanism of claim 5, wherein, The center of the bent head of the jaw is provided with an arc surface.

7. The ultrasonic surgical handpiece coupling mechanism of claim 5, wherein: The ultrasonic surgical handle connecting mechanism comprises the ultrasonic surgical handle connecting mechanism according to any one of claims 1-9.

8. The ultrasonic surgical handpiece coupling mechanism of any of claims 5-7, wherein, ​ 9. The ultrasonic surgical handpiece coupling mechanism of claim 1, wherein, ​ 10. An ultrasonic surgical handpiece, comprising: ​

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