A constant torque structure for ultrasonic knife system

Abstract

The utility model discloses a constant torque structure for an ultrasonic knife system, relates to the field of medical devices, solves the problem that an ultrasonic knife head needs to be connected to a transducer, generally through a threaded connection. At this time, it is necessary to provide the user with an auxiliary tool that can control the tightening torque to prevent accidents such as the ultrasonic knife head falling off and the thread breaking due to torque problems. The utility model comprises a transducer, a test rod of the transducer and an ultrasonic knife, and a constant torque structure for connecting the two is arranged between the transducer and the ultrasonic knife. The constant torque structure of the utility model provides a fixed torque by utilizing the principle of compression deformation of the plane on the friction sleeve, has a simple structure, is easy to install, and has a controllable maximum torque, effectively solving the problem of fixing the ultrasonic knife and the transducer. At the same time, the test rod of the transducer can also be tightened, and the two can be shared to reduce manufacturing costs.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a constant torque structure for an ultrasonic knife system. Background Art

[0002] In the field of minimally invasive surgery, ultrasonic knife systems are widely used. Compared with other minimally invasive surgical instruments such as high-frequency electric knives, their advantages are: less smoke generation, clear surgical field of view, less thermal damage, and the functions of tissue cutting, coagulation and separation, and the cutting and coagulation range can be precisely controlled.

[0003] The ultrasonic knife system is mainly composed of an ultrasonic generator, a transducer, and an ultrasonic knife head.

[0004] The ultrasonic generator provides high-frequency electrical energy, and the transducer converts the high-frequency electrical energy into high-frequency mechanical vibration energy. The high-frequency vibration energy is transmitted to the ultrasonic blade head, and the ultrasonic blade head performs cutting and coagulation functions. Therefore, the ultrasonic blade head needs to be connected to the transducer, generally through a threaded connection. At this time, it is necessary to provide the user with an auxiliary tool that can control the tightening torque to prevent accidents such as the ultrasonic blade head falling off and the thread breaking due to torque problems.

[0005] When the transducer is being developed, its performance parameters need to be tested. At this time, a test rod is needed as an auxiliary tooling. The auxiliary rod is a cylindrical rod with a diameter equal to half the wavelength. It needs to be screwed onto the transducer. The torque of the screw-in needs to be controllable, and a constant torque structure for the ultrasonic knife system needs to be designed. Utility Model Content

[0006] In order to solve the above-mentioned deficiencies in the prior art, the purpose of the present utility model is to provide a constant torque structure for an ultrasonic knife system.

[0007] The technical solution adopted by the utility model to solve the technical problem is: a constant torque structure for an ultrasonic knife system, comprising a transducer, a test rod of the transducer and an ultrasonic knife, wherein a constant torque structure for connecting the transducer and the ultrasonic knife is arranged between the transducer and the ultrasonic knife;

[0008] The constant torque structure includes:

[0009] The friction shaft includes a proximal end and a distal end relative to each other, and further includes:

[0010] A first plane, the first plane is located at the distal end of the friction shaft and has at least one wedge-shaped boss distributed along the circumference of the surface;

[0011] Axial positioning steps are provided in plurality and are located at the proximal end of the friction shaft. The axial positioning steps are subjected to external forces and are in an inwardly contracted state, and are not subjected to external forces and return to a circumferentially distributed state;

[0012] A plurality of rectangular grooves are provided and are located at the proximal end of the friction shaft, and the rectangular grooves and the positioning steps are distributed on the same circumferential surface;

[0013] An active surface, located at the distal end of the friction shaft and used to apply torque to the parts to be tightened;

[0014] The friction sleeve includes a proximal end and a distal end relative to each other, and further includes:

[0015] A second plane, the second plane is located at the far end of the friction sleeve, and the surface of the second plane is axially distributed with a corresponding number of square bosses that are extrusion-fitted with the wedge-shaped bosses;

[0016] The through holes are distributed along the route from the proximal end to the distal end of the friction sleeve and penetrate the friction sleeve, and the through holes are limitedly matched with the proximal end of the friction shaft.

[0017] In at least some embodiments, the wedge-shaped boss includes a wedge-shaped surface and a vertical surface.

[0018] In at least some embodiments, the rectangular wedge surface passes over the square boss when a maximum tightening force is generated.

[0019] In at least some embodiments, the axial positioning step includes a proximal end and a distal end relative to each other, a protrusion is provided on the outer surface of the axial positioning step and is located at the proximal end, and the outer surface of the protrusion is a gradient layer from the proximal end to the distal end of the axial positioning step.

[0020] In at least some embodiments, the through hole includes a proximal end and a distal end relative to each other, and the diameter of the through hole expands at least once from the proximal end to the distal end.

[0021] In at least some embodiments, the through hole includes between the proximal end and the distal end:

[0022] An action surface that cooperates with the raised limit position of the axial positioning step;

[0023] The active surface is located at at least one of the aperture enlargement positions between the proximal end and the distal end of the through hole.

[0024] In at least some embodiments, an ergonomic surface is provided on the outer surface of the friction sleeve.

[0025] Beneficial Effects

[0026] 1. The constant torque structure of the utility model is composed of two parts, which cooperate with each other to achieve constant and controllable maximum torque. The constant torque structure can tighten the ultrasonic knife onto the transducer to achieve lossless energy transmission. At the same time, the test rod of the transducer can also be tightened onto the transducer to achieve testing and calibration of various core performance parameters of the transducer.

[0027] 2. The constant torque structure of the utility model uses the principle of compression deformation of the plane on the friction sleeve to provide a fixed torque. It has a simple structure, is easy to install, and has a controllable maximum torque. It effectively solves the problem of fixing the ultrasonic knife and the transducer. At the same time, it can also tighten the test rod of the transducer. The two can be shared to reduce manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, but are not intended to limit the present disclosure.

[0029] Figure 1 This is a schematic diagram of the connection between the ultrasonic blade and the transducer in the embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of the connection between the test rod and the transducer in the embodiment of the utility model;

[0031] Figure 3 is a schematic diagram of the assembly of the constant torque structure;

[0032] Figure 4 is a schematic diagram of the constant torque structure after assembly;

[0033] Figure 5 is a schematic diagram of the friction shaft;

[0034] Figure 6 This is a schematic diagram of the friction shaft from another perspective;

[0035] Figure 7 It is a partial enlarged schematic diagram of the friction shaft;

[0036] Figure 8 It is a schematic diagram of the friction sleeve.

[0037] The codes in the figure represent the following:

[0038] 1-constant torque structure; 2-ultrasonic blade; 3-transducer; 4-test rod; 11-friction shaft; 12-friction sleeve; 111-wedge-shaped boss; 1111-wedge-shaped surface; 1112-vertical surface; 112-rectangular groove; 113-positioning step; 114-action surface; 115-first plane; 121-square boss; 122-second plane; 123-ergonomic surface; 124-through hole. DETAILED DESCRIPTION

[0039] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0042] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons of ordinary skill in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the patent specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] In the embodiments of the present disclosure, the term "proximal end" refers to a side close to an operator, "distal end" refers to a side away from an operator, and "plurality" refers to two or more.

[0044] like Figure 1 As shown, according to an embodiment of the present disclosure, a constant torque structure for an ultrasonic knife system is provided, comprising a transducer, a test rod of the transducer, and an ultrasonic knife, wherein a constant torque structure for connecting the transducer and the ultrasonic knife is provided between the transducer and the ultrasonic knife;

[0045] The constant torque structure includes:

[0046] The friction shaft includes a proximal end and a distal end relative to each other, and further includes:

[0047] A first plane, the first plane is located at the distal end of the friction shaft and has at least one wedge-shaped boss distributed along the circumference of the surface;

[0048] Axial positioning steps are provided in plurality and are located at the proximal end of the friction shaft. The axial positioning steps are subjected to external forces and are in an inwardly contracted state, and are not subjected to external forces and return to a circumferentially distributed state;

[0049] A plurality of rectangular grooves are provided and are located at the proximal end of the friction shaft, wherein the rectangular grooves and the positioning steps are distributed on the same circumferential surface and are adjacent to each other;

[0050] An active surface, located at the distal end of the friction shaft and used to apply torque to the parts to be tightened;

[0051] The friction sleeve includes a proximal end and a distal end relative to each other, and further includes:

[0052] A second plane, the second plane is located at the far end of the friction sleeve, and the surface of the second plane is axially distributed with a corresponding number of square bosses that are extrusion-fitted with the wedge-shaped bosses;

[0053] The through holes are distributed along the route from the proximal end to the distal end of the friction sleeve and penetrate the friction sleeve, and the through holes are limitedly matched with the proximal end of the friction shaft.

[0054] The constant torque structure 1 can tighten the ultrasonic knife 2 onto the transducer 3 to achieve lossless transmission of energy. At the same time, the test rod 4 of the transducer 3 can also be tightened onto the transducer to achieve testing and calibration of the core performance parameters of the transducer.

[0055] According to the embodiment of the present disclosure, Figure 3 As shown, the constant torque structure consists of two parts, a friction shaft 11 and a friction sleeve 12 .

[0056] According to the embodiment of the present disclosure, Figure 5 , Figure 6 and Figure 7 As shown, a certain number of wedge-shaped bosses 111 are evenly distributed along the circumferential direction on a plane 115 of the friction shaft 11. The wedge-shaped boss 111 includes a wedge-shaped surface 1111 and a vertical surface 1112. Four rectangular grooves 112 are evenly distributed along the circumferential direction, and are used to deform inward when the friction shaft 11 is installed in the through hole 124 of the friction sleeve 12, so that the friction shaft 11 can smoothly pass through the through hole of the friction sleeve 12. 113 is an axial positioning step, which is used to prevent the friction shaft 11 from axially escaping. 114 is the action surface of the constant torque structure 1, which is used to apply torque to the parts to be screwed. There is a through hole 124 in the middle of the friction shaft 11, which is used when the parts to be screwed need to pass through. When the friction sleeve 12 is rotated, the square boss on the friction sleeve 12 slowly slides over the wedge-shaped boss on the friction shaft 11, and slips when the highest point of the wedge-shaped boss on the friction shaft 11 is reached, and the torque value is maximum at this time.

[0057] According to the embodiment of the present disclosure, Figure 8 As shown, a plane 122 of the friction sleeve 12 also has a corresponding number of evenly distributed square bosses 121 along the axial direction. The ergonomic surface 123 is a hand action surface, which conforms to ergonomics and can ensure that the user can hold the friction sleeve tightly and tighten it effectively to generate the maximum tightening torque, apply the maximum torque to the parts to be tightened, and prevent accidents such as the ultrasonic blade falling off and the thread breaking due to torque problems.

[0058] According to the embodiment of the present disclosure, when the constant torque structure begins to be used, the friction shaft 11 is first inserted into the friction sleeve 12, and the parts to be tightened are installed on the action surface 114. The human hand contacts the ergonomic surface 123 and starts to rotate the friction sleeve 12. At this time, the square boss 121 on the friction sleeve 12 gradually slides over the wedge surface 1111. During this process, the second plane 122 will deform downward in the axial direction. When the deformation is the largest, that is, when it slides to the highest point of the wedge surface 1111, the torque is the largest. When it is necessary to unload the tightened parts, the friction sleeve 12 can be rotated in the reverse direction. At this time, the vertical surface 1112 will be blocked by the side of the square boss 121, and a reverse torque will be applied.

[0059] According to the embodiment of the present disclosure, it should be clear that if the first plane on the friction shaft 11 is also deformed, the torque cannot be controlled. Therefore, in terms of material design, the material hardness of the friction shaft 11 should be greater than the hardness of the friction sleeve 12. For example, the friction shaft 11 can be made of special engineering plastics such as PPSU, PESU, etc., while the friction sleeve 12 can be made of general engineering plastics such as PC, PP, etc.

[0060] In this article, there are several points to note:

[0061] (1) The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to the general design.

[0062] (2) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0063] (3) The above description is merely an exemplary embodiment of the present disclosure and is not intended to limit the scope of protection of the present disclosure. The scope of protection of the present disclosure is determined by the appended claims.

[0064] Except for the technical features described in the specification, the other technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present utility model, the other technical features will not be described in detail here.

Claims

1. A constant torque structure for an ultrasonic knife system, comprising a transducer, a test rod of the transducer and an ultrasonic knife, characterized in that: A constant torque structure is provided between the transducer and the ultrasonic knife for connecting the two; The constant torque structure includes: The friction shaft includes a proximal end and a distal end relative to each other, and further includes: A first plane, the first plane is located at the distal end of the friction shaft and has at least one wedge-shaped boss distributed along the circumference of the surface; Axial positioning steps are provided in plurality and are located at the proximal end of the friction shaft. The axial positioning steps are subjected to external force and are in an inwardly contracted state, and are not subjected to external force and return to a circumferentially distributed state; A plurality of rectangular grooves are provided and are located at the proximal end of the friction shaft, and the rectangular grooves and the positioning steps are distributed on the same circumferential surface; an action surface, located at the distal end of the friction shaft; The friction sleeve includes a proximal end and a distal end relative to each other, and further includes: A second plane, the second plane is located at the far end of the friction sleeve, and the surface of the second plane is axially distributed with a corresponding number of square bosses that are extrusion-fitted with the wedge-shaped bosses; The through holes are distributed along the route from the proximal end to the distal end of the friction sleeve and penetrate the friction sleeve, and the through holes are limitedly matched with the proximal end of the friction shaft.

2. A constant torque structure for an ultrasonic knife system according to claim 1, characterized in that: The wedge-shaped boss includes a wedge-shaped surface and a vertical surface.

3. A constant torque structure for an ultrasonic knife system according to claim 2, characterized in that: When the maximum tightening force is generated, the wedge-shaped surface passes over the square boss.

4. The constant torque structure for an ultrasonic knife system according to claim 1, characterized in that: The axial positioning step comprises a proximal end and a distal end relative to each other, a protrusion is arranged on the outer surface of the axial positioning step and is located at the proximal end, and the outer surface of the protrusion is a gradient layer from the proximal end to the distal end of the axial positioning step.

5. The constant torque structure for an ultrasonic knife system according to claim 1, characterized in that: The through hole comprises a proximal end and a distal end opposite to each other, and the diameter of the through hole is expanded at least once from the proximal end to the distal end.

6. A constant torque structure for an ultrasonic knife system according to claim 5, characterized in that: The through hole includes between the proximal end and the distal end: An action surface that cooperates with the raised limit position of the axial positioning step; The active surface is located at at least one of the aperture enlargement positions between the proximal end and the distal end of the through hole.

7. The constant torque structure for an ultrasonic knife system according to claim 1, characterized in that: The outer surface of the friction sleeve is provided with a human-machine engineering surface.

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