Fixed torque wrench for ultrasonic knife

Abstract

The utility model discloses a fixed torque wrench for an ultrasonic knife, relates to the technical field of medical instruments, and aims to solve the problems that if a manual mounting mode is used by medical staff in the actual use process, the tightening torque is uncontrollable, threads are damaged due to overlarge tightening torque, and the tightening torque is uncontrollable. The ultrasonic scalpel comprises a sleeve body, and the sleeve body comprises a near end and a far end which are opposite to each other; the deformation boss is located at the far end of the sleeve body and arranged on the inner wall of the sleeve body and protrudes in the radial direction; the torque wrench can achieve constant torque connection of the tool bits and the transducers, and it is guaranteed that each tool bit and each transducer are reliably connected. Meanwhile, in the process of achieving the constant torque, the structure only needs to rotate by a small angle with a small rotating radius to generate the torque, the working efficiency is high, and the user experience is high.

Description

Technical Field

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

[0002] In the field of minimally invasive surgery, ultrasonic soft tissue surgery equipment is widely used. Compared with other minimally invasive surgical instruments such as high-frequency electric knives, its 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] Ultrasonic soft tissue surgery equipment is mainly composed of an ultrasonic generator, a transducer, and an ultrasonic blade. The ultrasonic blade is screwed to the transducer through a thread. In actual use, if medical staff rely on manual installation, the tightening torque may be uncontrollable. Too large a tightening torque may damage the thread, while too small a tightening torque may cause the blade to fall off the transducer during the vibration of the blade rod. Both of these situations will make the ultrasonic blade unusable.

[0004] Therefore, when developing ultrasonic scalpel products, equipment manufacturers are required to provide tools for fixing the tightening torque so that the ultrasonic scalpel can work most efficiently under this torque and will not fall off. For this reason, we proposed a fixed torque wrench for ultrasonic scalpels. Utility Model Content

[0005] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a fixed torque wrench for an ultrasonic knife to solve the above-mentioned technical problems.

[0006] The utility model solves the technical problem by adopting the following technical solution: a fixed torque wrench for ultrasonic knife, comprising:

[0007] a sleeve body, the sleeve body comprising a proximal end and a distal end relative to each other;

[0008] A deformed boss located at the distal end of the sleeve and arranged on the inner wall of the sleeve and protruding radially;

[0009] A recessed pit located at the distal end of the sleeve body and arranged on the outer wall of the sleeve body and concave inwardly in the radial direction and cooperating with the deformed boss;

[0010] A friction surface distributed on the outer surface of the sleeve and located at the proximal end of the sleeve;

[0011] a body of rotation having a longitudinal axis and including proximal and distal ends relative to each other;

[0012] Among them, the rotating body is provided with:

[0013] A limiter connected to the deformed boss by a tightening torque, wherein a protrusion is provided on the outer surface of the limiter and is located at the far end of the rotating body;

[0014] The opening cooperates with the working surface of the part to be tightened and is located at the far end of the rotating body;

[0015] A positioning body is arranged at the proximal end of the rotating body.

[0016] In at least some embodiments, the sleeve has a minimum tightening torque state and a maximum tightening torque state and is configured as follows:

[0017] When the sleeve is in a state of minimum tightening torque, the limiting body does not go over the deformation boss;

[0018] When the sleeve is in the state of maximum tightening torque, the limiting body passes over the deformation boss.

[0019] In at least some embodiments, the sleeve is twisted and rotated in a circular direction under the action of an external force, so that the sleeve is transformed from the minimum tightening torque state to the maximum tightening torque state.

[0020] In at least some embodiments, the sleeve body is provided with a positioning section which cooperates with the positioning body and is located at the proximal end of the sleeve body.

[0021] In at least some embodiments, the positioning body includes a positioning portion that can be inserted into the positioning segment and perform positioning.

[0022] In at least some embodiments, the positioning portion includes a proximal end and a distal end relative to each other, a protrusion is provided on the outer surface of the positioning portion 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 positioning portion.

[0023] In at least some embodiments, the positioning segment includes a proximal end and a distal end relative to each other, and the diameter increases at least once from the proximal end to the distal end.

[0024] In at least some embodiments, the positioning segment includes an action surface between the proximal end and the distal end thereof that cooperates with the positioning portion to limit the position, and the action surface is located at at least one of the aperture enlargement positions between the proximal end and the distal end of the positioning segment.

[0025] Beneficial Effects

[0026] The torque wrench of the utility model can realize the constant torque connection between the cutter head and the transducer, ensuring that each cutter head and the transducer used are reliably connected. At the same time, in the process of realizing the constant torque, the structure only needs to rotate a small angle with a small rotation radius to generate torque, which has high work efficiency and high user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] FIG. 1 is a schematic diagram of the assembly of the sleeve and the rotating shaft of the utility model.

[0029] FIG. 2 is a schematic diagram of the assembly completion of the sleeve and the rotary cylinder of the utility model.

[0030] Figure 3 is Figure 1 Schematic diagram of the middle sleeve.

[0031] Figure 4 is Figure 3 Schematic diagram of the middle sleeve from another perspective.

[0032] Figure 5 is Figure 1 Schematic diagram of the rotation axis.

[0033] Figure 6 is Figure 5 Schematic diagram of another perspective of the central rotation axis.

[0034] FIG. 7 is a schematic diagram of the cooperation between the deformed boss and the ratchet teeth. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] According to the embodiments of the present disclosure, a fixed torque wrench for an ultrasonic knife is provided, comprising a sleeve body 1, wherein the sleeve body 1 comprises a proximal end and a distal end relative to each other, a deformable boss 12 located at the distal end of the sleeve body 1 and arranged on the inner wall of the sleeve body 1 and protruding radially, the deformable boss is elastic, and when subjected to the force of the protruding portion of the limiting body, the deformable boss deforms outward, at which time the sleeve body is in a state of maximum tightening torque, at which time the sleeve body will apply the maximum tightening torque to the parts to be tightened, and due to the setting of the vertical surface of the protruding portion of the limiting body, the sleeve body can be effectively prevented from reversing, and the friction surface 11 distributed on the outer surface of the sleeve body and located at the proximal end of the sleeve body, the friction surface is convenient for the user to hold and operate, and will not cause hand pain during operation. Pain and other situations, at the same time, the friction surface is set to a wide surface structure, which is convenient for users to hold and use their strength to drive the sleeve to rotate, so as to apply the maximum tightening force, and a rotating body 2 having a longitudinal axis and comprising a proximal end and a distal end relative to each other, the rotating body cooperates with the sleeve, and the positioning body on the sleeve can cooperate with the rotating body to limit the axial disengagement of the rotating body. When the sleeve is twisted, the sleeve is in a minimum tightening torque state, and the sleeve does not apply the maximum tightening torque to the rotating body. Only when the protruding part of the limiting body acts on the deformed boss, the sleeve generates the maximum tightening torque on the rotating body, so that the rotating body generates the maximum tightening torque to the target to be tightened; wherein, the rotating body 2 is provided with:

[0040] A limit body connected to the deformable boss for tightening torque, and a protrusion is provided on the outer surface of the limit body and is located at the far end of the rotating body; an opening and an action surface that cooperate with the part to be tightened and is located at the far end of the rotating body; a positioning body 23 is arranged at the proximal end of the rotating body, and the opening size of the action surface 14 is matched with the size of the part to be tightened. When the rotating body is subjected to the force of the sleeve, the part to be tightened will be driven to rotate and tighten through the action surface. The deformation boss is matched with the action force of the limit body to generate a maximum tightening torque for the part to be tightened, which can prevent medical staff from using uncontrollable tightening torque manually, and there will be no situation where the torque is too large to cause the thread to be damaged or the torque is too small to cause it to fall off. The maximum tightening torque applied by the sleeve and the rotating body is determined based on the material, size, height, thickness, and length of the above-mentioned parts. Different maximum tightening torques can be adjusted through different sizes, and the torque wrench required for the maximum tightening torque required for matching is required according to the specifications and models of different parts to be tightened.

[0041] For example, Figures 1 to 3 According to the embodiment of the present disclosure, the sleeve body provided has a minimum tightening torque state and a maximum tightening torque state and is constructed as follows: when the limiting body does not pass over the deformation boss, the sleeve body is in the minimum tightening torque state; when the limiting body passes over the deformation boss, the sleeve body is in the maximum tightening torque state. During the screwing process of the sleeve body, the maximum tightening torque will only be generated when the protrusion on the surface of the limiting body passes over the deformation boss. When the protrusion of the limiting body passes over the deformation boss, the protrusion is provided to avoid reversal of the rotating body, thereby facilitating safe tightening of the parts to be tightened.

[0042] According to the embodiments of the present disclosure, the sleeve is twisted and rotated in a circular direction under the action of an external force, so that the sleeve is changed from a minimum tightening torque state to a maximum tightening torque state. The sleeve is made of engineering plastics, such as PC, POM, PA, etc. The use of engineering plastics ensures that the overall device is light and convenient for users to operate. At the same time, a friction surface is provided on the outer surface of the sleeve. The outer shape of the sleeve conforms to the structure of the human hand, which is convenient for users to hold the sleeve to apply force and facilitate stable operation.

[0043] According to the embodiments of the present disclosure, a positioning section 13 is provided on the sleeve 1, which cooperates with the positioning body and is located at the proximal end of the sleeve. The positioning section is used to cooperate with the positioning body for positioning, so that the rotating body and the sleeve are connected and positioned. When the sleeve rotates under the action of external force, the limiting body provided on the surface of the rotating body passes over the deformation boss to generate the maximum tightening torque. In the above process, the positioning section can position the rotating shaft and the sleeve to prevent the rotating body from detaching along the axial direction.

[0044] According to the embodiment of the present disclosure, the positioning body 23 includes a positioning portion 24 that can be inserted into the positioning segment and perform positioning. At least two positioning portions 24 are provided and distributed along the circumference. The positioning portions are made of a restorative material. A gap is provided between adjacent positioning portions to allow the positioning portions to move inward under the action of a force, so that the positioning portions move inward and then are inserted into the positioning segment. After the positioning portions are inserted into the positioning segment, the positioning portions themselves have restorability. After being inserted into the positioning segment, the positioning portions return to a circular distribution state and are no longer in an inwardly moved state. When the user twists the sleeve, the positioning portions are in an active state in the positioning segment, which facilitates the use of the sleeve with the rotating body.

[0045] According to the embodiment of the present disclosure, the positioning portion 24 includes a proximal end and a distal end relative to each other. A protrusion 25 is provided on the outer surface of the positioning portion 24 and is located at the proximal end. The outer surface of the protrusion 25 is a gradient layer from the proximal end to the distal end of the positioning portion 24. The protrusion is inserted into the interior of the positioning section together with the positioning portion. After the protrusion enters the positioning section, it can prevent the rotating body from being separated from the sleeve body. The structure of the protrusion increases in thickness from the proximal end to the distal end of the positioning portion. The protrusion located at the proximal end of the positioning portion is an inclined surface. In the process of entering the positioning section, the inclined surface of the protrusion is squeezed by the positioning section, so that the positioning portion is set inwardly, which is convenient for the rotating shaft to enter the interior of the sleeve body for connection and positioning.

[0046] According to the embodiment of the present disclosure, the positioning section 13 includes a proximal end and a distal end relative to each other, and the diameter between the proximal end and the distal end is expanded at least once. The positioning section 13 includes an action surface 14 that cooperates with the positioning portion between the proximal end and the distal end, and the action surface 14 is located at at least one of the aperture expansion positions between the proximal end and the distal end of the positioning section. The positioning section is composed of at least two positioning holes of different diameters, the large-diameter positioning hole is located at the proximal end of the positioning section, and the small-diameter positioning hole is located at the distal end of the positioning section. Therefore, the diameters of the multiple positioning holes increase sequentially from the distal end to the proximal end of the positioning section. When the positioning portion drives the protrusion to enter the positioning section, it first passes through the small-diameter positioning hole to the protrusion. The inclined surface is used to extrude the multiple positioning parts so that they move inward. The protrusion will completely pass through the first positioning hole and enter the large-diameter positioning hole at the back. At this time, the positioning part itself has restorative properties and is no longer in a state of moving inward. At the same time, there is an action surface at the connection between the small-diameter positioning hole and the large-diameter positioning hole. The action surface blocks the end face of the tail of the protrusion to prevent the positioning part from moving back, and the minimum area of ​​the action surface is smaller than the outermost circumferential area formed by the end faces of the tail of the protrusion when the multiple positioning parts are in a normal state. When the positioning parts are in a state of moving inward, the outermost circumferential area formed by the end faces of the tail of the protrusion when the multiple positioning parts are in a normal state is larger than the minimum area of ​​the action surface.

[0047] In this article, there are a few points to note:

[0048] (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.

[0049] (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.

[0050] (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.

Claims

1. A fixed torque wrench for an ultrasonic knife, characterized in that: include: A sleeve body (1), the sleeve body (1) comprising a proximal end and a distal end relative to each other; A deformable boss (12) located at the distal end of the sleeve body (1) and arranged on the inner wall of the sleeve body (1) and protruding radially; A recess located at the distal end of the sleeve body (1) and arranged on the outer wall of the sleeve body (1) and radially concave and cooperating with the deformation boss (12); A friction surface (11) distributed on the outer surface of the sleeve and located at the proximal end of the sleeve; A rotating body (2) having a longitudinal axis and including a proximal end and a distal end relative to each other; The rotating body (2) is provided with: A limiter connected to the deformed boss by a tightening torque, wherein a protrusion is provided on the outer surface of the limiter and is located at the far end of the rotating body; The opening cooperates with the working surface of the part to be tightened and is located at the far end of the rotating body; A positioning body (23) is arranged at the proximal end of the rotating body.

2. A fixed torque wrench for ultrasonic scalpel according to claim 1, characterized in that: The sleeve body has a minimum tightening torque state and a maximum tightening torque state.

3. A fixed torque wrench for ultrasonic scalpel according to claim 2, characterized in that: The sleeve body is twisted and rotated in a circular direction under the action of an external force, so that the sleeve body is transformed from the minimum tightening torque state to the maximum tightening torque state.

4. A fixed torque wrench for ultrasonic scalpel according to claim 1, characterized in that: The sleeve body is provided with a positioning section (13) which cooperates with the positioning body and is located at the proximal end of the sleeve body.

5. A fixed torque wrench for ultrasonic scalpel according to claim 4, characterized in that: The positioning body (23) comprises a positioning portion (24) capable of being inserted into the positioning section and performing positioning.

6. A fixed torque wrench for ultrasonic scalpel according to claim 5, characterized in that: The positioning portion (24) comprises a proximal end and a distal end which are opposite to each other, a protrusion (25) is provided on the outer surface of the positioning portion (24) and is located at the proximal end, and the outer surface of the protrusion (25) is a gradient layer from the proximal end to the distal end of the positioning portion (24).

7. A fixed torque wrench for ultrasonic scalpel according to claim 4, characterized in that: The positioning section (13) comprises a proximal end and a distal end relative to each other, and the diameter between the proximal end and the distal end is expanded at least once.

8. A fixed torque wrench for ultrasonic scalpel according to claim 5, characterized in that: The positioning section (13) comprises an action surface (14) between the proximal end and the distal end thereof, which cooperates with the positioning portion (24) in limiting position, and the action surface (14) is located at at least one of the aperture enlargement positions between the proximal end and the distal end of the positioning section.

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