torque wrench

Abstract

The application relates to a torque wrench. The torque wrench comprises a housing with a receiving cavity, a driving part movably arranged in the receiving cavity, a driven part rotatably arranged in the receiving cavity and coaxially arranged with the driving part, a knife rod limiting groove arranged on the driven part, a knife rod arranged in the knife rod limiting groove, and an elastic part arranged between the housing and the driving part. The driving part is coupled with the driven part to a target state through the elastic part, and the knife rod is fastened to a target position in the target state. When the knife rod is fastened, the driving part and the driven part are changed from the coupled state to the target state, and the elastic force of the elastic part changes in the state changing process due to the action of the driving part on the elastic part. Therefore, the elastic force in the target state is set to ensure that the knife rod is in the target position after the knife rod is fastened, so that the ultrasonic energy transmission efficiency of the ultrasonic knife is improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a torque wrench. Background Technology

[0002] In clinical practice, ultrasonic scalpels have advantages such as high surgical precision, simple operation, small surgical trauma area, less bleeding, and short operation time, and are widely used in colorectal surgery, gastric surgery, cholecystectomy and other surgeries.

[0003] An ultrasonic scalpel mainly consists of two parts: an ultrasonic transducer and a waveguide rod carrying the scalpel tip. Before surgery, the transducer and waveguide rod typically need to be assembled. To facilitate assembly, related technologies incorporate an integrally molded torque locking device on the ultrasonic scalpel to lock the waveguide rod. However, on the one hand, the torque of this locking device is unstable, easily resulting in over-tightening or incomplete tightening, thus reducing the ultrasonic energy transmission efficiency of the ultrasonic scalpel, affecting surgical quality, and even damaging the waveguide rod. On the other hand, during assembly, the torque locking device is difficult to apply force to, leading to low assembly efficiency of the ultrasonic scalpel. Summary of the Invention

[0004] Based on this, this application proposes a torque wrench to address at least one of the above-mentioned problems.

[0005] A torque wrench for tightening the handle of an ultrasonic scalpel, specifically, the torque wrench includes:

[0006] The shell has a receiving cavity.

[0007] The active component is movably disposed within the receiving cavity.

[0008] The driven member is rotatably disposed within the receiving cavity and coaxially arranged with the driving member. The driven member is provided with a tool holder limiting groove. The tool holder is used to pass through the tool holder limiting groove.

[0009] An elastic element is disposed between the housing and the active element.

[0010] The active member acts on the elastic member to realize the coupling state between the active member and the driven member to the target state, and in the target state, the tool holder is fastened to the target position.

[0011] In one embodiment, in the coupled state, the driving member and the driven member are in transmission engagement; when transitioning from the coupled state to the target state, the driven member rotates under the drive of the driving member, and the driving member moves relative to the driven member to act on the elastic member; in the target state, the driving member and the driven member disengage from transmission, and the elastic force of the elastic member is equal to the torque that puts the tool holder in the target position.

[0012] In one embodiment, a transmission structure is provided between the driving member and the driven member; under the action of the transmission structure, the driving member drives the driven member to rotate and moves relative to the driven member to compress the elastic member.

[0013] In one embodiment, the transmission structure includes a first protrusion and a first groove that cooperate with each other, one of the first protrusion and the first groove being disposed at one end of the driving member near the driven member, and the other being disposed at one end of the driven member near the driving member.

[0014] In one embodiment, the first protrusion is disposed at one end of the active member near the driven member, and the first groove is disposed at one end of the driven member near the active member.

[0015] In the coupled state, the sidewall of the first protrusion abuts against the sidewall of the first groove. In the target state, the sidewall of the first protrusion disengages from the sidewall of the first groove, and the top wall of the first protrusion abuts against the end face of the driven member near the driving member. The elastic member is also used to rebound the driving member so that the sidewall of the first protrusion abuts against the sidewall of the first groove.

[0016] In one embodiment, the first protrusion is arranged around the rotation center line of the active member. A first sliding wall is provided on one circumferential side of the first protrusion.

[0017] The first groove is arranged around the rotation center line of the driven member. A second sliding wall that mates with the first sliding wall is provided on one circumferential side of the first groove.

[0018] Both the first sliding wall and the second sliding wall are helical curved surfaces.

[0019] In one embodiment, a third sliding wall is provided on one circumferential side of the first protrusion, and the third sliding wall and the first sliding wall are respectively located on the circumferential sides of the first protrusion.

[0020] A fourth sliding wall that cooperates with the first sliding wall is provided on one circumferential side of the first groove, and the fourth sliding wall and the second sliding wall are respectively located on the two circumferential sides of the first groove.

[0021] Both the third sliding wall and the fourth sliding wall are helical surfaces, and the direction of rotation of the third sliding wall is opposite to that of the first sliding wall.

[0022] In one embodiment, the slope of the third sliding wall is greater than the slope of the first sliding wall.

[0023] In one embodiment, the top wall of the first protrusion and the end face of the driven member near the driving member are both planar.

[0024] In one embodiment, there are multiple first protrusions and multiple first grooves, with the multiple first protrusions arranged at intervals around the rotation center line of the driving member and the multiple first grooves arranged at intervals around the rotation center line of the driven member.

[0025] In one embodiment, the driving member includes a first shaft segment and a second shaft segment connected to each other, the second shaft segment being located at the end of the first shaft segment near the driven member. The outer diameter of the first shaft segment is smaller than the outer diameter of the second shaft segment.

[0026] The elastic element is sleeved on the first shaft segment, and the end of the elastic element away from the housing abuts against the second shaft segment.

[0027] In one embodiment, the housing is provided with a first cavity and a second cavity communicating with the receiving cavity, the first cavity and the second cavity being respectively located on both sides of the receiving cavity along a first direction.

[0028] The first shaft segment passes through the first cavity opening, and the end of the driven member away from the driving member passes through the second cavity opening. The first direction is parallel to the rotation center line of the driving member and / or the rotation center line of the driven member.

[0029] In one embodiment, a transmission protrusion is provided at the first cavity opening, and a transmission groove that cooperates with the transmission protrusion is provided on the first shaft segment.

[0030] And / or, the tool holder limiting groove is located at the end of the driven member away from the driving member.

[0031] In one embodiment, both the driving member and the driven member are constructed as hollow tubular structures.

[0032] In one embodiment, the housing is driven in conjunction with the drive element.

[0033] And / or, the housing includes a top cover and a bottom cover that overlap each other, the top cover and the bottom cover together forming the receiving cavity. The top cover and the bottom cover are detachably connected.

[0034] The torque wrench provided in this application, when tightening the scalpel, causes the driving and driven parts to change from a coupled state to a target state. At the same time, since the driving part acts on the elastic part, the elastic force of the elastic part changes during the state change. In this way, by setting the elastic force in the target state, the scalpel can be kept in the target position after tightening, thereby improving the ultrasonic energy transfer efficiency of the ultrasonic scalpel. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of an ultrasonic scalpel and torque wrench provided in an embodiment of this application.

[0037] Figure 2 for Figure 1 The diagram shows the structure of a torque wrench.

[0038] Figure 3 for Figure 1 The exploded view of the torque wrench shown.

[0039] Figure 4 for Figure 3 Assembly diagram of the driving component, driven component and elastic component.

[0040] Figure 5 for Figure 3 A schematic diagram of the structure of the central active component.

[0041] Figure 6 for Figure 3 A schematic diagram of the driven component.

[0042] Figure 7 This is a schematic diagram of another torque wrench provided in an embodiment of this application.

[0043] Figure 8 for Figure 7 A schematic diagram of the AA section structure.

[0044] Figure 9 for Figure 8 A schematic diagram of the structure of the central active component.

[0045] Explanation of reference numerals in the attached figures:

[0046] 10. Torque wrench; 11. Housing; 11a. Receiving cavity; 11b. First cavity opening; 11c. Second cavity opening; 111. Top cover; 1111. Slot; 112. Bottom cover; 1121. Buckle; 113. Transmission protrusion; 114. Force application part; 12. Driving member; 121. First protrusion; 1211. First sliding wall; 1212. Third sliding wall; 1213. Top wall; 122. First shaft segment; 1221. Transmission groove; 123. Second shaft segment; 13. Driven member; 131. Tool bar limiting groove; 132. First groove; 1321. Second sliding wall; 1322. Fourth sliding wall; 1323. Bottom wall; 14. Elastic member; 20. Ultrasonic scalpel; 21. Tool bar. Detailed Implementation

[0047] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0048] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0053] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, in this specification, the term “and / or” includes any and all combinations of the associated listed items.

[0054] Please refer to Figure 1 , Figure 2 and Figure 3 As shown, this application embodiment provides a torque wrench 10, which is used to tighten the handle 21 of the ultrasonic scalpel 20.

[0055] Specifically, the torque wrench 10 includes a housing 11, a driving member 12, a driven member 13, and an elastic member 14. The housing 11 has a receiving cavity 11a. The driving member 12 is movably disposed within the receiving cavity 11a. The housing 11 is used to drive the driving member 12 to rotate. The driven member 13 is movably disposed within the receiving cavity 11a and is coaxially arranged with the driving member 12. The driven member 13 is provided with a tool holder limiting groove 131. The tool holder 21 is used to pass through the tool holder limiting groove 131. The elastic member 14 is disposed between the housing 11 and the driving member 12.

[0056] The active member 12 acts on the elastic member 14 to realize the coupling state between the active member 12 and the driven member 13 to the target state. In the target state, the tool holder 21 is fastened to the target position.

[0057] Here, it should be noted that the coupling state refers to the mutual transmission and cooperation between the driving member 12 and the driven member 13, that is, the rotation of the driving member 12 drives the rotation of the driven member 13. The target state refers to the disengagement of the driven member 13 from the driving member 12, that is, the rotation of the driving member 12 does not cause the driven member 13 to rotate. The target position refers to the position of the tool holder 21 when the transducer of the ultrasonic scalpel 20 is in a preset locking state. This preset locking state can be understood as the locking force between the tool holder 21 and the transducer reaching a preset threshold. When in the preset locking state, the ultrasonic energy transfer efficiency between the tool holder 21 and the transducer is relatively good.

[0058] Here, "the driving member 12 is movably disposed within the receiving cavity 11a" means that the driving member 12 can move relative to the housing 11 within the receiving cavity 11a. "The driven member 13 is movably disposed within the receiving cavity 11a" means that the driven member 13 can move relative to the housing 11 within the receiving cavity 11a. Furthermore, the driven member 13 can rotate relative to the housing 11 within the receiving cavity 11a.

[0059] The torque wrench 10 provided in this embodiment of the application, when tightening the blade shank 21, causes the driving member 12 and the driven member 13 to change from a coupled state to a target state. At the same time, since the driving member 12 acts on the elastic member 14, the elastic force of the elastic member 14 changes during the state change. In this way, by setting the elastic force in the target state, the blade shank 21 can be kept in the target position after tightening, thereby improving the ultrasonic energy transmission efficiency of the ultrasonic scalpel 20.

[0060] In one embodiment, the housing 11 is driven by the driving member 12. Here, the drive engagement means that rotating the housing 11 can drive the driving member 12 to rotate. Thus, in this embodiment, the housing 11 has at least two functions: firstly, it constructs a receiving cavity 11a for assembling other components (driving member 12, driven member 13, and elastic member 14), facilitating the assembly of all components of the torque wrench 10 into a whole; secondly, when tightening the handle 21, the operator rotates the housing 11, and the housing 11 transmits this rotational force to the driving member 12, which in turn drives the driven member 13, thereby causing the driven member 13 to tighten the handle 21.

[0061] In one embodiment, in the coupled state, the driving member 12 and the driven member 13 are in a transmission engagement. When transitioning from the coupled state to the target state, the driven member 13 rotates under the drive of the driving member 12, and the driving member 12 moves relative to the driven member 13 to act on the elastic member 14. In the target state, the driving member 12 and the driven member 13 disengage from the transmission, and the elastic force of the elastic member 14 is equal to the torque that brings the tool holder 21 to the target position.

[0062] In this embodiment, the driven member 13 is located on one side of the driving member 12 in the axial direction, and the rotation center line of the driven member 13 coincides with the rotation center line of the driving member 12. The elastic member 14 is used to apply an elastic force to the driving member 12. On the one hand, it can press the driving member 12 and the driven member 13 together to make their transmission cooperation reliable; on the other hand, it is convenient to set a preset elastic force value for the elastic member 14, which is equal to the torque that puts the tool holder 21 in the target position.

[0063] The operation process of the torque wrench 10 provided in this embodiment is as follows:

[0064] First, the torque wrench 10 is fitted onto the tool holder 21, and a portion of the outer contour of the tool holder 21 is engaged in the tool holder limiting groove 131. Then, the housing 11 is manually rotated, causing the driving member 12 to rotate, which in turn causes the driven member 13 to rotate, and the driven member 13 tightens the tool holder 21. During rotation, the driving member 12 simultaneously moves away from the driven member 13 along its own axis, gradually compressing the elastic member 14, and the elastic force gradually increases. When the driving member 12 and the driven member 13 reach the target state, i.e., the driving member 12 has moved a preset distance and disengaged from the driven member 13, the elastic force of the elastic member reaches a preset value, and the tool holder 21 is in a preset locked state.

[0065] It should be noted that when the driving member 12 and the driven member 13 reach the target state, the compression deformation of the elastic member 14 is at its maximum, and at this time, the elastic force of the elastic member 14 is the preset elastic force. This embodiment of the application sets a preset elastic force for the elastic member 14, which characterizes the torque of the torque wrench 10, thereby making the torque setting of the torque wrench 10 more accurate and solving the problems of unstable torque and poor consistency in traditional torque locking devices.

[0066] It is understandable that after the elastic element 14 is compressed, the elastic force of the elastic element 14 is linearly related to the amount of compression. The preset elastic force of the elastic element 14 can be set by setting the amount of compression of the elastic element 14.

[0067] It should be noted that the embodiments of this application are described using the compression elastic member 14 as an example. The elastic member 14 can also be a tension elastic member 14. That is, when the active member 12 moves, the elastic member 14 is stretched. When the active member 12 and the driven member 13 reach the target state, the elastic member 14 is stretched to the maximum extent. At this time, the elastic force is the preset elastic force.

[0068] The torque wrench 10 provided in this embodiment of the application has an active member 12, a driven member 13, and an elastic member 14 arranged within a housing 11. The driven member 13 is driven by the active member 12, and the elastic member 14 applies a preset elastic force to the active member 12. Thus, when tightening the blade 21, manually rotating the housing 11 causes the active member 12 to rotate, which in turn drives the driven member 13 to rotate. Simultaneously, the active member 12 moves axially away from the driven member 13. When the active member 12 and the driven member 13 reach the target state, they disengage, and the blade 21 is in the target position. The entire tightening process is convenient for applying force, improving the assembly efficiency of the ultrasonic scalpel 20. Furthermore, by setting the preset elastic force of the elastic member 14, the blade 21 can be fully tightened, improving the ultrasonic energy transfer efficiency of the ultrasonic scalpel 20.

[0069] In one embodiment, a transmission structure is provided between the driving member 12 and the driven member 13. Under the action of the transmission structure, the driving member 12 drives the driven member 13 to rotate and moves relative to the driven member 13 to compress the elastic member 14. By providing a transmission structure, it is convenient to switch between the driving member 12 and the driven member 13 in a coupled state and a target state.

[0070] In one embodiment, the transmission structure includes a first protrusion 121 and a first groove 132 that cooperate with each other. One of the first protrusion 121 and the first groove 132 is located at the end of the driving member 12 near the driven member 13, and the other is located at the end of the driven member 13 near the driving member 12. In this way, the structure of the transmission structure can be relatively simple, which is convenient for manufacturing and assembly.

[0071] In one embodiment, reference Figure 4 , Figure 5 and Figure 6 As shown, a first protrusion 121 is disposed at the end of the driving member 12 near the driven member 13, and a first groove 132 is disposed at the end of the driven member 13 near the driving member 12. In the coupled state, the sidewall of the first protrusion 121 abuts against the sidewall of the first groove 132. In the target state, the sidewall of the first protrusion 121 disengages from the sidewall of the first groove 132, and the top wall 1213 of the first protrusion 121 abuts against the end face of the driven member 13 near the driving member 12. The elastic member 14 is also used to rebound the driving member 12 so that the sidewall of the first protrusion 121 abuts against the sidewall of the first groove 132.

[0072] Thus, when tightening the tool holder 21, manually rotating the housing 11 causes the driving member 12 to rotate, which in turn causes the driven member 13 to rotate. Simultaneously, the driving member 12 moves along its own axis away from the driven member 13. When the driving member 12 and the driven member 13 reach the target state, they disengage from the transmission, and the tool holder 21 is in the target position. Continuing to rotate the housing 11 causes the driving member 12 to rotate, while the driven member 13 does not rotate. The top wall 1213 of the first protrusion 121 slides relative to the end face of the driven member. When the driving member 12 rotates by a preset angle, the top wall 1213 of the first protrusion 121 disengages from the end face of the driven member 13 closest to the driving member 12. The elastic member 14 rebounds the driving member 12, and the side wall of the first protrusion 121 abuts against the side wall of the first groove 132, producing a crisp sound. The driving member 12 and the driven member 13 then re-engage.

[0073] The working principle of the torque wrench 10 provided in this embodiment can also be understood as follows: the driving member 12 has an initial position and a transition position along its own axial direction. When the driving member 12 is in the initial position, the sidewall of the first protrusion 121 completely abuts against the sidewall of the first groove 132. When the driving member 12 is in the transition position, the top wall 1213 of the first protrusion 121 abuts against the side end face of the driven member 13 near the driving member 12. When tightening the lever 21, the driving member 12 rotates under the drive of the housing 11, and the sidewall of the first protrusion 121 slides on the sidewall of the first groove 132, so that the driving member 12 moves from the initial position to the transition position, and causes the driving member 12 to drive the driven member 13 to rotate, compressing the elastic member 14. When the driving member 12 moves to the transition position, the sidewall of the first protrusion 121 disengages from the sidewall of the first groove 132, and the top wall 1213 of the first protrusion 121 abuts against the end face of the driven member 13 near the driving member 12, thus disengaging the driving member 12 from the driven member 13. The driving member 12 continues to rotate by a predetermined angle, and under the action of the elastic member 14, the driving member 12 springs back to the initial position.

[0074] It should be noted that the number of the first protrusion 121 and the first groove 132 can be one or more. The embodiments of this application do not limit the number of the first protrusion 121 and the first groove 132.

[0075] In one embodiment, a first protrusion 121 is arranged around the rotation center line of the driving member 12. A first sliding wall 1211 is provided on one circumferential side of the first protrusion 121. A first groove 132 is arranged around the rotation center line of the driven member 13. A second sliding wall 1321 that mates with the first sliding wall 1211 is provided on one circumferential side of the first groove 132. Both the first sliding wall 1211 and the second sliding wall 1321 are helical curved surfaces.

[0076] By setting the first sliding wall 1211 and the second sliding wall 1321 as helical curved surfaces, on the one hand, the first sliding wall 1211 can slide on the second sliding wall 1321, which facilitates the movement of the active member 12 from the initial position to the transition position; on the other hand, the active member 12 can transmit torque to the first groove 132 through the first protrusion 121 while rotating, so that the active member 12 can drive the driven member 13 to rotate.

[0077] In one embodiment, a third sliding wall 1212 is provided on one circumferential side of the first protrusion 121, and the third sliding wall 1212 and the first sliding wall 1211 are respectively located on opposite circumferential sides of the first protrusion 121. A fourth sliding wall 1322 is provided on one circumferential side of the first groove 132 to cooperate with the first sliding wall 1211, and the fourth sliding wall 1322 and the second sliding wall 1321 are respectively located on opposite circumferential sides of the first groove 132. Both the third sliding wall 1212 and the fourth sliding wall 1322 are helical surfaces, and the direction of rotation of the third sliding wall 1212 is opposite to the direction of rotation of the first sliding wall 1211.

[0078] By providing a third sliding wall 1212 on the first protrusion 121 and a fourth sliding wall 1322 on the first groove 132, on the one hand, when the active member 12 continues to rotate a certain angle at the transition position, it is convenient for the first protrusion 121 on the active member 12 to slide into the first groove 132 along the fourth sliding wall 1322, thereby allowing the active member 12 to return to its initial position; on the other hand, when the housing 11 is rotated in the opposite direction, the housing 11 drives the active member 12 to rotate in the opposite direction, the active member 12 drives the driven member 13 to rotate in the opposite direction, and the driven member 13 drives the tool bar 21 to rotate in the opposite direction, thereby removing the tool bar 21 from the transducer.

[0079] In one embodiment, the slope of the third sliding wall 1212 is greater than the slope of the first sliding wall 1211. Since the second sliding wall 1321 cooperates with the first sliding wall 1211 and the fourth sliding wall 1322 cooperates with the third sliding wall 1212, the slope of the fourth sliding wall 1322 is also greater than the slope of the first sliding wall 1211.

[0080] It should be noted that slope, or gradient, refers to the ratio of the vertical height to the horizontal width of a slope, and is also the tangent of the slope angle. When the slope is greater, the torque transmitted from the driving member 12 to the driven member 13 is greater when the driving member 12 rotates; conversely, when the slope is smaller, the torque transmitted from the driving member 12 to the driven member 13 is smaller. Understandably, when tightening the tool holder 21, it becomes increasingly tighter with each rotation. To avoid damage to the tool holder 21 due to excessive torque, the slope of the first sliding wall 1211 needs to be relatively small, thus reducing the torque transmitted from the driving member 12 to the driven member 13. When disassembling the tool holder 21, to facilitate quick disassembly, the slope of the third sliding wall 1212 needs to be relatively large, thus increasing the torque transmitted from the driving member 12 to the driven member 13.

[0081] In one embodiment, the wall surfaces of the third sliding wall 1212 and the fourth sliding wall 1322 can be reverse spiral surfaces, so that when the housing 11 is rotated in the opposite direction, the driving member 12 and the driven member 13 do not slip relative to each other.

[0082] In one embodiment, the top wall 1213 of the first protrusion 121 and the end face of the driven member 13 near the driving member 12 are both planar. In this way, when the driving member 12 is in the transition position, it is convenient for the top wall 1213 of the first protrusion 121 to slide on the end face of the driven member 13, so that the driving member 12 can return to the initial position more easily.

[0083] In one embodiment, when the driving member 12 is in the initial position, the top wall 1213 of the first protrusion 121 abuts against the bottom wall 1323 of the first groove 132, and the end face of the driving member 12 near the driven member 13 abuts against the end face of the driven member 13 near the driving member 12. This allows the driving member 12 and the driven member 13 to fit tightly together, improving the stability of their engagement. Furthermore, when the driving member 12 is springback to the initial position, the top wall 1213 of the first protrusion 121 and the bottom wall 1323 of the first groove 132, as well as the end face of the driving member 12 and the end face of the driven member 13, can collide, producing a crisp sound that alerts the operator that the tool holder 21 has reached the target position.

[0084] In one embodiment, there are multiple first protrusions 121 and multiple first grooves 132. The multiple first protrusions 121 are arranged at intervals around the rotation center line of the driving member 12, and the multiple first grooves 132 are arranged at intervals around the rotation center line of the driven member 13. In this way, the torque transmission between the driving member 12 and the driven member 13 can be made more stable.

[0085] In one embodiment, reference Figure 4 As shown, the driving member 12 includes a first shaft segment 122 and a second shaft segment 123 connected to each other, with the second shaft segment 123 located at the end of the first shaft segment 122 near the driven member 13. The outer diameter of the first shaft segment 122 is smaller than the outer diameter of the second shaft segment 123. An elastic member 14 is sleeved on the first shaft segment 122, and the end of the elastic member 14 away from the housing 11 abuts against the second shaft segment 123. This facilitates the assembly of the elastic member 14 onto the driving member 12.

[0086] In one embodiment, the housing 11 is provided with a first cavity 11b and a second cavity 11c communicating with the receiving cavity 11a. The first cavity 11b and the second cavity 11c are respectively located on both sides of the receiving cavity 11a along a first direction. Here, "first cavity 11b" and "second cavity 11c" can be understood as two openings of the receiving cavity 11a. A first shaft segment 122 passes through the first cavity 11b, and the end of the driven member 13 away from the driving member 12 passes through the second cavity 11c. The first direction is parallel to the rotation center line of the driving member 12 and the rotation center line of the driven member 13. This facilitates the assembly of the driving member 12, the driven member 13, and the housing 11.

[0087] In one embodiment, reference Figure 2 and Figure 5 As shown, a transmission protrusion 113 is provided at the first cavity opening 11b, and a transmission groove 1221 that mates with the transmission protrusion 113 is provided on the first shaft section 122. In this way, when the housing 11 rotates, the housing 11 can transmit torque to the first shaft section 122 through the transmission protrusion 113.

[0088] It is understood that there may be multiple transmission protrusions 113 and transmission grooves 1221. The embodiments of this application do not limit the number of transmission protrusions 113 and transmission grooves 1221.

[0089] In one embodiment, the tool holder limiting groove 131 is disposed at the end of the driven member 13 away from the driving member 12.

[0090] In one embodiment, both the driving member 12 and the driven member 13 are constructed as hollow tubular structures.

[0091] In this way, when tightening the tool holder 21, the tool holder 21 is passed through along the axis of the torque wrench 10, so that the outer contour of the tool holder 21 is engaged in the tool holder limiting groove 131.

[0092] In one embodiment, the housing 11 includes a top cover 111 and a bottom cover 112 that overlap each other, together forming a receiving cavity 11a. The top cover 111 and the bottom cover 112 are detachably connected. By providing the top cover 111 and the bottom cover 112, the torque wrench 10 can be easily disassembled and installed for maintenance.

[0093] In one example, refer to Figure 3 As shown, the top cover 111 and the bottom cover 112 can be connected by a snap fastener 1121. Specifically, the top cover 111 is provided with a slot 1111, and the bottom cover 112 is provided with a snap fastener 1121, which engages with the slot 1111.

[0094] In another example, refer to Figure 7 , Figure 8 and Figure 9 As shown, the top cover 111 and the bottom cover 112 can be connected by a threaded connection.

[0095] In one example, refer to Figure 9 As shown, the third sliding wall 1212 can be a plane, and the wall surface of the third sliding wall 1212 is perpendicular to the end face of the driving member 12. In this way, when the housing 11 is rotated in the opposite direction, the torque transmitted from the driving member 12 to the driven member 13 is maximized.

[0096] In the embodiments of this application, the elastic element 14 can be a wave spring or a common compression spring. The embodiments of this application do not limit the type of spring.

[0097] In one embodiment, the housing 11 is provided with a force-applying part 114, which the operator can hold when rotating the housing 11, thereby facilitating the operator to apply force for rotation.

[0098] In the description of this specification, the references to terms such as "some embodiments," "other embodiments," "ideal embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features of the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A torque wrench for tightening the handle (21) of an ultrasonic scalpel (20), characterized in that, The torque wrench (10) includes: The shell (11) has a receiving cavity (11a); The active component (12) is movably disposed within the receiving cavity (11a); The driven member (13) is movably disposed in the receiving cavity (11a) and coaxially disposed with the driving member (12); the driven member (13) is provided with a tool bar limiting groove (131); the tool bar (21) is used to pass through the tool bar limiting groove (131); An elastic element (14) is disposed between the housing (11) and the active element (12); The active member (12) acts on the elastic member (14) to realize the coupling state between the active member (12) and the driven member (13) to the target state, and in the target state, the tool holder (21) is fastened to the target position; The driving member (12) includes a first shaft segment (122) and a second shaft segment (123) connected to each other, the second shaft segment (123) being located at the end of the first shaft segment (122) near the driven member (13); the outer diameter of the first shaft segment (122) is smaller than the outer diameter of the second shaft segment (123); A transmission structure is provided between the driving member (12) and the driven member (13); the transmission structure includes a first protrusion (121) and a first groove (132) that cooperate with each other, one of the first protrusion (121) and the first groove (132) is provided at one end of the driving member (12) near the driven member (13), and the other is provided at one end of the driven member (13) near the driving member (12); The first protrusion (121) is arranged around the rotation center line of the active member (12); a first sliding wall (1211) is provided on one circumferential side of the first protrusion (121); The first groove (132) is arranged around the rotation center line of the follower (13); a second sliding wall (1321) that cooperates with the first sliding wall (1211) is provided on one circumferential side of the first groove (132); Both the first sliding wall (1211) and the second sliding wall (1321) are helical curved surfaces; A third sliding wall (1212) is provided on one circumferential side of the first protrusion (121), and the third sliding wall (1212) and the first sliding wall (1211) are respectively located on the circumferential sides of the first protrusion (121); A fourth sliding wall (1322) that cooperates with the third sliding wall (1212) is provided on one circumferential side of the first groove (132). The fourth sliding wall (1322) and the second sliding wall (1321) are respectively located on the circumferential sides of the first groove (132). Both the third sliding wall (1212) and the fourth sliding wall (1322) are helical surfaces, and the direction of rotation of the third sliding wall (1212) is opposite to that of the first sliding wall (1211); the slope of the third sliding wall (1212) is greater than that of the first sliding wall (1211). The top wall (1213) of the first protrusion (121) and the side end face of the driven member (13) near the driving member (12) are both planar; When the active member (12) rotates at a preset angle, the top wall (1213) of the first protrusion (121) disengages from the side end face of the driven member (13) near the active member (12), the elastic member (14) rebounds the active member (12), the side wall of the first protrusion (121) abuts against the side wall of the first groove (132), and a crisp sound is emitted; The housing (11) is provided with a first cavity (11b) communicating with the receiving cavity (11a), and the first cavity (11b) is located on one side of the receiving cavity (11a); the first shaft segment (122) passes through the first cavity (11b), and in the coupled state, the end of the first shaft segment (122) opposite to the driven member (13) protrudes from the housing (11); a transmission protrusion (113) is provided at the first cavity (11b), and a transmission groove (1221) is provided on the first shaft segment (122) that cooperates with the transmission protrusion (113).

2. The torque wrench according to claim 1, characterized in that, In the coupled state, the driving member (12) and the driven member (13) are in transmission engagement; when the coupling state is transitioned to the target state, the driven member (13) rotates under the drive of the driving member (12), and the driving member (12) moves relative to the driven member (13) to act on the elastic member (14); in the target state, the driving member (12) and the driven member (13) disengage from transmission, and the elastic force of the elastic member (14) characterizes the torque of the tool holder (21) at the target position.

3. The torque wrench according to claim 2, characterized in that, Under the action of the transmission structure, the driving member (12) drives the driven member (13) to rotate and moves relative to the driven member (13) to compress the elastic member (14).

4. The torque wrench according to claim 3, characterized in that, The first protrusion (121) is disposed at one end of the active member (12) near the driven member (13), and the first groove (132) is disposed at one end of the driven member (13) near the active member (12); In the coupled state, the sidewall of the first protrusion (121) abuts against the sidewall of the first groove (132); in the target state, the sidewall of the first protrusion (121) disengages from the sidewall of the first groove (132), and the top wall (1213) of the first protrusion (121) abuts against the side end face of the driven member (13) near the driving member (12); the elastic member (14) is also used to rebound the driving member (12) so that the sidewall of the first protrusion (121) abuts against the sidewall of the first groove (132).

5. The torque wrench according to any one of claims 1-4, characterized in that, The number of the first protrusion (121) and the first groove (132) are both multiple. The multiple first protrusions (121) are arranged at intervals around the rotation center line of the driving member (12), and the multiple first grooves (132) are arranged at intervals around the rotation center line of the driven member (13).

6. The torque wrench according to any one of claims 1-4, characterized in that, The elastic element (14) is sleeved on the first shaft segment (122), and the end of the elastic element (14) away from the housing (11) abuts against the second shaft segment (123).

7. The torque wrench according to claim 6, characterized in that, The housing (11) is provided with a second cavity (11c) communicating with the receiving cavity (11a), and the first cavity (11b) and the second cavity (11c) are respectively provided on both sides of the receiving cavity (11a) along the first direction; The driven member (13) has one end away from the driving member (12) passing through the second cavity (11c); the first direction is parallel to the rotation center line of the driving member (12) and / or the rotation center line of the driven member (13).

8. The torque wrench according to claim 7, characterized in that, The tool holder limiting groove (131) is located at the end of the driven member (13) away from the driving member (12).

9. The torque wrench according to claim 7, characterized in that, Both the driving member (12) and the driven member (13) are constructed as hollow tubular structures.

10. The torque wrench according to any one of claims 1-4, characterized in that, The housing (11) is in a transmission engagement with the driving component (12); And / or, the housing (11) includes a top cover (111) and a bottom cover (112) that overlap each other, the top cover (111) and the bottom cover (112) together forming the receiving cavity (11a); the top cover (111) and the bottom cover (112) are detachably connected.

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