A scissor-head type clamping force measuring device for cutting tools

Abstract

This utility model discloses a force measuring device for a scissor-tip type clamping cutter, applied in the field of medical device testing technology. It includes a base and a force measuring mechanism mounted on it. The force measuring mechanism includes a base, a fixing component, a rocker arm, and a pressure sensor. The rocker arm is rotatably connected to the base, with a rocker arm clamp at one end and a pressure sensor below the other end. The fixing component is located above the rocker arm, with a fixing clamp adjacent to the rocker arm clamp. The jaws of the ultrasonic cutter are clamped on the fixing clamp and the rocker arm clamp. When the jaws close, the rocker arm presses down on the pressure sensor under the clamping force, thereby measuring the force value. This device has a reasonable structure and is easy to operate. It can measure the clamping force of the ultrasonic cutter in real time and accurately under different clamping states such as micro-closed, semi-closed, and fully closed, and is suitable for surgical tool force value detection and quality control.

Description

Technical Field

[0001] This utility model relates to a force measuring device for a scissor-head type clamping knife, belonging to the field of medical device testing technology. Background Technology

[0002] Scissor-tipped clamping instruments are commonly used surgical tools, and accurate measurement of their clamping force is crucial for surgical safety and outcome. Currently, existing force detection devices for scissor-tipped clamping instruments are often complex in structure, inconvenient to operate, and lack high measurement accuracy, making real-time feedback of clamping force difficult. They typically use thin-film pressure sensors, which only provide force feedback when the clamp is fully closed, unable to measure force in a partially closed position; furthermore, these sensors are easily damaged after clamping and cannot measure clamping forces at the front, middle, and rear positions, or at micro-closed, semi-closed, and fully closed positions. The maximum clamping force of ultrasonic scalpel jaws is 20N±5N, and instability exists during force transmission, affecting the reliability of the detection results. Utility Model Content

[0003] The purpose of this invention is to provide a scissor-type clamping tool that can test force values ​​under different clamping conditions. The combination structure of the rocker and pressure sensor can more stably and reliably realize force value feedback, so as to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a scissor-head type clamping force measuring device, including a base, a force measuring mechanism on the base, the force measuring mechanism including a base, a fixing member, a rocker plate and a pressure sensor, the rocker plate is rotatably connected to the base, a rocker plate clamp is provided at one end of the rocker plate, and a pressure sensor is provided below the other end of the rocker plate and in contact with the pressure sensor, the pressure sensor is fixedly connected to the base, the fixing member is fixedly connected to the base and located above the rocker plate, the fixing member is provided with a fixing clamp adjacent to the position of the rocker plate clamp, in use, one end of the knife jaws is clamped on the fixing clamp, the other end is clamped on the rocker plate clamp, the rocker plate is pressed down by the clamping force of the knife jaws, and the pressure sensor obtains the test force value.

[0005] According to the above technical solution, the right side of the base is provided with a protrusion, and a fastener is fixedly connected above the protrusion.

[0006] According to the above technical solution, the distance from the contact point between the rocker and the pressure sensor to the center of rotation of the rocker is equal to the distance from the rocker clamp to the center of rotation of the rocker, and the rocker is rotatably connected to one side of the protrusion through a rotating shaft passing through the rocker.

[0007] According to the above technical solution, the fixing member is provided with a fixing member U-shaped groove, and a fixing clip is provided laterally at the opening of the fixing member U-shaped groove; the rocker plate is provided with a rocker plate U-shaped groove that is the same as the fixing member U-shaped groove, and a rocker plate clip is provided laterally at the opening of the rocker plate U-shaped groove.

[0008] According to the above technical solution, a groove is provided on the base, and when the rocker is raised, one end of the rocker is in the groove.

[0009] According to the above technical solution, a circular groove is provided on the front side of the base, and a through groove is provided on the front side of the circular groove, with the pressure sensor located inside the circular groove.

[0010] According to the above technical solution, two gun barrel supports are arranged side by side on the base. The gun barrel supports are located on the rear side of the force measuring mechanism, and gun barrel mounting grooves are provided on the gun barrel supports.

[0011] According to the above technical solution, the pressure sensor is a circular plate point pressure sensor, and the pressure sensor is connected to the force measuring instrument through a signal transmission line.

[0012] According to the above technical solution, when the tool jaws are closed, the rocker clamp and the fixed clamp are in a side-by-side position.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0014] This invention utilizes a lever-type structure incorporating a rocker arm and a pressure sensor to convert the clamping force of the jaws into a measurable pressure signal, thereby improving the accuracy and sensitivity of force detection. Because this invention converts the clamping force of the tool jaws into a pressure signal in real time, it can measure the clamping force at various positions (front, middle, and rear) of the jaws, as well as the clamping force at slightly closed, partially closed, and fully closed jaws.

[0015] This invention features a U-shaped groove structure with a fixed clamping piece and a rocker clamping piece horizontally aligned, ensuring stable tool installation, reliable force transmission, and avoiding offset or error during the measurement process.

[0016] This utility model, by setting up a gun barrel support and a groove structure, achieves rapid positioning of the tool and reasonable arrangement of the rocker's movement space, thereby improving the ease of operation and the compactness of the overall structure. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the force measuring mechanism of this utility model;

[0021] Figure 4 This is a cross-sectional view of the force measuring mechanism of this utility model;

[0022] Figure 5 This is a bottom view of the force measuring mechanism of this utility model.

[0023] In the diagram: 1. Base; 2. Gun barrel support; 21. Gun barrel mounting slot; 3. Force measuring mechanism; 31. Base; 311. Groove; 32. Protrusion; 33. Fixing component; 331. Fixing clip; 332. Fixing component U-shaped groove; 34. Rocker; 341. Rocker U-shaped groove; 342. Rocker clip; 35. Pressure sensor; 352. Signal transmission line. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] See Figures 1 to 5 The present invention provides a technical solution: a force measuring device for a scissor-head type clamping knife, characterized in that it includes a base 1, a force measuring mechanism 3 is provided on the base 1, the force measuring mechanism 3 includes a base 31, a fixing member 33, a rocker plate 34 and a pressure sensor 35, the rocker plate 34 is rotatably connected to the base 31, one end of the rocker plate 34 is provided with a rocker plate clamp 342, and the other end of the rocker plate 34 is provided with a pressure sensor 35 below it, the pressure sensor 35 is fixedly connected to the base 31, the fixing member 33 is fixedly connected to the base 31 and located above the rocker plate 34, the fixing member 33 is provided with a fixing clamp 331 adjacent to the rocker plate clamp 342, when in use, one end of the knife jaws is clamped on the fixing clamp 331 and the other end is clamped on the rocker plate clamp 342, the rocker plate (34) is pressed down by the clamping force of the knife jaws to obtain the test force value of the pressure sensor 35.

[0026] When the tool jaws are closed, the rocker clamp 342 and the fixed clamp 331 are in a side-by-side position.

[0027] In this embodiment, the pressure sensor 35 uses the RDF-8 circular plate point pressure sensor from Ruilide.

[0028] The base 31 has a protrusion 32 on the right side, a fastener 33 is fixedly connected above the protrusion 32, and a rocker 34 is provided below the fastener 33.

[0029] The distance from the contact point between the rocker 34 and the pressure sensor 35 to the center of rotation of the rocker is equal to the distance from the rocker clamp 342 to the center of rotation of the rocker. The rocker 34 is rotatably connected to one side of the protrusion 32 through a rotating shaft passing through the rocker 34.

[0030] The fastener 33 has a fastener U-shaped groove 332, and a fastening clip 331 is horizontally arranged at the opening of the fastener U-shaped groove 332; the rocker 34 has a rocker U-shaped groove 341 that is the same as the fastener U-shaped groove 332, and a rocker clip 342 is horizontally arranged at the opening of the rocker U-shaped groove 341.

[0031] The base 1 has a groove 311. When the rocker 34 is raised, one end of the rocker 34 is in the groove 311.

[0032] A circular groove is provided on the front side of the base 1, and a through groove is provided on the front side of the circular groove. A pressure sensor 35 is installed in the circular groove.

[0033] Two gun barrel supports 2 are equally spaced on the base 1. The gun barrel supports 2 are located behind the force measuring mechanism 3. Gun barrel supports 2 are provided with gun barrel mounting grooves 21.

[0034] Pressure sensor 35 is connected to signal transmission line 352. Signal transmission line 352 extends through a through slot to connect to the force measuring instrument. When rocker arm 34 is pressed down, pressure sensor 35 is triggered. Pressure sensor 35 transmits the force to the force measuring instrument through signal transmission line 352. The force measuring instrument records and outputs the downward pressure value. The force measuring instrument is the RDD-DS handheld force measuring instrument from RLD.

[0035] Working principle:

[0036] The operator places the gun barrel portion of the tool into the gun barrel mounting slots 21 on the two gun barrel supports on the base 1, completing the initial positioning of the tool. Before testing the tool, the front end of the rocker 34 is tilted upwards, not in contact with the pressure sensor 35, ensuring that it is in its initial state and the pressure sensor 35 is not under force. The groove 311 on the base 1 provides space for the downward pressing movement of the rear end of the rocker 34.

[0037] The operator grips the cutter handle, opening the jaws at the cutter's tip. The upper jaw of the cutter jaws presses against the fixing clip 331 on the fixing member 33. The fixing member 33 is fixedly connected to the base 31 via the protrusion 32, providing a stable fulcrum for the upper jaw. Simultaneously, the lower jaw of the clamp presses against the rocker clip 342 at the rear end of the rocker 34, applying an upward force to the rocker 34.

[0038] The rocker arm 34 is rotatably connected to the protrusion 32 via a connecting hole in the middle, forming a lever structure. When the lower clamp applies pressure to the rocker arm clamp 342, the rear end of the rocker arm 34 is pressed down, and according to the lever principle, its front end swings downward accordingly. This design converts the clamping force of the clamp into the downward pressure of the front end of the rocker arm 34 in a one-to-one ratio.

[0039] The front end of the rocker arm 34 moves downward and presses against the pressure sensor 35. The pressure sensor 35 transmits the applied pressure signal to an external force measuring instrument in real time via the signal transmission line 352.

[0040] After receiving the signal, the force measuring instrument processes it through an internal algorithm and displays the clamping force value of the tool jaws in real time, ensuring that the measurement results are accurate and intuitive.

[0041] The clamping force at the front, middle, and rear, as well as at the slightly closed, semi-closed, and fully closed positions, can be tested using a cutting tool.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A force measuring device for a scissor head type clamped tool, characterized in that, Includes a base (1), on which a force measuring mechanism (3) is provided. The force measuring mechanism (3) includes a base (31), a fixing member (33), a rocker (34), and a pressure sensor (35). The rocker (34) is rotatably connected to the base (31). One end of the rocker (34) is provided with a rocker clamp (342). The other end of the rocker (34) is provided with a pressure sensor (35) and is in contact with the pressure sensor (35). The pressure sensor (35) is fixedly connected. On the base (31), the fixing member (33) is fixedly connected to the base (31) and located above the rocker (34). The fixing member (33) is provided with a fixing clip (331) adjacent to the rocker clip (342). When in use, one end of the knife jaw is clamped on the fixing clip (331) and the other end is clamped on the rocker clip (342). Under the clamping force of the knife jaw, the rocker (34) presses down on the pressure sensor (35) to obtain the test force value.

2. A force measuring device for a scissor head type clamped tool according to claim 1, characterized in that The base (31) has a protrusion (32) on the right side, and a fastener (33) is fixedly connected above the protrusion (32).

3. The force measuring device for a scissor-head type clamping tool according to claim 2, characterized in that, The distance from the contact point between the rocker (34) and the pressure sensor (35) to the center of rotation of the rocker is equal to the distance from the rocker clamp (342) to the center of rotation of the rocker. The rocker (34) is rotatably connected to one side of the protrusion (32) through a rotating shaft passing through the rocker (34).

4. The force measuring device for a scissor-head type clamping tool according to claim 3, characterized in that, The fixing member (33) is provided with a fixing member U-shaped groove (332), and a fixing clip (331) is provided horizontally at the opening of the fixing member U-shaped groove (332); the rocker (34) is provided with a rocker U-shaped groove (341) that is the same as the fixing member U-shaped groove (332), and a rocker clip (342) is provided horizontally at the opening of the rocker U-shaped groove (341).

5. The force measuring device for a scissor-head type clamping tool according to claim 4, characterized in that, The base (1) has a groove (311) and when the rocker (34) is raised, one end of the rocker (34) is in the groove (311).

6. The force measuring device for a scissor-head type clamping tool according to claim 5, characterized in that, The base (1) has a circular groove on its front side, and a through groove is formed on the front side of the circular groove. The pressure sensor (35) is located inside the circular groove.

7. A force measuring device for a scissor-head type clamping tool according to claim 6, characterized in that, Two gun barrel supports (2) are arranged side by side on the base (1). The gun barrel supports (2) are located on the rear side of the force measuring mechanism (3). A gun barrel mounting groove (21) is provided on the gun barrel supports (2).

8. A force measuring device for a scissor-head type clamping tool according to claim 7, characterized in that, The pressure sensor (35) is a circular plate point pressure sensor, and the pressure sensor (35) is connected to the force measuring instrument through a signal transmission line (352).

9. A force measuring device for a scissor-head type clamping tool according to claim 1, characterized in that, When the tool jaws are closed, the rocker clamp (342) and the fixed clamp (331) are in a side-by-side position.

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