Endoscope angle lock torque test method and test tool

Abstract

The application discloses an endoscope angle lock torque testing method and testing tool. The testing method comprises the following steps: locking, rotating a first locking knob on a standard angle lock device and a second locking knob on a to-be-tested angle lock device, so that a first hand wheel of the standard angle lock device and a second hand wheel of the to-be-tested angle lock device are locked; installing, connecting the first locking knob with a first torque detection device and connecting the second locking knob with a second torque detection device; testing, driving the first hand wheel to rotate, so that the first torque detection device detects a first torque value, and driving the second hand wheel to rotate, so that the second torque detection device detects a second torque value; adjusting, when the second torque value is less than the first torque value, tightening the second locking knob; when the second torque value is greater than the first torque value, loosening the second locking knob; and checking, repeating the steps of installing, testing and adjusting until the second torque value obtained by testing is the same as the first torque value.

Description

Technical Field

[0001] This invention relates to the field of endoscopic torque testing technology, and in particular to an endoscope angle lock torque testing method and testing fixture. Background Technology

[0002] An endoscope is a medical device that can be inserted into the human body for disease diagnosis and treatment. The endoscope is equipped with a handwheel for adjusting the bending angle of the endoscope's curved section, and also has an angle lock knob for locking the angle handwheel. During the insertion of the endoscope, the bending angle of the curved section needs to be continuously adjusted so that the endoscope can observe the internal environment from all directions. When the endoscope reaches the location of the lesion, the angle lock knob is tightened to lock the bending angle of the curved section.

[0003] The angle lock knob and the angle handwheel have damping between them. The process of the angle lock knob locking the angle handwheel mainly involves increasing the damping between the two to limit the rotation of the handwheel. Torque testing is one of the routine failure analysis and testing items. To prevent product performance failure, it is necessary to periodically test and adjust the torque value of the endoscope angle lock knob. The torque value of the endoscope angle lock knob is the self-locking force between the angle lock knob and the angle handwheel. This torque value can reflect the tightness of maintaining the locking between the angle lock knob and the angle handwheel. Currently, the testing method is mostly manual. When adjusting the locking force, the magnitude of the locking force of the angle lock knob is judged by subjective feel. Moreover, different people have different standards of feel during adjustment, which is very unscientific and uncontrollable. This also leads to inconsistent locking feel for each handwheel and inaccurate control of torque value, which will affect the subsequent performance of the product. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a method for testing the torque of an endoscope angle lock, which combines testing fixtures to test and adjust the torque of the endoscope angle handwheel, quantifies the torque, and achieves the qualified standard.

[0005] The present invention also proposes a testing fixture.

[0006] According to a first aspect of the present invention, an endoscope angle locking torque testing method is performed using a testing fixture, the testing fixture including a second torque detection device, and the testing method includes the following steps: Obtain the first torque value of the standard angle lock device; To lock, rotate the second locking knob on the angle-to-be-tested locking device to lock all the second handwheels of the angle-to-be-tested locking device; Install by connecting the second locking knob to the second torque detection device; The test involves driving the second handwheel to rotate, causing the second torque detection device to detect the second torque value. Adjust the torque so that when the second torque value is less than the first torque value, tighten the second locking knob; when the second torque value is greater than the first torque value, loosen the second locking knob. Verify, repeat the installation, testing, and adjustment steps until the second torque value obtained by the test is the same as the first torque value, then the angle lock torque test of the angle lock device under test is completed.

[0007] According to an embodiment of the present invention, an endoscope angle lock torque testing method has at least the following beneficial effects: The second locking knob on the angle lock device under test is adjusted based on a comparison between the measured second torque value and the first torque value, causing the second handwheel to be locked or released. This adjustment is repeated cyclically until the measured second torque value is approximately equal to the first torque value. This quantifies the locking force of the second locking knob on the angle lock device under test, allowing for standardized, mass production, easy classification, and user convenience. It also facilitates verification during later stages.

[0008] According to some embodiments of the present invention, the first torque value includes an upper limit value of a first torque range and a lower limit value of a first torque range, wherein the upper limit value of the first torque range is 22 N·m and the lower limit value of the first torque range is 16 N·m; The second torque value is less than the first torque value, specifically, the second torque value is less than the lower limit of the first torque range; The second torque value is greater than the first torque value, specifically, the second torque value is greater than the upper limit of the first torque range; The second torque value is the same as the first torque value, specifically, the second torque value is greater than or equal to the lower limit of the first torque range and less than or equal to the upper limit of the first torque range.

[0009] According to some embodiments of the present invention, the test fixture includes a control device. When obtaining the first torque value of the standard angle lock device, the first torque value of the standard angle lock device is manually input through the control device. The second torque detection device is electrically connected to the control device, and the measured second torque value is directly input to the control device. The first torque value and the second torque value are compared in the control device. The manual input through the control device is convenient and quick.

[0010] According to some embodiments of the present invention, the testing fixture further includes a first torque detection device. When obtaining the first torque value of the standard angle locking device, the first locking knob on the standard angle locking device is rotated to lock the first handwheel of the standard angle locking device; then the first locking knob is connected to the first torque detection device; subsequently, the first handwheel is driven to rotate, so that the first torque detection device detects the first torque value. By setting the first torque detection device to detect the standard angle locking device as a reference, the second torque value of the second handwheel is then tested. Based on the comparison between the measured second torque value and the first torque value, the second locking knob on the angle locking device under test is adjusted so that the second handwheel is locked or loosened. This test and adjustment is repeated until the measured second torque value is approximately equal to the first torque value. This allows for the quantification of the locking force of the second locking knob on the angle locking device under test. During production, it allows for standardized, batch production, easy classification, and convenient user operation; it also facilitates verification during later stages.

[0011] According to some embodiments of the present invention, the testing fixture further includes a control device. The first torque detection device is electrically connected to the control device, and the first torque value measured by the first torque detection device is directly input to the control device. The testing method also uses a first driving device and a second driving device. Both the first driving device and the second driving device are electrically connected to the control device. When the measured second torque value is less than the first torque value, the control device controls the first driving device to tighten the second locking knob, then locks the position of the second locking knob, and then controls the second driving device to turn the second handwheel for testing. When the measured second torque value is greater than the first torque value, the control device controls the first driving device to loosen the second locking knob, then locks the position of the second locking knob, and then controls the second driving device to turn the second handwheel for testing. A testing fixture according to a second aspect embodiment of the present invention includes: The first torque detection device is used to detect the first torque value of the standard angle lock device; The second torque detection device is used to detect the second torque value of the angle lock device under test. Mounting base, both the first torque detection device and the second torque detection device are mounted on the mounting base; The first driving device is used to turn the second locking knob; The second drive mechanism is used to turn the second handwheel; The control device is mounted on the mounting base. Both the first torque detection device and the second torque detection device are electrically connected to the control device. Both the first drive device and the second drive device are electrically connected to the control device. The control device is used to receive and display the first torque value and the second torque value and compare them. If the second torque value is not equal to the first torque value, the control device will alarm. The control device compares the received first torque value and the second torque value, and controls the first drive device to turn the second locking knob and controls the second drive device to turn the second handwheel according to the comparison result. When the second torque value received by the control device is less than the first torque value, the control device first controls the first drive device to loosen the second locking knob, and then controls the second drive device to turn the second handwheel. When the second torque value received by the control device is less than the first torque value, the control device controls the first drive device to tighten the second locking knob, and then controls the second drive device to turn the second handwheel.

[0012] According to an embodiment of the present invention, a test fixture has at least the following beneficial effects: the dedicated test fixture for the angle lock device to be tested facilitates the testing of the second torque value by setting the first torque detection device and the second torque detection device as a control group, and the introduction of the first drive device, the second drive device and the control device facilitates automated testing.

[0013] According to some embodiments of the present invention, the second torque detection device includes: a column disposed on the mounting base; a support block connected to the column; a connecting frame hinged at one end to the support block; a first drive handle including a first handle portion and a first connecting portion, the first handle portion and the first connecting portion being connected in an L-shape, the other end of the connecting frame being hinged at the corner of the L-shape; a drive shaft slidably disposed on the support block in a vertical direction, one end of the drive shaft being hinged to the first connecting portion, the first drive handle being used to drive the drive shaft to move vertically up and down; a mounting block slidably disposed on the column in a vertical direction, the mounting block being connected to the other end of the drive shaft; a connector disposed on the mounting block; a torque detector detachably connected to the connector, the detection end of the torque detector being provided with a locking block, the locking block being used to lock the second locking knob; and a pawl rotatably connected to the torque detector, the pawl being used to rotate the second handwheel. The second torque detection device locks the angle lock device under test through a linkage mechanism for convenient testing. The mounting block can be driven to rise and fall by the first drive handle to facilitate pressing the angle lock device under test and to adapt to angle lock devices of different thicknesses. The torque detector is connected to the mounting block, concentrating the various components to facilitate the lightweighting and miniaturization of the second torque detection device. The locking block serves to fix the second locking knob, which allows the second locking knob to rotate relative to the second handwheel when the second handwheel is turned, so that the torque detector can measure the torque value.

[0014] According to some embodiments of the present invention, a receiving seat is further included, which is disposed on the mounting base and is used to accommodate the angle lock device to be measured.

[0015] According to some embodiments of the present invention, a clamping device is included, comprising: a mounting bracket disposed on the mounting base; a second drive handle including a second handle portion and a second connecting portion, the second handle portion being connected to the second connecting portion, the free end of the second connecting portion being hinged to the mounting bracket; a drive rod, one end of which is hinged to the mounting bracket, and the other end of which is connected to a pressure head for pressing the angle lock device to be tested; and a transmission link, one end of which is hinged to the second connecting portion, and the other end of which is hinged to the rod body of the drive rod. The clamping device and the pawl cooperate to ensure that the angle lock device to be tested is pressed down and will not tilt or tip over.

[0016] According to some embodiments of the present invention, the pressure head is detachably connected to the other end of the drive rod, and the pressure head is made of rubber to avoid damaging the angle lock device to be measured.

[0017] According to some embodiments of the present invention, the side wall of the mounting base is provided with heat dissipation holes.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the test fixture according to an embodiment of the present invention; Figure 2 for Figure 1 An exploded view of the test fixture is shown. Figure 3 This is a schematic diagram of the angle locking device to be tested; Figure 4 A schematic diagram of the first drive device and the second drive device; Figure 5 This is a schematic diagram of the control device.

[0020] Standard angle locking device 100, first locking knob 110, first handwheel 120; Test fixture 200, mounting base 210, heat dissipation hole 211, support leg 212, control device 220, first torque detection device 230; The components include: a second torque detection device 240, a column 241, a support block 242, a connecting frame 243, a first drive handle 244, a first handle part 244a, a first connecting part 244b, a drive shaft 245, a mounting block 246, a connector 247, a torque detector 248, a locking block 248a, and a pawl 249. Receiver 250, contour groove 251; The angle to be measured is locked by device 300, the second locking knob is locked by knob 310, and the second handwheel is locked by hand 320. The clamping device 400, the mounting bracket 410, the second drive handle 420, the second handle part 421, the second connecting part 422, the drive rod 430, the pressure head 431, and the transmission connecting rod 440 are included. Detailed Implementation Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0022] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0024] Reference Figures 1 to 5 An endoscope angle locking torque testing method is provided, which uses a testing fixture 200 for testing. The testing fixture 200 includes a second torque detection device 240. The testing method includes the following steps: Obtain the first torque value of the standard angle locking device 100; To lock, rotate the second locking knob 310 on the angle-to-be-tested locking device 300 so that the second handwheel 320 of the angle-to-be-tested locking device 300 is locked. Install by connecting the second locking knob 310 to the second torque detection device 240; The test drives the second handwheel 320 to rotate, causing the second torque detection device 240 to detect the second torque value. Adjustment: When the second torque value is less than the first torque value, tighten the second locking knob 310; when the second torque value is greater than the first torque value, loosen the second locking knob 310. Verify, repeat the installation, testing and adjustment steps until the second torque value obtained by the test is the same as the first torque value, then the angle lock torque test of the angle lock device 300 under test is completed.

[0025] In this implementation, the standard angle locking device 100 is used as a reference. The first torque value of the standard angle locking device is obtained and used as a reference value. The second torque value of the angle locking device under test is then tested. Based on the comparison between the second and first torque values, the second locking knob 310 on the angle locking device under test is adjusted, causing the second handwheel 320 to be locked or released. This process is repeated until the second torque value is approximately equal to the first torque value. This quantifies the locking force of the second locking knob 310 on the angle locking device under test. During production, this allows for standardized, mass production, easy classification, and user convenience. It also facilitates later verification. It is understood that the angle locking device under test 300 is mounted on the second torque detection device 240, and the testing fixture 200 is a dedicated testing fixture.

[0026] In some embodiments, the first torque value includes an upper limit value of a first torque range and a lower limit value of a first torque range; The second torque value is less than the first torque value, specifically, the second torque value is less than the lower limit of the first torque range; The second torque value is greater than the first torque value, specifically, the second torque value is greater than the upper limit of the first torque range; The second torque value is the same as the first torque value, specifically, the second torque value is greater than or equal to the lower limit of the first torque range and less than or equal to the upper limit of the first torque range; The upper limit of the first range is 22 N·m; the lower limit of the first torque range is 16 N·m.

[0027] In this embodiment, the first torque value is a standard torque value, and it is a range value with a minimum range value of 16 N·m and a maximum range value of 22 N·m. It can be understood that the first torque value is sample data obtained by detecting multiple standard angle locking devices. In practical use, the angle locking structure of an endoscope typically consists of a handwheel that controls the angle bending and a knob that limits the rotation of the handwheel. Rotation of the handwheel controls the bending of the endoscope's end section. By rotating the locking knob, the handwheel is locked, fixing the angle of the endoscope's end section and preventing it from bending back. The torque value of the angle locking device is used to characterize the degree of self-locking between the locking knob and the handwheel, not to characterize the force required to lock the handwheel. It reflects a locking effectiveness: whether the locking knob can effectively lock the handwheel when it is locked, and whether locking failure occurs. Under standard conditions, turning the locking knob will stop the handwheel from turning. When the torque value of the angle locking device is greater than the standard value, it indicates that the self-locking degree of the angle locking device is high and the connection relationship is strong. During use, the connection loss between the locking knob and the handwheel will increase continuously, thereby reducing the life of the angle locking device. When the torque value of the angle locking device is less than the standard value, it indicates that the self-locking degree of the angle locking device is low, and it also indicates that the connection relationship between the locking knob and the handwheel is not saturated. During use, slippage, the endoscope angle can still change after the handwheel is locked, and limit failure may occur.

[0028] It is understandable that during the assembly of various components of an endoscope product, due to the special nature of certain parts or errors caused by manual assembly, the torque values ​​of the locking knob and handwheel in the angle locking device may differ from the standard, thus requiring adjustment.

[0029] Understandably, the first torque value is the standard torque value, indicating that the installation structure between the angle knob and the handwheel in a standard angle lock is optimal. During operation, the angle knob can lock the handwheel well, without being too loose or completely locked. In testing, it is necessary to obtain the first torque value. This can be achieved by repeatedly testing sample angle locks. These sample angle locks are those with high user satisfaction ratings. To ensure the validity of the test data, multiple sample angle locks can be tested to obtain the standard torque value.

[0030] For endoscopes, the internal installation structure of the angle lock varies, and the torque value to be tested also varies. The torque testing method in this embodiment is applicable to endoscope products equipped with a single handwheel, and can also be applied to endoscope products equipped with two handwheels.

[0031] Understandably, for products with a single handwheel configuration, the reference patent for the angle locking device 300 under test, CN217310223U, entitled "Endoscope Angle Locking Mechanism," describes the structure of the angle locking device 300 under test, the second locking knob 310, and the second handwheel 320. The second locking knob 310 is located at the upper end of the second handwheel 320. For products with a single handwheel structure, through continuous testing, the optimal standard torque value is 18 N·m, with an allowable testing error of ±2 N.

[0032] It is understandable that, for products with two handwheels, the angle-to-be-tested locking device 300 refers to the patent publication CN206120286U, entitled "A Medical Endoscope Control Mechanism." The handwheel assembly and locking assembly described therein are the second handwheel 320 and the second locking knob 310 of the angle-to-be-tested locking device 300. In the patent document, the first handwheel assembly is located below the second handwheel assembly, the first locking assembly is located at the lower end of the first handwheel assembly, and the second locking assembly is located at the upper end of the second handwheel assembly. Corresponding to this two-handwheel structure product, the upper limit of the first torque range in this embodiment corresponds to the torque value between the first handwheel assembly and the first locking assembly located relatively below (in the patent document), with a preferred value of 20 N·m and an error torque value of ±2 N·m. The lower limit of the first torque range in this embodiment corresponds to the torque value between the second handwheel assembly and the second locking assembly located relatively above (in the patent document), with a preferred value of 18 N·m and an error torque value of ±2 N.

[0033] In some embodiments, the test fixture 200 includes a control device 220. When acquiring the first torque value of the standard angle lock device 100, the first torque value of the standard angle lock device 100 is manually input through the control device 220. The second torque detection device 240 is electrically connected to the control device 220, and the measured second torque value is directly input to the control device 220. The first torque value and the second torque value are compared in the control device 220. Based on the comparison result of the first torque value and the second torque value, the torque value of the angle lock device under test is adjusted. In this embodiment, the torque value is manually input through the control device 220, which is convenient and quick. In some embodiments, the test fixture 200 also includes a first torque detection device 230. When acquiring the first torque value of the standard angle lock device, the first locking knob 110 on the standard angle lock device 100 is rotated to lock the first handwheel 120 of the standard angle lock device 100. Then, the first locking knob 110 is connected to the first torque detection device 230. After that, the first handwheel 120 is driven to rotate, so that the first torque detection device 230 detects the first torque value.

[0034] In some embodiments, the first torque detection device 230 is electrically connected to the control device 220. The first torque value measured by the first torque detection device 230 is directly input to the control device 220. The testing method also uses a first drive device and a second drive device, both of which are electrically connected to the control device 220. When the measured second torque value is less than the first torque value, the control device 220 controls the first drive device to tighten the second locking knob 310, then locks the position of the second locking knob 310, and then controls the second drive device to turn the second handwheel 320 for testing. When the measured second torque value is greater than the first torque value, the control device 220 controls the first drive device to loosen the second locking knob 310, then locks the position of the second locking knob 310, and then controls the second drive device to turn the second handwheel 320 for testing. Automation is achieved by introducing the first drive device, the second drive device, and the control device 220. The control device 220 can be a smart device such as a computer or tablet computer. A testing fixture includes: a first torque detection device 230 for detecting a first torque value of a standard angle locking device 100; a second torque detection device 240 for detecting a second torque value of an angle locking device 300 to be tested; a mounting base 210 on which both the first torque detection device 230 and the second torque detection device 240 are mounted; a first drive device for turning a second locking knob 310; a second drive device for turning a second handwheel 320; and a control device 220 mounted on the mounting base 210. Both the first torque detection device 230 and the second torque detection device 240 are electrically connected to the control device 220, and both the first drive device and the second drive device are electrically connected to the control device. The control device 220 is used to receive and display the first torque value and... The control device 220 compares the received first torque value with the second torque value. If the second torque value is not equal to the first torque value, the control device 220 will sound an alarm. The control device 220 compares the received first torque value with the second torque value and controls the first drive device to turn the second locking knob 310 and the second drive device to turn the second handwheel 320 according to the comparison result. When the second torque value received by the control device 220 is less than the first torque value, the control device 220 first controls the first drive device to loosen the second locking knob 310 and then controls the second drive device to turn the second handwheel 320. When the second torque value received by the control device 220 is less than the first torque value, the control device 220 controls the first drive device to tighten the second locking knob 310 and then controls the second drive device to turn the second handwheel 320.

[0035] In some embodiments, the dedicated testing fixture for the angle locking device 300 under test uses a first torque detection device 230 and a second torque detection device 240 as control groups to facilitate the testing of the second torque value. Furthermore, the introduction of a first drive device, a second drive device, and a control device 220 facilitates automation. It is understood that the first and second drive devices are primarily for driving the corresponding second locking knob 310 and second handwheel 320 to rotate. The first drive device driving the second locking knob 310 to rotate adjusts the tightness between the second locking knob 310 and the second handwheel 320. During the test, the second drive device drives the second handwheel 320 to rotate at a uniform speed in one direction to obtain the torque value of the angle locking device under test. The first and second drive devices can be robotic arms, electric motors, or various power devices capable of outputting torque. As for how to use an electric motor to drive the second locking knob 310 and the second handwheel 320 to rotate, conventional shift forks, gear drives, belt drives, or chain drives can be used.

[0036] In some embodiments, the test fixture 200 is provided with a control device 220 to obtain the first torque value of the standard angle locking device. The first torque value can be input through the control device 220.

[0037] Reference Figures 1 to 3 The present invention provides a structure for a control device and a first drive device and a second device. The control device 220 includes a display, an alarm device, and a processing device internally configured. The display, alarm device, and processing device are all electrically connected. The display has an interactive interface and an operation interface. The display is also electrically connected to a first torque testing device and a second torque testing device. The first drive device and the second drive device are controlled through the operation interface. The first torque value can be input through the interactive interface and can be transmitted to the display for display. After the processing device obtains the first torque value, it locks the second handwheel and drives the second drive device to rotate the second handwheel to test and obtain the second torque value. The second torque value can be transmitted to the display for display. The alarm module is used to determine the magnitude of the first torque value and the second torque value. When the second torque value is different from the first torque value, the alarm module sounds an alarm. The processing device then drives the first drive device to turn the locking knob.

[0038] It is understood that the alarm device can be configured as either an audible alarm or a sound and light alarm. In some embodiments, the alarm device can be configured with three indication modes, corresponding to the comparison results between the second torque value and the first torque value. Specifically, three indicator lights are used to represent the comparison results of the first torque value and the second torque value. When the second torque value is the same as the first torque value, a green light is used; when the second torque value is greater than the first torque value, a red light is used; and when the second torque value is less than the first torque value, a blue light is used. The color setting of the indicator lights is not limited, and other colors that can distinguish the three comparison results can also be used.

[0039] It is understandable that "loosening" and "tightening" refer to the rotation direction of the locking knob, that is, "loosening" and "tightening" as commonly understood.

[0040] In some embodiments, during the installation process, the first locking knob 110 is fixedly connected to the first torque detection device 230, and the second locking knob 310 is fixedly connected to the second torque detection device 240. This ensures that the second locking knob 310 does not rotate with the second handwheel 320, allowing the second torque detection device 240 to measure the second torque value. It is understood that the standard angle lock device 100 is a separate device, excluding the handle, and serves as a reference for testing. The first locking knob 110 is directly connected to the first torque detection device 230, and manually rotating the first handwheel 120 records the standard first torque value on the control device 220.

[0041] Understandably, when the handwheel is locked, both the locking knob and the handwheel are in a relatively stationary state. The locking knob is fixedly connected to a torque testing device. During testing, the handwheel is rotated at a constant speed. However, because the locking knob has a limiting effect on the handwheel, it needs to prevent the handwheel from rotating. During the rotation test, when the forces (including friction) between the two are overcome, the handwheel will rotate. To maintain the relative stationary position of the locking knob and the handwheel, the locking knob tends to rotate, and this tendency is fed back to the torque testing device. The force measured by the torque testing device is the torque value. It should be noted that in actual operation, as the handwheel is rotated, the torque value will gradually stabilize, thus obtaining the test value. In some embodiments, the second torque detection device 240 includes: a column 241 mounted on a mounting base 210; a support block 242 connected to the column 241; a connecting frame 243 hinged at one end to the support block 242; a first drive handle 244 including a first handle portion 244a and a first connecting portion 244b, the first handle portion 244a and the first connecting portion 244b being connected in an L-shape, and the other end of the connecting frame 243 being hinged at the corner of the L-shape; and a drive shaft 245 slidably mounted vertically on the support block 242, one end of the drive shaft 245 being hinged to the first connecting portion 244a. b. The first drive handle 244 is used to drive the drive shaft 245 to move vertically up and down; the mounting block 246 is slidably mounted on the column 241 vertically, and the mounting block 246 is connected to the other end of the drive shaft 245; the connector 247 is mounted on the mounting block 246; the torque detector 248 is detachably connected to the connector 247, and the detection end of the torque detector 248 is provided with a locking block 248a, which is used to lock the second locking knob 310; the pawl 249 is rotatably connected to the torque detector 248, and the pawl 249 is used to turn the second handwheel 320. The second torque detection device 240 locks the angle lock device 300 under test through a linkage mechanism for convenient testing. The mounting block 246 can be driven to rise and fall by the first drive handle 244 to facilitate pressing the angle lock device 300 under test and to accommodate angle lock devices 300 of different thicknesses. The torque detector 248 is connected to the mounting block 246, concentrating the various components and facilitating the weight reduction and miniaturization of the second torque detection device 240. It should be noted that the connector 247 is a commonly used mechanical connector, such as a screw-locking mechanism connector for fire water pipes or a quick coupling. The torque detector 248 is a common torque detector, the main component of which is a torque sensor. The locking block 248a serves to fix the second locking knob 310, so that when the second handwheel 320 is turned, the second locking knob 310 can rotate relative to the second handwheel 320, allowing the torque detector 248 to measure the torque value.Understandably, when the locking block 248a secures the second locking knob 310, the second handwheel 320 can be rotated by manually driving the pawl 249 or by using the second drive device. Without any external force restricting the second locking knob 310, the rotation of the second handwheel 320 can synchronously rotate the second locking knob 310. However, because the second locking knob 310 is restricted by the locking block 248a, which is also restricted by the torque detector 248, the second locking knob 310 provides resistance to the second handwheel 320 when it is rotated. The source of this resistance is the locking block 248a, which is part of the torque detector 248. The torque detector 248 can detect the resistance provided by the second locking knob 310 to the second handwheel 320 through the reaction force. This resistance value is the second torque value. Understandably, the lower end of the locking block 248a is provided with a latch, which can lock the protrusion of the second locking knob 310.

[0042] In some embodiments, a receiving seat 250 is also included, which is disposed on the mounting base 210 and is used to accommodate the angle locking device 300 to be tested. It is understood that the receiving seat 250 serves to provide height, i.e., a pad, and also serves to mount the angle locking device 300 to be tested and prevent the angle locking device 300 to be tested from shaking.

[0043] In some embodiments, a clamping device 400 is included, comprising: a mounting bracket 410 disposed on a mounting base 210; a second drive handle 420 including a second handle portion 421 and a second connecting portion 422, the second handle portion 421 being connected to the second connecting portion 422, the free end of the second connecting portion 422 being hinged to the mounting bracket 410; a drive rod 430, one end of which is hinged to the mounting bracket 410, and the other end of which is connected to a pressure head 431, the pressure head 431 being used to press the angle lock device 300 to be tested; and a transmission link 440, one end of which is hinged to the second connecting portion 422, and the other end of which is hinged to the rod body of the drive rod 430. The clamping device 400 cooperates with the pawl 570 to prevent the angle lock device 300 to be tested from tilting up.

[0044] In some embodiments, the pressure head 431 is detachably connected to the other end of the drive rod 430. The pressure head 431 is made of rubber to avoid damaging the angle lock device 300 to be measured.

[0045] In some embodiments, the receiving seat 250 is provided with a contour groove 251, which is used to accommodate the angle locking device 300 to be measured.

[0046] In some embodiments, the side wall of the mounting base 210 is provided with heat dissipation holes 211.

[0047] In some embodiments, the lower end of the mounting base 210 is provided with a support leg 212.

[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An endoscope angle lock torque testing method, characterized by, The test is performed using a test fixture (200), which includes a second torque detection device (240). The test method includes the following steps: Obtain the first torque value of the standard angle locking device (100); Locking: Rotate the second locking knob (310) on the angle-to-be-tested locking device (300) to lock the second handwheel (320) of the angle-to-be-tested locking device (300); Installation: Connect the second locking knob (310) to the second torque detection device (240). Test, drive the second handwheel (320) to rotate, so that the second torque detection device (240) detects the second torque value; Adjustment: when the second torque value is less than the first torque value, tighten the second locking knob (310); when the second torque value is greater than the first torque value, loosen the second locking knob (310). Verify, repeat the installation, testing and adjustment steps until the second torque value obtained by the test is the same as the first torque value, then the angle lock torque test of the angle lock device (300) to be tested is completed; The test fixture (200) includes a first torque detection device (230) and a control device (220). The first torque detection device (230) is electrically connected to the control device (220). The first torque value measured by the first torque detection device (230) is directly input to the control device (220). The test method also uses a first drive device and a second drive device. Both the first drive device and the second drive device are electrically connected to the control device (220). When the measured second torque value is less than the lower limit of the first torque value range, the control device (220) controls the first drive device. The device tightens the second locking knob (310), then locks the position of the second locking knob (310), and then the control device (220) controls the second drive device to turn the second handwheel (320) for testing; when the measured second torque value is greater than the upper limit of the first torque value, the control device (220) controls the first drive device to loosen the second locking knob (310), then locks the position of the second locking knob (310), and then the control device (220) controls the second drive device to turn the second handwheel (320) for testing.

2. The method for testing the angle locking torque of an endoscope according to claim 1, characterized in that, The first torque value includes an upper limit value of a first torque range and a lower limit value of a first torque range. The upper limit value of the first torque range is 22 N·m, and the lower limit value of the first torque range is 16 N·m. The second torque value is less than the first torque value, specifically, the second torque value is less than the lower limit of the first torque range; The second torque value is greater than the first torque value, specifically, the second torque value is greater than the upper limit of the first torque range; The second torque value is the same as the first torque value, specifically, the second torque value is greater than or equal to the lower limit of the first torque range and less than or equal to the upper limit of the first torque range.

3. The method of claim 2, wherein the method further comprises: The test fixture (200) includes a control device (220). When obtaining the first torque value of the standard angle lock device (100), the first torque value of the standard angle lock device (100) is manually input through the control device (220). The second torque detection device (240) is electrically connected to the control device (220). The measured second torque value is directly input to the control device (220). The first torque value and the second torque value are compared in the control device (220).

4. The method for testing the angle locking torque of an endoscope according to claim 2, characterized in that: When obtaining the first torque value of the standard angle locking device (100), the first locking knob (110) on the standard angle locking device (100) is rotated to lock the first handwheel (120) of the standard angle locking device (100); then the first locking knob (110) is connected to the first torque detection device (230); thereafter, the first handwheel (120) is driven to rotate so that the first torque detection device (230) detects the first torque value.

5. A testing fixture, applied to an endoscope angle locking torque testing method, characterized in that, include: The first torque detection device (230) is used to detect the first torque value of the standard angle lock device (100); The second torque detection device (240) is used to detect the second torque value of the angle lock device (300) to be tested; Mounting base (210), the first torque detection device (230) and the second torque detection device (240) are both mounted on the mounting base (210); The first drive device is used to turn the second locking knob (310). The second drive unit is used to turn the second handwheel (320). A control device (220) is mounted on a mounting base (210). The first torque detection device (230) and the second torque detection device (240) are both electrically connected to the control device (220). The first drive device and the second drive device are both electrically connected to the control device. The control device (220) is used to receive and display the first torque value and the second torque value and compare them. When the second torque value is not equal to the first torque value, the control device (220) will sound an alarm. The control device (220) compares the received first torque value and the second torque value, and controls the first drive device to turn the second locking knob (310) according to the comparison result, and controls the second drive device to turn the second handwheel (320). When the second torque value received by the control device (220) is greater than the first torque value, the control device (220) first controls the first drive device to loosen the second locking knob (310), and then controls the second drive device to turn the second handwheel (320). When the second torque value received by the control device (220) is less than the first torque value, the control device (220) controls the first drive device to tighten the second locking knob (310), and then controls the second drive device to turn the second handwheel (320).

6. A test fixture according to claim 5, wherein, The second torque detection device (240) includes: A column (241) is mounted on the mounting base (210); Support block (242) is connected to the column (241); The connecting frame (243) is hinged to the support block (242) at one end. The first drive handle (244) includes a first handle portion (244a) and a first connecting portion (244b), the first handle portion (244a) and the first connecting portion (244b) are connected to form an L-shape, and the other end of the connecting frame (243) is hinged at the corner of the L-shape; A drive shaft (245) is slidably mounted on the support block (242) in a vertical direction. One end of the drive shaft (245) is hinged to the first connecting part (244b). The first drive handle (244) is used to drive the drive shaft (245) to move up and down in a vertical direction. Mounting block (246) is slidably mounted on the column (241) in a vertical direction, and the mounting block (246) is connected to the other end of the drive shaft (245); A connector (247) is disposed on the mounting block (246); Torque detector (248) is detachably connected to the connector (247). The detection end of the torque detector (248) is provided with a locking block (248a), which is used to lock the second locking knob (310). A pawl (249) is rotatably connected to the torque detector (248) and is used to turn the second handwheel (320).

7. A test fixture according to claim 6, wherein: It also includes a receiving seat (250) disposed on the mounting base (210) for accommodating the angle lock device (300) to be measured.

8. The test fixture of claim 6, wherein, Includes a clamping device (400), said clamping device (400) comprising: Mounting bracket (410) is disposed on the mounting base (210); The second drive handle (420) includes a second handle portion (421) and a second connecting portion (422), wherein the second handle portion (421) is connected to the second connecting portion (422), and the free end of the second connecting portion (422) is hinged to the mounting bracket (410); The drive rod (430) is hinged to the mounting bracket (410) at one end and connected to a pressure head (431) at the other end. The pressure head (431) is used to press the angle lock device (300) to be measured. The pressure head (431) is detachably connected to the other end of the drive rod (430). The transmission link (440) is hinged at one end to the second connecting part (422), and the other end of the transmission link (440) is hinged to the rod body of the drive rod (430).

9. A test fixture according to claim 8, wherein: The mounting base (210) has heat dissipation holes (211) on its side wall.

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