Pinching force testing device for microscopic tweezers

Abstract

The utility model relates to a pinching force testing device of microscopic tweezers, the microscopic tweezers comprise a first clamping arm and a second clamping arm, one end of the first clamping arm in the length direction and one end of the second clamping arm in the length direction are close to each other and are connected with each other to form a tweezers handle, and the pinching force testing device comprises a positioning mechanism, a thrust testing mechanism and a movement mechanism, the positioning mechanism is detachably connected with the tweezers handle in an inserted mode, the thrust testing mechanism abuts against the side, away from the second clamping arm, of the first clamping arm to make contact with the first clamping arm and test the counter-acting force of the first clamping arm, and the movement mechanism is used for driving the thrust testing mechanism and the first clamping arm to be close to each other or away from each other. According to the pinching force testing device of the microscopic tweezers, the positioning mechanism is arranged and used for being detachably connected with the tweezers handle of the microscopic tweezers in an inserted mode, the microscopic tweezers can be positioned, then the pinching force of the microscopic tweezers is tested through the thrust testing mechanism, and the accuracy of the pinching force testing result of the microscopic tweezers is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical instruments, in particular to a kneading force testing device for micro forceps. Background Art

[0002] Microtweezers need to be operated with high precision during microsurgery while avoiding damage to surrounding tissues. Therefore, clinical practice has high requirements for the performance of microtweezers, including the pinching force. By testing the pinching force of tweezers, the production process can be quality controlled to ensure that the pinching force of each tweezer produced is within the specified range. It also helps to ensure the consistency and reliability of the product and ensure that patients will not be harmed when using it.

[0003] The Chinese utility model patent with the authorization announcement number CN202693163U discloses a kneading force test device, including a bottom plate and a dynamometer placed on the bottom plate, the bottom plate is provided with a linear bearing block arranged parallel to the dynamometer, the dynamometer is placed on the linear bearing block through a fixed plate, and one side of the dynamometer is provided with a test seat placed on the bottom plate. In the above utility model, the micro tweezers are placed in the slot of the test seat, and the slot is a step, so the micro tweezers cannot be positioned, resulting in inaccurate test results. Utility Model Content

[0004] To this end, the utility model provides a device for testing the pinching force of micro tweezers, which can quickly position the micro tweezers, thereby ensuring the accuracy of the test result of the pinching force of the micro tweezers.

[0005] In order to solve the above technical problems, the utility model provides a pinching force testing device for microscopic tweezers, wherein the microscopic tweezers include a first clamping arm and a second clamping arm, one end of the first clamping arm in the length direction and one end of the second clamping arm in the length direction are close to each other and connected to each other to form a tweezers handle, the other end of the first clamping arm in the length direction is a first arm end, and the other end of the second clamping arm in the length direction is a second arm end, and the first arm end and the second arm end can be close to each other and away from each other;

[0006] The pinching force testing device includes a positioning mechanism, a thrust testing mechanism and a motion mechanism. The positioning mechanism is detachably plugged into the tweezers handle, the thrust testing mechanism abuts against the side of the first clamping arm facing away from the second clamping arm to contact and test the reaction force received by the first clamping arm, and the motion mechanism is used to drive the thrust testing mechanism and the microtweezers to move closer to and away from each other.

[0007] Further, the positioning mechanism includes a mounting block, a pressing block, and a spring plunger. The mounting block has a mounting surface, on which a positioning groove is provided. The positioning groove has a first groove end and a second groove end. The first groove end is an open end, and the tweezer handle can be inserted into the positioning groove from the first groove end. The pressing block is arranged on the side of the mounting surface of the mounting block. The pressing block has a pressing surface opposite to the mounting surface. The spring plunger is connected to the pressing block and protrudes from the pressing surface. The spring plunger is used to press the tweezer handle against the bottom of the positioning groove.

[0008] Further, the groove width dimension of the first groove end gradually increases in the direction away from the second groove end.

[0009] Further, the second groove end is closed.

[0010] Further, the tweezer handle is inserted into the positioning groove in the direction away from the first arm end and the second arm end.

[0011] Further, a plurality of spring plungers are provided.

[0012] Further, the thrust testing mechanism is a thrust gauge, which includes a housing and a push rod connected to the housing. The push rod abuts against the first clamping arm.

[0013] Further, the thrust testing mechanism is mounted on the moving mechanism, and the moving mechanism drives the thrust testing mechanism to approach and move away from the first clamping arm.

[0014] Further, the moving mechanism is an electric linear module. The pinch force testing device further includes a control box, which includes a start button for controlling the start of the electric linear module and an end button for controlling the stop of the electric linear module.

[0015] Further, the pinch force testing device further includes a substrate, and the positioning mechanism, the thrust testing mechanism, and the moving mechanism are mounted on the same substrate.

[0016] The above technical solution of the present invention has the following advantages compared with the prior art: For the pinch force testing device of the micro forceps of the present invention, by setting a positioning mechanism, which is used for detachably plugging and connecting the tweezer handle of the micro forceps, the micro forceps can be positioned, and then the pinch force of the micro forceps is tested by the thrust testing mechanism, ensuring the accuracy of the pinch force test result of the micro forceps. Description of the Drawings

[0017] In order to make the content of the present invention easier to be clearly understood, the present invention will be further described in detail below according to the specific embodiments of the present invention in conjunction with the drawings.

[0018] Figure 1 It is a working schematic diagram of the pinching force testing device of the micro tweezers in the utility model;

[0019] Figure 2 It is a three-dimensional diagram of the installation block in the utility model;

[0020] Figure 3 It is a schematic diagram of the installation surface in the utility model;

[0021] Figure 4 It is a schematic diagram of the connection between the clamping block and the spring plunger in the utility model.

[0022] Explanation of the reference numerals in the figure in the specification: 1. Microtweezers; 11. First clamping arm; 12. Second clamping arm; 2. Positioning mechanism; 21. Mounting block; 22. Pressing block; 23. Spring plunger; 24. Positioning slot; 241. First slot end; 242. Second slot end; 3. Thrust test mechanism; 31. Housing; 32. Push rod; 4. Moving mechanism; 5. Control box; 51. Start button; 52. End button; 6. Substrate. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0024] See also Figures 1 to 4 As shown, an embodiment of the pinching force testing device of the micro forceps in the utility model.

[0025] The microscopic forceps 1 comprises a first clamping arm 11 and a second clamping arm 12, one end of the first clamping arm 11 in the length direction and one end of the second clamping arm 12 in the length direction are close to each other and connected to each other to form a forceps handle, the other end of the first clamping arm 11 in the length direction is a first arm end, and the other end of the second clamping arm 12 in the length direction is a second arm end, and the first arm end and the second arm end can be close to each other and away from each other;

[0026] The above-mentioned pinching force testing device includes a positioning mechanism 2, a thrust testing mechanism 3 and a moving mechanism 4. The above-mentioned positioning mechanism 2 is detachably plugged into the above-mentioned tweezers handle, the above-mentioned thrust testing mechanism 3 abuts against the side of the above-mentioned first clamping arm 11 away from the above-mentioned second clamping arm 12 to contact and test the reaction force of the above-mentioned first clamping arm 11, and the above-mentioned moving mechanism 4 is used to drive the above-mentioned thrust testing mechanism 3 and the above-mentioned first clamping arm 11 to move closer to and away from each other.

[0027] The above-mentioned micro forceps 1 has an elastic structure. Under the action of an external force, the micro forceps 1 can be deformed, that is, the first arm end of the first clamping arm 11 and the second arm end of the second clamping arm 12 can approach and move away from each other. When the external force is removed, under the elastic action of the micro forceps 1 itself, the micro forceps 1 resumes its shape. During use, after a medical staff member pinches the first clamping arm 11 and the second clamping arm 12, the angle between the first clamping arm 11 and the second clamping arm 12 becomes smaller. When the medical staff member reduces the force applied to the first clamping arm 11 and the second clamping arm 12, the angle between the first clamping arm 11 and the second clamping arm 12 becomes larger. The self-elastic force of the micro forceps 1 should be within a suitable range, and a pinch force test needs to be carried out. When carrying out the pinch force test, first insert the forceps handle of the micro forceps 1 into the positioning mechanism so that the first clamping arm 11 is located between the second clamping arm 12 and the thrust test mechanism 3, and then drive the micro forceps 1 and the thrust test mechanism 3 to approach each other through the movement mechanism 4 until the angle between the first clamping arm 11 and the second clamping arm 12 is the set angle. At this time, if the test result of the thrust test mechanism 3 is within the set range, the pinch force test of the micro forceps 1 is qualified; if the test result of the thrust test mechanism 3 is not within the set range, the pinch force test of the micro forceps 1 is unqualified. The above-mentioned positioning mechanism 2 is used for detachably plugging and connecting the forceps handle of the micro forceps 1, can position the micro forceps 1, and then test the pinch force of the micro forceps through the thrust test mechanism 3 to ensure the accuracy of the pinch force test result of the micro forceps 1.

[0028] Further, the above-mentioned positioning mechanism 2 includes a mounting block 21, a pressing block 22, and a spring plunger 23. The above-mentioned mounting block 21 has a mounting surface, and a positioning groove 24 is provided on the mounting surface. The positioning groove 24 has a first groove end 241 and a second groove end 242. The first groove end 241 is an open end, and the forceps handle can be inserted into the positioning groove 24 from the first groove end 241. The pressing block 22 is provided on the side of the mounting surface of the mounting block 21. The pressing block 22 has a pressing surface opposite to the mounting surface. The spring plunger 23 is connected to the pressing block 22 and protrudes from the pressing surface. The spring plunger 23 is used to press the forceps handle against the bottom of the positioning groove 24.

[0029] The above-mentioned mounting block 21 and the above-mentioned pressing block 22 are both block-shaped rigid bodies. The notch of the above-mentioned positioning groove 24 penetrates the mounting surface of the mounting block 21. The bottom of the above-mentioned positioning groove 24 faces the notch, and the groove walls of the above-mentioned positioning groove 24 are located on both sides of the bottom. After the tweezer handle of the micro forceps 1 is inserted into the positioning groove, it contacts the groove walls of the positioning groove 24. The above-mentioned spring plunger 23 is also called a ball head plunger, or a positioning bead / plug. A spring is installed inside the screw thread, and the pre-tightening force is adjusted by controlling the screwing depth to achieve the positioning function. When the tweezer handle of the micro forceps 1 is inserted into and pulled out from the positioning groove 24, it overcomes the elastic force of the spring plunger 23. When the tweezer handle of the micro forceps 1 is in the positioning groove 24, under the elastic force of the spring plunger 23, the tweezer handle of the micro forceps 1 contacts the bottom of the positioning groove 24. Through the above-mentioned positioning mechanism, not only can the tweezer handle of the micro forceps 1 be reliably positioned, but also the tweezer handle of the micro forceps 1 can be quickly inserted into the positioning groove 24 and can be quickly pulled out from the positioning groove 24.

[0030] In this embodiment, the groove width dimension of the above-mentioned first groove end 241 gradually increases in the direction away from the above-mentioned second groove end 242.

[0031] Since the tweezer handle of the micro forceps 1 contacts the groove walls of the positioning groove 24 after being inserted into the positioning groove, the groove width of the positioning groove 24 is approximately the same as the dimension of the tweezer handle of the micro forceps 1 in the groove width direction, resulting in that it is very difficult for the tweezer handle of the micro forceps 1 to align with the first groove end 241 and then enter the positioning groove 24. Therefore, the first groove end 241 is set as a flared opening to guide the tweezer handle of the micro forceps 1 into the positioning groove 24, facilitating the quick insertion of the tweezer handle of the micro forceps 1 into the positioning groove 24.

[0032] In this embodiment, the above-mentioned second groove end 242 is closed.

[0033] The second groove end 242 is closed, that is, after the tweezer handle of the micro forceps 1 is inserted into the positioning groove 24, it contacts the second groove end 242 of the positioning groove 24, making the relative position relationship between the micro forceps 1 and the thrust testing mechanism 3 more accurate.

[0034] In this embodiment, the above-mentioned tweezer handle is inserted into the above-mentioned positioning groove 24 in the direction away from the above-mentioned first arm end and the second arm end.

[0035] The bottom area of the positioning groove 24 is larger than the groove wall area of the positioning groove 24, and the groove wall area of the positioning groove 24 is larger than the areas of the first groove end 241 and the second groove end 242. Therefore, it can be ensured that the contact area between the tweezer handle of the micro forceps and the positioning groove 24 is as large as possible. Similarly, the tweezer handle of the micro forceps 1 is pulled out from the above-mentioned positioning groove 24 in the direction towards the above-mentioned first arm end and the second arm end.

[0036] In this embodiment, the above-mentioned spring plunger 23 is provided in multiple numbers.

[0037] The spring plungers 23 are provided in a plurality, that is, the spring plungers 23 can abut against multiple positions of the tweezer handle of the micro forceps 1, thereby improving the positioning effect of the spring plungers 23.

[0038] In this embodiment, the thrust testing mechanism 3 is a thrust gauge. The thrust gauge includes a housing 31 and a push rod 32 connected to the housing 31. The push rod 32 abuts against the first clamping arm 11.

[0039] The basic principle of the thrust gauge is to measure the magnitude of force by using the elongation or contraction of a spring. When an external force acts on the spring, the spring deforms, causing its length to change. This change in length is proportional to the magnitude of the external force. The magnitude of the thrust received is determined by measuring the change in the length of the spring.

[0040] In this embodiment, the thrust testing mechanism 3 is mounted on the motion mechanism 4, and the motion mechanism 4 drives the thrust testing mechanism 3 to approach and move away from the first clamping arm 11.

[0041] By moving the thrust testing mechanism 3 while the micro forceps 1 remain stationary, the mutual approach and separation of the micro forceps and the thrust testing mechanism are achieved, and the overall structure and layout of the pinch force testing device are more reasonable.

[0042] In this embodiment, the motion mechanism 4 is an electric linear module. The pinch force testing device further includes a control box 5. The control box 5 includes a start button 51 for controlling the start of the electric linear module and an end button 52 for controlling the stop of the electric linear module.

[0043] When the start button 51 is pressed, the electric linear module drives the micro forceps 1 and the thrust testing mechanism 3 to approach each other. When the angle between the first clamping arm 11 and the second clamping arm 12 reaches a set angle, the end button 52 is pressed. At this time, the angle between the first clamping arm 11 and the second clamping arm 12 no longer changes, and the thrust displayed by the thrust testing mechanism no longer changes, which is the pinch force of the micro forceps 1.

[0044] In this embodiment, the pinch force testing device further includes a substrate 6, and the positioning mechanism 2, the thrust testing mechanism 3, and the motion mechanism 4 are mounted on the same substrate 6.

[0045] The substrate 6 is a bottom plate, which can connect the entire pinch force testing device into a whole.

[0046] Obviously, the above embodiments are merely examples for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the creation of the present utility model.

Claims

1. A device for testing the pinching force of a pair of micro forceps, characterized in that, The microscopic forceps (1) comprises a first clamping arm (11) and a second clamping arm (12); one end of the first clamping arm (11) in the length direction and one end of the second clamping arm (12) in the length direction are close to each other and connected to each other to form a forceps handle; the other end of the first clamping arm (11) in the length direction is a first arm end, and the other end of the second clamping arm (12) in the length direction is a second arm end; the first arm end and the second arm end can approach each other or move away from each other; The kneading force testing device comprises a positioning mechanism (2), a thrust testing mechanism (3) and a motion mechanism (4); the positioning mechanism (2) is detachably plugged into the tweezers handle; the thrust testing mechanism (3) abuts against a side of the first clamping arm (11) facing away from the second clamping arm (12) to contact and test the reaction force of the first clamping arm (11); and the motion mechanism (4) is used to drive the thrust testing mechanism (3) and the first clamping arm (11) to move closer to and away from each other.

2. The pinch force testing device for the micro forceps according to claim 1, wherein The positioning mechanism (2) comprises a mounting block (21), a clamping block (22) and a spring plunger (23); the mounting block (21) has a mounting surface, the mounting surface is provided with a positioning groove (24), the positioning groove (24) has a first groove end (241) and a second groove end (242), the first groove end (241) is an open mouth, the tweezers handle can be embedded in the positioning groove (24) from the first groove end (241), the clamping block (22) is arranged on the mounting surface side of the mounting block (21), the clamping block (22) has a clamping surface opposite to the mounting surface, the spring plunger (23) is connected to the clamping block (22) and protrudes from the clamping surface, and the spring plunger (23) is used to clamp the tweezers handle against the groove bottom of the positioning groove (24).

3. The pinch force testing device according to claim 2, wherein The groove width of the first groove end (241) gradually increases in a direction away from the second groove end (242).

4. The pinch force testing device according to claim 2, wherein, The second groove end (242) is closed.

5. The pinch force testing device according to claim 2, wherein The forceps handle is inserted into the positioning groove (24) in a direction away from the first arm end and the second arm end.

6. The pinch force testing device according to claim 2, wherein The spring plunger (23) is arranged in plurality.

7. The pinch force testing device according to claim 1, wherein The thrust testing mechanism (3) is a thrust meter, which comprises a housing (31) and a push rod (32) connected to the housing (31), and the push rod (32) abuts against the first clamping arm (11).

8. The pinch force testing device according to claim 1, characterized in that, The thrust testing mechanism (3) is mounted on the motion mechanism (4), and the motion mechanism (4) drives the thrust testing mechanism (3) to move closer to and away from the first clamping arm (11).

9. The pinch force testing device according to claim 1, wherein The motion mechanism (4) is an electric linear module, and the kneading force testing device further comprises a control box (5), wherein the control box (5) is provided with a start button (51) for controlling the electric linear module to start movement and an end button (52) for controlling the electric linear module to stop movement.

10. The pinch force testing device according to claim 1, wherein, The kneading force testing device further comprises a base plate (6), and the positioning mechanism (2), the thrust testing mechanism (3) and the motion mechanism (4) are installed on the same base plate (6).

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