Measuring jig for clamping force of jaw of electric knife

Abstract

The utility model discloses an electrotome jaw clamping force measuring jig, which comprises a positioning table and a tension mechanism, a positioning notch is arranged on the positioning table, the tension mechanism comprises a pull and push dynamometer, a movable pulley, a fixed pulley, a wire rope and a sliding connection block, the movable pulley and the fixed pulley are symmetrically arranged on two sides of the positioning notch, the wire rope is wound on the movable pulley and the fixed pulley, and the sliding connection block is arranged on the movable pulley and the fixed pulley. Two ends of the wire rope are respectively sleeved on a clamp arm on one side of the jaw to be measured, a steel wire with a weight hung is clamped in the jaw to be measured, the movable pulley is arranged on the sliding connection block, and a pull shaft of the pull-push dynamometer is connected with the sliding connection block to pull the movable pulley to slide synchronously. The clamping force of the to-be-measured jaw is calculated according to a pulling force value generated when the to-be-measured jaw is pulled open by the push-pull dynamometer to enable the steel wire to slide. The clamping force of the to-be-measured jaw is calculated according to the pulling force value generated when the to-be-measured jaw is pulled open by the push-pull dynamometer to enable the steel wire to slide. According to the scheme, the clamping force of the jaw can be conveniently and accurately measured.

Description

Technical Field

[0001] This utility model relates to the field of medical device manufacturing tools, specifically to a measuring fixture for the clamping force of an electrosurgical clamp. Background Technology

[0002] An electrosurgical unit has jaws and a blade built into them, giving it multiple functions: gripping tissue, coagulating tissue with high-frequency electrical energy, and cutting tissue with the blade. The operation of an electrosurgical unit involves first controlling the jaws to close and grip the tissue, then using the blade to cut. This process requires ensuring the reliability of the jaw closure during the cutting process. Therefore, the clamping force of the jaws is one of the important performance parameters of an electrosurgical unit, and its clamping force needs to be tested to ensure that the electrosurgical unit has a qualified clamping force.

[0003] As disclosed in announcement number CN217447989U, the jaw assembly of an electrosurgical unit has protruding electrode plates on its clamping surface. The protruding structure of the electrode plates makes it impossible to directly measure the jaw assembly using a strain gauge. Therefore, determining whether the clamping force of the jaw is qualified is a problem that needs to be solved. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a measuring fixture for the clamping force of an electric knife jaw.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A measuring fixture for measuring the clamping force of an electrosurgical clamp includes a positioning platform and a pulling mechanism. The positioning platform has a positioning slot to define the position of the clamp jaws to be tested. The pulling mechanism includes a push-pull gauge, a movable pulley, a fixed pulley, a wire rope, and a sliding connecting block. The movable and fixed pulleys are symmetrically arranged on both sides of the positioning slot. The wire rope is wound around the movable and fixed pulleys, and both ends of the wire rope are respectively sleeved on one side of the clamp arm of the clamp jaws to be tested. A weight is suspended within the clamp jaws to be tested. The steel wire is weighed, the movable pulley is mounted on the sliding connecting block, the sliding connecting block is slidably mounted on the positioning platform, and the push-pull force gauge is mounted on the linear slide rail, with its pull shaft connected to the sliding connecting block, to pull the movable pulley to slide synchronously, so that the wire rope forms a reverse pull force on both sides of the jaws to be tested, opposite to its clamping force. The clamping force of the jaws to be tested is calculated by the pull force value generated when the push-pull force gauge pulls open the jaws to be tested and the steel wire slides.

[0007] Preferably, a sliding groove perpendicular to the positioning slot is provided on one side, and the sliding connecting block is slidably disposed in the sliding groove. The axes of the pull shaft, the movable pulley, the fixed pulley, the wire rope, and the sliding connecting block are all in the same plane.

[0008] Preferably, a pin is vertically fixed on the sliding connecting block, and the end of the pull shaft is hook-shaped and engages with the pin.

[0009] Preferably, the straight line connecting the two ends of the wire rope to the clamp arm of the jaw to be tested is tangent to the movable pulley and the fixed pulley.

[0010] Preferably, the diameter of the steel wire is greater than the width of the maximum gap between the jaws under test in the clamping state, and the distance between the wires is less than the width of the maximum gap between the jaws under test in the clamping state.

[0011] Preferably, the weight is less than the friction between the steel wire and the jaw arm of the jaw to be tested.

[0012] Preferably, the distance between the steel wire and the rope is no greater than 1 mm.

[0013] Preferably, a limiting block is fixed on the front side of the positioning slot, and the limiting block abuts against the front end of the jaw to be tested to limit the front and rear position of the jaw to be tested.

[0014] Preferably, the jaws to be tested are disposed at the front end of the electrosurgical sleeve, and the positioning platform is provided with a limiting groove for limiting the electrosurgical sleeve. The limiting groove has a V-shaped cross-section to limit the left and right positions of the jaws to be tested.

[0015] Preferably, the limiting groove is further provided with a quick clamp to confine the electrosurgical sleeve within the limiting groove.

[0016] The beneficial effects of this utility model are mainly reflected in:

[0017] 1. A wire rope is set to connect to the jaw arm of the jaw to be tested. The tension mechanism is connected to the wire rope. The clamping force of the jaw can be calculated by measuring the tension that pulls the jaw open. This can avoid the interference of the protruding electrode plate, obtain a more accurate clamping force, and facilitate operation.

[0018] 2. Clamp a steel wire with a weight attached in the jaws to be tested. The opening of the jaws can be quickly determined by the loosening of the steel wire. This allows for easy observation of the tension value when the jaws open, thereby further improving the measurement accuracy of the clamping force. Attached Figure Description

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0020] Figure 1 : Schematic diagram of an embodiment of this utility model;

[0021] Figure 2 : A schematic diagram of another aspect of an embodiment of the present utility model;

[0022] Figure 3 : Partial schematic diagram of an embodiment of this utility model;

[0023] Figure 4 : Figure 3 An enlarged schematic diagram of part A in the middle. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0025] In the description of the solution, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Also, in the description of the solution, with the operator as a reference, the direction closer to the operator is the proximal end, and the direction farther from the operator is the distal end.

[0026] like Figures 1 to 4As shown, this utility model discloses a measuring fixture for the clamping force of an electric knife jaw, including a positioning platform 1 and a pulling mechanism. The positioning platform 1 is provided with a positioning slot 101 to define the position of the jaw 100 to be measured. The pulling mechanism includes a push-pull force gauge 201, a movable pulley 202, a fixed pulley 203, a wire rope 204, and a sliding connecting block 205. The movable pulley 202 and the fixed pulley 203 are symmetrically arranged on both sides of the positioning slot 101. The wire rope 204 is wound around the movable pulley 202 and the fixed pulley 203, and both ends of the wire rope 204 are respectively sleeved on one side of the jaw arm of the jaw 100 to be measured. The clamp 100 holds a steel wire 3 with a weight 301 suspended from it. The movable pulley 202 is mounted on the sliding connecting block 205, which is slidably mounted on the positioning platform 1. The push-pull force gauge 201 is mounted on the linear slide rail 207, and its pull shaft 2011 is connected to the sliding connecting block 205 to pull the movable pulley 202 to slide synchronously. This causes the wire rope 9 to form a reverse pulling force on both sides of the clamping arms of the jaw 100 to be tested, opposite to its clamping force. The clamping force of the jaw 100 to be tested is calculated by the pulling force value generated when the push-pull force gauge 201 pulls open the jaw 100 to be tested and the steel wire 3 slides.

[0027] This solution uses a wire rope 9 to connect to the clamp arm of the jaw 100 to be tested, and a tension mechanism is connected to the wire rope 204. By calculating the tension that pulls the jaw 100 apart, the clamping force of the jaw 100 to be tested can be calculated in reverse. This can avoid interference from the protruding electrode plate, obtain a more accurate clamping force, and is convenient to operate.

[0028] like Figure 1 and Figure 3 As shown, a sliding groove 102 perpendicular to the positioning slot 101 is provided on one side. The sliding connecting block 205 is slidably disposed within the sliding groove 102, and the sliding groove 102 is used to limit the sliding direction of the sliding connecting block 205. Preferably, the axes of the pull shaft 2011, the movable pulley 202, the fixed pulley 203, the wire rope 204, and the sliding connecting block 205 are all located in the same plane to minimize the tensile damage and ensure detection accuracy.

[0029] A pin 206 is vertically fixed on the sliding connecting block 205. The end of the pull shaft 2011 is hook-shaped and engages with the pin 206 to ensure an effective connection between the pull shaft 2011 and the sliding connecting block 205. This arrangement also facilitates control that the axes of the pin 206, the movable pulley 202, and the fixed pulley 203 are all on the same straight line, ensuring that after the pull shaft 2011 engages with the pin 206, the pull shaft 2011 is also on the same straight line as the axis of the movable pulley 202.

[0030] The straight line connecting the two ends of the wire rope 204 to the clamp arm of the jaw 100 to be tested is tangent to the movable pulley 202 and the fixed pulley 203, so as to reduce the tension loss when the wire rope 204 pulls the jaw 100 to be tested and ensure the test accuracy.

[0031] The diameter of the steel wire 3 is greater than the width of the maximum gap of the jaws 100 under test in the clamping state, and the spacing between the wire ropes 204 is less than the width of the maximum gap of the jaws 100 under test in the clamping state. This structure ensures that the wire ropes 204 themselves will not pry open the jaws 100 under test, thus avoiding interference with the test results.

[0032] Furthermore, the weight 301 has a lower gravity than the frictional force between the steel wire 3 and the jaw 100 to be measured, and the distance between the steel wire 3 and the wire rope 204 is no greater than 1 mm. This is to minimize tension loss and ensure measurement accuracy.

[0033] like Figure 3 As shown, a limiting block 104 is fixedly provided on the front side of the positioning slot 101. The limiting block 104 abuts against the front end of the jaw 100 to be tested, thereby limiting the front and rear position of the jaw 100 to be tested.

[0034] Generally, the jaws to be tested 100 are located at the front end of the electric knife sleeve 200. Therefore, the positioning table 1 is provided with a limiting groove 103 for limiting the electric knife sleeve 200. The cross-section of the limiting groove 103 is V-shaped to limit the left and right positions of the jaws to be tested 100.

[0035] Furthermore, a quick clamp 105 is also provided on the limiting groove 103 to limit the electric knife sleeve 200 within the limiting groove 103.

[0036] The working principle of this measuring fixture is as follows: the push-pull force gauge 201 pulls the movable pulley 202 to slide, thereby increasing the distance between the movable pulley 202 and the fixed pulley 203. Since the length of the silk rope 204 remains unchanged, the silk rope 204 will pull the clamp arm around the movable pulley 202 and the fixed pulley 203 in the opposite direction to the clamping force of the jaw 100 to be measured, thereby generating a reverse pulling force. At the same time, the push-pull force gauge 201 will generate the corresponding pulling force value in real time.

[0037] A steel wire 3 with a weight 301 suspended from it is held in the jaw 100 to be tested. The opening of the jaw 100 to be tested can be quickly determined by the loosening of the steel wire 3. This makes it easier to observe the tensile force value when the jaw 100 to be tested is opened, thereby further improving the measurement accuracy of the clamping force.

[0038] When the steel wire 3 falls, it indicates that the reverse pull force received by the jaws 100 under test is greater than its clamping force. Therefore, when the steel wire 3 just begins to loosen, the reverse pull force received by the jaws 100 under test is approximately equal to the clamping force of the jaws 100 under test. Dividing the pull value of the push-pull force gauge 201 at this time by two gives the clamping force of the jaws 100 under test.

[0039] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0040] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementation methods or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A measuring jig for the holding force of an electrosurgical forceps jaw, characterized by: The device includes a positioning platform (1) and a pulling mechanism. The positioning platform (1) is provided with a positioning slot (101) to define the position of the jaws (100) to be tested. The pulling mechanism includes a push-pull gauge (201), a movable pulley (202), a fixed pulley (203), a wire rope (204), and a sliding connecting block (205). The movable pulley (202) and the fixed pulley (203) are symmetrically arranged on both sides of the positioning slot (101). The wire rope (204) is wound around the movable pulley (202) and the fixed pulley (203), and the two ends of the wire rope (204) are respectively sleeved on one side of the jaw (100) to be tested. A weight (3) is suspended in the jaw (100) to be tested. 01) steel wire (3), the movable pulley (202) is set on the sliding connecting block (205), the sliding connecting block (205) is slidably set on the positioning platform (1), the push-pull force gauge (201) is set on the linear slide rail (207), and its pull shaft (2011) is connected to the sliding connecting block (205) to pull the movable pulley (202) to slide synchronously, so that the wire rope (204) forms a reverse pull force opposite to its clamping force on both sides of the jaw (100) to be tested. The clamping force of the jaw (100) to be tested is calculated by the pull force value generated when the push-pull force gauge (201) pulls open the jaw (100) to be tested and the steel wire (3) slides.

2. The electrosurgical jaw clamping force measuring fixture of claim 1, wherein: A sliding groove (102) perpendicular to the positioning slot (101) is provided on one side. The sliding connecting block (205) is slidably disposed in the sliding groove (102). The axes of the pull shaft (2011), the movable pulley (202), the fixed pulley (203), the wire rope (204), and the sliding connecting block (205) are all in the same plane.

3. The electrosurgical jaw clamping force measuring fixture of claim 2, wherein: A pin (206) is vertically fixed on the sliding connecting block (205), and the end of the pull shaft (2011) is hook-shaped and engages with the pin (206).

4. The electrosurgical jaw clamping force measuring fixture of claim 3, wherein: The straight line connecting the two ends of the wire rope (204) to the clamp arm of the jaw (100) to be tested is tangent to the movable pulley (202) and the fixed pulley (203).

5. The electrosurgical jaw clamping force measuring fixture of claim 4, wherein: The diameter of the steel wire (3) is greater than the width of the maximum gap of the jaws (100) under the clamping state, and the diameter of the wire rope (204) is less than the width of the maximum gap of the jaws (100) under the clamping state.

6. The electrosurgical jaw clamping force measuring fixture of claim 5, wherein: The weight (301) has a lower gravity than the frictional force between the steel wire (3) and the jaws (100) to be tested.

7. The electrosurgical jaw closure force measurement fixture of claim 6, wherein: The distance between the steel wire (3) and the wire rope (204) is no greater than 1 mm.

8. The electrosurgical jaw closure force measurement fixture of claim 7, wherein: A limiting block (104) is fixedly provided on the front side of the positioning slot (101). The limiting block (104) abuts against the front end of the jaw (100) to limit the front and rear position of the jaw (100).

9. The electrosurgical jaw clamping force measuring fixture of claim 8, wherein: The jaws to be tested (100) are located at the front end of the electric knife sleeve (200). The positioning platform (1) is provided with a limiting groove (103) for limiting the electric knife sleeve (200). The cross-section of the limiting groove (103) is V-shaped to limit the left and right positions of the jaws to be tested (100).

10. The electrosurgical jaw clamping force measuring fixture of claim 9, wherein: A quick clamp (105) is also provided on the limiting groove (103) to limit the electric knife sleeve (200) within the limiting groove (103).

Images