Operation-based incision distance measuring equipment for incision knife

Abstract

The invention discloses an operation-based incision distance measuring device for an incision knife, which comprises a scalpel, the scalpel comprises a blade and a knife handle, the blade is arranged at one end of the knife handle, and a mounting cavity is arranged in the knife handle; the distance measuring element is installed on the scalpel handle, the distance measuring element comprises two distance measuring wheels, a fixing frame and a driving part, the two distance measuring wheels are located on the two sides of the scalpel handle, the fixing frame, the driving part and the distance measuring circuit are all located in the installation cavity, and a fixing shaft used for installing the distance measuring wheels is rotationally arranged on the fixing frame. The driving piece rotates synchronously by means of rotation of the distance measuring wheel, the fixed conducting rod is made to abut against the multiple movable conducting rods in sequence so that power-on and power-off control of the distance measuring circuit can be achieved, then the power-on and power-off counter is used for recording the number of times of power-on and power-off, and finally the cutting length is calculated through the data calculation module and displayed in real time through the displayer. Therefore, great convenience is provided for doctors to perform an operation.

Description

Technical Field

[0001] The invention discloses an incision distance measuring device based on surgery, belonging to the technical field of surgical instruments. Background Art

[0002] A scalpel typically consists of a blade and a handle. The blade typically has a cutting edge and a mounting slot for the handle. It is typically made of pure titanium, titanium alloy, stainless steel, or carbon steel and is generally disposable. During dissection, the blade is used to incise skin and muscle, the tip is used to clean blood vessels and nerves, and the handle is used for blunt dissection. The appropriate blade and handle are selected based on the size of the wound. During surgery, the precise incision length depends entirely on the surgeon's skill and experience, and precise control of the blade's cutting length is difficult. Short incisions can affect the continuation of the surgery, while longer incisions can increase the time required to suture the wound and increase the patient's pain. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide a surgical-based incision distance measuring device.

[0004] The present invention achieves the above-mentioned object through the following technical solutions: a surgical incision distance measuring device, comprising:

[0005] A scalpel comprising a blade and a handle, wherein the blade is mounted on one end of the handle, and a mounting cavity is provided in the handle;

[0006] A distance measuring element is mounted on the tool handle and includes a distance measuring wheel, a fixing frame, and a driving member. Two distance measuring wheels are provided and located on both sides of the tool handle. The fixing frame, the driving member, and the distance measuring circuit are all located in the mounting cavity. A fixed shaft for mounting the distance measuring wheel is rotatably provided on the fixing frame. The driving member is mounted on the fixed shaft and rotates synchronously with the rotation of the distance measuring wheel.

[0007] The distance measuring circuit includes a power supply module, an active switch, an on-off power counter and a processor, wherein the power supply module is coupled to the on-off power counter and the processor and supplies power to both. The active switch includes a fixed conductive rod and a movable conductive rod, wherein the fixed conductive rod is mounted on a fixed frame, and a plurality of movable conductive rods are provided and distributed on the driving member in a circular array. The movable conductive rod and the fixed conductive rod are coupled to the on-off power counter and the power supply module. During the rotation of the driving member, when the movable conductive rod collides with the fixed conductive rod, the on-off power counter is in an on state and the number of power-on times is increased by one. When the fixed conductive rod is located between two adjacent movable conductive rods, the on-off power counter is in an off state. The processor includes a transmission module and a data calculation module, wherein the data calculation module is configured to receive a power-on time signal from the on-off power counter and multiply the signal by the distance between the two movable conductive rods to obtain the length A of the distance measuring wheel rotation, where the length A is the cutting length of the blade.

[0008] The display is coupled to the transmission module and is used to display the length A.

[0009] Preferably, the driving member includes a first gear, a second gear and a rotating shaft, the first gear is mounted on a fixed shaft, the rotating shaft is rotatably mounted on a fixed frame, and one end of the rotating shaft has a first limiting portion that cooperates with the second gear, the movable conductive rod is mounted on the second gear, the number of teeth of the second gear is less than the number of teeth of the first gear, and the two are engaged for transmission.

[0010] Preferably, a groove is provided on the second gear, and a cover for covering the groove is provided on the side of the second gear, a boss is provided on the cover that is rotatably connected to the fixed frame, and the cover is fixedly connected to the second gear by a bolt, and the movable conductive rod is in a stepped shaft structure, with the end with a large diameter embedded in the second gear and the end with a small diameter penetrating the cover, a conductor is provided on the inner side of the rotating shaft, one end of the conductor extends into the groove, and the other end penetrates the rotating shaft and extends to the outside of the fixed frame, a conductive connector with an umbrella rib structure is provided between the conductor and the multiple movable conductive rods, and the conductor and the fixed conductive rod are coupled to the on-off counter and the power supply module through wires.

[0011] Preferably, a one-way transmission member is provided between the rotating shaft and the fixed frame, and the one-way transmission member includes a rotating disk, a wedge block, a limiting bolt and a first spring. The rotating disk is fixed on the rotating shaft, and a plurality of card slots are distributed in an array on the rotating disk, and the card slots have a guide sliding inclined surface and a blocking surface. One end of the limiting bolt passes through the fixed frame and is fixedly connected to the wedge block. The first spring is sleeved on the outside of the limiting bolt and applies a force to the wedge block to resist the card slot.

[0012] Preferably, the fixing frame includes a first mounting plate and a second mounting plate, the first mounting plate is L-shaped, a plurality of support columns are provided on the second mounting plate, and the first mounting plate is fixedly connected to the support columns by bolts.

[0013] Preferably, the fixing frame is slidably arranged in the mounting cavity, the tool handle is provided with a sliding groove for sliding the fixed shaft, the tool handle is provided with a bottom plate for covering the mounting cavity, and the lowest point of the measuring wheel is lower than the extension line of the blade cutting position.

[0014] Preferably, the distance measuring circuit also includes a varistor and a NOT gate logic circuit, the varistor is installed on the base plate, and the varistor is coupled to the power module, the NOT gate logic circuit couples the varistor and the data calculation module, a second spring is provided in the installation cavity to keep the fixing frame from contacting the varistor, and a positioning column is provided on the fixing frame to position the second spring, the display can display at least two sets of lengths A1 and lengths A2, the length A1 is the distance of the first blade cutting, and the length A2 is the distance of the second blade cutting. When the fixing frame contacts the varistor, the output end of the NOT gate logic circuit outputs a low level to control the data calculation module to clear the length A1, and when the fixing frame is out of contact with the varistor, the output end of the NOT gate logic circuit outputs a high level to control the data calculation module to record the third cutting length A3.

[0015] Preferably, a control switch is provided on the hilt, and the control switch is coupled to the power supply module and is used to control the on and off of the power supply to the ranging circuit.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] By setting up a distance measuring element, a distance measuring circuit and a display, during the operation, the rotation of the distance measuring wheel causes the driving part to rotate synchronously, and the fixed conductive rod is allowed to contact with multiple movable conductive rods in sequence to realize the on and off control of the distance measuring circuit. The on and off times are then recorded by an on and off counter. Finally, the cutting length is calculated by a data calculation module and displayed in real time on the display. This provides great convenience for doctors to perform operations, thereby reducing the pain of patients during surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a surgical-based incision distance measuring device according to the present invention;

[0019] Figure 2 This is a schematic structural diagram of the fixing bracket on the inner side of the knife handle in the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the tool handle disassembling the distance measuring wheel in the present invention;

[0021] Figure 4 Schematic diagram of the structure of the distance measuring element in the present invention;

[0022] Figure 5 Schematic diagram of the structure of the second gear, the fixed conductive rod and the movable conductive rod in the present invention;

[0023] Figure 6 Schematic diagram of the structure of the one-way transmission member and the rotating shaft in the present invention;

[0024] Figure 7 Schematic diagram of the structure of the cover in the present invention;

[0025] Figure 8 Schematic diagram of the local structure of the ranging circuit in the present invention;

[0026] Figure 9 1 is a circuit diagram of the distance measuring circuit in the present invention;

[0027] Figure 1: Blade; 2: Distance measuring wheel; 3: Handle; 4: Distance measuring circuit; 5: Control switch; 6: Mounting cavity; 7: Fixing frame; 8: Distance measuring element; 9: Bottom plate; 10: Fixed shaft; 11: Slide groove; 12: Second mounting plate; 13: Support column; 14: First mounting plate; 15: First gear; 16: Second gear; 17: Power module; 18: Second spring; 19: Positioning column; 20: Rotating shaft; 21: One-way transmission member; 22: Cover; 23: Convex Column; 24. Sink; 25. Conductor; 26. Rotating disk; 27. Movable conductive rod; 28. Conductive connector; 29. ​​First limiting portion; 30. Slot; 31. Guide slope; 32. Blocking surface; 33. First spring; 34. Limiting bolt; 35. Wedge block; 36. Transmission module; 37. Data calculation module; 38. NOT gate logic circuit; 39. Varistor; 40. Processor; 41. On / off counter; 42. Display; 43. Fixed conductive rod. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] like Figures 1-9 As shown, a surgical-based incision distance measuring device comprises:

[0030] The scalpel comprises a blade 1 and a handle 3, wherein the blade 1 is mounted on one end of the handle 3, and a mounting cavity 6 is provided in the handle 3;

[0031] A distance measuring element 8 is mounted on the tool handle 3 and includes a distance measuring wheel 2, a fixing frame 7, and a driving member. Two distance measuring wheels 2 are provided and are located on both sides of the tool handle 3. The fixing frame 7, the driving member, and the distance measuring circuit 4 are all located in the mounting cavity 6. A fixed shaft 10 for mounting the distance measuring wheel 2 is rotatably provided on the fixing frame 7. The driving member is mounted on the fixed shaft 10 and rotates synchronously with the rotation of the distance measuring wheel 2.

[0032] The ranging circuit 4 includes a power supply module 17, an active switch, an on-off counter 41 and a processor 40. The power supply module 17 is coupled to the on-off counter 41 and the processor and supplies power to both. The active switch includes a fixed conductive rod 43 and a movable conductive rod 27. The fixed conductive rod 43 is mounted on the fixed frame 7. There are multiple movable conductive rods 27, which are distributed on the driving member in a circular array. The movable conductive rods 27 and the fixed conductive rods 43 are coupled to the on-off counter 41 and the power supply module 17. During the rotation of the driving member, when the active When the conductive rod 27 contacts the fixed conductive rod 43, the on-off counter 41 is in the on state and the number of power-on times is increased by one. When the fixed conductive rod 43 is located between two adjacent movable conductive rods 27, the on-off counter 41 is in the off state. The processor 40 includes a transmission module 36 and a data calculation module 37. The data calculation module 37 is configured to receive the power-on number signal of the on-off counter 41 and multiply the signal by the distance between the two movable conductive rods 27 to obtain the length A of the distance measuring wheel 2 rotated. The length A is the cutting length of the blade 1.

[0033] The display 42 is coupled to the transmission module 36 and is used to display the length A.

[0034] The driving member includes a first gear 15, a second gear 16 and a rotating shaft 20. The first gear 15 is mounted on the fixed shaft 10, and the rotating shaft 20 is rotatably mounted on the fixed frame 7. One end of the rotating shaft 20 has a first limit portion 29 that cooperates with the second gear 16. The movable conductive rod 27 is mounted on the second gear 16. The number of teeth of the second gear 16 is less than the number of teeth of the first gear 15, and the two are engaged for transmission. By controlling the transmission ratio of the first gear 15 and the second gear 16 and the distance between the two movable conductive rods 27, the distance moved by the measuring wheel 2 is equal to the distance moved by the movable conductive rod 27. In this way, the cutting length of the blade 1 can be directly displayed through the display 42, thereby simplifying the difficulty of measurement and calculation.

[0035] A sinking groove 24 is provided on the second gear 16, and a cover 22 for covering the sinking groove 24 is provided on the side of the second gear 16. A boss 23 rotatably connected to the fixing frame 7 is provided on the cover 22, and the cover 22 is fixedly connected to the second gear 16 by bolts. The movable conductive rod 27 is a stepped shaft structure, with one end with a large diameter embedded in the second gear 16 and the other end with a small diameter penetrating the cover 22. A conductor 25 is provided on the inner side of the rotating shaft 20, one end of the conductor 25 extends into the sinking groove 24, and the other end penetrates the rotating shaft 20 and extends to the outside of the fixing frame 7. A conductive connector 28 with an umbrella rib structure is provided between the conductor 25 and the multiple movable conductive rods 27. The electric body 25 and the fixed conductive rod 43 are coupled to the on-off counter 41 and the power module 17 through wires. When the distance measuring wheel 2 rotates, it can drive the fixed shaft 10 and the first gear 15 to rotate synchronously, and the first gear 15 drives the second gear 16 to rotate, so that the multiple movable conductive rods 27 rotate synchronously with the second gear 16. In this way, the multiple movable conductive rods 27 will successively conflict with the fixed conductive rod 43 during the rotation process. In this way, the circuit connected to the on-off counter 41 will present an alternating state of power on and power off. The on-off counter 41 will record the number of power ons and transmit it to the data calculation module 37, thereby preparing for the subsequent calculation of the cutting length of the blade 1.

[0036] A one-way transmission member 21 is provided between the rotating shaft 20 and the fixed frame 7. The one-way transmission member 21 includes a rotating disk 26, a wedge block 35, a limiting bolt 34 and a first spring 33. The rotating disk 26 is fixed to the rotating shaft 20, and a plurality of card slots 30 are distributed in an array on the rotating disk 26. The card slot 30 has a guide slope 31 and a blocking surface 32. One end of the limiting bolt 34 passes through the fixed frame 7 and is fixedly connected to the wedge block 35. The first spring 33 is sleeved on the outside of the limiting bolt 34 and applies a force to the wedge block 35 to resist the card slot 30. When the wedge block 35 cooperates with the card slot 30, the two can rely on the guide slope 31 to prevent the card slot from sliding. 1 slides relative to each other, and the rotating disk 26 rotates in one direction, while the blocking surface 32 restricts the rotating disk 26 from rotating in the opposite direction. In this way, during surgery, when the blade 1 is incising muscle tissue in one direction, the rotation of the distance measuring wheel 2 is not restricted, while the directional rotation of the distance measuring wheel 2 is restricted by the blocking surface 32. At the same time, the elastic force exerted by the first spring 33 on the wedge block 35 causes the rotation of the rotating disk 26 to encounter a certain resistance. In this way, the blade 1 can be prevented from moving in the opposite direction during cutting or after cutting, thereby preventing the measurement of the cutting length from being affected, thereby avoiding interference with the measurement result.

[0037] The fixing frame 7 includes a first mounting plate 14 and a second mounting plate 12. The first mounting plate 14 is L-shaped. A plurality of support columns 13 are provided on the second mounting plate 12. The first mounting plate 14 is fixedly connected to the support columns 13 by bolts. The fixing frame 7 is designed as a split structure, which can facilitate the installation of the driving part and the fixed shaft 10.

[0038] The fixing frame 7 is slidably arranged in the mounting cavity 6, and the handle 3 is provided with a slide groove 11 for the sliding of the fixed shaft 10. The handle 3 is provided with a bottom plate 9 for covering the mounting cavity 6. The lowest point of the distance measuring wheel 2 is lower than the extension line of the cutting position of the blade 1. During the operation, the distance measuring wheel 2 first contacts the muscle tissue, which not only increases the friction between the two, allowing the distance measuring wheel 2 to rotate smoothly, but also facilitates the subsequent recording of the cutting length of the blade 1.

[0039] The distance measuring circuit 4 also includes a piezoresistor 39 and a NOT gate logic circuit 38. The piezoresistor 39 is mounted on the base plate 9 and coupled to the power module 17. The NOT gate logic circuit 38 couples the piezoresistor 39 and the data calculation module 37. A second spring 18 is provided in the mounting cavity 6 to keep the fixing frame 7 from contacting the piezoresistor 39. A positioning column 19 is provided on the fixing frame 7 to position the second spring 18. The display 42 can display at least two sets of lengths A1 and A2. The length A1 is the distance cut by the blade 1 for the first time, and the length A2 is the distance cut by the blade 1 for the second time. When the fixing frame 7 contacts the piezoresistor 39, the output end of the NOT gate logic circuit 38 outputs a low level to control the data calculation module 37 to clear the length A1. When the fixing frame 7 is out of contact with the piezoresistor 39, the NOT gate logic circuit 38 outputs a low level to control the data calculation module 37 to clear the length A1. The output terminal of the logic circuit 38 outputs a high level to control the data calculation module 37 to record the third cutting length A3. During the operation, the distance measuring wheel 2 is pressed against the muscle tissue. The reaction force exerted by the muscle tissue on the distance measuring wheel 2 allows the distance measuring wheel 2 to drive the fixed shaft 10 and the fixed frame 7 to move upward, and the fixed frame 7 is released from the interference with the piezoresistor 39. In this way, the first cutting length A1 and the second cutting length A2 of the blade 1 during the operation can be measured. After the second cutting is completed, the distance measuring wheel 2 is released from the muscle tissue, allowing the fixed frame 7 to return to its original position under the action of the second spring 18. The fixed frame 7 again contacts the piezoresistor 39, and the data calculation module 37 clears the data of the first cutting length A1 displayed on the display 42, and prepares for recording the data of the third cutting length A3 of the blade 1.

[0040] A control switch 5 is provided on the handle 3, and the control switch 5 is coupled to the power module 17 for controlling the on and off of the power supply of the ranging circuit 4. When surgery is required, by pressing the control switch 5, the ranging circuit 4 can be normally powered by the power module 17. At the end of the surgery, the control switch 5 can disconnect the power supply of the ranging circuit 4, thereby saving energy.

[0041] Working principle: During surgery, the doctor holds the knife handle 3 and presses the distance measuring wheel 2 against the muscle tissue. The distance measuring wheel 2 drives the fixed shaft 10 and the fixed frame 7 to slide upward. At this time, the distance measuring circuit 4 is ready and can start measuring the cutting length of the blade 1. When the doctor moves the knife handle 3 and the blade 1 cuts the muscle tissue, the distance measuring wheel 2 starts to rotate and drives the fixed shaft 10 and the driving member to rotate synchronously. During the rotation of the driving member, the fixed conductive rod 43 and the multiple movable conductive rods 27 collide with each other in sequence. The power-on and power-off counter 41 is used to record the number of times the fixed conductive rod 43 and the movable conductive rod 27 are energized. Then, the data calculation module 37 multiplies the number of power-ons by the distance between two adjacent movable conductive rods 27 to calculate the cutting length of the blade 1. The cutting length can be transmitted to the display 42 through the transmission module 36 for display, so that the doctor can understand the cutting length of the blade 1 in real time during surgery, effectively control the size of the surgical wound, and reduce the patient's pain.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0043] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of 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 implementation methods that can be understood by those skilled in the art.

Claims

1. A surgical incision distance measuring device, characterized in that: include: A scalpel comprising a blade (1) and a handle (3), wherein the blade (1) is mounted on one end of the handle (3), and a mounting cavity (6) is provided in the handle (3); A distance measuring element (8) is mounted on the tool handle (3), and the distance measuring element (8) includes a distance measuring wheel (2), a fixing frame (7) and a driving member, wherein two distance measuring wheels (2) are provided and located on both sides of the tool handle (3), the fixing frame (7), the driving member and the distance measuring circuit (4) are all located in the mounting cavity (6), a fixed shaft (10) for mounting the distance measuring wheel (2) is rotatably provided on the fixing frame (7), and the driving member is mounted on the fixed shaft (10) and keeps rotating synchronously with the rotation of the distance measuring wheel (2); A distance measuring circuit (4) includes a power supply module (17), an active switch, an on / off counter (41) and a processor (40), wherein the power supply module (17) is coupled to the on / off counter (41) and the processor and supplies power to both. The active switch includes a fixed conductive rod (43) and a movable conductive rod (27), wherein the fixed conductive rod (43) is mounted on a fixed frame (7), and a plurality of movable conductive rods (27) are provided and distributed on a driving member in a circular array. The movable conductive rods (27) and the fixed conductive rods (43) are coupled to the on / off counter (41) and the power supply module (17). During the rotation of the driving member, When the movable conductive rod (27) contacts the fixed conductive rod (43), the on-off counter (41) is in an on-state and the number of on-times is increased by one. When the fixed conductive rod (43) is located between two adjacent movable conductive rods (27), the on-off counter (41) is in an off-state. The processor (40) includes a transmission module (36) and a data calculation module (37). The data calculation module (37) is used to receive a signal of the number of on-times of the on-off counter (41) and multiply the signal by the distance between the two movable conductive rods (27) to obtain a length A of rotation of the distance measuring wheel (2). The length A is the cutting length of the blade (1). A display (42) is coupled to the transmission module (36) and is used to display the length A.

2. The surgical incision distance measuring device according to claim 1, characterized in that: The driving member includes a first gear (15), a second gear (16) and a rotating shaft (20), wherein the first gear (15) is mounted on the fixed shaft (10), the rotating shaft (20) is rotatably mounted on the fixed frame (7), and one end of the rotating shaft (20) has a first limiting portion (29) that cooperates with the second gear (16), the movable conductive rod (27) is mounted on the second gear (16), the number of teeth of the second gear (16) is less than the number of teeth of the first gear (15), and the two are meshed for transmission.

3. The surgical incision distance measuring device according to claim 2, characterized in that: The second gear (16) is provided with a sink groove (24), and a cover (22) for covering the sink groove (24) is provided on the side of the second gear (16). The cover (22) is provided with a boss (23) rotatably connected to the fixing frame (7), and the cover (22) is fixedly connected to the second gear (16) by bolts. The movable conductive rod (27) is a stepped shaft structure, and its end with a large diameter is embedded in the second gear (16), and its end with a small diameter passes through the cover (22). A conductor (25) is provided on the inner side of the rotating shaft (20), one end of the conductor (25) extends into the sink (24), and the other end passes through the rotating shaft (20) and extends to the outside of the fixed frame (7), a conductive connector (28) in an umbrella-shaped structure is provided between the conductor (25) and a plurality of movable conductive rods (27), and the conductor (25) and the fixed conductive rod (43) are coupled to the on-off counter (41) and the power module (17) through a wire.

4. The surgical incision distance measuring device according to claim 3, characterized in that: A one-way transmission member (21) is provided between the rotating shaft (20) and the fixing frame (7), and the one-way transmission member (21) includes a rotating disk (26), a wedge block (35), a limiting bolt (34) and a first spring (33). The rotating disk (26) is fixed on the rotating shaft (20), and a plurality of card slots (30) are distributed in an array on the rotating disk (26). The card slots (30) have a guide sliding inclined surface (31) and a blocking surface (32). One end of the limiting bolt (34) passes through the fixing frame (7) and is fixedly connected to the wedge block (35). The first spring (33) is sleeved on the outside of the limiting bolt (34) and applies a force to the wedge block (35) to resist the card slot (30).

5. The surgical incision distance measuring device according to claim 3, characterized in that: The fixing frame (7) comprises a first mounting plate (14) and a second mounting plate (12), wherein the first mounting plate (14) is L-shaped, a plurality of support columns (13) are provided on the second mounting plate (12), and the first mounting plate (14) is fixedly connected to the support columns (13) by bolts.

6. The surgical incision distance measuring device according to claim 3, characterized in that: The fixing frame (7) is slidably arranged in the installation cavity (6); a sliding groove (11) for sliding the fixing shaft (10) is provided on the knife handle (3); a bottom plate (9) for covering the installation cavity (6) is provided on the knife handle (3); and the lowest point of the distance measuring wheel (2) is lower than the extension line of the cutting position of the blade (1).

7. The surgical incision distance measuring device according to claim 6, characterized in that: The distance measuring circuit (4) further includes a piezoresistor (39) and a NOT gate logic circuit (38), wherein the piezoresistor (39) is mounted on the base plate (9), and the piezoresistor (39) is coupled to the power module (17), and the NOT gate logic circuit (38) is coupled to the piezoresistor (39) and the data calculation module (37), a second spring (18) for keeping the fixing frame (7) against the piezoresistor (39) is provided in the mounting cavity (6), a positioning column (19) for positioning the second spring (18) is provided on the fixing frame (7), and the display ( 42) can display at least two sets of lengths A1 and lengths A2, wherein length A1 is the distance cut by the first blade (1), and length A2 is the distance cut by the second blade (1). When the fixing frame (7) contacts the pressure-sensitive resistor (39), the output end of the NOT gate logic circuit (38) outputs a low level to control the data calculation module (37) to clear the length A1. When the fixing frame (7) is out of contact with the pressure-sensitive resistor (39), the output end of the NOT gate logic circuit (38) outputs a high level to control the data calculation module (37) to record the third cutting length A3.

8. The surgical incision distance measuring device according to claim 6, characterized in that: A control switch (5) is provided on the shank (3), and the control switch (5) is coupled to the power supply module (17) and is used to control the on and off of the power supply of the distance measuring circuit (4).

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