Foot switch for closing surgical instrument

Abstract

The utility model discloses a pedal switch for a closed surgical instrument, and relates to the technical field of medical instruments, the pedal switch comprises a pedal plate, a fixed shell, a main supporting piece, a contact switch, a footrest block and a locking rod, the pedal plate is obliquely arranged relative to the fixed shell, and the lower end of the pedal plate is hinged to the fixed shell; the main supporting piece and the contact switch are both arranged between the pedal plate and the fixed shell, the main supporting piece is used for supporting the pedal plate and enabling the pedal plate to rebound, and after the pedal plate is treaded down, the contact switch is triggered and a trigger signal is sent out; the footrest block is movably connected to the fixed shell, and the footrest block and the pedal plate are distributed at intervals; the locking rod is correspondingly located below the pedal plate, and when the foot rest block is treaded down, the locking rod stretches out to abut against the pedal plate so as to limit treading down of the pedal plate. The pedal switch has the effect of improving the use safety of the pedal switch.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and in particular to a foot switch for a closed surgical instrument. Background Technology

[0002] A high-frequency ultrasound simultaneous dual-output energy platform is a high-frequency ultrasound electrosurgical device capable of simultaneously outputting high-frequency electrical energy and ultrasonic energy. It heats tissue through high-frequency, high-voltage current generated at the effective electrode tip upon contact with the body, achieving tissue separation and coagulation, thereby achieving cutting and hemostasis. The microcontroller inside the closed surgical instrument can simultaneously generate high-frequency and ultrasonic signals. After being amplified and isolated by the control terminal, the signals are output. The microcontroller (CPU) precisely and in real-time controls the output power and ultrasonic energy level based on preset high-frequency power and ultrasonic energy values.

[0003] Closed surgical instruments are generally used in conjunction with transducers, radiofrequency ultrasonic scalpels, ultrasonic electrosurgical units, surgical electrodes, and foot switches. Among them, the foot switch is a key control device. The main functions of the foot switch include, but are not limited to, controlling the output of ultrasonic energy, switching between different modes (dual energy control), and controlling multi-channel ultrasonic systems. By stepping on the foot, doctors can flexibly control the output of ultrasonic energy during surgery, thereby freeing their hands and improving the accuracy of the operation.

[0004] Foot switches are usually placed near the doctor's feet for easy operation. However, when the foot switch is not in use or during operation, the doctor's feet may be resting and accidentally touch the foot switch, potentially leading to misoperation during surgery. Summary of the Invention

[0005] In order to improve the situation where conventional foot switches may be accidentally activated during use, thereby affecting the surgical process, this application provides a foot switch for closing surgical instruments.

[0006] This application provides a foot switch for a closed surgical instrument, employing the following technical solution:

[0007] A foot switch for a closed surgical instrument, including

[0008] The foot pedal and the fixed housing are arranged at an angle relative to the fixed housing, and the lower end of the foot pedal is hinged to the fixed housing.

[0009] The main support and the contact switch are both located between the foot pedal and the fixed housing. The main support is used to support the foot pedal and make the foot pedal rebound. When the foot pedal is pressed, it triggers the contact switch and sends a trigger signal outward.

[0010] The footrest block is movably connected to the fixed housing, and the footrest block and the foot pedal are spaced apart;

[0011] The locking lever is located below the foot pedal. When the footrest is pressed down, the locking lever extends and abuts against the foot pedal to restrict the pedal from being pressed down.

[0012] Optionally, the resting block is vertically slidably connected to the fixed housing, the locking rod is horizontally arranged and located below the resting block, a trigger wedge is provided at the end of the locking rod near the resting block, the top surface of the trigger wedge gradually tilts downward in the direction away from the locking rod, and a first return member is provided on the side of the trigger wedge near the locking rod to keep the locking rod retracted into the fixed housing.

[0013] Optionally, it also includes an auxiliary support mechanism, which includes an auxiliary support rod, a first drive assembly, and a second drive assembly. The auxiliary support rod is vertically slidably connected between the foot pedal and the fixed housing, and the top of the auxiliary support rod is used to abut against the bottom surface of the foot pedal.

[0014] When the footrest is pressed down, the footrest drives the auxiliary support rod to descend via the first drive assembly, so that the auxiliary support rod is disengaged from the foot pedal; conversely, the footrest drives the auxiliary support rod to rise via the second drive assembly, so as to press against the bottom surface of the foot pedal.

[0015] Optionally, the auxiliary support mechanism further includes a support cylinder and a piston. The support cylinder is vertically fixed between the foot pedal and the fixed housing. The piston is vertically slidably connected inside the support cylinder. The auxiliary support rod is slidably and sealingly connected to the support cylinder, and its bottom is fixed to the piston. The piston divides the internal cavity of the support cylinder into a first chamber and a second chamber. The first drive component charges and discharges air into the first chamber, and the second drive component charges and discharges air into the second chamber to drive the piston to move up and down.

[0016] Optionally, the first driving component includes a first airbag and a first connecting tube. One end of the first connecting tube is connected to the first chamber, and the other end of the first connecting tube is connected to the first airbag. The first airbag is correspondingly disposed below the footrest block, and the first airbag is squeezed when the footrest block is stepped on.

[0017] Optionally, the second drive assembly includes a pressure block, a second airbag, and a second connecting tube. One end of the second connecting tube is connected to the second chamber, and the other end of the second connecting tube is connected to the second airbag. The pressure block is vertically slidably connected above the second airbag. In the initial state, the pressure block presses the second airbag downward by its own weight.

[0018] Optionally, the second drive assembly further includes a second return member, which is vertically placed in the second chamber. The top end of the second return member abuts against the bottom surface of the piston, while the bottom end abuts against the inner wall of the support cylinder.

[0019] Optionally, the bottom wall of the fixed housing is provided with an anti-slip pad.

[0020] In summary, this application includes at least one of the following beneficial effects:

[0021] 1. By incorporating a footrest block independent of the foot pedal on the fixed housing, the doctor can place their foot on the footrest block when not operating the foot pedal. The footrest block provides support for the doctor's foot, allowing it to rest and relax fully during surgery. Furthermore, the footrest block provides a fixed resting position for the doctor's foot used to operate the foot pedal, reducing the likelihood of accidental pedal activation. Simultaneously, when the doctor places their natural foot on the footrest block, a downward pressure is applied, causing the footrest block to move downwards. As the footrest block moves downwards, it comes into contact with the trigger wedge below. Since the top surface of the trigger wedge is inclined, the downward-moving footrest block pushes the trigger wedge away from the footrest block, thereby pushing the locking lever out of the fixed housing. After the locking lever extends out of the fixed housing, it is located just below the foot pedal and on the foot pedal's movement path, so that the locking lever can restrict the foot pedal from being pressed down. At this time, even if external force is applied to the foot pedal, it cannot be pressed down, thus achieving the prevention of accidental operation of the foot pedal, making the foot switch safer and more reliable in use.

[0022] 2. By setting a vertically sliding auxiliary support rod between the fixed housing and the foot pedal, the auxiliary support rod can slide upward so that the top of the auxiliary support rod abuts against the bottom surface of the foot pedal. When the foot switch is used for a long time, the main support component inside may gradually lose its own support elasticity, so that the main support component can not provide good support for the foot pedal. At this time, the foot pedal may only need a small external force to rotate and trigger the contact switch. In order to prevent accidental operation, the auxiliary support rod can apply an auxiliary support force to the foot pedal, thereby effectively reducing the possibility of accidental operation.

[0023] 3. In the initial state, the pressure block can press down on the second airbag by its own weight. After being compressed, the second airbag forces the air inside it into the second chamber through the second connecting pipe. The increase in gas in the second chamber increases the pressure in the second chamber, thereby pushing the piston and the auxiliary support rod upward together, so that the auxiliary support rod can abut against the foot pedal and support the foot pedal. Attached Figure Description

[0024] Figure 1 This is a schematic diagram illustrating the overall structure of the foot switch according to an embodiment of this application;

[0025] Figure 2 This is a partial cross-sectional schematic diagram illustrating the triggering principle of the locking lever in an embodiment of this application;

[0026] Figure 3 This is a cross-sectional schematic diagram illustrating the internal structure of a foot switch according to an embodiment of this application;

[0027] Figure 4 This is a cross-sectional schematic diagram illustrating the working principle of the auxiliary support rod in an embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Foot pedal; 11. Anti-slip ridge; 12. Main support component; 13. Contact switch; 2. Fixed housing; 21. Anti-slip pad; 22. Sliding groove; 23. Locking rod; 24. Trigger wedge; 241. Trigger ramp; 25. Return component; 26. Auxiliary support rod; 3. Resting block; 4. First drive assembly; 41. First airbag; 42. First connecting pipe; 5. Second drive assembly; 51. Lowering block; 52. Second airbag; 53. Second connecting pipe; 6. Support cylinder; 61. Piston; 62. First chamber; 63. Second chamber. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0030] This application discloses a foot switch for a closed surgical instrument, referring to... Figure 1 and Figure 2 The foot switch for closed surgical instruments includes a foot pedal 1 and a fixed housing 2. The side wall of the fixed housing 2 surrounds the foot pedal 1. In this embodiment, there are two foot pedals 1, which can control different output functions respectively. In other embodiments of this application, the number of foot pedals 1 can be increased or decreased according to the actual required output functions, so that the foot switch can meet all the working conditions of the surgery. Generally, the number of foot pedals 1 is preferably controlled to be less than two, so that it is easy for doctors to distinguish and control the foot pedals 1.

[0031] The foot pedal 1 is inclined relative to the fixed housing 2, and the lower end of the foot pedal 1 is hinged to the fixed housing 2. A pivot is fixed on both sides of the lower end of the foot pedal 1, allowing the foot pedal 1 to rotate and connect to the fixed housing 2. The outward-facing top surface of the foot pedal 1 is flat and integrally formed with anti-slip protrusions 11. These protrusions 11 ensure sufficient friction between the foot and the sole of the shoe when the foot is pressed, preventing slippage. Simultaneously, an anti-slip pad 21 is attached to the bottom surface of the fixed housing 2. The anti-slip pad 21 effectively prevents the entire foot switch from moving when the foot pedal 1 is pressed, maintaining the stability of the foot switch during use.

[0032] The foot pedal 1 has a main support 12 and a contact switch 13 on its bottom surface. Both the main support 12 and the contact switch 13 are located between the foot pedal 1 and the fixed housing 2. The main support 12 can be a compression spring. The main support 12 is placed vertically, with its top end fixed to the bottom surface of the foot pedal 1 and its bottom end fixed to the bottom wall of the fixed housing 2. The contact switch 13 is spaced apart from the main support 12. The contact switch 13 can be located near the side of the foot pedal 1 with a lower height or near the side with a higher height. In this embodiment, the contact switch 13 is located near the side of the foot pedal 1 with a lower height. When the foot pedal 1 is pressed down to the trigger angle, the bottom surface of the foot pedal 1 contacts the contact switch 13 and presses the contact switch 13 down, thereby triggering the contact switch 13. At this time, the contact switch 13 can send a trigger signal to the control unit inside the external closed surgical instrument, thereby controlling the issuance of commands for the corresponding output function. The main support member 12 can provide an upward support force for the foot pedal 1, so that the foot pedal 1 is separated from the contact switch 13 in the initial state, and the contact switch 13 does not send out a signal.

[0033] Furthermore, refer to Figure 2 A footrest block 3 is provided between the two foot pedals 1, with the footrest block 3 spaced apart from the foot pedals 1. The footrest block 3 is vertically slidably connected to the fixed housing 2. The fixed housing 2 has a sliding groove 22 for the footrest block 3 to slide vertically. The surface of the footrest block 3 is also provided with anti-slip texture to enhance its anti-slip ability. A locking rod 23 is provided below the footrest block 3. There are two locking rods 23, both horizontally arranged, symmetrically distributed on both sides of the footrest block 3. Both locking rods 23 are horizontally slidably connected inside the fixed housing 2. Each of the two locking rods 23 corresponds to one foot pedal 1. When the foot pedal 1 is rotated to the position of the locking rod 23, the foot pedal 1 is not in contact with the contact switch 13.

[0034] A trigger wedge 24 is fixed to one end of the locking lever 23 near the rest block 3, and the trigger wedge 24 corresponds one-to-one with the locking lever 23. The top surface of the trigger wedge 24 is a trigger ramp 241, which gradually slopes downward away from the locking lever 23, and can contact the rest block 3. A first return member 25 is provided on the side of the trigger wedge 24 near the locking lever 23. The first return member 25 can be a compression spring. The first return member 25 is placed horizontally, with one end fixed to the side wall of the trigger wedge 24 and the other end fixed to the inner wall of the fixed housing 2.

[0035] In the initial state, the ends of the trigger wedges 24 corresponding to each of the two locking levers 23, away from the locking lever 23, are both in the sliding groove 22. When the footrest block 3 is stepped down, the footrest block 3 contacts the trigger inclined surface 241 and pushes the locking lever 23 out of the fixed housing 2 through the trigger wedge 24. At this time, the locking lever 23 is located on the rotation path of the foot pedal 1, and the locking lever 23 will restrict the rotation of the foot pedal 1. When the doctor does not need to operate the foot pedal 1, the doctor can place his foot on the footrest block 3. The footrest block 3 can provide a support for the doctor's foot to rest, so that the doctor's foot can get sufficient rest and relaxation during surgery. In addition, the footrest block 3 can provide a fixed resting position for the doctor's foot used to operate the foot switch. The doctor can place the foot used to operate the foot switch on the footrest block 3, thereby reducing the situation of accidentally touching the foot pedal 1. Meanwhile, when the doctor places their natural foot on the footrest block 3, a downward pressure is applied to the footrest block 3, causing it to move downward. During the downward movement of the footrest block 3, the locking lever 23 is pushed out of the fixed housing 2. At this time, even if external force is applied to the foot pedal 1, it cannot be pressed down, thus realizing the anti-accidental touch function of the foot pedal 1. When the foot is on the footrest block 3, it corresponds to the doctor's no-operation state. At this time, the foot pedal 1 cannot trigger the contact switch 13, making the foot switch safer and more reliable during use.

[0036] Furthermore, refer to Figure 3 and Figure 4 Since the main support member 12 is always under pressure when the foot pedal 1 is pressed, it may undergo permanent plastic deformation after prolonged use. This causes the support height provided by the main support member 12 to the foot pedal 1 to continuously decrease. When it decreases to a certain level, the foot pedal 1 may only require a small external force to rotate and trigger the contact switch 13, which can easily lead to accidental operation. Therefore, an auxiliary support rod 26, a first drive assembly 4, and a second drive assembly 5 are also provided below the foot pedal 1. The auxiliary support rod 26 is vertically slidably connected between the foot pedal 1 and the fixed housing 2. The top of the auxiliary support rod 26 can abut against the bottom surface of the foot pedal 1, thereby providing an upward auxiliary support force for the foot pedal 1.

[0037] The auxiliary support rod 26 has a support cylinder 6 and a piston 61 at its bottom. The support cylinder 6 is vertically fixed to the fixed housing 2 and is located on the side of the main support member 12 away from the contact switch 13. The piston 61 is vertically slidably connected inside the support cylinder 6. The bottom end of the auxiliary support rod 26 is fixedly connected to the top surface of the piston 61, so that the auxiliary support rod 26 can move up and down together with the piston 61. The auxiliary support rod 26 is slidably and sealingly connected to the support cylinder 6. The piston 61 divides the internal cavity of the support cylinder 6 into two independent chambers, a first chamber 62 and a second chamber 63. The first chamber 62 is located above the second chamber 63.

[0038] The first drive assembly 4 includes a first airbag 41 and a first connecting pipe 42, wherein the first airbag 41 is located below the rest block 3, one end of the first connecting pipe 42 is connected to the first chamber 62, and the other end of the first connecting pipe 42 is connected to the first airbag 41. The second drive assembly 5 includes a lower pressure block 51, a second airbag 52, and a second connecting pipe 53, wherein one end of the second connecting pipe 53 is connected to the second chamber 63, and the other end of the second connecting pipe 53 is connected to the second airbag 52, and the lower pressure block 51 is vertically slidably connected above the second airbag 52. At the same time, the support cylinder 6 is also provided with a second return member 25 in the second chamber 63. The second return member 25 can be a compression spring. The second return member 25 is vertically placed, and the top end of the second return member 25 abuts against the bottom surface of the piston 61, while the bottom end of the second return member 25 abuts against the inner bottom wall of the support cylinder 6.

[0039] In the initial state, no pressure is applied to the foot pedal 1 and the footrest block 3. At this time, the lower pressure block 51 presses down on the second airbag 52 by its own weight. After being compressed, the second airbag 52 will squeeze the air inside it into the second chamber 63 through the second connecting pipe 53. At this time, the increase in gas in the second chamber 63 increases the pressure in the second chamber 63. The pressure in the second chamber 63 is greater than the pressure in the upper first chamber 62, which pushes the piston 61 and the auxiliary support rod 26 upward together, so that the top of the auxiliary support rod 26 can abut against the foot pedal 1, thereby realizing the auxiliary support rod 26 to provide auxiliary support for the foot pedal 1. At this time, even if the main support member 12 is not enough to provide all the support force for the foot pedal 1, the auxiliary support rod 26 can provide auxiliary support for the foot pedal 1, so that the foot pedal 1 is not easy to contact the contact switch 13 in the natural state.

[0040] When pressure needs to be applied to the foot pedal 1, the doctor steps on it and presses down. This causes the foot pedal 1 to press down the auxiliary support rod 26, which in turn lowers the piston 61. The piston 61 then re-inflates the second airbag 52 from the second chamber 63 and draws gas from the first airbag 41 into the first chamber 62. The second airbag 52 then re-inflates, while the first airbag 41 deflates. The flow of gas within the first and second chambers 62 and 63 provides appropriate damping for the downward pressure of the foot pedal 1, making the process of the doctor pressing down on the foot pedal 1 smoother. When the doctor lifts their foot, the pressing block 51, under its own weight, compresses the second airbag 52. Simultaneously, the restoring force generated by the pressure on the second return element 25 pushes the piston 61, connected to the auxiliary support rod 26, upwards. This causes the auxiliary support rod 26 to re-abut against the foot pedal 1, applying auxiliary support force and effectively reducing the possibility of accidental activation. At this point, the first airbag 41 re-inflates. Then the doctor can step on the footrest block 3 and press down on the footrest block 3. At this time, the bottom of the footrest block 3 will squeeze the first airbag 41, and force the gas in the first airbag 41 into the first chamber 62, so that the auxiliary support rod 26 separates downward from the foot pedal 1. At the same time, the footrest block 3 pushes the two locking rods 23 out of the fixed shell 2 through the trigger wedge block 24. At this time, the locking rods 23 restrict the position of the foot pedal 1, which can also prevent accidental contact.

[0041] The implementation principle of a foot switch for a closed surgical instrument according to an embodiment of this application is as follows: When the doctor does not need to operate the foot pedal 1, the doctor can place his foot on the footrest block 3. The footrest block 3 provides support for the doctor's foot to rest, allowing the doctor's foot to rest and relax fully during surgery. When the doctor steps on the footrest block 3, he will press down on the footrest block 3. At this time, the bottom of the footrest block 3 pushes two locking rods 23 out of the fixed housing 2 through the trigger wedge block 24. At this time, the locking rods 23 restrict the position of the foot pedal 1, which can prevent accidental activation. When the doctor lifts his foot, the pressing block 51 compresses the second airbag 52 by its own weight. At the same time, the restoring force generated by the pressure on the second return member 25 pushes the piston 61 and the auxiliary support rod 26 upward, so that the auxiliary support rod 26 abuts against the foot pedal 1 again, applying auxiliary support force to the foot pedal 1, thereby effectively reducing the possibility of accidental activation.

[0042] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A foot switch for a closed surgical instrument, characterized in that: include The foot pedal and the fixed housing are arranged at an angle relative to the fixed housing, and the lower end of the foot pedal is hinged to the fixed housing. The main support and the contact switch are both located between the foot pedal and the fixed housing. The main support is used to support the foot pedal and make the foot pedal rebound. When the foot pedal is pressed, it triggers the contact switch and sends a trigger signal outward. The footrest block is movably connected to the fixed housing, and the footrest block and the foot pedal are spaced apart; The locking lever is located below the foot pedal. When the footrest is pressed down, the locking lever extends and abuts against the foot pedal to restrict the pedal from being pressed down.

2. The foot switch for closed surgical instruments according to claim 1, characterized in that: The resting block is vertically slidably connected to the fixed housing. The locking rod is horizontally set and located below the resting block. A trigger wedge is set at the end of the locking rod near the resting block. The top surface of the trigger wedge gradually tilts downward in the direction away from the locking rod. A first return member is set on the side of the trigger wedge near the locking rod to keep the locking rod retracted into the fixed housing.

3. The foot switch for closed surgical instruments according to claim 1, characterized in that: It also includes an auxiliary support mechanism, which includes an auxiliary support rod, a first drive assembly, and a second drive assembly. The auxiliary support rod is vertically slidably connected between the foot pedal and the fixed housing, and the top of the auxiliary support rod is used to abut against the bottom surface of the foot pedal. When the footrest is pressed down, the footrest drives the auxiliary support rod to descend through the first drive assembly, so that the auxiliary support rod disengages from the foot pedal; Conversely, the footrest block drives the auxiliary support rod to rise via the second drive assembly, so as to press against the bottom surface of the foot pedal.

4. The foot switch for closed surgical instruments according to claim 3, characterized in that: The auxiliary support mechanism also includes a support cylinder and a piston. The support cylinder is vertically fixed between the foot pedal and the fixed housing. The piston is vertically slidably connected inside the support cylinder. The auxiliary support rod is slidably and sealed to the support cylinder, and its bottom is fixed to the piston. The piston divides the internal cavity of the support cylinder into a first chamber and a second chamber. The first drive component charges and discharges air into the first chamber, and the second drive component charges and discharges air into the second chamber to drive the piston to move up and down.

5. The foot switch for closed surgical instruments according to claim 4, characterized in that: The first driving component includes a first airbag and a first connecting tube. One end of the first connecting tube is connected to the first chamber, and the other end of the first connecting tube is connected to the first airbag. The first airbag is correspondingly disposed below the footrest block. When the footrest block is stepped on, the first airbag is squeezed.

6. The foot switch for closed surgical instruments according to claim 4, characterized in that: The second drive assembly includes a pressure block, a second airbag, and a second connecting tube. One end of the second connecting tube is connected to the second chamber, and the other end of the second connecting tube is connected to the second airbag. The pressure block is vertically slidably connected above the second airbag. In the initial state, the pressure block presses the second airbag downwards by its own weight.

7. The foot switch for closed surgical instruments according to claim 6, characterized in that: The second drive assembly also includes a second return member, which is vertically placed in the second chamber. The top end of the second return member abuts against the bottom surface of the piston, while the bottom end abuts against the inner bottom wall of the support cylinder.

8. The foot switch for closed surgical instruments according to claim 1, characterized in that: The bottom wall of the fixed outer casing is provided with an anti-slip pad.

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