Pneumatic adjusting clamp holder for surgical lens

Abstract

The utility model discloses a pneumatic adjusting clamp holder for a surgical lens, and belongs to the technical field of medical instruments. The surgical lens holder overcomes the defects that in the prior art, a traditional surgical lens holder is small in adjusting range, cannot be controlled and operated with one hand, and is inconvenient to adjust in an operation. The main structure of the device comprises a bed beam fixing device, a host, a snakelike arm, a control button and a lens clamp, the bed beam fixing device is installed on a shell of the host, a tensioning mechanism is arranged in the host, one end of the snakelike arm penetrates through the shell of the host and then is connected with the tensioning mechanism, and the other end of the snakelike arm is connected with the lens clamp through the control button. The surgical lens clamping device is mainly used for clamping a surgical lens during surgery.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a pneumatic adjustment clamper for a surgical lens. Background Art

[0002] In recent years, with the increasing popularity and development of minimally invasive surgery and laparoscopic technology, the problem of endoscope lens stability has become increasingly prominent. During surgery, medical staff maintain a single mirror-holding action for a long time, which not only makes the arm muscles tense and tired, but also causes the endoscope lens to shake, thereby affecting the surgeon's surgical field of view and prolonging the operation time. Although traditional instrument holders can support the lens, they generally only have three joints, a small adjustment range, and cannot be controlled and operated with one hand, making intraoperative adjustment inconvenient.

[0003] For example, the Chinese utility model patent with authorization announcement number CN 216724766 U discloses a clamp with the function of universal fixation of surgical instruments. Although it can reduce the number of surgical personnel, and at the same time, a steel cable is arranged in the universal arm, the universal arm can be fixed by the steel cable after the position of the medical instrument is adjusted, thereby avoiding the position change or movement of the medical instrument due to its heavy weight. However, it has the following shortcomings: the rotation angle of the drive component cannot be adjusted, and the universal arm does not have sufficient flexible bending freedom, and the accuracy of the end positioning at the moment of locking cannot be improved, resulting in a large offset error. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a pneumatic adjustment clamp for a surgical lens.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A pneumatic adjustment clamp for a surgical lens comprises a bed beam fixing device, a main unit, a serpentine arm, a control button and a lens clamp. The bed beam fixing device is mounted on the main unit housing. A tensioning mechanism is provided in the main unit. One end of the serpentine arm passes through the main unit housing and is connected to the tensioning mechanism, while the other end is connected to the lens clamp via the control button.

[0007] Preferably, the serpentine arm includes a wire rope, a slipknot base and one or more spherical slipknots, one end of the spherical slipknot is provided with a conical inner channel, and when two adjacent spherical slipknots are assembled, the ball head of the rear spherical slipknot is installed in the conical inner channel of the front spherical slipknot, and the top end of the wire rope is connected to the control button through the spherical slipknot at the head end of the serpentine arm, and after the wire rope passes through more than one spherical slipknot in turn, the end of the wire rope passes through the slipknot base and is connected to the wire rope fixing block, and the wire rope fixing block is installed on the tensioning mechanism.

[0008] Preferably, the tensioning mechanism includes a boss, a pull rod and a cylinder arranged inside the main machine. The middle part of the pull rod is hingedly connected to the boss through a second pin shaft. One end of the pull rod is connected to the telescopic rod on the cylinder through a rotating wheel. A spring is arranged between the other end of the pull rod and the inner wall of the main machine, and the spring is sleeved on the wire rope. The wire rope fixing block is connected to the pull rod.

[0009] Preferably, the bed beam fixing device includes an angle adjustment mechanism for adjusting the angle of the main unit and a locking mechanism for fixing the main unit on the side rails of the operating bed.

[0010] Preferably, the locking mechanism includes an upper locking block, a lower locking block, an inner screw, a bed beam locking handle and a limit block. The lower locking block is hingedly connected to the upper locking block through a pin shaft. One end of the inner screw is connected to the lower locking block, and the other end passes through the outer shell of the main unit and is connected to the bed beam locking handle. A limit block is set between the bed beam locking handle and the outer shell of the main unit.

[0011] Preferably, the angle adjustment mechanism includes a fixed block, a hollow screw and an angle locking handle. The fixed block is mounted on the outer shell of the main unit by screws, and the fixed block is connected to one end of the hollow screw. The other end of the hollow screw passes through the outer shell of the main unit and is connected to the angle locking handle. A pad is provided between the angle locking handle and the outer shell of the main unit.

[0012] Preferably, the inner screw is installed inside the hollow screw, and one end of the inner screw is provided with an outer thread, and the interior of the hollow screw is provided with an inner thread for matching with the outer thread on the inner screw.

[0013] Preferably, an outer surface of one end of the hollow screw is provided with an external thread, and the angle locking handle is threadably connected to the hollow screw via the external thread on the hollow screw and the internal thread on the angle locking handle.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The control button is installed on the top of the snake-shaped arm. You can press the control button with one hand and drag it to adjust the position at the same time, which is ergonomic.

[0016] 2. The bed beam fixing device has two locking handles, which can independently adjust the rotation angle of the main unit and fix it to the surgical bed rail. The two locking handles rely on screws to transmit movement. The outer bed beam locking handle is used to fix the main unit to the surgical bed rail, and the inner angle locking handle can adjust the left and right rotation angle of the main unit.

[0017] 3. The inner diameter of the spherical slipknot hole is larger than the diameter of the wire rope. The diameter of the inner channel of the cylindrical part gradually increases from the inside to the outside. It is a tapered structure. This not only increases the contact surface between the spherical slipknots, but also enables the serpentine arm to have sufficient flexible bending freedom when the contact angle of two adjacent spherical slipknots is changed. This can improve the accuracy of the end positioning at the moment of locking and reduce the offset error.

[0018] To sum up, the utility model has a stable structure, is easy to use, and is flexible to operate. The field of view during surgery is stable and does not shake. The main unit can adjust the rotation angle, and can control the serpentine arm to move freely to various positions and maintain the final movement position, replacing manual support of the mirror, and solving the problems of limited adjustment range and inconvenient control of existing ordinary instrument brackets. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is an internal cross-sectional view of the serpentine arm in the present invention;

[0021] Figure 3 This is a schematic diagram of the external structure of the serpentine arm in the present utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the tensioning mechanism and the wire rope end when they are installed in the utility model;

[0023] Figure 5 It is a structural schematic diagram of the bed beam fixing device in the utility model.

[0024] In the figure: 1. Bed beam fixing device; 2. Main unit; 3. Serpentine arm; 4. Control button; 5. Lens clamp; 6. Operating bed side rail; 7. External air tube; 10. Upper locking block; 11. Lower locking block; 12. Pin shaft 1; 13. Fixing block; 14. Inner screw; 15. Hollow screw; 16. Spacer; 17. Angle locking handle; 18. Bed beam locking handle; 19. Limit block; 20. Wire rope; 21. Spherical slipknot; 22. Slipknot base; 211. Conical inner channel; 23. Pull rod; 24. Spring; 25. Tensioning mechanism; 26. Wire rope fixing block; 27. Pin shaft 2; 28. Boss; 29. ​​Rotating wheel; 30. Cylinder; 31. Telescopic rod. DETAILED DESCRIPTION

[0025] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0026] Example 1:

[0027] like Figure 1As shown, a pneumatic adjustment clamp for a surgical lens includes a bed beam fixing device 1, a main unit 2, a serpentine arm 3, a control button 4, and a lens clamp 5. The bed beam fixing device 1 is mounted on the housing of the main unit 2. A tensioning mechanism 25 is provided in the main unit 2. One end of the serpentine arm 3 passes through the housing of the main unit 2 and is connected to the tensioning mechanism 25. The other end is connected to the lens clamp 5 via the control button 4.

[0028] Example 2:

[0029] like Figure 2-3 As shown, a pneumatic adjustment clamp for a surgical lens is different from Example 1 in that the serpentine arm 3 includes a wire rope 20, a slipknot base 22 and one or more spherical slipknots 21, and one end of the spherical slipknot 21 is provided with a conical inner channel 211. When two adjacent spherical slipknots 21 are assembled, the ball head of the latter spherical slipknot 21 is installed in the conical inner channel 211 of the former spherical slipknot 21, and the top end of the wire rope 20 is connected to the control button 4 through the spherical slipknot 21 at the head end of the serpentine arm 3. After the wire rope 20 passes through one or more spherical slipknots 21 in sequence, the end of the wire rope 20 passes through the slipknot base 22 and is connected to the wire rope fixing block 26, and the wire rope fixing block 26 is installed on the tensioning mechanism 25.

[0030] In this embodiment, the serpentine arm 3 is a component connecting the main body 2 and the lens clamp 5, and plays an important regulating and supporting role in the entire product. It is a slipknot soft shaft structure, in which one end of the slipknot base 22 is a ball head and the other end is a cylinder. The interior is a hollow structure with an inner diameter larger than the diameter of the wire rope 20, ensuring that when the contact angle of the two adjacent spherical slipknots 21 changes, the wire rope 20 has space to bend, wherein the diameter of the inner channel of the cylindrical part gradually increases from the inside to the outside, forming a cone shape; when the adjacent spherical slipknots 21 are assembled, the ball head of the rear spherical slipknot 21 extends into the conical inner channel 211 of the cylinder of the previous spherical slipknot 21, and the top end of the wire rope 20 is connected and fixed to the top end of the serpentine arm 3, that is, the first spherical slipknot 21, and passes through the through holes of each spherical slipknot 21 in turn like threading beads, and the end passes through the bottom end of the slipknot base 22 and is connected to the wire rope fixing block 26.

[0031] When the wire rope 20 is relaxed or the tension is small, the friction between the spherical slip knots 21 is small, and a small external force is applied to the two spherical slip knots 21 to produce a certain angle change. The more slip knots there are, the more flexible the angle and range of the serpentine arm 3 will be. When the wire rope 20 is tightened, the ball head of the rear spherical slip knot 21 and the cylindrical conical inner channel 211 of the front spherical slip knot 21 will produce greater extrusion and friction, thereby limiting the angle change between the two slip knots. The serpentine arm 3 will thus harden and play a fixing and supporting role. The tensioning force of the wire rope 20 comes from the action of the tensioning mechanism 25 inside the main unit 2.

[0032] like Figure 4 As shown, the tensioning mechanism 25 includes a boss 28, a pull rod 23 and a cylinder 30 arranged inside the main unit 2. The middle part of the pull rod 23 is hingedly connected to the boss 28 through a pin 27. One end of the pull rod 23 is connected to the telescopic rod 31 on the cylinder 30 through a rotating wheel 29. A spring 24 is arranged between the other end of the pull rod 23 and the inner wall of the main unit 2, and the spring 24 is sleeved on the wire rope 20. The wire rope fixing block 26 is connected to the pull rod 23.

[0033] In this embodiment, the main unit 2 is a rectangular parallelepiped structure, formed by two thin shells butted together and secured with screws. The outer shell at the top of the main unit 2 is connected to the slipknot base 22 of the serpentine arm. The bottom of the shell is connected to the cylinder 30, also secured by screws. The telescopic rod 31 of the cylinder 30 extends into the interior of the main unit 2 shell. Specifically, a compressed preload spring 24 is also housed within the main unit 2 shell. Its upper portion presses against the main unit 2 shell, while its lower portion presses against the tensioning mechanism 25. This keeps the wire rope 20 slightly taut, allowing for some movement between the slipknots of the serpentine arm 3 without causing excessive looseness. The tensioning mechanism 25 is equivalent to a lever structure, which is hingedly fixed to the inside of the main body 2 shell by the hole on the boss 28 and the second pin 27, and can rotate around the second pin 27. One side presses the wire rope fixing block 26, which can convert the thrust of the telescopic rod 31 of the cylinder 30 into a pulling force on the wire rope 20. The position of the second pin 27 of the tensioning mechanism 25 is located on one side of the entire structure, which can amplify the force like a lever. Under the premise of the same gas pressure or cylinder size, it can generate greater pulling force on the wire rope 20.

[0034] In addition, a rotating wheel 29 is provided on the upper portion of the telescopic rod 31 of the cylinder 30 , which contacts with the concave surface of the pull rod 23 . The rotating wheel 29 can reduce the friction of the contact surface when transmitting the thrust. When compressed air is introduced, the telescopic rod 31 of the cylinder 30 moves upward, and the outer cylindrical surface of the rotating wheel 29 contacts the concave surface of the pull rod 23 and pushes upward, so that the pull rod 23 has a tendency to rotate counterclockwise and tightens the wire rope 20. When the wire rope 20 is in a tensioned state, the friction between each spherical knot 21 becomes greater, the overall hardness of the serpentine arm 3 becomes stronger, and the supporting strength also becomes greater; when the control button 4 is pressed, the cylinder 30 no longer generates thrust. At this time, only the elastic force of the compressed spring 24 takes effect, so that the wire rope 20 is only in a slightly tensioned state. The entire serpentine arm 3 has a certain bending and mobility, and can be adjusted in angle and shape. When the control button 4 is released, the cylinder 30 resumes action, and the telescopic rod 31 of the cylinder 30 moves upward. The serpentine arm 3 regains its hardness in the current state and plays a supporting role.

[0035] Furthermore, the bed beam fixing device 1 includes an angle adjustment mechanism for adjusting the angle of the main unit 2 and a locking mechanism for fixing the main unit 2 on the operating bed side rail 6.

[0036] like Figure 5 As shown, the locking mechanism includes an upper locking block 10, a lower locking block 11, an inner screw 14, a bed beam locking handle 18, and a limit block 19. The lower locking block 11 is hingedly connected to the upper locking block 10 via a pin 12. One end of the inner screw 14 is connected to the lower locking block 11, and the other end passes through the outer shell of the main unit 2 and is connected to the bed beam locking handle 18. A limit block 19 is provided between the bed beam locking handle 18 and the outer shell of the main unit 2. The angle adjustment mechanism includes a fixed block 13, a hollow screw 15, and an angle locking handle 17. The fixed block 13 is mounted on the outer shell of the main unit 2 by screws, and the fixed block 13 is connected to one end of the hollow screw 15. The other end of the hollow screw 15 passes through the outer shell of the main unit 2 and is connected to the angle locking handle 17. A spacer 16 is provided between the angle locking handle 17 and the outer shell of the main unit 2. The internal screw 14 is installed inside the hollow screw 15, and one end of the internal screw 14 is provided with an external thread, and the interior of the hollow screw 15 is provided with an internal thread for matching with the external thread on the internal screw 14; the outer surface of one end of the hollow screw 15 is provided with an external thread, and the angle locking handle 17 is threadedly connected to the hollow screw 15 through the external thread on the hollow screw 15 and the internal thread on the angle locking handle 17.

[0037] In this embodiment, the lower locking block 11 is a movable locking block, which is installed on the upper locking block 10 through a pin shaft 12 and can rotate around the pin shaft 12. The right side of the upper locking block 10 is processed with grooves with uniform angles, and it is an integrated structure with the hollow screw 15 on the right side. The fixed block 13 is fixed to the outer shell of the main unit 2 by screws. The fixed block 13 has a raised frustum and a surface processed with protruding teeth with uniform angles, which can match the grooves of the upper locking block 10. The fixed block 13 has a through hole with a hole diameter larger than the diameter of the hollow screw 15 to ensure that the hollow screw 15 passes through. Since the inner and outer surfaces of the right section of the hollow screw 15 are both processed with threads, the external threads cooperate with the internal threads of the angle locking handle 17. When the angle locking handle 17 is rotated clockwise, the gap between the upper locking block 10 and the fixed block 13 will become larger. When it is greater than the height of the boss, the main unit 2 can be rotated to adjust the angle between it and the upper locking block 10. When the angle locking handle 17 is rotated clockwise, it moves to the left and contacts the cushion block 16, and pushes the cushion block 16 and the main unit 2 to move to the left. Since the hollow screw 15 is integrated with the upper locking block 10 and cannot move left and right, the angle locking handle 17 is continued to be rotated clockwise, and the main unit 2 is pushed to the left, while driving the fixed block 13 to press the upper locking block 10, fixing the adjusted angle. The inner screw 14 is located inside the hollow screw 15, and its right section has an external thread that cooperates with the internal thread inside the hollow screw 15. When the bed beam locking handle 18 is rotated clockwise, since the hollow screw 15 and the upper locking block 10 remain fixed as a whole, the inner screw 14 will move to the right, and at the same time drive the lower locking block 11 to rotate around the pin 12. During this process, the opening gradually becomes smaller. When the upper and lower locking blocks contact the bed rails, they continue to rotate with force, and eventually they will be clamped on the operating bed side rail 6 from both the upper and lower directions.

[0038] The working principle of this utility model is:

[0039] The utility model controls the entry of compressed gas into the cylinder 30 through a manual control button 4. Specifically, the external air source of the cylinder 30 is connected through an external air pipe 7, and the rod cavity and the rodless cavity of the cylinder 30 are both connected to the control button 4 through the air pipe. The air pipe is connected to the control button 4 along the outer side of the serpentine arm 3 through a pipe clamp, so that the telescopic rod 31 of the cylinder 30 generates thrust, and the force is amplified and the steel wire rope 20 is pulled by the tension of the steel wire rope 20 and the spherical slipknot 21 to achieve the effect of controlling the softness and hardness of the serpentine arm 3. The purpose of adjusting and fixing the lens holder and the lens position is achieved by utilizing the relaxed state of the serpentine arm 3 when the gas is cut off and the tightened state when the gas is ventilated.

[0040] The installation process of this utility model is:

[0041] The present invention is first installed on the operating bed beam. First, the beam locking handle 18 is rotated counterclockwise. At this time, the openings of the upper and lower locking blocks will gradually become larger, and the locking bayonet can be buckled on the operating bed side rail 6. Then, the beam locking handle 18 is rotated clockwise. The openings of the upper and lower locking blocks gradually become smaller. When the upper and lower locking blocks are in contact with the bed rail, the beam locking handle 18 is rotated continuously. The upper and lower locking blocks will eventually clamp the side rail from both the upper and lower directions together with the fixing block 13. In this way, the main unit 2 is installed and fixed to the operating bed. To adjust the rotation angle of the main unit 2, the angle locking handle 17 is first rotated counterclockwise to gradually separate the tooth grooves of the main unit 2 from the tooth grooves of the upper and lower locking blocks. At this time, the upper and lower locking blocks remain firmly clamped to the bed beam guide rail, and the main unit 2 can be rotated. After adjusting the rotation to the appropriate angle and aligning the tooth grooves of the main unit 2 with the tooth grooves of the upper and lower locking blocks again, the angle locking handle 17 is rotated clockwise to fix the angle of the main unit 2.

[0042] The operating process of this utility model:

[0043] The cylinder 30 is connected to the air source through the external air pipe 7, and the cylinder 30 will immediately operate to tighten the wire rope 20. The serpentine arm 3 is now in a taut support state. If you want to adjust the shape and position of the serpentine arm 3, you can hold the top of the serpentine arm 3 and press the control button 4. At this time, the air pressure inside the cylinder 30 is balanced, the telescopic rod 31 and the tensioning mechanism 25 no longer exert tension on the wire rope 20, and the serpentine arm 3 will be in a relaxed state. The serpentine arm 3 can be dragged and adjusted to any position. After reaching the desired position, release the control button 4, the upper part of the cylinder 30 will be depressurized, and the lower part will be acted upon by the compressed air. The cylinder 30 will instantly recover power and exert a pulling force on the wire rope 20 through the tensioning mechanism 25. The serpentine arm 30 will return to the tightened state and will not move. The shape and position will remain at the last position when the control button 4 was released. The serpentine arm 30 has the ability to support a certain load and resist deformation due to external forces, thereby achieving the function of fixing the endoscope lens, replacing manual support of the endoscope, and overcoming the problems of limited adjustment range and low degree of freedom of existing ordinary instrument supports.

Claims

1. A pneumatically adjustable clamp for a surgical lens, characterized in that: The invention comprises a bed beam fixing device (1), a main unit (2), a serpentine arm (3), a control button (4) and a lens clamp (5). The bed beam fixing device (1) is mounted on the housing of the main unit (2); a tensioning mechanism (25) is provided in the main unit (2); one end of the serpentine arm (3) passes through the housing of the main unit (2) and is connected to the tensioning mechanism (25); and the other end of the serpentine arm (3) is connected to the lens clamp (5) via the control button (4).

2. The pneumatic adjustment clamp for a surgical lens according to claim 1, characterized in that: The serpentine arm (3) comprises a steel wire rope (20), a slipknot base (22) and one or more spherical slipknots (21). One end of the spherical slipknot (21) is provided with a tapered inner hole (211). When two adjacent spherical slipknots (21) are assembled, the ball head of the latter spherical slipknot (21) is installed in the tapered inner hole (211) of the former spherical slipknot (21). The top end of the steel wire rope (20) is connected to the control button (4) through the spherical slipknot (21) at the head end of the serpentine arm (3). After the steel wire rope (20) passes through the one or more spherical slipknots (21) in sequence, the end of the steel wire rope (20) passes through the slipknot base (22) and is connected to the steel wire rope fixing block (26). The steel wire rope fixing block (26) is installed on the tensioning mechanism (25).

3. The pneumatic adjustment clamp for a surgical lens according to claim 2, characterized in that: The tensioning mechanism (25) includes a boss (28), a pull rod (23) and a cylinder (30) arranged inside the main machine (2). The middle part of the pull rod (23) is hingedly connected to the boss (28) through a second pin (27). One end of the pull rod (23) is connected to a telescopic rod (31) on the cylinder (30) through a rotating wheel (29). A spring (24) is provided between the other end of the pull rod (23) and the inner wall of the main machine (2), and the spring (24) is sleeved on the wire rope (20). The wire rope fixing block (26) is connected to the pull rod (23).

4. The pneumatic adjustment clamp for a surgical lens according to any one of claims 1 to 3, characterized in that: The bed beam fixing device (1) comprises an angle adjustment mechanism for adjusting the angle of the main machine (2) and a locking mechanism for fixing the main machine (2) on the operating bed side rail (6).

5. The pneumatic adjustment clamp for a surgical lens according to claim 4, characterized in that: The locking mechanism comprises an upper locking block (10), a lower locking block (11), an inner screw (14), a bed beam locking handle (18) and a limit block (19); the lower locking block (11) is hingedly connected to the upper locking block (10) via a pin (12); one end of the inner screw (14) is connected to the lower locking block (11), and the other end passes through the outer shell of the main unit (2) and is connected to the bed beam locking handle (18); a limit block (19) is provided between the bed beam locking handle (18) and the outer shell of the main unit (2).

6. The pneumatic adjustment clamp for a surgical lens according to claim 5, characterized in that: The angle adjustment mechanism comprises a fixed block (13), a hollow screw (15) and an angle locking handle (17); the fixed block (13) is mounted on the housing of the main unit (2) by means of screws, and the fixed block (13) is fixedly connected to one end of the hollow screw (15); the other end of the hollow screw (15) passes through the housing of the main unit (2) and is connected to the angle locking handle (17); a spacer (16) is provided between the angle locking handle (17) and the housing of the main unit (2).

7. The pneumatic adjustment clamp for a surgical lens according to claim 6, characterized in that: The inner screw (14) is installed inside the hollow screw (15), and one end of the inner screw (14) is provided with an outer thread, and the interior of the hollow screw (15) is provided with an inner thread for matching with the outer thread on the inner screw (14).

8. The pneumatic adjustment clamp for a surgical lens according to claim 7, characterized in that: An outer surface of one end of the hollow screw (15) is provided with an external thread, and the angle locking handle (17) is threadedly connected to the hollow screw (15) through the external thread on the hollow screw (15) and the internal thread on the angle locking handle (17).

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