Foldable minimally invasive operating forceps with bistable performance

Abstract

The invention relates to the technical field of medical minimally invasive instruments, and discloses a pair of foldable minimally invasive operating forceps with bistable performance, which comprises a forceps body and a bistable foldable forceps head mechanism, the forceps body is fixedly connected with a forceps rod through a locking sleeve, a traction rod is slidably connected in the forceps rod, and the bistable foldable forceps head mechanism is fixedly connected with the forceps body through the locking sleeve. The left end of the forceps rod is connected with the bistable foldable forceps head mechanism, the bistable foldable forceps head mechanism comprises a fixing ring, a fixing plate and a forceps head assembly, the fixing ring is fixedly connected to the outer wall of the left end of the forceps rod in a matched mode, and the fixing plate is fixedly connected to the left end of the traction rod in a matched mode; and four groups of tong head assemblies are connected between the fixing ring and the fixing plate at equal intervals on the circumference. By arranging the bistable foldable forceps head mechanism, the traction rod slides and the connecting plate is pushed to rotate by applying force through the handle, so that the forceps head is closed and stably kept, the stability and accuracy of an operation are ensured, the force control requirement of a user is reduced, and the accuracy and safety of the operation are improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical minimally invasive instruments, in particular to a foldable minimally invasive surgical forceps with bistable performance. Background Art

[0002] With the development of modern medicine, minimally invasive surgery has gradually become one of the important ways of clinical surgical treatment, especially in the case of reducing trauma and accelerating recovery, minimally invasive technology has shown great advantages. Minimally invasive surgery usually relies on precise surgical instruments and high-precision operation techniques, and the performance of surgical instruments is directly related to the surgical effect, operation safety and patient recovery speed.

[0003] For example, Chinese patent CN202411021827.0 discloses a minimally invasive surgical forceps and grasping forceps device, including a first clamping head, a second clamping head, a reset drive, a closing drive and a drive control component. The elastic force support of the reset drive enables the first clamping head and the second clamping head to always maintain a reset and open state in the absence of external force. No special control by the operator is required, which simplifies the operation steps and reduces the difficulty of operation.

[0004] However, the minimally invasive surgical forceps rely on the user's continuous force to maintain the state of the instrument. When the user's hand strength is not properly controlled, it is easy to cause the state of the surgical forceps to be unstable, affecting the accuracy of the operation and may even cause unnecessary damage to the patient's tissue. This will affect the control of the forceps state, especially in long-term operations or when continuous pressure needs to be applied.

[0005] Based on this, the present invention designs a foldable minimally invasive surgical forceps with bistable performance to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a foldable minimally invasive surgical forceps with bistable performance to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a foldable minimally invasive surgical forceps with bistable performance, comprising a forceps body and a bistable foldable forceps head mechanism, the left end of the forceps body is threadedly connected with a locking sleeve, the forceps body is fixedly connected to a forceps rod through the locking sleeve, a traction rod is slidably connected in the forceps rod, the left end of the forceps rod is connected with a bistable foldable forceps head mechanism, the bistable foldable forceps head mechanism comprises a fixing ring, a fixing plate and a forceps head assembly, the fixing ring is matched and fixedly connected to the outer wall of the left end of the forceps rod, the fixing plate is matched and fixedly connected to the left end of the traction rod, four groups of forceps head assemblies are connected circumferentially with equal intervals between the fixing ring and the fixing plate, the right end of the forceps body is connected to a handle assembly, and an endoscope is fixedly installed at the center position of the left side of the fixing plate;

[0008] The pliers head assembly includes an L-shaped connecting plate, a stabilizing plate and a limiting plate. The L-shaped connecting plate is an integrally formed right-angle structure with unequal length sides, wherein the long side of the bottom of the L-shaped connecting plate is arranged parallel to the stabilizing plate, and the limiting plate is connected between the corner of the L-shaped connecting plate and one end corresponding to the stabilizing plate.

[0009] Preferably, the bottom end of the limiting plate is fixedly connected to the side wall of the fixing plate, the top end of the limiting plate is rotatably connected to an L-shaped connecting plate via a hinge, and the bottom end of the limiting plate is rotatably connected to a stabilizing plate via a hinge.

[0010] Preferably, the pliers head assembly also includes a short plate, a pliers arm and a pliers plate, the top end of the short plate is rotatably connected to the side wall of the fixed ring through a hinge, the bottom end of the short plate is rotatably connected to the top end of the short side of the L-shaped connecting plate through a hinge, and the bottom end of the pliers arm is fixedly connected to the pliers plate.

[0011] Preferably, the top end of the clamp arm is rotatably connected to the bottom end of the long side of the L-shaped connecting plate through a hinge, and the bottom end of the clamp arm is rotatably connected to an end of the stabilizing plate away from the fixed plate through a hinge.

[0012] Preferably, the clamp arm is arranged in parallel with the limiting plate, and the clamp arm and the limiting plate have the same length.

[0013] Preferably, the long side of the L-shaped connecting plate is the same length as that of the stabilizing plate, and the L-shaped connecting plate, the stabilizing plate, the limiting plate and the clamp arm together form a parallelogram structure.

[0014] Preferably, the handle assembly includes a fixed handle, a movable handle and an arc-shaped spring piece, the fixed handle is fixedly connected to the right end of the caliper body, the fixed handle is hinged with a movable handle, the movable handle is connected to a tension retainer in the caliper body, and an arc-shaped spring piece is fixedly connected between the fixed handle and the movable handle.

[0015] Preferably, the handle assembly is connected to the caliper body via a tension retainer, and the handle assembly is also connected to the traction rod via a tension retainer.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0017] First, the present invention sets a bistable foldable clamp head mechanism. The handle assembly applies force to make the traction rod slide along the clamp rod, and then push the L-shaped connecting plate to rotate around the stabilizing plate, so that the four groups of clamp head assemblies 503 are brought closer to each other, and the clamp heads are closed. After closing, they can be stably maintained in a clamping state and will not open automatically even in the absence of continuous external force, thereby ensuring stability and accuracy during the operation. The bistable mechanism is used to make the surgical forceps stably maintain both the open and closed states during the operation, thereby reducing the user's hand strength control requirements, improving the accuracy and safety of the operation, and can be retracted and folded, and can be quickly unfolded and used when needed, thereby improving the portability and practicality of the surgical instrument.

[0018] Second, the present invention further improves the visualization of the operation by installing an endoscope on the left side of the fixing plate, and the endoscope extends to the front of the clamp head assembly through the hole at the center of the fixing plate, so as to facilitate observation of the working status of the clamp head assembly and the operating area, so as to enable the doctor to obtain a clear field of view during the operation and observe the operating area more accurately, thereby improving the safety and success rate of the operation and further improving the surgical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the present invention from another perspective;

[0021] Figure 3 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0022] Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 5 It is a structural schematic diagram of the bistable foldable clamp head mechanism of the present invention;

[0024] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 7 It is a structural schematic diagram of the clamp head assembly in the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the handle assembly in the present invention.

[0027] Wherein: 1. Clamp body; 2. Locking sleeve; 3. Clamp rod; 4. Pull rod; 5. Bistable foldable clamp head mechanism; 501. Fixed ring; 502. Fixed plate; 503. Clamp head assembly; 5031. L-shaped connecting plate; 5032. Stabilizing plate; 5033. Limiting plate; 5034. Short plate; 5035. Clamp arm; 5036. Clamp plate; 6. Handle assembly; 601. Fixed handle; 602. Movable handle; 603. Arc-shaped spring piece; 7. Endoscope. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] See also Figure 1 - Figure 5 Embodiment 1 is described. In the figure, a foldable minimally invasive surgical forceps with bistable performance comprises a forceps body 1 and a bistable foldable forceps head mechanism 5. The left end of the forceps body 1 is threadedly connected with a locking sleeve 2. The forceps body 1 is fixedly connected with a forceps rod 3 through the locking sleeve 2. A traction rod 4 is slidably connected in the forceps rod 3. The left end of the forceps rod 3 is connected with a bistable foldable forceps head mechanism 5. The bistable foldable forceps head mechanism 5 comprises a fixing ring 501, a fixing plate 502 and a forceps head assembly 503. The fixing ring 501 is matched and fixedly connected to the outer wall of the left end of the forceps rod 3. The fixing plate 502 is matched and fixedly connected to the left end of the traction rod 4. Four groups of forceps head assemblies 503 are connected at equal intervals between the fixing ring 501 and the fixing plate 502. The right end of the forceps body 1 is connected with a handle assembly 6. An endoscope 7 is fixedly installed at the center position of the left side of the fixing plate 502.

[0031] The clamp head assembly 503 includes an L-shaped connecting plate 5031, a stabilizing plate 5032 and a limiting plate 5033. The L-shaped connecting plate 5031 is an integrally formed right-angle structure with unequal length sides, wherein the long side of the bottom of the L-shaped connecting plate 5031 is arranged parallel to the stabilizing plate 5032, and the limiting plate 5033 is connected between the corner of the L-shaped connecting plate 5031 and one end corresponding to the stabilizing plate 5032;

[0032] See also Figure 4 and Figure 5 , the bottom end of the limiting plate 5033 shown in the figure is fixedly connected to the side wall of the fixing plate 502, the top end of the limiting plate 5033 is rotatably connected to the L-shaped connecting plate 5031 through a hinge, and the bottom end of the limiting plate 5033 is rotatably connected to the stabilizing plate 5032 through a hinge;

[0033] In this embodiment, during the use of surgical forceps, when it is necessary to clamp tissue, the user can apply force through the handle assembly 6 to make the traction rod 4 slide along the clamp rod 3, thereby pushing the L-shaped connecting plate 5031 of the bistable foldable clamp head mechanism 5 to rotate around the stabilizing plate 5032 to achieve the closure of the clamp head. Due to the bistable foldable clamp head mechanism 5, the four groups of clamp head assemblies 503 are close to each other and can be stably maintained in the clamping state after closing, and will not open automatically even in the absence of continuous external force, thereby ensuring stability and accuracy during the operation. The limit plate 5033 is hingedly connected to the fixed plate 502, which enables the forceps head to be accurately positioned when closed, avoiding excessive squeezing or damage to the tissue. The provision of the endoscope 7 further improves the visualization of the operation, allowing the user to observe the operation area more accurately, thereby improving the safety and success rate of the operation. After the operation is completed, the user can reversely operate the handle assembly 6 to make the traction rod 4 slide in the opposite direction along the forceps rod 3, thereby pushing the forceps head assembly 503 to open and complete the release of the tissue. The entire operation process is simple and intuitive, which greatly reduces the difficulty of the operation and improves the efficiency of the operation.

[0034] Specifically, the bistable foldable forceps head mechanism 5 is the core part that makes the surgical forceps foldable and retractable. It is used as a joint structure to allow the forceps head assembly 503 to be folded and unfolded within a certain angle range, so that the surgical forceps can maintain its shape in two stable states and can be switched by external force control of the handle assembly 6 when necessary. The endoscope 7 extends to the front of the forceps head assembly 503 through the hole at the center of the fixed plate 502 to facilitate observation of the working state of the forceps head assembly 503 and the surgical area.

[0035] Example 2

[0036] See also Figure 6 and Figure 7 Example 2 is described. This embodiment further describes Example 1. In the figure, the clamp head assembly 503 also includes a short plate 5034, a clamp arm 5035 and a clamp plate 5036. The top of the short plate 5034 is rotatably connected to the side wall of the fixing ring 501 through a hinge. The bottom end of the short plate 5034 is rotatably connected to the top of the short side of the L-shaped connecting plate 5031 through a hinge. The bottom end of the clamp arm 5035 is fixedly connected to the clamp plate 5036.

[0037] Furthermore, the top end of the clamp arm 5035 is rotatably connected to the bottom end of the long side of the L-shaped connecting plate 5031 through a hinge, and the bottom end of the clamp arm 5035 is rotatably connected to the end of the stabilizing plate 5032 away from the fixing plate 502 through a hinge;

[0038] Furthermore, the clamp arm 5035 is arranged in parallel with the limiting plate 5033, and the clamp arm 5035 and the limiting plate 5033 have the same length;

[0039] Furthermore, the long side of the L-shaped connecting plate 5031 is the same length as the stabilizing plate 5032, and the L-shaped connecting plate 5031, the stabilizing plate 5032, the limiting plate 5033 and the clamp arm 5035 are enclosed to form a parallelogram structure;

[0040] In this embodiment, when the surgical forceps are unfolded and folded, the various components can work together to maintain the stability and accuracy of the forceps head. During the use of the surgical forceps, the movement of the traction rod 4 in the forceps rod 3 can be controlled by operating the handle assembly 6, thereby driving the expansion and contraction of the forceps head assembly 503. When the traction rod 4 moves to the left, the bistable foldable forceps head assembly 503 will unfold, increase the clamping area, and provide a stronger grip; conversely, when the traction rod 4 moves to the right, the forceps head assembly 503 will contract, reduce the clamping area, and facilitate delicate operations. In addition, the design of the handle assembly 6 allows the user to easily control the state of the surgical forceps through hand strength, and can maintain stable control even during long-term operation or when continuous pressure is required, thereby reducing the risk of damage to patient tissues.

[0041] Specifically, when the traction rod 4 moves to the left, the bistable foldable forceps head assembly 503 will unfold, increase the clamping area, and provide a stronger gripping force; conversely, when the traction rod 4 moves to the right, the forceps head assembly 503 will shrink, reduce the clamping area, and facilitate fine operation. The L-shaped connecting plate 5031, the stabilizing plate 5032, the limit plate 5033 and the forceps arm 5035 are combined to form a parallelogram structure, so that the four bistable foldable forceps head mechanisms 5 form a bistable structure and can be folded and unfolded, ensuring that when the surgical forceps are unfolded and folded, the various components can work together to maintain the stability and accuracy of the forceps head.

[0042] Example 3

[0043] See also Figure 1 and Figure 8 Example 3 is described. This embodiment further describes Example 2. In the figure, the handle assembly 6 includes a fixed handle 601, a movable handle 602 and an arc-shaped spring piece 603. The fixed handle 601 is fixedly connected to the right end of the pliers body 1. The fixed handle 601 is matched with a movable handle 602 hingedly connected. The movable handle 602 is connected to a tension retainer in the pliers body 1. The arc-shaped spring piece 603 is fixedly connected between the fixed handle 601 and the movable handle 602.

[0044] Furthermore, the handle assembly 6 is connected to the caliper body 1 through a tension retainer, and the handle assembly 6 is also connected to the traction rod 4 through a tension retainer;

[0045] In this embodiment, when the surgical forceps is in use, the movement of the movable handle 602 is used to control the movement of the traction rod 4, thereby realizing the expansion and contraction of the forceps head assembly 503, and the arc-shaped spring piece 603 is used to provide a stable rebound force for the movable handle 602, ensuring that the handle assembly 6 can quickly and accurately return to the initial position during the operation, thereby reducing the user's fatigue and improving the efficiency and accuracy of the operation. In addition.

[0046] It should be noted that the tension retainer includes a spring, which is located between the handle assembly 6 and the traction rod 4 to ensure that the traction rod 4 remains stable during operation. The ergonomic shape of the handle assembly 6 enables the user's hand to maintain a natural and comfortable posture during long-term use of the surgical forceps, further reducing the difficulty of operation and improving surgical safety.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foldable minimally invasive surgical forceps with bistable performance, comprising a forceps body (1) and a bistable foldable forceps head mechanism (5), characterized in that: The left end of the clamp body (1) is threadedly connected to a locking sleeve (2), and the clamp body (1) is fixedly connected to a clamp rod (3) through the locking sleeve (2). A traction rod (4) is slidably connected inside the clamp rod (3). The left end of the clamp rod (3) is connected to a bistable foldable clamp head mechanism (5), and the bistable foldable clamp head mechanism (5) comprises a fixing ring (501), a fixing plate (502) and a clamp head assembly (503). The fixing ring (501) is matched and fixedly connected to the outer wall of the left end of the clamp rod (3), and the fixing plate (502) is matched and fixedly connected to the left end of the traction rod (4). Four groups of clamp head assemblies (503) are connected at equal intervals on the circumference between the fixing ring (501) and the fixing plate (502). The right end of the clamp body (1) is connected to a handle assembly (6), and an endoscope (7) is fixedly installed at the center position of the left side of the fixing plate (502); The clamp head assembly (503) comprises an L-shaped connecting plate (5031), a stabilizing plate (5032) and a limiting plate (5033); the L-shaped connecting plate (5031) is an integrally formed right-angle structure with unequal length sides, wherein the long side of the bottom of the L-shaped connecting plate (5031) is arranged parallel to the stabilizing plate (5032), and the limiting plate (5033) is connected between the corner of the L-shaped connecting plate (5031) and one end corresponding to the stabilizing plate (5032).

2. The foldable minimally invasive surgical forceps with bistable performance according to claim 1, characterized in that: The bottom end of the limiting plate (5033) is fixedly connected to the side wall of the fixing plate (502), the top end of the limiting plate (5033) is rotatably connected to an L-shaped connecting plate (5031) via a hinge, and the bottom end of the limiting plate (5033) is rotatably connected to a stabilizing plate (5032) via a hinge.

3. The foldable minimally invasive surgical forceps with bistable performance according to claim 1, characterized in that: The pliers head assembly (503) further comprises a short plate (5034), a pliers arm (5035) and a pliers plate (5036); the top end of the short plate (5034) is rotatably connected to the side wall of the fixing ring (501) via a hinge, the bottom end of the short plate (5034) is rotatably connected to the top end of the short side of the L-shaped connecting plate (5031) via a hinge, and the bottom end of the pliers arm (5035) is fixedly connected to the pliers plate (5036).

4. The foldable minimally invasive surgical forceps with bistable performance according to claim 3, characterized in that: The top end of the clamp arm (5035) is rotatably connected to the bottom end of the long side of the L-shaped connecting plate (5031) via a hinge, and the bottom end of the clamp arm (5035) is rotatably connected to the end of the stabilizing plate (5032) away from the fixing plate (502) via a hinge.

5. The foldable minimally invasive surgical forceps with bistable performance according to claim 4, characterized in that: The clamp arm (5035) is arranged in parallel with the limiting plate (5033), and the clamp arm (5035) and the limiting plate (5033) have the same length.

6. The foldable minimally invasive surgical forceps with bistable performance according to claim 5, characterized in that: The long side of the L-shaped connecting plate (5031) is the same length as the stabilizing plate (5032), and the L-shaped connecting plate (5031), the stabilizing plate (5032), the limiting plate (5033) and the clamp arm (5035) are enclosed to form a parallelogram structure.

7. The foldable minimally invasive surgical forceps with bistable performance according to claim 1, characterized in that: The handle assembly (6) comprises a fixed handle (601), a movable handle (602) and an arc-shaped spring piece (603); the fixed handle (601) is fixedly connected to the right end of the pliers body (1); the fixed handle (601) is hingedly connected to the movable handle (602); the movable handle (602) is connected to a tension retainer in the pliers body (1); and the arc-shaped spring piece (603) is fixedly connected between the fixed handle (601) and the movable handle (602).

8. The foldable minimally invasive surgical forceps with bistable performance according to claim 1, characterized in that: The handle assembly (6) is connected to the caliper body (1) via a tension retainer, and the handle assembly (6) is also connected to the traction rod (4) via a tension retainer.

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