Exposure mechanism for endoscope minimally invasive surgery

Abstract

The utility model relates to the technical field of medical instruments, in particular to an exposing mechanism for endoscope minimally invasive surgery, which comprises a grip, a distraction rod is rotatably mounted at one end of the grip, an adjusting mechanism is arranged on the grip, and the adjusting mechanism is in transmission connection with the distraction rod. A folding angle parallel to the grip and an opening angle perpendicular to the grip are formed in the rotating stroke of the opening rod; according to the exposing mechanism for the endoscope minimally invasive surgery, the distraction rod is rotationally installed at the end of the grip, when the distraction rod stretches into the surgical site, the distraction rod can be kept parallel to the grip, namely the distraction rod is adjusted to be at the folding angle, so that the width of the exposing mechanism is reduced, and after the distraction rod reaches the surgical site, the distraction rod can be conveniently folded. The distraction rod is driven to rotate according to operation requirements, and the distraction rod is adjusted to an optimal distraction angle, so that an optimal operation visual field can be obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a revealing mechanism used for laparoscopic minimally invasive surgery. Background Art

[0002] Minimally invasive surgery, also known as keyhole surgery, laparoscopic surgery or endoscopic surgery, is a surgical technique that uses tiny incisions, special instruments and cameras (usually a laparoscope or thoracoscope). Compared with traditional open surgery, minimally invasive surgery aims to achieve treatment goals with less trauma, thereby reducing patient pain, bleeding, recovery time and scar formation. Minimally invasive surgery generally requires the use of an exposed mechanism.

[0003] For example, the patent with authorization announcement number CN216933310U, with announcement date of 2022-07-12, discloses a device for exposure and distraction in posterior lumbar surgery, including a first end fixing part, a universal connection mechanism, a main retractor and a second end fixing part; a first end fixing part, one end of which is connected to one end of the universal connection mechanism; a universal connection mechanism, which is provided with two connection ends, and the head of each end can rotate in multiple planes and multiple angles. The main retractor is directly or indirectly connected to the other end on the side of the universal connection mechanism; the second end fixing part is provided at the end of the head of the main retractor. The main retractor is connected to the second end fixing part through its head end, and its tail end is connected to the first end fixing part through a series of connections, so as to obtain stability and exert its distraction effect.

[0004] The existing distraction device has a complex structure and is not convenient for being extended into the surgical site for distraction. After being extended into the surgical site, the distraction angle is fixed, which is not convenient for smooth operation. Utility Model Content

[0005] The utility model aims to provide a revealing mechanism for laparoscopic minimally invasive surgery.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A mechanism for exposure in laparoscopic minimally invasive surgery comprises a grip, one end of which is rotatably mounted with a spreader rod, the grip is provided with an adjustment mechanism, the adjustment mechanism is transmission-connected to the spreader rod, and the spreader rod has a folding angle parallel to the grip and a spread angle perpendicular to the grip within its rotational travel.

[0008] The above-mentioned surgical exposure mechanism, the adjustment mechanism includes a first sprocket rotatably installed on the end of the handle away from the expansion rod, the expansion rod is rotatably connected to the handle through a rotating shaft, a second sprocket is fixed on the rotating shaft, and the first sprocket and the second sprocket are connected through a chain transmission.

[0009] The above-mentioned surgical exposure mechanism, the adjustment mechanism also includes a knob rotatably installed on the end of the handle away from the spreading rod, the end of the knob located in the handle is fixedly connected to an eccentric disk, a ratchet is coaxially fixed to the first sprocket, and a pawl is eccentrically installed on the eccentric disk. When the eccentric disk is driven to rotate, the pawl drives the ratchet to rotate intermittently.

[0010] The above-mentioned surgical exposure mechanism has a knob whose end outside the handle is triangular.

[0011] The above-mentioned surgical exposure mechanism has airbags installed at both ends of the expansion rod. The expansion rod is a rod body with a hollow interior and closed at both ends, and a number of air holes are opened in the area corresponding to the airbags on the expansion rod. The rotating shaft is a hollow rod body, and one end of the rotating shaft is connected to the interior of the expansion rod. An airway is arranged in the handle, and the airway is connected to the other end of the rotating shaft.

[0012] In the above-mentioned surgical exposure mechanism, one end of the rotating shaft corresponding to the airway is dynamically sealedly connected to the handle.

[0013] The above-mentioned surgical exposure mechanism has extension mechanisms at both ends of the expansion rod, and the extension mechanisms include arc plates symmetrically arranged on the outer wall of the expansion rod. The arc plates are fixedly connected with guide rods corresponding to the arc surfaces of the expansion rods. The guide rods penetrate into the interior of the expansion rod, and the inner wall of the airbag is fixedly connected to the corresponding arc plates.

[0014] In the above-mentioned surgical exposure mechanism, the length of the guide rod is greater than the radius of the cavity in the expansion rod.

[0015] In the above-mentioned surgical exposure mechanism, the inner diameter of the arc-shaped plate is equal to the outer diameter of the spreader rod.

[0016] The above-mentioned surgical exposure mechanism, the airbags all include an extension part and a connecting part, the deformation capacity of the extension part is greater than that of the connecting part, each airbag has two groups of extension parts and connecting parts, the extension parts and connecting parts are alternately arranged, and the connecting part is fixedly connected to the middle part of the corresponding arc plate.

[0017] In the above technical scheme, the utility model provides a mechanism for exposure of laparoscopic minimally invasive surgery. By rotating the expansion rod and installing it on the end of the handle, when the expansion rod is extended into the surgical site, the expansion rod can be kept parallel to the handle, that is, the expansion rod is adjusted to a folding angle to reduce the width of the exposure mechanism. After reaching the surgical site, the expansion rod is driven to rotate according to the surgical needs, and the expansion rod is adjusted to an optimal expansion angle to obtain an optimal surgical field of view. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the structure of the expansion rod provided in an embodiment of the utility model at an expansion angle;

[0020] Figure 2 A cross-sectional view of the expansion rod of the airbag provided in the embodiment of the utility model when it is in an inflated state;

[0021] Figure 3 This is an enlarged schematic diagram of the front structure of the adjustment mechanism provided in the embodiment of the utility model;

[0022] Figure 4 An enlarged schematic diagram of the side structure of the adjustment mechanism provided in the embodiment of the utility model;

[0023] Figure 5 A partially enlarged schematic diagram of a propping rod provided in an embodiment of the utility model;

[0024] Figure 6 A cross-sectional view of a propping rod provided in an embodiment of the utility model;

[0025] Figure 7 A schematic diagram of the positional relationship between the extending portion and the connecting portion provided in an embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1. Handle; 11. Airway; 2. Spreader rod; 21. Rotating shaft; 22. Airbag; 221. Extension part; 222. Connecting part; 23. Air hole; 3. Adjusting mechanism; 31. First sprocket; 32. Second sprocket; 33. Chain; 34. Knob; 35. Eccentric disk; 36. Ratchet; 37. Paw; 4. Arc plate; 41. Guide rod. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] In the description of the present utility model, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] like Figure 1-Figure 7 As shown, an embodiment of the utility model provides a mechanism for exposure in laparoscopic minimally invasive surgery, including a handle 1, a spreading rod 2 is rotatably mounted on one end of the handle 1, an adjustment mechanism 3 is arranged on the handle 1, the adjustment mechanism 3 is transmission-connected to the spreading rod 2, and the spreading rod 2 has a folding angle parallel to the handle 1 and an spreading angle perpendicular to the handle 1 within its rotational travel.

[0031] Preferably, the adjustment mechanism 3 includes a first sprocket 31 rotatably mounted on one end of the handle 1 away from the expansion rod 2, the expansion rod 2 is rotatably connected to the handle 1 via a rotating shaft 21, a second sprocket 32 ​​is fixedly connected to the rotating shaft 21, and the first sprocket 31 and the second sprocket 32 ​​are connected via a chain 33.

[0032] Specifically, the spreading rod 2 is rotatably connected to the handle 1 via a rotating shaft 21. Figure 3 and Figure 4 As shown, one end of the rotating shaft 21 is fixedly connected to the middle part of the spreading rod 2, and the other end of the rotating shaft 21 passes through the interior of the handle 1 and is rotatably connected to the handle 1. A chamber is provided in the handle 1, and the first sprocket 31 and the second sprocket 32 ​​are both located in the chamber, and the first sprocket 31 and the second sprocket 32 ​​are connected by a chain 33. Optionally, a driving member such as a micro motor is installed at a position corresponding to the first sprocket 31 on the handle 1, and the output end of the micro motor is coaxially connected to the first sprocket 31. The first sprocket 31 is driven to rotate to drive the second sprocket 32 ​​to rotate, thereby driving the spreading rod 2 to rotate from the folding angle to the spreading angle. Figure 1 The view of the expansion rod 2 at the expansion angle. Figure 1 When the middle support rod 2 is rotated to a vertical state, it is at a folding angle.

[0033] The embodiment of the utility model provides a mechanism for exposure during laparoscopic minimally invasive surgery. By rotating the expansion rod 2 to install it on the end of the handle 1, when the expansion rod 2 is extended into the surgical site, the expansion rod 2 can be kept parallel to the handle 1, that is, the expansion rod 2 is adjusted to a folding angle to reduce the width of the exposure mechanism. After reaching the surgical site, the expansion rod 2 is driven to rotate according to the surgical needs, and the expansion rod 2 is adjusted to an optimal expansion angle to obtain an optimal surgical field of view.

[0034] Furthermore, the adjustment mechanism 3 also includes a knob 34 rotatably mounted on the end of the handle 1 away from the spreading rod 2, an eccentric disk 35 is fixedly connected to one end of the knob 34 located inside the handle 1, a ratchet 36 is coaxially fixedly connected to the first sprocket 31, a pawl 37 is eccentrically mounted on the eccentric disk 35, and when the eccentric disk 35 is driven to rotate, the pawl 37 drives the ratchet 36 to rotate intermittently.

[0035] Preferably, the end of the knob 34 outside the handle 1 is triangular.

[0036] Specifically, the first sprocket 31 is driven by the ratchet 36 mechanism disposed on the handle 1, so that the first sprocket 31 can be driven to rotate intermittently, thereby facilitating the adjustment of the expansion rod 2 to the optimal expansion angle, and the self-locking function of the ratchet 36 mechanism can prevent the expansion rod 2 from rotating in the opposite direction, thereby stably maintaining the expansion rod 2 at the optimal expansion angle.

[0037] In another embodiment of the present invention, both ends of the expansion rod 2 are equipped with air bags 22, the expansion rod 2 is a rod body with a hollow interior and closed at both ends, and a plurality of air holes 23 are opened in the area corresponding to the air bags 22 on the expansion rod 2, the rotating shaft 21 is a hollow rod body, and one end of the rotating shaft 21 is connected to the interior of the expansion rod 2, and an air channel 11 is provided in the handle 1, and the air channel 11 is connected to the other end of the rotating shaft 21.

[0038] Preferably, one end of the rotating shaft 21 corresponding to the air passage 11 is dynamically sealedly connected to the handle 1 .

[0039] Specifically, in the above embodiment, the surgical field of view is expanded only by rotating the expansion rod 2. However, due to the limitation of the diameter of the expansion rod 2, the surgical field of view is small, which is inconvenient for surgery. Increasing the diameter of the expansion rod 2 will lead to a larger surgical incision. In this embodiment, both ends of the expansion rod 2 for expanding the surgical field of view are equipped with air bags 22. The air bags 22 are cylindrical structures with one end semicircular to match the end of the expansion rod 2. Figure 2 and Figure 4 As shown, the opening rod 2 and the rotating shaft 21 are both hollow structures, and an air passage 11 is provided in the handle 1, and an air inlet pipe is connected to the end of the air passage 11 to facilitate connection with an external air source such as an air pump. Figure 4As shown, after the surgical exposure mechanism is extended to the surgical site, the expansion rod 2 is first rotated to the optimal expansion angle, and then the two air bags 22 are filled with gas through the air pump to inflate the air bags 22 to increase the expansion area and expand the surgical field of view.

[0040] Further, both ends of the expansion rod 2 are provided with an extension mechanism, and the extension mechanism includes an arc plate 4 symmetrically arranged on the outer wall of the expansion rod 2, and the arc plate 4 is fixedly connected with a guide rod 41 corresponding to the arc surface of the expansion rod 2, and the guide rod 41 penetrates into the interior of the expansion rod 2, and the inner wall of the airbag 22 is fixedly connected to the corresponding arc plate 4. Preferably, the arc plate 4 is also provided with air holes 23, and the air holes 23 provided on the arc plate 4 correspond to the air holes 23 provided on the expansion rod 2 one by one, such as Figure 5 shown.

[0041] Preferably, the length of the guide rod 41 is greater than the radius of the cavity in the expansion rod 2. Preferably, the surface of the guide rod 41 is smooth, so that after the operation is completed, the gas in the airbag 22 can be extracted so that the airbag 22 drives the arc plate 4 to contact the surface of the expansion rod 2 again.

[0042] Preferably, the inner diameter of the arc-shaped plate 4 is equal to the outer diameter of the expansion rod 2 .

[0043] Specifically, in the above embodiment, the diameter of the expansion rod 2 is increased by inflating the airbag 22, thereby expanding the surgical field of view. However, the stability of the airbag 22 is poor. The inflated airbag 22 is easily deformed into an irregular shape by the pressure from the human tissue, thereby failing to provide a suitable surgical field of view. In this embodiment, a curved plate 4 is installed on the outside of the expansion rod 2, such as Figure 4 and Figure 7 As shown, Figure 4 and Figure 7 The middle arc plate 4 is installed on the left and right sides of the opening rod 2. When the airbag 22 is inflated, it will pull the two arc plates 4 to Figure 4 The arc plate 4 is limited by the guide rod 41 and can only move along Figure 4 or Figure 7 The surgical exposure mechanism slides in the horizontal direction, so that the human tissue can be stably opened to ensure the smooth progress of the operation.

[0044] Furthermore, each airbag 22 includes an extension portion 221 and a connecting portion 222, the deformation capacity of the extension portion 221 is greater than that of the connecting portion 222, and two groups of the extension portion 221 and the connecting portion 222 of each airbag 22 are arranged, the extension portion 221 and the connecting portion 222 are arranged alternately, and the connecting portion 222 is fixedly connected to the middle part of the corresponding arc plate 4.

[0045] Specifically, to ensure that the main expansion direction of the airbag 22 can be along Figure 4In the horizontal direction, the airbag 22 is increased after expansion. Figure 4 The airbag 22 has a horizontal dimension and is composed of two materials with different deformation capabilities. Optionally, the connecting portion 222 may be made of a material that has no deformation capability or has low deformation capability. The connecting portion 222 may be connected to the arc plate 4 by bonding. During the expansion of the airbag 22, the change in the overall volume of the airbag 22 is mainly adapted by the deformation of the stretching portion 221.

[0046] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mechanism for exposure in laparoscopic minimally invasive surgery, comprising a handle, characterized in that: A spreading rod is rotatably mounted on one end of the handle, an adjusting mechanism is arranged on the handle, the adjusting mechanism is transmission-connected with the spreading rod, and the spreading rod has a folding angle parallel to the handle and a spreading angle perpendicular to the handle within the rotation stroke.

2. The exposure mechanism for laparoscopic minimally invasive surgery according to claim 1, characterized in that: The adjusting mechanism comprises a first sprocket rotatably mounted on one end of the handle away from the spreading rod. The spreading rod is rotatably connected to the handle via a rotating shaft. A second sprocket is fixedly connected to the rotating shaft. The first sprocket and the second sprocket are connected via a chain transmission.

3. The exposure mechanism for laparoscopic minimally invasive surgery according to claim 2, characterized in that: The adjustment mechanism also includes a knob rotatably mounted on the end of the handle away from the expansion rod, an eccentric disk is fixedly connected to the end of the knob inside the handle, a ratchet is coaxially fixedly connected to the first sprocket, a pawl is eccentrically mounted on the eccentric disk, and when the eccentric disk is driven to rotate, the pawl drives the ratchet to rotate intermittently.

4. The exposure mechanism for laparoscopic minimally invasive surgery according to claim 3, characterized in that: The end of the knob outside the handle is triangular.

5. The exposure mechanism for laparoscopic minimally invasive surgery according to claim 2, characterized in that: Both ends of the expansion rod are equipped with air bags. The expansion rod is a rod body with a hollow interior and closed at both ends. A number of air holes are opened in the area corresponding to the air bags on the expansion rod. The rotating shaft is a hollow rod body, and one end of the rotating shaft is connected to the interior of the expansion rod. An airway is arranged in the handle, and the airway is connected to the other end of the rotating shaft.

6. The exposure mechanism for laparoscopic minimally invasive surgery according to claim 5, characterized in that: One end of the rotating shaft corresponding to the air passage is connected to the handle in a dynamic seal.

7. The exposure mechanism for laparoscopic minimally invasive surgery according to claim 5, characterized in that: Extension mechanisms are provided at both ends of the expansion rod, and the extension mechanisms include arc plates symmetrically arranged on the outer wall of the expansion rod. The arc plates are fixedly connected with guide rods corresponding to the arc surfaces of the expansion rods. The guide rods penetrate into the interior of the expansion rod, and the inner wall of the airbag is fixedly connected to the corresponding arc plates.

8. The exposure mechanism for laparoscopic minimally invasive surgery according to claim 7, characterized in that: The length of the guide rod is greater than the radius of the cavity in the expansion rod.

9. The exposure mechanism for laparoscopic minimally invasive surgery according to claim 7, characterized in that: The inner diameter of the arc plate is equal to the outer diameter of the expansion rod.

10. The exposure mechanism for laparoscopic minimally invasive surgery according to claim 7, characterized in that: The airbags all include an extension part and a connection part. The deformation capacity of the extension part is greater than that of the connection part. Each airbag has two groups of extension parts and connection parts, which are alternately arranged. The connection part is fixedly connected to the middle part of the corresponding arc plate.

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